A library for setting up Secure Socket Layer (SSL) connections and verifying remote hosts using certificates. Contains only the source files for mbed platform implementation of the library.
Dependents: HTTPClient-SSL HTTPClient-SSL HTTPClient-SSL HTTPClient-SSL
ctaocrypt/src/pkcs7.c@0:b86d15c6ba29, 2015-01-19 (annotated)
- Committer:
- Vanger
- Date:
- Mon Jan 19 21:45:42 2015 +0000
- Revision:
- 0:b86d15c6ba29
Updated CyaSSL Library to 3.3.0. Changed Settings and functions to be implemented for mbed platforms
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Vanger | 0:b86d15c6ba29 | 1 | /* pkcs7.c |
Vanger | 0:b86d15c6ba29 | 2 | * |
Vanger | 0:b86d15c6ba29 | 3 | * Copyright (C) 2006-2014 wolfSSL Inc. |
Vanger | 0:b86d15c6ba29 | 4 | * |
Vanger | 0:b86d15c6ba29 | 5 | * This file is part of CyaSSL. |
Vanger | 0:b86d15c6ba29 | 6 | * |
Vanger | 0:b86d15c6ba29 | 7 | * CyaSSL is free software; you can redistribute it and/or modify |
Vanger | 0:b86d15c6ba29 | 8 | * it under the terms of the GNU General Public License as published by |
Vanger | 0:b86d15c6ba29 | 9 | * the Free Software Foundation; either version 2 of the License, or |
Vanger | 0:b86d15c6ba29 | 10 | * (at your option) any later version. |
Vanger | 0:b86d15c6ba29 | 11 | * |
Vanger | 0:b86d15c6ba29 | 12 | * CyaSSL is distributed in the hope that it will be useful, |
Vanger | 0:b86d15c6ba29 | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
Vanger | 0:b86d15c6ba29 | 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Vanger | 0:b86d15c6ba29 | 15 | * GNU General Public License for more details. |
Vanger | 0:b86d15c6ba29 | 16 | * |
Vanger | 0:b86d15c6ba29 | 17 | * You should have received a copy of the GNU General Public License |
Vanger | 0:b86d15c6ba29 | 18 | * along with this program; if not, write to the Free Software |
Vanger | 0:b86d15c6ba29 | 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
Vanger | 0:b86d15c6ba29 | 20 | */ |
Vanger | 0:b86d15c6ba29 | 21 | |
Vanger | 0:b86d15c6ba29 | 22 | #ifdef HAVE_CONFIG_H |
Vanger | 0:b86d15c6ba29 | 23 | #include <config.h> |
Vanger | 0:b86d15c6ba29 | 24 | #endif |
Vanger | 0:b86d15c6ba29 | 25 | |
Vanger | 0:b86d15c6ba29 | 26 | #include <cyassl/ctaocrypt/settings.h> |
Vanger | 0:b86d15c6ba29 | 27 | |
Vanger | 0:b86d15c6ba29 | 28 | #ifdef HAVE_PKCS7 |
Vanger | 0:b86d15c6ba29 | 29 | |
Vanger | 0:b86d15c6ba29 | 30 | #include <cyassl/ctaocrypt/pkcs7.h> |
Vanger | 0:b86d15c6ba29 | 31 | #include <cyassl/ctaocrypt/error-crypt.h> |
Vanger | 0:b86d15c6ba29 | 32 | #include <cyassl/ctaocrypt/logging.h> |
Vanger | 0:b86d15c6ba29 | 33 | |
Vanger | 0:b86d15c6ba29 | 34 | #ifndef min |
Vanger | 0:b86d15c6ba29 | 35 | static INLINE word32 min(word32 a, word32 b) |
Vanger | 0:b86d15c6ba29 | 36 | { |
Vanger | 0:b86d15c6ba29 | 37 | return a > b ? b : a; |
Vanger | 0:b86d15c6ba29 | 38 | } |
Vanger | 0:b86d15c6ba29 | 39 | #endif |
Vanger | 0:b86d15c6ba29 | 40 | |
Vanger | 0:b86d15c6ba29 | 41 | |
Vanger | 0:b86d15c6ba29 | 42 | /* placed ASN.1 contentType OID into *output, return idx on success, |
Vanger | 0:b86d15c6ba29 | 43 | * 0 upon failure */ |
Vanger | 0:b86d15c6ba29 | 44 | CYASSL_LOCAL int SetContentType(int pkcs7TypeOID, byte* output) |
Vanger | 0:b86d15c6ba29 | 45 | { |
Vanger | 0:b86d15c6ba29 | 46 | /* PKCS#7 content types, RFC 2315, section 14 */ |
Vanger | 0:b86d15c6ba29 | 47 | static const byte pkcs7[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 48 | 0x0D, 0x01, 0x07 }; |
Vanger | 0:b86d15c6ba29 | 49 | static const byte data[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 50 | 0x0D, 0x01, 0x07, 0x01 }; |
Vanger | 0:b86d15c6ba29 | 51 | static const byte signedData[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 52 | 0x0D, 0x01, 0x07, 0x02}; |
Vanger | 0:b86d15c6ba29 | 53 | static const byte envelopedData[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 54 | 0x0D, 0x01, 0x07, 0x03 }; |
Vanger | 0:b86d15c6ba29 | 55 | static const byte signedAndEnveloped[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 56 | 0x0D, 0x01, 0x07, 0x04 }; |
Vanger | 0:b86d15c6ba29 | 57 | static const byte digestedData[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 58 | 0x0D, 0x01, 0x07, 0x05 }; |
Vanger | 0:b86d15c6ba29 | 59 | static const byte encryptedData[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, |
Vanger | 0:b86d15c6ba29 | 60 | 0x0D, 0x01, 0x07, 0x06 }; |
Vanger | 0:b86d15c6ba29 | 61 | |
Vanger | 0:b86d15c6ba29 | 62 | int idSz; |
Vanger | 0:b86d15c6ba29 | 63 | int typeSz = 0, idx = 0; |
Vanger | 0:b86d15c6ba29 | 64 | const byte* typeName = 0; |
Vanger | 0:b86d15c6ba29 | 65 | byte ID_Length[MAX_LENGTH_SZ]; |
Vanger | 0:b86d15c6ba29 | 66 | |
Vanger | 0:b86d15c6ba29 | 67 | switch (pkcs7TypeOID) { |
Vanger | 0:b86d15c6ba29 | 68 | case PKCS7_MSG: |
Vanger | 0:b86d15c6ba29 | 69 | typeSz = sizeof(pkcs7); |
Vanger | 0:b86d15c6ba29 | 70 | typeName = pkcs7; |
Vanger | 0:b86d15c6ba29 | 71 | break; |
Vanger | 0:b86d15c6ba29 | 72 | |
Vanger | 0:b86d15c6ba29 | 73 | case DATA: |
Vanger | 0:b86d15c6ba29 | 74 | typeSz = sizeof(data); |
Vanger | 0:b86d15c6ba29 | 75 | typeName = data; |
Vanger | 0:b86d15c6ba29 | 76 | break; |
Vanger | 0:b86d15c6ba29 | 77 | |
Vanger | 0:b86d15c6ba29 | 78 | case SIGNED_DATA: |
Vanger | 0:b86d15c6ba29 | 79 | typeSz = sizeof(signedData); |
Vanger | 0:b86d15c6ba29 | 80 | typeName = signedData; |
Vanger | 0:b86d15c6ba29 | 81 | break; |
Vanger | 0:b86d15c6ba29 | 82 | |
Vanger | 0:b86d15c6ba29 | 83 | case ENVELOPED_DATA: |
Vanger | 0:b86d15c6ba29 | 84 | typeSz = sizeof(envelopedData); |
Vanger | 0:b86d15c6ba29 | 85 | typeName = envelopedData; |
Vanger | 0:b86d15c6ba29 | 86 | break; |
Vanger | 0:b86d15c6ba29 | 87 | |
Vanger | 0:b86d15c6ba29 | 88 | case SIGNED_AND_ENVELOPED_DATA: |
Vanger | 0:b86d15c6ba29 | 89 | typeSz = sizeof(signedAndEnveloped); |
Vanger | 0:b86d15c6ba29 | 90 | typeName = signedAndEnveloped; |
Vanger | 0:b86d15c6ba29 | 91 | break; |
Vanger | 0:b86d15c6ba29 | 92 | |
Vanger | 0:b86d15c6ba29 | 93 | case DIGESTED_DATA: |
Vanger | 0:b86d15c6ba29 | 94 | typeSz = sizeof(digestedData); |
Vanger | 0:b86d15c6ba29 | 95 | typeName = digestedData; |
Vanger | 0:b86d15c6ba29 | 96 | break; |
Vanger | 0:b86d15c6ba29 | 97 | |
Vanger | 0:b86d15c6ba29 | 98 | case ENCRYPTED_DATA: |
Vanger | 0:b86d15c6ba29 | 99 | typeSz = sizeof(encryptedData); |
Vanger | 0:b86d15c6ba29 | 100 | typeName = encryptedData; |
Vanger | 0:b86d15c6ba29 | 101 | break; |
Vanger | 0:b86d15c6ba29 | 102 | |
Vanger | 0:b86d15c6ba29 | 103 | default: |
Vanger | 0:b86d15c6ba29 | 104 | CYASSL_MSG("Unknown PKCS#7 Type"); |
Vanger | 0:b86d15c6ba29 | 105 | return 0; |
Vanger | 0:b86d15c6ba29 | 106 | }; |
Vanger | 0:b86d15c6ba29 | 107 | |
Vanger | 0:b86d15c6ba29 | 108 | idSz = SetLength(typeSz, ID_Length); |
Vanger | 0:b86d15c6ba29 | 109 | output[idx++] = ASN_OBJECT_ID; |
Vanger | 0:b86d15c6ba29 | 110 | XMEMCPY(output + idx, ID_Length, idSz); |
Vanger | 0:b86d15c6ba29 | 111 | idx += idSz; |
Vanger | 0:b86d15c6ba29 | 112 | XMEMCPY(output + idx, typeName, typeSz); |
Vanger | 0:b86d15c6ba29 | 113 | idx += typeSz; |
Vanger | 0:b86d15c6ba29 | 114 | |
Vanger | 0:b86d15c6ba29 | 115 | return idx; |
Vanger | 0:b86d15c6ba29 | 116 | |
Vanger | 0:b86d15c6ba29 | 117 | } |
Vanger | 0:b86d15c6ba29 | 118 | |
Vanger | 0:b86d15c6ba29 | 119 | |
Vanger | 0:b86d15c6ba29 | 120 | /* get ASN.1 contentType OID sum, return 0 on success, <0 on failure */ |
Vanger | 0:b86d15c6ba29 | 121 | int GetContentType(const byte* input, word32* inOutIdx, word32* oid, |
Vanger | 0:b86d15c6ba29 | 122 | word32 maxIdx) |
Vanger | 0:b86d15c6ba29 | 123 | { |
Vanger | 0:b86d15c6ba29 | 124 | int length; |
Vanger | 0:b86d15c6ba29 | 125 | word32 i = *inOutIdx; |
Vanger | 0:b86d15c6ba29 | 126 | byte b; |
Vanger | 0:b86d15c6ba29 | 127 | *oid = 0; |
Vanger | 0:b86d15c6ba29 | 128 | |
Vanger | 0:b86d15c6ba29 | 129 | CYASSL_ENTER("GetContentType"); |
Vanger | 0:b86d15c6ba29 | 130 | |
Vanger | 0:b86d15c6ba29 | 131 | b = input[i++]; |
Vanger | 0:b86d15c6ba29 | 132 | if (b != ASN_OBJECT_ID) |
Vanger | 0:b86d15c6ba29 | 133 | return ASN_OBJECT_ID_E; |
Vanger | 0:b86d15c6ba29 | 134 | |
Vanger | 0:b86d15c6ba29 | 135 | if (GetLength(input, &i, &length, maxIdx) < 0) |
Vanger | 0:b86d15c6ba29 | 136 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 137 | |
Vanger | 0:b86d15c6ba29 | 138 | while(length--) { |
Vanger | 0:b86d15c6ba29 | 139 | *oid += input[i]; |
Vanger | 0:b86d15c6ba29 | 140 | i++; |
Vanger | 0:b86d15c6ba29 | 141 | } |
Vanger | 0:b86d15c6ba29 | 142 | |
Vanger | 0:b86d15c6ba29 | 143 | *inOutIdx = i; |
Vanger | 0:b86d15c6ba29 | 144 | |
Vanger | 0:b86d15c6ba29 | 145 | return 0; |
Vanger | 0:b86d15c6ba29 | 146 | } |
Vanger | 0:b86d15c6ba29 | 147 | |
Vanger | 0:b86d15c6ba29 | 148 | |
Vanger | 0:b86d15c6ba29 | 149 | /* init PKCS7 struct with recipient cert, decode into DecodedCert */ |
Vanger | 0:b86d15c6ba29 | 150 | int PKCS7_InitWithCert(PKCS7* pkcs7, byte* cert, word32 certSz) |
Vanger | 0:b86d15c6ba29 | 151 | { |
Vanger | 0:b86d15c6ba29 | 152 | int ret = 0; |
Vanger | 0:b86d15c6ba29 | 153 | |
Vanger | 0:b86d15c6ba29 | 154 | XMEMSET(pkcs7, 0, sizeof(PKCS7)); |
Vanger | 0:b86d15c6ba29 | 155 | if (cert != NULL && certSz > 0) { |
Vanger | 0:b86d15c6ba29 | 156 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 157 | DecodedCert* dCert; |
Vanger | 0:b86d15c6ba29 | 158 | |
Vanger | 0:b86d15c6ba29 | 159 | dCert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, |
Vanger | 0:b86d15c6ba29 | 160 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 161 | if (dCert == NULL) |
Vanger | 0:b86d15c6ba29 | 162 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 163 | #else |
Vanger | 0:b86d15c6ba29 | 164 | DecodedCert stack_dCert; |
Vanger | 0:b86d15c6ba29 | 165 | DecodedCert* dCert = &stack_dCert; |
Vanger | 0:b86d15c6ba29 | 166 | #endif |
Vanger | 0:b86d15c6ba29 | 167 | |
Vanger | 0:b86d15c6ba29 | 168 | pkcs7->singleCert = cert; |
Vanger | 0:b86d15c6ba29 | 169 | pkcs7->singleCertSz = certSz; |
Vanger | 0:b86d15c6ba29 | 170 | InitDecodedCert(dCert, cert, certSz, 0); |
Vanger | 0:b86d15c6ba29 | 171 | |
Vanger | 0:b86d15c6ba29 | 172 | ret = ParseCert(dCert, CA_TYPE, NO_VERIFY, 0); |
Vanger | 0:b86d15c6ba29 | 173 | if (ret < 0) { |
Vanger | 0:b86d15c6ba29 | 174 | FreeDecodedCert(dCert); |
Vanger | 0:b86d15c6ba29 | 175 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 176 | XFREE(dCert, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 177 | #endif |
Vanger | 0:b86d15c6ba29 | 178 | return ret; |
Vanger | 0:b86d15c6ba29 | 179 | } |
Vanger | 0:b86d15c6ba29 | 180 | |
Vanger | 0:b86d15c6ba29 | 181 | XMEMCPY(pkcs7->publicKey, dCert->publicKey, dCert->pubKeySize); |
Vanger | 0:b86d15c6ba29 | 182 | pkcs7->publicKeySz = dCert->pubKeySize; |
Vanger | 0:b86d15c6ba29 | 183 | XMEMCPY(pkcs7->issuerHash, dCert->issuerHash, SHA_SIZE); |
Vanger | 0:b86d15c6ba29 | 184 | pkcs7->issuer = dCert->issuerRaw; |
Vanger | 0:b86d15c6ba29 | 185 | pkcs7->issuerSz = dCert->issuerRawLen; |
Vanger | 0:b86d15c6ba29 | 186 | XMEMCPY(pkcs7->issuerSn, dCert->serial, dCert->serialSz); |
Vanger | 0:b86d15c6ba29 | 187 | pkcs7->issuerSnSz = dCert->serialSz; |
Vanger | 0:b86d15c6ba29 | 188 | FreeDecodedCert(dCert); |
Vanger | 0:b86d15c6ba29 | 189 | |
Vanger | 0:b86d15c6ba29 | 190 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 191 | XFREE(dCert, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 192 | #endif |
Vanger | 0:b86d15c6ba29 | 193 | } |
Vanger | 0:b86d15c6ba29 | 194 | |
Vanger | 0:b86d15c6ba29 | 195 | return ret; |
Vanger | 0:b86d15c6ba29 | 196 | } |
Vanger | 0:b86d15c6ba29 | 197 | |
Vanger | 0:b86d15c6ba29 | 198 | |
Vanger | 0:b86d15c6ba29 | 199 | /* releases any memory allocated by a PKCS7 initializer */ |
Vanger | 0:b86d15c6ba29 | 200 | void PKCS7_Free(PKCS7* pkcs7) |
Vanger | 0:b86d15c6ba29 | 201 | { |
Vanger | 0:b86d15c6ba29 | 202 | (void)pkcs7; |
Vanger | 0:b86d15c6ba29 | 203 | } |
Vanger | 0:b86d15c6ba29 | 204 | |
Vanger | 0:b86d15c6ba29 | 205 | |
Vanger | 0:b86d15c6ba29 | 206 | /* build PKCS#7 data content type */ |
Vanger | 0:b86d15c6ba29 | 207 | int PKCS7_EncodeData(PKCS7* pkcs7, byte* output, word32 outputSz) |
Vanger | 0:b86d15c6ba29 | 208 | { |
Vanger | 0:b86d15c6ba29 | 209 | static const byte oid[] = |
Vanger | 0:b86d15c6ba29 | 210 | { ASN_OBJECT_ID, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, |
Vanger | 0:b86d15c6ba29 | 211 | 0x07, 0x01 }; |
Vanger | 0:b86d15c6ba29 | 212 | byte seq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 213 | byte octetStr[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 214 | word32 seqSz; |
Vanger | 0:b86d15c6ba29 | 215 | word32 octetStrSz; |
Vanger | 0:b86d15c6ba29 | 216 | word32 oidSz = (word32)sizeof(oid); |
Vanger | 0:b86d15c6ba29 | 217 | int idx = 0; |
Vanger | 0:b86d15c6ba29 | 218 | |
Vanger | 0:b86d15c6ba29 | 219 | octetStrSz = SetOctetString(pkcs7->contentSz, octetStr); |
Vanger | 0:b86d15c6ba29 | 220 | seqSz = SetSequence(pkcs7->contentSz + octetStrSz + oidSz, seq); |
Vanger | 0:b86d15c6ba29 | 221 | |
Vanger | 0:b86d15c6ba29 | 222 | if (outputSz < pkcs7->contentSz + octetStrSz + oidSz + seqSz) |
Vanger | 0:b86d15c6ba29 | 223 | return BUFFER_E; |
Vanger | 0:b86d15c6ba29 | 224 | |
Vanger | 0:b86d15c6ba29 | 225 | XMEMCPY(output, seq, seqSz); |
Vanger | 0:b86d15c6ba29 | 226 | idx += seqSz; |
Vanger | 0:b86d15c6ba29 | 227 | XMEMCPY(output + idx, oid, oidSz); |
Vanger | 0:b86d15c6ba29 | 228 | idx += oidSz; |
Vanger | 0:b86d15c6ba29 | 229 | XMEMCPY(output + idx, octetStr, octetStrSz); |
Vanger | 0:b86d15c6ba29 | 230 | idx += octetStrSz; |
Vanger | 0:b86d15c6ba29 | 231 | XMEMCPY(output + idx, pkcs7->content, pkcs7->contentSz); |
Vanger | 0:b86d15c6ba29 | 232 | idx += pkcs7->contentSz; |
Vanger | 0:b86d15c6ba29 | 233 | |
Vanger | 0:b86d15c6ba29 | 234 | return idx; |
Vanger | 0:b86d15c6ba29 | 235 | } |
Vanger | 0:b86d15c6ba29 | 236 | |
Vanger | 0:b86d15c6ba29 | 237 | |
Vanger | 0:b86d15c6ba29 | 238 | typedef struct EncodedAttrib { |
Vanger | 0:b86d15c6ba29 | 239 | byte valueSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 240 | const byte* oid; |
Vanger | 0:b86d15c6ba29 | 241 | byte valueSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 242 | const byte* value; |
Vanger | 0:b86d15c6ba29 | 243 | word32 valueSeqSz, oidSz, idSz, valueSetSz, valueSz, totalSz; |
Vanger | 0:b86d15c6ba29 | 244 | } EncodedAttrib; |
Vanger | 0:b86d15c6ba29 | 245 | |
Vanger | 0:b86d15c6ba29 | 246 | |
Vanger | 0:b86d15c6ba29 | 247 | typedef struct ESD { |
Vanger | 0:b86d15c6ba29 | 248 | Sha sha; |
Vanger | 0:b86d15c6ba29 | 249 | byte contentDigest[SHA_DIGEST_SIZE + 2]; /* content only + ASN.1 heading */ |
Vanger | 0:b86d15c6ba29 | 250 | byte contentAttribsDigest[SHA_DIGEST_SIZE]; |
Vanger | 0:b86d15c6ba29 | 251 | byte encContentDigest[512]; |
Vanger | 0:b86d15c6ba29 | 252 | |
Vanger | 0:b86d15c6ba29 | 253 | byte outerSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 254 | byte outerContent[MAX_EXP_SZ]; |
Vanger | 0:b86d15c6ba29 | 255 | byte innerSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 256 | byte version[MAX_VERSION_SZ]; |
Vanger | 0:b86d15c6ba29 | 257 | byte digAlgoIdSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 258 | byte singleDigAlgoId[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 259 | |
Vanger | 0:b86d15c6ba29 | 260 | byte contentInfoSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 261 | byte innerContSeq[MAX_EXP_SZ]; |
Vanger | 0:b86d15c6ba29 | 262 | byte innerOctets[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 263 | |
Vanger | 0:b86d15c6ba29 | 264 | byte certsSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 265 | |
Vanger | 0:b86d15c6ba29 | 266 | byte signerInfoSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 267 | byte signerInfoSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 268 | byte signerVersion[MAX_VERSION_SZ]; |
Vanger | 0:b86d15c6ba29 | 269 | byte issuerSnSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 270 | byte issuerName[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 271 | byte issuerSn[MAX_SN_SZ]; |
Vanger | 0:b86d15c6ba29 | 272 | byte signerDigAlgoId[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 273 | byte digEncAlgoId[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 274 | byte signedAttribSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 275 | EncodedAttrib signedAttribs[6]; |
Vanger | 0:b86d15c6ba29 | 276 | byte signerDigest[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 277 | word32 innerOctetsSz, innerContSeqSz, contentInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 278 | word32 outerSeqSz, outerContentSz, innerSeqSz, versionSz, digAlgoIdSetSz, |
Vanger | 0:b86d15c6ba29 | 279 | singleDigAlgoIdSz, certsSetSz; |
Vanger | 0:b86d15c6ba29 | 280 | word32 signerInfoSetSz, signerInfoSeqSz, signerVersionSz, |
Vanger | 0:b86d15c6ba29 | 281 | issuerSnSeqSz, issuerNameSz, issuerSnSz, |
Vanger | 0:b86d15c6ba29 | 282 | signerDigAlgoIdSz, digEncAlgoIdSz, signerDigestSz; |
Vanger | 0:b86d15c6ba29 | 283 | word32 encContentDigestSz, signedAttribsSz, signedAttribsCount, |
Vanger | 0:b86d15c6ba29 | 284 | signedAttribSetSz; |
Vanger | 0:b86d15c6ba29 | 285 | } ESD; |
Vanger | 0:b86d15c6ba29 | 286 | |
Vanger | 0:b86d15c6ba29 | 287 | |
Vanger | 0:b86d15c6ba29 | 288 | static int EncodeAttributes(EncodedAttrib* ea, int eaSz, |
Vanger | 0:b86d15c6ba29 | 289 | PKCS7Attrib* attribs, int attribsSz) |
Vanger | 0:b86d15c6ba29 | 290 | { |
Vanger | 0:b86d15c6ba29 | 291 | int i; |
Vanger | 0:b86d15c6ba29 | 292 | int maxSz = min(eaSz, attribsSz); |
Vanger | 0:b86d15c6ba29 | 293 | int allAttribsSz = 0; |
Vanger | 0:b86d15c6ba29 | 294 | |
Vanger | 0:b86d15c6ba29 | 295 | for (i = 0; i < maxSz; i++) |
Vanger | 0:b86d15c6ba29 | 296 | { |
Vanger | 0:b86d15c6ba29 | 297 | int attribSz = 0; |
Vanger | 0:b86d15c6ba29 | 298 | |
Vanger | 0:b86d15c6ba29 | 299 | ea[i].value = attribs[i].value; |
Vanger | 0:b86d15c6ba29 | 300 | ea[i].valueSz = attribs[i].valueSz; |
Vanger | 0:b86d15c6ba29 | 301 | attribSz += ea[i].valueSz; |
Vanger | 0:b86d15c6ba29 | 302 | ea[i].valueSetSz = SetSet(attribSz, ea[i].valueSet); |
Vanger | 0:b86d15c6ba29 | 303 | attribSz += ea[i].valueSetSz; |
Vanger | 0:b86d15c6ba29 | 304 | ea[i].oid = attribs[i].oid; |
Vanger | 0:b86d15c6ba29 | 305 | ea[i].oidSz = attribs[i].oidSz; |
Vanger | 0:b86d15c6ba29 | 306 | attribSz += ea[i].oidSz; |
Vanger | 0:b86d15c6ba29 | 307 | ea[i].valueSeqSz = SetSequence(attribSz, ea[i].valueSeq); |
Vanger | 0:b86d15c6ba29 | 308 | attribSz += ea[i].valueSeqSz; |
Vanger | 0:b86d15c6ba29 | 309 | ea[i].totalSz = attribSz; |
Vanger | 0:b86d15c6ba29 | 310 | |
Vanger | 0:b86d15c6ba29 | 311 | allAttribsSz += attribSz; |
Vanger | 0:b86d15c6ba29 | 312 | } |
Vanger | 0:b86d15c6ba29 | 313 | return allAttribsSz; |
Vanger | 0:b86d15c6ba29 | 314 | } |
Vanger | 0:b86d15c6ba29 | 315 | |
Vanger | 0:b86d15c6ba29 | 316 | |
Vanger | 0:b86d15c6ba29 | 317 | static int FlattenAttributes(byte* output, EncodedAttrib* ea, int eaSz) |
Vanger | 0:b86d15c6ba29 | 318 | { |
Vanger | 0:b86d15c6ba29 | 319 | int i, idx; |
Vanger | 0:b86d15c6ba29 | 320 | |
Vanger | 0:b86d15c6ba29 | 321 | idx = 0; |
Vanger | 0:b86d15c6ba29 | 322 | for (i = 0; i < eaSz; i++) { |
Vanger | 0:b86d15c6ba29 | 323 | XMEMCPY(output + idx, ea[i].valueSeq, ea[i].valueSeqSz); |
Vanger | 0:b86d15c6ba29 | 324 | idx += ea[i].valueSeqSz; |
Vanger | 0:b86d15c6ba29 | 325 | XMEMCPY(output + idx, ea[i].oid, ea[i].oidSz); |
Vanger | 0:b86d15c6ba29 | 326 | idx += ea[i].oidSz; |
Vanger | 0:b86d15c6ba29 | 327 | XMEMCPY(output + idx, ea[i].valueSet, ea[i].valueSetSz); |
Vanger | 0:b86d15c6ba29 | 328 | idx += ea[i].valueSetSz; |
Vanger | 0:b86d15c6ba29 | 329 | XMEMCPY(output + idx, ea[i].value, ea[i].valueSz); |
Vanger | 0:b86d15c6ba29 | 330 | idx += ea[i].valueSz; |
Vanger | 0:b86d15c6ba29 | 331 | } |
Vanger | 0:b86d15c6ba29 | 332 | return 0; |
Vanger | 0:b86d15c6ba29 | 333 | } |
Vanger | 0:b86d15c6ba29 | 334 | |
Vanger | 0:b86d15c6ba29 | 335 | |
Vanger | 0:b86d15c6ba29 | 336 | /* build PKCS#7 signedData content type */ |
Vanger | 0:b86d15c6ba29 | 337 | int PKCS7_EncodeSignedData(PKCS7* pkcs7, byte* output, word32 outputSz) |
Vanger | 0:b86d15c6ba29 | 338 | { |
Vanger | 0:b86d15c6ba29 | 339 | static const byte outerOid[] = |
Vanger | 0:b86d15c6ba29 | 340 | { ASN_OBJECT_ID, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, |
Vanger | 0:b86d15c6ba29 | 341 | 0x07, 0x02 }; |
Vanger | 0:b86d15c6ba29 | 342 | static const byte innerOid[] = |
Vanger | 0:b86d15c6ba29 | 343 | { ASN_OBJECT_ID, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, |
Vanger | 0:b86d15c6ba29 | 344 | 0x07, 0x01 }; |
Vanger | 0:b86d15c6ba29 | 345 | |
Vanger | 0:b86d15c6ba29 | 346 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 347 | ESD* esd = NULL; |
Vanger | 0:b86d15c6ba29 | 348 | #else |
Vanger | 0:b86d15c6ba29 | 349 | ESD stack_esd; |
Vanger | 0:b86d15c6ba29 | 350 | ESD* esd = &stack_esd; |
Vanger | 0:b86d15c6ba29 | 351 | #endif |
Vanger | 0:b86d15c6ba29 | 352 | |
Vanger | 0:b86d15c6ba29 | 353 | word32 signerInfoSz = 0; |
Vanger | 0:b86d15c6ba29 | 354 | word32 totalSz = 0; |
Vanger | 0:b86d15c6ba29 | 355 | int idx = 0, ret = 0; |
Vanger | 0:b86d15c6ba29 | 356 | byte* flatSignedAttribs = NULL; |
Vanger | 0:b86d15c6ba29 | 357 | word32 flatSignedAttribsSz = 0; |
Vanger | 0:b86d15c6ba29 | 358 | word32 innerOidSz = sizeof(innerOid); |
Vanger | 0:b86d15c6ba29 | 359 | word32 outerOidSz = sizeof(outerOid); |
Vanger | 0:b86d15c6ba29 | 360 | |
Vanger | 0:b86d15c6ba29 | 361 | if (pkcs7 == NULL || pkcs7->content == NULL || pkcs7->contentSz == 0 || |
Vanger | 0:b86d15c6ba29 | 362 | pkcs7->encryptOID == 0 || pkcs7->hashOID == 0 || pkcs7->rng == 0 || |
Vanger | 0:b86d15c6ba29 | 363 | pkcs7->singleCert == NULL || pkcs7->singleCertSz == 0 || |
Vanger | 0:b86d15c6ba29 | 364 | pkcs7->privateKey == NULL || pkcs7->privateKeySz == 0 || |
Vanger | 0:b86d15c6ba29 | 365 | output == NULL || outputSz == 0) |
Vanger | 0:b86d15c6ba29 | 366 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 367 | |
Vanger | 0:b86d15c6ba29 | 368 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 369 | esd = (ESD*)XMALLOC(sizeof(ESD), NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 370 | if (esd == NULL) |
Vanger | 0:b86d15c6ba29 | 371 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 372 | #endif |
Vanger | 0:b86d15c6ba29 | 373 | |
Vanger | 0:b86d15c6ba29 | 374 | XMEMSET(esd, 0, sizeof(ESD)); |
Vanger | 0:b86d15c6ba29 | 375 | ret = InitSha(&esd->sha); |
Vanger | 0:b86d15c6ba29 | 376 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 377 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 378 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 379 | #endif |
Vanger | 0:b86d15c6ba29 | 380 | return ret; |
Vanger | 0:b86d15c6ba29 | 381 | } |
Vanger | 0:b86d15c6ba29 | 382 | |
Vanger | 0:b86d15c6ba29 | 383 | if (pkcs7->contentSz != 0) |
Vanger | 0:b86d15c6ba29 | 384 | { |
Vanger | 0:b86d15c6ba29 | 385 | ShaUpdate(&esd->sha, pkcs7->content, pkcs7->contentSz); |
Vanger | 0:b86d15c6ba29 | 386 | esd->contentDigest[0] = ASN_OCTET_STRING; |
Vanger | 0:b86d15c6ba29 | 387 | esd->contentDigest[1] = SHA_DIGEST_SIZE; |
Vanger | 0:b86d15c6ba29 | 388 | ShaFinal(&esd->sha, &esd->contentDigest[2]); |
Vanger | 0:b86d15c6ba29 | 389 | } |
Vanger | 0:b86d15c6ba29 | 390 | |
Vanger | 0:b86d15c6ba29 | 391 | esd->innerOctetsSz = SetOctetString(pkcs7->contentSz, esd->innerOctets); |
Vanger | 0:b86d15c6ba29 | 392 | esd->innerContSeqSz = SetExplicit(0, esd->innerOctetsSz + pkcs7->contentSz, |
Vanger | 0:b86d15c6ba29 | 393 | esd->innerContSeq); |
Vanger | 0:b86d15c6ba29 | 394 | esd->contentInfoSeqSz = SetSequence(pkcs7->contentSz + esd->innerOctetsSz + |
Vanger | 0:b86d15c6ba29 | 395 | innerOidSz + esd->innerContSeqSz, |
Vanger | 0:b86d15c6ba29 | 396 | esd->contentInfoSeq); |
Vanger | 0:b86d15c6ba29 | 397 | |
Vanger | 0:b86d15c6ba29 | 398 | esd->issuerSnSz = SetSerialNumber(pkcs7->issuerSn, pkcs7->issuerSnSz, |
Vanger | 0:b86d15c6ba29 | 399 | esd->issuerSn); |
Vanger | 0:b86d15c6ba29 | 400 | signerInfoSz += esd->issuerSnSz; |
Vanger | 0:b86d15c6ba29 | 401 | esd->issuerNameSz = SetSequence(pkcs7->issuerSz, esd->issuerName); |
Vanger | 0:b86d15c6ba29 | 402 | signerInfoSz += esd->issuerNameSz + pkcs7->issuerSz; |
Vanger | 0:b86d15c6ba29 | 403 | esd->issuerSnSeqSz = SetSequence(signerInfoSz, esd->issuerSnSeq); |
Vanger | 0:b86d15c6ba29 | 404 | signerInfoSz += esd->issuerSnSeqSz; |
Vanger | 0:b86d15c6ba29 | 405 | esd->signerVersionSz = SetMyVersion(1, esd->signerVersion, 0); |
Vanger | 0:b86d15c6ba29 | 406 | signerInfoSz += esd->signerVersionSz; |
Vanger | 0:b86d15c6ba29 | 407 | esd->signerDigAlgoIdSz = SetAlgoID(pkcs7->hashOID, esd->signerDigAlgoId, |
Vanger | 0:b86d15c6ba29 | 408 | hashType, 0); |
Vanger | 0:b86d15c6ba29 | 409 | signerInfoSz += esd->signerDigAlgoIdSz; |
Vanger | 0:b86d15c6ba29 | 410 | esd->digEncAlgoIdSz = SetAlgoID(pkcs7->encryptOID, esd->digEncAlgoId, |
Vanger | 0:b86d15c6ba29 | 411 | keyType, 0); |
Vanger | 0:b86d15c6ba29 | 412 | signerInfoSz += esd->digEncAlgoIdSz; |
Vanger | 0:b86d15c6ba29 | 413 | |
Vanger | 0:b86d15c6ba29 | 414 | if (pkcs7->signedAttribsSz != 0) { |
Vanger | 0:b86d15c6ba29 | 415 | byte contentTypeOid[] = |
Vanger | 0:b86d15c6ba29 | 416 | { ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xF7, 0x0d, 0x01, |
Vanger | 0:b86d15c6ba29 | 417 | 0x09, 0x03 }; |
Vanger | 0:b86d15c6ba29 | 418 | byte contentType[] = |
Vanger | 0:b86d15c6ba29 | 419 | { ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, |
Vanger | 0:b86d15c6ba29 | 420 | 0x07, 0x01 }; |
Vanger | 0:b86d15c6ba29 | 421 | byte messageDigestOid[] = |
Vanger | 0:b86d15c6ba29 | 422 | { ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, |
Vanger | 0:b86d15c6ba29 | 423 | 0x09, 0x04 }; |
Vanger | 0:b86d15c6ba29 | 424 | |
Vanger | 0:b86d15c6ba29 | 425 | PKCS7Attrib cannedAttribs[2] = |
Vanger | 0:b86d15c6ba29 | 426 | { |
Vanger | 0:b86d15c6ba29 | 427 | { contentTypeOid, sizeof(contentTypeOid), |
Vanger | 0:b86d15c6ba29 | 428 | contentType, sizeof(contentType) }, |
Vanger | 0:b86d15c6ba29 | 429 | { messageDigestOid, sizeof(messageDigestOid), |
Vanger | 0:b86d15c6ba29 | 430 | esd->contentDigest, sizeof(esd->contentDigest) } |
Vanger | 0:b86d15c6ba29 | 431 | }; |
Vanger | 0:b86d15c6ba29 | 432 | word32 cannedAttribsCount = sizeof(cannedAttribs)/sizeof(PKCS7Attrib); |
Vanger | 0:b86d15c6ba29 | 433 | |
Vanger | 0:b86d15c6ba29 | 434 | esd->signedAttribsCount += cannedAttribsCount; |
Vanger | 0:b86d15c6ba29 | 435 | esd->signedAttribsSz += EncodeAttributes(&esd->signedAttribs[0], 2, |
Vanger | 0:b86d15c6ba29 | 436 | cannedAttribs, cannedAttribsCount); |
Vanger | 0:b86d15c6ba29 | 437 | |
Vanger | 0:b86d15c6ba29 | 438 | esd->signedAttribsCount += pkcs7->signedAttribsSz; |
Vanger | 0:b86d15c6ba29 | 439 | esd->signedAttribsSz += EncodeAttributes(&esd->signedAttribs[2], 4, |
Vanger | 0:b86d15c6ba29 | 440 | pkcs7->signedAttribs, pkcs7->signedAttribsSz); |
Vanger | 0:b86d15c6ba29 | 441 | |
Vanger | 0:b86d15c6ba29 | 442 | flatSignedAttribs = (byte*)XMALLOC(esd->signedAttribsSz, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 443 | flatSignedAttribsSz = esd->signedAttribsSz; |
Vanger | 0:b86d15c6ba29 | 444 | if (flatSignedAttribs == NULL) { |
Vanger | 0:b86d15c6ba29 | 445 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 446 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 447 | #endif |
Vanger | 0:b86d15c6ba29 | 448 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 449 | } |
Vanger | 0:b86d15c6ba29 | 450 | FlattenAttributes(flatSignedAttribs, |
Vanger | 0:b86d15c6ba29 | 451 | esd->signedAttribs, esd->signedAttribsCount); |
Vanger | 0:b86d15c6ba29 | 452 | esd->signedAttribSetSz = SetImplicit(ASN_SET, 0, esd->signedAttribsSz, |
Vanger | 0:b86d15c6ba29 | 453 | esd->signedAttribSet); |
Vanger | 0:b86d15c6ba29 | 454 | } |
Vanger | 0:b86d15c6ba29 | 455 | /* Calculate the final hash and encrypt it. */ |
Vanger | 0:b86d15c6ba29 | 456 | { |
Vanger | 0:b86d15c6ba29 | 457 | int result; |
Vanger | 0:b86d15c6ba29 | 458 | word32 scratch = 0; |
Vanger | 0:b86d15c6ba29 | 459 | |
Vanger | 0:b86d15c6ba29 | 460 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 461 | byte* digestInfo; |
Vanger | 0:b86d15c6ba29 | 462 | RsaKey* privKey; |
Vanger | 0:b86d15c6ba29 | 463 | #else |
Vanger | 0:b86d15c6ba29 | 464 | RsaKey stack_privKey; |
Vanger | 0:b86d15c6ba29 | 465 | RsaKey* privKey = &stack_privKey; |
Vanger | 0:b86d15c6ba29 | 466 | byte digestInfo[MAX_SEQ_SZ + MAX_ALGO_SZ + |
Vanger | 0:b86d15c6ba29 | 467 | MAX_OCTET_STR_SZ + SHA_DIGEST_SIZE]; |
Vanger | 0:b86d15c6ba29 | 468 | #endif |
Vanger | 0:b86d15c6ba29 | 469 | byte digestInfoSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 470 | byte digestStr[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 471 | word32 digestInfoSeqSz, digestStrSz; |
Vanger | 0:b86d15c6ba29 | 472 | int digIdx = 0; |
Vanger | 0:b86d15c6ba29 | 473 | |
Vanger | 0:b86d15c6ba29 | 474 | if (pkcs7->signedAttribsSz != 0) { |
Vanger | 0:b86d15c6ba29 | 475 | byte attribSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 476 | word32 attribSetSz; |
Vanger | 0:b86d15c6ba29 | 477 | |
Vanger | 0:b86d15c6ba29 | 478 | attribSetSz = SetSet(flatSignedAttribsSz, attribSet); |
Vanger | 0:b86d15c6ba29 | 479 | |
Vanger | 0:b86d15c6ba29 | 480 | ret = InitSha(&esd->sha); |
Vanger | 0:b86d15c6ba29 | 481 | if (ret < 0) { |
Vanger | 0:b86d15c6ba29 | 482 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 483 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 484 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 485 | #endif |
Vanger | 0:b86d15c6ba29 | 486 | return ret; |
Vanger | 0:b86d15c6ba29 | 487 | } |
Vanger | 0:b86d15c6ba29 | 488 | ShaUpdate(&esd->sha, attribSet, attribSetSz); |
Vanger | 0:b86d15c6ba29 | 489 | ShaUpdate(&esd->sha, flatSignedAttribs, flatSignedAttribsSz); |
Vanger | 0:b86d15c6ba29 | 490 | } |
Vanger | 0:b86d15c6ba29 | 491 | ShaFinal(&esd->sha, esd->contentAttribsDigest); |
Vanger | 0:b86d15c6ba29 | 492 | |
Vanger | 0:b86d15c6ba29 | 493 | digestStrSz = SetOctetString(SHA_DIGEST_SIZE, digestStr); |
Vanger | 0:b86d15c6ba29 | 494 | digestInfoSeqSz = SetSequence(esd->signerDigAlgoIdSz + |
Vanger | 0:b86d15c6ba29 | 495 | digestStrSz + SHA_DIGEST_SIZE, |
Vanger | 0:b86d15c6ba29 | 496 | digestInfoSeq); |
Vanger | 0:b86d15c6ba29 | 497 | |
Vanger | 0:b86d15c6ba29 | 498 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 499 | digestInfo = (byte*)XMALLOC(MAX_SEQ_SZ + MAX_ALGO_SZ + |
Vanger | 0:b86d15c6ba29 | 500 | MAX_OCTET_STR_SZ + SHA_DIGEST_SIZE, |
Vanger | 0:b86d15c6ba29 | 501 | NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 502 | if (digestInfo == NULL) { |
Vanger | 0:b86d15c6ba29 | 503 | if (pkcs7->signedAttribsSz != 0) |
Vanger | 0:b86d15c6ba29 | 504 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 505 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 506 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 507 | } |
Vanger | 0:b86d15c6ba29 | 508 | #endif |
Vanger | 0:b86d15c6ba29 | 509 | |
Vanger | 0:b86d15c6ba29 | 510 | XMEMCPY(digestInfo + digIdx, digestInfoSeq, digestInfoSeqSz); |
Vanger | 0:b86d15c6ba29 | 511 | digIdx += digestInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 512 | XMEMCPY(digestInfo + digIdx, |
Vanger | 0:b86d15c6ba29 | 513 | esd->signerDigAlgoId, esd->signerDigAlgoIdSz); |
Vanger | 0:b86d15c6ba29 | 514 | digIdx += esd->signerDigAlgoIdSz; |
Vanger | 0:b86d15c6ba29 | 515 | XMEMCPY(digestInfo + digIdx, digestStr, digestStrSz); |
Vanger | 0:b86d15c6ba29 | 516 | digIdx += digestStrSz; |
Vanger | 0:b86d15c6ba29 | 517 | XMEMCPY(digestInfo + digIdx, esd->contentAttribsDigest, |
Vanger | 0:b86d15c6ba29 | 518 | SHA_DIGEST_SIZE); |
Vanger | 0:b86d15c6ba29 | 519 | digIdx += SHA_DIGEST_SIZE; |
Vanger | 0:b86d15c6ba29 | 520 | |
Vanger | 0:b86d15c6ba29 | 521 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 522 | privKey = (RsaKey*)XMALLOC(sizeof(RsaKey), NULL, |
Vanger | 0:b86d15c6ba29 | 523 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 524 | if (privKey == NULL) { |
Vanger | 0:b86d15c6ba29 | 525 | if (pkcs7->signedAttribsSz != 0) |
Vanger | 0:b86d15c6ba29 | 526 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 527 | XFREE(digestInfo, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 528 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 529 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 530 | } |
Vanger | 0:b86d15c6ba29 | 531 | #endif |
Vanger | 0:b86d15c6ba29 | 532 | |
Vanger | 0:b86d15c6ba29 | 533 | result = InitRsaKey(privKey, NULL); |
Vanger | 0:b86d15c6ba29 | 534 | if (result == 0) |
Vanger | 0:b86d15c6ba29 | 535 | result = RsaPrivateKeyDecode(pkcs7->privateKey, &scratch, privKey, |
Vanger | 0:b86d15c6ba29 | 536 | pkcs7->privateKeySz); |
Vanger | 0:b86d15c6ba29 | 537 | if (result < 0) { |
Vanger | 0:b86d15c6ba29 | 538 | if (pkcs7->signedAttribsSz != 0) |
Vanger | 0:b86d15c6ba29 | 539 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 540 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 541 | XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 542 | XFREE(digestInfo, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 543 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 544 | #endif |
Vanger | 0:b86d15c6ba29 | 545 | return PUBLIC_KEY_E; |
Vanger | 0:b86d15c6ba29 | 546 | } |
Vanger | 0:b86d15c6ba29 | 547 | |
Vanger | 0:b86d15c6ba29 | 548 | result = RsaSSL_Sign(digestInfo, digIdx, |
Vanger | 0:b86d15c6ba29 | 549 | esd->encContentDigest, |
Vanger | 0:b86d15c6ba29 | 550 | sizeof(esd->encContentDigest), |
Vanger | 0:b86d15c6ba29 | 551 | privKey, pkcs7->rng); |
Vanger | 0:b86d15c6ba29 | 552 | |
Vanger | 0:b86d15c6ba29 | 553 | FreeRsaKey(privKey); |
Vanger | 0:b86d15c6ba29 | 554 | |
Vanger | 0:b86d15c6ba29 | 555 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 556 | XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 557 | XFREE(digestInfo, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 558 | #endif |
Vanger | 0:b86d15c6ba29 | 559 | |
Vanger | 0:b86d15c6ba29 | 560 | if (result < 0) { |
Vanger | 0:b86d15c6ba29 | 561 | if (pkcs7->signedAttribsSz != 0) |
Vanger | 0:b86d15c6ba29 | 562 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 563 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 564 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 565 | #endif |
Vanger | 0:b86d15c6ba29 | 566 | return result; |
Vanger | 0:b86d15c6ba29 | 567 | } |
Vanger | 0:b86d15c6ba29 | 568 | esd->encContentDigestSz = (word32)result; |
Vanger | 0:b86d15c6ba29 | 569 | } |
Vanger | 0:b86d15c6ba29 | 570 | signerInfoSz += flatSignedAttribsSz + esd->signedAttribSetSz; |
Vanger | 0:b86d15c6ba29 | 571 | |
Vanger | 0:b86d15c6ba29 | 572 | esd->signerDigestSz = SetOctetString(esd->encContentDigestSz, |
Vanger | 0:b86d15c6ba29 | 573 | esd->signerDigest); |
Vanger | 0:b86d15c6ba29 | 574 | signerInfoSz += esd->signerDigestSz + esd->encContentDigestSz; |
Vanger | 0:b86d15c6ba29 | 575 | |
Vanger | 0:b86d15c6ba29 | 576 | esd->signerInfoSeqSz = SetSequence(signerInfoSz, esd->signerInfoSeq); |
Vanger | 0:b86d15c6ba29 | 577 | signerInfoSz += esd->signerInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 578 | esd->signerInfoSetSz = SetSet(signerInfoSz, esd->signerInfoSet); |
Vanger | 0:b86d15c6ba29 | 579 | signerInfoSz += esd->signerInfoSetSz; |
Vanger | 0:b86d15c6ba29 | 580 | |
Vanger | 0:b86d15c6ba29 | 581 | esd->certsSetSz = SetImplicit(ASN_SET, 0, pkcs7->singleCertSz, |
Vanger | 0:b86d15c6ba29 | 582 | esd->certsSet); |
Vanger | 0:b86d15c6ba29 | 583 | |
Vanger | 0:b86d15c6ba29 | 584 | esd->singleDigAlgoIdSz = SetAlgoID(pkcs7->hashOID, esd->singleDigAlgoId, |
Vanger | 0:b86d15c6ba29 | 585 | hashType, 0); |
Vanger | 0:b86d15c6ba29 | 586 | esd->digAlgoIdSetSz = SetSet(esd->singleDigAlgoIdSz, esd->digAlgoIdSet); |
Vanger | 0:b86d15c6ba29 | 587 | |
Vanger | 0:b86d15c6ba29 | 588 | |
Vanger | 0:b86d15c6ba29 | 589 | esd->versionSz = SetMyVersion(1, esd->version, 0); |
Vanger | 0:b86d15c6ba29 | 590 | |
Vanger | 0:b86d15c6ba29 | 591 | totalSz = esd->versionSz + esd->singleDigAlgoIdSz + esd->digAlgoIdSetSz + |
Vanger | 0:b86d15c6ba29 | 592 | esd->contentInfoSeqSz + esd->certsSetSz + pkcs7->singleCertSz + |
Vanger | 0:b86d15c6ba29 | 593 | esd->innerOctetsSz + esd->innerContSeqSz + |
Vanger | 0:b86d15c6ba29 | 594 | innerOidSz + pkcs7->contentSz + |
Vanger | 0:b86d15c6ba29 | 595 | signerInfoSz; |
Vanger | 0:b86d15c6ba29 | 596 | esd->innerSeqSz = SetSequence(totalSz, esd->innerSeq); |
Vanger | 0:b86d15c6ba29 | 597 | totalSz += esd->innerSeqSz; |
Vanger | 0:b86d15c6ba29 | 598 | esd->outerContentSz = SetExplicit(0, totalSz, esd->outerContent); |
Vanger | 0:b86d15c6ba29 | 599 | totalSz += esd->outerContentSz + outerOidSz; |
Vanger | 0:b86d15c6ba29 | 600 | esd->outerSeqSz = SetSequence(totalSz, esd->outerSeq); |
Vanger | 0:b86d15c6ba29 | 601 | totalSz += esd->outerSeqSz; |
Vanger | 0:b86d15c6ba29 | 602 | |
Vanger | 0:b86d15c6ba29 | 603 | if (outputSz < totalSz) { |
Vanger | 0:b86d15c6ba29 | 604 | if (pkcs7->signedAttribsSz != 0) |
Vanger | 0:b86d15c6ba29 | 605 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 606 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 607 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 608 | #endif |
Vanger | 0:b86d15c6ba29 | 609 | return BUFFER_E; |
Vanger | 0:b86d15c6ba29 | 610 | } |
Vanger | 0:b86d15c6ba29 | 611 | |
Vanger | 0:b86d15c6ba29 | 612 | idx = 0; |
Vanger | 0:b86d15c6ba29 | 613 | XMEMCPY(output + idx, esd->outerSeq, esd->outerSeqSz); |
Vanger | 0:b86d15c6ba29 | 614 | idx += esd->outerSeqSz; |
Vanger | 0:b86d15c6ba29 | 615 | XMEMCPY(output + idx, outerOid, outerOidSz); |
Vanger | 0:b86d15c6ba29 | 616 | idx += outerOidSz; |
Vanger | 0:b86d15c6ba29 | 617 | XMEMCPY(output + idx, esd->outerContent, esd->outerContentSz); |
Vanger | 0:b86d15c6ba29 | 618 | idx += esd->outerContentSz; |
Vanger | 0:b86d15c6ba29 | 619 | XMEMCPY(output + idx, esd->innerSeq, esd->innerSeqSz); |
Vanger | 0:b86d15c6ba29 | 620 | idx += esd->innerSeqSz; |
Vanger | 0:b86d15c6ba29 | 621 | XMEMCPY(output + idx, esd->version, esd->versionSz); |
Vanger | 0:b86d15c6ba29 | 622 | idx += esd->versionSz; |
Vanger | 0:b86d15c6ba29 | 623 | XMEMCPY(output + idx, esd->digAlgoIdSet, esd->digAlgoIdSetSz); |
Vanger | 0:b86d15c6ba29 | 624 | idx += esd->digAlgoIdSetSz; |
Vanger | 0:b86d15c6ba29 | 625 | XMEMCPY(output + idx, esd->singleDigAlgoId, esd->singleDigAlgoIdSz); |
Vanger | 0:b86d15c6ba29 | 626 | idx += esd->singleDigAlgoIdSz; |
Vanger | 0:b86d15c6ba29 | 627 | XMEMCPY(output + idx, esd->contentInfoSeq, esd->contentInfoSeqSz); |
Vanger | 0:b86d15c6ba29 | 628 | idx += esd->contentInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 629 | XMEMCPY(output + idx, innerOid, innerOidSz); |
Vanger | 0:b86d15c6ba29 | 630 | idx += innerOidSz; |
Vanger | 0:b86d15c6ba29 | 631 | XMEMCPY(output + idx, esd->innerContSeq, esd->innerContSeqSz); |
Vanger | 0:b86d15c6ba29 | 632 | idx += esd->innerContSeqSz; |
Vanger | 0:b86d15c6ba29 | 633 | XMEMCPY(output + idx, esd->innerOctets, esd->innerOctetsSz); |
Vanger | 0:b86d15c6ba29 | 634 | idx += esd->innerOctetsSz; |
Vanger | 0:b86d15c6ba29 | 635 | XMEMCPY(output + idx, pkcs7->content, pkcs7->contentSz); |
Vanger | 0:b86d15c6ba29 | 636 | idx += pkcs7->contentSz; |
Vanger | 0:b86d15c6ba29 | 637 | XMEMCPY(output + idx, esd->certsSet, esd->certsSetSz); |
Vanger | 0:b86d15c6ba29 | 638 | idx += esd->certsSetSz; |
Vanger | 0:b86d15c6ba29 | 639 | XMEMCPY(output + idx, pkcs7->singleCert, pkcs7->singleCertSz); |
Vanger | 0:b86d15c6ba29 | 640 | idx += pkcs7->singleCertSz; |
Vanger | 0:b86d15c6ba29 | 641 | XMEMCPY(output + idx, esd->signerInfoSet, esd->signerInfoSetSz); |
Vanger | 0:b86d15c6ba29 | 642 | idx += esd->signerInfoSetSz; |
Vanger | 0:b86d15c6ba29 | 643 | XMEMCPY(output + idx, esd->signerInfoSeq, esd->signerInfoSeqSz); |
Vanger | 0:b86d15c6ba29 | 644 | idx += esd->signerInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 645 | XMEMCPY(output + idx, esd->signerVersion, esd->signerVersionSz); |
Vanger | 0:b86d15c6ba29 | 646 | idx += esd->signerVersionSz; |
Vanger | 0:b86d15c6ba29 | 647 | XMEMCPY(output + idx, esd->issuerSnSeq, esd->issuerSnSeqSz); |
Vanger | 0:b86d15c6ba29 | 648 | idx += esd->issuerSnSeqSz; |
Vanger | 0:b86d15c6ba29 | 649 | XMEMCPY(output + idx, esd->issuerName, esd->issuerNameSz); |
Vanger | 0:b86d15c6ba29 | 650 | idx += esd->issuerNameSz; |
Vanger | 0:b86d15c6ba29 | 651 | XMEMCPY(output + idx, pkcs7->issuer, pkcs7->issuerSz); |
Vanger | 0:b86d15c6ba29 | 652 | idx += pkcs7->issuerSz; |
Vanger | 0:b86d15c6ba29 | 653 | XMEMCPY(output + idx, esd->issuerSn, esd->issuerSnSz); |
Vanger | 0:b86d15c6ba29 | 654 | idx += esd->issuerSnSz; |
Vanger | 0:b86d15c6ba29 | 655 | XMEMCPY(output + idx, esd->signerDigAlgoId, esd->signerDigAlgoIdSz); |
Vanger | 0:b86d15c6ba29 | 656 | idx += esd->signerDigAlgoIdSz; |
Vanger | 0:b86d15c6ba29 | 657 | |
Vanger | 0:b86d15c6ba29 | 658 | /* SignerInfo:Attributes */ |
Vanger | 0:b86d15c6ba29 | 659 | if (pkcs7->signedAttribsSz != 0) { |
Vanger | 0:b86d15c6ba29 | 660 | XMEMCPY(output + idx, esd->signedAttribSet, esd->signedAttribSetSz); |
Vanger | 0:b86d15c6ba29 | 661 | idx += esd->signedAttribSetSz; |
Vanger | 0:b86d15c6ba29 | 662 | XMEMCPY(output + idx, flatSignedAttribs, flatSignedAttribsSz); |
Vanger | 0:b86d15c6ba29 | 663 | idx += flatSignedAttribsSz; |
Vanger | 0:b86d15c6ba29 | 664 | XFREE(flatSignedAttribs, 0, NULL); |
Vanger | 0:b86d15c6ba29 | 665 | } |
Vanger | 0:b86d15c6ba29 | 666 | |
Vanger | 0:b86d15c6ba29 | 667 | XMEMCPY(output + idx, esd->digEncAlgoId, esd->digEncAlgoIdSz); |
Vanger | 0:b86d15c6ba29 | 668 | idx += esd->digEncAlgoIdSz; |
Vanger | 0:b86d15c6ba29 | 669 | XMEMCPY(output + idx, esd->signerDigest, esd->signerDigestSz); |
Vanger | 0:b86d15c6ba29 | 670 | idx += esd->signerDigestSz; |
Vanger | 0:b86d15c6ba29 | 671 | XMEMCPY(output + idx, esd->encContentDigest, esd->encContentDigestSz); |
Vanger | 0:b86d15c6ba29 | 672 | idx += esd->encContentDigestSz; |
Vanger | 0:b86d15c6ba29 | 673 | |
Vanger | 0:b86d15c6ba29 | 674 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 675 | XFREE(esd, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 676 | #endif |
Vanger | 0:b86d15c6ba29 | 677 | |
Vanger | 0:b86d15c6ba29 | 678 | return idx; |
Vanger | 0:b86d15c6ba29 | 679 | } |
Vanger | 0:b86d15c6ba29 | 680 | |
Vanger | 0:b86d15c6ba29 | 681 | |
Vanger | 0:b86d15c6ba29 | 682 | /* Finds the certificates in the message and saves it. */ |
Vanger | 0:b86d15c6ba29 | 683 | int PKCS7_VerifySignedData(PKCS7* pkcs7, byte* pkiMsg, word32 pkiMsgSz) |
Vanger | 0:b86d15c6ba29 | 684 | { |
Vanger | 0:b86d15c6ba29 | 685 | word32 idx, contentType; |
Vanger | 0:b86d15c6ba29 | 686 | int length, version, ret; |
Vanger | 0:b86d15c6ba29 | 687 | byte* content = NULL; |
Vanger | 0:b86d15c6ba29 | 688 | byte* sig = NULL; |
Vanger | 0:b86d15c6ba29 | 689 | byte* cert = NULL; |
Vanger | 0:b86d15c6ba29 | 690 | int contentSz = 0, sigSz = 0, certSz = 0; |
Vanger | 0:b86d15c6ba29 | 691 | |
Vanger | 0:b86d15c6ba29 | 692 | if (pkcs7 == NULL || pkiMsg == NULL || pkiMsgSz == 0) |
Vanger | 0:b86d15c6ba29 | 693 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 694 | |
Vanger | 0:b86d15c6ba29 | 695 | idx = 0; |
Vanger | 0:b86d15c6ba29 | 696 | |
Vanger | 0:b86d15c6ba29 | 697 | /* Get the contentInfo sequence */ |
Vanger | 0:b86d15c6ba29 | 698 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 699 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 700 | |
Vanger | 0:b86d15c6ba29 | 701 | /* Get the contentInfo contentType */ |
Vanger | 0:b86d15c6ba29 | 702 | if (GetContentType(pkiMsg, &idx, &contentType, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 703 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 704 | |
Vanger | 0:b86d15c6ba29 | 705 | if (contentType != SIGNED_DATA) { |
Vanger | 0:b86d15c6ba29 | 706 | CYASSL_MSG("PKCS#7 input not of type SignedData"); |
Vanger | 0:b86d15c6ba29 | 707 | return PKCS7_OID_E; |
Vanger | 0:b86d15c6ba29 | 708 | } |
Vanger | 0:b86d15c6ba29 | 709 | |
Vanger | 0:b86d15c6ba29 | 710 | /* get the ContentInfo content */ |
Vanger | 0:b86d15c6ba29 | 711 | if (pkiMsg[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)) |
Vanger | 0:b86d15c6ba29 | 712 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 713 | |
Vanger | 0:b86d15c6ba29 | 714 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 715 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 716 | |
Vanger | 0:b86d15c6ba29 | 717 | /* Get the signedData sequence */ |
Vanger | 0:b86d15c6ba29 | 718 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 719 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 720 | |
Vanger | 0:b86d15c6ba29 | 721 | /* Get the version */ |
Vanger | 0:b86d15c6ba29 | 722 | if (GetMyVersion(pkiMsg, &idx, &version) < 0) |
Vanger | 0:b86d15c6ba29 | 723 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 724 | |
Vanger | 0:b86d15c6ba29 | 725 | if (version != 1) { |
Vanger | 0:b86d15c6ba29 | 726 | CYASSL_MSG("PKCS#7 signedData needs to be of version 1"); |
Vanger | 0:b86d15c6ba29 | 727 | return ASN_VERSION_E; |
Vanger | 0:b86d15c6ba29 | 728 | } |
Vanger | 0:b86d15c6ba29 | 729 | |
Vanger | 0:b86d15c6ba29 | 730 | /* Get the set of DigestAlgorithmIdentifiers */ |
Vanger | 0:b86d15c6ba29 | 731 | if (GetSet(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 732 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 733 | |
Vanger | 0:b86d15c6ba29 | 734 | /* Skip the set. */ |
Vanger | 0:b86d15c6ba29 | 735 | idx += length; |
Vanger | 0:b86d15c6ba29 | 736 | |
Vanger | 0:b86d15c6ba29 | 737 | /* Get the inner ContentInfo sequence */ |
Vanger | 0:b86d15c6ba29 | 738 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 739 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 740 | |
Vanger | 0:b86d15c6ba29 | 741 | /* Get the inner ContentInfo contentType */ |
Vanger | 0:b86d15c6ba29 | 742 | if (GetContentType(pkiMsg, &idx, &contentType, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 743 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 744 | |
Vanger | 0:b86d15c6ba29 | 745 | if (contentType != DATA) { |
Vanger | 0:b86d15c6ba29 | 746 | CYASSL_MSG("PKCS#7 inner input not of type Data"); |
Vanger | 0:b86d15c6ba29 | 747 | return PKCS7_OID_E; |
Vanger | 0:b86d15c6ba29 | 748 | } |
Vanger | 0:b86d15c6ba29 | 749 | |
Vanger | 0:b86d15c6ba29 | 750 | if (pkiMsg[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)) |
Vanger | 0:b86d15c6ba29 | 751 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 752 | |
Vanger | 0:b86d15c6ba29 | 753 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 754 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 755 | |
Vanger | 0:b86d15c6ba29 | 756 | if (pkiMsg[idx++] != ASN_OCTET_STRING) |
Vanger | 0:b86d15c6ba29 | 757 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 758 | |
Vanger | 0:b86d15c6ba29 | 759 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 760 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 761 | |
Vanger | 0:b86d15c6ba29 | 762 | /* Save the inner data as the content. */ |
Vanger | 0:b86d15c6ba29 | 763 | if (length > 0) { |
Vanger | 0:b86d15c6ba29 | 764 | /* Local pointer for calculating hashes later */ |
Vanger | 0:b86d15c6ba29 | 765 | pkcs7->content = content = &pkiMsg[idx]; |
Vanger | 0:b86d15c6ba29 | 766 | pkcs7->contentSz = contentSz = length; |
Vanger | 0:b86d15c6ba29 | 767 | idx += length; |
Vanger | 0:b86d15c6ba29 | 768 | } |
Vanger | 0:b86d15c6ba29 | 769 | |
Vanger | 0:b86d15c6ba29 | 770 | /* Get the implicit[0] set of certificates */ |
Vanger | 0:b86d15c6ba29 | 771 | if (pkiMsg[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)) { |
Vanger | 0:b86d15c6ba29 | 772 | idx++; |
Vanger | 0:b86d15c6ba29 | 773 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 774 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 775 | |
Vanger | 0:b86d15c6ba29 | 776 | if (length > 0) { |
Vanger | 0:b86d15c6ba29 | 777 | /* At this point, idx is at the first certificate in |
Vanger | 0:b86d15c6ba29 | 778 | * a set of certificates. There may be more than one, |
Vanger | 0:b86d15c6ba29 | 779 | * or none, or they may be a PKCS 6 extended |
Vanger | 0:b86d15c6ba29 | 780 | * certificate. We want to save the first cert if it |
Vanger | 0:b86d15c6ba29 | 781 | * is X.509. */ |
Vanger | 0:b86d15c6ba29 | 782 | |
Vanger | 0:b86d15c6ba29 | 783 | word32 certIdx = idx; |
Vanger | 0:b86d15c6ba29 | 784 | |
Vanger | 0:b86d15c6ba29 | 785 | if (pkiMsg[certIdx++] == (ASN_CONSTRUCTED | ASN_SEQUENCE)) { |
Vanger | 0:b86d15c6ba29 | 786 | if (GetLength(pkiMsg, &certIdx, &certSz, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 787 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 788 | |
Vanger | 0:b86d15c6ba29 | 789 | cert = &pkiMsg[idx]; |
Vanger | 0:b86d15c6ba29 | 790 | certSz += (certIdx - idx); |
Vanger | 0:b86d15c6ba29 | 791 | } |
Vanger | 0:b86d15c6ba29 | 792 | PKCS7_InitWithCert(pkcs7, cert, certSz); |
Vanger | 0:b86d15c6ba29 | 793 | } |
Vanger | 0:b86d15c6ba29 | 794 | idx += length; |
Vanger | 0:b86d15c6ba29 | 795 | } |
Vanger | 0:b86d15c6ba29 | 796 | |
Vanger | 0:b86d15c6ba29 | 797 | /* Get the implicit[1] set of crls */ |
Vanger | 0:b86d15c6ba29 | 798 | if (pkiMsg[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1)) { |
Vanger | 0:b86d15c6ba29 | 799 | idx++; |
Vanger | 0:b86d15c6ba29 | 800 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 801 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 802 | |
Vanger | 0:b86d15c6ba29 | 803 | /* Skip the set */ |
Vanger | 0:b86d15c6ba29 | 804 | idx += length; |
Vanger | 0:b86d15c6ba29 | 805 | } |
Vanger | 0:b86d15c6ba29 | 806 | |
Vanger | 0:b86d15c6ba29 | 807 | /* Get the set of signerInfos */ |
Vanger | 0:b86d15c6ba29 | 808 | if (GetSet(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 809 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 810 | |
Vanger | 0:b86d15c6ba29 | 811 | if (length > 0) { |
Vanger | 0:b86d15c6ba29 | 812 | /* Get the sequence of the first signerInfo */ |
Vanger | 0:b86d15c6ba29 | 813 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 814 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 815 | |
Vanger | 0:b86d15c6ba29 | 816 | /* Get the version */ |
Vanger | 0:b86d15c6ba29 | 817 | if (GetMyVersion(pkiMsg, &idx, &version) < 0) |
Vanger | 0:b86d15c6ba29 | 818 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 819 | |
Vanger | 0:b86d15c6ba29 | 820 | if (version != 1) { |
Vanger | 0:b86d15c6ba29 | 821 | CYASSL_MSG("PKCS#7 signerInfo needs to be of version 1"); |
Vanger | 0:b86d15c6ba29 | 822 | return ASN_VERSION_E; |
Vanger | 0:b86d15c6ba29 | 823 | } |
Vanger | 0:b86d15c6ba29 | 824 | |
Vanger | 0:b86d15c6ba29 | 825 | /* Get the sequence of IssuerAndSerialNumber */ |
Vanger | 0:b86d15c6ba29 | 826 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 827 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 828 | |
Vanger | 0:b86d15c6ba29 | 829 | /* Skip it */ |
Vanger | 0:b86d15c6ba29 | 830 | idx += length; |
Vanger | 0:b86d15c6ba29 | 831 | |
Vanger | 0:b86d15c6ba29 | 832 | /* Get the sequence of digestAlgorithm */ |
Vanger | 0:b86d15c6ba29 | 833 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 834 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 835 | |
Vanger | 0:b86d15c6ba29 | 836 | /* Skip it */ |
Vanger | 0:b86d15c6ba29 | 837 | idx += length; |
Vanger | 0:b86d15c6ba29 | 838 | |
Vanger | 0:b86d15c6ba29 | 839 | /* Get the IMPLICIT[0] SET OF signedAttributes */ |
Vanger | 0:b86d15c6ba29 | 840 | if (pkiMsg[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)) { |
Vanger | 0:b86d15c6ba29 | 841 | idx++; |
Vanger | 0:b86d15c6ba29 | 842 | |
Vanger | 0:b86d15c6ba29 | 843 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 844 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 845 | |
Vanger | 0:b86d15c6ba29 | 846 | idx += length; |
Vanger | 0:b86d15c6ba29 | 847 | } |
Vanger | 0:b86d15c6ba29 | 848 | |
Vanger | 0:b86d15c6ba29 | 849 | /* Get the sequence of digestEncryptionAlgorithm */ |
Vanger | 0:b86d15c6ba29 | 850 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 851 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 852 | |
Vanger | 0:b86d15c6ba29 | 853 | /* Skip it */ |
Vanger | 0:b86d15c6ba29 | 854 | idx += length; |
Vanger | 0:b86d15c6ba29 | 855 | |
Vanger | 0:b86d15c6ba29 | 856 | /* Get the signature */ |
Vanger | 0:b86d15c6ba29 | 857 | if (pkiMsg[idx] == ASN_OCTET_STRING) { |
Vanger | 0:b86d15c6ba29 | 858 | idx++; |
Vanger | 0:b86d15c6ba29 | 859 | |
Vanger | 0:b86d15c6ba29 | 860 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 861 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 862 | |
Vanger | 0:b86d15c6ba29 | 863 | /* save pointer and length */ |
Vanger | 0:b86d15c6ba29 | 864 | sig = &pkiMsg[idx]; |
Vanger | 0:b86d15c6ba29 | 865 | sigSz = length; |
Vanger | 0:b86d15c6ba29 | 866 | |
Vanger | 0:b86d15c6ba29 | 867 | idx += length; |
Vanger | 0:b86d15c6ba29 | 868 | } |
Vanger | 0:b86d15c6ba29 | 869 | |
Vanger | 0:b86d15c6ba29 | 870 | pkcs7->content = content; |
Vanger | 0:b86d15c6ba29 | 871 | pkcs7->contentSz = contentSz; |
Vanger | 0:b86d15c6ba29 | 872 | |
Vanger | 0:b86d15c6ba29 | 873 | { |
Vanger | 0:b86d15c6ba29 | 874 | word32 scratch = 0; |
Vanger | 0:b86d15c6ba29 | 875 | int plainSz = 0; |
Vanger | 0:b86d15c6ba29 | 876 | int digestSz = MAX_SEQ_SZ + MAX_ALGO_SZ + |
Vanger | 0:b86d15c6ba29 | 877 | MAX_OCTET_STR_SZ + SHA_DIGEST_SIZE; |
Vanger | 0:b86d15c6ba29 | 878 | |
Vanger | 0:b86d15c6ba29 | 879 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 880 | byte* digest; |
Vanger | 0:b86d15c6ba29 | 881 | RsaKey* key; |
Vanger | 0:b86d15c6ba29 | 882 | |
Vanger | 0:b86d15c6ba29 | 883 | digest = (byte*)XMALLOC(digestSz, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 884 | |
Vanger | 0:b86d15c6ba29 | 885 | if (digest == NULL) |
Vanger | 0:b86d15c6ba29 | 886 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 887 | |
Vanger | 0:b86d15c6ba29 | 888 | key = (RsaKey*)XMALLOC(sizeof(RsaKey), NULL, |
Vanger | 0:b86d15c6ba29 | 889 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 890 | if (key == NULL) { |
Vanger | 0:b86d15c6ba29 | 891 | XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 892 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 893 | } |
Vanger | 0:b86d15c6ba29 | 894 | #else |
Vanger | 0:b86d15c6ba29 | 895 | byte digest[digestSz]; |
Vanger | 0:b86d15c6ba29 | 896 | RsaKey stack_key; |
Vanger | 0:b86d15c6ba29 | 897 | RsaKey* key = &stack_key; |
Vanger | 0:b86d15c6ba29 | 898 | #endif |
Vanger | 0:b86d15c6ba29 | 899 | |
Vanger | 0:b86d15c6ba29 | 900 | XMEMSET(digest, 0, digestSz); |
Vanger | 0:b86d15c6ba29 | 901 | |
Vanger | 0:b86d15c6ba29 | 902 | ret = InitRsaKey(key, NULL); |
Vanger | 0:b86d15c6ba29 | 903 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 904 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 905 | XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 906 | XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 907 | #endif |
Vanger | 0:b86d15c6ba29 | 908 | return ret; |
Vanger | 0:b86d15c6ba29 | 909 | } |
Vanger | 0:b86d15c6ba29 | 910 | if (RsaPublicKeyDecode(pkcs7->publicKey, &scratch, key, |
Vanger | 0:b86d15c6ba29 | 911 | pkcs7->publicKeySz) < 0) { |
Vanger | 0:b86d15c6ba29 | 912 | CYASSL_MSG("ASN RSA key decode error"); |
Vanger | 0:b86d15c6ba29 | 913 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 914 | XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 915 | XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 916 | #endif |
Vanger | 0:b86d15c6ba29 | 917 | return PUBLIC_KEY_E; |
Vanger | 0:b86d15c6ba29 | 918 | } |
Vanger | 0:b86d15c6ba29 | 919 | |
Vanger | 0:b86d15c6ba29 | 920 | plainSz = RsaSSL_Verify(sig, sigSz, digest, digestSz, key); |
Vanger | 0:b86d15c6ba29 | 921 | FreeRsaKey(key); |
Vanger | 0:b86d15c6ba29 | 922 | |
Vanger | 0:b86d15c6ba29 | 923 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 924 | XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 925 | XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 926 | #endif |
Vanger | 0:b86d15c6ba29 | 927 | |
Vanger | 0:b86d15c6ba29 | 928 | if (plainSz < 0) |
Vanger | 0:b86d15c6ba29 | 929 | return plainSz; |
Vanger | 0:b86d15c6ba29 | 930 | } |
Vanger | 0:b86d15c6ba29 | 931 | } |
Vanger | 0:b86d15c6ba29 | 932 | |
Vanger | 0:b86d15c6ba29 | 933 | return 0; |
Vanger | 0:b86d15c6ba29 | 934 | } |
Vanger | 0:b86d15c6ba29 | 935 | |
Vanger | 0:b86d15c6ba29 | 936 | |
Vanger | 0:b86d15c6ba29 | 937 | /* create ASN.1 fomatted RecipientInfo structure, returns sequence size */ |
Vanger | 0:b86d15c6ba29 | 938 | CYASSL_LOCAL int CreateRecipientInfo(const byte* cert, word32 certSz, |
Vanger | 0:b86d15c6ba29 | 939 | int keyEncAlgo, int blockKeySz, |
Vanger | 0:b86d15c6ba29 | 940 | RNG* rng, byte* contentKeyPlain, |
Vanger | 0:b86d15c6ba29 | 941 | byte* contentKeyEnc, |
Vanger | 0:b86d15c6ba29 | 942 | int* keyEncSz, byte* out, word32 outSz) |
Vanger | 0:b86d15c6ba29 | 943 | { |
Vanger | 0:b86d15c6ba29 | 944 | word32 idx = 0; |
Vanger | 0:b86d15c6ba29 | 945 | int ret = 0, totalSz = 0; |
Vanger | 0:b86d15c6ba29 | 946 | int verSz, issuerSz, snSz, keyEncAlgSz; |
Vanger | 0:b86d15c6ba29 | 947 | int issuerSeqSz, recipSeqSz, issuerSerialSeqSz; |
Vanger | 0:b86d15c6ba29 | 948 | int encKeyOctetStrSz; |
Vanger | 0:b86d15c6ba29 | 949 | |
Vanger | 0:b86d15c6ba29 | 950 | byte ver[MAX_VERSION_SZ]; |
Vanger | 0:b86d15c6ba29 | 951 | byte issuerSerialSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 952 | byte recipSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 953 | byte issuerSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 954 | byte encKeyOctetStr[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 955 | |
Vanger | 0:b86d15c6ba29 | 956 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 957 | byte *serial; |
Vanger | 0:b86d15c6ba29 | 958 | byte *keyAlgArray; |
Vanger | 0:b86d15c6ba29 | 959 | |
Vanger | 0:b86d15c6ba29 | 960 | RsaKey* pubKey; |
Vanger | 0:b86d15c6ba29 | 961 | DecodedCert* decoded; |
Vanger | 0:b86d15c6ba29 | 962 | |
Vanger | 0:b86d15c6ba29 | 963 | serial = (byte*)XMALLOC(MAX_SN_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 964 | keyAlgArray = (byte*)XMALLOC(MAX_SN_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 965 | decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, |
Vanger | 0:b86d15c6ba29 | 966 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 967 | |
Vanger | 0:b86d15c6ba29 | 968 | if (decoded == NULL || serial == NULL || keyAlgArray == NULL) { |
Vanger | 0:b86d15c6ba29 | 969 | if (serial) XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 970 | if (keyAlgArray) XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 971 | if (decoded) XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 972 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 973 | } |
Vanger | 0:b86d15c6ba29 | 974 | |
Vanger | 0:b86d15c6ba29 | 975 | #else |
Vanger | 0:b86d15c6ba29 | 976 | byte serial[MAX_SN_SZ]; |
Vanger | 0:b86d15c6ba29 | 977 | byte keyAlgArray[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 978 | |
Vanger | 0:b86d15c6ba29 | 979 | RsaKey stack_pubKey; |
Vanger | 0:b86d15c6ba29 | 980 | RsaKey* pubKey = &stack_pubKey; |
Vanger | 0:b86d15c6ba29 | 981 | DecodedCert stack_decoded; |
Vanger | 0:b86d15c6ba29 | 982 | DecodedCert* decoded = &stack_decoded; |
Vanger | 0:b86d15c6ba29 | 983 | #endif |
Vanger | 0:b86d15c6ba29 | 984 | |
Vanger | 0:b86d15c6ba29 | 985 | InitDecodedCert(decoded, (byte*)cert, certSz, 0); |
Vanger | 0:b86d15c6ba29 | 986 | ret = ParseCert(decoded, CA_TYPE, NO_VERIFY, 0); |
Vanger | 0:b86d15c6ba29 | 987 | if (ret < 0) { |
Vanger | 0:b86d15c6ba29 | 988 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 989 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 990 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 991 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 992 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 993 | #endif |
Vanger | 0:b86d15c6ba29 | 994 | return ret; |
Vanger | 0:b86d15c6ba29 | 995 | } |
Vanger | 0:b86d15c6ba29 | 996 | |
Vanger | 0:b86d15c6ba29 | 997 | /* version */ |
Vanger | 0:b86d15c6ba29 | 998 | verSz = SetMyVersion(0, ver, 0); |
Vanger | 0:b86d15c6ba29 | 999 | |
Vanger | 0:b86d15c6ba29 | 1000 | /* IssuerAndSerialNumber */ |
Vanger | 0:b86d15c6ba29 | 1001 | if (decoded->issuerRaw == NULL || decoded->issuerRawLen == 0) { |
Vanger | 0:b86d15c6ba29 | 1002 | CYASSL_MSG("DecodedCert lacks raw issuer pointer and length"); |
Vanger | 0:b86d15c6ba29 | 1003 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1004 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1005 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1006 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1007 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1008 | #endif |
Vanger | 0:b86d15c6ba29 | 1009 | return -1; |
Vanger | 0:b86d15c6ba29 | 1010 | } |
Vanger | 0:b86d15c6ba29 | 1011 | issuerSz = decoded->issuerRawLen; |
Vanger | 0:b86d15c6ba29 | 1012 | issuerSeqSz = SetSequence(issuerSz, issuerSeq); |
Vanger | 0:b86d15c6ba29 | 1013 | |
Vanger | 0:b86d15c6ba29 | 1014 | if (decoded->serial == NULL || decoded->serialSz == 0) { |
Vanger | 0:b86d15c6ba29 | 1015 | CYASSL_MSG("DecodedCert missing serial number"); |
Vanger | 0:b86d15c6ba29 | 1016 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1017 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1018 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1019 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1020 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1021 | #endif |
Vanger | 0:b86d15c6ba29 | 1022 | return -1; |
Vanger | 0:b86d15c6ba29 | 1023 | } |
Vanger | 0:b86d15c6ba29 | 1024 | snSz = SetSerialNumber(decoded->serial, decoded->serialSz, serial); |
Vanger | 0:b86d15c6ba29 | 1025 | |
Vanger | 0:b86d15c6ba29 | 1026 | issuerSerialSeqSz = SetSequence(issuerSeqSz + issuerSz + snSz, |
Vanger | 0:b86d15c6ba29 | 1027 | issuerSerialSeq); |
Vanger | 0:b86d15c6ba29 | 1028 | |
Vanger | 0:b86d15c6ba29 | 1029 | /* KeyEncryptionAlgorithmIdentifier, only support RSA now */ |
Vanger | 0:b86d15c6ba29 | 1030 | if (keyEncAlgo != RSAk) { |
Vanger | 0:b86d15c6ba29 | 1031 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1032 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1033 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1034 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1035 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1036 | #endif |
Vanger | 0:b86d15c6ba29 | 1037 | return ALGO_ID_E; |
Vanger | 0:b86d15c6ba29 | 1038 | } |
Vanger | 0:b86d15c6ba29 | 1039 | |
Vanger | 0:b86d15c6ba29 | 1040 | keyEncAlgSz = SetAlgoID(keyEncAlgo, keyAlgArray, keyType, 0); |
Vanger | 0:b86d15c6ba29 | 1041 | if (keyEncAlgSz == 0) { |
Vanger | 0:b86d15c6ba29 | 1042 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1043 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1044 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1045 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1046 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1047 | #endif |
Vanger | 0:b86d15c6ba29 | 1048 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1049 | } |
Vanger | 0:b86d15c6ba29 | 1050 | |
Vanger | 0:b86d15c6ba29 | 1051 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1052 | pubKey = (RsaKey*)XMALLOC(sizeof(RsaKey), NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1053 | if (pubKey == NULL) { |
Vanger | 0:b86d15c6ba29 | 1054 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1055 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1056 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1057 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1058 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1059 | } |
Vanger | 0:b86d15c6ba29 | 1060 | #endif |
Vanger | 0:b86d15c6ba29 | 1061 | |
Vanger | 0:b86d15c6ba29 | 1062 | /* EncryptedKey */ |
Vanger | 0:b86d15c6ba29 | 1063 | ret = InitRsaKey(pubKey, 0); |
Vanger | 0:b86d15c6ba29 | 1064 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1065 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1066 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1067 | XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1068 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1069 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1070 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1071 | #endif |
Vanger | 0:b86d15c6ba29 | 1072 | return ret; |
Vanger | 0:b86d15c6ba29 | 1073 | } |
Vanger | 0:b86d15c6ba29 | 1074 | |
Vanger | 0:b86d15c6ba29 | 1075 | if (RsaPublicKeyDecode(decoded->publicKey, &idx, pubKey, |
Vanger | 0:b86d15c6ba29 | 1076 | decoded->pubKeySize) < 0) { |
Vanger | 0:b86d15c6ba29 | 1077 | CYASSL_MSG("ASN RSA key decode error"); |
Vanger | 0:b86d15c6ba29 | 1078 | FreeRsaKey(pubKey); |
Vanger | 0:b86d15c6ba29 | 1079 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1080 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1081 | XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1082 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1083 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1084 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1085 | #endif |
Vanger | 0:b86d15c6ba29 | 1086 | return PUBLIC_KEY_E; |
Vanger | 0:b86d15c6ba29 | 1087 | } |
Vanger | 0:b86d15c6ba29 | 1088 | |
Vanger | 0:b86d15c6ba29 | 1089 | *keyEncSz = RsaPublicEncrypt(contentKeyPlain, blockKeySz, contentKeyEnc, |
Vanger | 0:b86d15c6ba29 | 1090 | MAX_ENCRYPTED_KEY_SZ, pubKey, rng); |
Vanger | 0:b86d15c6ba29 | 1091 | FreeRsaKey(pubKey); |
Vanger | 0:b86d15c6ba29 | 1092 | |
Vanger | 0:b86d15c6ba29 | 1093 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1094 | XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1095 | #endif |
Vanger | 0:b86d15c6ba29 | 1096 | |
Vanger | 0:b86d15c6ba29 | 1097 | if (*keyEncSz < 0) { |
Vanger | 0:b86d15c6ba29 | 1098 | CYASSL_MSG("RSA Public Encrypt failed"); |
Vanger | 0:b86d15c6ba29 | 1099 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1100 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1101 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1102 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1103 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1104 | #endif |
Vanger | 0:b86d15c6ba29 | 1105 | return *keyEncSz; |
Vanger | 0:b86d15c6ba29 | 1106 | } |
Vanger | 0:b86d15c6ba29 | 1107 | |
Vanger | 0:b86d15c6ba29 | 1108 | encKeyOctetStrSz = SetOctetString(*keyEncSz, encKeyOctetStr); |
Vanger | 0:b86d15c6ba29 | 1109 | |
Vanger | 0:b86d15c6ba29 | 1110 | /* RecipientInfo */ |
Vanger | 0:b86d15c6ba29 | 1111 | recipSeqSz = SetSequence(verSz + issuerSerialSeqSz + issuerSeqSz + |
Vanger | 0:b86d15c6ba29 | 1112 | issuerSz + snSz + keyEncAlgSz + encKeyOctetStrSz + |
Vanger | 0:b86d15c6ba29 | 1113 | *keyEncSz, recipSeq); |
Vanger | 0:b86d15c6ba29 | 1114 | |
Vanger | 0:b86d15c6ba29 | 1115 | if (recipSeqSz + verSz + issuerSerialSeqSz + issuerSeqSz + snSz + |
Vanger | 0:b86d15c6ba29 | 1116 | keyEncAlgSz + encKeyOctetStrSz + *keyEncSz > (int)outSz) { |
Vanger | 0:b86d15c6ba29 | 1117 | CYASSL_MSG("RecipientInfo output buffer too small"); |
Vanger | 0:b86d15c6ba29 | 1118 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1119 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1120 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1121 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1122 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1123 | #endif |
Vanger | 0:b86d15c6ba29 | 1124 | return BUFFER_E; |
Vanger | 0:b86d15c6ba29 | 1125 | } |
Vanger | 0:b86d15c6ba29 | 1126 | |
Vanger | 0:b86d15c6ba29 | 1127 | XMEMCPY(out + totalSz, recipSeq, recipSeqSz); |
Vanger | 0:b86d15c6ba29 | 1128 | totalSz += recipSeqSz; |
Vanger | 0:b86d15c6ba29 | 1129 | XMEMCPY(out + totalSz, ver, verSz); |
Vanger | 0:b86d15c6ba29 | 1130 | totalSz += verSz; |
Vanger | 0:b86d15c6ba29 | 1131 | XMEMCPY(out + totalSz, issuerSerialSeq, issuerSerialSeqSz); |
Vanger | 0:b86d15c6ba29 | 1132 | totalSz += issuerSerialSeqSz; |
Vanger | 0:b86d15c6ba29 | 1133 | XMEMCPY(out + totalSz, issuerSeq, issuerSeqSz); |
Vanger | 0:b86d15c6ba29 | 1134 | totalSz += issuerSeqSz; |
Vanger | 0:b86d15c6ba29 | 1135 | XMEMCPY(out + totalSz, decoded->issuerRaw, issuerSz); |
Vanger | 0:b86d15c6ba29 | 1136 | totalSz += issuerSz; |
Vanger | 0:b86d15c6ba29 | 1137 | XMEMCPY(out + totalSz, serial, snSz); |
Vanger | 0:b86d15c6ba29 | 1138 | totalSz += snSz; |
Vanger | 0:b86d15c6ba29 | 1139 | XMEMCPY(out + totalSz, keyAlgArray, keyEncAlgSz); |
Vanger | 0:b86d15c6ba29 | 1140 | totalSz += keyEncAlgSz; |
Vanger | 0:b86d15c6ba29 | 1141 | XMEMCPY(out + totalSz, encKeyOctetStr, encKeyOctetStrSz); |
Vanger | 0:b86d15c6ba29 | 1142 | totalSz += encKeyOctetStrSz; |
Vanger | 0:b86d15c6ba29 | 1143 | XMEMCPY(out + totalSz, contentKeyEnc, *keyEncSz); |
Vanger | 0:b86d15c6ba29 | 1144 | totalSz += *keyEncSz; |
Vanger | 0:b86d15c6ba29 | 1145 | |
Vanger | 0:b86d15c6ba29 | 1146 | FreeDecodedCert(decoded); |
Vanger | 0:b86d15c6ba29 | 1147 | |
Vanger | 0:b86d15c6ba29 | 1148 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1149 | XFREE(serial, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1150 | XFREE(keyAlgArray, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1151 | XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1152 | #endif |
Vanger | 0:b86d15c6ba29 | 1153 | |
Vanger | 0:b86d15c6ba29 | 1154 | return totalSz; |
Vanger | 0:b86d15c6ba29 | 1155 | } |
Vanger | 0:b86d15c6ba29 | 1156 | |
Vanger | 0:b86d15c6ba29 | 1157 | |
Vanger | 0:b86d15c6ba29 | 1158 | /* build PKCS#7 envelopedData content type, return enveloped size */ |
Vanger | 0:b86d15c6ba29 | 1159 | int PKCS7_EncodeEnvelopedData(PKCS7* pkcs7, byte* output, word32 outputSz) |
Vanger | 0:b86d15c6ba29 | 1160 | { |
Vanger | 0:b86d15c6ba29 | 1161 | int i, ret = 0, idx = 0; |
Vanger | 0:b86d15c6ba29 | 1162 | int totalSz = 0, padSz = 0, desOutSz = 0; |
Vanger | 0:b86d15c6ba29 | 1163 | |
Vanger | 0:b86d15c6ba29 | 1164 | int contentInfoSeqSz, outerContentTypeSz, outerContentSz; |
Vanger | 0:b86d15c6ba29 | 1165 | byte contentInfoSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 1166 | byte outerContentType[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 1167 | byte outerContent[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 1168 | |
Vanger | 0:b86d15c6ba29 | 1169 | int envDataSeqSz, verSz; |
Vanger | 0:b86d15c6ba29 | 1170 | byte envDataSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 1171 | byte ver[MAX_VERSION_SZ]; |
Vanger | 0:b86d15c6ba29 | 1172 | |
Vanger | 0:b86d15c6ba29 | 1173 | RNG rng; |
Vanger | 0:b86d15c6ba29 | 1174 | int contentKeyEncSz, blockKeySz; |
Vanger | 0:b86d15c6ba29 | 1175 | int dynamicFlag = 0; |
Vanger | 0:b86d15c6ba29 | 1176 | byte contentKeyPlain[MAX_CONTENT_KEY_LEN]; |
Vanger | 0:b86d15c6ba29 | 1177 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1178 | byte* contentKeyEnc; |
Vanger | 0:b86d15c6ba29 | 1179 | #else |
Vanger | 0:b86d15c6ba29 | 1180 | byte contentKeyEnc[MAX_ENCRYPTED_KEY_SZ]; |
Vanger | 0:b86d15c6ba29 | 1181 | #endif |
Vanger | 0:b86d15c6ba29 | 1182 | byte* plain; |
Vanger | 0:b86d15c6ba29 | 1183 | byte* encryptedContent; |
Vanger | 0:b86d15c6ba29 | 1184 | |
Vanger | 0:b86d15c6ba29 | 1185 | int recipSz, recipSetSz; |
Vanger | 0:b86d15c6ba29 | 1186 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1187 | byte* recip; |
Vanger | 0:b86d15c6ba29 | 1188 | #else |
Vanger | 0:b86d15c6ba29 | 1189 | byte recip[MAX_RECIP_SZ]; |
Vanger | 0:b86d15c6ba29 | 1190 | #endif |
Vanger | 0:b86d15c6ba29 | 1191 | byte recipSet[MAX_SET_SZ]; |
Vanger | 0:b86d15c6ba29 | 1192 | |
Vanger | 0:b86d15c6ba29 | 1193 | int encContentOctetSz, encContentSeqSz, contentTypeSz; |
Vanger | 0:b86d15c6ba29 | 1194 | int contentEncAlgoSz, ivOctetStringSz; |
Vanger | 0:b86d15c6ba29 | 1195 | byte encContentSeq[MAX_SEQ_SZ]; |
Vanger | 0:b86d15c6ba29 | 1196 | byte contentType[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 1197 | byte contentEncAlgo[MAX_ALGO_SZ]; |
Vanger | 0:b86d15c6ba29 | 1198 | byte tmpIv[DES_BLOCK_SIZE]; |
Vanger | 0:b86d15c6ba29 | 1199 | byte ivOctetString[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 1200 | byte encContentOctet[MAX_OCTET_STR_SZ]; |
Vanger | 0:b86d15c6ba29 | 1201 | |
Vanger | 0:b86d15c6ba29 | 1202 | if (pkcs7 == NULL || pkcs7->content == NULL || pkcs7->contentSz == 0 || |
Vanger | 0:b86d15c6ba29 | 1203 | pkcs7->encryptOID == 0 || pkcs7->singleCert == NULL) |
Vanger | 0:b86d15c6ba29 | 1204 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1205 | |
Vanger | 0:b86d15c6ba29 | 1206 | if (output == NULL || outputSz == 0) |
Vanger | 0:b86d15c6ba29 | 1207 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1208 | |
Vanger | 0:b86d15c6ba29 | 1209 | /* PKCS#7 only supports DES, 3DES for now */ |
Vanger | 0:b86d15c6ba29 | 1210 | switch (pkcs7->encryptOID) { |
Vanger | 0:b86d15c6ba29 | 1211 | case DESb: |
Vanger | 0:b86d15c6ba29 | 1212 | blockKeySz = DES_KEYLEN; |
Vanger | 0:b86d15c6ba29 | 1213 | break; |
Vanger | 0:b86d15c6ba29 | 1214 | |
Vanger | 0:b86d15c6ba29 | 1215 | case DES3b: |
Vanger | 0:b86d15c6ba29 | 1216 | blockKeySz = DES3_KEYLEN; |
Vanger | 0:b86d15c6ba29 | 1217 | break; |
Vanger | 0:b86d15c6ba29 | 1218 | |
Vanger | 0:b86d15c6ba29 | 1219 | default: |
Vanger | 0:b86d15c6ba29 | 1220 | CYASSL_MSG("Unsupported content cipher type"); |
Vanger | 0:b86d15c6ba29 | 1221 | return ALGO_ID_E; |
Vanger | 0:b86d15c6ba29 | 1222 | }; |
Vanger | 0:b86d15c6ba29 | 1223 | |
Vanger | 0:b86d15c6ba29 | 1224 | /* outer content type */ |
Vanger | 0:b86d15c6ba29 | 1225 | outerContentTypeSz = SetContentType(ENVELOPED_DATA, outerContentType); |
Vanger | 0:b86d15c6ba29 | 1226 | |
Vanger | 0:b86d15c6ba29 | 1227 | /* version, defined as 0 in RFC 2315 */ |
Vanger | 0:b86d15c6ba29 | 1228 | verSz = SetMyVersion(0, ver, 0); |
Vanger | 0:b86d15c6ba29 | 1229 | |
Vanger | 0:b86d15c6ba29 | 1230 | /* generate random content encryption key */ |
Vanger | 0:b86d15c6ba29 | 1231 | ret = InitRng(&rng); |
Vanger | 0:b86d15c6ba29 | 1232 | if (ret != 0) |
Vanger | 0:b86d15c6ba29 | 1233 | return ret; |
Vanger | 0:b86d15c6ba29 | 1234 | |
Vanger | 0:b86d15c6ba29 | 1235 | ret = RNG_GenerateBlock(&rng, contentKeyPlain, blockKeySz); |
Vanger | 0:b86d15c6ba29 | 1236 | if (ret != 0) |
Vanger | 0:b86d15c6ba29 | 1237 | return ret; |
Vanger | 0:b86d15c6ba29 | 1238 | |
Vanger | 0:b86d15c6ba29 | 1239 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1240 | recip = (byte*)XMALLOC(MAX_RECIP_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1241 | contentKeyEnc = (byte*)XMALLOC(MAX_ENCRYPTED_KEY_SZ, NULL, |
Vanger | 0:b86d15c6ba29 | 1242 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1243 | if (contentKeyEnc == NULL || recip == NULL) { |
Vanger | 0:b86d15c6ba29 | 1244 | if (recip) XFREE(recip, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1245 | if (contentKeyEnc) XFREE(contentKeyEnc, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1246 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1247 | } |
Vanger | 0:b86d15c6ba29 | 1248 | |
Vanger | 0:b86d15c6ba29 | 1249 | #endif |
Vanger | 0:b86d15c6ba29 | 1250 | |
Vanger | 0:b86d15c6ba29 | 1251 | /* build RecipientInfo, only handle 1 for now */ |
Vanger | 0:b86d15c6ba29 | 1252 | recipSz = CreateRecipientInfo(pkcs7->singleCert, pkcs7->singleCertSz, RSAk, |
Vanger | 0:b86d15c6ba29 | 1253 | blockKeySz, &rng, contentKeyPlain, |
Vanger | 0:b86d15c6ba29 | 1254 | contentKeyEnc, &contentKeyEncSz, recip, |
Vanger | 0:b86d15c6ba29 | 1255 | MAX_RECIP_SZ); |
Vanger | 0:b86d15c6ba29 | 1256 | |
Vanger | 0:b86d15c6ba29 | 1257 | XMEMSET(contentKeyEnc, 0, MAX_ENCRYPTED_KEY_SZ); |
Vanger | 0:b86d15c6ba29 | 1258 | |
Vanger | 0:b86d15c6ba29 | 1259 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1260 | XFREE(contentKeyEnc, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1261 | #endif |
Vanger | 0:b86d15c6ba29 | 1262 | |
Vanger | 0:b86d15c6ba29 | 1263 | if (recipSz < 0) { |
Vanger | 0:b86d15c6ba29 | 1264 | CYASSL_MSG("Failed to create RecipientInfo"); |
Vanger | 0:b86d15c6ba29 | 1265 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1266 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1267 | #endif |
Vanger | 0:b86d15c6ba29 | 1268 | return recipSz; |
Vanger | 0:b86d15c6ba29 | 1269 | } |
Vanger | 0:b86d15c6ba29 | 1270 | recipSetSz = SetSet(recipSz, recipSet); |
Vanger | 0:b86d15c6ba29 | 1271 | |
Vanger | 0:b86d15c6ba29 | 1272 | /* generate IV for block cipher */ |
Vanger | 0:b86d15c6ba29 | 1273 | ret = RNG_GenerateBlock(&rng, tmpIv, DES_BLOCK_SIZE); |
Vanger | 0:b86d15c6ba29 | 1274 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1275 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1276 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1277 | #endif |
Vanger | 0:b86d15c6ba29 | 1278 | return ret; |
Vanger | 0:b86d15c6ba29 | 1279 | } |
Vanger | 0:b86d15c6ba29 | 1280 | |
Vanger | 0:b86d15c6ba29 | 1281 | /* EncryptedContentInfo */ |
Vanger | 0:b86d15c6ba29 | 1282 | contentTypeSz = SetContentType(pkcs7->contentOID, contentType); |
Vanger | 0:b86d15c6ba29 | 1283 | if (contentTypeSz == 0) { |
Vanger | 0:b86d15c6ba29 | 1284 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1285 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1286 | #endif |
Vanger | 0:b86d15c6ba29 | 1287 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1288 | } |
Vanger | 0:b86d15c6ba29 | 1289 | |
Vanger | 0:b86d15c6ba29 | 1290 | /* allocate encrypted content buffer, pad if necessary, PKCS#7 padding */ |
Vanger | 0:b86d15c6ba29 | 1291 | padSz = DES_BLOCK_SIZE - (pkcs7->contentSz % DES_BLOCK_SIZE); |
Vanger | 0:b86d15c6ba29 | 1292 | desOutSz = pkcs7->contentSz + padSz; |
Vanger | 0:b86d15c6ba29 | 1293 | |
Vanger | 0:b86d15c6ba29 | 1294 | if (padSz != 0) { |
Vanger | 0:b86d15c6ba29 | 1295 | plain = (byte*)XMALLOC(desOutSz, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1296 | if (plain == NULL) { |
Vanger | 0:b86d15c6ba29 | 1297 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1298 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1299 | #endif |
Vanger | 0:b86d15c6ba29 | 1300 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1301 | } |
Vanger | 0:b86d15c6ba29 | 1302 | XMEMCPY(plain, pkcs7->content, pkcs7->contentSz); |
Vanger | 0:b86d15c6ba29 | 1303 | dynamicFlag = 1; |
Vanger | 0:b86d15c6ba29 | 1304 | |
Vanger | 0:b86d15c6ba29 | 1305 | for (i = 0; i < padSz; i++) { |
Vanger | 0:b86d15c6ba29 | 1306 | plain[pkcs7->contentSz + i] = padSz; |
Vanger | 0:b86d15c6ba29 | 1307 | } |
Vanger | 0:b86d15c6ba29 | 1308 | |
Vanger | 0:b86d15c6ba29 | 1309 | } else { |
Vanger | 0:b86d15c6ba29 | 1310 | plain = pkcs7->content; |
Vanger | 0:b86d15c6ba29 | 1311 | desOutSz = pkcs7->contentSz; |
Vanger | 0:b86d15c6ba29 | 1312 | } |
Vanger | 0:b86d15c6ba29 | 1313 | |
Vanger | 0:b86d15c6ba29 | 1314 | encryptedContent = (byte*)XMALLOC(desOutSz, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1315 | if (encryptedContent == NULL) { |
Vanger | 0:b86d15c6ba29 | 1316 | if (dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 1317 | XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1318 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1319 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1320 | #endif |
Vanger | 0:b86d15c6ba29 | 1321 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1322 | } |
Vanger | 0:b86d15c6ba29 | 1323 | |
Vanger | 0:b86d15c6ba29 | 1324 | /* put together IV OCTET STRING */ |
Vanger | 0:b86d15c6ba29 | 1325 | ivOctetStringSz = SetOctetString(DES_BLOCK_SIZE, ivOctetString); |
Vanger | 0:b86d15c6ba29 | 1326 | |
Vanger | 0:b86d15c6ba29 | 1327 | /* build up our ContentEncryptionAlgorithmIdentifier sequence, |
Vanger | 0:b86d15c6ba29 | 1328 | * adding (ivOctetStringSz + DES_BLOCK_SIZE) for IV OCTET STRING */ |
Vanger | 0:b86d15c6ba29 | 1329 | contentEncAlgoSz = SetAlgoID(pkcs7->encryptOID, contentEncAlgo, |
Vanger | 0:b86d15c6ba29 | 1330 | blkType, ivOctetStringSz + DES_BLOCK_SIZE); |
Vanger | 0:b86d15c6ba29 | 1331 | |
Vanger | 0:b86d15c6ba29 | 1332 | if (contentEncAlgoSz == 0) { |
Vanger | 0:b86d15c6ba29 | 1333 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1334 | if (dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 1335 | XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1336 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1337 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1338 | #endif |
Vanger | 0:b86d15c6ba29 | 1339 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1340 | } |
Vanger | 0:b86d15c6ba29 | 1341 | |
Vanger | 0:b86d15c6ba29 | 1342 | /* encrypt content */ |
Vanger | 0:b86d15c6ba29 | 1343 | if (pkcs7->encryptOID == DESb) { |
Vanger | 0:b86d15c6ba29 | 1344 | Des des; |
Vanger | 0:b86d15c6ba29 | 1345 | |
Vanger | 0:b86d15c6ba29 | 1346 | ret = Des_SetKey(&des, contentKeyPlain, tmpIv, DES_ENCRYPTION); |
Vanger | 0:b86d15c6ba29 | 1347 | |
Vanger | 0:b86d15c6ba29 | 1348 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1349 | Des_CbcEncrypt(&des, encryptedContent, plain, desOutSz); |
Vanger | 0:b86d15c6ba29 | 1350 | |
Vanger | 0:b86d15c6ba29 | 1351 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1352 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1353 | if (dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 1354 | XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1355 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1356 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1357 | #endif |
Vanger | 0:b86d15c6ba29 | 1358 | return ret; |
Vanger | 0:b86d15c6ba29 | 1359 | } |
Vanger | 0:b86d15c6ba29 | 1360 | } |
Vanger | 0:b86d15c6ba29 | 1361 | else if (pkcs7->encryptOID == DES3b) { |
Vanger | 0:b86d15c6ba29 | 1362 | Des3 des3; |
Vanger | 0:b86d15c6ba29 | 1363 | |
Vanger | 0:b86d15c6ba29 | 1364 | ret = Des3_SetKey(&des3, contentKeyPlain, tmpIv, DES_ENCRYPTION); |
Vanger | 0:b86d15c6ba29 | 1365 | |
Vanger | 0:b86d15c6ba29 | 1366 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1367 | ret = Des3_CbcEncrypt(&des3, encryptedContent, plain, desOutSz); |
Vanger | 0:b86d15c6ba29 | 1368 | |
Vanger | 0:b86d15c6ba29 | 1369 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1370 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1371 | if (dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 1372 | XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1373 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1374 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1375 | #endif |
Vanger | 0:b86d15c6ba29 | 1376 | return ret; |
Vanger | 0:b86d15c6ba29 | 1377 | } |
Vanger | 0:b86d15c6ba29 | 1378 | } |
Vanger | 0:b86d15c6ba29 | 1379 | |
Vanger | 0:b86d15c6ba29 | 1380 | encContentOctetSz = SetImplicit(ASN_OCTET_STRING, 0, |
Vanger | 0:b86d15c6ba29 | 1381 | desOutSz, encContentOctet); |
Vanger | 0:b86d15c6ba29 | 1382 | |
Vanger | 0:b86d15c6ba29 | 1383 | encContentSeqSz = SetSequence(contentTypeSz + contentEncAlgoSz + |
Vanger | 0:b86d15c6ba29 | 1384 | ivOctetStringSz + DES_BLOCK_SIZE + |
Vanger | 0:b86d15c6ba29 | 1385 | encContentOctetSz + desOutSz, encContentSeq); |
Vanger | 0:b86d15c6ba29 | 1386 | |
Vanger | 0:b86d15c6ba29 | 1387 | /* keep track of sizes for outer wrapper layering */ |
Vanger | 0:b86d15c6ba29 | 1388 | totalSz = verSz + recipSetSz + recipSz + encContentSeqSz + contentTypeSz + |
Vanger | 0:b86d15c6ba29 | 1389 | contentEncAlgoSz + ivOctetStringSz + DES_BLOCK_SIZE + |
Vanger | 0:b86d15c6ba29 | 1390 | encContentOctetSz + desOutSz; |
Vanger | 0:b86d15c6ba29 | 1391 | |
Vanger | 0:b86d15c6ba29 | 1392 | /* EnvelopedData */ |
Vanger | 0:b86d15c6ba29 | 1393 | envDataSeqSz = SetSequence(totalSz, envDataSeq); |
Vanger | 0:b86d15c6ba29 | 1394 | totalSz += envDataSeqSz; |
Vanger | 0:b86d15c6ba29 | 1395 | |
Vanger | 0:b86d15c6ba29 | 1396 | /* outer content */ |
Vanger | 0:b86d15c6ba29 | 1397 | outerContentSz = SetExplicit(0, totalSz, outerContent); |
Vanger | 0:b86d15c6ba29 | 1398 | totalSz += outerContentTypeSz; |
Vanger | 0:b86d15c6ba29 | 1399 | totalSz += outerContentSz; |
Vanger | 0:b86d15c6ba29 | 1400 | |
Vanger | 0:b86d15c6ba29 | 1401 | /* ContentInfo */ |
Vanger | 0:b86d15c6ba29 | 1402 | contentInfoSeqSz = SetSequence(totalSz, contentInfoSeq); |
Vanger | 0:b86d15c6ba29 | 1403 | totalSz += contentInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 1404 | |
Vanger | 0:b86d15c6ba29 | 1405 | if (totalSz > (int)outputSz) { |
Vanger | 0:b86d15c6ba29 | 1406 | CYASSL_MSG("Pkcs7_encrypt output buffer too small"); |
Vanger | 0:b86d15c6ba29 | 1407 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1408 | if (dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 1409 | XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1410 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1411 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1412 | #endif |
Vanger | 0:b86d15c6ba29 | 1413 | return BUFFER_E; |
Vanger | 0:b86d15c6ba29 | 1414 | } |
Vanger | 0:b86d15c6ba29 | 1415 | |
Vanger | 0:b86d15c6ba29 | 1416 | XMEMCPY(output + idx, contentInfoSeq, contentInfoSeqSz); |
Vanger | 0:b86d15c6ba29 | 1417 | idx += contentInfoSeqSz; |
Vanger | 0:b86d15c6ba29 | 1418 | XMEMCPY(output + idx, outerContentType, outerContentTypeSz); |
Vanger | 0:b86d15c6ba29 | 1419 | idx += outerContentTypeSz; |
Vanger | 0:b86d15c6ba29 | 1420 | XMEMCPY(output + idx, outerContent, outerContentSz); |
Vanger | 0:b86d15c6ba29 | 1421 | idx += outerContentSz; |
Vanger | 0:b86d15c6ba29 | 1422 | XMEMCPY(output + idx, envDataSeq, envDataSeqSz); |
Vanger | 0:b86d15c6ba29 | 1423 | idx += envDataSeqSz; |
Vanger | 0:b86d15c6ba29 | 1424 | XMEMCPY(output + idx, ver, verSz); |
Vanger | 0:b86d15c6ba29 | 1425 | idx += verSz; |
Vanger | 0:b86d15c6ba29 | 1426 | XMEMCPY(output + idx, recipSet, recipSetSz); |
Vanger | 0:b86d15c6ba29 | 1427 | idx += recipSetSz; |
Vanger | 0:b86d15c6ba29 | 1428 | XMEMCPY(output + idx, recip, recipSz); |
Vanger | 0:b86d15c6ba29 | 1429 | idx += recipSz; |
Vanger | 0:b86d15c6ba29 | 1430 | XMEMCPY(output + idx, encContentSeq, encContentSeqSz); |
Vanger | 0:b86d15c6ba29 | 1431 | idx += encContentSeqSz; |
Vanger | 0:b86d15c6ba29 | 1432 | XMEMCPY(output + idx, contentType, contentTypeSz); |
Vanger | 0:b86d15c6ba29 | 1433 | idx += contentTypeSz; |
Vanger | 0:b86d15c6ba29 | 1434 | XMEMCPY(output + idx, contentEncAlgo, contentEncAlgoSz); |
Vanger | 0:b86d15c6ba29 | 1435 | idx += contentEncAlgoSz; |
Vanger | 0:b86d15c6ba29 | 1436 | XMEMCPY(output + idx, ivOctetString, ivOctetStringSz); |
Vanger | 0:b86d15c6ba29 | 1437 | idx += ivOctetStringSz; |
Vanger | 0:b86d15c6ba29 | 1438 | XMEMCPY(output + idx, tmpIv, DES_BLOCK_SIZE); |
Vanger | 0:b86d15c6ba29 | 1439 | idx += DES_BLOCK_SIZE; |
Vanger | 0:b86d15c6ba29 | 1440 | XMEMCPY(output + idx, encContentOctet, encContentOctetSz); |
Vanger | 0:b86d15c6ba29 | 1441 | idx += encContentOctetSz; |
Vanger | 0:b86d15c6ba29 | 1442 | XMEMCPY(output + idx, encryptedContent, desOutSz); |
Vanger | 0:b86d15c6ba29 | 1443 | idx += desOutSz; |
Vanger | 0:b86d15c6ba29 | 1444 | |
Vanger | 0:b86d15c6ba29 | 1445 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4) |
Vanger | 0:b86d15c6ba29 | 1446 | FreeRng(&rng); |
Vanger | 0:b86d15c6ba29 | 1447 | #endif |
Vanger | 0:b86d15c6ba29 | 1448 | |
Vanger | 0:b86d15c6ba29 | 1449 | XMEMSET(contentKeyPlain, 0, MAX_CONTENT_KEY_LEN); |
Vanger | 0:b86d15c6ba29 | 1450 | |
Vanger | 0:b86d15c6ba29 | 1451 | if (dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 1452 | XFREE(plain, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1453 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1454 | |
Vanger | 0:b86d15c6ba29 | 1455 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1456 | XFREE(recip, NULL, DYNAMMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1457 | #endif |
Vanger | 0:b86d15c6ba29 | 1458 | |
Vanger | 0:b86d15c6ba29 | 1459 | return idx; |
Vanger | 0:b86d15c6ba29 | 1460 | } |
Vanger | 0:b86d15c6ba29 | 1461 | |
Vanger | 0:b86d15c6ba29 | 1462 | /* unwrap and decrypt PKCS#7 envelopedData object, return decoded size */ |
Vanger | 0:b86d15c6ba29 | 1463 | CYASSL_API int PKCS7_DecodeEnvelopedData(PKCS7* pkcs7, byte* pkiMsg, |
Vanger | 0:b86d15c6ba29 | 1464 | word32 pkiMsgSz, byte* output, |
Vanger | 0:b86d15c6ba29 | 1465 | word32 outputSz) |
Vanger | 0:b86d15c6ba29 | 1466 | { |
Vanger | 0:b86d15c6ba29 | 1467 | int recipFound = 0; |
Vanger | 0:b86d15c6ba29 | 1468 | int ret, version, length; |
Vanger | 0:b86d15c6ba29 | 1469 | word32 savedIdx = 0, idx = 0; |
Vanger | 0:b86d15c6ba29 | 1470 | word32 contentType, encOID; |
Vanger | 0:b86d15c6ba29 | 1471 | byte issuerHash[SHA_DIGEST_SIZE]; |
Vanger | 0:b86d15c6ba29 | 1472 | |
Vanger | 0:b86d15c6ba29 | 1473 | int encryptedKeySz, keySz; |
Vanger | 0:b86d15c6ba29 | 1474 | byte tmpIv[DES_BLOCK_SIZE]; |
Vanger | 0:b86d15c6ba29 | 1475 | byte* decryptedKey = NULL; |
Vanger | 0:b86d15c6ba29 | 1476 | |
Vanger | 0:b86d15c6ba29 | 1477 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1478 | mp_int* serialNum; |
Vanger | 0:b86d15c6ba29 | 1479 | byte* encryptedKey; |
Vanger | 0:b86d15c6ba29 | 1480 | RsaKey* privKey; |
Vanger | 0:b86d15c6ba29 | 1481 | #else |
Vanger | 0:b86d15c6ba29 | 1482 | mp_int stack_serialNum; |
Vanger | 0:b86d15c6ba29 | 1483 | mp_int* serialNum = &stack_serialNum; |
Vanger | 0:b86d15c6ba29 | 1484 | byte encryptedKey[MAX_ENCRYPTED_KEY_SZ]; |
Vanger | 0:b86d15c6ba29 | 1485 | |
Vanger | 0:b86d15c6ba29 | 1486 | RsaKey stack_privKey; |
Vanger | 0:b86d15c6ba29 | 1487 | RsaKey* privKey = &stack_privKey; |
Vanger | 0:b86d15c6ba29 | 1488 | #endif |
Vanger | 0:b86d15c6ba29 | 1489 | int encryptedContentSz; |
Vanger | 0:b86d15c6ba29 | 1490 | byte padLen; |
Vanger | 0:b86d15c6ba29 | 1491 | byte* encryptedContent = NULL; |
Vanger | 0:b86d15c6ba29 | 1492 | |
Vanger | 0:b86d15c6ba29 | 1493 | if (pkcs7 == NULL || pkcs7->singleCert == NULL || |
Vanger | 0:b86d15c6ba29 | 1494 | pkcs7->singleCertSz == 0 || pkcs7->privateKey == NULL || |
Vanger | 0:b86d15c6ba29 | 1495 | pkcs7->privateKeySz == 0) |
Vanger | 0:b86d15c6ba29 | 1496 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1497 | |
Vanger | 0:b86d15c6ba29 | 1498 | if (pkiMsg == NULL || pkiMsgSz == 0 || |
Vanger | 0:b86d15c6ba29 | 1499 | output == NULL || outputSz == 0) |
Vanger | 0:b86d15c6ba29 | 1500 | return BAD_FUNC_ARG; |
Vanger | 0:b86d15c6ba29 | 1501 | |
Vanger | 0:b86d15c6ba29 | 1502 | /* read past ContentInfo, verify type is envelopedData */ |
Vanger | 0:b86d15c6ba29 | 1503 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 1504 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1505 | |
Vanger | 0:b86d15c6ba29 | 1506 | if (GetContentType(pkiMsg, &idx, &contentType, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 1507 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1508 | |
Vanger | 0:b86d15c6ba29 | 1509 | if (contentType != ENVELOPED_DATA) { |
Vanger | 0:b86d15c6ba29 | 1510 | CYASSL_MSG("PKCS#7 input not of type EnvelopedData"); |
Vanger | 0:b86d15c6ba29 | 1511 | return PKCS7_OID_E; |
Vanger | 0:b86d15c6ba29 | 1512 | } |
Vanger | 0:b86d15c6ba29 | 1513 | |
Vanger | 0:b86d15c6ba29 | 1514 | if (pkiMsg[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)) |
Vanger | 0:b86d15c6ba29 | 1515 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1516 | |
Vanger | 0:b86d15c6ba29 | 1517 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 1518 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1519 | |
Vanger | 0:b86d15c6ba29 | 1520 | /* remove EnvelopedData and version */ |
Vanger | 0:b86d15c6ba29 | 1521 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 1522 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1523 | |
Vanger | 0:b86d15c6ba29 | 1524 | if (GetMyVersion(pkiMsg, &idx, &version) < 0) |
Vanger | 0:b86d15c6ba29 | 1525 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1526 | |
Vanger | 0:b86d15c6ba29 | 1527 | if (version != 0) { |
Vanger | 0:b86d15c6ba29 | 1528 | CYASSL_MSG("PKCS#7 envelopedData needs to be of version 0"); |
Vanger | 0:b86d15c6ba29 | 1529 | return ASN_VERSION_E; |
Vanger | 0:b86d15c6ba29 | 1530 | } |
Vanger | 0:b86d15c6ba29 | 1531 | |
Vanger | 0:b86d15c6ba29 | 1532 | /* walk through RecipientInfo set, find correct recipient */ |
Vanger | 0:b86d15c6ba29 | 1533 | if (GetSet(pkiMsg, &idx, &length, pkiMsgSz) < 0) |
Vanger | 0:b86d15c6ba29 | 1534 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1535 | |
Vanger | 0:b86d15c6ba29 | 1536 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1537 | encryptedKey = (byte*)XMALLOC(MAX_ENCRYPTED_KEY_SZ, NULL, |
Vanger | 0:b86d15c6ba29 | 1538 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1539 | if (encryptedKey == NULL) |
Vanger | 0:b86d15c6ba29 | 1540 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1541 | #endif |
Vanger | 0:b86d15c6ba29 | 1542 | |
Vanger | 0:b86d15c6ba29 | 1543 | savedIdx = idx; |
Vanger | 0:b86d15c6ba29 | 1544 | recipFound = 0; |
Vanger | 0:b86d15c6ba29 | 1545 | |
Vanger | 0:b86d15c6ba29 | 1546 | /* when looking for next recipient, use first sequence and version to |
Vanger | 0:b86d15c6ba29 | 1547 | * indicate there is another, if not, move on */ |
Vanger | 0:b86d15c6ba29 | 1548 | while(recipFound == 0) { |
Vanger | 0:b86d15c6ba29 | 1549 | |
Vanger | 0:b86d15c6ba29 | 1550 | /* remove RecipientInfo, if we don't have a SEQUENCE, back up idx to |
Vanger | 0:b86d15c6ba29 | 1551 | * last good saved one */ |
Vanger | 0:b86d15c6ba29 | 1552 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1553 | idx = savedIdx; |
Vanger | 0:b86d15c6ba29 | 1554 | break; |
Vanger | 0:b86d15c6ba29 | 1555 | } |
Vanger | 0:b86d15c6ba29 | 1556 | |
Vanger | 0:b86d15c6ba29 | 1557 | if (GetMyVersion(pkiMsg, &idx, &version) < 0) { |
Vanger | 0:b86d15c6ba29 | 1558 | idx = savedIdx; |
Vanger | 0:b86d15c6ba29 | 1559 | break; |
Vanger | 0:b86d15c6ba29 | 1560 | } |
Vanger | 0:b86d15c6ba29 | 1561 | |
Vanger | 0:b86d15c6ba29 | 1562 | if (version != 0) { |
Vanger | 0:b86d15c6ba29 | 1563 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1564 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1565 | #endif |
Vanger | 0:b86d15c6ba29 | 1566 | return ASN_VERSION_E; |
Vanger | 0:b86d15c6ba29 | 1567 | } |
Vanger | 0:b86d15c6ba29 | 1568 | |
Vanger | 0:b86d15c6ba29 | 1569 | /* remove IssuerAndSerialNumber */ |
Vanger | 0:b86d15c6ba29 | 1570 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1571 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1572 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1573 | #endif |
Vanger | 0:b86d15c6ba29 | 1574 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1575 | } |
Vanger | 0:b86d15c6ba29 | 1576 | |
Vanger | 0:b86d15c6ba29 | 1577 | if (GetNameHash(pkiMsg, &idx, issuerHash, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1578 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1579 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1580 | #endif |
Vanger | 0:b86d15c6ba29 | 1581 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1582 | } |
Vanger | 0:b86d15c6ba29 | 1583 | |
Vanger | 0:b86d15c6ba29 | 1584 | /* if we found correct recipient, issuer hashes will match */ |
Vanger | 0:b86d15c6ba29 | 1585 | if (XMEMCMP(issuerHash, pkcs7->issuerHash, SHA_DIGEST_SIZE) == 0) { |
Vanger | 0:b86d15c6ba29 | 1586 | recipFound = 1; |
Vanger | 0:b86d15c6ba29 | 1587 | } |
Vanger | 0:b86d15c6ba29 | 1588 | |
Vanger | 0:b86d15c6ba29 | 1589 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1590 | serialNum = (mp_int*)XMALLOC(sizeof(mp_int), NULL, |
Vanger | 0:b86d15c6ba29 | 1591 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1592 | if (serialNum == NULL) { |
Vanger | 0:b86d15c6ba29 | 1593 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1594 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1595 | } |
Vanger | 0:b86d15c6ba29 | 1596 | #endif |
Vanger | 0:b86d15c6ba29 | 1597 | |
Vanger | 0:b86d15c6ba29 | 1598 | if (GetInt(serialNum, pkiMsg, &idx, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1599 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1600 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1601 | XFREE(serialNum, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1602 | #endif |
Vanger | 0:b86d15c6ba29 | 1603 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1604 | } |
Vanger | 0:b86d15c6ba29 | 1605 | |
Vanger | 0:b86d15c6ba29 | 1606 | mp_clear(serialNum); |
Vanger | 0:b86d15c6ba29 | 1607 | |
Vanger | 0:b86d15c6ba29 | 1608 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1609 | XFREE(serialNum, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1610 | #endif |
Vanger | 0:b86d15c6ba29 | 1611 | |
Vanger | 0:b86d15c6ba29 | 1612 | if (GetAlgoId(pkiMsg, &idx, &encOID, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1613 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1614 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1615 | #endif |
Vanger | 0:b86d15c6ba29 | 1616 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1617 | } |
Vanger | 0:b86d15c6ba29 | 1618 | |
Vanger | 0:b86d15c6ba29 | 1619 | /* key encryption algorithm must be RSA for now */ |
Vanger | 0:b86d15c6ba29 | 1620 | if (encOID != RSAk) { |
Vanger | 0:b86d15c6ba29 | 1621 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1622 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1623 | #endif |
Vanger | 0:b86d15c6ba29 | 1624 | return ALGO_ID_E; |
Vanger | 0:b86d15c6ba29 | 1625 | } |
Vanger | 0:b86d15c6ba29 | 1626 | |
Vanger | 0:b86d15c6ba29 | 1627 | /* read encryptedKey */ |
Vanger | 0:b86d15c6ba29 | 1628 | if (pkiMsg[idx++] != ASN_OCTET_STRING) { |
Vanger | 0:b86d15c6ba29 | 1629 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1630 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1631 | #endif |
Vanger | 0:b86d15c6ba29 | 1632 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1633 | } |
Vanger | 0:b86d15c6ba29 | 1634 | |
Vanger | 0:b86d15c6ba29 | 1635 | if (GetLength(pkiMsg, &idx, &encryptedKeySz, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1636 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1637 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1638 | #endif |
Vanger | 0:b86d15c6ba29 | 1639 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1640 | } |
Vanger | 0:b86d15c6ba29 | 1641 | |
Vanger | 0:b86d15c6ba29 | 1642 | if (recipFound == 1) |
Vanger | 0:b86d15c6ba29 | 1643 | XMEMCPY(encryptedKey, &pkiMsg[idx], encryptedKeySz); |
Vanger | 0:b86d15c6ba29 | 1644 | idx += encryptedKeySz; |
Vanger | 0:b86d15c6ba29 | 1645 | |
Vanger | 0:b86d15c6ba29 | 1646 | /* update good idx */ |
Vanger | 0:b86d15c6ba29 | 1647 | savedIdx = idx; |
Vanger | 0:b86d15c6ba29 | 1648 | } |
Vanger | 0:b86d15c6ba29 | 1649 | |
Vanger | 0:b86d15c6ba29 | 1650 | if (recipFound == 0) { |
Vanger | 0:b86d15c6ba29 | 1651 | CYASSL_MSG("No recipient found in envelopedData that matches input"); |
Vanger | 0:b86d15c6ba29 | 1652 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1653 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1654 | #endif |
Vanger | 0:b86d15c6ba29 | 1655 | return PKCS7_RECIP_E; |
Vanger | 0:b86d15c6ba29 | 1656 | } |
Vanger | 0:b86d15c6ba29 | 1657 | |
Vanger | 0:b86d15c6ba29 | 1658 | /* remove EncryptedContentInfo */ |
Vanger | 0:b86d15c6ba29 | 1659 | if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1660 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1661 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1662 | #endif |
Vanger | 0:b86d15c6ba29 | 1663 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1664 | } |
Vanger | 0:b86d15c6ba29 | 1665 | |
Vanger | 0:b86d15c6ba29 | 1666 | if (GetContentType(pkiMsg, &idx, &contentType, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1667 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1668 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1669 | #endif |
Vanger | 0:b86d15c6ba29 | 1670 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1671 | } |
Vanger | 0:b86d15c6ba29 | 1672 | |
Vanger | 0:b86d15c6ba29 | 1673 | if (GetAlgoId(pkiMsg, &idx, &encOID, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1674 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1675 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1676 | #endif |
Vanger | 0:b86d15c6ba29 | 1677 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1678 | } |
Vanger | 0:b86d15c6ba29 | 1679 | |
Vanger | 0:b86d15c6ba29 | 1680 | /* get block cipher IV, stored in OPTIONAL parameter of AlgoID */ |
Vanger | 0:b86d15c6ba29 | 1681 | if (pkiMsg[idx++] != ASN_OCTET_STRING) { |
Vanger | 0:b86d15c6ba29 | 1682 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1683 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1684 | #endif |
Vanger | 0:b86d15c6ba29 | 1685 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1686 | } |
Vanger | 0:b86d15c6ba29 | 1687 | |
Vanger | 0:b86d15c6ba29 | 1688 | if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1689 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1690 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1691 | #endif |
Vanger | 0:b86d15c6ba29 | 1692 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1693 | } |
Vanger | 0:b86d15c6ba29 | 1694 | |
Vanger | 0:b86d15c6ba29 | 1695 | if (length != DES_BLOCK_SIZE) { |
Vanger | 0:b86d15c6ba29 | 1696 | CYASSL_MSG("Incorrect IV length, must be of DES_BLOCK_SIZE"); |
Vanger | 0:b86d15c6ba29 | 1697 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1698 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1699 | #endif |
Vanger | 0:b86d15c6ba29 | 1700 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1701 | } |
Vanger | 0:b86d15c6ba29 | 1702 | |
Vanger | 0:b86d15c6ba29 | 1703 | XMEMCPY(tmpIv, &pkiMsg[idx], length); |
Vanger | 0:b86d15c6ba29 | 1704 | idx += length; |
Vanger | 0:b86d15c6ba29 | 1705 | |
Vanger | 0:b86d15c6ba29 | 1706 | /* read encryptedContent, cont[0] */ |
Vanger | 0:b86d15c6ba29 | 1707 | if (pkiMsg[idx++] != (ASN_CONTEXT_SPECIFIC | 0)) { |
Vanger | 0:b86d15c6ba29 | 1708 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1709 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1710 | #endif |
Vanger | 0:b86d15c6ba29 | 1711 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1712 | } |
Vanger | 0:b86d15c6ba29 | 1713 | |
Vanger | 0:b86d15c6ba29 | 1714 | if (GetLength(pkiMsg, &idx, &encryptedContentSz, pkiMsgSz) < 0) { |
Vanger | 0:b86d15c6ba29 | 1715 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1716 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1717 | #endif |
Vanger | 0:b86d15c6ba29 | 1718 | return ASN_PARSE_E; |
Vanger | 0:b86d15c6ba29 | 1719 | } |
Vanger | 0:b86d15c6ba29 | 1720 | |
Vanger | 0:b86d15c6ba29 | 1721 | encryptedContent = (byte*)XMALLOC(encryptedContentSz, NULL, |
Vanger | 0:b86d15c6ba29 | 1722 | DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1723 | if (encryptedContent == NULL) { |
Vanger | 0:b86d15c6ba29 | 1724 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1725 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1726 | #endif |
Vanger | 0:b86d15c6ba29 | 1727 | return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1728 | } |
Vanger | 0:b86d15c6ba29 | 1729 | |
Vanger | 0:b86d15c6ba29 | 1730 | XMEMCPY(encryptedContent, &pkiMsg[idx], encryptedContentSz); |
Vanger | 0:b86d15c6ba29 | 1731 | |
Vanger | 0:b86d15c6ba29 | 1732 | /* load private key */ |
Vanger | 0:b86d15c6ba29 | 1733 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1734 | privKey = (RsaKey*)XMALLOC(sizeof(RsaKey), NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1735 | if (privKey == NULL) { |
Vanger | 0:b86d15c6ba29 | 1736 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1737 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; |
Vanger | 0:b86d15c6ba29 | 1738 | } |
Vanger | 0:b86d15c6ba29 | 1739 | #endif |
Vanger | 0:b86d15c6ba29 | 1740 | |
Vanger | 0:b86d15c6ba29 | 1741 | ret = InitRsaKey(privKey, 0); |
Vanger | 0:b86d15c6ba29 | 1742 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1743 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1744 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1745 | XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1746 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1747 | #endif |
Vanger | 0:b86d15c6ba29 | 1748 | return ret; |
Vanger | 0:b86d15c6ba29 | 1749 | } |
Vanger | 0:b86d15c6ba29 | 1750 | |
Vanger | 0:b86d15c6ba29 | 1751 | idx = 0; |
Vanger | 0:b86d15c6ba29 | 1752 | |
Vanger | 0:b86d15c6ba29 | 1753 | ret = RsaPrivateKeyDecode(pkcs7->privateKey, &idx, privKey, |
Vanger | 0:b86d15c6ba29 | 1754 | pkcs7->privateKeySz); |
Vanger | 0:b86d15c6ba29 | 1755 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1756 | CYASSL_MSG("Failed to decode RSA private key"); |
Vanger | 0:b86d15c6ba29 | 1757 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1758 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1759 | XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1760 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1761 | #endif |
Vanger | 0:b86d15c6ba29 | 1762 | return ret; |
Vanger | 0:b86d15c6ba29 | 1763 | } |
Vanger | 0:b86d15c6ba29 | 1764 | |
Vanger | 0:b86d15c6ba29 | 1765 | /* decrypt encryptedKey */ |
Vanger | 0:b86d15c6ba29 | 1766 | keySz = RsaPrivateDecryptInline(encryptedKey, encryptedKeySz, |
Vanger | 0:b86d15c6ba29 | 1767 | &decryptedKey, privKey); |
Vanger | 0:b86d15c6ba29 | 1768 | FreeRsaKey(privKey); |
Vanger | 0:b86d15c6ba29 | 1769 | |
Vanger | 0:b86d15c6ba29 | 1770 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1771 | XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1772 | #endif |
Vanger | 0:b86d15c6ba29 | 1773 | |
Vanger | 0:b86d15c6ba29 | 1774 | if (keySz <= 0) { |
Vanger | 0:b86d15c6ba29 | 1775 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1776 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1777 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1778 | #endif |
Vanger | 0:b86d15c6ba29 | 1779 | return keySz; |
Vanger | 0:b86d15c6ba29 | 1780 | } |
Vanger | 0:b86d15c6ba29 | 1781 | |
Vanger | 0:b86d15c6ba29 | 1782 | /* decrypt encryptedContent */ |
Vanger | 0:b86d15c6ba29 | 1783 | if (encOID == DESb) { |
Vanger | 0:b86d15c6ba29 | 1784 | Des des; |
Vanger | 0:b86d15c6ba29 | 1785 | ret = Des_SetKey(&des, decryptedKey, tmpIv, DES_DECRYPTION); |
Vanger | 0:b86d15c6ba29 | 1786 | |
Vanger | 0:b86d15c6ba29 | 1787 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1788 | Des_CbcDecrypt(&des, encryptedContent, encryptedContent, |
Vanger | 0:b86d15c6ba29 | 1789 | encryptedContentSz); |
Vanger | 0:b86d15c6ba29 | 1790 | |
Vanger | 0:b86d15c6ba29 | 1791 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1792 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1793 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1794 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1795 | #endif |
Vanger | 0:b86d15c6ba29 | 1796 | return ret; |
Vanger | 0:b86d15c6ba29 | 1797 | } |
Vanger | 0:b86d15c6ba29 | 1798 | } |
Vanger | 0:b86d15c6ba29 | 1799 | else if (encOID == DES3b) { |
Vanger | 0:b86d15c6ba29 | 1800 | Des3 des; |
Vanger | 0:b86d15c6ba29 | 1801 | ret = Des3_SetKey(&des, decryptedKey, tmpIv, DES_DECRYPTION); |
Vanger | 0:b86d15c6ba29 | 1802 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1803 | ret = Des3_CbcDecrypt(&des, encryptedContent, encryptedContent, |
Vanger | 0:b86d15c6ba29 | 1804 | encryptedContentSz); |
Vanger | 0:b86d15c6ba29 | 1805 | |
Vanger | 0:b86d15c6ba29 | 1806 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1807 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1808 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1809 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1810 | #endif |
Vanger | 0:b86d15c6ba29 | 1811 | return ret; |
Vanger | 0:b86d15c6ba29 | 1812 | } |
Vanger | 0:b86d15c6ba29 | 1813 | } else { |
Vanger | 0:b86d15c6ba29 | 1814 | CYASSL_MSG("Unsupported content encryption OID type"); |
Vanger | 0:b86d15c6ba29 | 1815 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1816 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1817 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1818 | #endif |
Vanger | 0:b86d15c6ba29 | 1819 | return ALGO_ID_E; |
Vanger | 0:b86d15c6ba29 | 1820 | } |
Vanger | 0:b86d15c6ba29 | 1821 | |
Vanger | 0:b86d15c6ba29 | 1822 | padLen = encryptedContent[encryptedContentSz-1]; |
Vanger | 0:b86d15c6ba29 | 1823 | |
Vanger | 0:b86d15c6ba29 | 1824 | /* copy plaintext to output */ |
Vanger | 0:b86d15c6ba29 | 1825 | XMEMCPY(output, encryptedContent, encryptedContentSz - padLen); |
Vanger | 0:b86d15c6ba29 | 1826 | |
Vanger | 0:b86d15c6ba29 | 1827 | /* free memory, zero out keys */ |
Vanger | 0:b86d15c6ba29 | 1828 | XMEMSET(encryptedKey, 0, MAX_ENCRYPTED_KEY_SZ); |
Vanger | 0:b86d15c6ba29 | 1829 | XMEMSET(encryptedContent, 0, encryptedContentSz); |
Vanger | 0:b86d15c6ba29 | 1830 | XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1831 | #ifdef CYASSL_SMALL_STACK |
Vanger | 0:b86d15c6ba29 | 1832 | XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); |
Vanger | 0:b86d15c6ba29 | 1833 | #endif |
Vanger | 0:b86d15c6ba29 | 1834 | |
Vanger | 0:b86d15c6ba29 | 1835 | return encryptedContentSz - padLen; |
Vanger | 0:b86d15c6ba29 | 1836 | } |
Vanger | 0:b86d15c6ba29 | 1837 | |
Vanger | 0:b86d15c6ba29 | 1838 | |
Vanger | 0:b86d15c6ba29 | 1839 | #else /* HAVE_PKCS7 */ |
Vanger | 0:b86d15c6ba29 | 1840 | |
Vanger | 0:b86d15c6ba29 | 1841 | |
Vanger | 0:b86d15c6ba29 | 1842 | #ifdef _MSC_VER |
Vanger | 0:b86d15c6ba29 | 1843 | /* 4206 warning for blank file */ |
Vanger | 0:b86d15c6ba29 | 1844 | #pragma warning(disable: 4206) |
Vanger | 0:b86d15c6ba29 | 1845 | #endif |
Vanger | 0:b86d15c6ba29 | 1846 | |
Vanger | 0:b86d15c6ba29 | 1847 | |
Vanger | 0:b86d15c6ba29 | 1848 | #endif /* HAVE_PKCS7 */ |
Vanger | 0:b86d15c6ba29 | 1849 |