Greg Steiert / pegasus_dev

Dependents:   blinky_max32630fthr

features/mbedtls/src/pkparse.c@3:1198227e6421, 2016-12-16 (annotated)

Committer:
switches
Date:
Fri Dec 16 16:27:57 2016 +0000
Revision:
3:1198227e6421
Parent:
0:5c4d7b2438d3 
Changed ADC scale for MAX32625 platforms to 1.2V full scale to match MAX32630 platforms

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /*
switches 0:5c4d7b2438d3 2 * Public Key layer for parsing key files and structures
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
switches 0:5c4d7b2438d3 5 * SPDX-License-Identifier: Apache-2.0
switches 0:5c4d7b2438d3 6 *
switches 0:5c4d7b2438d3 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
switches 0:5c4d7b2438d3 8 * not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 9 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 10 *
switches 0:5c4d7b2438d3 11 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 12 *
switches 0:5c4d7b2438d3 13 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
switches 0:5c4d7b2438d3 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 16 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 17 * limitations under the License.
switches 0:5c4d7b2438d3 18 *
switches 0:5c4d7b2438d3 19 * This file is part of mbed TLS (https://tls.mbed.org)
switches 0:5c4d7b2438d3 20 */
switches 0:5c4d7b2438d3 21
switches 0:5c4d7b2438d3 22 #if !defined(MBEDTLS_CONFIG_FILE)
switches 0:5c4d7b2438d3 23 #include "mbedtls/config.h"
switches 0:5c4d7b2438d3 24 #else
switches 0:5c4d7b2438d3 25 #include MBEDTLS_CONFIG_FILE
switches 0:5c4d7b2438d3 26 #endif
switches 0:5c4d7b2438d3 27
switches 0:5c4d7b2438d3 28 #if defined(MBEDTLS_PK_PARSE_C)
switches 0:5c4d7b2438d3 29
switches 0:5c4d7b2438d3 30 #include "mbedtls/pk.h"
switches 0:5c4d7b2438d3 31 #include "mbedtls/asn1.h"
switches 0:5c4d7b2438d3 32 #include "mbedtls/oid.h"
switches 0:5c4d7b2438d3 33
switches 0:5c4d7b2438d3 34 #include <string.h>
switches 0:5c4d7b2438d3 35
switches 0:5c4d7b2438d3 36 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 37 #include "mbedtls/rsa.h"
switches 0:5c4d7b2438d3 38 #endif
switches 0:5c4d7b2438d3 39 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 40 #include "mbedtls/ecp.h"
switches 0:5c4d7b2438d3 41 #endif
switches 0:5c4d7b2438d3 42 #if defined(MBEDTLS_ECDSA_C)
switches 0:5c4d7b2438d3 43 #include "mbedtls/ecdsa.h"
switches 0:5c4d7b2438d3 44 #endif
switches 0:5c4d7b2438d3 45 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 46 #include "mbedtls/pem.h"
switches 0:5c4d7b2438d3 47 #endif
switches 0:5c4d7b2438d3 48 #if defined(MBEDTLS_PKCS5_C)
switches 0:5c4d7b2438d3 49 #include "mbedtls/pkcs5.h"
switches 0:5c4d7b2438d3 50 #endif
switches 0:5c4d7b2438d3 51 #if defined(MBEDTLS_PKCS12_C)
switches 0:5c4d7b2438d3 52 #include "mbedtls/pkcs12.h"
switches 0:5c4d7b2438d3 53 #endif
switches 0:5c4d7b2438d3 54
switches 0:5c4d7b2438d3 55 #if defined(MBEDTLS_PLATFORM_C)
switches 0:5c4d7b2438d3 56 #include "mbedtls/platform.h"
switches 0:5c4d7b2438d3 57 #else
switches 0:5c4d7b2438d3 58 #include <stdlib.h>
switches 0:5c4d7b2438d3 59 #define mbedtls_calloc calloc
switches 0:5c4d7b2438d3 60 #define mbedtls_free free
switches 0:5c4d7b2438d3 61 #endif
switches 0:5c4d7b2438d3 62
switches 0:5c4d7b2438d3 63 #if defined(MBEDTLS_FS_IO)
switches 0:5c4d7b2438d3 64 /* Implementation that should never be optimized out by the compiler */
switches 0:5c4d7b2438d3 65 static void mbedtls_zeroize( void *v, size_t n ) {
switches 0:5c4d7b2438d3 66 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
switches 0:5c4d7b2438d3 67 }
switches 0:5c4d7b2438d3 68
switches 0:5c4d7b2438d3 69 /*
switches 0:5c4d7b2438d3 70 * Load all data from a file into a given buffer.
switches 0:5c4d7b2438d3 71 *
switches 0:5c4d7b2438d3 72 * The file is expected to contain either PEM or DER encoded data.
switches 0:5c4d7b2438d3 73 * A terminating null byte is always appended. It is included in the announced
switches 0:5c4d7b2438d3 74 * length only if the data looks like it is PEM encoded.
switches 0:5c4d7b2438d3 75 */
switches 0:5c4d7b2438d3 76 int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n )
switches 0:5c4d7b2438d3 77 {
switches 0:5c4d7b2438d3 78 FILE *f;
switches 0:5c4d7b2438d3 79 long size;
switches 0:5c4d7b2438d3 80
switches 0:5c4d7b2438d3 81 if( ( f = fopen( path, "rb" ) ) == NULL )
switches 0:5c4d7b2438d3 82 return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
switches 0:5c4d7b2438d3 83
switches 0:5c4d7b2438d3 84 fseek( f, 0, SEEK_END );
switches 0:5c4d7b2438d3 85 if( ( size = ftell( f ) ) == -1 )
switches 0:5c4d7b2438d3 86 {
switches 0:5c4d7b2438d3 87 fclose( f );
switches 0:5c4d7b2438d3 88 return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
switches 0:5c4d7b2438d3 89 }
switches 0:5c4d7b2438d3 90 fseek( f, 0, SEEK_SET );
switches 0:5c4d7b2438d3 91
switches 0:5c4d7b2438d3 92 *n = (size_t) size;
switches 0:5c4d7b2438d3 93
switches 0:5c4d7b2438d3 94 if( *n + 1 == 0 ||
switches 0:5c4d7b2438d3 95 ( *buf = mbedtls_calloc( 1, *n + 1 ) ) == NULL )
switches 0:5c4d7b2438d3 96 {
switches 0:5c4d7b2438d3 97 fclose( f );
switches 0:5c4d7b2438d3 98 return( MBEDTLS_ERR_PK_ALLOC_FAILED );
switches 0:5c4d7b2438d3 99 }
switches 0:5c4d7b2438d3 100
switches 0:5c4d7b2438d3 101 if( fread( *buf, 1, *n, f ) != *n )
switches 0:5c4d7b2438d3 102 {
switches 0:5c4d7b2438d3 103 fclose( f );
switches 0:5c4d7b2438d3 104 mbedtls_free( *buf );
switches 0:5c4d7b2438d3 105 return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
switches 0:5c4d7b2438d3 106 }
switches 0:5c4d7b2438d3 107
switches 0:5c4d7b2438d3 108 fclose( f );
switches 0:5c4d7b2438d3 109
switches 0:5c4d7b2438d3 110 (*buf)[*n] = '\0';
switches 0:5c4d7b2438d3 111
switches 0:5c4d7b2438d3 112 if( strstr( (const char *) *buf, "-----BEGIN " ) != NULL )
switches 0:5c4d7b2438d3 113 ++*n;
switches 0:5c4d7b2438d3 114
switches 0:5c4d7b2438d3 115 return( 0 );
switches 0:5c4d7b2438d3 116 }
switches 0:5c4d7b2438d3 117
switches 0:5c4d7b2438d3 118 /*
switches 0:5c4d7b2438d3 119 * Load and parse a private key
switches 0:5c4d7b2438d3 120 */
switches 0:5c4d7b2438d3 121 int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
switches 0:5c4d7b2438d3 122 const char *path, const char *pwd )
switches 0:5c4d7b2438d3 123 {
switches 0:5c4d7b2438d3 124 int ret;
switches 0:5c4d7b2438d3 125 size_t n;
switches 0:5c4d7b2438d3 126 unsigned char *buf;
switches 0:5c4d7b2438d3 127
switches 0:5c4d7b2438d3 128 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
switches 0:5c4d7b2438d3 129 return( ret );
switches 0:5c4d7b2438d3 130
switches 0:5c4d7b2438d3 131 if( pwd == NULL )
switches 0:5c4d7b2438d3 132 ret = mbedtls_pk_parse_key( ctx, buf, n, NULL, 0 );
switches 0:5c4d7b2438d3 133 else
switches 0:5c4d7b2438d3 134 ret = mbedtls_pk_parse_key( ctx, buf, n,
switches 0:5c4d7b2438d3 135 (const unsigned char *) pwd, strlen( pwd ) );
switches 0:5c4d7b2438d3 136
switches 0:5c4d7b2438d3 137 mbedtls_zeroize( buf, n );
switches 0:5c4d7b2438d3 138 mbedtls_free( buf );
switches 0:5c4d7b2438d3 139
switches 0:5c4d7b2438d3 140 return( ret );
switches 0:5c4d7b2438d3 141 }
switches 0:5c4d7b2438d3 142
switches 0:5c4d7b2438d3 143 /*
switches 0:5c4d7b2438d3 144 * Load and parse a public key
switches 0:5c4d7b2438d3 145 */
switches 0:5c4d7b2438d3 146 int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path )
switches 0:5c4d7b2438d3 147 {
switches 0:5c4d7b2438d3 148 int ret;
switches 0:5c4d7b2438d3 149 size_t n;
switches 0:5c4d7b2438d3 150 unsigned char *buf;
switches 0:5c4d7b2438d3 151
switches 0:5c4d7b2438d3 152 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
switches 0:5c4d7b2438d3 153 return( ret );
switches 0:5c4d7b2438d3 154
switches 0:5c4d7b2438d3 155 ret = mbedtls_pk_parse_public_key( ctx, buf, n );
switches 0:5c4d7b2438d3 156
switches 0:5c4d7b2438d3 157 mbedtls_zeroize( buf, n );
switches 0:5c4d7b2438d3 158 mbedtls_free( buf );
switches 0:5c4d7b2438d3 159
switches 0:5c4d7b2438d3 160 return( ret );
switches 0:5c4d7b2438d3 161 }
switches 0:5c4d7b2438d3 162 #endif /* MBEDTLS_FS_IO */
switches 0:5c4d7b2438d3 163
switches 0:5c4d7b2438d3 164 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 165 /* Minimally parse an ECParameters buffer to and mbedtls_asn1_buf
switches 0:5c4d7b2438d3 166 *
switches 0:5c4d7b2438d3 167 * ECParameters ::= CHOICE {
switches 0:5c4d7b2438d3 168 * namedCurve OBJECT IDENTIFIER
switches 0:5c4d7b2438d3 169 * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
switches 0:5c4d7b2438d3 170 * -- implicitCurve NULL
switches 0:5c4d7b2438d3 171 * }
switches 0:5c4d7b2438d3 172 */
switches 0:5c4d7b2438d3 173 static int pk_get_ecparams( unsigned char **p, const unsigned char *end,
switches 0:5c4d7b2438d3 174 mbedtls_asn1_buf *params )
switches 0:5c4d7b2438d3 175 {
switches 0:5c4d7b2438d3 176 int ret;
switches 0:5c4d7b2438d3 177
switches 0:5c4d7b2438d3 178 /* Tag may be either OID or SEQUENCE */
switches 0:5c4d7b2438d3 179 params->tag = **p;
switches 0:5c4d7b2438d3 180 if( params->tag != MBEDTLS_ASN1_OID
switches 0:5c4d7b2438d3 181 #if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
switches 0:5c4d7b2438d3 182 && params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE )
switches 0:5c4d7b2438d3 183 #endif
switches 0:5c4d7b2438d3 184 )
switches 0:5c4d7b2438d3 185 {
switches 0:5c4d7b2438d3 186 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 187 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
switches 0:5c4d7b2438d3 188 }
switches 0:5c4d7b2438d3 189
switches 0:5c4d7b2438d3 190 if( ( ret = mbedtls_asn1_get_tag( p, end, &params->len, params->tag ) ) != 0 )
switches 0:5c4d7b2438d3 191 {
switches 0:5c4d7b2438d3 192 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 193 }
switches 0:5c4d7b2438d3 194
switches 0:5c4d7b2438d3 195 params->p = *p;
switches 0:5c4d7b2438d3 196 *p += params->len;
switches 0:5c4d7b2438d3 197
switches 0:5c4d7b2438d3 198 if( *p != end )
switches 0:5c4d7b2438d3 199 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 200 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 201
switches 0:5c4d7b2438d3 202 return( 0 );
switches 0:5c4d7b2438d3 203 }
switches 0:5c4d7b2438d3 204
switches 0:5c4d7b2438d3 205 #if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
switches 0:5c4d7b2438d3 206 /*
switches 0:5c4d7b2438d3 207 * Parse a SpecifiedECDomain (SEC 1 C.2) and (mostly) fill the group with it.
switches 0:5c4d7b2438d3 208 * WARNING: the resulting group should only be used with
switches 0:5c4d7b2438d3 209 * pk_group_id_from_specified(), since its base point may not be set correctly
switches 0:5c4d7b2438d3 210 * if it was encoded compressed.
switches 0:5c4d7b2438d3 211 *
switches 0:5c4d7b2438d3 212 * SpecifiedECDomain ::= SEQUENCE {
switches 0:5c4d7b2438d3 213 * version SpecifiedECDomainVersion(ecdpVer1 | ecdpVer2 | ecdpVer3, ...),
switches 0:5c4d7b2438d3 214 * fieldID FieldID {{FieldTypes}},
switches 0:5c4d7b2438d3 215 * curve Curve,
switches 0:5c4d7b2438d3 216 * base ECPoint,
switches 0:5c4d7b2438d3 217 * order INTEGER,
switches 0:5c4d7b2438d3 218 * cofactor INTEGER OPTIONAL,
switches 0:5c4d7b2438d3 219 * hash HashAlgorithm OPTIONAL,
switches 0:5c4d7b2438d3 220 * ...
switches 0:5c4d7b2438d3 221 * }
switches 0:5c4d7b2438d3 222 *
switches 0:5c4d7b2438d3 223 * We only support prime-field as field type, and ignore hash and cofactor.
switches 0:5c4d7b2438d3 224 */
switches 0:5c4d7b2438d3 225 static int pk_group_from_specified( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
switches 0:5c4d7b2438d3 226 {
switches 0:5c4d7b2438d3 227 int ret;
switches 0:5c4d7b2438d3 228 unsigned char *p = params->p;
switches 0:5c4d7b2438d3 229 const unsigned char * const end = params->p + params->len;
switches 0:5c4d7b2438d3 230 const unsigned char *end_field, *end_curve;
switches 0:5c4d7b2438d3 231 size_t len;
switches 0:5c4d7b2438d3 232 int ver;
switches 0:5c4d7b2438d3 233
switches 0:5c4d7b2438d3 234 /* SpecifiedECDomainVersion ::= INTEGER { 1, 2, 3 } */
switches 0:5c4d7b2438d3 235 if( ( ret = mbedtls_asn1_get_int( &p, end, &ver ) ) != 0 )
switches 0:5c4d7b2438d3 236 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 237
switches 0:5c4d7b2438d3 238 if( ver < 1 || ver > 3 )
switches 0:5c4d7b2438d3 239 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
switches 0:5c4d7b2438d3 240
switches 0:5c4d7b2438d3 241 /*
switches 0:5c4d7b2438d3 242 * FieldID { FIELD-ID:IOSet } ::= SEQUENCE { -- Finite field
switches 0:5c4d7b2438d3 243 * fieldType FIELD-ID.&id({IOSet}),
switches 0:5c4d7b2438d3 244 * parameters FIELD-ID.&Type({IOSet}{@fieldType})
switches 0:5c4d7b2438d3 245 * }
switches 0:5c4d7b2438d3 246 */
switches 0:5c4d7b2438d3 247 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 248 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 249 return( ret );
switches 0:5c4d7b2438d3 250
switches 0:5c4d7b2438d3 251 end_field = p + len;
switches 0:5c4d7b2438d3 252
switches 0:5c4d7b2438d3 253 /*
switches 0:5c4d7b2438d3 254 * FIELD-ID ::= TYPE-IDENTIFIER
switches 0:5c4d7b2438d3 255 * FieldTypes FIELD-ID ::= {
switches 0:5c4d7b2438d3 256 * { Prime-p IDENTIFIED BY prime-field } |
switches 0:5c4d7b2438d3 257 * { Characteristic-two IDENTIFIED BY characteristic-two-field }
switches 0:5c4d7b2438d3 258 * }
switches 0:5c4d7b2438d3 259 * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
switches 0:5c4d7b2438d3 260 */
switches 0:5c4d7b2438d3 261 if( ( ret = mbedtls_asn1_get_tag( &p, end_field, &len, MBEDTLS_ASN1_OID ) ) != 0 )
switches 0:5c4d7b2438d3 262 return( ret );
switches 0:5c4d7b2438d3 263
switches 0:5c4d7b2438d3 264 if( len != MBEDTLS_OID_SIZE( MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD ) ||
switches 0:5c4d7b2438d3 265 memcmp( p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len ) != 0 )
switches 0:5c4d7b2438d3 266 {
switches 0:5c4d7b2438d3 267 return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
switches 0:5c4d7b2438d3 268 }
switches 0:5c4d7b2438d3 269
switches 0:5c4d7b2438d3 270 p += len;
switches 0:5c4d7b2438d3 271
switches 0:5c4d7b2438d3 272 /* Prime-p ::= INTEGER -- Field of size p. */
switches 0:5c4d7b2438d3 273 if( ( ret = mbedtls_asn1_get_mpi( &p, end_field, &grp->P ) ) != 0 )
switches 0:5c4d7b2438d3 274 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 275
switches 0:5c4d7b2438d3 276 grp->pbits = mbedtls_mpi_bitlen( &grp->P );
switches 0:5c4d7b2438d3 277
switches 0:5c4d7b2438d3 278 if( p != end_field )
switches 0:5c4d7b2438d3 279 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 280 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 281
switches 0:5c4d7b2438d3 282 /*
switches 0:5c4d7b2438d3 283 * Curve ::= SEQUENCE {
switches 0:5c4d7b2438d3 284 * a FieldElement,
switches 0:5c4d7b2438d3 285 * b FieldElement,
switches 0:5c4d7b2438d3 286 * seed BIT STRING OPTIONAL
switches 0:5c4d7b2438d3 287 * -- Shall be present if used in SpecifiedECDomain
switches 0:5c4d7b2438d3 288 * -- with version equal to ecdpVer2 or ecdpVer3
switches 0:5c4d7b2438d3 289 * }
switches 0:5c4d7b2438d3 290 */
switches 0:5c4d7b2438d3 291 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 292 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 293 return( ret );
switches 0:5c4d7b2438d3 294
switches 0:5c4d7b2438d3 295 end_curve = p + len;
switches 0:5c4d7b2438d3 296
switches 0:5c4d7b2438d3 297 /*
switches 0:5c4d7b2438d3 298 * FieldElement ::= OCTET STRING
switches 0:5c4d7b2438d3 299 * containing an integer in the case of a prime field
switches 0:5c4d7b2438d3 300 */
switches 0:5c4d7b2438d3 301 if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
switches 0:5c4d7b2438d3 302 ( ret = mbedtls_mpi_read_binary( &grp->A, p, len ) ) != 0 )
switches 0:5c4d7b2438d3 303 {
switches 0:5c4d7b2438d3 304 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 305 }
switches 0:5c4d7b2438d3 306
switches 0:5c4d7b2438d3 307 p += len;
switches 0:5c4d7b2438d3 308
switches 0:5c4d7b2438d3 309 if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
switches 0:5c4d7b2438d3 310 ( ret = mbedtls_mpi_read_binary( &grp->B, p, len ) ) != 0 )
switches 0:5c4d7b2438d3 311 {
switches 0:5c4d7b2438d3 312 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 313 }
switches 0:5c4d7b2438d3 314
switches 0:5c4d7b2438d3 315 p += len;
switches 0:5c4d7b2438d3 316
switches 0:5c4d7b2438d3 317 /* Ignore seed BIT STRING OPTIONAL */
switches 0:5c4d7b2438d3 318 if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING ) ) == 0 )
switches 0:5c4d7b2438d3 319 p += len;
switches 0:5c4d7b2438d3 320
switches 0:5c4d7b2438d3 321 if( p != end_curve )
switches 0:5c4d7b2438d3 322 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 323 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 324
switches 0:5c4d7b2438d3 325 /*
switches 0:5c4d7b2438d3 326 * ECPoint ::= OCTET STRING
switches 0:5c4d7b2438d3 327 */
switches 0:5c4d7b2438d3 328 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
switches 0:5c4d7b2438d3 329 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 330
switches 0:5c4d7b2438d3 331 if( ( ret = mbedtls_ecp_point_read_binary( grp, &grp->G,
switches 0:5c4d7b2438d3 332 ( const unsigned char *) p, len ) ) != 0 )
switches 0:5c4d7b2438d3 333 {
switches 0:5c4d7b2438d3 334 /*
switches 0:5c4d7b2438d3 335 * If we can't read the point because it's compressed, cheat by
switches 0:5c4d7b2438d3 336 * reading only the X coordinate and the parity bit of Y.
switches 0:5c4d7b2438d3 337 */
switches 0:5c4d7b2438d3 338 if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ||
switches 0:5c4d7b2438d3 339 ( p[0] != 0x02 && p[0] != 0x03 ) ||
switches 0:5c4d7b2438d3 340 len != mbedtls_mpi_size( &grp->P ) + 1 ||
switches 0:5c4d7b2438d3 341 mbedtls_mpi_read_binary( &grp->G.X, p + 1, len - 1 ) != 0 ||
switches 0:5c4d7b2438d3 342 mbedtls_mpi_lset( &grp->G.Y, p[0] - 2 ) != 0 ||
switches 0:5c4d7b2438d3 343 mbedtls_mpi_lset( &grp->G.Z, 1 ) != 0 )
switches 0:5c4d7b2438d3 344 {
switches 0:5c4d7b2438d3 345 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
switches 0:5c4d7b2438d3 346 }
switches 0:5c4d7b2438d3 347 }
switches 0:5c4d7b2438d3 348
switches 0:5c4d7b2438d3 349 p += len;
switches 0:5c4d7b2438d3 350
switches 0:5c4d7b2438d3 351 /*
switches 0:5c4d7b2438d3 352 * order INTEGER
switches 0:5c4d7b2438d3 353 */
switches 0:5c4d7b2438d3 354 if( ( ret = mbedtls_asn1_get_mpi( &p, end, &grp->N ) ) != 0 )
switches 0:5c4d7b2438d3 355 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 356
switches 0:5c4d7b2438d3 357 grp->nbits = mbedtls_mpi_bitlen( &grp->N );
switches 0:5c4d7b2438d3 358
switches 0:5c4d7b2438d3 359 /*
switches 0:5c4d7b2438d3 360 * Allow optional elements by purposefully not enforcing p == end here.
switches 0:5c4d7b2438d3 361 */
switches 0:5c4d7b2438d3 362
switches 0:5c4d7b2438d3 363 return( 0 );
switches 0:5c4d7b2438d3 364 }
switches 0:5c4d7b2438d3 365
switches 0:5c4d7b2438d3 366 /*
switches 0:5c4d7b2438d3 367 * Find the group id associated with an (almost filled) group as generated by
switches 0:5c4d7b2438d3 368 * pk_group_from_specified(), or return an error if unknown.
switches 0:5c4d7b2438d3 369 */
switches 0:5c4d7b2438d3 370 static int pk_group_id_from_group( const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id )
switches 0:5c4d7b2438d3 371 {
switches 0:5c4d7b2438d3 372 int ret = 0;
switches 0:5c4d7b2438d3 373 mbedtls_ecp_group ref;
switches 0:5c4d7b2438d3 374 const mbedtls_ecp_group_id *id;
switches 0:5c4d7b2438d3 375
switches 0:5c4d7b2438d3 376 mbedtls_ecp_group_init( &ref );
switches 0:5c4d7b2438d3 377
switches 0:5c4d7b2438d3 378 for( id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++ )
switches 0:5c4d7b2438d3 379 {
switches 0:5c4d7b2438d3 380 /* Load the group associated to that id */
switches 0:5c4d7b2438d3 381 mbedtls_ecp_group_free( &ref );
switches 0:5c4d7b2438d3 382 MBEDTLS_MPI_CHK( mbedtls_ecp_group_load( &ref, *id ) );
switches 0:5c4d7b2438d3 383
switches 0:5c4d7b2438d3 384 /* Compare to the group we were given, starting with easy tests */
switches 0:5c4d7b2438d3 385 if( grp->pbits == ref.pbits && grp->nbits == ref.nbits &&
switches 0:5c4d7b2438d3 386 mbedtls_mpi_cmp_mpi( &grp->P, &ref.P ) == 0 &&
switches 0:5c4d7b2438d3 387 mbedtls_mpi_cmp_mpi( &grp->A, &ref.A ) == 0 &&
switches 0:5c4d7b2438d3 388 mbedtls_mpi_cmp_mpi( &grp->B, &ref.B ) == 0 &&
switches 0:5c4d7b2438d3 389 mbedtls_mpi_cmp_mpi( &grp->N, &ref.N ) == 0 &&
switches 0:5c4d7b2438d3 390 mbedtls_mpi_cmp_mpi( &grp->G.X, &ref.G.X ) == 0 &&
switches 0:5c4d7b2438d3 391 mbedtls_mpi_cmp_mpi( &grp->G.Z, &ref.G.Z ) == 0 &&
switches 0:5c4d7b2438d3 392 /* For Y we may only know the parity bit, so compare only that */
switches 0:5c4d7b2438d3 393 mbedtls_mpi_get_bit( &grp->G.Y, 0 ) == mbedtls_mpi_get_bit( &ref.G.Y, 0 ) )
switches 0:5c4d7b2438d3 394 {
switches 0:5c4d7b2438d3 395 break;
switches 0:5c4d7b2438d3 396 }
switches 0:5c4d7b2438d3 397
switches 0:5c4d7b2438d3 398 }
switches 0:5c4d7b2438d3 399
switches 0:5c4d7b2438d3 400 cleanup:
switches 0:5c4d7b2438d3 401 mbedtls_ecp_group_free( &ref );
switches 0:5c4d7b2438d3 402
switches 0:5c4d7b2438d3 403 *grp_id = *id;
switches 0:5c4d7b2438d3 404
switches 0:5c4d7b2438d3 405 if( ret == 0 && *id == MBEDTLS_ECP_DP_NONE )
switches 0:5c4d7b2438d3 406 ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
switches 0:5c4d7b2438d3 407
switches 0:5c4d7b2438d3 408 return( ret );
switches 0:5c4d7b2438d3 409 }
switches 0:5c4d7b2438d3 410
switches 0:5c4d7b2438d3 411 /*
switches 0:5c4d7b2438d3 412 * Parse a SpecifiedECDomain (SEC 1 C.2) and find the associated group ID
switches 0:5c4d7b2438d3 413 */
switches 0:5c4d7b2438d3 414 static int pk_group_id_from_specified( const mbedtls_asn1_buf *params,
switches 0:5c4d7b2438d3 415 mbedtls_ecp_group_id *grp_id )
switches 0:5c4d7b2438d3 416 {
switches 0:5c4d7b2438d3 417 int ret;
switches 0:5c4d7b2438d3 418 mbedtls_ecp_group grp;
switches 0:5c4d7b2438d3 419
switches 0:5c4d7b2438d3 420 mbedtls_ecp_group_init( &grp );
switches 0:5c4d7b2438d3 421
switches 0:5c4d7b2438d3 422 if( ( ret = pk_group_from_specified( params, &grp ) ) != 0 )
switches 0:5c4d7b2438d3 423 goto cleanup;
switches 0:5c4d7b2438d3 424
switches 0:5c4d7b2438d3 425 ret = pk_group_id_from_group( &grp, grp_id );
switches 0:5c4d7b2438d3 426
switches 0:5c4d7b2438d3 427 cleanup:
switches 0:5c4d7b2438d3 428 mbedtls_ecp_group_free( &grp );
switches 0:5c4d7b2438d3 429
switches 0:5c4d7b2438d3 430 return( ret );
switches 0:5c4d7b2438d3 431 }
switches 0:5c4d7b2438d3 432 #endif /* MBEDTLS_PK_PARSE_EC_EXTENDED */
switches 0:5c4d7b2438d3 433
switches 0:5c4d7b2438d3 434 /*
switches 0:5c4d7b2438d3 435 * Use EC parameters to initialise an EC group
switches 0:5c4d7b2438d3 436 *
switches 0:5c4d7b2438d3 437 * ECParameters ::= CHOICE {
switches 0:5c4d7b2438d3 438 * namedCurve OBJECT IDENTIFIER
switches 0:5c4d7b2438d3 439 * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
switches 0:5c4d7b2438d3 440 * -- implicitCurve NULL
switches 0:5c4d7b2438d3 441 */
switches 0:5c4d7b2438d3 442 static int pk_use_ecparams( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
switches 0:5c4d7b2438d3 443 {
switches 0:5c4d7b2438d3 444 int ret;
switches 0:5c4d7b2438d3 445 mbedtls_ecp_group_id grp_id;
switches 0:5c4d7b2438d3 446
switches 0:5c4d7b2438d3 447 if( params->tag == MBEDTLS_ASN1_OID )
switches 0:5c4d7b2438d3 448 {
switches 0:5c4d7b2438d3 449 if( mbedtls_oid_get_ec_grp( params, &grp_id ) != 0 )
switches 0:5c4d7b2438d3 450 return( MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE );
switches 0:5c4d7b2438d3 451 }
switches 0:5c4d7b2438d3 452 else
switches 0:5c4d7b2438d3 453 {
switches 0:5c4d7b2438d3 454 #if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
switches 0:5c4d7b2438d3 455 if( ( ret = pk_group_id_from_specified( params, &grp_id ) ) != 0 )
switches 0:5c4d7b2438d3 456 return( ret );
switches 0:5c4d7b2438d3 457 #else
switches 0:5c4d7b2438d3 458 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
switches 0:5c4d7b2438d3 459 #endif
switches 0:5c4d7b2438d3 460 }
switches 0:5c4d7b2438d3 461
switches 0:5c4d7b2438d3 462 /*
switches 0:5c4d7b2438d3 463 * grp may already be initilialized; if so, make sure IDs match
switches 0:5c4d7b2438d3 464 */
switches 0:5c4d7b2438d3 465 if( grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id )
switches 0:5c4d7b2438d3 466 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
switches 0:5c4d7b2438d3 467
switches 0:5c4d7b2438d3 468 if( ( ret = mbedtls_ecp_group_load( grp, grp_id ) ) != 0 )
switches 0:5c4d7b2438d3 469 return( ret );
switches 0:5c4d7b2438d3 470
switches 0:5c4d7b2438d3 471 return( 0 );
switches 0:5c4d7b2438d3 472 }
switches 0:5c4d7b2438d3 473
switches 0:5c4d7b2438d3 474 /*
switches 0:5c4d7b2438d3 475 * EC public key is an EC point
switches 0:5c4d7b2438d3 476 *
switches 0:5c4d7b2438d3 477 * The caller is responsible for clearing the structure upon failure if
switches 0:5c4d7b2438d3 478 * desired. Take care to pass along the possible ECP_FEATURE_UNAVAILABLE
switches 0:5c4d7b2438d3 479 * return code of mbedtls_ecp_point_read_binary() and leave p in a usable state.
switches 0:5c4d7b2438d3 480 */
switches 0:5c4d7b2438d3 481 static int pk_get_ecpubkey( unsigned char **p, const unsigned char *end,
switches 0:5c4d7b2438d3 482 mbedtls_ecp_keypair *key )
switches 0:5c4d7b2438d3 483 {
switches 0:5c4d7b2438d3 484 int ret;
switches 0:5c4d7b2438d3 485
switches 0:5c4d7b2438d3 486 if( ( ret = mbedtls_ecp_point_read_binary( &key->grp, &key->Q,
switches 0:5c4d7b2438d3 487 (const unsigned char *) *p, end - *p ) ) == 0 )
switches 0:5c4d7b2438d3 488 {
switches 0:5c4d7b2438d3 489 ret = mbedtls_ecp_check_pubkey( &key->grp, &key->Q );
switches 0:5c4d7b2438d3 490 }
switches 0:5c4d7b2438d3 491
switches 0:5c4d7b2438d3 492 /*
switches 0:5c4d7b2438d3 493 * We know mbedtls_ecp_point_read_binary consumed all bytes or failed
switches 0:5c4d7b2438d3 494 */
switches 0:5c4d7b2438d3 495 *p = (unsigned char *) end;
switches 0:5c4d7b2438d3 496
switches 0:5c4d7b2438d3 497 return( ret );
switches 0:5c4d7b2438d3 498 }
switches 0:5c4d7b2438d3 499 #endif /* MBEDTLS_ECP_C */
switches 0:5c4d7b2438d3 500
switches 0:5c4d7b2438d3 501 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 502 /*
switches 0:5c4d7b2438d3 503 * RSAPublicKey ::= SEQUENCE {
switches 0:5c4d7b2438d3 504 * modulus INTEGER, -- n
switches 0:5c4d7b2438d3 505 * publicExponent INTEGER -- e
switches 0:5c4d7b2438d3 506 * }
switches 0:5c4d7b2438d3 507 */
switches 0:5c4d7b2438d3 508 static int pk_get_rsapubkey( unsigned char **p,
switches 0:5c4d7b2438d3 509 const unsigned char *end,
switches 0:5c4d7b2438d3 510 mbedtls_rsa_context *rsa )
switches 0:5c4d7b2438d3 511 {
switches 0:5c4d7b2438d3 512 int ret;
switches 0:5c4d7b2438d3 513 size_t len;
switches 0:5c4d7b2438d3 514
switches 0:5c4d7b2438d3 515 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
switches 0:5c4d7b2438d3 516 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 517 return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
switches 0:5c4d7b2438d3 518
switches 0:5c4d7b2438d3 519 if( *p + len != end )
switches 0:5c4d7b2438d3 520 return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
switches 0:5c4d7b2438d3 521 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 522
switches 0:5c4d7b2438d3 523 if( ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->N ) ) != 0 ||
switches 0:5c4d7b2438d3 524 ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->E ) ) != 0 )
switches 0:5c4d7b2438d3 525 return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
switches 0:5c4d7b2438d3 526
switches 0:5c4d7b2438d3 527 if( *p != end )
switches 0:5c4d7b2438d3 528 return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
switches 0:5c4d7b2438d3 529 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 530
switches 0:5c4d7b2438d3 531 if( ( ret = mbedtls_rsa_check_pubkey( rsa ) ) != 0 )
switches 0:5c4d7b2438d3 532 return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
switches 0:5c4d7b2438d3 533
switches 0:5c4d7b2438d3 534 rsa->len = mbedtls_mpi_size( &rsa->N );
switches 0:5c4d7b2438d3 535
switches 0:5c4d7b2438d3 536 return( 0 );
switches 0:5c4d7b2438d3 537 }
switches 0:5c4d7b2438d3 538 #endif /* MBEDTLS_RSA_C */
switches 0:5c4d7b2438d3 539
switches 0:5c4d7b2438d3 540 /* Get a PK algorithm identifier
switches 0:5c4d7b2438d3 541 *
switches 0:5c4d7b2438d3 542 * AlgorithmIdentifier ::= SEQUENCE {
switches 0:5c4d7b2438d3 543 * algorithm OBJECT IDENTIFIER,
switches 0:5c4d7b2438d3 544 * parameters ANY DEFINED BY algorithm OPTIONAL }
switches 0:5c4d7b2438d3 545 */
switches 0:5c4d7b2438d3 546 static int pk_get_pk_alg( unsigned char **p,
switches 0:5c4d7b2438d3 547 const unsigned char *end,
switches 0:5c4d7b2438d3 548 mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params )
switches 0:5c4d7b2438d3 549 {
switches 0:5c4d7b2438d3 550 int ret;
switches 0:5c4d7b2438d3 551 mbedtls_asn1_buf alg_oid;
switches 0:5c4d7b2438d3 552
switches 0:5c4d7b2438d3 553 memset( params, 0, sizeof(mbedtls_asn1_buf) );
switches 0:5c4d7b2438d3 554
switches 0:5c4d7b2438d3 555 if( ( ret = mbedtls_asn1_get_alg( p, end, &alg_oid, params ) ) != 0 )
switches 0:5c4d7b2438d3 556 return( MBEDTLS_ERR_PK_INVALID_ALG + ret );
switches 0:5c4d7b2438d3 557
switches 0:5c4d7b2438d3 558 if( mbedtls_oid_get_pk_alg( &alg_oid, pk_alg ) != 0 )
switches 0:5c4d7b2438d3 559 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 560
switches 0:5c4d7b2438d3 561 /*
switches 0:5c4d7b2438d3 562 * No parameters with RSA (only for EC)
switches 0:5c4d7b2438d3 563 */
switches 0:5c4d7b2438d3 564 if( *pk_alg == MBEDTLS_PK_RSA &&
switches 0:5c4d7b2438d3 565 ( ( params->tag != MBEDTLS_ASN1_NULL && params->tag != 0 ) ||
switches 0:5c4d7b2438d3 566 params->len != 0 ) )
switches 0:5c4d7b2438d3 567 {
switches 0:5c4d7b2438d3 568 return( MBEDTLS_ERR_PK_INVALID_ALG );
switches 0:5c4d7b2438d3 569 }
switches 0:5c4d7b2438d3 570
switches 0:5c4d7b2438d3 571 return( 0 );
switches 0:5c4d7b2438d3 572 }
switches 0:5c4d7b2438d3 573
switches 0:5c4d7b2438d3 574 /*
switches 0:5c4d7b2438d3 575 * SubjectPublicKeyInfo ::= SEQUENCE {
switches 0:5c4d7b2438d3 576 * algorithm AlgorithmIdentifier,
switches 0:5c4d7b2438d3 577 * subjectPublicKey BIT STRING }
switches 0:5c4d7b2438d3 578 */
switches 0:5c4d7b2438d3 579 int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
switches 0:5c4d7b2438d3 580 mbedtls_pk_context *pk )
switches 0:5c4d7b2438d3 581 {
switches 0:5c4d7b2438d3 582 int ret;
switches 0:5c4d7b2438d3 583 size_t len;
switches 0:5c4d7b2438d3 584 mbedtls_asn1_buf alg_params;
switches 0:5c4d7b2438d3 585 mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
switches 0:5c4d7b2438d3 586 const mbedtls_pk_info_t *pk_info;
switches 0:5c4d7b2438d3 587
switches 0:5c4d7b2438d3 588 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
switches 0:5c4d7b2438d3 589 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 590 {
switches 0:5c4d7b2438d3 591 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 592 }
switches 0:5c4d7b2438d3 593
switches 0:5c4d7b2438d3 594 end = *p + len;
switches 0:5c4d7b2438d3 595
switches 0:5c4d7b2438d3 596 if( ( ret = pk_get_pk_alg( p, end, &pk_alg, &alg_params ) ) != 0 )
switches 0:5c4d7b2438d3 597 return( ret );
switches 0:5c4d7b2438d3 598
switches 0:5c4d7b2438d3 599 if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 )
switches 0:5c4d7b2438d3 600 return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
switches 0:5c4d7b2438d3 601
switches 0:5c4d7b2438d3 602 if( *p + len != end )
switches 0:5c4d7b2438d3 603 return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
switches 0:5c4d7b2438d3 604 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 605
switches 0:5c4d7b2438d3 606 if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
switches 0:5c4d7b2438d3 607 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 608
switches 0:5c4d7b2438d3 609 if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
switches 0:5c4d7b2438d3 610 return( ret );
switches 0:5c4d7b2438d3 611
switches 0:5c4d7b2438d3 612 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 613 if( pk_alg == MBEDTLS_PK_RSA )
switches 0:5c4d7b2438d3 614 {
switches 0:5c4d7b2438d3 615 ret = pk_get_rsapubkey( p, end, mbedtls_pk_rsa( *pk ) );
switches 0:5c4d7b2438d3 616 } else
switches 0:5c4d7b2438d3 617 #endif /* MBEDTLS_RSA_C */
switches 0:5c4d7b2438d3 618 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 619 if( pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY )
switches 0:5c4d7b2438d3 620 {
switches 0:5c4d7b2438d3 621 ret = pk_use_ecparams( &alg_params, &mbedtls_pk_ec( *pk )->grp );
switches 0:5c4d7b2438d3 622 if( ret == 0 )
switches 0:5c4d7b2438d3 623 ret = pk_get_ecpubkey( p, end, mbedtls_pk_ec( *pk ) );
switches 0:5c4d7b2438d3 624 } else
switches 0:5c4d7b2438d3 625 #endif /* MBEDTLS_ECP_C */
switches 0:5c4d7b2438d3 626 ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
switches 0:5c4d7b2438d3 627
switches 0:5c4d7b2438d3 628 if( ret == 0 && *p != end )
switches 0:5c4d7b2438d3 629 ret = MBEDTLS_ERR_PK_INVALID_PUBKEY
switches 0:5c4d7b2438d3 630 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
switches 0:5c4d7b2438d3 631
switches 0:5c4d7b2438d3 632 if( ret != 0 )
switches 0:5c4d7b2438d3 633 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 634
switches 0:5c4d7b2438d3 635 return( ret );
switches 0:5c4d7b2438d3 636 }
switches 0:5c4d7b2438d3 637
switches 0:5c4d7b2438d3 638 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 639 /*
switches 0:5c4d7b2438d3 640 * Parse a PKCS#1 encoded private RSA key
switches 0:5c4d7b2438d3 641 */
switches 0:5c4d7b2438d3 642 static int pk_parse_key_pkcs1_der( mbedtls_rsa_context *rsa,
switches 0:5c4d7b2438d3 643 const unsigned char *key,
switches 0:5c4d7b2438d3 644 size_t keylen )
switches 0:5c4d7b2438d3 645 {
switches 0:5c4d7b2438d3 646 int ret;
switches 0:5c4d7b2438d3 647 size_t len;
switches 0:5c4d7b2438d3 648 unsigned char *p, *end;
switches 0:5c4d7b2438d3 649
switches 0:5c4d7b2438d3 650 p = (unsigned char *) key;
switches 0:5c4d7b2438d3 651 end = p + keylen;
switches 0:5c4d7b2438d3 652
switches 0:5c4d7b2438d3 653 /*
switches 0:5c4d7b2438d3 654 * This function parses the RSAPrivateKey (PKCS#1)
switches 0:5c4d7b2438d3 655 *
switches 0:5c4d7b2438d3 656 * RSAPrivateKey ::= SEQUENCE {
switches 0:5c4d7b2438d3 657 * version Version,
switches 0:5c4d7b2438d3 658 * modulus INTEGER, -- n
switches 0:5c4d7b2438d3 659 * publicExponent INTEGER, -- e
switches 0:5c4d7b2438d3 660 * privateExponent INTEGER, -- d
switches 0:5c4d7b2438d3 661 * prime1 INTEGER, -- p
switches 0:5c4d7b2438d3 662 * prime2 INTEGER, -- q
switches 0:5c4d7b2438d3 663 * exponent1 INTEGER, -- d mod (p-1)
switches 0:5c4d7b2438d3 664 * exponent2 INTEGER, -- d mod (q-1)
switches 0:5c4d7b2438d3 665 * coefficient INTEGER, -- (inverse of q) mod p
switches 0:5c4d7b2438d3 666 * otherPrimeInfos OtherPrimeInfos OPTIONAL
switches 0:5c4d7b2438d3 667 * }
switches 0:5c4d7b2438d3 668 */
switches 0:5c4d7b2438d3 669 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 670 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 671 {
switches 0:5c4d7b2438d3 672 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 673 }
switches 0:5c4d7b2438d3 674
switches 0:5c4d7b2438d3 675 end = p + len;
switches 0:5c4d7b2438d3 676
switches 0:5c4d7b2438d3 677 if( ( ret = mbedtls_asn1_get_int( &p, end, &rsa->ver ) ) != 0 )
switches 0:5c4d7b2438d3 678 {
switches 0:5c4d7b2438d3 679 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 680 }
switches 0:5c4d7b2438d3 681
switches 0:5c4d7b2438d3 682 if( rsa->ver != 0 )
switches 0:5c4d7b2438d3 683 {
switches 0:5c4d7b2438d3 684 return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
switches 0:5c4d7b2438d3 685 }
switches 0:5c4d7b2438d3 686
switches 0:5c4d7b2438d3 687 if( ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->N ) ) != 0 ||
switches 0:5c4d7b2438d3 688 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->E ) ) != 0 ||
switches 0:5c4d7b2438d3 689 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->D ) ) != 0 ||
switches 0:5c4d7b2438d3 690 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->P ) ) != 0 ||
switches 0:5c4d7b2438d3 691 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->Q ) ) != 0 ||
switches 0:5c4d7b2438d3 692 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DP ) ) != 0 ||
switches 0:5c4d7b2438d3 693 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DQ ) ) != 0 ||
switches 0:5c4d7b2438d3 694 ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->QP ) ) != 0 )
switches 0:5c4d7b2438d3 695 {
switches 0:5c4d7b2438d3 696 mbedtls_rsa_free( rsa );
switches 0:5c4d7b2438d3 697 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 698 }
switches 0:5c4d7b2438d3 699
switches 0:5c4d7b2438d3 700 rsa->len = mbedtls_mpi_size( &rsa->N );
switches 0:5c4d7b2438d3 701
switches 0:5c4d7b2438d3 702 if( p != end )
switches 0:5c4d7b2438d3 703 {
switches 0:5c4d7b2438d3 704 mbedtls_rsa_free( rsa );
switches 0:5c4d7b2438d3 705 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 706 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 707 }
switches 0:5c4d7b2438d3 708
switches 0:5c4d7b2438d3 709 if( ( ret = mbedtls_rsa_check_privkey( rsa ) ) != 0 )
switches 0:5c4d7b2438d3 710 {
switches 0:5c4d7b2438d3 711 mbedtls_rsa_free( rsa );
switches 0:5c4d7b2438d3 712 return( ret );
switches 0:5c4d7b2438d3 713 }
switches 0:5c4d7b2438d3 714
switches 0:5c4d7b2438d3 715 return( 0 );
switches 0:5c4d7b2438d3 716 }
switches 0:5c4d7b2438d3 717 #endif /* MBEDTLS_RSA_C */
switches 0:5c4d7b2438d3 718
switches 0:5c4d7b2438d3 719 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 720 /*
switches 0:5c4d7b2438d3 721 * Parse a SEC1 encoded private EC key
switches 0:5c4d7b2438d3 722 */
switches 0:5c4d7b2438d3 723 static int pk_parse_key_sec1_der( mbedtls_ecp_keypair *eck,
switches 0:5c4d7b2438d3 724 const unsigned char *key,
switches 0:5c4d7b2438d3 725 size_t keylen )
switches 0:5c4d7b2438d3 726 {
switches 0:5c4d7b2438d3 727 int ret;
switches 0:5c4d7b2438d3 728 int version, pubkey_done;
switches 0:5c4d7b2438d3 729 size_t len;
switches 0:5c4d7b2438d3 730 mbedtls_asn1_buf params;
switches 0:5c4d7b2438d3 731 unsigned char *p = (unsigned char *) key;
switches 0:5c4d7b2438d3 732 unsigned char *end = p + keylen;
switches 0:5c4d7b2438d3 733 unsigned char *end2;
switches 0:5c4d7b2438d3 734
switches 0:5c4d7b2438d3 735 /*
switches 0:5c4d7b2438d3 736 * RFC 5915, or SEC1 Appendix C.4
switches 0:5c4d7b2438d3 737 *
switches 0:5c4d7b2438d3 738 * ECPrivateKey ::= SEQUENCE {
switches 0:5c4d7b2438d3 739 * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
switches 0:5c4d7b2438d3 740 * privateKey OCTET STRING,
switches 0:5c4d7b2438d3 741 * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
switches 0:5c4d7b2438d3 742 * publicKey [1] BIT STRING OPTIONAL
switches 0:5c4d7b2438d3 743 * }
switches 0:5c4d7b2438d3 744 */
switches 0:5c4d7b2438d3 745 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 746 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 747 {
switches 0:5c4d7b2438d3 748 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 749 }
switches 0:5c4d7b2438d3 750
switches 0:5c4d7b2438d3 751 end = p + len;
switches 0:5c4d7b2438d3 752
switches 0:5c4d7b2438d3 753 if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
switches 0:5c4d7b2438d3 754 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 755
switches 0:5c4d7b2438d3 756 if( version != 1 )
switches 0:5c4d7b2438d3 757 return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
switches 0:5c4d7b2438d3 758
switches 0:5c4d7b2438d3 759 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
switches 0:5c4d7b2438d3 760 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 761
switches 0:5c4d7b2438d3 762 if( ( ret = mbedtls_mpi_read_binary( &eck->d, p, len ) ) != 0 )
switches 0:5c4d7b2438d3 763 {
switches 0:5c4d7b2438d3 764 mbedtls_ecp_keypair_free( eck );
switches 0:5c4d7b2438d3 765 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 766 }
switches 0:5c4d7b2438d3 767
switches 0:5c4d7b2438d3 768 p += len;
switches 0:5c4d7b2438d3 769
switches 0:5c4d7b2438d3 770 pubkey_done = 0;
switches 0:5c4d7b2438d3 771 if( p != end )
switches 0:5c4d7b2438d3 772 {
switches 0:5c4d7b2438d3 773 /*
switches 0:5c4d7b2438d3 774 * Is 'parameters' present?
switches 0:5c4d7b2438d3 775 */
switches 0:5c4d7b2438d3 776 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 777 MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 )
switches 0:5c4d7b2438d3 778 {
switches 0:5c4d7b2438d3 779 if( ( ret = pk_get_ecparams( &p, p + len, &params) ) != 0 ||
switches 0:5c4d7b2438d3 780 ( ret = pk_use_ecparams( &params, &eck->grp ) ) != 0 )
switches 0:5c4d7b2438d3 781 {
switches 0:5c4d7b2438d3 782 mbedtls_ecp_keypair_free( eck );
switches 0:5c4d7b2438d3 783 return( ret );
switches 0:5c4d7b2438d3 784 }
switches 0:5c4d7b2438d3 785 }
switches 0:5c4d7b2438d3 786 else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
switches 0:5c4d7b2438d3 787 {
switches 0:5c4d7b2438d3 788 mbedtls_ecp_keypair_free( eck );
switches 0:5c4d7b2438d3 789 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 790 }
switches 0:5c4d7b2438d3 791
switches 0:5c4d7b2438d3 792 /*
switches 0:5c4d7b2438d3 793 * Is 'publickey' present? If not, or if we can't read it (eg because it
switches 0:5c4d7b2438d3 794 * is compressed), create it from the private key.
switches 0:5c4d7b2438d3 795 */
switches 0:5c4d7b2438d3 796 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 797 MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 )
switches 0:5c4d7b2438d3 798 {
switches 0:5c4d7b2438d3 799 end2 = p + len;
switches 0:5c4d7b2438d3 800
switches 0:5c4d7b2438d3 801 if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
switches 0:5c4d7b2438d3 802 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 803
switches 0:5c4d7b2438d3 804 if( p + len != end2 )
switches 0:5c4d7b2438d3 805 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 806 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 807
switches 0:5c4d7b2438d3 808 if( ( ret = pk_get_ecpubkey( &p, end2, eck ) ) == 0 )
switches 0:5c4d7b2438d3 809 pubkey_done = 1;
switches 0:5c4d7b2438d3 810 else
switches 0:5c4d7b2438d3 811 {
switches 0:5c4d7b2438d3 812 /*
switches 0:5c4d7b2438d3 813 * The only acceptable failure mode of pk_get_ecpubkey() above
switches 0:5c4d7b2438d3 814 * is if the point format is not recognized.
switches 0:5c4d7b2438d3 815 */
switches 0:5c4d7b2438d3 816 if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE )
switches 0:5c4d7b2438d3 817 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
switches 0:5c4d7b2438d3 818 }
switches 0:5c4d7b2438d3 819 }
switches 0:5c4d7b2438d3 820 else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
switches 0:5c4d7b2438d3 821 {
switches 0:5c4d7b2438d3 822 mbedtls_ecp_keypair_free( eck );
switches 0:5c4d7b2438d3 823 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 824 }
switches 0:5c4d7b2438d3 825 }
switches 0:5c4d7b2438d3 826
switches 0:5c4d7b2438d3 827 if( ! pubkey_done &&
switches 0:5c4d7b2438d3 828 ( ret = mbedtls_ecp_mul( &eck->grp, &eck->Q, &eck->d, &eck->grp.G,
switches 0:5c4d7b2438d3 829 NULL, NULL ) ) != 0 )
switches 0:5c4d7b2438d3 830 {
switches 0:5c4d7b2438d3 831 mbedtls_ecp_keypair_free( eck );
switches 0:5c4d7b2438d3 832 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 833 }
switches 0:5c4d7b2438d3 834
switches 0:5c4d7b2438d3 835 if( ( ret = mbedtls_ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
switches 0:5c4d7b2438d3 836 {
switches 0:5c4d7b2438d3 837 mbedtls_ecp_keypair_free( eck );
switches 0:5c4d7b2438d3 838 return( ret );
switches 0:5c4d7b2438d3 839 }
switches 0:5c4d7b2438d3 840
switches 0:5c4d7b2438d3 841 return( 0 );
switches 0:5c4d7b2438d3 842 }
switches 0:5c4d7b2438d3 843 #endif /* MBEDTLS_ECP_C */
switches 0:5c4d7b2438d3 844
switches 0:5c4d7b2438d3 845 /*
switches 0:5c4d7b2438d3 846 * Parse an unencrypted PKCS#8 encoded private key
switches 0:5c4d7b2438d3 847 */
switches 0:5c4d7b2438d3 848 static int pk_parse_key_pkcs8_unencrypted_der(
switches 0:5c4d7b2438d3 849 mbedtls_pk_context *pk,
switches 0:5c4d7b2438d3 850 const unsigned char* key,
switches 0:5c4d7b2438d3 851 size_t keylen )
switches 0:5c4d7b2438d3 852 {
switches 0:5c4d7b2438d3 853 int ret, version;
switches 0:5c4d7b2438d3 854 size_t len;
switches 0:5c4d7b2438d3 855 mbedtls_asn1_buf params;
switches 0:5c4d7b2438d3 856 unsigned char *p = (unsigned char *) key;
switches 0:5c4d7b2438d3 857 unsigned char *end = p + keylen;
switches 0:5c4d7b2438d3 858 mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
switches 0:5c4d7b2438d3 859 const mbedtls_pk_info_t *pk_info;
switches 0:5c4d7b2438d3 860
switches 0:5c4d7b2438d3 861 /*
switches 0:5c4d7b2438d3 862 * This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
switches 0:5c4d7b2438d3 863 *
switches 0:5c4d7b2438d3 864 * PrivateKeyInfo ::= SEQUENCE {
switches 0:5c4d7b2438d3 865 * version Version,
switches 0:5c4d7b2438d3 866 * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
switches 0:5c4d7b2438d3 867 * privateKey PrivateKey,
switches 0:5c4d7b2438d3 868 * attributes [0] IMPLICIT Attributes OPTIONAL }
switches 0:5c4d7b2438d3 869 *
switches 0:5c4d7b2438d3 870 * Version ::= INTEGER
switches 0:5c4d7b2438d3 871 * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
switches 0:5c4d7b2438d3 872 * PrivateKey ::= OCTET STRING
switches 0:5c4d7b2438d3 873 *
switches 0:5c4d7b2438d3 874 * The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
switches 0:5c4d7b2438d3 875 */
switches 0:5c4d7b2438d3 876
switches 0:5c4d7b2438d3 877 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 878 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 879 {
switches 0:5c4d7b2438d3 880 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 881 }
switches 0:5c4d7b2438d3 882
switches 0:5c4d7b2438d3 883 end = p + len;
switches 0:5c4d7b2438d3 884
switches 0:5c4d7b2438d3 885 if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
switches 0:5c4d7b2438d3 886 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 887
switches 0:5c4d7b2438d3 888 if( version != 0 )
switches 0:5c4d7b2438d3 889 return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret );
switches 0:5c4d7b2438d3 890
switches 0:5c4d7b2438d3 891 if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, &params ) ) != 0 )
switches 0:5c4d7b2438d3 892 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 893
switches 0:5c4d7b2438d3 894 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
switches 0:5c4d7b2438d3 895 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 896
switches 0:5c4d7b2438d3 897 if( len < 1 )
switches 0:5c4d7b2438d3 898 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
switches 0:5c4d7b2438d3 899 MBEDTLS_ERR_ASN1_OUT_OF_DATA );
switches 0:5c4d7b2438d3 900
switches 0:5c4d7b2438d3 901 if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
switches 0:5c4d7b2438d3 902 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 903
switches 0:5c4d7b2438d3 904 if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
switches 0:5c4d7b2438d3 905 return( ret );
switches 0:5c4d7b2438d3 906
switches 0:5c4d7b2438d3 907 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 908 if( pk_alg == MBEDTLS_PK_RSA )
switches 0:5c4d7b2438d3 909 {
switches 0:5c4d7b2438d3 910 if( ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), p, len ) ) != 0 )
switches 0:5c4d7b2438d3 911 {
switches 0:5c4d7b2438d3 912 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 913 return( ret );
switches 0:5c4d7b2438d3 914 }
switches 0:5c4d7b2438d3 915 } else
switches 0:5c4d7b2438d3 916 #endif /* MBEDTLS_RSA_C */
switches 0:5c4d7b2438d3 917 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 918 if( pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH )
switches 0:5c4d7b2438d3 919 {
switches 0:5c4d7b2438d3 920 if( ( ret = pk_use_ecparams( &params, &mbedtls_pk_ec( *pk )->grp ) ) != 0 ||
switches 0:5c4d7b2438d3 921 ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), p, len ) ) != 0 )
switches 0:5c4d7b2438d3 922 {
switches 0:5c4d7b2438d3 923 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 924 return( ret );
switches 0:5c4d7b2438d3 925 }
switches 0:5c4d7b2438d3 926 } else
switches 0:5c4d7b2438d3 927 #endif /* MBEDTLS_ECP_C */
switches 0:5c4d7b2438d3 928 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 929
switches 0:5c4d7b2438d3 930 return( 0 );
switches 0:5c4d7b2438d3 931 }
switches 0:5c4d7b2438d3 932
switches 0:5c4d7b2438d3 933 /*
switches 0:5c4d7b2438d3 934 * Parse an encrypted PKCS#8 encoded private key
switches 0:5c4d7b2438d3 935 */
switches 0:5c4d7b2438d3 936 #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
switches 0:5c4d7b2438d3 937 static int pk_parse_key_pkcs8_encrypted_der(
switches 0:5c4d7b2438d3 938 mbedtls_pk_context *pk,
switches 0:5c4d7b2438d3 939 const unsigned char *key, size_t keylen,
switches 0:5c4d7b2438d3 940 const unsigned char *pwd, size_t pwdlen )
switches 0:5c4d7b2438d3 941 {
switches 0:5c4d7b2438d3 942 int ret, decrypted = 0;
switches 0:5c4d7b2438d3 943 size_t len;
switches 0:5c4d7b2438d3 944 unsigned char buf[2048];
switches 0:5c4d7b2438d3 945 unsigned char *p, *end;
switches 0:5c4d7b2438d3 946 mbedtls_asn1_buf pbe_alg_oid, pbe_params;
switches 0:5c4d7b2438d3 947 #if defined(MBEDTLS_PKCS12_C)
switches 0:5c4d7b2438d3 948 mbedtls_cipher_type_t cipher_alg;
switches 0:5c4d7b2438d3 949 mbedtls_md_type_t md_alg;
switches 0:5c4d7b2438d3 950 #endif
switches 0:5c4d7b2438d3 951
switches 0:5c4d7b2438d3 952 memset( buf, 0, sizeof( buf ) );
switches 0:5c4d7b2438d3 953
switches 0:5c4d7b2438d3 954 p = (unsigned char *) key;
switches 0:5c4d7b2438d3 955 end = p + keylen;
switches 0:5c4d7b2438d3 956
switches 0:5c4d7b2438d3 957 if( pwdlen == 0 )
switches 0:5c4d7b2438d3 958 return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
switches 0:5c4d7b2438d3 959
switches 0:5c4d7b2438d3 960 /*
switches 0:5c4d7b2438d3 961 * This function parses the EncryptedPrivatKeyInfo object (PKCS#8)
switches 0:5c4d7b2438d3 962 *
switches 0:5c4d7b2438d3 963 * EncryptedPrivateKeyInfo ::= SEQUENCE {
switches 0:5c4d7b2438d3 964 * encryptionAlgorithm EncryptionAlgorithmIdentifier,
switches 0:5c4d7b2438d3 965 * encryptedData EncryptedData
switches 0:5c4d7b2438d3 966 * }
switches 0:5c4d7b2438d3 967 *
switches 0:5c4d7b2438d3 968 * EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
switches 0:5c4d7b2438d3 969 *
switches 0:5c4d7b2438d3 970 * EncryptedData ::= OCTET STRING
switches 0:5c4d7b2438d3 971 *
switches 0:5c4d7b2438d3 972 * The EncryptedData OCTET STRING is a PKCS#8 PrivateKeyInfo
switches 0:5c4d7b2438d3 973 */
switches 0:5c4d7b2438d3 974 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 975 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 976 {
switches 0:5c4d7b2438d3 977 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 978 }
switches 0:5c4d7b2438d3 979
switches 0:5c4d7b2438d3 980 end = p + len;
switches 0:5c4d7b2438d3 981
switches 0:5c4d7b2438d3 982 if( ( ret = mbedtls_asn1_get_alg( &p, end, &pbe_alg_oid, &pbe_params ) ) != 0 )
switches 0:5c4d7b2438d3 983 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 984
switches 0:5c4d7b2438d3 985 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
switches 0:5c4d7b2438d3 986 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 987
switches 0:5c4d7b2438d3 988 if( len > sizeof( buf ) )
switches 0:5c4d7b2438d3 989 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
switches 0:5c4d7b2438d3 990
switches 0:5c4d7b2438d3 991 /*
switches 0:5c4d7b2438d3 992 * Decrypt EncryptedData with appropriate PDE
switches 0:5c4d7b2438d3 993 */
switches 0:5c4d7b2438d3 994 #if defined(MBEDTLS_PKCS12_C)
switches 0:5c4d7b2438d3 995 if( mbedtls_oid_get_pkcs12_pbe_alg( &pbe_alg_oid, &md_alg, &cipher_alg ) == 0 )
switches 0:5c4d7b2438d3 996 {
switches 0:5c4d7b2438d3 997 if( ( ret = mbedtls_pkcs12_pbe( &pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT,
switches 0:5c4d7b2438d3 998 cipher_alg, md_alg,
switches 0:5c4d7b2438d3 999 pwd, pwdlen, p, len, buf ) ) != 0 )
switches 0:5c4d7b2438d3 1000 {
switches 0:5c4d7b2438d3 1001 if( ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH )
switches 0:5c4d7b2438d3 1002 return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
switches 0:5c4d7b2438d3 1003
switches 0:5c4d7b2438d3 1004 return( ret );
switches 0:5c4d7b2438d3 1005 }
switches 0:5c4d7b2438d3 1006
switches 0:5c4d7b2438d3 1007 decrypted = 1;
switches 0:5c4d7b2438d3 1008 }
switches 0:5c4d7b2438d3 1009 else if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128, &pbe_alg_oid ) == 0 )
switches 0:5c4d7b2438d3 1010 {
switches 0:5c4d7b2438d3 1011 if( ( ret = mbedtls_pkcs12_pbe_sha1_rc4_128( &pbe_params,
switches 0:5c4d7b2438d3 1012 MBEDTLS_PKCS12_PBE_DECRYPT,
switches 0:5c4d7b2438d3 1013 pwd, pwdlen,
switches 0:5c4d7b2438d3 1014 p, len, buf ) ) != 0 )
switches 0:5c4d7b2438d3 1015 {
switches 0:5c4d7b2438d3 1016 return( ret );
switches 0:5c4d7b2438d3 1017 }
switches 0:5c4d7b2438d3 1018
switches 0:5c4d7b2438d3 1019 // Best guess for password mismatch when using RC4. If first tag is
switches 0:5c4d7b2438d3 1020 // not MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE
switches 0:5c4d7b2438d3 1021 //
switches 0:5c4d7b2438d3 1022 if( *buf != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
switches 0:5c4d7b2438d3 1023 return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
switches 0:5c4d7b2438d3 1024
switches 0:5c4d7b2438d3 1025 decrypted = 1;
switches 0:5c4d7b2438d3 1026 }
switches 0:5c4d7b2438d3 1027 else
switches 0:5c4d7b2438d3 1028 #endif /* MBEDTLS_PKCS12_C */
switches 0:5c4d7b2438d3 1029 #if defined(MBEDTLS_PKCS5_C)
switches 0:5c4d7b2438d3 1030 if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid ) == 0 )
switches 0:5c4d7b2438d3 1031 {
switches 0:5c4d7b2438d3 1032 if( ( ret = mbedtls_pkcs5_pbes2( &pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen,
switches 0:5c4d7b2438d3 1033 p, len, buf ) ) != 0 )
switches 0:5c4d7b2438d3 1034 {
switches 0:5c4d7b2438d3 1035 if( ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH )
switches 0:5c4d7b2438d3 1036 return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
switches 0:5c4d7b2438d3 1037
switches 0:5c4d7b2438d3 1038 return( ret );
switches 0:5c4d7b2438d3 1039 }
switches 0:5c4d7b2438d3 1040
switches 0:5c4d7b2438d3 1041 decrypted = 1;
switches 0:5c4d7b2438d3 1042 }
switches 0:5c4d7b2438d3 1043 else
switches 0:5c4d7b2438d3 1044 #endif /* MBEDTLS_PKCS5_C */
switches 0:5c4d7b2438d3 1045 {
switches 0:5c4d7b2438d3 1046 ((void) pwd);
switches 0:5c4d7b2438d3 1047 }
switches 0:5c4d7b2438d3 1048
switches 0:5c4d7b2438d3 1049 if( decrypted == 0 )
switches 0:5c4d7b2438d3 1050 return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
switches 0:5c4d7b2438d3 1051
switches 0:5c4d7b2438d3 1052 return( pk_parse_key_pkcs8_unencrypted_der( pk, buf, len ) );
switches 0:5c4d7b2438d3 1053 }
switches 0:5c4d7b2438d3 1054 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
switches 0:5c4d7b2438d3 1055
switches 0:5c4d7b2438d3 1056 /*
switches 0:5c4d7b2438d3 1057 * Parse a private key
switches 0:5c4d7b2438d3 1058 */
switches 0:5c4d7b2438d3 1059 int mbedtls_pk_parse_key( mbedtls_pk_context *pk,
switches 0:5c4d7b2438d3 1060 const unsigned char *key, size_t keylen,
switches 0:5c4d7b2438d3 1061 const unsigned char *pwd, size_t pwdlen )
switches 0:5c4d7b2438d3 1062 {
switches 0:5c4d7b2438d3 1063 int ret;
switches 0:5c4d7b2438d3 1064 const mbedtls_pk_info_t *pk_info;
switches 0:5c4d7b2438d3 1065
switches 0:5c4d7b2438d3 1066 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 1067 size_t len;
switches 0:5c4d7b2438d3 1068 mbedtls_pem_context pem;
switches 0:5c4d7b2438d3 1069
switches 0:5c4d7b2438d3 1070 mbedtls_pem_init( &pem );
switches 0:5c4d7b2438d3 1071
switches 0:5c4d7b2438d3 1072 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 1073 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
switches 0:5c4d7b2438d3 1074 if( keylen == 0 || key[keylen - 1] != '\0' )
switches 0:5c4d7b2438d3 1075 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
switches 0:5c4d7b2438d3 1076 else
switches 0:5c4d7b2438d3 1077 ret = mbedtls_pem_read_buffer( &pem,
switches 0:5c4d7b2438d3 1078 "-----BEGIN RSA PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1079 "-----END RSA PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1080 key, pwd, pwdlen, &len );
switches 0:5c4d7b2438d3 1081
switches 0:5c4d7b2438d3 1082 if( ret == 0 )
switches 0:5c4d7b2438d3 1083 {
switches 0:5c4d7b2438d3 1084 if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
switches 0:5c4d7b2438d3 1085 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 1086
switches 0:5c4d7b2438d3 1087 if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
switches 0:5c4d7b2438d3 1088 ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ),
switches 0:5c4d7b2438d3 1089 pem.buf, pem.buflen ) ) != 0 )
switches 0:5c4d7b2438d3 1090 {
switches 0:5c4d7b2438d3 1091 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1092 }
switches 0:5c4d7b2438d3 1093
switches 0:5c4d7b2438d3 1094 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 1095 return( ret );
switches 0:5c4d7b2438d3 1096 }
switches 0:5c4d7b2438d3 1097 else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
switches 0:5c4d7b2438d3 1098 return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
switches 0:5c4d7b2438d3 1099 else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
switches 0:5c4d7b2438d3 1100 return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
switches 0:5c4d7b2438d3 1101 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
switches 0:5c4d7b2438d3 1102 return( ret );
switches 0:5c4d7b2438d3 1103 #endif /* MBEDTLS_RSA_C */
switches 0:5c4d7b2438d3 1104
switches 0:5c4d7b2438d3 1105 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 1106 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
switches 0:5c4d7b2438d3 1107 if( keylen == 0 || key[keylen - 1] != '\0' )
switches 0:5c4d7b2438d3 1108 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
switches 0:5c4d7b2438d3 1109 else
switches 0:5c4d7b2438d3 1110 ret = mbedtls_pem_read_buffer( &pem,
switches 0:5c4d7b2438d3 1111 "-----BEGIN EC PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1112 "-----END EC PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1113 key, pwd, pwdlen, &len );
switches 0:5c4d7b2438d3 1114 if( ret == 0 )
switches 0:5c4d7b2438d3 1115 {
switches 0:5c4d7b2438d3 1116 if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
switches 0:5c4d7b2438d3 1117 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 1118
switches 0:5c4d7b2438d3 1119 if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
switches 0:5c4d7b2438d3 1120 ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
switches 0:5c4d7b2438d3 1121 pem.buf, pem.buflen ) ) != 0 )
switches 0:5c4d7b2438d3 1122 {
switches 0:5c4d7b2438d3 1123 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1124 }
switches 0:5c4d7b2438d3 1125
switches 0:5c4d7b2438d3 1126 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 1127 return( ret );
switches 0:5c4d7b2438d3 1128 }
switches 0:5c4d7b2438d3 1129 else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
switches 0:5c4d7b2438d3 1130 return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
switches 0:5c4d7b2438d3 1131 else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
switches 0:5c4d7b2438d3 1132 return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
switches 0:5c4d7b2438d3 1133 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
switches 0:5c4d7b2438d3 1134 return( ret );
switches 0:5c4d7b2438d3 1135 #endif /* MBEDTLS_ECP_C */
switches 0:5c4d7b2438d3 1136
switches 0:5c4d7b2438d3 1137 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
switches 0:5c4d7b2438d3 1138 if( keylen == 0 || key[keylen - 1] != '\0' )
switches 0:5c4d7b2438d3 1139 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
switches 0:5c4d7b2438d3 1140 else
switches 0:5c4d7b2438d3 1141 ret = mbedtls_pem_read_buffer( &pem,
switches 0:5c4d7b2438d3 1142 "-----BEGIN PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1143 "-----END PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1144 key, NULL, 0, &len );
switches 0:5c4d7b2438d3 1145 if( ret == 0 )
switches 0:5c4d7b2438d3 1146 {
switches 0:5c4d7b2438d3 1147 if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk,
switches 0:5c4d7b2438d3 1148 pem.buf, pem.buflen ) ) != 0 )
switches 0:5c4d7b2438d3 1149 {
switches 0:5c4d7b2438d3 1150 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1151 }
switches 0:5c4d7b2438d3 1152
switches 0:5c4d7b2438d3 1153 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 1154 return( ret );
switches 0:5c4d7b2438d3 1155 }
switches 0:5c4d7b2438d3 1156 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
switches 0:5c4d7b2438d3 1157 return( ret );
switches 0:5c4d7b2438d3 1158
switches 0:5c4d7b2438d3 1159 #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
switches 0:5c4d7b2438d3 1160 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
switches 0:5c4d7b2438d3 1161 if( keylen == 0 || key[keylen - 1] != '\0' )
switches 0:5c4d7b2438d3 1162 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
switches 0:5c4d7b2438d3 1163 else
switches 0:5c4d7b2438d3 1164 ret = mbedtls_pem_read_buffer( &pem,
switches 0:5c4d7b2438d3 1165 "-----BEGIN ENCRYPTED PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1166 "-----END ENCRYPTED PRIVATE KEY-----",
switches 0:5c4d7b2438d3 1167 key, NULL, 0, &len );
switches 0:5c4d7b2438d3 1168 if( ret == 0 )
switches 0:5c4d7b2438d3 1169 {
switches 0:5c4d7b2438d3 1170 if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk,
switches 0:5c4d7b2438d3 1171 pem.buf, pem.buflen,
switches 0:5c4d7b2438d3 1172 pwd, pwdlen ) ) != 0 )
switches 0:5c4d7b2438d3 1173 {
switches 0:5c4d7b2438d3 1174 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1175 }
switches 0:5c4d7b2438d3 1176
switches 0:5c4d7b2438d3 1177 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 1178 return( ret );
switches 0:5c4d7b2438d3 1179 }
switches 0:5c4d7b2438d3 1180 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
switches 0:5c4d7b2438d3 1181 return( ret );
switches 0:5c4d7b2438d3 1182 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
switches 0:5c4d7b2438d3 1183 #else
switches 0:5c4d7b2438d3 1184 ((void) ret);
switches 0:5c4d7b2438d3 1185 ((void) pwd);
switches 0:5c4d7b2438d3 1186 ((void) pwdlen);
switches 0:5c4d7b2438d3 1187 #endif /* MBEDTLS_PEM_PARSE_C */
switches 0:5c4d7b2438d3 1188
switches 0:5c4d7b2438d3 1189 /*
switches 0:5c4d7b2438d3 1190 * At this point we only know it's not a PEM formatted key. Could be any
switches 0:5c4d7b2438d3 1191 * of the known DER encoded private key formats
switches 0:5c4d7b2438d3 1192 *
switches 0:5c4d7b2438d3 1193 * We try the different DER format parsers to see if one passes without
switches 0:5c4d7b2438d3 1194 * error
switches 0:5c4d7b2438d3 1195 */
switches 0:5c4d7b2438d3 1196 #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
switches 0:5c4d7b2438d3 1197 if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, key, keylen,
switches 0:5c4d7b2438d3 1198 pwd, pwdlen ) ) == 0 )
switches 0:5c4d7b2438d3 1199 {
switches 0:5c4d7b2438d3 1200 return( 0 );
switches 0:5c4d7b2438d3 1201 }
switches 0:5c4d7b2438d3 1202
switches 0:5c4d7b2438d3 1203 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1204
switches 0:5c4d7b2438d3 1205 if( ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH )
switches 0:5c4d7b2438d3 1206 {
switches 0:5c4d7b2438d3 1207 return( ret );
switches 0:5c4d7b2438d3 1208 }
switches 0:5c4d7b2438d3 1209 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
switches 0:5c4d7b2438d3 1210
switches 0:5c4d7b2438d3 1211 if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen ) ) == 0 )
switches 0:5c4d7b2438d3 1212 return( 0 );
switches 0:5c4d7b2438d3 1213
switches 0:5c4d7b2438d3 1214 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1215
switches 0:5c4d7b2438d3 1216 #if defined(MBEDTLS_RSA_C)
switches 0:5c4d7b2438d3 1217 if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
switches 0:5c4d7b2438d3 1218 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 1219
switches 0:5c4d7b2438d3 1220 if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
switches 0:5c4d7b2438d3 1221 ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) ) == 0 )
switches 0:5c4d7b2438d3 1222 {
switches 0:5c4d7b2438d3 1223 return( 0 );
switches 0:5c4d7b2438d3 1224 }
switches 0:5c4d7b2438d3 1225
switches 0:5c4d7b2438d3 1226 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1227 #endif /* MBEDTLS_RSA_C */
switches 0:5c4d7b2438d3 1228
switches 0:5c4d7b2438d3 1229 #if defined(MBEDTLS_ECP_C)
switches 0:5c4d7b2438d3 1230 if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
switches 0:5c4d7b2438d3 1231 return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
switches 0:5c4d7b2438d3 1232
switches 0:5c4d7b2438d3 1233 if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
switches 0:5c4d7b2438d3 1234 ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), key, keylen ) ) == 0 )
switches 0:5c4d7b2438d3 1235 {
switches 0:5c4d7b2438d3 1236 return( 0 );
switches 0:5c4d7b2438d3 1237 }
switches 0:5c4d7b2438d3 1238
switches 0:5c4d7b2438d3 1239 mbedtls_pk_free( pk );
switches 0:5c4d7b2438d3 1240 #endif /* MBEDTLS_ECP_C */
switches 0:5c4d7b2438d3 1241
switches 0:5c4d7b2438d3 1242 return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
switches 0:5c4d7b2438d3 1243 }
switches 0:5c4d7b2438d3 1244
switches 0:5c4d7b2438d3 1245 /*
switches 0:5c4d7b2438d3 1246 * Parse a public key
switches 0:5c4d7b2438d3 1247 */
switches 0:5c4d7b2438d3 1248 int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
switches 0:5c4d7b2438d3 1249 const unsigned char *key, size_t keylen )
switches 0:5c4d7b2438d3 1250 {
switches 0:5c4d7b2438d3 1251 int ret;
switches 0:5c4d7b2438d3 1252 unsigned char *p;
switches 0:5c4d7b2438d3 1253 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 1254 size_t len;
switches 0:5c4d7b2438d3 1255 mbedtls_pem_context pem;
switches 0:5c4d7b2438d3 1256
switches 0:5c4d7b2438d3 1257 mbedtls_pem_init( &pem );
switches 0:5c4d7b2438d3 1258
switches 0:5c4d7b2438d3 1259 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
switches 0:5c4d7b2438d3 1260 if( keylen == 0 || key[keylen - 1] != '\0' )
switches 0:5c4d7b2438d3 1261 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
switches 0:5c4d7b2438d3 1262 else
switches 0:5c4d7b2438d3 1263 ret = mbedtls_pem_read_buffer( &pem,
switches 0:5c4d7b2438d3 1264 "-----BEGIN PUBLIC KEY-----",
switches 0:5c4d7b2438d3 1265 "-----END PUBLIC KEY-----",
switches 0:5c4d7b2438d3 1266 key, NULL, 0, &len );
switches 0:5c4d7b2438d3 1267
switches 0:5c4d7b2438d3 1268 if( ret == 0 )
switches 0:5c4d7b2438d3 1269 {
switches 0:5c4d7b2438d3 1270 /*
switches 0:5c4d7b2438d3 1271 * Was PEM encoded
switches 0:5c4d7b2438d3 1272 */
switches 0:5c4d7b2438d3 1273 key = pem.buf;
switches 0:5c4d7b2438d3 1274 keylen = pem.buflen;
switches 0:5c4d7b2438d3 1275 }
switches 0:5c4d7b2438d3 1276 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
switches 0:5c4d7b2438d3 1277 {
switches 0:5c4d7b2438d3 1278 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 1279 return( ret );
switches 0:5c4d7b2438d3 1280 }
switches 0:5c4d7b2438d3 1281 #endif /* MBEDTLS_PEM_PARSE_C */
switches 0:5c4d7b2438d3 1282 p = (unsigned char *) key;
switches 0:5c4d7b2438d3 1283
switches 0:5c4d7b2438d3 1284 ret = mbedtls_pk_parse_subpubkey( &p, p + keylen, ctx );
switches 0:5c4d7b2438d3 1285
switches 0:5c4d7b2438d3 1286 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 1287 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 1288 #endif
switches 0:5c4d7b2438d3 1289
switches 0:5c4d7b2438d3 1290 return( ret );
switches 0:5c4d7b2438d3 1291 }
switches 0:5c4d7b2438d3 1292
switches 0:5c4d7b2438d3 1293 #endif /* MBEDTLS_PK_PARSE_C */