A simple CyaSSL-based HMAC-MD5 implementation. Licensed under GPL v2.

Dependents:   RFrec_full RFtrans_full

The output will be base64-encoded, with trailing "==", like this:

j62o/jZsAZD9i9m+32lIuQ==

Example

#include "mbed.h"
#include "hmac_md5.h"

Serial pc(USBTX, USBRX); // tx, rx

void main(void)
{
    
    const char * key = "MySecretKey";
    
    const char * text = "message to be signed";
    
    char output[26];
    
    HMAC_MD5(key, text, output);

    printf("result = %s\n", output);

    while(true){}
}
Committer:
igrokhotkov
Date:
Wed Feb 06 20:35:03 2013 +0000
Revision:
0:83f3dcfa5c8f
initial revision

Who changed what in which revision?

UserRevisionLine numberNew contents of line
igrokhotkov 0:83f3dcfa5c8f 1 /* coding.c
igrokhotkov 0:83f3dcfa5c8f 2 *
igrokhotkov 0:83f3dcfa5c8f 3 * Copyright (C) 2006-2012 Sawtooth Consulting Ltd.
igrokhotkov 0:83f3dcfa5c8f 4 *
igrokhotkov 0:83f3dcfa5c8f 5 * This file is part of CyaSSL.
igrokhotkov 0:83f3dcfa5c8f 6 *
igrokhotkov 0:83f3dcfa5c8f 7 * CyaSSL is free software; you can redistribute it and/or modify
igrokhotkov 0:83f3dcfa5c8f 8 * it under the terms of the GNU General Public License as published by
igrokhotkov 0:83f3dcfa5c8f 9 * the Free Software Foundation; either version 2 of the License, or
igrokhotkov 0:83f3dcfa5c8f 10 * (at your option) any later version.
igrokhotkov 0:83f3dcfa5c8f 11 *
igrokhotkov 0:83f3dcfa5c8f 12 * CyaSSL is distributed in the hope that it will be useful,
igrokhotkov 0:83f3dcfa5c8f 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
igrokhotkov 0:83f3dcfa5c8f 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
igrokhotkov 0:83f3dcfa5c8f 15 * GNU General Public License for more details.
igrokhotkov 0:83f3dcfa5c8f 16 *
igrokhotkov 0:83f3dcfa5c8f 17 * You should have received a copy of the GNU General Public License
igrokhotkov 0:83f3dcfa5c8f 18 * along with this program; if not, write to the Free Software
igrokhotkov 0:83f3dcfa5c8f 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
igrokhotkov 0:83f3dcfa5c8f 20 */
igrokhotkov 0:83f3dcfa5c8f 21
igrokhotkov 0:83f3dcfa5c8f 22 #ifdef HAVE_CONFIG_H
igrokhotkov 0:83f3dcfa5c8f 23 #include <config.h>
igrokhotkov 0:83f3dcfa5c8f 24 #endif
igrokhotkov 0:83f3dcfa5c8f 25
igrokhotkov 0:83f3dcfa5c8f 26 #include "coding.h"
igrokhotkov 0:83f3dcfa5c8f 27 #include "error.h"
igrokhotkov 0:83f3dcfa5c8f 28 //#include "logging.h"
igrokhotkov 0:83f3dcfa5c8f 29
igrokhotkov 0:83f3dcfa5c8f 30
igrokhotkov 0:83f3dcfa5c8f 31 enum {
igrokhotkov 0:83f3dcfa5c8f 32 BAD = 0xFF, /* invalid encoding */
igrokhotkov 0:83f3dcfa5c8f 33 PAD = '=',
igrokhotkov 0:83f3dcfa5c8f 34 PEM_LINE_SZ = 64
igrokhotkov 0:83f3dcfa5c8f 35 };
igrokhotkov 0:83f3dcfa5c8f 36
igrokhotkov 0:83f3dcfa5c8f 37
igrokhotkov 0:83f3dcfa5c8f 38 static
igrokhotkov 0:83f3dcfa5c8f 39 const byte base64Decode[] = { 62, BAD, BAD, BAD, 63, /* + starts at 0x2B */
igrokhotkov 0:83f3dcfa5c8f 40 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
igrokhotkov 0:83f3dcfa5c8f 41 BAD, BAD, BAD, BAD, BAD, BAD, BAD,
igrokhotkov 0:83f3dcfa5c8f 42 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
igrokhotkov 0:83f3dcfa5c8f 43 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
igrokhotkov 0:83f3dcfa5c8f 44 20, 21, 22, 23, 24, 25,
igrokhotkov 0:83f3dcfa5c8f 45 BAD, BAD, BAD, BAD, BAD, BAD,
igrokhotkov 0:83f3dcfa5c8f 46 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
igrokhotkov 0:83f3dcfa5c8f 47 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
igrokhotkov 0:83f3dcfa5c8f 48 46, 47, 48, 49, 50, 51
igrokhotkov 0:83f3dcfa5c8f 49 };
igrokhotkov 0:83f3dcfa5c8f 50
igrokhotkov 0:83f3dcfa5c8f 51
igrokhotkov 0:83f3dcfa5c8f 52 int Base64_Decode(const byte* in, word32 inLen, byte* out, word32* outLen)
igrokhotkov 0:83f3dcfa5c8f 53 {
igrokhotkov 0:83f3dcfa5c8f 54 word32 i = 0;
igrokhotkov 0:83f3dcfa5c8f 55 word32 j = 0;
igrokhotkov 0:83f3dcfa5c8f 56 word32 plainSz = inLen - ((inLen + (PEM_LINE_SZ - 1)) / PEM_LINE_SZ );
igrokhotkov 0:83f3dcfa5c8f 57 const byte maxIdx = (byte)sizeof(base64Decode) + 0x2B - 1;
igrokhotkov 0:83f3dcfa5c8f 58
igrokhotkov 0:83f3dcfa5c8f 59 plainSz = (plainSz * 3 + 3) / 4;
igrokhotkov 0:83f3dcfa5c8f 60 if (plainSz > *outLen) return BAD_FUNC_ARG;
igrokhotkov 0:83f3dcfa5c8f 61
igrokhotkov 0:83f3dcfa5c8f 62 while (inLen > 3) {
igrokhotkov 0:83f3dcfa5c8f 63 byte b1, b2, b3;
igrokhotkov 0:83f3dcfa5c8f 64 byte e1 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 65 byte e2 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 66 byte e3 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 67 byte e4 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 68
igrokhotkov 0:83f3dcfa5c8f 69 int pad3 = 0;
igrokhotkov 0:83f3dcfa5c8f 70 int pad4 = 0;
igrokhotkov 0:83f3dcfa5c8f 71
igrokhotkov 0:83f3dcfa5c8f 72 if (e1 == 0) /* end file 0's */
igrokhotkov 0:83f3dcfa5c8f 73 break;
igrokhotkov 0:83f3dcfa5c8f 74 if (e3 == PAD)
igrokhotkov 0:83f3dcfa5c8f 75 pad3 = 1;
igrokhotkov 0:83f3dcfa5c8f 76 if (e4 == PAD)
igrokhotkov 0:83f3dcfa5c8f 77 pad4 = 1;
igrokhotkov 0:83f3dcfa5c8f 78
igrokhotkov 0:83f3dcfa5c8f 79 if (e1 < 0x2B || e2 < 0x2B || e3 < 0x2B || e4 < 0x2B) {
igrokhotkov 0:83f3dcfa5c8f 80 // CYASSL_MSG("Bad Base64 Decode data, too small");
igrokhotkov 0:83f3dcfa5c8f 81 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 82 }
igrokhotkov 0:83f3dcfa5c8f 83
igrokhotkov 0:83f3dcfa5c8f 84 if (e1 > maxIdx || e2 > maxIdx || e3 > maxIdx || e4 > maxIdx) {
igrokhotkov 0:83f3dcfa5c8f 85 // CYASSL_MSG("Bad Base64 Decode data, too big");
igrokhotkov 0:83f3dcfa5c8f 86 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 87 }
igrokhotkov 0:83f3dcfa5c8f 88
igrokhotkov 0:83f3dcfa5c8f 89 e1 = base64Decode[e1 - 0x2B];
igrokhotkov 0:83f3dcfa5c8f 90 e2 = base64Decode[e2 - 0x2B];
igrokhotkov 0:83f3dcfa5c8f 91 e3 = (e3 == PAD) ? 0 : base64Decode[e3 - 0x2B];
igrokhotkov 0:83f3dcfa5c8f 92 e4 = (e4 == PAD) ? 0 : base64Decode[e4 - 0x2B];
igrokhotkov 0:83f3dcfa5c8f 93
igrokhotkov 0:83f3dcfa5c8f 94 b1 = (e1 << 2) | (e2 >> 4);
igrokhotkov 0:83f3dcfa5c8f 95 b2 = ((e2 & 0xF) << 4) | (e3 >> 2);
igrokhotkov 0:83f3dcfa5c8f 96 b3 = ((e3 & 0x3) << 6) | e4;
igrokhotkov 0:83f3dcfa5c8f 97
igrokhotkov 0:83f3dcfa5c8f 98 out[i++] = b1;
igrokhotkov 0:83f3dcfa5c8f 99 if (!pad3)
igrokhotkov 0:83f3dcfa5c8f 100 out[i++] = b2;
igrokhotkov 0:83f3dcfa5c8f 101 if (!pad4)
igrokhotkov 0:83f3dcfa5c8f 102 out[i++] = b3;
igrokhotkov 0:83f3dcfa5c8f 103 else
igrokhotkov 0:83f3dcfa5c8f 104 break;
igrokhotkov 0:83f3dcfa5c8f 105
igrokhotkov 0:83f3dcfa5c8f 106 inLen -= 4;
igrokhotkov 0:83f3dcfa5c8f 107 if (in[j] == ' ' || in[j] == '\r' || in[j] == '\n') {
igrokhotkov 0:83f3dcfa5c8f 108 byte endLine = in[j++];
igrokhotkov 0:83f3dcfa5c8f 109 inLen--;
igrokhotkov 0:83f3dcfa5c8f 110 while (endLine == ' ') { /* allow trailing whitespace */
igrokhotkov 0:83f3dcfa5c8f 111 endLine = in[j++];
igrokhotkov 0:83f3dcfa5c8f 112 inLen--;
igrokhotkov 0:83f3dcfa5c8f 113 }
igrokhotkov 0:83f3dcfa5c8f 114 if (endLine == '\r') {
igrokhotkov 0:83f3dcfa5c8f 115 endLine = in[j++];
igrokhotkov 0:83f3dcfa5c8f 116 inLen--;
igrokhotkov 0:83f3dcfa5c8f 117 }
igrokhotkov 0:83f3dcfa5c8f 118 if (endLine != '\n') {
igrokhotkov 0:83f3dcfa5c8f 119 // CYASSL_MSG("Bad end of line in Base64 Decode");
igrokhotkov 0:83f3dcfa5c8f 120 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 121 }
igrokhotkov 0:83f3dcfa5c8f 122 }
igrokhotkov 0:83f3dcfa5c8f 123 }
igrokhotkov 0:83f3dcfa5c8f 124 *outLen = i;
igrokhotkov 0:83f3dcfa5c8f 125
igrokhotkov 0:83f3dcfa5c8f 126 return 0;
igrokhotkov 0:83f3dcfa5c8f 127 }
igrokhotkov 0:83f3dcfa5c8f 128
igrokhotkov 0:83f3dcfa5c8f 129
igrokhotkov 0:83f3dcfa5c8f 130
igrokhotkov 0:83f3dcfa5c8f 131 static
igrokhotkov 0:83f3dcfa5c8f 132 const byte base64Encode[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
igrokhotkov 0:83f3dcfa5c8f 133 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
igrokhotkov 0:83f3dcfa5c8f 134 'U', 'V', 'W', 'X', 'Y', 'Z',
igrokhotkov 0:83f3dcfa5c8f 135 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
igrokhotkov 0:83f3dcfa5c8f 136 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
igrokhotkov 0:83f3dcfa5c8f 137 'u', 'v', 'w', 'x', 'y', 'z',
igrokhotkov 0:83f3dcfa5c8f 138 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
igrokhotkov 0:83f3dcfa5c8f 139 '+', '/'
igrokhotkov 0:83f3dcfa5c8f 140 };
igrokhotkov 0:83f3dcfa5c8f 141
igrokhotkov 0:83f3dcfa5c8f 142
igrokhotkov 0:83f3dcfa5c8f 143 /* porting assistance from yaSSL by Raphael HUCK */
igrokhotkov 0:83f3dcfa5c8f 144 int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
igrokhotkov 0:83f3dcfa5c8f 145 {
igrokhotkov 0:83f3dcfa5c8f 146 word32 i = 0,
igrokhotkov 0:83f3dcfa5c8f 147 j = 0,
igrokhotkov 0:83f3dcfa5c8f 148 n = 0; /* new line counter */
igrokhotkov 0:83f3dcfa5c8f 149
igrokhotkov 0:83f3dcfa5c8f 150 word32 outSz = (inLen + 3 - 1) / 3 * 4;
igrokhotkov 0:83f3dcfa5c8f 151 outSz += (outSz + PEM_LINE_SZ - 1) / PEM_LINE_SZ; /* new lines */
igrokhotkov 0:83f3dcfa5c8f 152
igrokhotkov 0:83f3dcfa5c8f 153 if (outSz > *outLen) return BAD_FUNC_ARG;
igrokhotkov 0:83f3dcfa5c8f 154
igrokhotkov 0:83f3dcfa5c8f 155 while (inLen > 2) {
igrokhotkov 0:83f3dcfa5c8f 156 byte b1 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 157 byte b2 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 158 byte b3 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 159
igrokhotkov 0:83f3dcfa5c8f 160 /* encoded idx */
igrokhotkov 0:83f3dcfa5c8f 161 byte e1 = b1 >> 2;
igrokhotkov 0:83f3dcfa5c8f 162 byte e2 = ((b1 & 0x3) << 4) | (b2 >> 4);
igrokhotkov 0:83f3dcfa5c8f 163 byte e3 = ((b2 & 0xF) << 2) | (b3 >> 6);
igrokhotkov 0:83f3dcfa5c8f 164 byte e4 = b3 & 0x3F;
igrokhotkov 0:83f3dcfa5c8f 165
igrokhotkov 0:83f3dcfa5c8f 166 /* store */
igrokhotkov 0:83f3dcfa5c8f 167 out[i++] = base64Encode[e1];
igrokhotkov 0:83f3dcfa5c8f 168 out[i++] = base64Encode[e2];
igrokhotkov 0:83f3dcfa5c8f 169 out[i++] = base64Encode[e3];
igrokhotkov 0:83f3dcfa5c8f 170 out[i++] = base64Encode[e4];
igrokhotkov 0:83f3dcfa5c8f 171
igrokhotkov 0:83f3dcfa5c8f 172 inLen -= 3;
igrokhotkov 0:83f3dcfa5c8f 173
igrokhotkov 0:83f3dcfa5c8f 174 if ((++n % (PEM_LINE_SZ / 4)) == 0 && inLen)
igrokhotkov 0:83f3dcfa5c8f 175 out[i++] = '\n';
igrokhotkov 0:83f3dcfa5c8f 176 }
igrokhotkov 0:83f3dcfa5c8f 177
igrokhotkov 0:83f3dcfa5c8f 178 /* last integral */
igrokhotkov 0:83f3dcfa5c8f 179 if (inLen) {
igrokhotkov 0:83f3dcfa5c8f 180 int twoBytes = (inLen == 2);
igrokhotkov 0:83f3dcfa5c8f 181
igrokhotkov 0:83f3dcfa5c8f 182 byte b1 = in[j++];
igrokhotkov 0:83f3dcfa5c8f 183 byte b2 = (twoBytes) ? in[j++] : 0;
igrokhotkov 0:83f3dcfa5c8f 184
igrokhotkov 0:83f3dcfa5c8f 185 byte e1 = b1 >> 2;
igrokhotkov 0:83f3dcfa5c8f 186 byte e2 = ((b1 & 0x3) << 4) | (b2 >> 4);
igrokhotkov 0:83f3dcfa5c8f 187 byte e3 = (b2 & 0xF) << 2;
igrokhotkov 0:83f3dcfa5c8f 188
igrokhotkov 0:83f3dcfa5c8f 189 out[i++] = base64Encode[e1];
igrokhotkov 0:83f3dcfa5c8f 190 out[i++] = base64Encode[e2];
igrokhotkov 0:83f3dcfa5c8f 191 out[i++] = (twoBytes) ? base64Encode[e3] : PAD;
igrokhotkov 0:83f3dcfa5c8f 192 out[i++] = PAD;
igrokhotkov 0:83f3dcfa5c8f 193 }
igrokhotkov 0:83f3dcfa5c8f 194
igrokhotkov 0:83f3dcfa5c8f 195 out[i++] = '\n';
igrokhotkov 0:83f3dcfa5c8f 196 if (i != outSz)
igrokhotkov 0:83f3dcfa5c8f 197 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 198 *outLen = outSz;
igrokhotkov 0:83f3dcfa5c8f 199
igrokhotkov 0:83f3dcfa5c8f 200 return 0;
igrokhotkov 0:83f3dcfa5c8f 201 }
igrokhotkov 0:83f3dcfa5c8f 202
igrokhotkov 0:83f3dcfa5c8f 203 #if defined(OPENSSL_EXTRA) || defined (SESSION_CERTS) || defined(CYASSL_KEY_GEN) || defined(CYASSL_CERT_GEN) || defined(HAVE_WEBSERVER)
igrokhotkov 0:83f3dcfa5c8f 204
igrokhotkov 0:83f3dcfa5c8f 205 static
igrokhotkov 0:83f3dcfa5c8f 206 const byte hexDecode[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
igrokhotkov 0:83f3dcfa5c8f 207 BAD, BAD, BAD, BAD, BAD, BAD, BAD,
igrokhotkov 0:83f3dcfa5c8f 208 10, 11, 12, 13, 14, 15
igrokhotkov 0:83f3dcfa5c8f 209 }; /* A starts at 0x41 not 0x3A */
igrokhotkov 0:83f3dcfa5c8f 210
igrokhotkov 0:83f3dcfa5c8f 211 int Base16_Decode(const byte* in, word32 inLen, byte* out, word32* outLen)
igrokhotkov 0:83f3dcfa5c8f 212 {
igrokhotkov 0:83f3dcfa5c8f 213 word32 inIdx = 0;
igrokhotkov 0:83f3dcfa5c8f 214 word32 outIdx = 0;
igrokhotkov 0:83f3dcfa5c8f 215
igrokhotkov 0:83f3dcfa5c8f 216 if (inLen == 1 && *outLen && in) {
igrokhotkov 0:83f3dcfa5c8f 217 byte b = in[inIdx++] - 0x30; /* 0 starts at 0x30 */
igrokhotkov 0:83f3dcfa5c8f 218
igrokhotkov 0:83f3dcfa5c8f 219 /* sanity check */
igrokhotkov 0:83f3dcfa5c8f 220 if (b >= sizeof(hexDecode)/sizeof(hexDecode[0]))
igrokhotkov 0:83f3dcfa5c8f 221 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 222
igrokhotkov 0:83f3dcfa5c8f 223 b = hexDecode[b];
igrokhotkov 0:83f3dcfa5c8f 224
igrokhotkov 0:83f3dcfa5c8f 225 if (b == BAD)
igrokhotkov 0:83f3dcfa5c8f 226 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 227
igrokhotkov 0:83f3dcfa5c8f 228 out[outIdx++] = b;
igrokhotkov 0:83f3dcfa5c8f 229
igrokhotkov 0:83f3dcfa5c8f 230 *outLen = outIdx;
igrokhotkov 0:83f3dcfa5c8f 231 return 0;
igrokhotkov 0:83f3dcfa5c8f 232 }
igrokhotkov 0:83f3dcfa5c8f 233
igrokhotkov 0:83f3dcfa5c8f 234 if (inLen % 2)
igrokhotkov 0:83f3dcfa5c8f 235 return BAD_FUNC_ARG;
igrokhotkov 0:83f3dcfa5c8f 236
igrokhotkov 0:83f3dcfa5c8f 237 if (*outLen < (inLen / 2))
igrokhotkov 0:83f3dcfa5c8f 238 return BAD_FUNC_ARG;
igrokhotkov 0:83f3dcfa5c8f 239
igrokhotkov 0:83f3dcfa5c8f 240 while (inLen) {
igrokhotkov 0:83f3dcfa5c8f 241 byte b = in[inIdx++] - 0x30; /* 0 starts at 0x30 */
igrokhotkov 0:83f3dcfa5c8f 242 byte b2 = in[inIdx++] - 0x30;
igrokhotkov 0:83f3dcfa5c8f 243
igrokhotkov 0:83f3dcfa5c8f 244 /* sanity checks */
igrokhotkov 0:83f3dcfa5c8f 245 if (b >= sizeof(hexDecode)/sizeof(hexDecode[0]))
igrokhotkov 0:83f3dcfa5c8f 246 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 247 if (b2 >= sizeof(hexDecode)/sizeof(hexDecode[0]))
igrokhotkov 0:83f3dcfa5c8f 248 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 249
igrokhotkov 0:83f3dcfa5c8f 250 b = hexDecode[b];
igrokhotkov 0:83f3dcfa5c8f 251 b2 = hexDecode[b2];
igrokhotkov 0:83f3dcfa5c8f 252
igrokhotkov 0:83f3dcfa5c8f 253 if (b == BAD || b2 == BAD)
igrokhotkov 0:83f3dcfa5c8f 254 return ASN_INPUT_E;
igrokhotkov 0:83f3dcfa5c8f 255
igrokhotkov 0:83f3dcfa5c8f 256 out[outIdx++] = (b << 4) | b2;
igrokhotkov 0:83f3dcfa5c8f 257 inLen -= 2;
igrokhotkov 0:83f3dcfa5c8f 258 }
igrokhotkov 0:83f3dcfa5c8f 259
igrokhotkov 0:83f3dcfa5c8f 260 *outLen = outIdx;
igrokhotkov 0:83f3dcfa5c8f 261 return 0;
igrokhotkov 0:83f3dcfa5c8f 262 }
igrokhotkov 0:83f3dcfa5c8f 263
igrokhotkov 0:83f3dcfa5c8f 264
igrokhotkov 0:83f3dcfa5c8f 265 #endif /* defined(OPENSSL_EXTRA) || defined (SESSION_CERTS) || defined(CYASSL_KEY_GEN) || defined(CYASSL_CERT_GEN) || defined(HAVE_WEBSERVER) */