Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame^] | 1 | /* |
| 2 | Copyright (C) 2005, 2004 Erik Eliasson, Johan Bilien |
| 3 | |
| 4 | This library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | This library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with this library; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * Authors: Erik Eliasson <eliasson@it.kth.se> |
| 21 | * Johan Bilien <jobi@via.ecp.fr> |
| 22 | */ |
| 23 | #include <gcrypt.h> |
| 24 | |
| 25 | #include <ccrtp/crypto/hmac.h> |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | void hmac_sha1(uint8* key, int32 keyLength, |
| 29 | const uint8* data, int32 dataLength, |
| 30 | uint8* mac, int32* macLength) |
| 31 | { |
| 32 | gcry_md_hd_t hd; |
| 33 | gcry_error_t err = 0; |
| 34 | |
| 35 | err = gcry_md_open(&hd, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC); |
| 36 | gcry_md_setkey(hd, key, keyLength); |
| 37 | |
| 38 | gcry_md_write (hd, data, dataLength); |
| 39 | |
| 40 | uint8_t* p = gcry_md_read (hd, GCRY_MD_SHA1); |
| 41 | memcpy(mac, p, SHA1_DIGEST_LENGTH); |
| 42 | if (macLength != NULL) { |
| 43 | *macLength = SHA1_DIGEST_LENGTH; |
| 44 | } |
| 45 | gcry_md_close (hd); |
| 46 | } |
| 47 | |
| 48 | void hmac_sha1( uint8* key, int32 keyLength, |
| 49 | const uint8* dataChunks[], |
| 50 | uint32 dataChunkLength[], |
| 51 | uint8* mac, int32* macLength ) |
| 52 | { |
| 53 | gcry_md_hd_t hd; |
| 54 | gcry_error_t err = 0; |
| 55 | |
| 56 | err = gcry_md_open(&hd, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC); |
| 57 | gcry_md_setkey(hd, key, keyLength); |
| 58 | |
| 59 | while (*dataChunks) { |
| 60 | gcry_md_write (hd, *dataChunks, (uint32)(*dataChunkLength)); |
| 61 | dataChunks++; |
| 62 | dataChunkLength++; |
| 63 | } |
| 64 | uint8_t* p = gcry_md_read (hd, GCRY_MD_SHA1); |
| 65 | memcpy(mac, p, SHA1_DIGEST_LENGTH); |
| 66 | if (macLength != NULL) { |
| 67 | *macLength = SHA1_DIGEST_LENGTH; |
| 68 | } |
| 69 | gcry_md_close (hd); |
| 70 | } |
| 71 | |
| 72 | void* createSha1HmacContext(uint8_t* key, int32_t key_length) |
| 73 | { |
| 74 | gcry_md_hd_t ctx; |
| 75 | gcry_error_t err = 0; |
| 76 | |
| 77 | err = gcry_md_open(&ctx, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC); |
| 78 | gcry_md_setkey(ctx, key, key_length); |
| 79 | return ctx; |
| 80 | } |
| 81 | |
| 82 | void hmacSha1Ctx(void* ctx, const uint8_t* data, uint32_t data_length, |
| 83 | uint8_t* mac, int32_t* mac_length) |
| 84 | { |
| 85 | gcry_md_hd_t pctx = (gcry_md_hd_t)ctx; |
| 86 | |
| 87 | gcry_md_reset(pctx); |
| 88 | |
| 89 | gcry_md_write (pctx, data, data_length); |
| 90 | |
| 91 | uint8_t* p = gcry_md_read (pctx, GCRY_MD_SHA1); |
| 92 | memcpy(mac, p, SHA1_DIGEST_LENGTH); |
| 93 | if (mac_length != NULL) { |
| 94 | *mac_length = SHA1_DIGEST_LENGTH; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | void hmacSha1Ctx(void* ctx, const uint8_t* data[], uint32_t data_length[], |
| 99 | uint8_t* mac, int32_t* mac_length ) |
| 100 | { |
| 101 | gcry_md_hd_t pctx = (gcry_md_hd_t)ctx; |
| 102 | |
| 103 | gcry_md_reset (pctx); |
| 104 | while (*data) { |
| 105 | gcry_md_write (pctx, *data, (uint32)(*data_length)); |
| 106 | data++; |
| 107 | data_length++; |
| 108 | } |
| 109 | uint8_t* p = gcry_md_read (pctx, GCRY_MD_SHA1); |
| 110 | memcpy(mac, p, SHA1_DIGEST_LENGTH); |
| 111 | if (mac_length != NULL) { |
| 112 | *mac_length = SHA1_DIGEST_LENGTH; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | void freeSha1HmacContext(void* ctx) |
| 117 | { |
| 118 | gcry_md_hd_t pctx = (gcry_md_hd_t)ctx; |
| 119 | gcry_md_close (pctx); |
| 120 | } |