Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | /* |
| 2 | Copyright (C) 2010 Werner Dittmann |
| 3 | |
| 4 | This program is free software: you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation, either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program 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 |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | |
| 19 | #ifndef MAC_SKEIN_H |
| 20 | #define MAC_SKEIN_H |
| 21 | |
| 22 | #include <ccrtp/crypto/skeinApi.h> |
| 23 | /** |
| 24 | * @file macSkein.h |
| 25 | * @brief Function that provide Skein MAC support |
| 26 | * |
| 27 | * |
| 28 | * Functions to compute Skein MAC. |
| 29 | * |
| 30 | * @ingroup GNU_ZRTP |
| 31 | * @{ |
| 32 | */ |
| 33 | |
| 34 | /** |
| 35 | * Compute Skein MAC. |
| 36 | * |
| 37 | * This functions takes one data chunk and computes its Skein MAC. |
| 38 | * |
| 39 | * @param key |
| 40 | * The MAC key. |
| 41 | * @param key_length |
| 42 | * Lneght of the MAC key in bytes |
| 43 | * @param data |
| 44 | * Points to the data chunk. |
| 45 | * @param data_length |
| 46 | * Length of the data in bytes |
| 47 | * @param mac |
| 48 | * Points to a buffer that receives the computed digest. |
| 49 | * @param mac_length |
| 50 | * Integer that contains the length of the MAC in bits (not bytes). |
| 51 | * @param skeinSize |
| 52 | * The Skein size to use. |
| 53 | */ |
| 54 | void macSkein( uint8_t* key, int32_t key_length, |
| 55 | const uint8_t* data, uint32_t data_length, |
| 56 | uint8_t* mac, int32_t mac_length, SkeinSize_t skeinSize ); |
| 57 | |
| 58 | /** |
| 59 | * Compute Skein MAC over several data cunks. |
| 60 | * |
| 61 | * This functions takes several data chunk and computes the Skein MAC. |
| 62 | * |
| 63 | * @param key |
| 64 | * The MAC key. |
| 65 | * @param key_length |
| 66 | * Lneght of the MAC key in bytes |
| 67 | * @param data |
| 68 | * Points to an array of pointers that point to the data chunks. A NULL |
| 69 | * pointer in an array element terminates the data chunks. |
| 70 | * @param data_length |
| 71 | * Points to an array of integers that hold the length of each data chunk. |
| 72 | * @param mac |
| 73 | * Points to a buffer that receives the computed digest. |
| 74 | * @param mac_length |
| 75 | * Integer that contains the length of the MAC in bits (not bytes). |
| 76 | * @param skeinSize |
| 77 | * The Skein size to use. |
| 78 | */ |
| 79 | void macSkein( uint8_t* key, int32_t key_length, |
| 80 | const uint8_t* data[], uint32_t data_length[], |
| 81 | uint8_t* mac, int32_t mac_length, SkeinSize_t skeinSize); |
| 82 | |
| 83 | /** |
| 84 | * Create and initialize a Skein MAC context. |
| 85 | * |
| 86 | * An application uses this context to hash several data with on Skein MAC |
| 87 | * Context with the same key, key length and mac length |
| 88 | * |
| 89 | * @param key |
| 90 | * The MAC key. |
| 91 | * @param key_length |
| 92 | * Lenght of the MAC key in bytes |
| 93 | * @param mac_length |
| 94 | * Integer that contains the length of the MAC in bits (not bytes). |
| 95 | * @param skeinSize |
| 96 | * The Skein size to use. |
| 97 | * @return Returns a pointer to the initialized context |
| 98 | */ |
| 99 | void* createSkeinMacContext(uint8_t* key, int32_t key_length, |
| 100 | int32_t mac_length, SkeinSize_t skeinSize); |
| 101 | |
| 102 | /** |
| 103 | * Compute Skein MAC. |
| 104 | * |
| 105 | * This functions takes one data chunk and computes its Skein MAC. |
| 106 | * |
| 107 | * @param ctx |
| 108 | * Pointer to initialized Skein MAC context |
| 109 | * @param data |
| 110 | * Points to the data chunk. |
| 111 | * @param data_length |
| 112 | * Length of the data in bytes |
| 113 | * @param mac |
| 114 | * Points to a buffer that receives the computed digest. |
| 115 | */ |
| 116 | |
| 117 | void macSkeinCtx(void* ctx, const uint8_t* data, uint32_t data_length, |
| 118 | uint8_t* mac); |
| 119 | |
| 120 | /** |
| 121 | * Compute Skein MAC over several data cunks. |
| 122 | * |
| 123 | * This functions takes several data chunk and computes the SHA1 HAMAC. |
| 124 | * |
| 125 | * @param ctx |
| 126 | * Pointer to initialized Skein MAC context |
| 127 | * @param data |
| 128 | * Points to an array of pointers that point to the data chunks. A NULL |
| 129 | * pointer in an array element terminates the data chunks. |
| 130 | * @param data_length |
| 131 | * Points to an array of integers that hold the length of each data chunk. |
| 132 | * @param mac |
| 133 | * Points to a buffer that receives the computed digest. |
| 134 | */ |
| 135 | void macSkeinCtx(void* ctx, const uint8_t* data[], uint32_t data_length[], |
| 136 | uint8_t* mac); |
| 137 | |
| 138 | /** |
| 139 | * Free Skein MAC context. |
| 140 | * |
| 141 | * @param ctx a pointer to Skein MAC context |
| 142 | */ |
| 143 | void freeSkeinMacContext(void* ctx); |
| 144 | |
| 145 | /** |
| 146 | * @} |
| 147 | */ |
| 148 | #endif |