| 1 | /* |
| 2 | * Copyright (c) 2007, Cameron Rich |
| 3 | * |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are met: |
| 8 | * |
| 9 | * * Redistributions of source code must retain the above copyright notice, |
| 10 | * this list of conditions and the following disclaimer. |
| 11 | * * Redistributions in binary form must reproduce the above copyright notice, |
| 12 | * this list of conditions and the following disclaimer in the documentation |
| 13 | * and/or other materials provided with the distribution. |
| 14 | * * Neither the name of the axTLS project nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this software |
| 16 | * without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 22 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 24 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 25 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 26 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 27 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 28 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | /** |
| 32 | * @file crypto.h |
| 33 | */ |
| 34 | |
| 35 | #ifndef HEADER_CRYPTO_H |
| 36 | #define HEADER_CRYPTO_H |
| 37 | |
| 38 | #ifdef __cplusplus |
| 39 | extern "C" { |
| 40 | #endif |
| 41 | |
| 42 | #include "config.h" |
| 43 | #include "bigint_impl.h" |
| 44 | #include "bigint.h" |
| 45 | |
| 46 | #ifndef STDCALL |
| 47 | #define STDCALL |
| 48 | #endif |
| 49 | #ifndef EXP_FUNC |
| 50 | #define EXP_FUNC |
| 51 | #endif |
| 52 | |
| 53 | /************************************************************************** |
| 54 | * AES declarations |
| 55 | **************************************************************************/ |
| 56 | |
| 57 | #define AES_MAXROUNDS 14 |
| 58 | #define AES_BLOCKSIZE 16 |
| 59 | #define AES_IV_SIZE 16 |
| 60 | |
| 61 | typedef struct aes_key_st |
| 62 | { |
| 63 | uint16_t rounds; |
| 64 | uint16_t key_size; |
| 65 | uint32_t ks[(AES_MAXROUNDS+1)*8]; |
| 66 | uint8_t iv[AES_IV_SIZE]; |
| 67 | } AES_CTX; |
| 68 | |
| 69 | typedef enum |
| 70 | { |
| 71 | AES_MODE_128, |
| 72 | AES_MODE_256 |
| 73 | } AES_MODE; |
| 74 | |
| 75 | void AES_set_key(AES_CTX *ctx, const uint8_t *key, |
| 76 | const uint8_t *iv, AES_MODE mode); |
| 77 | void AES_cbc_encrypt(AES_CTX *ctx, const uint8_t *msg, |
| 78 | uint8_t *out, int length); |
| 79 | void AES_cbc_decrypt(AES_CTX *ks, const uint8_t *in, uint8_t *out, int length); |
| 80 | void AES_convert_key(AES_CTX *ctx); |
| 81 | |
| 82 | /************************************************************************** |
| 83 | * RC4 declarations |
| 84 | **************************************************************************/ |
| 85 | |
| 86 | typedef struct |
| 87 | { |
| 88 | uint8_t x, y, m[256]; |
| 89 | } RC4_CTX; |
| 90 | |
| 91 | void RC4_setup(RC4_CTX *s, const uint8_t *key, int length); |
| 92 | void RC4_crypt(RC4_CTX *s, const uint8_t *msg, uint8_t *data, int length); |
| 93 | |
| 94 | /************************************************************************** |
| 95 | * SHA1 declarations |
| 96 | **************************************************************************/ |
| 97 | |
| 98 | #define SHA1_SIZE 20 |
| 99 | |
| 100 | /* |
| 101 | * This structure will hold context information for the SHA-1 |
| 102 | * hashing operation |
| 103 | */ |
| 104 | typedef struct |
| 105 | { |
| 106 | uint32_t Intermediate_Hash[SHA1_SIZE/4]; /* Message Digest */ |
| 107 | uint32_t Length_Low; /* Message length in bits */ |
| 108 | uint32_t Length_High; /* Message length in bits */ |
| 109 | uint16_t Message_Block_Index; /* Index into message block array */ |
| 110 | uint8_t Message_Block[64]; /* 512-bit message blocks */ |
| 111 | } SHA1_CTX; |
| 112 | |
| 113 | void SHA1_Init(SHA1_CTX *); |
| 114 | void SHA1_Update(SHA1_CTX *, const uint8_t * msg, int len); |
| 115 | void SHA1_Final(uint8_t *digest, SHA1_CTX *); |
| 116 | |
| 117 | /************************************************************************** |
| 118 | * MD5 declarations |
| 119 | **************************************************************************/ |
| 120 | |
| 121 | #define MD5_SIZE 16 |
| 122 | |
| 123 | typedef struct |
| 124 | { |
| 125 | uint32_t state[4]; /* state (ABCD) */ |
| 126 | uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */ |
| 127 | uint8_t buffer[64]; /* input buffer */ |
| 128 | } MD5_CTX; |
| 129 | |
| 130 | EXP_FUNC void STDCALL MD5_Init(MD5_CTX *); |
| 131 | EXP_FUNC void STDCALL MD5_Update(MD5_CTX *, const uint8_t *msg, int len); |
| 132 | EXP_FUNC void STDCALL MD5_Final(uint8_t *digest, MD5_CTX *); |
| 133 | |
| 134 | /************************************************************************** |
| 135 | * HMAC declarations |
| 136 | **************************************************************************/ |
| 137 | void hmac_md5(const uint8_t *msg, int length, const uint8_t *key, |
| 138 | int key_len, uint8_t *digest); |
| 139 | void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key, |
| 140 | int key_len, uint8_t *digest); |
| 141 | |
| 142 | #ifdef __cplusplus |
| 143 | } |
| 144 | #endif |
| 145 | |
| 146 | #endif |