1 /* 2 --------------------------------------------------------------------------- 3 Copyright (c) 2002, Dr Brian Gladman, Worcester, UK. All rights reserved. 4 5 LICENSE TERMS 6 7 The free distribution and use of this software in both source and binary 8 form is allowed (with or without changes) provided that: 9 10 1. distributions of this source code include the above copyright 11 notice, this list of conditions and the following disclaimer; 12 13 2. distributions in binary form include the above copyright 14 notice, this list of conditions and the following disclaimer 15 in the documentation and/or other associated materials; 16 17 3. the copyright holder's name is not used to endorse products 18 built using this software without specific written permission. 19 20 ALTERNATIVELY, provided that this notice is retained in full, this product 21 may be distributed under the terms of the GNU General Public License (GPL), 22 in which case the provisions of the GPL apply INSTEAD OF those given above. 23 24 DISCLAIMER 25 26 This software is provided 'as is' with no explicit or implied warranties 27 in respect of its properties, including, but not limited to, correctness 28 and/or fitness for purpose. 29 --------------------------------------------------------------------------- 30 Issue Date: 01/08/2005 31 */ 32 33 #ifndef _SHA2_H 34 #define _SHA2_H 35 36 #include <stdlib.h> 37 38 #define SHA_64BIT 39 40 /* define the hash functions that you need */ 41 #define SHA_2 /* for dynamic hash length */ 42 #define SHA_224 43 #define SHA_256 44 #ifdef SHA_64BIT 45 # define SHA_384 46 # define SHA_512 47 # define NEED_UINT_64T 48 #endif 49 50 #include <cryptcommon/brg_types.h> 51 52 #if defined(__cplusplus) 53 extern "C" 54 { 55 #endif 56 57 /* Note that the following function prototypes are the same */ 58 /* for both the bit and byte oriented implementations. But */ 59 /* the length fields are in bytes or bits as is appropriate */ 60 /* for the version used. Bit sequences are arrays of bytes */ 61 /* in which bit sequence indexes increase from the most to */ 62 /* the least significant end of each byte */ 63 64 #define SHA224_DIGEST_SIZE 28 65 #define SHA224_BLOCK_SIZE 64 66 #define SHA256_DIGEST_SIZE 32 67 #define SHA256_BLOCK_SIZE 64 68 69 /* type to hold the SHA256 (and SHA224) context */ 70 71 typedef struct 72 { uint_32t count[2]; 73 uint_32t hash[8]; 74 uint_32t wbuf[16]; 75 } sha256_ctx; 76 77 typedef sha256_ctx sha224_ctx; 78 79 VOID_RETURN sha256_compile(sha256_ctx ctx[1]); 80 81 VOID_RETURN sha224_begin(sha224_ctx ctx[1]); 82 #define sha224_hash sha256_hash 83 VOID_RETURN sha224_end(unsigned char hval[], sha224_ctx ctx[1]); 84 VOID_RETURN sha224_zrtp(unsigned char hval[], const unsigned char data[], unsigned long len); 85 86 VOID_RETURN sha256_begin(sha256_ctx ctx[1]); 87 VOID_RETURN sha256_hash(const unsigned char data[], unsigned long len, sha256_ctx ctx[1]); 88 VOID_RETURN sha256_end(unsigned char hval[], sha256_ctx ctx[1]); 89 VOID_RETURN sha256_zrtp(unsigned char hval[], const unsigned char data[], unsigned long len); 90 91 #ifndef SHA_64BIT 92 93 typedef struct 94 { union 95 { sha256_ctx ctx256[1]; 96 } uu[1]; 97 uint_32t sha2_len; 98 } sha2_ctx; 99 100 #define SHA2_MAX_DIGEST_SIZE SHA256_DIGEST_SIZE 101 102 #else 103 104 #define SHA384_DIGEST_SIZE 48 105 #define SHA384_BLOCK_SIZE 128 106 #define SHA512_DIGEST_SIZE 64 107 #define SHA512_BLOCK_SIZE 128 108 #define SHA2_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE 109 110 /* type to hold the SHA384 (and SHA512) context */ 111 112 typedef struct 113 { uint_64t count[2]; 114 uint_64t hash[8]; 115 uint_64t wbuf[16]; 116 } sha512_ctx; 117 118 typedef sha512_ctx sha384_ctx; 119 120 typedef struct 121 { union 122 { sha256_ctx ctx256[1]; 123 sha512_ctx ctx512[1]; 124 } uu[1]; 125 uint_32t sha2_len; 126 } sha2_ctx; 127 128 VOID_RETURN sha512_compile(sha512_ctx ctx[1]); 129 130 VOID_RETURN sha384_begin(sha384_ctx ctx[1]); 131 #define sha384_hash sha512_hash 132 VOID_RETURN sha384_end(unsigned char hval[], sha384_ctx ctx[1]); 133 VOID_RETURN sha384_zrtp(unsigned char hval[], const unsigned char data[], unsigned long len); 134 135 VOID_RETURN sha512_begin(sha512_ctx ctx[1]); 136 VOID_RETURN sha512_hash(const unsigned char data[], unsigned long len, sha512_ctx ctx[1]); 137 VOID_RETURN sha512_end(unsigned char hval[], sha512_ctx ctx[1]); 138 VOID_RETURN sha512_zrtp(unsigned char hval[], const unsigned char data[], unsigned long len); 139 140 INT_RETURN sha2_begin(unsigned long size, sha2_ctx ctx[1]); 141 VOID_RETURN sha2_hash(const unsigned char data[], unsigned long len, sha2_ctx ctx[1]); 142 VOID_RETURN sha2_end(unsigned char hval[], sha2_ctx ctx[1]); 143 INT_RETURN sha2_all(unsigned char hval[], unsigned long size, const unsigned char data[], unsigned long len); 144 145 #endif 146 147 #if defined(__cplusplus) 148 } 149 #endif 150 151 #endif 152