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Annotation of truecrypt/crypto/sha2.h, revision 1.1

1.1     ! root        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 "Common/Tcdefs.h"
        !            37: #include "Common/Endian.h"
        !            38: 
        !            39: #define SHA_64BIT
        !            40: 
        !            41: /* define the hash functions that you need  */
        !            42: #define SHA_2   /* for dynamic hash length  */
        !            43: #define SHA_224
        !            44: #define SHA_256
        !            45: #ifdef SHA_64BIT
        !            46: #  define SHA_384
        !            47: #  define SHA_512
        !            48: #  define NEED_UINT_64T
        !            49: #endif
        !            50: 
        !            51: #ifndef EXIT_SUCCESS
        !            52: #define EXIT_SUCCESS    0
        !            53: #define EXIT_FAILURE    1
        !            54: #endif
        !            55: 
        !            56: #define li_64(h) 0x##h##ull
        !            57: 
        !            58: #define VOID_RETURN    void
        !            59: #define INT_RETURN     int
        !            60: 
        !            61: #if defined(__cplusplus)
        !            62: extern "C"
        !            63: {
        !            64: #endif
        !            65: 
        !            66: /* Note that the following function prototypes are the same */
        !            67: /* for both the bit and byte oriented implementations.  But */
        !            68: /* the length fields are in bytes or bits as is appropriate */
        !            69: /* for the version used.  Bit sequences are arrays of bytes */
        !            70: /* in which bit sequence indexes increase from the most to  */
        !            71: /* the least significant end of each byte                   */
        !            72: 
        !            73: #define SHA224_DIGEST_SIZE  28
        !            74: #define SHA224_BLOCK_SIZE   64
        !            75: #define SHA256_DIGEST_SIZE  32
        !            76: #define SHA256_BLOCK_SIZE   64
        !            77: 
        !            78: /* type to hold the SHA256 (and SHA224) context */
        !            79: 
        !            80: typedef struct
        !            81: {   uint_32t count[2];
        !            82:     uint_32t hash[8];
        !            83:     uint_32t wbuf[16];
        !            84: } sha256_ctx;
        !            85: 
        !            86: typedef sha256_ctx  sha224_ctx;
        !            87: 
        !            88: VOID_RETURN sha256_compile(sha256_ctx ctx[1]);
        !            89: 
        !            90: VOID_RETURN sha224_begin(sha224_ctx ctx[1]);
        !            91: #define sha224_hash sha256_hash
        !            92: VOID_RETURN sha224_end(unsigned char hval[], sha224_ctx ctx[1]);
        !            93: VOID_RETURN sha224(unsigned char hval[], const unsigned char data[], unsigned long len);
        !            94: 
        !            95: VOID_RETURN sha256_begin(sha256_ctx ctx[1]);
        !            96: VOID_RETURN sha256_hash(const unsigned char data[], unsigned long len, sha256_ctx ctx[1]);
        !            97: VOID_RETURN sha256_end(unsigned char hval[], sha256_ctx ctx[1]);
        !            98: VOID_RETURN sha256(unsigned char hval[], const unsigned char data[], unsigned long len);
        !            99: 
        !           100: #ifndef SHA_64BIT
        !           101: 
        !           102: typedef struct
        !           103: {   union
        !           104:     { sha256_ctx  ctx256[1];
        !           105:     } uu[1];
        !           106:     uint_32t    sha2_len;
        !           107: } sha2_ctx;
        !           108: 
        !           109: #define SHA2_MAX_DIGEST_SIZE    SHA256_DIGEST_SIZE
        !           110: 
        !           111: #else
        !           112: 
        !           113: #define SHA384_DIGEST_SIZE  48
        !           114: #define SHA384_BLOCK_SIZE  128
        !           115: #define SHA512_DIGEST_SIZE  64
        !           116: #define SHA512_BLOCK_SIZE  128
        !           117: #define SHA2_MAX_DIGEST_SIZE    SHA512_DIGEST_SIZE
        !           118: 
        !           119: /* type to hold the SHA384 (and SHA512) context */
        !           120: 
        !           121: typedef struct
        !           122: {   uint_64t count[2];
        !           123:     uint_64t hash[8];
        !           124:     uint_64t wbuf[16];
        !           125: } sha512_ctx;
        !           126: 
        !           127: typedef sha512_ctx  sha384_ctx;
        !           128: 
        !           129: typedef struct
        !           130: {   union
        !           131:     { sha256_ctx  ctx256[1];
        !           132:       sha512_ctx  ctx512[1];
        !           133:     } uu[1];
        !           134:     uint_32t    sha2_len;
        !           135: } sha2_ctx;
        !           136: 
        !           137: VOID_RETURN sha512_compile(sha512_ctx ctx[1]);
        !           138: 
        !           139: VOID_RETURN sha384_begin(sha384_ctx ctx[1]);
        !           140: #define sha384_hash sha512_hash
        !           141: VOID_RETURN sha384_end(unsigned char hval[], sha384_ctx ctx[1]);
        !           142: VOID_RETURN sha384(unsigned char hval[], const unsigned char data[], unsigned long len);
        !           143: 
        !           144: VOID_RETURN sha512_begin(sha512_ctx ctx[1]);
        !           145: VOID_RETURN sha512_hash(const unsigned char data[], unsigned long len, sha512_ctx ctx[1]);
        !           146: VOID_RETURN sha512_end(unsigned char hval[], sha512_ctx ctx[1]);
        !           147: VOID_RETURN sha512(unsigned char hval[], const unsigned char data[], unsigned long len);
        !           148: 
        !           149: INT_RETURN  sha2_begin(unsigned long size, sha2_ctx ctx[1]);
        !           150: VOID_RETURN sha2_hash(const unsigned char data[], unsigned long len, sha2_ctx ctx[1]);
        !           151: VOID_RETURN sha2_end(unsigned char hval[], sha2_ctx ctx[1]);
        !           152: INT_RETURN  sha2(unsigned char hval[], unsigned long size, const unsigned char data[], unsigned long len);
        !           153: 
        !           154: #endif
        !           155: 
        !           156: #if defined(__cplusplus)
        !           157: }
        !           158: #endif
        !           159: 
        !           160: #endif

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