| 1 | /* Declarations of functions and data types used for SHA512 and SHA384 sum |
| 2 | library functions. |
| 3 | Copyright (C) 2005, 2006, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #ifndef SHA512_H |
| 19 | # define SHA512_H 1 |
| 20 | |
| 21 | # include <stdio.h> |
| 22 | |
| 23 | # include "u64.h" |
| 24 | |
| 25 | # ifdef __cplusplus |
| 26 | extern "C" { |
| 27 | # endif |
| 28 | |
| 29 | /* Structure to save state of computation between the single steps. */ |
| 30 | struct sha512_ctx |
| 31 | { |
| 32 | u64 state[8]; |
| 33 | |
| 34 | u64 total[2]; |
| 35 | size_t buflen; |
| 36 | u64 buffer[32]; |
| 37 | }; |
| 38 | |
| 39 | enum { SHA384_DIGEST_SIZE = 384 / 8 }; |
| 40 | enum { SHA512_DIGEST_SIZE = 512 / 8 }; |
| 41 | |
| 42 | /* Initialize structure containing state of computation. */ |
| 43 | extern void sha512_init_ctx (struct sha512_ctx *ctx); |
| 44 | extern void sha384_init_ctx (struct sha512_ctx *ctx); |
| 45 | |
| 46 | /* Starting with the result of former calls of this function (or the |
| 47 | initialization function update the context for the next LEN bytes |
| 48 | starting at BUFFER. |
| 49 | It is necessary that LEN is a multiple of 128!!! */ |
| 50 | extern void sha512_process_block (const void *buffer, size_t len, |
| 51 | struct sha512_ctx *ctx); |
| 52 | |
| 53 | /* Starting with the result of former calls of this function (or the |
| 54 | initialization function update the context for the next LEN bytes |
| 55 | starting at BUFFER. |
| 56 | It is NOT required that LEN is a multiple of 128. */ |
| 57 | extern void sha512_process_bytes (const void *buffer, size_t len, |
| 58 | struct sha512_ctx *ctx); |
| 59 | |
| 60 | /* Process the remaining bytes in the buffer and put result from CTX |
| 61 | in first 64 (48) bytes following RESBUF. The result is always in little |
| 62 | endian byte order, so that a byte-wise output yields to the wanted |
| 63 | ASCII representation of the message digest. */ |
| 64 | extern void *sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf); |
| 65 | extern void *sha384_finish_ctx (struct sha512_ctx *ctx, void *resbuf); |
| 66 | |
| 67 | |
| 68 | /* Put result from CTX in first 64 (48) bytes following RESBUF. The result is |
| 69 | always in little endian byte order, so that a byte-wise output yields |
| 70 | to the wanted ASCII representation of the message digest. |
| 71 | |
| 72 | IMPORTANT: On some systems it is required that RESBUF is correctly |
| 73 | aligned for a 32 bits value. */ |
| 74 | extern void *sha512_read_ctx (const struct sha512_ctx *ctx, void *resbuf); |
| 75 | extern void *sha384_read_ctx (const struct sha512_ctx *ctx, void *resbuf); |
| 76 | |
| 77 | |
| 78 | /* Compute SHA512 (SHA384) message digest for bytes read from STREAM. The |
| 79 | resulting message digest number will be written into the 64 (48) bytes |
| 80 | beginning at RESBLOCK. */ |
| 81 | extern int sha512_stream (FILE *stream, void *resblock); |
| 82 | extern int sha384_stream (FILE *stream, void *resblock); |
| 83 | |
| 84 | /* Compute SHA512 (SHA384) message digest for LEN bytes beginning at BUFFER. The |
| 85 | result is always in little endian byte order, so that a byte-wise |
| 86 | output yields to the wanted ASCII representation of the message |
| 87 | digest. */ |
| 88 | extern void *sha512_buffer (const char *buffer, size_t len, void *resblock); |
| 89 | extern void *sha384_buffer (const char *buffer, size_t len, void *resblock); |
| 90 | |
| 91 | # ifdef __cplusplus |
| 92 | } |
| 93 | # endif |
| 94 | |
| 95 | #endif |