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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 |