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Diffstat (limited to 'src/sha256.h')
-rw-r--r-- | src/sha256.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/sha256.h b/src/sha256.h new file mode 100644 index 0000000..44060a7 --- /dev/null +++ b/src/sha256.h | |||
@@ -0,0 +1,91 @@ | |||
1 | /* Declarations of functions and data types used for SHA256 and SHA224 sum | ||
2 | library functions. | ||
3 | Copyright (C) 2005-2006, 2008-2013 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 ECLAT_SHA256_H | ||
19 | # define ECLAT_SHA256_H 1 | ||
20 | |||
21 | # include <stdio.h> | ||
22 | # include <stdint.h> | ||
23 | |||
24 | # ifdef __cplusplus | ||
25 | extern "C" { | ||
26 | # endif | ||
27 | |||
28 | /* Structure to save state of computation between the single steps. */ | ||
29 | struct sha256_ctx | ||
30 | { | ||
31 | uint32_t state[8]; | ||
32 | |||
33 | uint32_t total[2]; | ||
34 | size_t buflen; | ||
35 | uint32_t buffer[32]; | ||
36 | }; | ||
37 | |||
38 | enum { SHA224_DIGEST_SIZE = 224 / 8 }; | ||
39 | enum { SHA256_DIGEST_SIZE = 256 / 8 }; | ||
40 | |||
41 | /* Initialize structure containing state of computation. */ | ||
42 | extern void sha256_init_ctx (struct sha256_ctx *ctx); | ||
43 | extern void sha224_init_ctx (struct sha256_ctx *ctx); | ||
44 | |||
45 | /* Starting with the result of former calls of this function (or the | ||
46 | initialization function update the context for the next LEN bytes | ||
47 | starting at BUFFER. | ||
48 | It is necessary that LEN is a multiple of 64!!! */ | ||
49 | extern void sha256_process_block (const void *buffer, size_t len, | ||
50 | struct sha256_ctx *ctx); | ||
51 | |||
52 | /* Starting with the result of former calls of this function (or the | ||
53 | initialization function update the context for the next LEN bytes | ||
54 | starting at BUFFER. | ||
55 | It is NOT required that LEN is a multiple of 64. */ | ||
56 | extern void sha256_process_bytes (const void *buffer, size_t len, | ||
57 | struct sha256_ctx *ctx); | ||
58 | |||
59 | /* Process the remaining bytes in the buffer and put result from CTX | ||
60 | in first 32 (28) bytes following RESBUF. The result is always in little | ||
61 | endian byte order, so that a byte-wise output yields to the wanted | ||
62 | ASCII representation of the message digest. */ | ||
63 | extern void *sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf); | ||
64 | extern void *sha224_finish_ctx (struct sha256_ctx *ctx, void *resbuf); | ||
65 | |||
66 | |||
67 | /* Put result from CTX in first 32 (28) bytes following RESBUF. The result is | ||
68 | always in little endian byte order, so that a byte-wise output yields | ||
69 | to the wanted ASCII representation of the message digest. */ | ||
70 | extern void *sha256_read_ctx (const struct sha256_ctx *ctx, void *resbuf); | ||
71 | extern void *sha224_read_ctx (const struct sha256_ctx *ctx, void *resbuf); | ||
72 | |||
73 | |||
74 | /* Compute SHA256 (SHA224) message digest for bytes read from STREAM. The | ||
75 | resulting message digest number will be written into the 32 (28) bytes | ||
76 | beginning at RESBLOCK. */ | ||
77 | extern int sha256_stream (FILE *stream, void *resblock); | ||
78 | extern int sha224_stream (FILE *stream, void *resblock); | ||
79 | |||
80 | /* Compute SHA256 (SHA224) message digest for LEN bytes beginning at BUFFER. The | ||
81 | result is always in little endian byte order, so that a byte-wise | ||
82 | output yields to the wanted ASCII representation of the message | ||
83 | digest. */ | ||
84 | extern void *sha256_buffer (const char *buffer, size_t len, void *resblock); | ||
85 | extern void *sha224_buffer (const char *buffer, size_t len, void *resblock); | ||
86 | |||
87 | # ifdef __cplusplus | ||
88 | } | ||
89 | # endif | ||
90 | |||
91 | #endif | ||