diff options
author | ticktock35 <ticktock35@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358> | 2009-10-28 03:27:13 (EDT) |
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committer | ticktock35 <ticktock35@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358> | 2009-10-28 03:27:13 (EDT) |
commit | 84552e64fa6d42931a5c64c20acc580e9bb6b8bd (patch) | |
tree | 83468d4645b4390670403a9a5afb9b3a0387cfbb /libopkg/sha256.h | |
parent | 3c9460a62e86e92cac8695317efb6d56ecabfb71 (diff) |
Adding sha256.[ch]
Sorry forgot adding them.
Thanks for Graham Gower <graham.gower@gmail.com>
git-svn-id: http://opkg.googlecode.com/svn/trunk@223 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358
Diffstat (limited to 'libopkg/sha256.h')
-rw-r--r-- | libopkg/sha256.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/libopkg/sha256.h b/libopkg/sha256.h new file mode 100644 index 0000000..6a9aed4 --- /dev/null +++ b/libopkg/sha256.h @@ -0,0 +1,91 @@ +/* Declarations of functions and data types used for SHA256 and SHA224 sum + library functions. + Copyright (C) 2005, 2006, 2008, 2009 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#ifndef SHA256_H +# define SHA256_H 1 + +# include <stdio.h> +# include <stdint.h> + +# ifdef __cplusplus +extern "C" { +# endif + +/* Structure to save state of computation between the single steps. */ +struct sha256_ctx +{ + uint32_t state[8]; + + uint32_t total[2]; + size_t buflen; + uint32_t buffer[32]; +}; + +enum { SHA224_DIGEST_SIZE = 224 / 8 }; +enum { SHA256_DIGEST_SIZE = 256 / 8 }; + +/* Initialize structure containing state of computation. */ +extern void sha256_init_ctx (struct sha256_ctx *ctx); +extern void sha224_init_ctx (struct sha256_ctx *ctx); + +/* Starting with the result of former calls of this function (or the + initialization function update the context for the next LEN bytes + starting at BUFFER. + It is necessary that LEN is a multiple of 64!!! */ +extern void sha256_process_block (const void *buffer, size_t len, + struct sha256_ctx *ctx); + +/* Starting with the result of former calls of this function (or the + initialization function update the context for the next LEN bytes + starting at BUFFER. + It is NOT required that LEN is a multiple of 64. */ +extern void sha256_process_bytes (const void *buffer, size_t len, + struct sha256_ctx *ctx); + +/* Process the remaining bytes in the buffer and put result from CTX + in first 32 (28) bytes following RESBUF. The result is always in little + endian byte order, so that a byte-wise output yields to the wanted + ASCII representation of the message digest. */ +extern void *sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf); +extern void *sha224_finish_ctx (struct sha256_ctx *ctx, void *resbuf); + + +/* Put result from CTX in first 32 (28) bytes following RESBUF. The result is + always in little endian byte order, so that a byte-wise output yields + to the wanted ASCII representation of the message digest. */ +extern void *sha256_read_ctx (const struct sha256_ctx *ctx, void *resbuf); +extern void *sha224_read_ctx (const struct sha256_ctx *ctx, void *resbuf); + + +/* Compute SHA256 (SHA224) message digest for bytes read from STREAM. The + resulting message digest number will be written into the 32 (28) bytes + beginning at RESBLOCK. */ +extern int sha256_stream (FILE *stream, void *resblock); +extern int sha224_stream (FILE *stream, void *resblock); + +/* Compute SHA256 (SHA224) message digest for LEN bytes beginning at BUFFER. The + result is always in little endian byte order, so that a byte-wise + output yields to the wanted ASCII representation of the message + digest. */ +extern void *sha256_buffer (const char *buffer, size_t len, void *resblock); +extern void *sha224_buffer (const char *buffer, size_t len, void *resblock); + +# ifdef __cplusplus +} +# endif + +#endif |