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author | Simon Josefsson <simon@josefsson.org> | 2005-10-18 22:59:17 +0000 |
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committer | Simon Josefsson <simon@josefsson.org> | 2005-10-18 22:59:17 +0000 |
commit | 82c1692fcf6a698beaf2eaa6f5a4cbc3f378a3b9 (patch) | |
tree | a4bb34df559439eb2e4cb925a901fb9da3836c8e /lib/md4.h | |
parent | bc6749e154051f836717563d7740d532545621e8 (diff) | |
download | gnulib-82c1692fcf6a698beaf2eaa6f5a4cbc3f378a3b9.tar.gz |
Add md4 module.
Diffstat (limited to 'lib/md4.h')
-rw-r--r-- | lib/md4.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/lib/md4.h b/lib/md4.h new file mode 100644 index 0000000000..24dec79e2f --- /dev/null +++ b/lib/md4.h @@ -0,0 +1,88 @@ +/* Declarations of functions and data types used for MD4 sum + library functions. + Copyright (C) 2000, 2001, 2003, 2005 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 2, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#ifndef MD4_H +# define MD4_H 1 + +# include <stdio.h> +# include <stdint.h> + +#define MD4_DIGEST_SIZE 16 + +/* Structure to save state of computation between the single steps. */ +struct md4_ctx +{ + uint32_t A; + uint32_t B; + uint32_t C; + uint32_t D; + + uint32_t total[2]; + uint32_t buflen; + char buffer[128] __attribute__ ((__aligned__ (__alignof__ (uint32_t)))); +}; + + +/* Initialize structure containing state of computation. */ +extern void md4_init_ctx (struct md4_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 md4_process_block (const void *buffer, size_t len, + struct md4_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 md4_process_bytes (const void *buffer, size_t len, + struct md4_ctx *ctx); + +/* Process the remaining bytes in the buffer and put result from CTX + in first 16 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. + + IMPORTANT: On some systems it is required that RESBUF be correctly + aligned for a 32 bits value. */ +extern void *md4_finish_ctx (struct md4_ctx *ctx, void *resbuf); + + +/* Put result from CTX in first 16 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. + + IMPORTANT: On some systems it is required that RESBUF is correctly + aligned for a 32 bits value. */ +extern void *md4_read_ctx (const struct md4_ctx *ctx, void *resbuf); + + +/* Compute MD4 message digest for bytes read from STREAM. The + resulting message digest number will be written into the 16 bytes + beginning at RESBLOCK. */ +extern int md4_stream (FILE * stream, void *resblock); + +/* Compute MD4 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 *md4_buffer (const char *buffer, size_t len, void *resblock); + +#endif |