diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sha.h | 36 |
1 files changed, 24 insertions, 12 deletions
@@ -1,8 +1,20 @@ -/* sha.h - Declaration of functions and datatypes for SHA1 sum computing +/* Declarations of functions and data types used for SHA1 sum library functions. + Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc. - Copyright (C) 1999, Scott G. Miller -*/ + 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _SHA_H # define _SHA_H 1 @@ -25,6 +37,9 @@ struct sha_ctx }; +/* Initialize structure containing state of computation. */ +extern void sha_init_ctx (struct sha_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. @@ -39,20 +54,17 @@ extern void sha_process_block (const void *buffer, size_t len, extern void sha_process_bytes (const void *buffer, size_t len, struct sha_ctx *ctx); -/* Initialize structure containing state of computation. */ -extern void sha_init_ctx (struct sha_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 + in first 20 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 + IMPORTANT: On some systems it is required that RESBUF be correctly aligned for a 32 bits value. */ extern void *sha_finish_ctx (struct sha_ctx *ctx, void *resbuf); -/* Put result from CTX in first 16 bytes following RESBUF. The result is +/* Put result from CTX in first 20 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. @@ -61,12 +73,12 @@ extern void *sha_finish_ctx (struct sha_ctx *ctx, void *resbuf); extern void *sha_read_ctx (const struct sha_ctx *ctx, void *resbuf); -/* Compute MD5 message digest for bytes read from STREAM. The - resulting message digest number will be written into the 16 bytes +/* Compute SHA1 message digest for bytes read from STREAM. The + resulting message digest number will be written into the 20 bytes beginning at RESBLOCK. */ extern int sha_stream (FILE *stream, void *resblock); -/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The +/* Compute SHA1 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. */ |