From 861993950366ab31ee45c75766115c04fe83fbb5 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Wed, 20 Sep 2000 08:06:06 +0000 Subject: [PATCH] *** empty log message *** --- lib/sha.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 lib/sha.h diff --git a/lib/sha.h b/lib/sha.h new file mode 100644 index 0000000..2ee17f2 --- /dev/null +++ b/lib/sha.h @@ -0,0 +1,75 @@ +/* sha.h - Declaration of functions and datatypes for SHA1 sum computing + library functions. + + Copyright (C) 1999, Scott G. Miller +*/ + +#ifndef _SHA_H +# define _SHA_H 1 + +# include +# include "md5.h" + +/* Structure to save state of computation between the single steps. */ +struct sha_ctx +{ + md5_uint32 A; + md5_uint32 B; + md5_uint32 C; + md5_uint32 D; + md5_uint32 E; + + md5_uint32 total[2]; + md5_uint32 buflen; + char buffer[128]; +}; + + +/* 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 sha_process_block __P ((const void *buffer, size_t len, + 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. + It is NOT required that LEN is a multiple of 64. */ +extern void sha_process_bytes __P((const void *buffer, size_t len, + struct sha_ctx *ctx)); + +/* Initialize structure containing state of computation. */ +extern void sha_init_ctx __P ((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 + 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 *sha_finish_ctx __P ((struct sha_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 *sha_read_ctx __P ((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 + beginning at RESBLOCK. */ +extern int sha_stream __P ((FILE *stream, void *resblock)); + +/* Compute MD5 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 *sha_buffer __P ((const char *buffer, size_t len, void *resblock)); + +#endif -- 2.7.4