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Diffstat (limited to 'trunk/src/sha.h')
-rw-r--r-- | trunk/src/sha.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/trunk/src/sha.h b/trunk/src/sha.h new file mode 100644 index 0000000..13583e3 --- /dev/null +++ b/trunk/src/sha.h @@ -0,0 +1,69 @@ +/* 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 "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 (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 (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 + 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 (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 (const struct sha_ctx *ctx, void *resbuf); + + +/* 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 (const char *buffer, size_t len, void *resblock); + +#endif |