| /* Declarations of functions and data types used for SHA512 and SHA384 sum |
| library functions. |
| Copyright (C) 2005-2006, 2008-2020 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 <https://www.gnu.org/licenses/>. */ |
| |
| #ifndef SHA512_H |
| # define SHA512_H 1 |
| |
| # include <stdio.h> |
| # include "u64.h" |
| |
| # if HAVE_OPENSSL_SHA512 |
| # include <openssl/sha.h> |
| # endif |
| |
| # ifdef __cplusplus |
| extern "C" { |
| # endif |
| |
| enum { SHA384_DIGEST_SIZE = 384 / 8 }; |
| enum { SHA512_DIGEST_SIZE = 512 / 8 }; |
| |
| # if HAVE_OPENSSL_SHA512 |
| # define GL_OPENSSL_NAME 384 |
| # include "gl_openssl.h" |
| # define GL_OPENSSL_NAME 512 |
| # include "gl_openssl.h" |
| # else |
| /* Structure to save state of computation between the single steps. */ |
| struct sha512_ctx |
| { |
| u64 state[8]; |
| |
| u64 total[2]; |
| size_t buflen; /* ≥ 0, ≤ 256 */ |
| u64 buffer[32]; /* 256 bytes; the first buflen bytes are in use */ |
| }; |
| |
| /* Initialize structure containing state of computation. */ |
| extern void sha512_init_ctx (struct sha512_ctx *ctx); |
| extern void sha384_init_ctx (struct sha512_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 128!!! */ |
| extern void sha512_process_block (const void *buffer, size_t len, |
| struct sha512_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 128. */ |
| extern void sha512_process_bytes (const void *buffer, size_t len, |
| struct sha512_ctx *ctx); |
| |
| /* Process the remaining bytes in the buffer and put result from CTX |
| in first 64 (48) 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 *sha512_finish_ctx (struct sha512_ctx *ctx, void *restrict resbuf); |
| extern void *sha384_finish_ctx (struct sha512_ctx *ctx, void *restrict resbuf); |
| |
| |
| /* Put result from CTX in first 64 (48) 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 *sha512_read_ctx (const struct sha512_ctx *ctx, |
| void *restrict resbuf); |
| extern void *sha384_read_ctx (const struct sha512_ctx *ctx, |
| void *restrict resbuf); |
| |
| |
| /* Compute SHA512 (SHA384) 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 *sha512_buffer (const char *buffer, size_t len, |
| void *restrict resblock); |
| extern void *sha384_buffer (const char *buffer, size_t len, |
| void *restrict resblock); |
| |
| # endif |
| /* Compute SHA512 (SHA384) message digest for bytes read from STREAM. |
| STREAM is an open file stream. Regular files are handled more efficiently. |
| The contents of STREAM from its current position to its end will be read. |
| The case that the last operation on STREAM was an 'ungetc' is not supported. |
| The resulting message digest number will be written into the 64 (48) bytes |
| beginning at RESBLOCK. */ |
| extern int sha512_stream (FILE *stream, void *resblock); |
| extern int sha384_stream (FILE *stream, void *resblock); |
| |
| |
| # ifdef __cplusplus |
| } |
| # endif |
| |
| #endif |
| |
| /* |
| * Hey Emacs! |
| * Local Variables: |
| * coding: utf-8 |
| * End: |
| */ |