diff options
Diffstat (limited to 'lib/sha1.c')
| -rw-r--r-- | lib/sha1.c | 117 |
1 files changed, 21 insertions, 96 deletions
diff --git a/lib/sha1.c b/lib/sha1.c index ca3eabc45e7..79e50ba0b03 100644 --- a/lib/sha1.c +++ b/lib/sha1.c @@ -1,20 +1,20 @@ /* sha1.c - Functions to compute SHA1 message digest of files or memory blocks according to the NIST specification FIPS-180-1. - Copyright (C) 2000-2001, 2003-2006, 2008-2017 Free Software Foundation, Inc. + Copyright (C) 2000-2001, 2003-2006, 2008-2022 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, or (at your option) any - later version. + This file is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + This file 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. + GNU Lesser 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/>. */ + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Scott G. Miller Credits: @@ -23,6 +23,7 @@ #include <config.h> +/* Specification. */ #if HAVE_OPENSSL_SHA1 # define GL_OPENSSL_INLINE _GL_EXTERN_INLINE #endif @@ -30,26 +31,17 @@ #include <stdalign.h> #include <stdint.h> -#include <stdlib.h> #include <string.h> -#if USE_UNLOCKED_IO -# include "unlocked-io.h" -#endif - +#include <byteswap.h> #ifdef WORDS_BIGENDIAN # define SWAP(n) (n) #else -# define SWAP(n) \ - (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) -#endif - -#define BLOCKSIZE 32768 -#if BLOCKSIZE % 64 != 0 -# error "invalid BLOCKSIZE" +# define SWAP(n) bswap_32 (n) #endif #if ! HAVE_OPENSSL_SHA1 + /* This array contains the bytes used to pad the buffer to the next 64-byte boundary. (RFC 1321, 3.1: Step 1) */ static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ }; @@ -120,82 +112,7 @@ sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf) return sha1_read_ctx (ctx, resbuf); } -#endif - -/* Compute SHA1 message digest for bytes read from STREAM. The - resulting message digest number will be written into the 16 bytes - beginning at RESBLOCK. */ -int -sha1_stream (FILE *stream, void *resblock) -{ - struct sha1_ctx ctx; - size_t sum; - - char *buffer = malloc (BLOCKSIZE + 72); - if (!buffer) - return 1; - - /* Initialize the computation context. */ - sha1_init_ctx (&ctx); - - /* Iterate over full file contents. */ - while (1) - { - /* We read the file in blocks of BLOCKSIZE bytes. One call of the - computation function processes the whole buffer so that with the - next round of the loop another block can be read. */ - size_t n; - sum = 0; - - /* Read block. Take care for partial reads. */ - while (1) - { - n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream); - - sum += n; - - if (sum == BLOCKSIZE) - break; - - if (n == 0) - { - /* Check for the error flag IFF N == 0, so that we don't - exit the loop after a partial read due to e.g., EAGAIN - or EWOULDBLOCK. */ - if (ferror (stream)) - { - free (buffer); - return 1; - } - goto process_partial_block; - } - - /* We've read at least one byte, so ignore errors. But always - check for EOF, since feof may be true even though N > 0. - Otherwise, we could end up calling fread after EOF. */ - if (feof (stream)) - goto process_partial_block; - } - - /* Process buffer with BLOCKSIZE bytes. Note that - BLOCKSIZE % 64 == 0 - */ - sha1_process_block (buffer, BLOCKSIZE, &ctx); - } - - process_partial_block:; - - /* Process any remaining bytes. */ - if (sum > 0) - sha1_process_bytes (buffer, sum, &ctx); - - /* Construct result in desired memory. */ - sha1_finish_ctx (&ctx, resblock); - free (buffer); - return 0; -} -#if ! HAVE_OPENSSL_SHA1 /* 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 @@ -433,4 +350,12 @@ sha1_process_block (const void *buffer, size_t len, struct sha1_ctx *ctx) e = ctx->E += e; } } + #endif + +/* + * Hey Emacs! + * Local Variables: + * coding: utf-8 + * End: + */ |