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Diffstat (limited to 'crypt/sha256.c')
| -rw-r--r-- | crypt/sha256.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/crypt/sha256.c b/crypt/sha256.c deleted file mode 100644 index 96153d6..0000000 --- a/crypt/sha256.c +++ /dev/null @@ -1,193 +0,0 @@ -/* Functions to compute SHA256 message digest of files or memory blocks. - according to the definition of SHA256 in FIPS 180-2. - Copyright (C) 2007-2023 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library 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. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include <endian.h> -#include <stdlib.h> -#include <string.h> -#include <stdint.h> -#include <sys/types.h> - -#include "sha256.h" - -#if __BYTE_ORDER == __LITTLE_ENDIAN -# ifdef _LIBC -# include <byteswap.h> -# define SWAP(n) bswap_32 (n) -# define SWAP64(n) bswap_64 (n) -# else -# define SWAP(n) \ - (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) -# define SWAP64(n) \ - (((n) << 56) \ - | (((n) & 0xff00) << 40) \ - | (((n) & 0xff0000) << 24) \ - | (((n) & 0xff000000) << 8) \ - | (((n) >> 8) & 0xff000000) \ - | (((n) >> 24) & 0xff0000) \ - | (((n) >> 40) & 0xff00) \ - | ((n) >> 56)) -# endif -#else -# define SWAP(n) (n) -# define SWAP64(n) (n) -#endif - - -/* This array contains the bytes used to pad the buffer to the next - 64-byte boundary. (FIPS 180-2:5.1.1) */ -static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ }; - - -/* Constants for SHA256 from FIPS 180-2:4.2.2. */ -static const uint32_t K[64] = - { - 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, - 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, - 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, - 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, - 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, - 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, - 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, - 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, - 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, - 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, - 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, - 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, - 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, - 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, - 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, - 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 - }; - -void __sha256_process_block (const void *, size_t, struct sha256_ctx *); - -/* Initialize structure containing state of computation. - (FIPS 180-2:5.3.2) */ -void -__sha256_init_ctx (struct sha256_ctx *ctx) -{ - ctx->H[0] = 0x6a09e667; - ctx->H[1] = 0xbb67ae85; - ctx->H[2] = 0x3c6ef372; - ctx->H[3] = 0xa54ff53a; - ctx->H[4] = 0x510e527f; - ctx->H[5] = 0x9b05688c; - ctx->H[6] = 0x1f83d9ab; - ctx->H[7] = 0x5be0cd19; - - ctx->total64 = 0; - ctx->buflen = 0; -} - - -/* Process the remaining bytes in the internal buffer and the usual - prolog according to the standard and write the result to RESBUF. - - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ -void * -__sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf) -{ - /* Take yet unprocessed bytes into account. */ - uint32_t bytes = ctx->buflen; - size_t pad; - - /* Now count remaining bytes. */ - ctx->total64 += bytes; - - pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes; - memcpy (&ctx->buffer[bytes], fillbuf, pad); - - /* Put the 64-bit file length in *bits* at the end of the buffer. */ - ctx->buffer32[(bytes + pad + 4) / 4] = SWAP (ctx->total[TOTAL64_low] << 3); - ctx->buffer32[(bytes + pad) / 4] = SWAP ((ctx->total[TOTAL64_high] << 3) - | (ctx->total[TOTAL64_low] >> 29)); - - /* Process last bytes. */ - __sha256_process_block (ctx->buffer, bytes + pad + 8, ctx); - - /* Put result from CTX in first 32 bytes following RESBUF. */ - for (unsigned int i = 0; i < 8; ++i) - ((uint32_t *) resbuf)[i] = SWAP (ctx->H[i]); - - return resbuf; -} - - -void -__sha256_process_bytes (const void *buffer, size_t len, struct sha256_ctx *ctx) -{ - /* When we already have some bits in our internal buffer concatenate - both inputs first. */ - if (ctx->buflen != 0) - { - size_t left_over = ctx->buflen; - size_t add = 128 - left_over > len ? len : 128 - left_over; - - memcpy (&ctx->buffer[left_over], buffer, add); - ctx->buflen += add; - - if (ctx->buflen > 64) - { - __sha256_process_block (ctx->buffer, ctx->buflen & ~63, ctx); - - ctx->buflen &= 63; - /* The regions in the following copy operation cannot overlap. */ - memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~63], - ctx->buflen); - } - - buffer = (const char *) buffer + add; - len -= add; - } - - /* Process available complete blocks. */ - if (len >= 64) - { - while (len > 64) - { - __sha256_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx); - buffer = (const char *) buffer + 64; - len -= 64; - } - } - - /* Move remaining bytes into internal buffer. */ - if (len > 0) - { - size_t left_over = ctx->buflen; - - memcpy (&ctx->buffer[left_over], buffer, len); - left_over += len; - if (left_over >= 64) - { - __sha256_process_block (ctx->buffer, 64, ctx); - left_over -= 64; - memcpy (ctx->buffer, &ctx->buffer[64], left_over); - } - ctx->buflen = left_over; - } -} - -#include <sha256-block.c> |