diff options
author | Andrew Fyfe <andrew@neptune-one.net> | 2007-07-25 22:35:29 +0100 |
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committer | Dan McGee <dan@archlinux.org> | 2007-08-16 11:30:38 -0400 |
commit | ba67fdae63122b40d8fb4abf9c1c7695999f143d (patch) | |
tree | a9dd1ef2aa84e9e60d17efb31f6c6b91af09e746 /lib/libalpm/sha1.c | |
parent | ee977019e39fe33a508a60abe4a3ad7eff819b74 (diff) | |
download | pacman-ba67fdae63122b40d8fb4abf9c1c7695999f143d.tar.xz |
Remove support for SHA1 from pacman.
There's no need for a second hashing algorithm. MD5 serves the purpose
of verifying that a package file hasn't been corrupted during download.
Signed-off-by: Andrew Fyfe <andrew@neptune-one.net>
Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib/libalpm/sha1.c')
-rw-r--r-- | lib/libalpm/sha1.c | 431 |
1 files changed, 0 insertions, 431 deletions
diff --git a/lib/libalpm/sha1.c b/lib/libalpm/sha1.c deleted file mode 100644 index a164a893..00000000 --- a/lib/libalpm/sha1.c +++ /dev/null @@ -1,431 +0,0 @@ -/* sha.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 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 2, 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, write to the Free Software Foundation, - Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -/* Written by Scott G. Miller - Credits: - Robert Klep <robert@ilse.nl> -- Expansion function fix -*/ - -#include "config.h" - -#include <sys/types.h> -#include <stdlib.h> -#include <string.h> - -/* libalpm */ -#include "sha1.h" -#include "alpm.h" -#include "log.h" -#include "util.h" - -/* - Not-swap is a macro that does an endian swap on architectures that are - big-endian, as SHA needs some data in a little-endian format -*/ - -#ifdef WORDS_BIGENDIAN -# define NOTSWAP(n) (n) -# define SWAP(n) \ - (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) -#else -# define NOTSWAP(n) \ - (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) -# define SWAP(n) (n) -#endif - -#define BLOCKSIZE 4096 -/* Ensure that BLOCKSIZE is a multiple of 64. */ -#if BLOCKSIZE % 64 != 0 -/* FIXME-someday (soon?): use #error instead of this kludge. */ -"invalid BLOCKSIZE" -#endif - -/* 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, ... */ }; - - -/* 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!!! */ -static 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. */ -static void sha_process_bytes (const void *buffer, size_t len, - struct sha_ctx *ctx); - -/* Put result from CTX in first 20 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. */ -static void *sha_read_ctx (const struct sha_ctx *ctx, void *resbuf); - -/* - Takes a pointer to a 160 bit block of data (five 32 bit ints) and - intializes it to the start constants of the SHA1 algorithm. This - must be called before using hash in the call to sha_hash -*/ -static void -sha_init_ctx (struct sha_ctx *ctx) -{ - ctx->A = 0x67452301; - ctx->B = 0xefcdab89; - ctx->C = 0x98badcfe; - ctx->D = 0x10325476; - ctx->E = 0xc3d2e1f0; - - ctx->total[0] = ctx->total[1] = 0; - ctx->buflen = 0; -} - -/* Put result from CTX in first 20 bytes following RESBUF. The result - must be in little endian byte order. - - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ -static void * -sha_read_ctx (const struct sha_ctx *ctx, void *resbuf) -{ - ((sha_uint32 *) resbuf)[0] = NOTSWAP (ctx->A); - ((sha_uint32 *) resbuf)[1] = NOTSWAP (ctx->B); - ((sha_uint32 *) resbuf)[2] = NOTSWAP (ctx->C); - ((sha_uint32 *) resbuf)[3] = NOTSWAP (ctx->D); - ((sha_uint32 *) resbuf)[4] = NOTSWAP (ctx->E); - - return resbuf; -} - -/* 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. */ -static void * -sha_finish_ctx (struct sha_ctx *ctx, void *resbuf) -{ - /* Take yet unprocessed bytes into account. */ - sha_uint32 bytes = ctx->buflen; - size_t pad; - - /* Now count remaining bytes. */ - ctx->total[0] += bytes; - if (ctx->total[0] < bytes) - ++ctx->total[1]; - - 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. */ - *(sha_uint32 *) &ctx->buffer[bytes + pad + 4] = NOTSWAP (ctx->total[0] << 3); - *(sha_uint32 *) &ctx->buffer[bytes + pad] = NOTSWAP ((ctx->total[1] << 3) | - (ctx->total[0] >> 29)); - - /* Process last bytes. */ - sha_process_block (ctx->buffer, bytes + pad + 8, ctx); - - return sha_read_ctx (ctx, resbuf); -} - -static void -sha_process_bytes (const void *buffer, size_t len, struct sha_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) - { - sha_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) - { -#if !_STRING_ARCH_unaligned -/* To check alignment gcc has an appropriate operator. Other - compilers don't. */ -# if __GNUC__ >= 2 -# define UNALIGNED_P(p) (((sha_uintptr) p) % __alignof__ (sha_uint32) != 0) -# else -# define UNALIGNED_P(p) (((sha_uintptr) p) % sizeof (sha_uint32) != 0) -# endif - if (UNALIGNED_P (buffer)) - while (len > 64) - { - sha_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx); - buffer = (const char *) buffer + 64; - len -= 64; - } - else -#endif - { - sha_process_block (buffer, len & ~63, ctx); - buffer = (const char *) buffer + (len & ~63); - len &= 63; - } - } - - /* Move remaining bytes in 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) - { - sha_process_block (ctx->buffer, 64, ctx); - left_over -= 64; - memcpy (ctx->buffer, &ctx->buffer[64], left_over); - } - ctx->buflen = left_over; - } -} - -/* --- Code below is the primary difference between md5.c and sha.c --- */ - -/* SHA1 round constants */ -#define K1 0x5a827999L -#define K2 0x6ed9eba1L -#define K3 0x8f1bbcdcL -#define K4 0xca62c1d6L - -/* Round functions. Note that F2 is the same as F4. */ -#define F1(B,C,D) ( D ^ ( B & ( C ^ D ) ) ) -#define F2(B,C,D) (B ^ C ^ D) -#define F3(B,C,D) ( ( B & C ) | ( D & ( B | C ) ) ) -#define F4(B,C,D) (B ^ C ^ D) - -/* Process LEN bytes of BUFFER, accumulating context into CTX. - It is assumed that LEN % 64 == 0. - Most of this code comes from GnuPG's cipher/sha1.c. */ - -static void -sha_process_block (const void *buffer, size_t len, struct sha_ctx *ctx) -{ - const sha_uint32 *words = buffer; - size_t nwords = len / sizeof (sha_uint32); - const sha_uint32 *endp = words + nwords; - sha_uint32 x[16]; - sha_uint32 a = ctx->A; - sha_uint32 b = ctx->B; - sha_uint32 c = ctx->C; - sha_uint32 d = ctx->D; - sha_uint32 e = ctx->E; - - /* First increment the byte count. RFC 1321 specifies the possible - length of the file up to 2^64 bits. Here we only compute the - number of bytes. Do a double word increment. */ - ctx->total[0] += len; - if (ctx->total[0] < len) - ++ctx->total[1]; - -#define M(I) ( tm = x[I&0x0f] ^ x[(I-14)&0x0f] \ - ^ x[(I-8)&0x0f] ^ x[(I-3)&0x0f] \ - , (x[I&0x0f] = rol(tm, 1)) ) - -#define R(A,B,C,D,E,F,K,M) do { E += rol( A, 5 ) \ - + F( B, C, D ) \ - + K \ - + M; \ - B = rol( B, 30 ); \ - } while(0) - - while (words < endp) - { - sha_uint32 tm; - int t; - /* FIXME: see sha1.c for a better implementation. */ - for (t = 0; t < 16; t++) - { - x[t] = NOTSWAP (*words); - words++; - } - - R( a, b, c, d, e, F1, K1, x[ 0] ); - R( e, a, b, c, d, F1, K1, x[ 1] ); - R( d, e, a, b, c, F1, K1, x[ 2] ); - R( c, d, e, a, b, F1, K1, x[ 3] ); - R( b, c, d, e, a, F1, K1, x[ 4] ); - R( a, b, c, d, e, F1, K1, x[ 5] ); - R( e, a, b, c, d, F1, K1, x[ 6] ); - R( d, e, a, b, c, F1, K1, x[ 7] ); - R( c, d, e, a, b, F1, K1, x[ 8] ); - R( b, c, d, e, a, F1, K1, x[ 9] ); - R( a, b, c, d, e, F1, K1, x[10] ); - R( e, a, b, c, d, F1, K1, x[11] ); - R( d, e, a, b, c, F1, K1, x[12] ); - R( c, d, e, a, b, F1, K1, x[13] ); - R( b, c, d, e, a, F1, K1, x[14] ); - R( a, b, c, d, e, F1, K1, x[15] ); - R( e, a, b, c, d, F1, K1, M(16) ); - R( d, e, a, b, c, F1, K1, M(17) ); - R( c, d, e, a, b, F1, K1, M(18) ); - R( b, c, d, e, a, F1, K1, M(19) ); - R( a, b, c, d, e, F2, K2, M(20) ); - R( e, a, b, c, d, F2, K2, M(21) ); - R( d, e, a, b, c, F2, K2, M(22) ); - R( c, d, e, a, b, F2, K2, M(23) ); - R( b, c, d, e, a, F2, K2, M(24) ); - R( a, b, c, d, e, F2, K2, M(25) ); - R( e, a, b, c, d, F2, K2, M(26) ); - R( d, e, a, b, c, F2, K2, M(27) ); - R( c, d, e, a, b, F2, K2, M(28) ); - R( b, c, d, e, a, F2, K2, M(29) ); - R( a, b, c, d, e, F2, K2, M(30) ); - R( e, a, b, c, d, F2, K2, M(31) ); - R( d, e, a, b, c, F2, K2, M(32) ); - R( c, d, e, a, b, F2, K2, M(33) ); - R( b, c, d, e, a, F2, K2, M(34) ); - R( a, b, c, d, e, F2, K2, M(35) ); - R( e, a, b, c, d, F2, K2, M(36) ); - R( d, e, a, b, c, F2, K2, M(37) ); - R( c, d, e, a, b, F2, K2, M(38) ); - R( b, c, d, e, a, F2, K2, M(39) ); - R( a, b, c, d, e, F3, K3, M(40) ); - R( e, a, b, c, d, F3, K3, M(41) ); - R( d, e, a, b, c, F3, K3, M(42) ); - R( c, d, e, a, b, F3, K3, M(43) ); - R( b, c, d, e, a, F3, K3, M(44) ); - R( a, b, c, d, e, F3, K3, M(45) ); - R( e, a, b, c, d, F3, K3, M(46) ); - R( d, e, a, b, c, F3, K3, M(47) ); - R( c, d, e, a, b, F3, K3, M(48) ); - R( b, c, d, e, a, F3, K3, M(49) ); - R( a, b, c, d, e, F3, K3, M(50) ); - R( e, a, b, c, d, F3, K3, M(51) ); - R( d, e, a, b, c, F3, K3, M(52) ); - R( c, d, e, a, b, F3, K3, M(53) ); - R( b, c, d, e, a, F3, K3, M(54) ); - R( a, b, c, d, e, F3, K3, M(55) ); - R( e, a, b, c, d, F3, K3, M(56) ); - R( d, e, a, b, c, F3, K3, M(57) ); - R( c, d, e, a, b, F3, K3, M(58) ); - R( b, c, d, e, a, F3, K3, M(59) ); - R( a, b, c, d, e, F4, K4, M(60) ); - R( e, a, b, c, d, F4, K4, M(61) ); - R( d, e, a, b, c, F4, K4, M(62) ); - R( c, d, e, a, b, F4, K4, M(63) ); - R( b, c, d, e, a, F4, K4, M(64) ); - R( a, b, c, d, e, F4, K4, M(65) ); - R( e, a, b, c, d, F4, K4, M(66) ); - R( d, e, a, b, c, F4, K4, M(67) ); - R( c, d, e, a, b, F4, K4, M(68) ); - R( b, c, d, e, a, F4, K4, M(69) ); - R( a, b, c, d, e, F4, K4, M(70) ); - R( e, a, b, c, d, F4, K4, M(71) ); - R( d, e, a, b, c, F4, K4, M(72) ); - R( c, d, e, a, b, F4, K4, M(73) ); - R( b, c, d, e, a, F4, K4, M(74) ); - R( a, b, c, d, e, F4, K4, M(75) ); - R( e, a, b, c, d, F4, K4, M(76) ); - R( d, e, a, b, c, F4, K4, M(77) ); - R( c, d, e, a, b, F4, K4, M(78) ); - R( b, c, d, e, a, F4, K4, M(79) ); - - a = ctx->A += a; - b = ctx->B += b; - c = ctx->C += c; - d = ctx->D += d; - e = ctx->E += e; - } -} - -/* Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All -rights reserved. - -RSA Data Security, Inc. makes no representations concerning either -the merchantability of this software or the suitability of this -software for any particular purpose. It is provided "as is" -without express or implied warranty of any kind. - -These notices must be retained in any copies of any part of this -documentation and/or software. - */ - -/** Get the sha1 sum of file. - * @param name name of the file - * @return the checksum on success, NULL on error - * @addtogroup alpm_misc - */ -char SYMEXPORT *alpm_get_sha1sum(char *name) -{ - ALPM_LOG_FUNC; - - ASSERT(name != NULL, return(NULL)); - - return(_alpm_SHAFile(name)); -} - -char* _alpm_SHAFile(char *filename) { - FILE *file; - struct sha_ctx context; - int len, i; - char hex[3]; - unsigned char buffer[1024], digest[20]; - char *ret; - - ALPM_LOG_FUNC; - - if((file = fopen(filename, "rb")) == NULL) { - _alpm_log(PM_LOG_ERROR, _("sha1: %s can't be opened\n"), filename); - } else { - sha_init_ctx(&context); - while((len = fread(buffer, 1, 1024, file))) { - sha_process_bytes(buffer, len, &context); - } - sha_finish_ctx(&context, digest); - fclose(file); - - ret = (char*)malloc(41); - ret[0] = '\0'; - for(i = 0; i < 20; i++) { - snprintf(hex, 3, "%02x", digest[i]); - strncat(ret, hex, 2); - } - _alpm_log(PM_LOG_DEBUG, "sha1(%s) = %s", filename, ret); - return(ret); - } - - return(NULL); -} - -/* vim: set ts=2 sw=2 noet: */ |