diff options
Diffstat (limited to 'sha1dc/sha1.c')
| -rw-r--r-- | sha1dc/sha1.c | 91 |
1 files changed, 60 insertions, 31 deletions
diff --git a/sha1dc/sha1.c b/sha1dc/sha1.c index 35e9dd5bf4..3dff80ac72 100644 --- a/sha1dc/sha1.c +++ b/sha1dc/sha1.c @@ -5,9 +5,23 @@ * https://opensource.org/licenses/MIT ***/ -#include "cache.h" -#include "sha1dc/sha1.h" -#include "sha1dc/ubc_check.h" +#ifndef SHA1DC_NO_STANDARD_INCLUDES +#include <string.h> +#include <memory.h> +#include <stdio.h> +#include <stdlib.h> +#endif + +#ifdef SHA1DC_CUSTOM_INCLUDE_SHA1_C +#include SHA1DC_CUSTOM_INCLUDE_SHA1_C +#endif + +#ifndef SHA1DC_INIT_SAFE_HASH_DEFAULT +#define SHA1DC_INIT_SAFE_HASH_DEFAULT 1 +#endif + +#include "sha1.h" +#include "ubc_check.h" /* @@ -18,16 +32,31 @@ If you are compiling on a big endian platform and your compiler does not define one of these, you will have to add whatever macros your tool chain defines to indicate Big-Endianness. */ -#if (defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)) || \ +#ifdef SHA1DC_BIGENDIAN +#undef SHA1DC_BIGENDIAN +#endif +#if (!defined SHA1DC_FORCE_LITTLEENDIAN) && \ + ((defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)) || \ (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __BIG_ENDIAN__)) || \ - defined(__BIG_ENDIAN__) || defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \ - defined(_MIPSEB) || defined(__MIPSEB) || defined(__MIPSEB__) + defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__) || defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \ + defined(_MIPSEB) || defined(__MIPSEB) || defined(__MIPSEB__) || defined(SHA1DC_FORCE_BIGENDIAN)) + +#define SHA1DC_BIGENDIAN -#define SHA1DC_BIGENDIAN 1 -#else -#undef SHA1DC_BIGENDIAN #endif /*ENDIANNESS SELECTION*/ +#if (defined SHA1DC_FORCE_UNALIGNED_ACCESS || \ + defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || \ + defined(i386) || defined(__i386) || defined(__i386__) || defined(__i486__) || \ + defined(__i586__) || defined(__i686__) || defined(_M_IX86) || defined(__X86__) || \ + defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) || defined(__INTEL__) || \ + defined(__386) || defined(_M_X64) || defined(_M_AMD64)) + +#define SHA1DC_ALLOW_UNALIGNED_ACCESS + +#endif /*UNALIGNMENT DETECTION*/ + + #define rotate_right(x,n) (((x)>>(n))|((x)<<(32-(n)))) #define rotate_left(x,n) (((x)<<(n))|((x)>>(32-(n)))) @@ -36,11 +65,11 @@ #define sha1_mix(W, t) (rotate_left(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1)) -#if defined(SHA1DC_BIGENDIAN) +#ifdef SHA1DC_BIGENDIAN #define sha1_load(m, t, temp) { temp = m[t]; } #else #define sha1_load(m, t, temp) { temp = m[t]; sha1_bswap32(temp); } -#endif /* !defined(SHA1DC_BIGENDIAN) */ +#endif #define sha1_store(W, t, x) *(volatile uint32_t *)&W[t] = x @@ -869,6 +898,11 @@ static void sha1recompress_fast_ ## t (uint32_t ihvin[5], uint32_t ihvout[5], co ihvout[0] = ihvin[0] + a; ihvout[1] = ihvin[1] + b; ihvout[2] = ihvin[2] + c; ihvout[3] = ihvin[3] + d; ihvout[4] = ihvin[4] + e; \ } +#ifdef _MSC_VER +#pragma warning(push) +#pragma warning(disable: 4127) /* Complier complains about the checks in the above macro being constant. */ +#endif + #ifdef DOSTORESTATE0 SHA1_RECOMPRESS(0) #endif @@ -1189,6 +1223,10 @@ SHA1_RECOMPRESS(78) SHA1_RECOMPRESS(79) #endif +#ifdef _MSC_VER +#pragma warning(pop) +#endif + static void sha1_recompression_step(uint32_t step, uint32_t ihvin[5], uint32_t ihvout[5], const uint32_t me2[80], const uint32_t state[5]) { switch (step) @@ -1662,7 +1700,7 @@ void SHA1DCInit(SHA1_CTX* ctx) ctx->ihv[3] = 0x10325476; ctx->ihv[4] = 0xC3D2E1F0; ctx->found_collision = 0; - ctx->safe_hash = 0; + ctx->safe_hash = SHA1DC_INIT_SAFE_HASH_DEFAULT; ctx->ubc_check = 1; ctx->detect_coll = 1; ctx->reduced_round_coll = 0; @@ -1710,6 +1748,7 @@ void SHA1DCSetCallback(SHA1_CTX* ctx, collision_block_callback callback) void SHA1DCUpdate(SHA1_CTX* ctx, const char* buf, size_t len) { unsigned left, fill; + if (len == 0) return; @@ -1728,7 +1767,13 @@ void SHA1DCUpdate(SHA1_CTX* ctx, const char* buf, size_t len) while (len >= 64) { ctx->total += 64; + +#if defined(SHA1DC_ALLOW_UNALIGNED_ACCESS) sha1_process(ctx, (uint32_t*)(buf)); +#else + memcpy(ctx->buffer, buf, 64); + sha1_process(ctx, (uint32_t*)(ctx->buffer)); +#endif /* defined(SHA1DC_ALLOW_UNALIGNED_ACCESS) */ buf += 64; len -= 64; } @@ -1788,22 +1833,6 @@ int SHA1DCFinal(unsigned char output[20], SHA1_CTX *ctx) return ctx->found_collision; } -void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx) -{ - if (!SHA1DCFinal(hash, ctx)) - return; - die("SHA-1 appears to be part of a collision attack: %s", - sha1_to_hex(hash)); -} - -void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len) -{ - const char *data = vdata; - /* We expect an unsigned long, but sha1dc only takes an int */ - while (len > INT_MAX) { - SHA1DCUpdate(ctx, data, INT_MAX); - data += INT_MAX; - len -= INT_MAX; - } - SHA1DCUpdate(ctx, data, len); -} +#ifdef SHA1DC_CUSTOM_TRAILING_INCLUDE_SHA1_C +#include SHA1DC_CUSTOM_TRAILING_INCLUDE_SHA1_C +#endif |