0b2f9cbe7c
Previously we were using 504 and 1016 which still produces the correct result since padding is done in 8-bit bytes. However, using size-1 for the bitwise AND makes the intent clearer and likely would have prevented the previous bug in SHA512Pad. From Matthieu Barjole and Victor Cutillas of Synacktiv (https://synacktiv.com)
516 lines
14 KiB
C
516 lines
14 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2013-2015 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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/*
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* Implementation of SHA-224, SHA-256, SHA-384 and SHA-512
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* as per FIPS 180-4: Secure Hash Standard (SHS)
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* http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
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*
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* Derived from the public domain SHA-1 and SHA-2 implementations
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* by Steve Reid and Wei Dai respectively.
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*/
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#include <config.h>
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#include <string.h>
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#if defined(HAVE_STDINT_H)
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# include <stdint.h>
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#elif defined(HAVE_INTTYPES_H)
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# include <inttypes.h>
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#endif
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#if defined(HAVE_ENDIAN_H)
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# include <endian.h>
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#elif defined(HAVE_SYS_ENDIAN_H)
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# include <sys/endian.h>
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#elif defined(HAVE_MACHINE_ENDIAN_H)
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# include <machine/endian.h>
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#else
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# include "compat/endian.h"
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#endif
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#include "sudo_compat.h"
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#include "compat/sha2.h"
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/*
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* SHA-2 operates on 32-bit and 64-bit words in big endian byte order.
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* The following macros convert between character arrays and big endian words.
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*/
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#define BE8TO32(x, y) do { \
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(x) = (((uint32_t)((y)[0] & 255) << 24) | \
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((uint32_t)((y)[1] & 255) << 16) | \
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((uint32_t)((y)[2] & 255) << 8) | \
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((uint32_t)((y)[3] & 255))); \
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} while (0)
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#define BE8TO64(x, y) do { \
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(x) = (((uint64_t)((y)[0] & 255) << 56) | \
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((uint64_t)((y)[1] & 255) << 48) | \
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((uint64_t)((y)[2] & 255) << 40) | \
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((uint64_t)((y)[3] & 255) << 32) | \
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((uint64_t)((y)[4] & 255) << 24) | \
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((uint64_t)((y)[5] & 255) << 16) | \
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((uint64_t)((y)[6] & 255) << 8) | \
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((uint64_t)((y)[7] & 255))); \
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} while (0)
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#define BE32TO8(x, y) do { \
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(x)[0] = (uint8_t)(((y) >> 24) & 255); \
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(x)[1] = (uint8_t)(((y) >> 16) & 255); \
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(x)[2] = (uint8_t)(((y) >> 8) & 255); \
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(x)[3] = (uint8_t)((y) & 255); \
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} while (0)
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#define BE64TO8(x, y) do { \
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(x)[0] = (uint8_t)(((y) >> 56) & 255); \
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(x)[1] = (uint8_t)(((y) >> 48) & 255); \
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(x)[2] = (uint8_t)(((y) >> 40) & 255); \
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(x)[3] = (uint8_t)(((y) >> 32) & 255); \
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(x)[4] = (uint8_t)(((y) >> 24) & 255); \
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(x)[5] = (uint8_t)(((y) >> 16) & 255); \
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(x)[6] = (uint8_t)(((y) >> 8) & 255); \
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(x)[7] = (uint8_t)((y) & 255); \
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} while (0)
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#define rotrFixed(x,y) (y ? ((x>>y) | (x<<(sizeof(x)*8-y))) : x)
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#define blk0(i) (W[i])
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#define blk2(i) (W[i&15]+=s1(W[(i-2)&15])+W[(i-7)&15]+s0(W[(i-15)&15]))
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#define Ch(x,y,z) (z^(x&(y^z)))
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#define Maj(x,y,z) (y^((x^y)&(y^z)))
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#define a(i) T[(0-i)&7]
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#define b(i) T[(1-i)&7]
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#define c(i) T[(2-i)&7]
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#define d(i) T[(3-i)&7]
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#define e(i) T[(4-i)&7]
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#define f(i) T[(5-i)&7]
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#define g(i) T[(6-i)&7]
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#define h(i) T[(7-i)&7]
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void
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SHA224Init(SHA2_CTX *ctx)
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{
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memset(ctx, 0, sizeof(*ctx));
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ctx->state.st32[0] = 0xc1059ed8UL;
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ctx->state.st32[1] = 0x367cd507UL;
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ctx->state.st32[2] = 0x3070dd17UL;
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ctx->state.st32[3] = 0xf70e5939UL;
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ctx->state.st32[4] = 0xffc00b31UL;
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ctx->state.st32[5] = 0x68581511UL;
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ctx->state.st32[6] = 0x64f98fa7UL;
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ctx->state.st32[7] = 0xbefa4fa4UL;
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}
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void
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SHA224Transform(uint32_t state[8], const uint8_t buffer[SHA224_BLOCK_LENGTH])
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{
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SHA256Transform(state, buffer);
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}
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void
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SHA224Update(SHA2_CTX *ctx, const uint8_t *data, size_t len)
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{
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SHA256Update(ctx, data, len);
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}
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void
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SHA224Pad(SHA2_CTX *ctx)
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{
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SHA256Pad(ctx);
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}
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void
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SHA224Final(uint8_t digest[SHA224_DIGEST_LENGTH], SHA2_CTX *ctx)
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{
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SHA256Pad(ctx);
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if (digest != NULL) {
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#if BYTE_ORDER == BIG_ENDIAN
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memcpy(digest, ctx->state.st32, SHA224_DIGEST_LENGTH);
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#else
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unsigned int i;
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for (i = 0; i < 7; i++)
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BE32TO8(digest + (i * 4), ctx->state.st32[i]);
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#endif
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memset(ctx, 0, sizeof(*ctx));
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}
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}
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static const uint32_t SHA256_K[64] = {
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0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
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0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
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0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
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0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
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0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
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0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
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0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
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0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
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0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
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0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
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0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
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0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
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0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
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0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
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0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
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0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
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};
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void
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SHA256Init(SHA2_CTX *ctx)
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{
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memset(ctx, 0, sizeof(*ctx));
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ctx->state.st32[0] = 0x6a09e667UL;
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ctx->state.st32[1] = 0xbb67ae85UL;
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ctx->state.st32[2] = 0x3c6ef372UL;
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ctx->state.st32[3] = 0xa54ff53aUL;
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ctx->state.st32[4] = 0x510e527fUL;
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ctx->state.st32[5] = 0x9b05688cUL;
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ctx->state.st32[6] = 0x1f83d9abUL;
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ctx->state.st32[7] = 0x5be0cd19UL;
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}
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/* Round macros for SHA256 */
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#define R(i) do { \
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h(i)+=S1(e(i))+Ch(e(i),f(i),g(i))+SHA256_K[i+j]+(j?blk2(i):blk0(i)); \
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d(i)+=h(i); \
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h(i)+=S0(a(i))+Maj(a(i),b(i),c(i)); \
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} while (0)
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#define S0(x) (rotrFixed(x,2)^rotrFixed(x,13)^rotrFixed(x,22))
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#define S1(x) (rotrFixed(x,6)^rotrFixed(x,11)^rotrFixed(x,25))
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#define s0(x) (rotrFixed(x,7)^rotrFixed(x,18)^(x>>3))
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#define s1(x) (rotrFixed(x,17)^rotrFixed(x,19)^(x>>10))
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void
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SHA256Transform(uint32_t state[8], const uint8_t data[SHA256_BLOCK_LENGTH])
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{
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uint32_t W[16];
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uint32_t T[8];
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unsigned int j;
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/* Copy context state to working vars. */
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memcpy(T, state, sizeof(T));
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/* Copy data to W in big endian format. */
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#if BYTE_ORDER == BIG_ENDIAN
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memcpy(W, data, sizeof(W));
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#else
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for (j = 0; j < 16; j++) {
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BE8TO32(W[j], data);
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data += 4;
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}
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#endif
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/* 64 operations, partially loop unrolled. */
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for (j = 0; j < 64; j += 16)
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{
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R( 0); R( 1); R( 2); R( 3);
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R( 4); R( 5); R( 6); R( 7);
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R( 8); R( 9); R(10); R(11);
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R(12); R(13); R(14); R(15);
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}
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/* Add the working vars back into context state. */
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state[0] += a(0);
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state[1] += b(0);
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state[2] += c(0);
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state[3] += d(0);
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state[4] += e(0);
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state[5] += f(0);
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state[6] += g(0);
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state[7] += h(0);
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/* Cleanup */
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explicit_bzero(T, sizeof(T));
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explicit_bzero(W, sizeof(W));
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}
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#undef S0
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#undef S1
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#undef s0
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#undef s1
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#undef R
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void
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SHA256Update(SHA2_CTX *ctx, const uint8_t *data, size_t len)
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{
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size_t i = 0, j;
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j = (size_t)((ctx->count[0] >> 3) & (SHA256_BLOCK_LENGTH - 1));
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ctx->count[0] += ((uint64_t)len << 3);
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if ((j + len) > SHA256_BLOCK_LENGTH - 1) {
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memcpy(&ctx->buffer[j], data, (i = SHA256_BLOCK_LENGTH - j));
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SHA256Transform(ctx->state.st32, ctx->buffer);
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for ( ; i + SHA256_BLOCK_LENGTH - 1 < len; i += SHA256_BLOCK_LENGTH)
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SHA256Transform(ctx->state.st32, (uint8_t *)&data[i]);
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j = 0;
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}
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memcpy(&ctx->buffer[j], &data[i], len - i);
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}
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void
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SHA256Pad(SHA2_CTX *ctx)
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{
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uint8_t finalcount[8];
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/* Store unpadded message length in bits in big endian format. */
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BE64TO8(finalcount, ctx->count[0]);
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/* Append a '1' bit (0x80) to the message. */
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SHA256Update(ctx, (uint8_t *)"\200", 1);
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/* Pad message such that the resulting length modulo 512 is 448. */
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while ((ctx->count[0] & 511) != 448)
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SHA256Update(ctx, (uint8_t *)"\0", 1);
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/* Append length of message in bits and do final SHA256Transform(). */
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SHA256Update(ctx, finalcount, sizeof(finalcount));
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}
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void
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SHA256Final(uint8_t digest[SHA256_DIGEST_LENGTH], SHA2_CTX *ctx)
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{
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SHA256Pad(ctx);
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if (digest != NULL) {
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#if BYTE_ORDER == BIG_ENDIAN
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memcpy(digest, ctx->state.st32, SHA256_DIGEST_LENGTH);
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#else
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unsigned int i;
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for (i = 0; i < 8; i++)
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BE32TO8(digest + (i * 4), ctx->state.st32[i]);
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#endif
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memset(ctx, 0, sizeof(*ctx));
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}
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}
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void
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SHA384Init(SHA2_CTX *ctx)
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{
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memset(ctx, 0, sizeof(*ctx));
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ctx->state.st64[0] = 0xcbbb9d5dc1059ed8ULL;
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ctx->state.st64[1] = 0x629a292a367cd507ULL;
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ctx->state.st64[2] = 0x9159015a3070dd17ULL;
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ctx->state.st64[3] = 0x152fecd8f70e5939ULL;
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ctx->state.st64[4] = 0x67332667ffc00b31ULL;
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ctx->state.st64[5] = 0x8eb44a8768581511ULL;
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ctx->state.st64[6] = 0xdb0c2e0d64f98fa7ULL;
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ctx->state.st64[7] = 0x47b5481dbefa4fa4ULL;
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}
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void
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SHA384Transform(uint64_t state[8], const uint8_t data[SHA384_BLOCK_LENGTH])
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{
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SHA512Transform(state, data);
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}
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void
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SHA384Update(SHA2_CTX *ctx, const uint8_t *data, size_t len)
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{
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SHA512Update(ctx, data, len);
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}
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void
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SHA384Pad(SHA2_CTX *ctx)
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{
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SHA512Pad(ctx);
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}
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void
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SHA384Final(uint8_t digest[SHA384_DIGEST_LENGTH], SHA2_CTX *ctx)
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{
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SHA384Pad(ctx);
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if (digest != NULL) {
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#if BYTE_ORDER == BIG_ENDIAN
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memcpy(digest, ctx->state.st64, SHA384_DIGEST_LENGTH);
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#else
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unsigned int i;
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for (i = 0; i < 6; i++)
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BE64TO8(digest + (i * 8), ctx->state.st64[i]);
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#endif
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memset(ctx, 0, sizeof(*ctx));
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}
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}
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static const uint64_t SHA512_K[80] = {
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0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
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0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
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0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
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0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
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0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
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0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
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0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
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0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
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0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
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0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
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0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
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0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
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0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
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0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
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0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
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0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
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0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
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0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
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0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
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0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
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0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
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0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
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0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
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0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
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0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
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0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
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0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
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0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
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0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
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0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
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0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
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0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
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0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
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0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
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0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
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0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
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0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
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0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
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0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
|
|
0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
|
|
};
|
|
|
|
void
|
|
SHA512Init(SHA2_CTX *ctx)
|
|
{
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
ctx->state.st64[0] = 0x6a09e667f3bcc908ULL;
|
|
ctx->state.st64[1] = 0xbb67ae8584caa73bULL;
|
|
ctx->state.st64[2] = 0x3c6ef372fe94f82bULL;
|
|
ctx->state.st64[3] = 0xa54ff53a5f1d36f1ULL;
|
|
ctx->state.st64[4] = 0x510e527fade682d1ULL;
|
|
ctx->state.st64[5] = 0x9b05688c2b3e6c1fULL;
|
|
ctx->state.st64[6] = 0x1f83d9abfb41bd6bULL;
|
|
ctx->state.st64[7] = 0x5be0cd19137e2179ULL;
|
|
}
|
|
|
|
/* Round macros for SHA512 */
|
|
#define R(i) do { \
|
|
h(i)+=S1(e(i))+Ch(e(i),f(i),g(i))+SHA512_K[i+j]+(j?blk2(i):blk0(i)); \
|
|
d(i)+=h(i); \
|
|
h(i)+=S0(a(i))+Maj(a(i),b(i),c(i)); \
|
|
} while (0)
|
|
|
|
#define S0(x) (rotrFixed(x,28)^rotrFixed(x,34)^rotrFixed(x,39))
|
|
#define S1(x) (rotrFixed(x,14)^rotrFixed(x,18)^rotrFixed(x,41))
|
|
#define s0(x) (rotrFixed(x,1)^rotrFixed(x,8)^(x>>7))
|
|
#define s1(x) (rotrFixed(x,19)^rotrFixed(x,61)^(x>>6))
|
|
|
|
void
|
|
SHA512Transform(uint64_t state[8], const uint8_t data[SHA512_BLOCK_LENGTH])
|
|
{
|
|
uint64_t W[16];
|
|
uint64_t T[8];
|
|
unsigned int j;
|
|
|
|
/* Copy context state to working vars. */
|
|
memcpy(T, state, sizeof(T));
|
|
/* Copy data to W in big endian format. */
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
memcpy(W, data, sizeof(W));
|
|
#else
|
|
for (j = 0; j < 16; j++) {
|
|
BE8TO64(W[j], data);
|
|
data += 8;
|
|
}
|
|
#endif
|
|
/* 80 operations, partially loop unrolled. */
|
|
for (j = 0; j < 80; j += 16)
|
|
{
|
|
R( 0); R( 1); R( 2); R( 3);
|
|
R( 4); R( 5); R( 6); R( 7);
|
|
R( 8); R( 9); R(10); R(11);
|
|
R(12); R(13); R(14); R(15);
|
|
}
|
|
/* Add the working vars back into context state. */
|
|
state[0] += a(0);
|
|
state[1] += b(0);
|
|
state[2] += c(0);
|
|
state[3] += d(0);
|
|
state[4] += e(0);
|
|
state[5] += f(0);
|
|
state[6] += g(0);
|
|
state[7] += h(0);
|
|
/* Cleanup. */
|
|
explicit_bzero(T, sizeof(T));
|
|
explicit_bzero(W, sizeof(W));
|
|
}
|
|
|
|
void
|
|
SHA512Update(SHA2_CTX *ctx, const uint8_t *data, size_t len)
|
|
{
|
|
size_t i = 0, j;
|
|
|
|
j = (size_t)((ctx->count[0] >> 3) & (SHA512_BLOCK_LENGTH - 1));
|
|
ctx->count[0] += ((uint64_t)len << 3);
|
|
if (ctx->count[0] < ((uint64_t)len << 3))
|
|
ctx->count[1]++;
|
|
if ((j + len) > SHA512_BLOCK_LENGTH - 1) {
|
|
memcpy(&ctx->buffer[j], data, (i = SHA512_BLOCK_LENGTH - j));
|
|
SHA512Transform(ctx->state.st64, ctx->buffer);
|
|
for ( ; i + SHA512_BLOCK_LENGTH - 1 < len; i += SHA512_BLOCK_LENGTH)
|
|
SHA512Transform(ctx->state.st64, (uint8_t *)&data[i]);
|
|
j = 0;
|
|
}
|
|
memcpy(&ctx->buffer[j], &data[i], len - i);
|
|
}
|
|
|
|
void
|
|
SHA512Pad(SHA2_CTX *ctx)
|
|
{
|
|
uint8_t finalcount[16];
|
|
|
|
/* Store unpadded message length in bits in big endian format. */
|
|
BE64TO8(finalcount, ctx->count[1]);
|
|
BE64TO8(finalcount + 8, ctx->count[0]);
|
|
|
|
/* Append a '1' bit (0x80) to the message. */
|
|
SHA512Update(ctx, (uint8_t *)"\200", 1);
|
|
|
|
/* Pad message such that the resulting length modulo 1024 is 896. */
|
|
while ((ctx->count[0] & 1023) != 896)
|
|
SHA512Update(ctx, (uint8_t *)"\0", 1);
|
|
|
|
/* Append length of message in bits and do final SHA512Transform(). */
|
|
SHA512Update(ctx, finalcount, sizeof(finalcount));
|
|
}
|
|
|
|
void
|
|
SHA512Final(uint8_t digest[SHA512_DIGEST_LENGTH], SHA2_CTX *ctx)
|
|
{
|
|
SHA512Pad(ctx);
|
|
if (digest != NULL) {
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
memcpy(digest, ctx->state.st64, SHA512_DIGEST_LENGTH);
|
|
#else
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
BE64TO8(digest + (i * 8), ctx->state.st64[i]);
|
|
#endif
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
}
|
|
}
|