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976 lines
27 KiB
C
976 lines
27 KiB
C
/* $OpenBSD: sha2.c,v 1.28 2019/07/23 12:35:22 dtucker Exp $ */
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/*
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* FILE: sha2.c
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* AUTHOR: Aaron D. Gifford <me@aarongifford.com>
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*
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* Copyright (c) 2000-2001, Aaron D. Gifford
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $From: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
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*/
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#include <sys/types.h>
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#include <string.h>
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#include <sha2.h>
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/*
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* UNROLLED TRANSFORM LOOP NOTE:
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* You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
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* loop version for the hash transform rounds (defined using macros
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* later in this file). Either define on the command line, for example:
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*
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* cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
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*
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* or define below:
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*
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* #define SHA2_UNROLL_TRANSFORM
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*
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*/
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#ifndef SHA2_SMALL
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#if defined(__amd64__) || defined(__i386__)
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#define SHA2_UNROLL_TRANSFORM
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#endif
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#endif
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/*** SHA-224/256/384/512 Machine Architecture Definitions *****************/
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/*
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* BYTE_ORDER NOTE:
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*
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* Please make sure that your system defines BYTE_ORDER. If your
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* architecture is little-endian, make sure it also defines
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* LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are
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* equivalent.
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*
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* If your system does not define the above, then you can do so by
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* hand like this:
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*
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* #define LITTLE_ENDIAN 1234
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* #define BIG_ENDIAN 4321
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*
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* And for little-endian machines, add:
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*
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* #define BYTE_ORDER LITTLE_ENDIAN
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*
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* Or for big-endian machines:
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*
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* #define BYTE_ORDER BIG_ENDIAN
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*
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* The FreeBSD machine this was written on defines BYTE_ORDER
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* appropriately by including <sys/types.h> (which in turn includes
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* <machine/endian.h> where the appropriate definitions are actually
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* made).
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*/
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#if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
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#error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
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#endif
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/*** SHA-224/256/384/512 Various Length Definitions ***********************/
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/* NOTE: Most of these are in sha2.h */
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#define SHA224_SHORT_BLOCK_LENGTH (SHA224_BLOCK_LENGTH - 8)
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#define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
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#define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16)
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#define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
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/*** ENDIAN SPECIFIC COPY MACROS **************************************/
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#define BE_8_TO_32(dst, cp) do { \
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(dst) = (u_int32_t)(cp)[3] | ((u_int32_t)(cp)[2] << 8) | \
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((u_int32_t)(cp)[1] << 16) | ((u_int32_t)(cp)[0] << 24); \
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} while(0)
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#define BE_8_TO_64(dst, cp) do { \
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(dst) = (u_int64_t)(cp)[7] | ((u_int64_t)(cp)[6] << 8) | \
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((u_int64_t)(cp)[5] << 16) | ((u_int64_t)(cp)[4] << 24) | \
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((u_int64_t)(cp)[3] << 32) | ((u_int64_t)(cp)[2] << 40) | \
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((u_int64_t)(cp)[1] << 48) | ((u_int64_t)(cp)[0] << 56); \
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} while (0)
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#define BE_64_TO_8(cp, src) do { \
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(cp)[0] = (src) >> 56; \
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(cp)[1] = (src) >> 48; \
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(cp)[2] = (src) >> 40; \
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(cp)[3] = (src) >> 32; \
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(cp)[4] = (src) >> 24; \
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(cp)[5] = (src) >> 16; \
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(cp)[6] = (src) >> 8; \
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(cp)[7] = (src); \
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} while (0)
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#define BE_32_TO_8(cp, src) do { \
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(cp)[0] = (src) >> 24; \
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(cp)[1] = (src) >> 16; \
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(cp)[2] = (src) >> 8; \
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(cp)[3] = (src); \
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} while (0)
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/*
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* Macro for incrementally adding the unsigned 64-bit integer n to the
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* unsigned 128-bit integer (represented using a two-element array of
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* 64-bit words):
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*/
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#define ADDINC128(w,n) do { \
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(w)[0] += (u_int64_t)(n); \
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if ((w)[0] < (n)) { \
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(w)[1]++; \
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} \
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} while (0)
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/*** THE SIX LOGICAL FUNCTIONS ****************************************/
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/*
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* Bit shifting and rotation (used by the six SHA-XYZ logical functions:
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*
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* NOTE: The naming of R and S appears backwards here (R is a SHIFT and
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* S is a ROTATION) because the SHA-224/256/384/512 description document
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* (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
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* same "backwards" definition.
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*/
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/* Shift-right (used in SHA-224, SHA-256, SHA-384, and SHA-512): */
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#define R(b,x) ((x) >> (b))
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/* 32-bit Rotate-right (used in SHA-224 and SHA-256): */
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#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
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/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
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#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
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/* Two of six logical functions used in SHA-224, SHA-256, SHA-384, and SHA-512: */
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#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
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#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
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/* Four of six logical functions used in SHA-224 and SHA-256: */
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#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
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#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
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#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
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#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
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/* Four of six logical functions used in SHA-384 and SHA-512: */
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#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
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#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
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#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
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#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
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/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
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/* Hash constant words K for SHA-224 and SHA-256: */
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static const u_int32_t K256[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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/* Initial hash value H for SHA-256: */
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static const u_int32_t sha256_initial_hash_value[8] = {
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0x6a09e667UL,
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0xbb67ae85UL,
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0x3c6ef372UL,
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0xa54ff53aUL,
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0x510e527fUL,
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0x9b05688cUL,
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0x1f83d9abUL,
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0x5be0cd19UL
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};
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/* Hash constant words K for SHA-384 and SHA-512: */
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static const u_int64_t K512[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,
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0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
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};
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/* Initial hash value H for SHA-512 */
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static const u_int64_t sha512_initial_hash_value[8] = {
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0x6a09e667f3bcc908ULL,
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0xbb67ae8584caa73bULL,
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0x3c6ef372fe94f82bULL,
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0xa54ff53a5f1d36f1ULL,
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0x510e527fade682d1ULL,
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0x9b05688c2b3e6c1fULL,
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0x1f83d9abfb41bd6bULL,
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0x5be0cd19137e2179ULL
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};
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#if !defined(SHA2_SMALL)
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/* Initial hash value H for SHA-224: */
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static const u_int32_t sha224_initial_hash_value[8] = {
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0xc1059ed8UL,
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0x367cd507UL,
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0x3070dd17UL,
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0xf70e5939UL,
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0xffc00b31UL,
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0x68581511UL,
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0x64f98fa7UL,
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0xbefa4fa4UL
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};
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/* Initial hash value H for SHA-384 */
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static const u_int64_t sha384_initial_hash_value[8] = {
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0xcbbb9d5dc1059ed8ULL,
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0x629a292a367cd507ULL,
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0x9159015a3070dd17ULL,
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0x152fecd8f70e5939ULL,
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0x67332667ffc00b31ULL,
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0x8eb44a8768581511ULL,
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0xdb0c2e0d64f98fa7ULL,
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0x47b5481dbefa4fa4ULL
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};
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/* Initial hash value H for SHA-512-256 */
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static const u_int64_t sha512_256_initial_hash_value[8] = {
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0x22312194fc2bf72cULL,
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0x9f555fa3c84c64c2ULL,
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0x2393b86b6f53b151ULL,
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0x963877195940eabdULL,
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0x96283ee2a88effe3ULL,
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0xbe5e1e2553863992ULL,
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0x2b0199fc2c85b8aaULL,
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0x0eb72ddc81c52ca2ULL
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};
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/*** SHA-224: *********************************************************/
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void
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SHA224Init(SHA2_CTX *context)
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{
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memcpy(context->state.st32, sha224_initial_hash_value,
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sizeof(sha224_initial_hash_value));
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memset(context->buffer, 0, sizeof(context->buffer));
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context->bitcount[0] = 0;
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}
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DEF_WEAK(SHA224Init);
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MAKE_CLONE(SHA224Transform, SHA256Transform);
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MAKE_CLONE(SHA224Update, SHA256Update);
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MAKE_CLONE(SHA224Pad, SHA256Pad);
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DEF_WEAK(SHA224Transform);
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DEF_WEAK(SHA224Update);
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DEF_WEAK(SHA224Pad);
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void
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SHA224Final(u_int8_t digest[SHA224_DIGEST_LENGTH], SHA2_CTX *context)
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{
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SHA224Pad(context);
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#if BYTE_ORDER == LITTLE_ENDIAN
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int i;
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/* Convert TO host byte order */
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for (i = 0; i < 7; i++)
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BE_32_TO_8(digest + i * 4, context->state.st32[i]);
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#else
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memcpy(digest, context->state.st32, SHA224_DIGEST_LENGTH);
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#endif
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explicit_bzero(context, sizeof(*context));
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}
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DEF_WEAK(SHA224Final);
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#endif /* !defined(SHA2_SMALL) */
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/*** SHA-256: *********************************************************/
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void
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SHA256Init(SHA2_CTX *context)
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{
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memcpy(context->state.st32, sha256_initial_hash_value,
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sizeof(sha256_initial_hash_value));
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memset(context->buffer, 0, sizeof(context->buffer));
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context->bitcount[0] = 0;
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}
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DEF_WEAK(SHA256Init);
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#ifdef SHA2_UNROLL_TRANSFORM
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/* Unrolled SHA-256 round macros: */
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#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) do { \
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BE_8_TO_32(W256[j], data); \
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data += 4; \
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T1 = (h) + Sigma1_256((e)) + Ch((e), (f), (g)) + K256[j] + W256[j]; \
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(d) += T1; \
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(h) = T1 + Sigma0_256((a)) + Maj((a), (b), (c)); \
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j++; \
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} while(0)
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#define ROUND256(a,b,c,d,e,f,g,h) do { \
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s0 = W256[(j+1)&0x0f]; \
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s0 = sigma0_256(s0); \
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s1 = W256[(j+14)&0x0f]; \
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s1 = sigma1_256(s1); \
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T1 = (h) + Sigma1_256((e)) + Ch((e), (f), (g)) + K256[j] + \
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(W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
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(d) += T1; \
|
|
(h) = T1 + Sigma0_256((a)) + Maj((a), (b), (c)); \
|
|
j++; \
|
|
} while(0)
|
|
|
|
void
|
|
SHA256Transform(u_int32_t state[8], const u_int8_t data[SHA256_BLOCK_LENGTH])
|
|
{
|
|
u_int32_t a, b, c, d, e, f, g, h, s0, s1;
|
|
u_int32_t T1, W256[16];
|
|
int j;
|
|
|
|
/* Initialize registers with the prev. intermediate value */
|
|
a = state[0];
|
|
b = state[1];
|
|
c = state[2];
|
|
d = state[3];
|
|
e = state[4];
|
|
f = state[5];
|
|
g = state[6];
|
|
h = state[7];
|
|
|
|
j = 0;
|
|
do {
|
|
/* Rounds 0 to 15 (unrolled): */
|
|
ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
|
|
ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
|
|
ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
|
|
ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
|
|
ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
|
|
ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
|
|
ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
|
|
ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
|
|
} while (j < 16);
|
|
|
|
/* Now for the remaining rounds up to 63: */
|
|
do {
|
|
ROUND256(a,b,c,d,e,f,g,h);
|
|
ROUND256(h,a,b,c,d,e,f,g);
|
|
ROUND256(g,h,a,b,c,d,e,f);
|
|
ROUND256(f,g,h,a,b,c,d,e);
|
|
ROUND256(e,f,g,h,a,b,c,d);
|
|
ROUND256(d,e,f,g,h,a,b,c);
|
|
ROUND256(c,d,e,f,g,h,a,b);
|
|
ROUND256(b,c,d,e,f,g,h,a);
|
|
} while (j < 64);
|
|
|
|
/* Compute the current intermediate hash value */
|
|
state[0] += a;
|
|
state[1] += b;
|
|
state[2] += c;
|
|
state[3] += d;
|
|
state[4] += e;
|
|
state[5] += f;
|
|
state[6] += g;
|
|
state[7] += h;
|
|
|
|
/* Clean up */
|
|
a = b = c = d = e = f = g = h = T1 = 0;
|
|
}
|
|
|
|
#else /* SHA2_UNROLL_TRANSFORM */
|
|
|
|
void
|
|
SHA256Transform(u_int32_t state[8], const u_int8_t data[SHA256_BLOCK_LENGTH])
|
|
{
|
|
u_int32_t a, b, c, d, e, f, g, h, s0, s1;
|
|
u_int32_t T1, T2, W256[16];
|
|
int j;
|
|
|
|
/* Initialize registers with the prev. intermediate value */
|
|
a = state[0];
|
|
b = state[1];
|
|
c = state[2];
|
|
d = state[3];
|
|
e = state[4];
|
|
f = state[5];
|
|
g = state[6];
|
|
h = state[7];
|
|
|
|
j = 0;
|
|
do {
|
|
BE_8_TO_32(W256[j], data);
|
|
data += 4;
|
|
/* Apply the SHA-256 compression function to update a..h */
|
|
T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
|
|
T2 = Sigma0_256(a) + Maj(a, b, c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
|
|
j++;
|
|
} while (j < 16);
|
|
|
|
do {
|
|
/* Part of the message block expansion: */
|
|
s0 = W256[(j+1)&0x0f];
|
|
s0 = sigma0_256(s0);
|
|
s1 = W256[(j+14)&0x0f];
|
|
s1 = sigma1_256(s1);
|
|
|
|
/* Apply the SHA-256 compression function to update a..h */
|
|
T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
|
|
(W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
|
|
T2 = Sigma0_256(a) + Maj(a, b, c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
|
|
j++;
|
|
} while (j < 64);
|
|
|
|
/* Compute the current intermediate hash value */
|
|
state[0] += a;
|
|
state[1] += b;
|
|
state[2] += c;
|
|
state[3] += d;
|
|
state[4] += e;
|
|
state[5] += f;
|
|
state[6] += g;
|
|
state[7] += h;
|
|
|
|
/* Clean up */
|
|
a = b = c = d = e = f = g = h = T1 = T2 = 0;
|
|
}
|
|
|
|
#endif /* SHA2_UNROLL_TRANSFORM */
|
|
DEF_WEAK(SHA256Transform);
|
|
|
|
void
|
|
SHA256Update(SHA2_CTX *context, const u_int8_t *data, size_t len)
|
|
{
|
|
u_int64_t freespace, usedspace;
|
|
|
|
/* Calling with no data is valid (we do nothing) */
|
|
if (len == 0)
|
|
return;
|
|
|
|
usedspace = (context->bitcount[0] >> 3) % SHA256_BLOCK_LENGTH;
|
|
if (usedspace > 0) {
|
|
/* Calculate how much free space is available in the buffer */
|
|
freespace = SHA256_BLOCK_LENGTH - usedspace;
|
|
|
|
if (len >= freespace) {
|
|
/* Fill the buffer completely and process it */
|
|
memcpy(&context->buffer[usedspace], data, freespace);
|
|
context->bitcount[0] += freespace << 3;
|
|
len -= freespace;
|
|
data += freespace;
|
|
SHA256Transform(context->state.st32, context->buffer);
|
|
} else {
|
|
/* The buffer is not yet full */
|
|
memcpy(&context->buffer[usedspace], data, len);
|
|
context->bitcount[0] += (u_int64_t)len << 3;
|
|
/* Clean up: */
|
|
usedspace = freespace = 0;
|
|
return;
|
|
}
|
|
}
|
|
while (len >= SHA256_BLOCK_LENGTH) {
|
|
/* Process as many complete blocks as we can */
|
|
SHA256Transform(context->state.st32, data);
|
|
context->bitcount[0] += SHA256_BLOCK_LENGTH << 3;
|
|
len -= SHA256_BLOCK_LENGTH;
|
|
data += SHA256_BLOCK_LENGTH;
|
|
}
|
|
if (len > 0) {
|
|
/* There's left-overs, so save 'em */
|
|
memcpy(context->buffer, data, len);
|
|
context->bitcount[0] += len << 3;
|
|
}
|
|
/* Clean up: */
|
|
usedspace = freespace = 0;
|
|
}
|
|
DEF_WEAK(SHA256Update);
|
|
|
|
void
|
|
SHA256Pad(SHA2_CTX *context)
|
|
{
|
|
unsigned int usedspace;
|
|
|
|
usedspace = (context->bitcount[0] >> 3) % SHA256_BLOCK_LENGTH;
|
|
if (usedspace > 0) {
|
|
/* Begin padding with a 1 bit: */
|
|
context->buffer[usedspace++] = 0x80;
|
|
|
|
if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
|
|
/* Set-up for the last transform: */
|
|
memset(&context->buffer[usedspace], 0,
|
|
SHA256_SHORT_BLOCK_LENGTH - usedspace);
|
|
} else {
|
|
if (usedspace < SHA256_BLOCK_LENGTH) {
|
|
memset(&context->buffer[usedspace], 0,
|
|
SHA256_BLOCK_LENGTH - usedspace);
|
|
}
|
|
/* Do second-to-last transform: */
|
|
SHA256Transform(context->state.st32, context->buffer);
|
|
|
|
/* Prepare for last transform: */
|
|
memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH);
|
|
}
|
|
} else {
|
|
/* Set-up for the last transform: */
|
|
memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH);
|
|
|
|
/* Begin padding with a 1 bit: */
|
|
*context->buffer = 0x80;
|
|
}
|
|
/* Store the length of input data (in bits) in big endian format: */
|
|
BE_64_TO_8(&context->buffer[SHA256_SHORT_BLOCK_LENGTH],
|
|
context->bitcount[0]);
|
|
|
|
/* Final transform: */
|
|
SHA256Transform(context->state.st32, context->buffer);
|
|
|
|
/* Clean up: */
|
|
usedspace = 0;
|
|
}
|
|
DEF_WEAK(SHA256Pad);
|
|
|
|
void
|
|
SHA256Final(u_int8_t digest[SHA256_DIGEST_LENGTH], SHA2_CTX *context)
|
|
{
|
|
SHA256Pad(context);
|
|
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
int i;
|
|
|
|
/* Convert TO host byte order */
|
|
for (i = 0; i < 8; i++)
|
|
BE_32_TO_8(digest + i * 4, context->state.st32[i]);
|
|
#else
|
|
memcpy(digest, context->state.st32, SHA256_DIGEST_LENGTH);
|
|
#endif
|
|
explicit_bzero(context, sizeof(*context));
|
|
}
|
|
DEF_WEAK(SHA256Final);
|
|
|
|
|
|
/*** SHA-512: *********************************************************/
|
|
void
|
|
SHA512Init(SHA2_CTX *context)
|
|
{
|
|
memcpy(context->state.st64, sha512_initial_hash_value,
|
|
sizeof(sha512_initial_hash_value));
|
|
memset(context->buffer, 0, sizeof(context->buffer));
|
|
context->bitcount[0] = context->bitcount[1] = 0;
|
|
}
|
|
DEF_WEAK(SHA512Init);
|
|
|
|
#ifdef SHA2_UNROLL_TRANSFORM
|
|
|
|
/* Unrolled SHA-512 round macros: */
|
|
|
|
#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) do { \
|
|
BE_8_TO_64(W512[j], data); \
|
|
data += 8; \
|
|
T1 = (h) + Sigma1_512((e)) + Ch((e), (f), (g)) + K512[j] + W512[j]; \
|
|
(d) += T1; \
|
|
(h) = T1 + Sigma0_512((a)) + Maj((a), (b), (c)); \
|
|
j++; \
|
|
} while(0)
|
|
|
|
|
|
#define ROUND512(a,b,c,d,e,f,g,h) do { \
|
|
s0 = W512[(j+1)&0x0f]; \
|
|
s0 = sigma0_512(s0); \
|
|
s1 = W512[(j+14)&0x0f]; \
|
|
s1 = sigma1_512(s1); \
|
|
T1 = (h) + Sigma1_512((e)) + Ch((e), (f), (g)) + K512[j] + \
|
|
(W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
|
|
(d) += T1; \
|
|
(h) = T1 + Sigma0_512((a)) + Maj((a), (b), (c)); \
|
|
j++; \
|
|
} while(0)
|
|
|
|
void
|
|
SHA512Transform(u_int64_t state[8], const u_int8_t data[SHA512_BLOCK_LENGTH])
|
|
{
|
|
u_int64_t a, b, c, d, e, f, g, h, s0, s1;
|
|
u_int64_t T1, W512[16];
|
|
int j;
|
|
|
|
/* Initialize registers with the prev. intermediate value */
|
|
a = state[0];
|
|
b = state[1];
|
|
c = state[2];
|
|
d = state[3];
|
|
e = state[4];
|
|
f = state[5];
|
|
g = state[6];
|
|
h = state[7];
|
|
|
|
j = 0;
|
|
do {
|
|
/* Rounds 0 to 15 (unrolled): */
|
|
ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
|
|
ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
|
|
ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
|
|
ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
|
|
ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
|
|
ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
|
|
ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
|
|
ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
|
|
} while (j < 16);
|
|
|
|
/* Now for the remaining rounds up to 79: */
|
|
do {
|
|
ROUND512(a,b,c,d,e,f,g,h);
|
|
ROUND512(h,a,b,c,d,e,f,g);
|
|
ROUND512(g,h,a,b,c,d,e,f);
|
|
ROUND512(f,g,h,a,b,c,d,e);
|
|
ROUND512(e,f,g,h,a,b,c,d);
|
|
ROUND512(d,e,f,g,h,a,b,c);
|
|
ROUND512(c,d,e,f,g,h,a,b);
|
|
ROUND512(b,c,d,e,f,g,h,a);
|
|
} while (j < 80);
|
|
|
|
/* Compute the current intermediate hash value */
|
|
state[0] += a;
|
|
state[1] += b;
|
|
state[2] += c;
|
|
state[3] += d;
|
|
state[4] += e;
|
|
state[5] += f;
|
|
state[6] += g;
|
|
state[7] += h;
|
|
|
|
/* Clean up */
|
|
a = b = c = d = e = f = g = h = T1 = 0;
|
|
}
|
|
|
|
#else /* SHA2_UNROLL_TRANSFORM */
|
|
|
|
void
|
|
SHA512Transform(u_int64_t state[8], const u_int8_t data[SHA512_BLOCK_LENGTH])
|
|
{
|
|
u_int64_t a, b, c, d, e, f, g, h, s0, s1;
|
|
u_int64_t T1, T2, W512[16];
|
|
int j;
|
|
|
|
/* Initialize registers with the prev. intermediate value */
|
|
a = state[0];
|
|
b = state[1];
|
|
c = state[2];
|
|
d = state[3];
|
|
e = state[4];
|
|
f = state[5];
|
|
g = state[6];
|
|
h = state[7];
|
|
|
|
j = 0;
|
|
do {
|
|
BE_8_TO_64(W512[j], data);
|
|
data += 8;
|
|
/* Apply the SHA-512 compression function to update a..h */
|
|
T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
|
|
T2 = Sigma0_512(a) + Maj(a, b, c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
|
|
j++;
|
|
} while (j < 16);
|
|
|
|
do {
|
|
/* Part of the message block expansion: */
|
|
s0 = W512[(j+1)&0x0f];
|
|
s0 = sigma0_512(s0);
|
|
s1 = W512[(j+14)&0x0f];
|
|
s1 = sigma1_512(s1);
|
|
|
|
/* Apply the SHA-512 compression function to update a..h */
|
|
T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
|
|
(W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
|
|
T2 = Sigma0_512(a) + Maj(a, b, c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
|
|
j++;
|
|
} while (j < 80);
|
|
|
|
/* Compute the current intermediate hash value */
|
|
state[0] += a;
|
|
state[1] += b;
|
|
state[2] += c;
|
|
state[3] += d;
|
|
state[4] += e;
|
|
state[5] += f;
|
|
state[6] += g;
|
|
state[7] += h;
|
|
|
|
/* Clean up */
|
|
a = b = c = d = e = f = g = h = T1 = T2 = 0;
|
|
}
|
|
|
|
#endif /* SHA2_UNROLL_TRANSFORM */
|
|
DEF_WEAK(SHA512Transform);
|
|
|
|
void
|
|
SHA512Update(SHA2_CTX *context, const u_int8_t *data, size_t len)
|
|
{
|
|
size_t freespace, usedspace;
|
|
|
|
/* Calling with no data is valid (we do nothing) */
|
|
if (len == 0)
|
|
return;
|
|
|
|
usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
|
|
if (usedspace > 0) {
|
|
/* Calculate how much free space is available in the buffer */
|
|
freespace = SHA512_BLOCK_LENGTH - usedspace;
|
|
|
|
if (len >= freespace) {
|
|
/* Fill the buffer completely and process it */
|
|
memcpy(&context->buffer[usedspace], data, freespace);
|
|
ADDINC128(context->bitcount, freespace << 3);
|
|
len -= freespace;
|
|
data += freespace;
|
|
SHA512Transform(context->state.st64, context->buffer);
|
|
} else {
|
|
/* The buffer is not yet full */
|
|
memcpy(&context->buffer[usedspace], data, len);
|
|
ADDINC128(context->bitcount, len << 3);
|
|
/* Clean up: */
|
|
usedspace = freespace = 0;
|
|
return;
|
|
}
|
|
}
|
|
while (len >= SHA512_BLOCK_LENGTH) {
|
|
/* Process as many complete blocks as we can */
|
|
SHA512Transform(context->state.st64, data);
|
|
ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
|
|
len -= SHA512_BLOCK_LENGTH;
|
|
data += SHA512_BLOCK_LENGTH;
|
|
}
|
|
if (len > 0) {
|
|
/* There's left-overs, so save 'em */
|
|
memcpy(context->buffer, data, len);
|
|
ADDINC128(context->bitcount, len << 3);
|
|
}
|
|
/* Clean up: */
|
|
usedspace = freespace = 0;
|
|
}
|
|
DEF_WEAK(SHA512Update);
|
|
|
|
void
|
|
SHA512Pad(SHA2_CTX *context)
|
|
{
|
|
unsigned int usedspace;
|
|
|
|
usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
|
|
if (usedspace > 0) {
|
|
/* Begin padding with a 1 bit: */
|
|
context->buffer[usedspace++] = 0x80;
|
|
|
|
if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
|
|
/* Set-up for the last transform: */
|
|
memset(&context->buffer[usedspace], 0, SHA512_SHORT_BLOCK_LENGTH - usedspace);
|
|
} else {
|
|
if (usedspace < SHA512_BLOCK_LENGTH) {
|
|
memset(&context->buffer[usedspace], 0, SHA512_BLOCK_LENGTH - usedspace);
|
|
}
|
|
/* Do second-to-last transform: */
|
|
SHA512Transform(context->state.st64, context->buffer);
|
|
|
|
/* And set-up for the last transform: */
|
|
memset(context->buffer, 0, SHA512_BLOCK_LENGTH - 2);
|
|
}
|
|
} else {
|
|
/* Prepare for final transform: */
|
|
memset(context->buffer, 0, SHA512_SHORT_BLOCK_LENGTH);
|
|
|
|
/* Begin padding with a 1 bit: */
|
|
*context->buffer = 0x80;
|
|
}
|
|
/* Store the length of input data (in bits) in big endian format: */
|
|
BE_64_TO_8(&context->buffer[SHA512_SHORT_BLOCK_LENGTH],
|
|
context->bitcount[1]);
|
|
BE_64_TO_8(&context->buffer[SHA512_SHORT_BLOCK_LENGTH + 8],
|
|
context->bitcount[0]);
|
|
|
|
/* Final transform: */
|
|
SHA512Transform(context->state.st64, context->buffer);
|
|
|
|
/* Clean up: */
|
|
usedspace = 0;
|
|
}
|
|
DEF_WEAK(SHA512Pad);
|
|
|
|
void
|
|
SHA512Final(u_int8_t digest[SHA512_DIGEST_LENGTH], SHA2_CTX *context)
|
|
{
|
|
SHA512Pad(context);
|
|
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
int i;
|
|
|
|
/* Convert TO host byte order */
|
|
for (i = 0; i < 8; i++)
|
|
BE_64_TO_8(digest + i * 8, context->state.st64[i]);
|
|
#else
|
|
memcpy(digest, context->state.st64, SHA512_DIGEST_LENGTH);
|
|
#endif
|
|
explicit_bzero(context, sizeof(*context));
|
|
}
|
|
DEF_WEAK(SHA512Final);
|
|
|
|
#if !defined(SHA2_SMALL)
|
|
|
|
/*** SHA-384: *********************************************************/
|
|
void
|
|
SHA384Init(SHA2_CTX *context)
|
|
{
|
|
memcpy(context->state.st64, sha384_initial_hash_value,
|
|
sizeof(sha384_initial_hash_value));
|
|
memset(context->buffer, 0, sizeof(context->buffer));
|
|
context->bitcount[0] = context->bitcount[1] = 0;
|
|
}
|
|
DEF_WEAK(SHA384Init);
|
|
|
|
MAKE_CLONE(SHA384Transform, SHA512Transform);
|
|
MAKE_CLONE(SHA384Update, SHA512Update);
|
|
MAKE_CLONE(SHA384Pad, SHA512Pad);
|
|
DEF_WEAK(SHA384Transform);
|
|
DEF_WEAK(SHA384Update);
|
|
DEF_WEAK(SHA384Pad);
|
|
|
|
void
|
|
SHA384Final(u_int8_t digest[SHA384_DIGEST_LENGTH], SHA2_CTX *context)
|
|
{
|
|
SHA384Pad(context);
|
|
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
int i;
|
|
|
|
/* Convert TO host byte order */
|
|
for (i = 0; i < 6; i++)
|
|
BE_64_TO_8(digest + i * 8, context->state.st64[i]);
|
|
#else
|
|
memcpy(digest, context->state.st64, SHA384_DIGEST_LENGTH);
|
|
#endif
|
|
/* Zero out state data */
|
|
explicit_bzero(context, sizeof(*context));
|
|
}
|
|
DEF_WEAK(SHA384Final);
|
|
|
|
/*** SHA-512/256: *********************************************************/
|
|
void
|
|
SHA512_256Init(SHA2_CTX *context)
|
|
{
|
|
memcpy(context->state.st64, sha512_256_initial_hash_value,
|
|
sizeof(sha512_256_initial_hash_value));
|
|
memset(context->buffer, 0, sizeof(context->buffer));
|
|
context->bitcount[0] = context->bitcount[1] = 0;
|
|
}
|
|
DEF_WEAK(SHA512_256Init);
|
|
|
|
MAKE_CLONE(SHA512_256Transform, SHA512Transform);
|
|
MAKE_CLONE(SHA512_256Update, SHA512Update);
|
|
MAKE_CLONE(SHA512_256Pad, SHA512Pad);
|
|
DEF_WEAK(SHA512_256Transform);
|
|
DEF_WEAK(SHA512_256Update);
|
|
DEF_WEAK(SHA512_256Pad);
|
|
|
|
void
|
|
SHA512_256Final(u_int8_t digest[SHA512_256_DIGEST_LENGTH], SHA2_CTX *context)
|
|
{
|
|
SHA512_256Pad(context);
|
|
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
int i;
|
|
|
|
/* Convert TO host byte order */
|
|
for (i = 0; i < 4; i++)
|
|
BE_64_TO_8(digest + i * 8, context->state.st64[i]);
|
|
#else
|
|
memcpy(digest, context->state.st64, SHA512_256_DIGEST_LENGTH);
|
|
#endif
|
|
/* Zero out state data */
|
|
explicit_bzero(context, sizeof(*context));
|
|
}
|
|
DEF_WEAK(SHA512_256Final);
|
|
#endif /* !defined(SHA2_SMALL) */
|