454 lines
14 KiB
C
454 lines
14 KiB
C
/* $OpenBSD: sha2.c,v 1.28 2019/07/23 12:35:22 dtucker Exp $ */
|
|
|
|
/*
|
|
* FILE: sha2.c
|
|
* AUTHOR: Aaron D. Gifford <me@aarongifford.com>
|
|
*
|
|
* Copyright (c) 2000-2001, Aaron D. Gifford
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the copyright holder nor the names of contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $From: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <endian.h>
|
|
#include <sha2.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
/*** SHA-224/256/384/512 Various Length Definitions ***********************/
|
|
/* NOTE: Most of these are in sha2.h */
|
|
#define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
|
|
|
|
/*** ENDIAN SPECIFIC COPY MACROS **************************************/
|
|
#define BE_8_TO_32(dst, cp) do { \
|
|
(dst) = (uint32_t)(cp)[3] | ((uint32_t)(cp)[2] << 8) | \
|
|
((uint32_t)(cp)[1] << 16) | ((uint32_t)(cp)[0] << 24); \
|
|
} while(0)
|
|
|
|
#define BE_8_TO_64(dst, cp) do { \
|
|
(dst) = (uint64_t)(cp)[7] | ((uint64_t)(cp)[6] << 8) | \
|
|
((uint64_t)(cp)[5] << 16) | ((uint64_t)(cp)[4] << 24) | \
|
|
((uint64_t)(cp)[3] << 32) | ((uint64_t)(cp)[2] << 40) | \
|
|
((uint64_t)(cp)[1] << 48) | ((uint64_t)(cp)[0] << 56); \
|
|
} while (0)
|
|
|
|
#define BE_64_TO_8(cp, src) do { \
|
|
(cp)[0] = (src) >> 56; \
|
|
(cp)[1] = (src) >> 48; \
|
|
(cp)[2] = (src) >> 40; \
|
|
(cp)[3] = (src) >> 32; \
|
|
(cp)[4] = (src) >> 24; \
|
|
(cp)[5] = (src) >> 16; \
|
|
(cp)[6] = (src) >> 8; \
|
|
(cp)[7] = (src); \
|
|
} while (0)
|
|
|
|
#define BE_32_TO_8(cp, src) do { \
|
|
(cp)[0] = (src) >> 24; \
|
|
(cp)[1] = (src) >> 16; \
|
|
(cp)[2] = (src) >> 8; \
|
|
(cp)[3] = (src); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Macro for incrementally adding the unsigned 64-bit integer n to the
|
|
* unsigned 128-bit integer (represented using a two-element array of
|
|
* 64-bit words):
|
|
*/
|
|
#define ADDINC128(w,n) do { \
|
|
(w)[0] += (uint64_t)(n); \
|
|
if ((w)[0] < (n)) { \
|
|
(w)[1]++; \
|
|
} \
|
|
} while (0)
|
|
|
|
/*** THE SIX LOGICAL FUNCTIONS ****************************************/
|
|
/*
|
|
* Bit shifting and rotation (used by the six SHA-XYZ logical functions:
|
|
*
|
|
* NOTE: The naming of R and S appears backwards here (R is a SHIFT and
|
|
* S is a ROTATION) because the SHA-224/256/384/512 description document
|
|
* (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
|
|
* same "backwards" definition.
|
|
*/
|
|
/* Shift-right (used in SHA-224, SHA-256, SHA-384, and SHA-512): */
|
|
#define R(b,x) ((x) >> (b))
|
|
/* 32-bit Rotate-right (used in SHA-224 and SHA-256): */
|
|
#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
|
|
/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
|
|
#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
|
|
|
|
/* Two of six logical functions used in SHA-224, SHA-256, SHA-384, and SHA-512: */
|
|
#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
|
|
#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
|
|
|
|
/* Four of six logical functions used in SHA-224 and SHA-256: */
|
|
#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
|
|
#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
|
|
#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
|
|
#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
|
|
|
|
/* Four of six logical functions used in SHA-384 and SHA-512: */
|
|
#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
|
|
#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
|
|
#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
|
|
#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
|
|
|
|
/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
|
|
/* Hash constant words K for SHA-384 and SHA-512: */
|
|
static const uint64_t K512[80] = {
|
|
0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
|
|
0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
|
|
0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
|
|
0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
|
|
0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
|
|
0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
|
|
0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
|
|
0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
|
|
0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
|
|
0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
|
|
0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
|
|
0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
|
|
0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
|
|
0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
|
|
0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
|
|
0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
|
|
0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
|
|
0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
|
|
0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
|
|
0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
|
|
0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
|
|
0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
|
|
0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
|
|
0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
|
|
0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
|
|
0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
|
|
0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
|
|
0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
|
|
0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
|
|
0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
|
|
0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
|
|
0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
|
|
0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
|
|
0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
|
|
0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
|
|
0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
|
|
0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
|
|
0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
|
|
0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
|
|
0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
|
|
};
|
|
|
|
/* Initial hash value H for SHA-512 */
|
|
static const uint64_t sha512_initial_hash_value[8] = {
|
|
0x6a09e667f3bcc908ULL,
|
|
0xbb67ae8584caa73bULL,
|
|
0x3c6ef372fe94f82bULL,
|
|
0xa54ff53a5f1d36f1ULL,
|
|
0x510e527fade682d1ULL,
|
|
0x9b05688c2b3e6c1fULL,
|
|
0x1f83d9abfb41bd6bULL,
|
|
0x5be0cd19137e2179ULL
|
|
};
|
|
|
|
/*** 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;
|
|
}
|
|
|
|
#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(uint64_t state[8], const uint8_t data[SHA512_BLOCK_LENGTH])
|
|
{
|
|
uint64_t a, b, c, d, e, f, g, h, s0, s1;
|
|
uint64_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(uint64_t state[8], const uint8_t data[SHA512_BLOCK_LENGTH])
|
|
{
|
|
uint64_t a, b, c, d, e, f, g, h, s0, s1;
|
|
uint64_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 */
|
|
|
|
void
|
|
SHA512Update(SHA2_CTX *context, const uint8_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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
SHA512Final(uint8_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));
|
|
}
|