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OpenCellular/firmware/lib/cryptolib/sha256.c
Adam Langley 9978e0aa00 vboot: fix name-collision with OpenSSL. 
vboot currently uses the |SHA256_CTX| name, which is claimed by OpenSSL.
To work around this, it defines OPENSSL_NO_SHA, but that can't be done
at compile time:

The OPENSSL_NO_* defines are set by OpenSSL to reflect the configuration
that it was built with so that users of OpenSSL can disable features as
needed. They can affect the contents of structures any thus the ABI of
the library.

If these defines are set outside of OpenSSL, then the library and the
code that uses it will have incompatible ABIs. At that point it's only
functioning by blind luck.

This change renames the name-collisions so that this hack isn't needed.
This is the same change as was made internally in cl/85758149.

BUG=none
BRANCH=none
TEST=emerge-samus coreboot; make runtests

Change-Id: I709da2507f341896d89d50129ce30ffb111a20d1
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/263506
Reviewed-by: Randall Spangler <rspangler@chromium.org>
2015-04-02 00:54:07 +00:00

343 lines
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/* SHA-256 and SHA-512 implementation based on code by Oliver Gay
* <olivier.gay@a3.epfl.ch> under a BSD-style license. See below.
*/
/*
* FIPS 180-2 SHA-224/256/384/512 implementation
* Last update: 02/02/2007
* Issue date: 04/30/2005
*
* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
* 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 project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
*/
#include "sysincludes.h"
#include "cryptolib.h"
#include "utility.h"
#define SHFR(x, n) (x >> n)
#define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
#define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
#define CH(x, y, z) ((x & y) ^ (~x & z))
#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
#define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
#define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
#define UNPACK32(x, str) \
{ \
*((str) + 3) = (uint8_t) ((x) ); \
*((str) + 2) = (uint8_t) ((x) >> 8); \
*((str) + 1) = (uint8_t) ((x) >> 16); \
*((str) + 0) = (uint8_t) ((x) >> 24); \
}
#define PACK32(str, x) \
{ \
*(x) = ((uint32_t) *((str) + 3) ) \
| ((uint32_t) *((str) + 2) << 8) \
| ((uint32_t) *((str) + 1) << 16) \
| ((uint32_t) *((str) + 0) << 24); \
}
/* Macros used for loops unrolling */
#define SHA256_SCR(i) \
{ \
w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
+ SHA256_F3(w[i - 15]) + w[i - 16]; \
}
#define SHA256_EXP(a, b, c, d, e, f, g, h, j) \
{ \
t1 = wv[h] + SHA256_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) \
+ sha256_k[j] + w[j]; \
t2 = SHA256_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
wv[d] += t1; \
wv[h] = t1 + t2; \
}
static const uint32_t sha256_h0[8] = {
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
static const uint32_t sha256_k[64] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};
/* SHA-256 implementation */
void SHA256_init(VB_SHA256_CTX *ctx) {
#ifndef UNROLL_LOOPS
int i;
for (i = 0; i < 8; i++) {
ctx->h[i] = sha256_h0[i];
}
#else
ctx->h[0] = sha256_h0[0]; ctx->h[1] = sha256_h0[1];
ctx->h[2] = sha256_h0[2]; ctx->h[3] = sha256_h0[3];
ctx->h[4] = sha256_h0[4]; ctx->h[5] = sha256_h0[5];
ctx->h[6] = sha256_h0[6]; ctx->h[7] = sha256_h0[7];
#endif /* !UNROLL_LOOPS */
ctx->len = 0;
ctx->tot_len = 0;
}
static void SHA256_transform(VB_SHA256_CTX* ctx, const uint8_t* message,
unsigned int block_nb) {
uint32_t w[64];
uint32_t wv[8];
uint32_t t1, t2;
const unsigned char *sub_block;
int i;
#ifndef UNROLL_LOOPS
int j;
#endif
for (i = 0; i < (int) block_nb; i++) {
sub_block = message + (i << 6);
#ifndef UNROLL_LOOPS
for (j = 0; j < 16; j++) {
PACK32(&sub_block[j << 2], &w[j]);
}
for (j = 16; j < 64; j++) {
SHA256_SCR(j);
}
for (j = 0; j < 8; j++) {
wv[j] = ctx->h[j];
}
for (j = 0; j < 64; j++) {
t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6])
+ sha256_k[j] + w[j];
t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
wv[7] = wv[6];
wv[6] = wv[5];
wv[5] = wv[4];
wv[4] = wv[3] + t1;
wv[3] = wv[2];
wv[2] = wv[1];
wv[1] = wv[0];
wv[0] = t1 + t2;
}
for (j = 0; j < 8; j++) {
ctx->h[j] += wv[j];
}
#else
PACK32(&sub_block[ 0], &w[ 0]); PACK32(&sub_block[ 4], &w[ 1]);
PACK32(&sub_block[ 8], &w[ 2]); PACK32(&sub_block[12], &w[ 3]);
PACK32(&sub_block[16], &w[ 4]); PACK32(&sub_block[20], &w[ 5]);
PACK32(&sub_block[24], &w[ 6]); PACK32(&sub_block[28], &w[ 7]);
PACK32(&sub_block[32], &w[ 8]); PACK32(&sub_block[36], &w[ 9]);
PACK32(&sub_block[40], &w[10]); PACK32(&sub_block[44], &w[11]);
PACK32(&sub_block[48], &w[12]); PACK32(&sub_block[52], &w[13]);
PACK32(&sub_block[56], &w[14]); PACK32(&sub_block[60], &w[15]);
SHA256_SCR(16); SHA256_SCR(17); SHA256_SCR(18); SHA256_SCR(19);
SHA256_SCR(20); SHA256_SCR(21); SHA256_SCR(22); SHA256_SCR(23);
SHA256_SCR(24); SHA256_SCR(25); SHA256_SCR(26); SHA256_SCR(27);
SHA256_SCR(28); SHA256_SCR(29); SHA256_SCR(30); SHA256_SCR(31);
SHA256_SCR(32); SHA256_SCR(33); SHA256_SCR(34); SHA256_SCR(35);
SHA256_SCR(36); SHA256_SCR(37); SHA256_SCR(38); SHA256_SCR(39);
SHA256_SCR(40); SHA256_SCR(41); SHA256_SCR(42); SHA256_SCR(43);
SHA256_SCR(44); SHA256_SCR(45); SHA256_SCR(46); SHA256_SCR(47);
SHA256_SCR(48); SHA256_SCR(49); SHA256_SCR(50); SHA256_SCR(51);
SHA256_SCR(52); SHA256_SCR(53); SHA256_SCR(54); SHA256_SCR(55);
SHA256_SCR(56); SHA256_SCR(57); SHA256_SCR(58); SHA256_SCR(59);
SHA256_SCR(60); SHA256_SCR(61); SHA256_SCR(62); SHA256_SCR(63);
wv[0] = ctx->h[0]; wv[1] = ctx->h[1];
wv[2] = ctx->h[2]; wv[3] = ctx->h[3];
wv[4] = ctx->h[4]; wv[5] = ctx->h[5];
wv[6] = ctx->h[6]; wv[7] = ctx->h[7];
SHA256_EXP(0,1,2,3,4,5,6,7, 0); SHA256_EXP(7,0,1,2,3,4,5,6, 1);
SHA256_EXP(6,7,0,1,2,3,4,5, 2); SHA256_EXP(5,6,7,0,1,2,3,4, 3);
SHA256_EXP(4,5,6,7,0,1,2,3, 4); SHA256_EXP(3,4,5,6,7,0,1,2, 5);
SHA256_EXP(2,3,4,5,6,7,0,1, 6); SHA256_EXP(1,2,3,4,5,6,7,0, 7);
SHA256_EXP(0,1,2,3,4,5,6,7, 8); SHA256_EXP(7,0,1,2,3,4,5,6, 9);
SHA256_EXP(6,7,0,1,2,3,4,5,10); SHA256_EXP(5,6,7,0,1,2,3,4,11);
SHA256_EXP(4,5,6,7,0,1,2,3,12); SHA256_EXP(3,4,5,6,7,0,1,2,13);
SHA256_EXP(2,3,4,5,6,7,0,1,14); SHA256_EXP(1,2,3,4,5,6,7,0,15);
SHA256_EXP(0,1,2,3,4,5,6,7,16); SHA256_EXP(7,0,1,2,3,4,5,6,17);
SHA256_EXP(6,7,0,1,2,3,4,5,18); SHA256_EXP(5,6,7,0,1,2,3,4,19);
SHA256_EXP(4,5,6,7,0,1,2,3,20); SHA256_EXP(3,4,5,6,7,0,1,2,21);
SHA256_EXP(2,3,4,5,6,7,0,1,22); SHA256_EXP(1,2,3,4,5,6,7,0,23);
SHA256_EXP(0,1,2,3,4,5,6,7,24); SHA256_EXP(7,0,1,2,3,4,5,6,25);
SHA256_EXP(6,7,0,1,2,3,4,5,26); SHA256_EXP(5,6,7,0,1,2,3,4,27);
SHA256_EXP(4,5,6,7,0,1,2,3,28); SHA256_EXP(3,4,5,6,7,0,1,2,29);
SHA256_EXP(2,3,4,5,6,7,0,1,30); SHA256_EXP(1,2,3,4,5,6,7,0,31);
SHA256_EXP(0,1,2,3,4,5,6,7,32); SHA256_EXP(7,0,1,2,3,4,5,6,33);
SHA256_EXP(6,7,0,1,2,3,4,5,34); SHA256_EXP(5,6,7,0,1,2,3,4,35);
SHA256_EXP(4,5,6,7,0,1,2,3,36); SHA256_EXP(3,4,5,6,7,0,1,2,37);
SHA256_EXP(2,3,4,5,6,7,0,1,38); SHA256_EXP(1,2,3,4,5,6,7,0,39);
SHA256_EXP(0,1,2,3,4,5,6,7,40); SHA256_EXP(7,0,1,2,3,4,5,6,41);
SHA256_EXP(6,7,0,1,2,3,4,5,42); SHA256_EXP(5,6,7,0,1,2,3,4,43);
SHA256_EXP(4,5,6,7,0,1,2,3,44); SHA256_EXP(3,4,5,6,7,0,1,2,45);
SHA256_EXP(2,3,4,5,6,7,0,1,46); SHA256_EXP(1,2,3,4,5,6,7,0,47);
SHA256_EXP(0,1,2,3,4,5,6,7,48); SHA256_EXP(7,0,1,2,3,4,5,6,49);
SHA256_EXP(6,7,0,1,2,3,4,5,50); SHA256_EXP(5,6,7,0,1,2,3,4,51);
SHA256_EXP(4,5,6,7,0,1,2,3,52); SHA256_EXP(3,4,5,6,7,0,1,2,53);
SHA256_EXP(2,3,4,5,6,7,0,1,54); SHA256_EXP(1,2,3,4,5,6,7,0,55);
SHA256_EXP(0,1,2,3,4,5,6,7,56); SHA256_EXP(7,0,1,2,3,4,5,6,57);
SHA256_EXP(6,7,0,1,2,3,4,5,58); SHA256_EXP(5,6,7,0,1,2,3,4,59);
SHA256_EXP(4,5,6,7,0,1,2,3,60); SHA256_EXP(3,4,5,6,7,0,1,2,61);
SHA256_EXP(2,3,4,5,6,7,0,1,62); SHA256_EXP(1,2,3,4,5,6,7,0,63);
ctx->h[0] += wv[0]; ctx->h[1] += wv[1];
ctx->h[2] += wv[2]; ctx->h[3] += wv[3];
ctx->h[4] += wv[4]; ctx->h[5] += wv[5];
ctx->h[6] += wv[6]; ctx->h[7] += wv[7];
#endif /* !UNROLL_LOOPS */
}
}
void SHA256_update(VB_SHA256_CTX* ctx, const uint8_t* data, uint32_t len) {
unsigned int block_nb;
unsigned int new_len, rem_len, tmp_len;
const uint8_t *shifted_data;
tmp_len = SHA256_BLOCK_SIZE - ctx->len;
rem_len = len < tmp_len ? len : tmp_len;
Memcpy(&ctx->block[ctx->len], data, rem_len);
if (ctx->len + len < SHA256_BLOCK_SIZE) {
ctx->len += len;
return;
}
new_len = len - rem_len;
block_nb = new_len / SHA256_BLOCK_SIZE;
shifted_data = data + rem_len;
SHA256_transform(ctx, ctx->block, 1);
SHA256_transform(ctx, shifted_data, block_nb);
rem_len = new_len % SHA256_BLOCK_SIZE;
Memcpy(ctx->block, &shifted_data[block_nb << 6],
rem_len);
ctx->len = rem_len;
ctx->tot_len += (block_nb + 1) << 6;
}
uint8_t* SHA256_final(VB_SHA256_CTX* ctx) {
unsigned int block_nb;
unsigned int pm_len;
unsigned int len_b;
#ifndef UNROLL_LOOPS
int i;
#endif
block_nb = (1 + ((SHA256_BLOCK_SIZE - 9)
< (ctx->len % SHA256_BLOCK_SIZE)));
len_b = (ctx->tot_len + ctx->len) << 3;
pm_len = block_nb << 6;
Memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
ctx->block[ctx->len] = 0x80;
UNPACK32(len_b, ctx->block + pm_len - 4);
SHA256_transform(ctx, ctx->block, block_nb);
#ifndef UNROLL_LOOPS
for (i = 0 ; i < 8; i++) {
UNPACK32(ctx->h[i], &ctx->buf[i << 2]);
}
#else
UNPACK32(ctx->h[0], &ctx->buf[ 0]);
UNPACK32(ctx->h[1], &ctx->buf[ 4]);
UNPACK32(ctx->h[2], &ctx->buf[ 8]);
UNPACK32(ctx->h[3], &ctx->buf[12]);
UNPACK32(ctx->h[4], &ctx->buf[16]);
UNPACK32(ctx->h[5], &ctx->buf[20]);
UNPACK32(ctx->h[6], &ctx->buf[24]);
UNPACK32(ctx->h[7], &ctx->buf[28]);
#endif /* !UNROLL_LOOPS */
return ctx->buf;
}
uint8_t* internal_SHA256(const uint8_t* data, uint64_t len, uint8_t* digest) {
const uint8_t* input_ptr;
const uint8_t* result;
uint64_t remaining_len;
int i;
VB_SHA256_CTX ctx;
SHA256_init(&ctx);
input_ptr = data;
remaining_len = len;
/* Process data in at most UINT32_MAX byte chunks at a time. */
while (remaining_len) {
uint32_t block_size;
block_size = (uint32_t) ((remaining_len >= UINT32_MAX) ?
UINT32_MAX : remaining_len);
SHA256_update(&ctx, input_ptr, block_size);
remaining_len -= block_size;
input_ptr += block_size;
}
result = SHA256_final(&ctx);
for (i = 0; i < SHA256_DIGEST_SIZE; ++i) {
digest[i] = *result++;
}
return digest;
}
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