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mbedtls/library/sha1.c
Dave Rodgman e3c05853d6 Header updates 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
2023-11-03 12:21:36 +00:00

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/*
* FIPS-180-1 compliant SHA-1 implementation
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
/*
* The SHA-1 standard was published by NIST in 1993.
*
* http://www.itl.nist.gov/fipspubs/fip180-1.htm
*/
#include "common.h"
#if defined(MBEDTLS_SHA1_C)
#include "mbedtls/sha1.h"
#include "mbedtls/platform_util.h"
#include "mbedtls/error.h"
#include <string.h>
#include "mbedtls/platform.h"
#if !defined(MBEDTLS_SHA1_ALT)
void mbedtls_sha1_init(mbedtls_sha1_context *ctx)
{
memset(ctx, 0, sizeof(mbedtls_sha1_context));
}
void mbedtls_sha1_free(mbedtls_sha1_context *ctx)
{
if (ctx == NULL) {
return;
}
mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha1_context));
}
void mbedtls_sha1_clone(mbedtls_sha1_context *dst,
const mbedtls_sha1_context *src)
{
*dst = *src;
}
/*
* SHA-1 context setup
*/
int mbedtls_sha1_starts(mbedtls_sha1_context *ctx)
{
ctx->total[0] = 0;
ctx->total[1] = 0;
ctx->state[0] = 0x67452301;
ctx->state[1] = 0xEFCDAB89;
ctx->state[2] = 0x98BADCFE;
ctx->state[3] = 0x10325476;
ctx->state[4] = 0xC3D2E1F0;
return 0;
}
#if !defined(MBEDTLS_SHA1_PROCESS_ALT)
int mbedtls_internal_sha1_process(mbedtls_sha1_context *ctx,
const unsigned char data[64])
{
struct {
uint32_t temp, W[16], A, B, C, D, E;
} local;
local.W[0] = MBEDTLS_GET_UINT32_BE(data, 0);
local.W[1] = MBEDTLS_GET_UINT32_BE(data, 4);
local.W[2] = MBEDTLS_GET_UINT32_BE(data, 8);
local.W[3] = MBEDTLS_GET_UINT32_BE(data, 12);
local.W[4] = MBEDTLS_GET_UINT32_BE(data, 16);
local.W[5] = MBEDTLS_GET_UINT32_BE(data, 20);
local.W[6] = MBEDTLS_GET_UINT32_BE(data, 24);
local.W[7] = MBEDTLS_GET_UINT32_BE(data, 28);
local.W[8] = MBEDTLS_GET_UINT32_BE(data, 32);
local.W[9] = MBEDTLS_GET_UINT32_BE(data, 36);
local.W[10] = MBEDTLS_GET_UINT32_BE(data, 40);
local.W[11] = MBEDTLS_GET_UINT32_BE(data, 44);
local.W[12] = MBEDTLS_GET_UINT32_BE(data, 48);
local.W[13] = MBEDTLS_GET_UINT32_BE(data, 52);
local.W[14] = MBEDTLS_GET_UINT32_BE(data, 56);
local.W[15] = MBEDTLS_GET_UINT32_BE(data, 60);
#define S(x, n) (((x) << (n)) | (((x) & 0xFFFFFFFF) >> (32 - (n))))
#define R(t) \
( \
local.temp = local.W[((t) - 3) & 0x0F] ^ \
local.W[((t) - 8) & 0x0F] ^ \
local.W[((t) - 14) & 0x0F] ^ \
local.W[(t) & 0x0F], \
(local.W[(t) & 0x0F] = S(local.temp, 1)) \
)
#define P(a, b, c, d, e, x) \
do \
{ \
(e) += S((a), 5) + F((b), (c), (d)) + K + (x); \
(b) = S((b), 30); \
} while (0)
local.A = ctx->state[0];
local.B = ctx->state[1];
local.C = ctx->state[2];
local.D = ctx->state[3];
local.E = ctx->state[4];
#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
#define K 0x5A827999
P(local.A, local.B, local.C, local.D, local.E, local.W[0]);
P(local.E, local.A, local.B, local.C, local.D, local.W[1]);
P(local.D, local.E, local.A, local.B, local.C, local.W[2]);
P(local.C, local.D, local.E, local.A, local.B, local.W[3]);
P(local.B, local.C, local.D, local.E, local.A, local.W[4]);
P(local.A, local.B, local.C, local.D, local.E, local.W[5]);
P(local.E, local.A, local.B, local.C, local.D, local.W[6]);
P(local.D, local.E, local.A, local.B, local.C, local.W[7]);
P(local.C, local.D, local.E, local.A, local.B, local.W[8]);
P(local.B, local.C, local.D, local.E, local.A, local.W[9]);
P(local.A, local.B, local.C, local.D, local.E, local.W[10]);
P(local.E, local.A, local.B, local.C, local.D, local.W[11]);
P(local.D, local.E, local.A, local.B, local.C, local.W[12]);
P(local.C, local.D, local.E, local.A, local.B, local.W[13]);
P(local.B, local.C, local.D, local.E, local.A, local.W[14]);
P(local.A, local.B, local.C, local.D, local.E, local.W[15]);
P(local.E, local.A, local.B, local.C, local.D, R(16));
P(local.D, local.E, local.A, local.B, local.C, R(17));
P(local.C, local.D, local.E, local.A, local.B, R(18));
P(local.B, local.C, local.D, local.E, local.A, R(19));
#undef K
#undef F
#define F(x, y, z) ((x) ^ (y) ^ (z))
#define K 0x6ED9EBA1
P(local.A, local.B, local.C, local.D, local.E, R(20));
P(local.E, local.A, local.B, local.C, local.D, R(21));
P(local.D, local.E, local.A, local.B, local.C, R(22));
P(local.C, local.D, local.E, local.A, local.B, R(23));
P(local.B, local.C, local.D, local.E, local.A, R(24));
P(local.A, local.B, local.C, local.D, local.E, R(25));
P(local.E, local.A, local.B, local.C, local.D, R(26));
P(local.D, local.E, local.A, local.B, local.C, R(27));
P(local.C, local.D, local.E, local.A, local.B, R(28));
P(local.B, local.C, local.D, local.E, local.A, R(29));
P(local.A, local.B, local.C, local.D, local.E, R(30));
P(local.E, local.A, local.B, local.C, local.D, R(31));
P(local.D, local.E, local.A, local.B, local.C, R(32));
P(local.C, local.D, local.E, local.A, local.B, R(33));
P(local.B, local.C, local.D, local.E, local.A, R(34));
P(local.A, local.B, local.C, local.D, local.E, R(35));
P(local.E, local.A, local.B, local.C, local.D, R(36));
P(local.D, local.E, local.A, local.B, local.C, R(37));
P(local.C, local.D, local.E, local.A, local.B, R(38));
P(local.B, local.C, local.D, local.E, local.A, R(39));
#undef K
#undef F
#define F(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
#define K 0x8F1BBCDC
P(local.A, local.B, local.C, local.D, local.E, R(40));
P(local.E, local.A, local.B, local.C, local.D, R(41));
P(local.D, local.E, local.A, local.B, local.C, R(42));
P(local.C, local.D, local.E, local.A, local.B, R(43));
P(local.B, local.C, local.D, local.E, local.A, R(44));
P(local.A, local.B, local.C, local.D, local.E, R(45));
P(local.E, local.A, local.B, local.C, local.D, R(46));
P(local.D, local.E, local.A, local.B, local.C, R(47));
P(local.C, local.D, local.E, local.A, local.B, R(48));
P(local.B, local.C, local.D, local.E, local.A, R(49));
P(local.A, local.B, local.C, local.D, local.E, R(50));
P(local.E, local.A, local.B, local.C, local.D, R(51));
P(local.D, local.E, local.A, local.B, local.C, R(52));
P(local.C, local.D, local.E, local.A, local.B, R(53));
P(local.B, local.C, local.D, local.E, local.A, R(54));
P(local.A, local.B, local.C, local.D, local.E, R(55));
P(local.E, local.A, local.B, local.C, local.D, R(56));
P(local.D, local.E, local.A, local.B, local.C, R(57));
P(local.C, local.D, local.E, local.A, local.B, R(58));
P(local.B, local.C, local.D, local.E, local.A, R(59));
#undef K
#undef F
#define F(x, y, z) ((x) ^ (y) ^ (z))
#define K 0xCA62C1D6
P(local.A, local.B, local.C, local.D, local.E, R(60));
P(local.E, local.A, local.B, local.C, local.D, R(61));
P(local.D, local.E, local.A, local.B, local.C, R(62));
P(local.C, local.D, local.E, local.A, local.B, R(63));
P(local.B, local.C, local.D, local.E, local.A, R(64));
P(local.A, local.B, local.C, local.D, local.E, R(65));
P(local.E, local.A, local.B, local.C, local.D, R(66));
P(local.D, local.E, local.A, local.B, local.C, R(67));
P(local.C, local.D, local.E, local.A, local.B, R(68));
P(local.B, local.C, local.D, local.E, local.A, R(69));
P(local.A, local.B, local.C, local.D, local.E, R(70));
P(local.E, local.A, local.B, local.C, local.D, R(71));
P(local.D, local.E, local.A, local.B, local.C, R(72));
P(local.C, local.D, local.E, local.A, local.B, R(73));
P(local.B, local.C, local.D, local.E, local.A, R(74));
P(local.A, local.B, local.C, local.D, local.E, R(75));
P(local.E, local.A, local.B, local.C, local.D, R(76));
P(local.D, local.E, local.A, local.B, local.C, R(77));
P(local.C, local.D, local.E, local.A, local.B, R(78));
P(local.B, local.C, local.D, local.E, local.A, R(79));
#undef K
#undef F
ctx->state[0] += local.A;
ctx->state[1] += local.B;
ctx->state[2] += local.C;
ctx->state[3] += local.D;
ctx->state[4] += local.E;
/* Zeroise buffers and variables to clear sensitive data from memory. */
mbedtls_platform_zeroize(&local, sizeof(local));
return 0;
}
#endif /* !MBEDTLS_SHA1_PROCESS_ALT */
/*
* SHA-1 process buffer
*/
int mbedtls_sha1_update(mbedtls_sha1_context *ctx,
const unsigned char *input,
size_t ilen)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t fill;
uint32_t left;
if (ilen == 0) {
return 0;
}
left = ctx->total[0] & 0x3F;
fill = 64 - left;
ctx->total[0] += (uint32_t) ilen;
ctx->total[0] &= 0xFFFFFFFF;
if (ctx->total[0] < (uint32_t) ilen) {
ctx->total[1]++;
}
if (left && ilen >= fill) {
memcpy((void *) (ctx->buffer + left), input, fill);
if ((ret = mbedtls_internal_sha1_process(ctx, ctx->buffer)) != 0) {
return ret;
}
input += fill;
ilen -= fill;
left = 0;
}
while (ilen >= 64) {
if ((ret = mbedtls_internal_sha1_process(ctx, input)) != 0) {
return ret;
}
input += 64;
ilen -= 64;
}
if (ilen > 0) {
memcpy((void *) (ctx->buffer + left), input, ilen);
}
return 0;
}
/*
* SHA-1 final digest
*/
int mbedtls_sha1_finish(mbedtls_sha1_context *ctx,
unsigned char output[20])
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
uint32_t used;
uint32_t high, low;
/*
* Add padding: 0x80 then 0x00 until 8 bytes remain for the length
*/
used = ctx->total[0] & 0x3F;
ctx->buffer[used++] = 0x80;
if (used <= 56) {
/* Enough room for padding + length in current block */
memset(ctx->buffer + used, 0, 56 - used);
} else {
/* We'll need an extra block */
memset(ctx->buffer + used, 0, 64 - used);
if ((ret = mbedtls_internal_sha1_process(ctx, ctx->buffer)) != 0) {
goto exit;
}
memset(ctx->buffer, 0, 56);
}
/*
* Add message length
*/
high = (ctx->total[0] >> 29)
| (ctx->total[1] << 3);
low = (ctx->total[0] << 3);
MBEDTLS_PUT_UINT32_BE(high, ctx->buffer, 56);
MBEDTLS_PUT_UINT32_BE(low, ctx->buffer, 60);
if ((ret = mbedtls_internal_sha1_process(ctx, ctx->buffer)) != 0) {
goto exit;
}
/*
* Output final state
*/
MBEDTLS_PUT_UINT32_BE(ctx->state[0], output, 0);
MBEDTLS_PUT_UINT32_BE(ctx->state[1], output, 4);
MBEDTLS_PUT_UINT32_BE(ctx->state[2], output, 8);
MBEDTLS_PUT_UINT32_BE(ctx->state[3], output, 12);
MBEDTLS_PUT_UINT32_BE(ctx->state[4], output, 16);
ret = 0;
exit:
mbedtls_sha1_free(ctx);
return ret;
}
#endif /* !MBEDTLS_SHA1_ALT */
/*
* output = SHA-1( input buffer )
*/
int mbedtls_sha1(const unsigned char *input,
size_t ilen,
unsigned char output[20])
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
mbedtls_sha1_context ctx;
mbedtls_sha1_init(&ctx);
if ((ret = mbedtls_sha1_starts(&ctx)) != 0) {
goto exit;
}
if ((ret = mbedtls_sha1_update(&ctx, input, ilen)) != 0) {
goto exit;
}
if ((ret = mbedtls_sha1_finish(&ctx, output)) != 0) {
goto exit;
}
exit:
mbedtls_sha1_free(&ctx);
return ret;
}
#if defined(MBEDTLS_SELF_TEST)
/*
* FIPS-180-1 test vectors
*/
static const unsigned char sha1_test_buf[3][57] =
{
{ "abc" },
{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
{ "" }
};
static const size_t sha1_test_buflen[3] =
{
3, 56, 1000
};
static const unsigned char sha1_test_sum[3][20] =
{
{ 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
{ 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
{ 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
};
/*
* Checkup routine
*/
int mbedtls_sha1_self_test(int verbose)
{
int i, j, buflen, ret = 0;
unsigned char buf[1024];
unsigned char sha1sum[20];
mbedtls_sha1_context ctx;
mbedtls_sha1_init(&ctx);
/*
* SHA-1
*/
for (i = 0; i < 3; i++) {
if (verbose != 0) {
mbedtls_printf(" SHA-1 test #%d: ", i + 1);
}
if ((ret = mbedtls_sha1_starts(&ctx)) != 0) {
goto fail;
}
if (i == 2) {
memset(buf, 'a', buflen = 1000);
for (j = 0; j < 1000; j++) {
ret = mbedtls_sha1_update(&ctx, buf, buflen);
if (ret != 0) {
goto fail;
}
}
} else {
ret = mbedtls_sha1_update(&ctx, sha1_test_buf[i],
sha1_test_buflen[i]);
if (ret != 0) {
goto fail;
}
}
if ((ret = mbedtls_sha1_finish(&ctx, sha1sum)) != 0) {
goto fail;
}
if (memcmp(sha1sum, sha1_test_sum[i], 20) != 0) {
ret = 1;
goto fail;
}
if (verbose != 0) {
mbedtls_printf("passed\n");
}
}
if (verbose != 0) {
mbedtls_printf("\n");
}
goto exit;
fail:
if (verbose != 0) {
mbedtls_printf("failed\n");
}
exit:
mbedtls_sha1_free(&ctx);
return ret;
}
#endif /* MBEDTLS_SELF_TEST */
#endif /* MBEDTLS_SHA1_C */
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