/*
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
* based on:
* FIPS-180-1 compliant SHA-1 implementation
*
* Copyright (C) 2003-2006 Christophe Devine
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License, version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
/*
* The SHA-1 standard was published by NIST in 1993.
*
* http://www.itl.nist.gov/fipspubs/fip180-1.htm
*/
#include <common.h>
#include <digest.h>
#include <init.h>
#include <linux/string.h>
#include <asm/byteorder.h>
#define SHA1_SUM_POS -0x20
#define SHA1_SUM_LEN 20
typedef struct
{
uint32_t total[2]; /*!< number of bytes processed */
uint32_t state[5]; /*!< intermediate digest state */
uint8_t buffer[64]; /*!< data block being processed */
}
sha1_context;
/*
* 32-bit integer manipulation macros (big endian)
*/
#define GET_UINT32_BE(n,b,i) (n) = be32_to_cpu(((uint32_t*)(b))[i / 4])
#define PUT_UINT32_BE(n,b,i) ((uint32_t*)(b))[i / 4] = cpu_to_be32(n)
/*
* SHA-1 context setup
*/
static void sha1_starts (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;
}
static void sha1_process (sha1_context * ctx, uint8_t data[64])
{
uint32_t temp, W[16], A, B, C, D, E;
GET_UINT32_BE (W[0], data, 0);
GET_UINT32_BE (W[1], data, 4);
GET_UINT32_BE (W[2], data, 8);
GET_UINT32_BE (W[3], data, 12);
GET_UINT32_BE (W[4], data, 16);
GET_UINT32_BE (W[5], data, 20);
GET_UINT32_BE (W[6], data, 24);
GET_UINT32_BE (W[7], data, 28);
GET_UINT32_BE (W[8], data, 32);
GET_UINT32_BE (W[9], data, 36);
GET_UINT32_BE (W[10], data, 40);
GET_UINT32_BE (W[11], data, 44);
GET_UINT32_BE (W[12], data, 48);
GET_UINT32_BE (W[13], data, 52);
GET_UINT32_BE (W[14], data, 56);
GET_UINT32_BE (W[15], data, 60);
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
#define R(t) ( \
temp = W[(t - 3) & 0x0F] ^ W[(t - 8) & 0x0F] ^ \
W[(t - 14) & 0x0F] ^ W[ t & 0x0F], \
( W[t & 0x0F] = S(temp,1) ) \
)
#define P(a,b,c,d,e,x) { \
e += S(a,5) + F(b,c,d) + K + x; b = S(b,30); \
}
A = ctx->state[0];
B = ctx->state[1];
C = ctx->state[2];
D = ctx->state[3];
E = ctx->state[4];
#define F(x,y,z) (z ^ (x & (y ^ z)))
#define K 0x5A827999
P (A, B, C, D, E, W[0]);
P (E, A, B, C, D, W[1]);
P (D, E, A, B, C, W[2]);
P (C, D, E, A, B, W[3]);
P (B, C, D, E, A, W[4]);
P (A, B, C, D, E, W[5]);
P (E, A, B, C, D, W[6]);
P (D, E, A, B, C, W[7]);
P (C, D, E, A, B, W[8]);
P (B, C, D, E, A, W[9]);
P (A, B, C, D, E, W[10]);
P (E, A, B, C, D, W[11]);
P (D, E, A, B, C, W[12]);
P (C, D, E, A, B, W[13]);
P (B, C, D, E, A, W[14]);
P (A, B, C, D, E, W[15]);
P (E, A, B, C, D, R (16));
P (D, E, A, B, C, R (17));
P (C, D, E, A, B, R (18));
P (B, C, D, E, A, R (19));
#undef K
#undef F
#define F(x,y,z) (x ^ y ^ z)
#define K 0x6ED9EBA1
P (A, B, C, D, E, R (20));
P (E, A, B, C, D, R (21));
P (D, E, A, B, C, R (22));
P (C, D, E, A, B, R (23));
P (B, C, D, E, A, R (24));
P (A, B, C, D, E, R (25));
P (E, A, B, C, D, R (26));
P (D, E, A, B, C, R (27));
P (C, D, E, A, B, R (28));
P (B, C, D, E, A, R (29));
P (A, B, C, D, E, R (30));
P (E, A, B, C, D, R (31));
P (D, E, A, B, C, R (32));
P (C, D, E, A, B, R (33));
P (B, C, D, E, A, R (34));
P (A, B, C, D, E, R (35));
P (E, A, B, C, D, R (36));
P (D, E, A, B, C, R (37));
P (C, D, E, A, B, R (38));
P (B, C, D, E, A, R (39));
#undef K
#undef F
#define F(x,y,z) ((x & y) | (z & (x | y)))
#define K 0x8F1BBCDC
P (A, B, C, D, E, R (40));
P (E, A, B, C, D, R (41));
P (D, E, A, B, C, R (42));
P (C, D, E, A, B, R (43));
P (B, C, D, E, A, R (44));
P (A, B, C, D, E, R (45));
P (E, A, B, C, D, R (46));
P (D, E, A, B, C, R (47));
P (C, D, E, A, B, R (48));
P (B, C, D, E, A, R (49));
P (A, B, C, D, E, R (50));
P (E, A, B, C, D, R (51));
P (D, E, A, B, C, R (52));
P (C, D, E, A, B, R (53));
P (B, C, D, E, A, R (54));
P (A, B, C, D, E, R (55));
P (E, A, B, C, D, R (56));
P (D, E, A, B, C, R (57));
P (C, D, E, A, B, R (58));
P (B, C, D, E, A, R (59));
#undef K
#undef F
#define F(x,y,z) (x ^ y ^ z)
#define K 0xCA62C1D6
P (A, B, C, D, E, R (60));
P (E, A, B, C, D, R (61));
P (D, E, A, B, C, R (62));
P (C, D, E, A, B, R (63));
P (B, C, D, E, A, R (64));
P (A, B, C, D, E, R (65));
P (E, A, B, C, D, R (66));
P (D, E, A, B, C, R (67));
P (C, D, E, A, B, R (68));
P (B, C, D, E, A, R (69));
P (A, B, C, D, E, R (70));
P (E, A, B, C, D, R (71));
P (D, E, A, B, C, R (72));
P (C, D, E, A, B, R (73));
P (B, C, D, E, A, R (74));
P (A, B, C, D, E, R (75));
P (E, A, B, C, D, R (76));
P (D, E, A, B, C, R (77));
P (C, D, E, A, B, R (78));
P (B, C, D, E, A, R (79));
#undef K
#undef F
ctx->state[0] += A;
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
ctx->state[4] += E;
}
/*
* SHA-1 process buffer
*/
static void sha1_update (sha1_context * ctx, uint8_t *input, uint32_t ilen)
{
uint32_t fill, left;
if (ilen <= 0)
return;
left = ctx->total[0] & 0x3F;
fill = 64 - left;
ctx->total[0] += ilen;
ctx->total[0] &= 0xFFFFFFFF;
if (ctx->total[0] < ilen)
ctx->total[1]++;
if (left && ilen >= fill) {
memcpy ((void *) (ctx->buffer + left), (void *) input, fill);
sha1_process (ctx, ctx->buffer);
input += fill;
ilen -= fill;
left = 0;
}
while (ilen >= 64) {
sha1_process (ctx, input);
input += 64;
ilen -= 64;
}
if (ilen > 0) {
memcpy ((void *) (ctx->buffer + left), (void *) input, ilen);
}
}
static uint8_t sha1_padding[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/*
* SHA-1 final digest
*/
static void sha1_finish (sha1_context * ctx, uint8_t output[20])
{
uint32_t last, padn;
uint32_t high, low;
uint8_t msglen[8];
high = (ctx->total[0] >> 29)
| (ctx->total[1] << 3);
low = (ctx->total[0] << 3);
PUT_UINT32_BE (high, msglen, 0);
PUT_UINT32_BE (low, msglen, 4);
last = ctx->total[0] & 0x3F;
padn = (last < 56) ? (56 - last) : (120 - last);
sha1_update (ctx, sha1_padding, padn);
sha1_update (ctx, msglen, 8);
PUT_UINT32_BE (ctx->state[0], output, 0);
PUT_UINT32_BE (ctx->state[1], output, 4);
PUT_UINT32_BE (ctx->state[2], output, 8);
PUT_UINT32_BE (ctx->state[3], output, 12);
PUT_UINT32_BE (ctx->state[4], output, 16);
}
/*
* Output = HMAC-SHA-1( input buffer, hmac key )
*/
void sha1_hmac (uint8_t *key, uint32_t keylen,
uint8_t *input, uint32_t ilen, uint8_t output[20])
{
uint32_t i;
sha1_context ctx;
uint8_t k_ipad[64];
uint8_t k_opad[64];
uint8_t tmpbuf[20];
memset (k_ipad, 0x36, 64);
memset (k_opad, 0x5C, 64);
for (i = 0; i < keylen; i++) {
if (i >= 64)
break;
k_ipad[i] ^= key[i];
k_opad[i] ^= key[i];
}
sha1_starts (&ctx);
sha1_update (&ctx, k_ipad, 64);
sha1_update (&ctx, input, ilen);
sha1_finish (&ctx, tmpbuf);
sha1_starts (&ctx);
sha1_update (&ctx, k_opad, 64);
sha1_update (&ctx, tmpbuf, 20);
sha1_finish (&ctx, output);
memset (k_ipad, 0, 64);
memset (k_opad, 0, 64);
memset (tmpbuf, 0, 20);
memset (&ctx, 0, sizeof (sha1_context));
}
struct sha1 {
sha1_context context;
struct digest d;
};
static int digest_sha1_init(struct digest *d)
{
struct sha1 *m = container_of(d, struct sha1, d);
sha1_starts(&m->context);
return 0;
}
static int digest_sha1_update(struct digest *d, const void *data,
unsigned long len)
{
struct sha1 *m = container_of(d, struct sha1, d);
sha1_update(&m->context, (uint8_t*)data, len);
return 0;
}
static int digest_sha1_final(struct digest *d, unsigned char *md)
{
struct sha1 *m = container_of(d, struct sha1, d);
sha1_finish(&m->context, md);
return 0;
}
static struct sha1 m = {
.d = {
.name = "sha1",
.init = digest_sha1_init,
.update = digest_sha1_update,
.final = digest_sha1_final,
.length = SHA1_SUM_LEN,
}
};
static int sha1_digest_register(void)
{
digest_register(&m.d);
return 0;
}
device_initcall(sha1_digest_register);
