#include "tomcrypt.h"
#ifdef SHA1
const
struct
ltc_hash_descriptor sha1_desc =
{
"sha1"
,
2,
20,
64,
{ 1, 3, 14, 3, 2, 26, },
6,
&sha1_init,
&sha1_process,
&sha1_done,
&sha1_test,
NULL
};
#define F0(x,y,z) (z ^ (x & (y ^ z)))
#define F1(x,y,z) (x ^ y ^ z)
#define F2(x,y,z) ((x & y) | (z & (x | y)))
#define F3(x,y,z) (x ^ y ^ z)
#ifdef LTC_CLEAN_STACK
static
int
_sha1_compress(hash_state *md, unsigned
char
*buf)
#else
static
int
sha1_compress(hash_state *md, unsigned
char
*buf)
#endif
{
ulong32 a,b,c,d,e,W[80],i;
#ifdef LTC_SMALL_CODE
ulong32 t;
#endif
for
(i = 0; i < 16; i++) {
LOAD32H(W[i], buf + (4*i));
}
a = md->sha1.state[0];
b = md->sha1.state[1];
c = md->sha1.state[2];
d = md->sha1.state[3];
e = md->sha1.state[4];
for
(i = 16; i < 80; i++) {
W[i] = ROL(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
}
#define FF0(a,b,c,d,e,i) e = (ROLc(a, 5) + F0(b,c,d) + e + W[i] + 0x5a827999UL); b = ROLc(b, 30);
#define FF1(a,b,c,d,e,i) e = (ROLc(a, 5) + F1(b,c,d) + e + W[i] + 0x6ed9eba1UL); b = ROLc(b, 30);
#define FF2(a,b,c,d,e,i) e = (ROLc(a, 5) + F2(b,c,d) + e + W[i] + 0x8f1bbcdcUL); b = ROLc(b, 30);
#define FF3(a,b,c,d,e,i) e = (ROLc(a, 5) + F3(b,c,d) + e + W[i] + 0xca62c1d6UL); b = ROLc(b, 30);
#ifdef LTC_SMALL_CODE
for
(i = 0; i < 20; ) {
FF0(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
}
for
(; i < 40; ) {
FF1(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
}
for
(; i < 60; ) {
FF2(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
}
for
(; i < 80; ) {
FF3(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
}
#else
for
(i = 0; i < 20; ) {
FF0(a,b,c,d,e,i++);
FF0(e,a,b,c,d,i++);
FF0(d,e,a,b,c,i++);
FF0(c,d,e,a,b,i++);
FF0(b,c,d,e,a,i++);
}
for
(; i < 40; ) {
FF1(a,b,c,d,e,i++);
FF1(e,a,b,c,d,i++);
FF1(d,e,a,b,c,i++);
FF1(c,d,e,a,b,i++);
FF1(b,c,d,e,a,i++);
}
for
(; i < 60; ) {
FF2(a,b,c,d,e,i++);
FF2(e,a,b,c,d,i++);
FF2(d,e,a,b,c,i++);
FF2(c,d,e,a,b,i++);
FF2(b,c,d,e,a,i++);
}
for
(; i < 80; ) {
FF3(a,b,c,d,e,i++);
FF3(e,a,b,c,d,i++);
FF3(d,e,a,b,c,i++);
FF3(c,d,e,a,b,i++);
FF3(b,c,d,e,a,i++);
}
#endif
#undef FF0
#undef FF1
#undef FF2
#undef FF3
md->sha1.state[0] = md->sha1.state[0] + a;
md->sha1.state[1] = md->sha1.state[1] + b;
md->sha1.state[2] = md->sha1.state[2] + c;
md->sha1.state[3] = md->sha1.state[3] + d;
md->sha1.state[4] = md->sha1.state[4] + e;
return
CRYPT_OK;
}
#ifdef LTC_CLEAN_STACK
static
int
sha1_compress(hash_state *md, unsigned
char
*buf)
{
int
err;
err = _sha1_compress(md, buf);
burn_stack(
sizeof
(ulong32) * 87);
return
err;
}
#endif
int
sha1_init(hash_state * md)
{
LTC_ARGCHK(md != NULL);
md->sha1.state[0] = 0x67452301UL;
md->sha1.state[1] = 0xefcdab89UL;
md->sha1.state[2] = 0x98badcfeUL;
md->sha1.state[3] = 0x10325476UL;
md->sha1.state[4] = 0xc3d2e1f0UL;
md->sha1.curlen = 0;
md->sha1.length = 0;
return
CRYPT_OK;
}
HASH_PROCESS(sha1_process, sha1_compress, sha1, 64)
int
sha1_done(hash_state * md, unsigned
char
*out)
{
int
i;
LTC_ARGCHK(md != NULL);
LTC_ARGCHK(out != NULL);
if
(md->sha1.curlen >=
sizeof
(md->sha1.buf)) {
return
CRYPT_INVALID_ARG;
}
md->sha1.length += md->sha1.curlen * 8;
md->sha1.buf[md->sha1.curlen++] = (unsigned
char
)0x80;
if
(md->sha1.curlen > 56) {
while
(md->sha1.curlen < 64) {
md->sha1.buf[md->sha1.curlen++] = (unsigned
char
)0;
}
sha1_compress(md, md->sha1.buf);
md->sha1.curlen = 0;
}
while
(md->sha1.curlen < 56) {
md->sha1.buf[md->sha1.curlen++] = (unsigned
char
)0;
}
STORE64H(md->sha1.length, md->sha1.buf+56);
sha1_compress(md, md->sha1.buf);
for
(i = 0; i < 5; i++) {
STORE32H(md->sha1.state[i], out+(4*i));
}
#ifdef LTC_CLEAN_STACK
zeromem(md,
sizeof
(hash_state));
#endif
return
CRYPT_OK;
}
int
sha1_test(
void
)
{
#ifndef LTC_TEST
return
CRYPT_NOP;
#else
static
const
struct
{
char
*msg;
unsigned
char
hash[20];
} tests[] = {
{
"abc"
,
{ 0xa9, 0x99, 0x3e, 0x36, 0x47, 0x06, 0x81, 0x6a,
0xba, 0x3e, 0x25, 0x71, 0x78, 0x50, 0xc2, 0x6c,
0x9c, 0xd0, 0xd8, 0x9d }
},
{
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
,
{ 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E,
0xBA, 0xAE, 0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5,
0xE5, 0x46, 0x70, 0xF1 }
}
};
int
i;
unsigned
char
tmp[20];
hash_state md;
for
(i = 0; i < (
int
)(
sizeof
(tests) /
sizeof
(tests[0])); i++) {
sha1_init(&md);
sha1_process(&md, (unsigned
char
*)tests[i].msg, (unsigned
long
)
strlen
(tests[i].msg));
sha1_done(&md, tmp);
if
(XMEMCMP(tmp, tests[i].hash, 20) != 0) {
return
CRYPT_FAIL_TESTVECTOR;
}
}
return
CRYPT_OK;
#endif
}
#endif