Inital (naive) SHA-256 implementation.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@17071 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
233
lib/des/sha256.c
Normal file
233
lib/des/sha256.c
Normal file
@@ -0,0 +1,233 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 1995 - 2001, 2006 Kungliga Tekniska H<>gskolan
|
||||||
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
||||||
|
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifdef HAVE_CONFIG_H
|
||||||
|
#include "config.h"
|
||||||
|
|
||||||
|
RCSID("$Id$");
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include "hash.h"
|
||||||
|
#include "sha.h"
|
||||||
|
|
||||||
|
#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
|
||||||
|
#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
|
||||||
|
|
||||||
|
#define ROTR(x,n) (((x)>>(n)) | ((x) << (32 - (n))))
|
||||||
|
|
||||||
|
#define Sigma0(x) (ROTR(x,2) ^ ROTR(x,13) ^ ROTR(x,22))
|
||||||
|
#define Sigma1(x) (ROTR(x,6) ^ ROTR(x,11) ^ ROTR(x,25))
|
||||||
|
#define sigma0(x) (ROTR(x,7) ^ ROTR(x,18) ^ ((x)>>3))
|
||||||
|
#define sigma1(x) (ROTR(x,17) ^ ROTR(x,19) ^ ((x)>>10))
|
||||||
|
|
||||||
|
#define A m->counter[0]
|
||||||
|
#define B m->counter[1]
|
||||||
|
#define C m->counter[2]
|
||||||
|
#define D m->counter[3]
|
||||||
|
#define E m->counter[4]
|
||||||
|
#define F m->counter[5]
|
||||||
|
#define G m->counter[6]
|
||||||
|
#define H m->counter[7]
|
||||||
|
|
||||||
|
static const u_int32_t constant_256[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
|
||||||
|
};
|
||||||
|
|
||||||
|
void
|
||||||
|
SHA256_Init (SHA256_CTX *m)
|
||||||
|
{
|
||||||
|
m->sz[0] = 0;
|
||||||
|
m->sz[1] = 0;
|
||||||
|
A = 0x6a09e667;
|
||||||
|
B = 0xbb67ae85;
|
||||||
|
C = 0x3c6ef372;
|
||||||
|
D = 0xa54ff53a;
|
||||||
|
E = 0x510e527f;
|
||||||
|
F = 0x9b05688c;
|
||||||
|
G = 0x1f83d9ab;
|
||||||
|
H = 0x5be0cd19;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
calc (SHA256_CTX *m, u_int32_t *in)
|
||||||
|
{
|
||||||
|
u_int32_t AA, BB, CC, DD, EE, FF, GG, HH;
|
||||||
|
u_int32_t data[64];
|
||||||
|
int i;
|
||||||
|
|
||||||
|
AA = A;
|
||||||
|
BB = B;
|
||||||
|
CC = C;
|
||||||
|
DD = D;
|
||||||
|
EE = E;
|
||||||
|
FF = F;
|
||||||
|
GG = G;
|
||||||
|
HH = H;
|
||||||
|
|
||||||
|
for (i = 0; i < 16; ++i)
|
||||||
|
data[i] = in[i];
|
||||||
|
for (i = 16; i < 64; ++i)
|
||||||
|
data[i] = sigma1(data[i-2]) + data[i-7] +
|
||||||
|
sigma0(data[i-15]) + data[i - 16];
|
||||||
|
|
||||||
|
for (i = 0; i < 64; i++) {
|
||||||
|
u_int32_t T1, T2;
|
||||||
|
|
||||||
|
T1 = HH + Sigma1(EE) + Ch(EE, FF, GG) + constant_256[i] + data[i];
|
||||||
|
T2 = Sigma0(AA) + Maj(AA,BB,CC);
|
||||||
|
|
||||||
|
HH = GG;
|
||||||
|
GG = FF;
|
||||||
|
FF = EE;
|
||||||
|
EE = DD + T1;
|
||||||
|
DD = CC;
|
||||||
|
CC = BB;
|
||||||
|
BB = AA;
|
||||||
|
AA = T1 + T2;
|
||||||
|
}
|
||||||
|
|
||||||
|
A += AA;
|
||||||
|
B += BB;
|
||||||
|
C += CC;
|
||||||
|
D += DD;
|
||||||
|
E += EE;
|
||||||
|
F += FF;
|
||||||
|
G += GG;
|
||||||
|
H += HH;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* From `Performance analysis of MD5' by Joseph D. Touch <touch@isi.edu>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#if !defined(WORDS_BIGENDIAN) || defined(_CRAY)
|
||||||
|
static inline u_int32_t
|
||||||
|
swap_u_int32_t (u_int32_t t)
|
||||||
|
{
|
||||||
|
#define ROL(x,n) ((x)<<(n))|((x)>>(32-(n)))
|
||||||
|
u_int32_t temp1, temp2;
|
||||||
|
|
||||||
|
temp1 = cshift(t, 16);
|
||||||
|
temp2 = temp1 >> 8;
|
||||||
|
temp1 &= 0x00ff00ff;
|
||||||
|
temp2 &= 0x00ff00ff;
|
||||||
|
temp1 <<= 8;
|
||||||
|
return temp1 | temp2;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
struct x32{
|
||||||
|
unsigned int a:32;
|
||||||
|
unsigned int b:32;
|
||||||
|
};
|
||||||
|
|
||||||
|
void
|
||||||
|
SHA256_Update (SHA256_CTX *m, const void *v, size_t len)
|
||||||
|
{
|
||||||
|
const unsigned char *p = v;
|
||||||
|
size_t old_sz = m->sz[0];
|
||||||
|
size_t offset;
|
||||||
|
|
||||||
|
m->sz[0] += len * 8;
|
||||||
|
if (m->sz[0] < old_sz)
|
||||||
|
++m->sz[1];
|
||||||
|
offset = (old_sz / 8) % 64;
|
||||||
|
while(len > 0){
|
||||||
|
size_t l = min(len, 64 - offset);
|
||||||
|
memcpy(m->save + offset, p, l);
|
||||||
|
offset += l;
|
||||||
|
p += l;
|
||||||
|
len -= l;
|
||||||
|
if(offset == 64){
|
||||||
|
#if !defined(WORDS_BIGENDIAN) || defined(_CRAY)
|
||||||
|
int i;
|
||||||
|
u_int32_t current[16];
|
||||||
|
struct x32 *u = (struct x32*)m->save;
|
||||||
|
for(i = 0; i < 8; i++){
|
||||||
|
current[2*i+0] = swap_u_int32_t(u[i].a);
|
||||||
|
current[2*i+1] = swap_u_int32_t(u[i].b);
|
||||||
|
}
|
||||||
|
calc(m, current);
|
||||||
|
#else
|
||||||
|
calc(m, (u_int32_t*)m->save);
|
||||||
|
#endif
|
||||||
|
offset = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
SHA256_Final (void *res, SHA256_CTX *m)
|
||||||
|
{
|
||||||
|
unsigned char zeros[72];
|
||||||
|
unsigned offset = (m->sz[0] / 8) % 64;
|
||||||
|
unsigned int dstart = (120 - offset - 1) % 64 + 1;
|
||||||
|
|
||||||
|
*zeros = 0x80;
|
||||||
|
memset (zeros + 1, 0, sizeof(zeros) - 1);
|
||||||
|
zeros[dstart+7] = (m->sz[0] >> 0) & 0xff;
|
||||||
|
zeros[dstart+6] = (m->sz[0] >> 8) & 0xff;
|
||||||
|
zeros[dstart+5] = (m->sz[0] >> 16) & 0xff;
|
||||||
|
zeros[dstart+4] = (m->sz[0] >> 24) & 0xff;
|
||||||
|
zeros[dstart+3] = (m->sz[1] >> 0) & 0xff;
|
||||||
|
zeros[dstart+2] = (m->sz[1] >> 8) & 0xff;
|
||||||
|
zeros[dstart+1] = (m->sz[1] >> 16) & 0xff;
|
||||||
|
zeros[dstart+0] = (m->sz[1] >> 24) & 0xff;
|
||||||
|
SHA256_Update (m, zeros, dstart + 8);
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
unsigned char *r = (unsigned char*)res;
|
||||||
|
|
||||||
|
for (i = 0; i < 8; ++i) {
|
||||||
|
r[4*i+3] = m->counter[i] & 0xFF;
|
||||||
|
r[4*i+2] = (m->counter[i] >> 8) & 0xFF;
|
||||||
|
r[4*i+1] = (m->counter[i] >> 16) & 0xFF;
|
||||||
|
r[4*i] = (m->counter[i] >> 24) & 0xFF;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user