297 lines
9.0 KiB
C
297 lines
9.0 KiB
C
/*
|
|
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
|
* 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.
|
|
*/
|
|
/*
|
|
* FIPS pub 180-1: Secure Hash Algorithm (SHA-1)
|
|
* based on: http://csrc.nist.gov/fips/fip180-1.txt
|
|
* implemented by Jun-ichiro itojun Itoh <itojun@itojun.org>
|
|
*/
|
|
|
|
#include "core/private.h"
|
|
|
|
#ifdef LWS_HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
struct sha1_ctxt {
|
|
union {
|
|
unsigned char b8[20];
|
|
unsigned int b32[5];
|
|
} h;
|
|
union {
|
|
unsigned char b8[8];
|
|
uint64_t b64[1];
|
|
} c;
|
|
union {
|
|
unsigned char b8[64];
|
|
unsigned int b32[16];
|
|
} m;
|
|
unsigned char count;
|
|
};
|
|
|
|
/* sanity check */
|
|
#if !defined(BYTE_ORDER) || !defined(LITTLE_ENDIAN) || !defined(BIG_ENDIAN)
|
|
# define unsupported 1
|
|
#elif BYTE_ORDER != BIG_ENDIAN
|
|
# if BYTE_ORDER != LITTLE_ENDIAN
|
|
# define unsupported 1
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef unsupported
|
|
|
|
/* constant table */
|
|
static const unsigned int _K[] =
|
|
{ 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6 };
|
|
#define K(t) _K[(t) / 20]
|
|
|
|
#define F0(b, c, d) (((b) & (c)) | ((~(b)) & (d)))
|
|
#define F1(b, c, d) (((b) ^ (c)) ^ (d))
|
|
#define F2(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d)))
|
|
#define F3(b, c, d) (((b) ^ (c)) ^ (d))
|
|
|
|
#define S(n, x) (((x) << (n)) | ((x) >> (32 - n)))
|
|
|
|
#define H(n) (ctxt->h.b32[(n)])
|
|
#define COUNT (ctxt->count)
|
|
#define BCOUNT (ctxt->c.b64[0] / 8)
|
|
#define W(n) (ctxt->m.b32[(n)])
|
|
|
|
#define PUTBYTE(x) { \
|
|
ctxt->m.b8[(COUNT % 64)] = (x); \
|
|
COUNT++; \
|
|
COUNT %= 64; \
|
|
ctxt->c.b64[0] += 8; \
|
|
if (COUNT % 64 == 0) \
|
|
sha1_step(ctxt); \
|
|
}
|
|
|
|
#define PUTPAD(x) { \
|
|
ctxt->m.b8[(COUNT % 64)] = (x); \
|
|
COUNT++; \
|
|
COUNT %= 64; \
|
|
if (COUNT % 64 == 0) \
|
|
sha1_step(ctxt); \
|
|
}
|
|
|
|
|
|
static void
|
|
sha1_step(struct sha1_ctxt *ctxt)
|
|
{
|
|
unsigned int a, b, c, d, e, tmp;
|
|
size_t t, s;
|
|
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
struct sha1_ctxt tctxt;
|
|
|
|
memcpy(&tctxt.m.b8[0], &ctxt->m.b8[0], 64);
|
|
ctxt->m.b8[0] = tctxt.m.b8[3]; ctxt->m.b8[1] = tctxt.m.b8[2];
|
|
ctxt->m.b8[2] = tctxt.m.b8[1]; ctxt->m.b8[3] = tctxt.m.b8[0];
|
|
ctxt->m.b8[4] = tctxt.m.b8[7]; ctxt->m.b8[5] = tctxt.m.b8[6];
|
|
ctxt->m.b8[6] = tctxt.m.b8[5]; ctxt->m.b8[7] = tctxt.m.b8[4];
|
|
ctxt->m.b8[8] = tctxt.m.b8[11]; ctxt->m.b8[9] = tctxt.m.b8[10];
|
|
ctxt->m.b8[10] = tctxt.m.b8[9]; ctxt->m.b8[11] = tctxt.m.b8[8];
|
|
ctxt->m.b8[12] = tctxt.m.b8[15]; ctxt->m.b8[13] = tctxt.m.b8[14];
|
|
ctxt->m.b8[14] = tctxt.m.b8[13]; ctxt->m.b8[15] = tctxt.m.b8[12];
|
|
ctxt->m.b8[16] = tctxt.m.b8[19]; ctxt->m.b8[17] = tctxt.m.b8[18];
|
|
ctxt->m.b8[18] = tctxt.m.b8[17]; ctxt->m.b8[19] = tctxt.m.b8[16];
|
|
ctxt->m.b8[20] = tctxt.m.b8[23]; ctxt->m.b8[21] = tctxt.m.b8[22];
|
|
ctxt->m.b8[22] = tctxt.m.b8[21]; ctxt->m.b8[23] = tctxt.m.b8[20];
|
|
ctxt->m.b8[24] = tctxt.m.b8[27]; ctxt->m.b8[25] = tctxt.m.b8[26];
|
|
ctxt->m.b8[26] = tctxt.m.b8[25]; ctxt->m.b8[27] = tctxt.m.b8[24];
|
|
ctxt->m.b8[28] = tctxt.m.b8[31]; ctxt->m.b8[29] = tctxt.m.b8[30];
|
|
ctxt->m.b8[30] = tctxt.m.b8[29]; ctxt->m.b8[31] = tctxt.m.b8[28];
|
|
ctxt->m.b8[32] = tctxt.m.b8[35]; ctxt->m.b8[33] = tctxt.m.b8[34];
|
|
ctxt->m.b8[34] = tctxt.m.b8[33]; ctxt->m.b8[35] = tctxt.m.b8[32];
|
|
ctxt->m.b8[36] = tctxt.m.b8[39]; ctxt->m.b8[37] = tctxt.m.b8[38];
|
|
ctxt->m.b8[38] = tctxt.m.b8[37]; ctxt->m.b8[39] = tctxt.m.b8[36];
|
|
ctxt->m.b8[40] = tctxt.m.b8[43]; ctxt->m.b8[41] = tctxt.m.b8[42];
|
|
ctxt->m.b8[42] = tctxt.m.b8[41]; ctxt->m.b8[43] = tctxt.m.b8[40];
|
|
ctxt->m.b8[44] = tctxt.m.b8[47]; ctxt->m.b8[45] = tctxt.m.b8[46];
|
|
ctxt->m.b8[46] = tctxt.m.b8[45]; ctxt->m.b8[47] = tctxt.m.b8[44];
|
|
ctxt->m.b8[48] = tctxt.m.b8[51]; ctxt->m.b8[49] = tctxt.m.b8[50];
|
|
ctxt->m.b8[50] = tctxt.m.b8[49]; ctxt->m.b8[51] = tctxt.m.b8[48];
|
|
ctxt->m.b8[52] = tctxt.m.b8[55]; ctxt->m.b8[53] = tctxt.m.b8[54];
|
|
ctxt->m.b8[54] = tctxt.m.b8[53]; ctxt->m.b8[55] = tctxt.m.b8[52];
|
|
ctxt->m.b8[56] = tctxt.m.b8[59]; ctxt->m.b8[57] = tctxt.m.b8[58];
|
|
ctxt->m.b8[58] = tctxt.m.b8[57]; ctxt->m.b8[59] = tctxt.m.b8[56];
|
|
ctxt->m.b8[60] = tctxt.m.b8[63]; ctxt->m.b8[61] = tctxt.m.b8[62];
|
|
ctxt->m.b8[62] = tctxt.m.b8[61]; ctxt->m.b8[63] = tctxt.m.b8[60];
|
|
#endif
|
|
|
|
a = H(0); b = H(1); c = H(2); d = H(3); e = H(4);
|
|
|
|
for (t = 0; t < 20; t++) {
|
|
s = t & 0x0f;
|
|
if (t >= 16)
|
|
W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^
|
|
W((s+2) & 0x0f) ^ W(s));
|
|
|
|
tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t);
|
|
e = d; d = c; c = S(30, b); b = a; a = tmp;
|
|
}
|
|
for (t = 20; t < 40; t++) {
|
|
s = t & 0x0f;
|
|
W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^
|
|
W((s+2) & 0x0f) ^ W(s));
|
|
tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t);
|
|
e = d; d = c; c = S(30, b); b = a; a = tmp;
|
|
}
|
|
for (t = 40; t < 60; t++) {
|
|
s = t & 0x0f;
|
|
W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^
|
|
W((s+2) & 0x0f) ^ W(s));
|
|
tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t);
|
|
e = d; d = c; c = S(30, b); b = a; a = tmp;
|
|
}
|
|
for (t = 60; t < 80; t++) {
|
|
s = t & 0x0f;
|
|
W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^
|
|
W((s+2) & 0x0f) ^ W(s));
|
|
tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t);
|
|
e = d; d = c; c = S(30, b); b = a; a = tmp;
|
|
}
|
|
|
|
H(0) = H(0) + a;
|
|
H(1) = H(1) + b;
|
|
H(2) = H(2) + c;
|
|
H(3) = H(3) + d;
|
|
H(4) = H(4) + e;
|
|
|
|
bzero(&ctxt->m.b8[0], 64);
|
|
}
|
|
|
|
/*------------------------------------------------------------*/
|
|
|
|
static void
|
|
_sha1_init(struct sha1_ctxt *ctxt)
|
|
{
|
|
bzero(ctxt, sizeof(struct sha1_ctxt));
|
|
H(0) = 0x67452301;
|
|
H(1) = 0xefcdab89;
|
|
H(2) = 0x98badcfe;
|
|
H(3) = 0x10325476;
|
|
H(4) = 0xc3d2e1f0;
|
|
}
|
|
|
|
void
|
|
sha1_pad(struct sha1_ctxt *ctxt)
|
|
{
|
|
size_t padlen; /*pad length in bytes*/
|
|
size_t padstart;
|
|
|
|
PUTPAD(0x80);
|
|
|
|
padstart = COUNT % 64;
|
|
padlen = 64 - padstart;
|
|
if (padlen < 8) {
|
|
bzero(&ctxt->m.b8[padstart], padlen);
|
|
COUNT += (unsigned char)padlen;
|
|
COUNT %= 64;
|
|
sha1_step(ctxt);
|
|
padstart = COUNT % 64; /* should be 0 */
|
|
padlen = 64 - padstart; /* should be 64 */
|
|
}
|
|
bzero(&ctxt->m.b8[padstart], padlen - 8);
|
|
COUNT += ((unsigned char)padlen - 8);
|
|
COUNT %= 64;
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
PUTPAD(ctxt->c.b8[0]); PUTPAD(ctxt->c.b8[1]);
|
|
PUTPAD(ctxt->c.b8[2]); PUTPAD(ctxt->c.b8[3]);
|
|
PUTPAD(ctxt->c.b8[4]); PUTPAD(ctxt->c.b8[5]);
|
|
PUTPAD(ctxt->c.b8[6]); PUTPAD(ctxt->c.b8[7]);
|
|
#else
|
|
PUTPAD(ctxt->c.b8[7]); PUTPAD(ctxt->c.b8[6]);
|
|
PUTPAD(ctxt->c.b8[5]); PUTPAD(ctxt->c.b8[4]);
|
|
PUTPAD(ctxt->c.b8[3]); PUTPAD(ctxt->c.b8[2]);
|
|
PUTPAD(ctxt->c.b8[1]); PUTPAD(ctxt->c.b8[0]);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sha1_loop(struct sha1_ctxt *ctxt, const unsigned char *input, size_t len)
|
|
{
|
|
size_t off;
|
|
|
|
off = 0;
|
|
|
|
while (off < len) {
|
|
size_t gapstart = COUNT % 64, gaplen = 64 - gapstart,
|
|
copysiz = (gaplen < len - off) ? gaplen : len - off;
|
|
|
|
memcpy(&ctxt->m.b8[gapstart], &input[off], copysiz);
|
|
COUNT += (unsigned char)copysiz;
|
|
COUNT %= 64;
|
|
ctxt->c.b64[0] += copysiz * 8;
|
|
if (COUNT % 64 == 0)
|
|
sha1_step(ctxt);
|
|
off += copysiz;
|
|
}
|
|
}
|
|
|
|
void
|
|
sha1_result(struct sha1_ctxt *ctxt, void *digest0)
|
|
{
|
|
unsigned char *digest;
|
|
|
|
digest = (unsigned char *)digest0;
|
|
sha1_pad(ctxt);
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
memcpy(digest, &ctxt->h.b8[0], 20);
|
|
#else
|
|
digest[0] = ctxt->h.b8[3]; digest[1] = ctxt->h.b8[2];
|
|
digest[2] = ctxt->h.b8[1]; digest[3] = ctxt->h.b8[0];
|
|
digest[4] = ctxt->h.b8[7]; digest[5] = ctxt->h.b8[6];
|
|
digest[6] = ctxt->h.b8[5]; digest[7] = ctxt->h.b8[4];
|
|
digest[8] = ctxt->h.b8[11]; digest[9] = ctxt->h.b8[10];
|
|
digest[10] = ctxt->h.b8[9]; digest[11] = ctxt->h.b8[8];
|
|
digest[12] = ctxt->h.b8[15]; digest[13] = ctxt->h.b8[14];
|
|
digest[14] = ctxt->h.b8[13]; digest[15] = ctxt->h.b8[12];
|
|
digest[16] = ctxt->h.b8[19]; digest[17] = ctxt->h.b8[18];
|
|
digest[18] = ctxt->h.b8[17]; digest[19] = ctxt->h.b8[16];
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* This should look and work like the libcrypto implementation
|
|
*/
|
|
|
|
LWS_VISIBLE unsigned char *
|
|
lws_SHA1(const unsigned char *d, size_t n, unsigned char *md)
|
|
{
|
|
struct sha1_ctxt ctx;
|
|
|
|
_sha1_init(&ctx);
|
|
sha1_loop(&ctx, d, n);
|
|
sha1_result(&ctx, (void *)md);
|
|
|
|
return md;
|
|
}
|
|
|
|
#endif /*unsupported*/
|