1/* $OpenLDAP$ */
2/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3 *
4 * Copyright 1998-2011 The OpenLDAP Foundation.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted only as authorized by the OpenLDAP
9 * Public License.
10 *
11 * A copy of this license is available in the file LICENSE in the
12 * top-level directory of the distribution or, alternatively, at
13 * <http://www.OpenLDAP.org/license.html>.
14 */
15/* This work was derived from code developed by Steve Reid and
16 * adapted for use in OpenLDAP by Kurt D. Zeilenga.
17 */
18
19
20/*	Acquired from:
21 *	$OpenBSD: sha1.c,v 1.9 1997/07/23 21:12:32 kstailey Exp $	*/
22/*
23 * SHA-1 in C
24 * By Steve Reid <steve@edmweb.com>
25 * 100% Public Domain
26 *
27 * Test Vectors (from FIPS PUB 180-1)
28 * "abc"
29 *   A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
30 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
31 *   84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
32 * A million repetitions of "a"
33 *   34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
34 */
35/*
36 * This code assumes uint32 is 32 bits and char is 8 bits
37 */
38
39#include "portable.h"
40#include <ac/param.h>
41#include <ac/string.h>
42#include <ac/socket.h>
43#include <ac/bytes.h>
44
45#include "lutil_sha1.h"
46
47#ifdef LUTIL_SHA1_BYTES
48
49/* undefining this will cause pointer alignment errors */
50#define SHA1HANDSOFF		/* Copies data before messing with it. */
51#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
52
53/*
54 * blk0() and blk() perform the initial expand.
55 * I got the idea of expanding during the round function from SSLeay
56 */
57#if BYTE_ORDER == LITTLE_ENDIAN
58# define blk0(i) (block[i] = (rol(block[i],24)&0xFF00FF00) \
59    |(rol(block[i],8)&0x00FF00FF))
60#else
61# define blk0(i) block[i]
62#endif
63#define blk(i) (block[i&15] = rol(block[(i+13)&15]^block[(i+8)&15] \
64    ^block[(i+2)&15]^block[i&15],1))
65
66/*
67 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
68 */
69#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
70#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
71#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
72#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
73#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
74
75
76/*
77 * Hash a single 512-bit block. This is the core of the algorithm.
78 */
79void
80lutil_SHA1Transform( uint32 *state, const unsigned char *buffer )
81{
82    uint32 a, b, c, d, e;
83
84#ifdef SHA1HANDSOFF
85    uint32 block[16];
86    (void)AC_MEMCPY(block, buffer, 64);
87#else
88    uint32 *block = (u_int32 *) buffer;
89#endif
90
91    /* Copy context->state[] to working vars */
92    a = state[0];
93    b = state[1];
94    c = state[2];
95    d = state[3];
96    e = state[4];
97
98    /* 4 rounds of 20 operations each. Loop unrolled. */
99    R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
100    R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
101    R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
102    R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
103    R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
104    R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
105    R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
106    R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
107    R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
108    R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
109    R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
110    R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
111    R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
112    R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
113    R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
114    R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
115    R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
116    R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
117    R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
118    R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
119
120    /* Add the working vars back into context.state[] */
121    state[0] += a;
122    state[1] += b;
123    state[2] += c;
124    state[3] += d;
125    state[4] += e;
126
127    /* Wipe variables */
128    a = b = c = d = e = 0;
129}
130
131
132/*
133 * lutil_SHA1Init - Initialize new context
134 */
135void
136lutil_SHA1Init( lutil_SHA1_CTX *context )
137{
138
139    /* SHA1 initialization constants */
140    context->state[0] = 0x67452301;
141    context->state[1] = 0xEFCDAB89;
142    context->state[2] = 0x98BADCFE;
143    context->state[3] = 0x10325476;
144    context->state[4] = 0xC3D2E1F0;
145    context->count[0] = context->count[1] = 0;
146}
147
148
149/*
150 * Run your data through this.
151 */
152void
153lutil_SHA1Update(
154    lutil_SHA1_CTX	*context,
155    const unsigned char	*data,
156    uint32		len
157)
158{
159    u_int i, j;
160
161    j = context->count[0];
162    if ((context->count[0] += len << 3) < j)
163	context->count[1] += (len>>29)+1;
164    j = (j >> 3) & 63;
165    if ((j + len) > 63) {
166	(void)AC_MEMCPY(&context->buffer[j], data, (i = 64-j));
167	lutil_SHA1Transform(context->state, context->buffer);
168	for ( ; i + 63 < len; i += 64)
169	    lutil_SHA1Transform(context->state, &data[i]);
170	j = 0;
171    } else {
172	i = 0;
173    }
174    (void)AC_MEMCPY(&context->buffer[j], &data[i], len - i);
175}
176
177
178/*
179 * Add padding and return the message digest.
180 */
181void
182lutil_SHA1Final( unsigned char *digest, lutil_SHA1_CTX *context )
183{
184    u_int i;
185    unsigned char finalcount[8];
186
187    for (i = 0; i < 8; i++) {
188	finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
189	 >> ((3-(i & 3)) * 8) ) & 255);	 /* Endian independent */
190    }
191    lutil_SHA1Update(context, (unsigned char *)"\200", 1);
192    while ((context->count[0] & 504) != 448)
193	lutil_SHA1Update(context, (unsigned char *)"\0", 1);
194    lutil_SHA1Update(context, finalcount, 8);  /* Should cause a SHA1Transform() */
195
196    if (digest) {
197	for (i = 0; i < 20; i++)
198	    digest[i] = (unsigned char)
199		((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
200    }
201}
202
203
204/* sha1hl.c
205 * ----------------------------------------------------------------------------
206 * "THE BEER-WARE LICENSE" (Revision 42):
207 * <phk@login.dkuug.dk> wrote this file.  As long as you retain this notice you
208 * can do whatever you want with this stuff. If we meet some day, and you think
209 * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
210 * ----------------------------------------------------------------------------
211 */
212
213#if defined(LIBC_SCCS) && !defined(lint)
214static char rcsid[] = "$OpenBSD: sha1hl.c,v 1.1 1997/07/12 20:06:03 millert Exp $";
215#endif /* LIBC_SCCS and not lint */
216
217#include <stdio.h>
218#include <ac/stdlib.h>
219
220#include <ac/errno.h>
221#include <ac/unistd.h>
222
223#ifdef HAVE_SYS_FILE_H
224#include <sys/file.h>
225#endif
226
227#ifdef HAVE_IO_H
228#include <io.h>
229#endif
230
231#ifdef HAVE_FCNTL_H
232#include <fcntl.h>
233#endif
234
235
236/* ARGSUSED */
237char *
238lutil_SHA1End( lutil_SHA1_CTX *ctx, char *buf )
239{
240    int i;
241    char *p = buf;
242    unsigned char digest[20];
243    static const char hex[]="0123456789abcdef";
244
245    if (p == NULL && (p = malloc(41)) == NULL)
246	return 0;
247
248    lutil_SHA1Final(digest,ctx);
249    for (i = 0; i < 20; i++) {
250	p[i + i] = hex[digest[i] >> 4];
251	p[i + i + 1] = hex[digest[i] & 0x0f];
252    }
253    p[i + i] = '\0';
254    return(p);
255}
256
257char *
258lutil_SHA1File( char *filename, char *buf )
259{
260    unsigned char buffer[BUFSIZ];
261    lutil_SHA1_CTX ctx;
262    int fd, num, oerrno;
263
264    lutil_SHA1Init(&ctx);
265
266    if ((fd = open(filename,O_RDONLY)) < 0)
267	return(0);
268
269    while ((num = read(fd, buffer, sizeof(buffer))) > 0)
270	lutil_SHA1Update(&ctx, buffer, num);
271
272    oerrno = errno;
273    close(fd);
274    errno = oerrno;
275    return(num < 0 ? 0 : lutil_SHA1End(&ctx, buf));
276}
277
278char *
279lutil_SHA1Data( const unsigned char *data, size_t len, char *buf )
280{
281    lutil_SHA1_CTX ctx;
282
283    lutil_SHA1Init(&ctx);
284    lutil_SHA1Update(&ctx, data, len);
285    return(lutil_SHA1End(&ctx, buf));
286}
287
288#endif
289