1/* $KAME: sha1.c,v 1.5 2000/11/08 06:13:08 itojun Exp $ */ 2/* 3 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the project nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31/* 32 * FIPS pub 180-1: Secure Hash Algorithm (SHA-1) 33 * based on: http://csrc.nist.gov/fips/fip180-1.txt 34 * implemented by Jun-ichiro itojun Itoh <itojun@itojun.org> 35 */ 36 37#if 0 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: src/sys/crypto/sha1.c,v 1.9 2003/06/10 21:36:57 obrien Exp $"); 40 41#include <sys/types.h> 42#include <sys/cdefs.h> 43#include <sys/time.h> 44#include <sys/systm.h> 45 46#include <crypto/sha1.h> 47#endif 48 49/* sanity check */ 50#if BYTE_ORDER != BIG_ENDIAN 51# if BYTE_ORDER != LITTLE_ENDIAN 52# define unsupported 1 53# endif 54#endif 55 56#ifndef unsupported 57 58/* constant table */ 59static u_int32_t _K[] = { 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6 }; 60#define K(t) _K[(t) / 20] 61 62#define F0(b, c, d) (((b) & (c)) | ((~(b)) & (d))) 63#define F1(b, c, d) (((b) ^ (c)) ^ (d)) 64#define F2(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d))) 65#define F3(b, c, d) (((b) ^ (c)) ^ (d)) 66 67#define S(n, x) (((x) << (n)) | ((x) >> (32 - n))) 68 69#undef H 70#define H(n) (ctxt->h.b32[(n)]) 71#define COUNT (ctxt->count) 72#define BCOUNT (ctxt->c.b64[0] / 8) 73#define W(n) (ctxt->m.b32[(n)]) 74 75#define PUTBYTE(x) { \ 76 ctxt->m.b8[(COUNT % 64)] = (x); \ 77 COUNT++; \ 78 COUNT %= 64; \ 79 ctxt->c.b64[0] += 8; \ 80 if (COUNT % 64 == 0) \ 81 sha1_step(ctxt); \ 82 } 83 84#define PUTPAD(x) { \ 85 ctxt->m.b8[(COUNT % 64)] = (x); \ 86 COUNT++; \ 87 COUNT %= 64; \ 88 if (COUNT % 64 == 0) \ 89 sha1_step(ctxt); \ 90 } 91 92static void sha1_step(struct sha1_ctxt *); 93 94static void 95sha1_step(ctxt) 96 struct sha1_ctxt *ctxt; 97{ 98 u_int32_t a, b, c, d, e; 99 size_t t, s; 100 u_int32_t tmp; 101 102#if BYTE_ORDER == LITTLE_ENDIAN 103 struct sha1_ctxt tctxt; 104 bcopy(&ctxt->m.b8[0], &tctxt.m.b8[0], 64); 105 ctxt->m.b8[0] = tctxt.m.b8[3]; ctxt->m.b8[1] = tctxt.m.b8[2]; 106 ctxt->m.b8[2] = tctxt.m.b8[1]; ctxt->m.b8[3] = tctxt.m.b8[0]; 107 ctxt->m.b8[4] = tctxt.m.b8[7]; ctxt->m.b8[5] = tctxt.m.b8[6]; 108 ctxt->m.b8[6] = tctxt.m.b8[5]; ctxt->m.b8[7] = tctxt.m.b8[4]; 109 ctxt->m.b8[8] = tctxt.m.b8[11]; ctxt->m.b8[9] = tctxt.m.b8[10]; 110 ctxt->m.b8[10] = tctxt.m.b8[9]; ctxt->m.b8[11] = tctxt.m.b8[8]; 111 ctxt->m.b8[12] = tctxt.m.b8[15]; ctxt->m.b8[13] = tctxt.m.b8[14]; 112 ctxt->m.b8[14] = tctxt.m.b8[13]; ctxt->m.b8[15] = tctxt.m.b8[12]; 113 ctxt->m.b8[16] = tctxt.m.b8[19]; ctxt->m.b8[17] = tctxt.m.b8[18]; 114 ctxt->m.b8[18] = tctxt.m.b8[17]; ctxt->m.b8[19] = tctxt.m.b8[16]; 115 ctxt->m.b8[20] = tctxt.m.b8[23]; ctxt->m.b8[21] = tctxt.m.b8[22]; 116 ctxt->m.b8[22] = tctxt.m.b8[21]; ctxt->m.b8[23] = tctxt.m.b8[20]; 117 ctxt->m.b8[24] = tctxt.m.b8[27]; ctxt->m.b8[25] = tctxt.m.b8[26]; 118 ctxt->m.b8[26] = tctxt.m.b8[25]; ctxt->m.b8[27] = tctxt.m.b8[24]; 119 ctxt->m.b8[28] = tctxt.m.b8[31]; ctxt->m.b8[29] = tctxt.m.b8[30]; 120 ctxt->m.b8[30] = tctxt.m.b8[29]; ctxt->m.b8[31] = tctxt.m.b8[28]; 121 ctxt->m.b8[32] = tctxt.m.b8[35]; ctxt->m.b8[33] = tctxt.m.b8[34]; 122 ctxt->m.b8[34] = tctxt.m.b8[33]; ctxt->m.b8[35] = tctxt.m.b8[32]; 123 ctxt->m.b8[36] = tctxt.m.b8[39]; ctxt->m.b8[37] = tctxt.m.b8[38]; 124 ctxt->m.b8[38] = tctxt.m.b8[37]; ctxt->m.b8[39] = tctxt.m.b8[36]; 125 ctxt->m.b8[40] = tctxt.m.b8[43]; ctxt->m.b8[41] = tctxt.m.b8[42]; 126 ctxt->m.b8[42] = tctxt.m.b8[41]; ctxt->m.b8[43] = tctxt.m.b8[40]; 127 ctxt->m.b8[44] = tctxt.m.b8[47]; ctxt->m.b8[45] = tctxt.m.b8[46]; 128 ctxt->m.b8[46] = tctxt.m.b8[45]; ctxt->m.b8[47] = tctxt.m.b8[44]; 129 ctxt->m.b8[48] = tctxt.m.b8[51]; ctxt->m.b8[49] = tctxt.m.b8[50]; 130 ctxt->m.b8[50] = tctxt.m.b8[49]; ctxt->m.b8[51] = tctxt.m.b8[48]; 131 ctxt->m.b8[52] = tctxt.m.b8[55]; ctxt->m.b8[53] = tctxt.m.b8[54]; 132 ctxt->m.b8[54] = tctxt.m.b8[53]; ctxt->m.b8[55] = tctxt.m.b8[52]; 133 ctxt->m.b8[56] = tctxt.m.b8[59]; ctxt->m.b8[57] = tctxt.m.b8[58]; 134 ctxt->m.b8[58] = tctxt.m.b8[57]; ctxt->m.b8[59] = tctxt.m.b8[56]; 135 ctxt->m.b8[60] = tctxt.m.b8[63]; ctxt->m.b8[61] = tctxt.m.b8[62]; 136 ctxt->m.b8[62] = tctxt.m.b8[61]; ctxt->m.b8[63] = tctxt.m.b8[60]; 137#endif 138 139 a = H(0); b = H(1); c = H(2); d = H(3); e = H(4); 140 141 for (t = 0; t < 20; t++) { 142 s = t & 0x0f; 143 if (t >= 16) { 144 W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); 145 } 146 tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t); 147 e = d; d = c; c = S(30, b); b = a; a = tmp; 148 } 149 for (t = 20; t < 40; t++) { 150 s = t & 0x0f; 151 W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); 152 tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t); 153 e = d; d = c; c = S(30, b); b = a; a = tmp; 154 } 155 for (t = 40; t < 60; t++) { 156 s = t & 0x0f; 157 W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); 158 tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t); 159 e = d; d = c; c = S(30, b); b = a; a = tmp; 160 } 161 for (t = 60; t < 80; t++) { 162 s = t & 0x0f; 163 W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); 164 tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t); 165 e = d; d = c; c = S(30, b); b = a; a = tmp; 166 } 167 168 H(0) = H(0) + a; 169 H(1) = H(1) + b; 170 H(2) = H(2) + c; 171 H(3) = H(3) + d; 172 H(4) = H(4) + e; 173 174 bzero(&ctxt->m.b8[0], 64); 175} 176 177/*------------------------------------------------------------*/ 178 179void 180sha1_init(ctxt) 181 struct sha1_ctxt *ctxt; 182{ 183 bzero(ctxt, sizeof(struct sha1_ctxt)); 184 H(0) = 0x67452301; 185 H(1) = 0xefcdab89; 186 H(2) = 0x98badcfe; 187 H(3) = 0x10325476; 188 H(4) = 0xc3d2e1f0; 189} 190 191void 192sha1_pad(ctxt) 193 struct sha1_ctxt *ctxt; 194{ 195 size_t padlen; /*pad length in bytes*/ 196 size_t padstart; 197 198 PUTPAD(0x80); 199 200 padstart = COUNT % 64; 201 padlen = 64 - padstart; 202 if (padlen < 8) { 203 bzero(&ctxt->m.b8[padstart], padlen); 204 COUNT += padlen; 205 COUNT %= 64; 206 sha1_step(ctxt); 207 padstart = COUNT % 64; /* should be 0 */ 208 padlen = 64 - padstart; /* should be 64 */ 209 } 210 bzero(&ctxt->m.b8[padstart], padlen - 8); 211 COUNT += (padlen - 8); 212 COUNT %= 64; 213#if BYTE_ORDER == BIG_ENDIAN 214 PUTPAD(ctxt->c.b8[0]); PUTPAD(ctxt->c.b8[1]); 215 PUTPAD(ctxt->c.b8[2]); PUTPAD(ctxt->c.b8[3]); 216 PUTPAD(ctxt->c.b8[4]); PUTPAD(ctxt->c.b8[5]); 217 PUTPAD(ctxt->c.b8[6]); PUTPAD(ctxt->c.b8[7]); 218#else 219 PUTPAD(ctxt->c.b8[7]); PUTPAD(ctxt->c.b8[6]); 220 PUTPAD(ctxt->c.b8[5]); PUTPAD(ctxt->c.b8[4]); 221 PUTPAD(ctxt->c.b8[3]); PUTPAD(ctxt->c.b8[2]); 222 PUTPAD(ctxt->c.b8[1]); PUTPAD(ctxt->c.b8[0]); 223#endif 224} 225 226void 227sha1_loop(ctxt, input, len) 228 struct sha1_ctxt *ctxt; 229 const u_int8_t *input; 230 size_t len; 231{ 232 size_t gaplen; 233 size_t gapstart; 234 size_t off; 235 size_t copysiz; 236 237 off = 0; 238 239 while (off < len) { 240 gapstart = COUNT % 64; 241 gaplen = 64 - gapstart; 242 243 copysiz = (gaplen < len - off) ? gaplen : len - off; 244 bcopy(&input[off], &ctxt->m.b8[gapstart], copysiz); 245 COUNT += copysiz; 246 COUNT %= 64; 247 ctxt->c.b64[0] += copysiz * 8; 248 if (COUNT % 64 == 0) 249 sha1_step(ctxt); 250 off += copysiz; 251 } 252} 253 254void 255sha1_result(ctxt, digest0) 256 struct sha1_ctxt *ctxt; 257 caddr_t digest0; 258{ 259 u_int8_t *digest; 260 261 digest = (u_int8_t *)digest0; 262 sha1_pad(ctxt); 263#if BYTE_ORDER == BIG_ENDIAN 264 bcopy(&ctxt->h.b8[0], digest, 20); 265#else 266 digest[0] = ctxt->h.b8[3]; digest[1] = ctxt->h.b8[2]; 267 digest[2] = ctxt->h.b8[1]; digest[3] = ctxt->h.b8[0]; 268 digest[4] = ctxt->h.b8[7]; digest[5] = ctxt->h.b8[6]; 269 digest[6] = ctxt->h.b8[5]; digest[7] = ctxt->h.b8[4]; 270 digest[8] = ctxt->h.b8[11]; digest[9] = ctxt->h.b8[10]; 271 digest[10] = ctxt->h.b8[9]; digest[11] = ctxt->h.b8[8]; 272 digest[12] = ctxt->h.b8[15]; digest[13] = ctxt->h.b8[14]; 273 digest[14] = ctxt->h.b8[13]; digest[15] = ctxt->h.b8[12]; 274 digest[16] = ctxt->h.b8[19]; digest[17] = ctxt->h.b8[18]; 275 digest[18] = ctxt->h.b8[17]; digest[19] = ctxt->h.b8[16]; 276#endif 277} 278 279#endif /*unsupported*/ 280