package/ubsec_ssb/src/sha1.c

   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 */
  59 static 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
  92 static void sha1_step(struct sha1_ctxt *);
  93
  94 static void
  95 sha1_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
 179 void
 180 sha1_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
 191 void
 192 sha1_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
 226 void
 227 sha1_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
 254 void
 255 sha1_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*/