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Diffstat (limited to 'source4/heimdal/lib/des/md2.c')
| -rw-r--r-- | source4/heimdal/lib/des/md2.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/source4/heimdal/lib/des/md2.c b/source4/heimdal/lib/des/md2.c new file mode 100644 index 0000000000..91d7afd125 --- /dev/null +++ b/source4/heimdal/lib/des/md2.c @@ -0,0 +1,138 @@ +/* + * Copyright (c) 2006 Kungliga Tekniska Högskolan + * (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: md2.c,v 1.1 2006/01/08 21:47:28 lha Exp $"); +#endif + +#include "hash.h" +#include "md2.h" + +static const unsigned char subst[256] = { + 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6, + 19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188, + 76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24, + 138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251, + 245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63, + 148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50, + 39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165, + 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210, + 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157, + 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27, + 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15, + 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197, + 234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65, + 129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123, + 8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233, + 203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228, + 166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237, + 31, 26, 219, 153, 141, 51, 159, 17, 131, 20 +}; + +void +MD2_Init (struct md2 *m) +{ + memset(m, 0, sizeof(*m)); +} + +static void +calc(struct md2 *m, const void *v) +{ + unsigned char x[48], L; + const unsigned char *p = v; + int i, j, t; + + L = m->checksum[15]; + for (i = 0; i < 16; i++) + L = m->checksum[i] ^= subst[p[i] ^ L]; + + for (i = 0; i < 16; i++) { + x[i] = m->state[i]; + x[i + 16] = p[i]; + x[i + 32] = x[i] ^ p[i]; + } + + t = 0; + for (i = 0; i < 18; i++) { + for (j = 0; j < 48; j++) + t = x[j] ^= subst[t]; + t = (t + i) & 0xff; + } + + memcpy(m->state, x, 16); + memset(x, 0, sizeof(x)); +} + +void +MD2_Update (struct md2 *m, const void *v, size_t len) +{ + size_t idx = m->len & 0xf; + const unsigned char *p = v; + + m->len += len; + if (len + idx >= 16) { + if (idx) { + memcpy(m->data + idx, p, 16 - idx); + calc(m, m->data); + p += 16; + len -= 16 - idx; + } + while (len >= 16) { + calc(m, p); + p += 16; + len -= 16; + } + idx = 0; + } + + memcpy(m->data + idx, p, len); +} + +void +MD2_Final (void *res, struct md2 *m) +{ + unsigned char pad[16]; + size_t padlen; + + padlen = 16 - (m->len % 16); + memset(pad, padlen, padlen); + + MD2_Update(m, pad, padlen); + memcpy(pad, m->checksum, 16); + MD2_Update(m, pad, 16); + + memcpy(res, m->state, MD2_DIGEST_LENGTH); + memset(m, 0, sizeof(m)); +} |