diff options
Diffstat (limited to 'sys/crypto/hmac_md5.c')
| -rw-r--r-- | sys/crypto/hmac_md5.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/sys/crypto/hmac_md5.c b/sys/crypto/hmac_md5.c new file mode 100644 index 0000000..5302dbe --- /dev/null +++ b/sys/crypto/hmac_md5.c @@ -0,0 +1,98 @@ +/* + * 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. + * + * $FreeBSD$ + */ + +/* + * Based on sample code appeared on RFC2104. + */ + +#include <sys/types.h> +#include <sys/cdefs.h> +#include <sys/time.h> +#include <sys/systm.h> +#include <crypto/md5.h> + +#include <crypto/hmac_md5.h> + +void +hmac_md5(src0, srclen, key0, keylen, digest) + caddr_t src0; + size_t srclen; + caddr_t key0; + size_t keylen; + caddr_t digest; +{ + u_int8_t *src; + u_int8_t *key; + u_int8_t tk[16]; + u_int8_t ipad[65]; + u_int8_t opad[65]; + size_t i; + + src = (u_int8_t *)src0; + key = (u_int8_t *)key0; + + /* + * compress the key into 16bytes, if key is too long. + */ + if (64 < keylen) { + md5_init(); + md5_loop(key, keylen); + md5_pad(); + md5_result(&tk[0]); + key = &tk[0]; + keylen = 16; + } + + /* + * + */ + bzero(&ipad[0], sizeof ipad); + bzero(&opad[0], sizeof opad); + bcopy(key, &ipad[0], keylen); + bcopy(key, &opad[0], keylen); + + for (i = 0; i < 64; i++) { + ipad[i] ^= 0x36; + opad[i] ^= 0x5c; + } + + md5_init(); + md5_loop(&ipad[0], 64); + md5_loop(src, srclen); + md5_pad(); + md5_result((u_int8_t *)digest); + + md5_init(); + md5_loop(&opad[0], 64); + md5_loop((u_int8_t *)digest, 16); + md5_pad(); + md5_result((u_int8_t *)digest); +} |
