| Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1999 Markus Friedl. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * 3. All advertising materials mentioning features or use of this software |
| 13 | * must display the following acknowledgement: |
| 14 | * This product includes software developed by Markus Friedl. |
| 15 | * 4. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "includes.h" |
| 31 | RCSID("$Id: fingerprint.c,v 1.4 1999/11/24 16:15:25 markus Exp $"); |
| 32 | |
| 33 | #include "ssh.h" |
| 34 | #include "xmalloc.h" |
| 35 | #ifdef HAVE_OPENSSL |
| 36 | #include <openssl/md5.h> |
| 37 | #endif |
| 38 | #ifdef HAVE_SSL |
| 39 | #include <ssl/md5.h> |
| 40 | #endif |
| 41 | |
| 42 | #define FPRINT "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x" |
| 43 | |
| 44 | /* |
| 45 | * Generate key fingerprint in ascii format. |
| 46 | * Based on ideas and code from Bjoern Groenvall <bg@sics.se> |
| 47 | */ |
| 48 | char * |
| 49 | fingerprint(BIGNUM *e, BIGNUM *n) |
| 50 | { |
| 51 | static char retval[80]; |
| 52 | MD5_CTX md; |
| 53 | unsigned char d[16]; |
| 54 | char *buf; |
| 55 | int nlen, elen; |
| 56 | |
| 57 | nlen = BN_num_bytes(n); |
| 58 | elen = BN_num_bytes(e); |
| 59 | |
| 60 | buf = xmalloc(nlen + elen); |
| 61 | |
| 62 | BN_bn2bin(n, buf); |
| 63 | BN_bn2bin(e, buf + nlen); |
| 64 | |
| 65 | MD5_Init(&md); |
| 66 | MD5_Update(&md, buf, nlen + elen); |
| 67 | MD5_Final(d, &md); |
| 68 | snprintf(retval, sizeof(retval), FPRINT, |
| 69 | d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], |
| 70 | d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]); |
| 71 | memset(buf, 0, nlen + elen); |
| 72 | xfree(buf); |
| 73 | return retval; |
| 74 | } |