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v3prin.c
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1 /* v3prin.c */
2 /* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
3  * project 1999.
4  */
5 /* ====================================================================
6  * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  * software must display the following acknowledgment:
22  * "This product includes software developed by the OpenSSL Project
23  * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  * endorse or promote products derived from this software without
27  * prior written permission. For written permission, please contact
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  * nor may "OpenSSL" appear in their names without prior written
32  * permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  * acknowledgment:
36  * "This product includes software developed by the OpenSSL Project
37  * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * ([email protected]). This product includes software written by Tim
55  * Hudson ([email protected]).
56  *
57  */
58 
59 
60 
61 #include <stdio.h>
62 #include <openssl/asn1.h>
63 #include <openssl/conf.h>
64 #include <openssl/x509.h>
65 #include <openssl/x509v3.h>
66 
67 int main(int argc, char **argv)
68 {
69  X509 *cert;
70  FILE *inf;
71  int i, count;
75  if(!argv[1]) {
76  fprintf(stderr, "Usage v3prin cert.pem\n");
77  exit(1);
78  }
79  if(!(inf = fopen(argv[1], "r"))) {
80  fprintf(stderr, "Can't open %s\n", argv[1]);
81  exit(1);
82  }
83  if(!(cert = PEM_read_X509(inf, NULL, NULL))) {
84  fprintf(stderr, "Can't read certificate %s\n", argv[1]);
85  ERR_print_errors_fp(stderr);
86  exit(1);
87  }
88  fclose(inf);
89  count = X509_get_ext_count(cert);
90  printf("%d extensions\n", count);
91  for(i = 0; i < count; i++) {
92  ext = X509_get_ext(cert, i);
93  printf("%s\n", OBJ_nid2ln(OBJ_obj2nid(ext->object)));
94  if(!X509V3_EXT_print_fp(stdout, ext, 0, 0)) ERR_print_errors_fp(stderr);
95  printf("\n");
96 
97  }
98  return 0;
99 }