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https://github.com/openssl/openssl.git
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51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/*
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* Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <openssl/asn1.h>
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#include <openssl/conf.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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int main(int argc, char **argv)
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{
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X509 *cert;
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FILE *inf;
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int i, count;
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X509_EXTENSION *ext;
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X509V3_add_standard_extensions();
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ERR_load_crypto_strings();
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if (!argv[1]) {
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fprintf(stderr, "Usage v3prin cert.pem\n");
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exit(1);
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}
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if ((inf = fopen(argv[1], "r")) == NULL) {
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fprintf(stderr, "Can't open %s\n", argv[1]);
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exit(1);
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}
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if ((cert = PEM_read_X509(inf, NULL, NULL)) == NULL) {
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fprintf(stderr, "Can't read certificate %s\n", argv[1]);
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ERR_print_errors_fp(stderr);
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exit(1);
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}
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fclose(inf);
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count = X509_get_ext_count(cert);
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printf("%d extensions\n", count);
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for (i = 0; i < count; i++) {
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ext = X509_get_ext(cert, i);
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printf("%s\n", OBJ_nid2ln(OBJ_obj2nid(ext->object)));
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if (!X509V3_EXT_print_fp(stdout, ext, 0, 0))
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ERR_print_errors_fp(stderr);
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printf("\n");
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}
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return 0;
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}
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