Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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/* v3prin.c */
/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
* 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL 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. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <openssl/asn1.h>
#include <openssl/conf.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
int main(int argc, char **argv)
{
X509 *cert;
FILE *inf;
int i, count;
X509_EXTENSION *ext;
X509V3_add_standard_extensions();
ERR_load_crypto_strings();
if (!argv[1]) {
fprintf(stderr, "Usage v3prin cert.pem\n");
exit(1);
}
if (!(inf = fopen(argv[1], "r"))) {
fprintf(stderr, "Can't open %s\n", argv[1]);
exit(1);
}
if (!(cert = PEM_read_X509(inf, NULL, NULL))) {
fprintf(stderr, "Can't read certificate %s\n", argv[1]);
ERR_print_errors_fp(stderr);
exit(1);
}
fclose(inf);
count = X509_get_ext_count(cert);
printf("%d extensions\n", count);
for (i = 0; i < count; i++) {
ext = X509_get_ext(cert, i);
printf("%s\n", OBJ_nid2ln(OBJ_obj2nid(ext->object)));
if (!X509V3_EXT_print_fp(stdout, ext, 0, 0))
ERR_print_errors_fp(stderr);
printf("\n");
}
return 0;
}