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Last change
on this file since 83531 was 83531, checked in by vboxsync, 5 years ago |
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setting svn:sync-process=export for openssl-1.1.1f, all files except tests
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| 1 | =pod
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | X509_check_ca - check if given certificate is CA certificate
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| 6 |
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| 7 | =head1 SYNOPSIS
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| 8 |
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| 9 | #include <openssl/x509v3.h>
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| 10 |
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| 11 | int X509_check_ca(X509 *cert);
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| 12 |
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| 13 | =head1 DESCRIPTION
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| 14 |
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| 15 | This function checks if given certificate is CA certificate (can be used
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| 16 | to sign other certificates).
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| 17 |
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| 18 | =head1 RETURN VALUES
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| 19 |
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| 20 | Function return 0, if it is not CA certificate, 1 if it is proper X509v3
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| 21 | CA certificate with B<basicConstraints> extension CA:TRUE,
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| 22 | 3, if it is self-signed X509 v1 certificate, 4, if it is certificate with
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| 23 | B<keyUsage> extension with bit B<keyCertSign> set, but without
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| 24 | B<basicConstraints>, and 5 if it has outdated Netscape Certificate Type
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| 25 | extension telling that it is CA certificate.
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| 26 |
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| 27 | Actually, any non-zero value means that this certificate could have been
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| 28 | used to sign other certificates.
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| 29 |
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| 30 | =head1 SEE ALSO
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| 31 |
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| 32 | L<X509_verify_cert(3)>,
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| 33 | L<X509_check_issued(3)>,
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| 34 | L<X509_check_purpose(3)>
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| 35 |
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| 36 | =head1 COPYRIGHT
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| 37 |
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| 38 | Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
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| 39 |
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| 40 | Licensed under the OpenSSL license (the "License"). You may not use
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| 41 | this file except in compliance with the License. You can obtain a copy
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| 42 | in the file LICENSE in the source distribution or at
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| 43 | L<https://www.openssl.org/source/license.html>.
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| 44 |
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| 45 | =cut
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