1SSL_GET_PEER_CERTIFICATE(3ossl)     OpenSSL    SSL_GET_PEER_CERTIFICATE(3ossl)
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NAME

6       SSL_get_peer_certificate, SSL_get0_peer_certificate,
7       SSL_get1_peer_certificate - get the X509 certificate of the peer
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SYNOPSIS

10        #include <openssl/ssl.h>
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12        X509 *SSL_get_peer_certificate(const SSL *ssl);
13        X509 *SSL_get0_peer_certificate(const SSL *ssl);
14        X509 *SSL_get1_peer_certificate(const SSL *ssl);
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DESCRIPTION

17       These functions return a pointer to the X509 certificate the peer
18       presented. If the peer did not present a certificate, NULL is returned.
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NOTES

21       Due to the protocol definition, a TLS/SSL server will always send a
22       certificate, if present. A client will only send a certificate when
23       explicitly requested to do so by the server (see
24       SSL_CTX_set_verify(3)). If an anonymous cipher is used, no certificates
25       are sent.
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27       That a certificate is returned does not indicate information about the
28       verification state, use SSL_get_verify_result(3) to check the
29       verification state.
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31       The reference count of the X509 object returned by
32       SSL_get1_peer_certificate() is incremented by one, so that it will not
33       be destroyed when the session containing the peer certificate is freed.
34       The X509 object must be explicitly freed using X509_free().
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36       The reference count of the X509 object returned by
37       SSL_get0_peer_certificate() is not incremented, and must not be freed.
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39       SSL_get_peer_certificate() is an alias of SSL_get1_peer_certificate().
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RETURN VALUES

42       The following return values can occur:
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44       NULL
45           No certificate was presented by the peer or no connection was
46           established.
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48       Pointer to an X509 certificate
49           The return value points to the certificate presented by the peer.
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SEE ALSO

52       ssl(7), SSL_get_verify_result(3), SSL_CTX_set_verify(3)
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HISTORY

55       SSL_get0_peer_certificate() and SSL_get1_peer_certificate() were added
56       in 3.0.0.  SSL_get_peer_certificate() was deprecated in 3.0.0.
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59       Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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61       Licensed under the Apache License 2.0 (the "License").  You may not use
62       this file except in compliance with the License.  You can obtain a copy
63       in the file LICENSE in the source distribution or at
64       <https://www.openssl.org/source/license.html>.
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683.0.5                             2022-07-05   SSL_GET_PEER_CERTIFICATE(3ossl)
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