180 lines
5.3 KiB
Groff
180 lines
5.3 KiB
Groff
.\" $NetBSD: SSL_get_peer_certificate.3,v 1.15 2007/11/27 22:19:39 christos Exp $
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.\" ========================================================================
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.\"
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.IX Title "SSL_get_peer_certificate 3"
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.TH SSL_get_peer_certificate 3 "2005-04-23" "0.9.8e" "OpenSSL"
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.SH "NAME"
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SSL_get_peer_certificate \- get the X509 certificate of the peer
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ssl.h>
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.Ve
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.PP
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.Vb 1
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\& X509 *SSL_get_peer_certificate(const SSL *ssl);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fISSL_get_peer_certificate()\fR returns a pointer to the X509 certificate the
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peer presented. If the peer did not present a certificate, \s-1NULL\s0 is returned.
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.SH "NOTES"
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.IX Header "NOTES"
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Due to the protocol definition, a \s-1TLS/SSL\s0 server will always send a
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certificate, if present. A client will only send a certificate when
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explicitly requested to do so by the server (see
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\&\fISSL_CTX_set_verify\fR\|(3)). If an anonymous cipher
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is used, no certificates are sent.
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.PP
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That a certificate is returned does not indicate information about the
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verification state, use \fISSL_get_verify_result\fR\|(3)
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to check the verification state.
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.PP
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The reference count of the X509 object is incremented by one, so that it
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will not be destroyed when the session containing the peer certificate is
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freed. The X509 object must be explicitly freed using \fIX509_free()\fR.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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The following return values can occur:
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.IP "\s-1NULL\s0" 4
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.IX Item "NULL"
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No certificate was presented by the peer or no connection was established.
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.IP "Pointer to an X509 certificate" 4
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.IX Item "Pointer to an X509 certificate"
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The return value points to the certificate presented by the peer.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIssl\fR\|(3), \fISSL_get_verify_result\fR\|(3),
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\&\fISSL_CTX_set_verify\fR\|(3)
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