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SSL_get_peer_certificate.3ssl
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_get_peer_certificate \- get the X509 certificate of the peer .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& X509 *SSL_get_peer_certificate(const SSL *ssl); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_get_peer_certificate()\fR returns a pointer to the X509 certificate the peer presented. If the peer did not present a certificate, \s-1NULL\s0 is returned. .SH "NOTES" .IX Header "NOTES" Due to the protocol definition, a \s-1TLS/SSL\s0 server will always send a certificate, if present. A client will only send a certificate when explicitly requested to do so by the server (see \&\fBSSL_CTX_set_verify\fR\|(3)). If an anonymous cipher is used, no certificates are sent. .PP That a certificate is returned does not indicate information about the verification state, use \fBSSL_get_verify_result\fR\|(3) to check the verification state. .PP The reference count of the X509 object is incremented by one, so that it will not be destroyed when the session containing the peer certificate is freed. The X509 object must be explicitly freed using \fBX509_free()\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" The following return values can occur: .IP "\s-1NULL\s0" 4 .IX Item "NULL" No certificate was presented by the peer or no connection was established. .IP "Pointer to an X509 certificate" 4 .IX Item "Pointer to an X509 certificate" The return value points to the certificate presented by the peer. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\|(3), \fBSSL_get_verify_result\fR\|(3), \&\fBSSL_CTX_set_verify\fR\|(3)
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