SSL_get_peer_certificate - get the X509 certificate of the peer
#include <openssl/ssl.h> X509 *SSL_get_peer_certificate(const SSL *ssl);
OpenSSL SSL_get_peer_certificate(3openssl) NAME SSL_get_peer_certificate - get the X509 certificate of the peer SYNOPSIS #include <openssl/ssl.h> X509 *SSL_get_peer_certificate(const SSL *ssl); DESCRIPTION SSL_get_peer_certificate() returns a pointer to the X509 certificate the peer presented. If the peer did not present a certificate, NULL is returned. ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+--------------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+--------------------------+ |Availability | library/security/openssl | +---------------+--------------------------+ |Stability | Pass-through uncommitted | +---------------+--------------------------+ NOTES Due to the protocol definition, a TLS/SSL 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 SSL_CTX_set_verify(3)). If an anonymous cipher is used, no certificates are sent. That a certificate is returned does not indicate information about the verification state, use SSL_get_verify_result(3) to check the verification state. 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 X509_free(). Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://www.openssl.org/source/openssl-1.0.2ze.tar.gz. Further information about this software can be found on the open source community website at https://www.openssl.org/. RETURN VALUES The following return values can occur: NULL No certificate was presented by the peer or no connection was established. Pointer to an X509 certificate The return value points to the certificate presented by the peer. SEE ALSO ssl(3), SSL_get_verify_result(3), SSL_CTX_set_verify(3) 1.0.2ze 2022-05-03 SSL_get_peer_certificate(3openssl)