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74 lines
2.3 KiB
Plaintext
74 lines
2.3 KiB
Plaintext
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=pod
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=head1 NAME
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SSL_get_certificate, SSL_get_privatekey - retrieve TLS/SSL certificate and
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private key
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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X509 *SSL_get_certificate(const SSL *s);
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EVP_PKEY *SSL_get_privatekey(const SSL *s);
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=head1 DESCRIPTION
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SSL_get_certificate() returns a pointer to an B<X509> object representing a
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certificate used as the local peer's identity.
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Multiple certificates can be configured; for example, a server might have both
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RSA and ECDSA certificates. The certificate which is returned by
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SSL_get_certificate() is determined as follows:
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=over 4
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=item
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If it is called before certificate selection has occurred, it returns the most
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recently added certificate, or NULL if no certificate has been added.
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=item
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After certificate selection has occurred, it returns the certificate which was
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selected during the handshake, or NULL if no certificate was selected (for
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example, on a client where no client certificate is in use).
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=back
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Certificate selection occurs during the handshake; therefore, the value returned
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by SSL_get_certificate() during any callback made during the handshake process
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will depend on whether that callback is made before or after certificate
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selection occurs.
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A specific use for SSL_get_certificate() is inside a callback set via a call to
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L<SSL_CTX_set_tlsext_status_cb(3)>. This callback occurs after certificate
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selection, where it can be used to examine a server's chosen certificate, for
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example for the purpose of identifying a certificate's OCSP responder URL so
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that an OCSP response can be obtained.
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SSL_get_privatekey() returns a pointer to the B<EVP_PKEY> object corresponding
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to the certificate returned by SSL_get_certificate(), if any.
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=head1 RETURN VALUES
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These functions return pointers to their respective objects, or NULL if no such
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object is available. Returned objects are owned by the SSL object and should not
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be freed by users of these functions.
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=head1 SEE ALSO
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L<ssl(7)>, L<SSL_CTX_set_tlsext_status_cb(3)>
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=head1 COPYRIGHT
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Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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