1=pod 2 3=head1 NAME 4 5SSL_get_peer_signature_nid, SSL_get_peer_signature_type_nid, 6SSL_get_signature_nid, SSL_get_signature_type_nid - get TLS message signing 7types 8 9=head1 SYNOPSIS 10 11 #include <openssl/ssl.h> 12 13 int SSL_get_peer_signature_nid(SSL *ssl, int *psig_nid); 14 int SSL_get_peer_signature_type_nid(const SSL *ssl, int *psigtype_nid); 15 int SSL_get_signature_nid(SSL *ssl, int *psig_nid); 16 int SSL_get_signature_type_nid(const SSL *ssl, int *psigtype_nid); 17 18=head1 DESCRIPTION 19 20SSL_get_peer_signature_nid() sets B<*psig_nid> to the NID of the digest used 21by the peer to sign TLS messages. It is implemented as a macro. 22 23SSL_get_peer_signature_type_nid() sets B<*psigtype_nid> to the signature 24type used by the peer to sign TLS messages. Currently the signature type 25is the NID of the public key type used for signing except for PSS signing 26where it is B<EVP_PKEY_RSA_PSS>. To differentiate between 27B<rsa_pss_rsae_*> and B<rsa_pss_pss_*> signatures, it's necessary to check 28the type of public key in the peer's certificate. 29 30SSL_get_signature_nid() and SSL_get_signature_type_nid() return the equivalent 31information for the local end of the connection. 32 33=head1 RETURN VALUES 34 35These functions return 1 for success and 0 for failure. There are several 36possible reasons for failure: the cipher suite has no signature (e.g. it 37uses RSA key exchange or is anonymous), the TLS version is below 1.2 or 38the functions were called too early, e.g. before the peer signed a message. 39 40=head1 SEE ALSO 41 42L<ssl(7)>, L<SSL_get_peer_certificate(3)>, 43 44=head1 COPYRIGHT 45 46Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved. 47 48Licensed under the OpenSSL license (the "License"). You may not use 49this file except in compliance with the License. You can obtain a copy 50in the file LICENSE in the source distribution or at 51L<https://www.openssl.org/source/license.html>. 52 53=cut 54