:-'Generic Commit'

dropshell-tool/openssl-1.1.1w/doc/man3/SSL_get_peer_signature_nid.pod

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+=pod
+
+=head1 NAME
+
+SSL_get_peer_signature_nid, SSL_get_peer_signature_type_nid,
+SSL_get_signature_nid, SSL_get_signature_type_nid - get TLS message signing
+types
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ int SSL_get_peer_signature_nid(SSL *ssl, int *psig_nid);
+ int SSL_get_peer_signature_type_nid(const SSL *ssl, int *psigtype_nid);
+ int SSL_get_signature_nid(SSL *ssl, int *psig_nid);
+ int SSL_get_signature_type_nid(const SSL *ssl, int *psigtype_nid);
+
+=head1 DESCRIPTION
+
+SSL_get_peer_signature_nid() sets B<*psig_nid> to the NID of the digest used
+by the peer to sign TLS messages. It is implemented as a macro.
+
+SSL_get_peer_signature_type_nid() sets B<*psigtype_nid> to the signature
+type used by the peer to sign TLS messages. Currently the signature type
+is the NID of the public key type used for signing except for PSS signing
+where it is B<EVP_PKEY_RSA_PSS>. To differentiate between
+B<rsa_pss_rsae_*> and B<rsa_pss_pss_*> signatures, it's necessary to check
+the type of public key in the peer's certificate.
+
+SSL_get_signature_nid() and SSL_get_signature_type_nid() return the equivalent
+information for the local end of the connection.
+
+=head1 RETURN VALUES
+
+These functions return 1 for success and 0 for failure. There are several
+possible reasons for failure: the cipher suite has no signature (e.g. it
+uses RSA key exchange or is anonymous), the TLS version is below 1.2 or
+the functions were called too early, e.g. before the peer signed a message.
+
+=head1 SEE ALSO
+
+L<ssl(7)>, L<SSL_get_peer_certificate(3)>,
+
+=head1 COPYRIGHT
+
+Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut