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SSL_get_signature_nid.3
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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_signature_nid, SSL_get_peer_signature_type_nid, SSL_get_signature_nid, SSL_get_signature_type_nid \- get TLS message signing types .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_get_peer_signature_nid()\fR sets \fB*psig_nid\fR to the \s-1NID\s0 of the digest used by the peer to sign \s-1TLS\s0 messages. It is implemented as a macro. .PP \&\fBSSL_get_peer_signature_type_nid()\fR sets \fB*psigtype_nid\fR to the signature type used by the peer to sign \s-1TLS\s0 messages. Currently the signature type is the \s-1NID\s0 of the public key type used for signing except for \s-1PSS\s0 signing where it is \fB\s-1EVP_PKEY_RSA_PSS\s0\fR. To differentiate between \&\fBrsa_pss_rsae_*\fR and \fBrsa_pss_pss_*\fR signatures, it's necessary to check the type of public key in the peer's certificate. .PP \&\fBSSL_get_signature_nid()\fR and \fBSSL_get_signature_type_nid()\fR return the equivalent information for the local end of the connection. .SH "RETURN VALUES" .IX Header "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 \s-1RSA\s0 key exchange or is anonymous), the \s-1TLS\s0 version is below 1.2 or the functions were called too early, e.g. before the peer signed a message. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\|(7), \fBSSL_get_peer_certificate\fR\|(3), .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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