A RSA cipher can only be chosen, when a RSA certificate is available.
RSA export ciphers with a keylength of 512 bits for the RSA key require
a temporary 512 bit RSA key, as typically the supplied key has a length
-of 1024 bit. RSA ciphers using EDH need a certificate and key and
-additional DH-parameters.
+of 1024 bit (see
+L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>).
+RSA ciphers using EDH need a certificate and key and additional DH-parameters.
A DSA cipher can only be chosen, when a DSA certificate is available.
DSA ciphers always use DH key exchange and therefore need DH-parameters.
L<ssl(3)|ssl(3)>, L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>,
L<SSL_CTX_use_certificate(3)|SSL_CTX_use_certificate(3)>,
+L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>,
+L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>,
L<ciphers(1)|ciphers(1)>
=cut
=item SSL_OP_SINGLE_DH_USE
-Always create a new key when using temporary DH parameters.
+Always create a new key when using temporary DH parameters
+(see L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>).
=item SSL_OP_EPHEMERAL_RSA
-Also use the temporary RSA key when doing RSA operations.
+Also use ephemeral (temporary) RSA key when doing RSA operations
+(see L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>).
=item SSL_OP_PKCS1_CHECK_1
=head1 SEE ALSO
-L<ssl(3)|ssl(3)>, L<SSL_new(3)|SSL_new(3)>, L<SSL_clear(3)|SSL_clear(3)>
+L<ssl(3)|ssl(3)>, L<SSL_new(3)|SSL_new(3)>, L<SSL_clear(3)|SSL_clear(3)>,
+L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>,
+L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>
=head1 HISTORY
L<SSL_CTX_set_session_id_context(3)|SSL_CTX_set_session_id_context(3)>,
L<SSL_CTX_set_ssl_version(3)|SSL_CTX_set_ssl_version(3)>,
L<SSL_CTX_set_timeout(3)|SSL_CTX_set_timeout(3)>,
+L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>,
+L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>,
L<SSL_CTX_set_verify(3)|SSL_CTX_set_verify(3)>,
L<SSL_CTX_use_certificate(3)|SSL_CTX_use_certificate(3)>,
L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>,