>>This should be possible via configuration, not just explicit API >>calls from applications that go to the extra trouble. How is it possible via configuration? I have seen in s3_clnt.c, openssl check for server dh prime size against a hardcoded value /if ((!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 768) || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 512)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_DH_KEY_TOO_SMALL); goto f_err; } / Why it is not possible to initialize the compared constant key size via some public method? -- View this message in context: http://openssl.6102.n7.nabble.com/How-to-enforce-DH-field-size-in-the-client-tp60442p60480.html Sent from the OpenSSL - User mailing list archive at Nabble.com.