EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
EVP_SignUpdate(&ctx,buf,(unsigned int)n);
EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
EVP_SignUpdate(&ctx,buf,(unsigned int)n);