EVP_PKT_SIGN
ret = EVP_PK_RSA|EVP_PKT_SIGN|EVP_PKT_ENC;
ret = EVP_PK_DSA|EVP_PKT_SIGN;
ret = EVP_PK_EC|EVP_PKT_SIGN|EVP_PKT_EXCH;
ret = EVP_PKT_EXCH|EVP_PKT_SIGN;
if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_SIGN)) {
if (!(type & EVP_PKT_SIGN)) {