EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN) {
EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN, 0, plen)