{
EVP_PKEY_ASN1_METHOD tmp = { 0, };
+ /*
+ * One of the following must be true:
+ *
+ * pem_str == NULL AND ASN1_PKEY_ALIAS is set
+ * pem_str != NULL AND ASN1_PKEY_ALIAS is clear
+ *
+ * Anything else is an error and may lead to a corrupt ASN1 method table
+ */
+ if (!((ameth->pem_str == NULL
+ && (ameth->pkey_flags & ASN1_PKEY_ALIAS) != 0)
+ || (ameth->pem_str != NULL
+ && (ameth->pkey_flags & ASN1_PKEY_ALIAS) == 0))) {
+ EVPerr(EVP_F_EVP_PKEY_ASN1_ADD0, ERR_R_PASSED_INVALID_ARGUMENT);
+ return 0;
+ }
+
if (app_methods == NULL) {
app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
if (app_methods == NULL)