+/* The following PAD options are also currently ignored in 1.0.0, digest
+ * parameters are handled through EVP_DigestSign*() and EVP_DigestVerify*()
+ * instead.
+ */
+#define EVP_MD_CTX_FLAG_PAD_MASK 0xF0 /* RSA mode to use */
+#define EVP_MD_CTX_FLAG_PAD_PKCS1 0x00 /* PKCS#1 v1.5 mode */
+#define EVP_MD_CTX_FLAG_PAD_X931 0x10 /* X9.31 mode */
+#define EVP_MD_CTX_FLAG_PAD_PSS 0x20 /* PSS mode */