We no longer need SHA-512 for the
Ed25519 test vectors, since we now
generate EdDSA/Blake2b test vectors with the Donna implementation.
/// Utilities ///
/////////////////
-// By default, EdDSA signatures use blake2b. SHA-512 is provided as
-// an option for full ed25519 compatibility (a must for test vectors).
-// Compile with option -DED25519_SHA512 to use with sha512. If you do
-// so, you must provide the "sha512" header with suitable functions.
+// By default, EdDSA signatures use blake2b. SHA-512 is provided as an
+// option for full ed25519 compatibility. To use with SHA-512, compile
+// with option -DED25519_SHA512 and provide the "sha512" header.
#ifdef ED25519_SHA512
#include "sha512.h"
#define HASH crypto_sha512