Add access to siphash-2-4 (no dirty scheduler necessary).

c_src/enacl_nif.c

@@ -661,6 +661,16 @@ ERL_NIF_TERM enif_crypto_auth_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM co
 	return enif_make_int64(env, crypto_auth_KEYBYTES);
 }
 
+static
+ERL_NIF_TERM enif_crypto_shorthash_BYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
+	return enif_make_int64(env, crypto_shorthash_BYTES);
+}
+
+static
+ERL_NIF_TERM enif_crypto_shorthash_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
+	return enif_make_int64(env, crypto_shorthash_KEYBYTES);
+}
+
 static
 ERL_NIF_TERM enif_crypto_onetimeauth_BYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
 	return enif_make_int64(env, crypto_onetimeauth_BYTES);
@@ -850,6 +860,30 @@ ERL_NIF_TERM enif_crypto_auth_verify(ErlNifEnv *env, int argc, ERL_NIF_TERM cons
 	}
 }
 
+static
+ERL_NIF_TERM enif_crypto_shorthash(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
+	ErlNifBinary a,m,k;
+
+	if (
+	  (argc != 2) ||
+	  (!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
+	  (!enif_inspect_binary(env, argv[1], &k))) {
+		return enif_make_badarg(env);
+	}
+
+	if (k.size != crypto_shorthash_KEYBYTES) {
+		return enif_make_badarg(env);
+	}
+
+	if (!enif_alloc_binary(crypto_shorthash_BYTES, &a)) {
+		return nacl_error_tuple(env, "alloc_failed");
+	}
+
+	crypto_shorthash(a.data, m.data, m.size, k.data);
+
+	return enif_make_binary(env, &a);
+}
+
 static
 ERL_NIF_TERM enif_crypto_onetimeauth(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
 	ErlNifBinary a,m,k;
@@ -1051,6 +1085,10 @@ static ErlNifFunc nif_funcs[] = {
 	{"crypto_auth_verify_b", 3, enif_crypto_auth_verify},
 	{"crypto_auth_verify", 3, enif_crypto_auth_verify, ERL_NIF_DIRTY_JOB_CPU_BOUND},
 
+  {"crypto_shorthash_BYTES", 0, enif_crypto_auth_BYTES},
+  {"crypto_shorthash_KEYBYTES", 0, enif_crypto_shorthash_KEYBYTES},
+  {"crypto_shorthash", 2, enif_crypto_shorthash},
+
 	{"crypto_onetimeauth_BYTES", 0, enif_crypto_onetimeauth_BYTES},
 	{"crypto_onetimeauth_KEYBYTES", 0, enif_crypto_onetimeauth_KEYBYTES},
 	{"crypto_onetimeauth_b", 2, enif_crypto_onetimeauth},