From 059019253686db6b0b43815303791911a0df70cf Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Mon, 25 Apr 2016 13:03:26 +0200
Subject: [PATCH] add testcase for ed25519

---
 tests.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 1 deletion(-)

diff --git a/tests.c b/tests.c
index 10d259835e..085b2d0cc1 100644
--- a/tests.c
+++ b/tests.c
@@ -41,10 +41,11 @@
 #include "curves.h"
 #include "secp256k1.h"
 #include "nist256p1.h"
+#include "ed25519.h"
 
 uint8_t *fromhex(const char *str)
 {
-	static uint8_t buf[128];
+	static uint8_t buf[256];
 	uint8_t c;
 	size_t i;
 	for (i = 0; i < strlen(str) / 2; i++) {
@@ -1714,6 +1715,58 @@ START_TEST(test_scalar_point_mult) {
 }
 END_TEST
 
+START_TEST(test_ed25519) {
+	// test vectors from https://github.com/torproject/tor/blob/master/src/test/ed25519_vectors.inc
+	static const char *vectors[] = {
+		"26c76712d89d906e6672dafa614c42e5cb1caac8c6568e4d2493087db51f0d36", // secret
+		"c2247870536a192d142d056abefca68d6193158e7c1a59c1654c954eccaff894", // public
+		"d23188eac3773a316d46006fa59c095060be8b1a23582a0dd99002a82a0662bd246d8449e172e04c5f46ac0d1404cebe4aabd8a75a1457aa06cae41f3334f104", // selfsig
+		"fba7a5366b5cb98c2667a18783f5cf8f4f8d1a2ce939ad22a6e685edde85128d",
+		"1519a3b15816a1aafab0b213892026ebf5c0dc232c58b21088d88cb90e9b940d",
+		"3a785ac1201c97ee5f6f0d99323960d5f264c7825e61aa7cc81262f15bef75eb4fa5723add9b9d45b12311b6d403eb3ac79ff8e4e631fc3cd51e4ad2185b200b",
+		"67e3aa7a14fac8445d15e45e38a523481a69ae35513c9e4143eb1c2196729a0e",
+		"081faa81992e360ea22c06af1aba096e7a73f1c665bc8b3e4e531c46455fd1dd",
+		"cf431fd0416bfbd20c9d95ef9b723e2acddffb33900edc72195dea95965d52d888d30b7b8a677c0bd8ae1417b1e1a0ec6700deadd5d8b54b6689275e04a04509",
+		"d51385942033a76dc17f089a59e6a5a7fe80d9c526ae8ddd8c3a506b99d3d0a6",
+		"73cfa1189a723aad7966137cbffa35140bb40d7e16eae4c40b79b5f0360dd65a",
+		"2375380cd72d1a6c642aeddff862be8a5804b916acb72c02d9ed052c1561881aa658a5af856fcd6d43113e42f698cd6687c99efeef7f2ce045824440d26c5d00",
+		"5c8eac469bb3f1b85bc7cd893f52dc42a9ab66f1b02b5ce6a68e9b175d3bb433",
+		"66c1a77104d86461b6f98f73acf3cd229c80624495d2d74d6fda1e940080a96b",
+		"2385a472f599ca965bbe4d610e391cdeabeba9c336694b0d6249e551458280be122c2441dd9746a81bbfb9cd619364bab0df37ff4ceb7aefd24469c39d3bc508",
+		"eda433d483059b6d1ff8b7cfbd0fe406bfb23722c8f3c8252629284573b61b86",
+		"d21c294db0e64cb2d8976625786ede1d9754186ae8197a64d72f68c792eecc19",
+		"e500cd0b8cfff35442f88008d894f3a2fa26ef7d3a0ca5714ae0d3e2d40caae58ba7cdf69dd126994dad6be536fcda846d89dd8138d1683cc144c8853dce7607",
+		"4377c40431c30883c5fbd9bc92ae48d1ed8a47b81d13806beac5351739b5533d",
+		"c4d58b4cf85a348ff3d410dd936fa460c4f18da962c01b1963792b9dcc8a6ea6",
+		"d187b9e334b0050154de10bf69b3e4208a584e1a65015ec28b14bcc252cf84b8baa9c94867daa60f2a82d09ba9652d41e8dde292b624afc8d2c26441b95e3c0e",
+		"c6bbcce615839756aed2cc78b1de13884dd3618f48367a17597a16c1cd7a290b",
+		"95126f14d86494020665face03f2d42ee2b312a85bc729903eb17522954a1c4a",
+		"815213640a643d198bd056e02bba74e1c8d2d931643e84497adf3347eb485079c9afe0afce9284cdc084946b561abbb214f1304ca11228ff82702185cf28f60d",
+		0,
+		0,
+		0,
+	};
+	const char **ssk, **spk, **ssig;
+	ssk = vectors;
+	spk = vectors + 1;
+	ssig = vectors + 2;
+	ed25519_public_key pk;
+	ed25519_secret_key sk;
+	ed25519_signature sig;
+	while (*ssk && *spk && *ssig) {
+		memcpy(sk, fromhex(*ssk), 32);
+		ed25519_publickey(sk, pk);
+		ck_assert_mem_eq(pk, fromhex(*spk), 32);
+		ed25519_sign(pk, 32, sk, pk, sig);
+		ck_assert_mem_eq(sig, fromhex(*ssig), 64);
+		ssk += 3;
+		spk += 3;
+		ssig += 3;
+	}
+}
+END_TEST
+
+
 // define test suite and cases
 Suite *test_suite(void)
 {
@@ -1807,6 +1860,11 @@ Suite *test_suite(void)
 	tc = tcase_create("scalar_point_mult");
 	tcase_add_test(tc, test_scalar_point_mult);
 	suite_add_tcase(s, tc);
+
+	tc = tcase_create("ed25519");
+	tcase_add_test(tc, test_ed25519);
+	suite_add_tcase(s, tc);
+
 	return s;
 }