Add test vectors for Ed25519.

bramble-core/src/test/java/org/briarproject/bramble/crypto/EdSignatureTest.java

 package org.briarproject.bramble.crypto;
 
 import org.briarproject.bramble.api.crypto.KeyPair;
+import org.junit.Test;
 
 import java.security.GeneralSecurityException;
 
+import static org.briarproject.bramble.util.StringUtils.fromHexString;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertTrue;
+
 public class EdSignatureTest extends SignatureTest {
 
+	// Test vectors from RFC 8032: secret key, public key, message, signature
+	// https://tools.ietf.org/html/rfc8032#section-7.1
+	private static final String[][] TEST_VECTORS = {{
+			"9d61b19deffd5a60ba844af492ec2cc4" +
+					"4449c5697b326919703bac031cae7f60",
+			"d75a980182b10ab7d54bfed3c964073a" +
+					"0ee172f3daa62325af021a68f707511a",
+			"",
+			"e5564300c360ac729086e2cc806e828a" +
+					"84877f1eb8e5d974d873e06522490155" +
+					"5fb8821590a33bacc61e39701cf9b46b" +
+					"d25bf5f0595bbe24655141438e7a100b"
+	}, {
+			"4ccd089b28ff96da9db6c346ec114e0f" +
+					"5b8a319f35aba624da8cf6ed4fb8a6fb",
+			"3d4017c3e843895a92b70aa74d1b7ebc" +
+					"9c982ccf2ec4968cc0cd55f12af4660c",
+			"72",
+			"92a009a9f0d4cab8720e820b5f642540" +
+					"a2b27b5416503f8fb3762223ebdb69da" +
+					"085ac1e43e15996e458f3613d0f11d8c" +
+					"387b2eaeb4302aeeb00d291612bb0c00"
+	}, {
+			"c5aa8df43f9f837bedb7442f31dcb7b1" +
+					"66d38535076f094b85ce3a2e0b4458f7",
+			"fc51cd8e6218a1a38da47ed00230f058" +
+					"0816ed13ba3303ac5deb911548908025",
+			"af82",
+			"6291d657deec24024827e69c3abe01a3" +
+					"0ce548a284743a445e3680d7db5ac3ac" +
+					"18ff9b538d16f290ae67f760984dc659" +
+					"4a7c15e9716ed28dc027beceea1ec40a"
+	}, {
+			"f5e5767cf153319517630f226876b86c" +
+					"8160cc583bc013744c6bf255f5cc0ee5",
+			"278117fc144c72340f67d0f2316e8386" +
+					"ceffbf2b2428c9c51fef7c597f1d426e",
+			"08b8b2b733424243760fe426a4b54908" +
+					"632110a66c2f6591eabd3345e3e4eb98" +
+					"fa6e264bf09efe12ee50f8f54e9f77b1" +
+					"e355f6c50544e23fb1433ddf73be84d8" +
+					"79de7c0046dc4996d9e773f4bc9efe57" +
+					"38829adb26c81b37c93a1b270b20329d" +
+					"658675fc6ea534e0810a4432826bf58c" +
+					"941efb65d57a338bbd2e26640f89ffbc" +
+					"1a858efcb8550ee3a5e1998bd177e93a" +
+					"7363c344fe6b199ee5d02e82d522c4fe" +
+					"ba15452f80288a821a579116ec6dad2b" +
+					"3b310da903401aa62100ab5d1a36553e" +
+					"06203b33890cc9b832f79ef80560ccb9" +
+					"a39ce767967ed628c6ad573cb116dbef" +
+					"efd75499da96bd68a8a97b928a8bbc10" +
+					"3b6621fcde2beca1231d206be6cd9ec7" +
+					"aff6f6c94fcd7204ed3455c68c83f4a4" +
+					"1da4af2b74ef5c53f1d8ac70bdcb7ed1" +
+					"85ce81bd84359d44254d95629e9855a9" +
+					"4a7c1958d1f8ada5d0532ed8a5aa3fb2" +
+					"d17ba70eb6248e594e1a2297acbbb39d" +
+					"502f1a8c6eb6f1ce22b3de1a1f40cc24" +
+					"554119a831a9aad6079cad88425de6bd" +
+					"e1a9187ebb6092cf67bf2b13fd65f270" +
+					"88d78b7e883c8759d2c4f5c65adb7553" +
+					"878ad575f9fad878e80a0c9ba63bcbcc" +
+					"2732e69485bbc9c90bfbd62481d9089b" +
+					"eccf80cfe2df16a2cf65bd92dd597b07" +
+					"07e0917af48bbb75fed413d238f5555a" +
+					"7a569d80c3414a8d0859dc65a46128ba" +
+					"b27af87a71314f318c782b23ebfe808b" +
+					"82b0ce26401d2e22f04d83d1255dc51a" +
+					"ddd3b75a2b1ae0784504df543af8969b" +
+					"e3ea7082ff7fc9888c144da2af58429e" +
+					"c96031dbcad3dad9af0dcbaaaf268cb8" +
+					"fcffead94f3c7ca495e056a9b47acdb7" +
+					"51fb73e666c6c655ade8297297d07ad1" +
+					"ba5e43f1bca32301651339e22904cc8c" +
+					"42f58c30c04aafdb038dda0847dd988d" +
+					"cda6f3bfd15c4b4c4525004aa06eeff8" +
+					"ca61783aacec57fb3d1f92b0fe2fd1a8" +
+					"5f6724517b65e614ad6808d6f6ee34df" +
+					"f7310fdc82aebfd904b01e1dc54b2927" +
+					"094b2db68d6f903b68401adebf5a7e08" +
+					"d78ff4ef5d63653a65040cf9bfd4aca7" +
+					"984a74d37145986780fc0b16ac451649" +
+					"de6188a7dbdf191f64b5fc5e2ab47b57" +
+					"f7f7276cd419c17a3ca8e1b939ae49e4" +
+					"88acba6b965610b5480109c8b17b80e1" +
+					"b7b750dfc7598d5d5011fd2dcc5600a3" +
+					"2ef5b52a1ecc820e308aa342721aac09" +
+					"43bf6686b64b2579376504ccc493d97e" +
+					"6aed3fb0f9cd71a43dd497f01f17c0e2" +
+					"cb3797aa2a2f256656168e6c496afc5f" +
+					"b93246f6b1116398a346f1a641f3b041" +
+					"e989f7914f90cc2c7fff357876e506b5" +
+					"0d334ba77c225bc307ba537152f3f161" +
+					"0e4eafe595f6d9d90d11faa933a15ef1" +
+					"369546868a7f3a45a96768d40fd9d034" +
+					"12c091c6315cf4fde7cb68606937380d" +
+					"b2eaaa707b4c4185c32eddcdd306705e" +
+					"4dc1ffc872eeee475a64dfac86aba41c" +
+					"0618983f8741c5ef68d3a101e8a3b8ca" +
+					"c60c905c15fc910840b94c00a0b9d0",
+			"0aab4c900501b3e24d7cdf4663326a3a" +
+					"87df5e4843b2cbdb67cbf6e460fec350" +
+					"aa5371b1508f9f4528ecea23c436d94b" +
+					"5e8fcd4f681e30a6ac00a9704a188a03"
+	}, {
+			"833fe62409237b9d62ec77587520911e" +
+					"9a759cec1d19755b7da901b96dca3d42",
+			"ec172b93ad5e563bf4932c70e1245034" +
+					"c35467ef2efd4d64ebf819683467e2bf",
+			"ddaf35a193617abacc417349ae204131" +
+					"12e6fa4e89a97ea20a9eeee64b55d39a" +
+					"2192992a274fc1a836ba3c23a3feebbd" +
+					"454d4423643ce80e2a9ac94fa54ca49f",
+			"dc2a4459e7369633a52b1bf277839a00" +
+					"201009a3efbf3ecb69bea2186c26b589" +
+					"09351fc9ac90b3ecfdfbc7c66431e030" +
+					"3dca179c138ac17ad9bef1177331a704"
+	}};
+
 	@Override
 	protected KeyPair generateKeyPair() {
 		return crypto.generateEdKeyPair();
@@ -22,4 +147,23 @@ public class EdSignatureTest extends SignatureTest {
 			byte[] signature) throws GeneralSecurityException {
 		return crypto.verifyEd(label, signedData, publicKey, signature);
 	}
+
+	@Test
+	public void testRfc8032TestVectors() throws Exception {
+		for (String[] vector : TEST_VECTORS) {
+			byte[] privateKeyBytes = fromHexString(vector[0]);
+			byte[] publicKeyBytes = fromHexString(vector[1]);
+			byte[] messageBytes = fromHexString(vector[2]);
+			byte[] signatureBytes = fromHexString(vector[3]);
+
+			EdSignature signature = new EdSignature();
+			signature.initSign(new EdPrivateKey(privateKeyBytes));
+			signature.update(messageBytes);
+			assertArrayEquals(signatureBytes, signature.sign());
+
+			signature.initVerify(new EdPublicKey(publicKeyBytes));
+			signature.update(messageBytes);
+			assertTrue(signature.verify(signatureBytes));
+		}
+	}
 }
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