Add Ed25519 and Ed448 from RFC 8032

3 files changed, 633 insertions, 0 deletions

diff --git a/crypto/test/UnitTests.csproj b/crypto/test/UnitTests.csproj
index 8a72f148b..5f0e7af57 100644
--- a/crypto/test/UnitTests.csproj
+++ b/crypto/test/UnitTests.csproj
@@ -325,6 +325,8 @@
     <Compile Include="src\math\ec\custom\sec\test\SecP384R1FieldTest.cs" />
     <Compile Include="src\math\ec\rfc7748\test\X25519Test.cs" />
     <Compile Include="src\math\ec\rfc7748\test\X448Test.cs" />
+    <Compile Include="src\math\ec\rfc8032\test\Ed25519Test.cs" />
+    <Compile Include="src\math\ec\rfc8032\test\Ed448Test.cs" />
     <Compile Include="src\math\ec\test\AllTests.cs" />
     <Compile Include="src\math\ec\test\ECAlgorithmsTest.cs" />
     <Compile Include="src\math\ec\test\ECPointPerformanceTest.cs" />
diff --git a/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs b/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs
new file mode 100644
index 000000000..43ea23988
--- /dev/null
+++ b/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs
@@ -0,0 +1,231 @@
+using System;
+
+using NUnit.Framework;
+
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
+{
+    [TestFixture]
+    public class Ed25519Test
+    {
+		private static readonly SecureRandom Random = new SecureRandom();
+      
+		[SetUp]
+        public void SetUp()
+        {
+            Ed25519.Precompute();
+        }
+
+		[Test]
+        public void TestEd25519Consistency()
+        {
+            byte[] sk = new byte[Ed25519.SecretKeySize];
+            byte[] pk = new byte[Ed25519.PublicKeySize];
+            byte[] m = new byte[255];
+            byte[] sig1 = new byte[Ed25519.SignatureSize];
+			byte[] sig2 = new byte[Ed25519.SignatureSize];
+
+			Random.NextBytes(m);
+
+            for (int i = 0; i < 10; ++i)
+            {
+				Random.NextBytes(sk);
+                Ed25519.GeneratePublicKey(sk, 0, pk, 0);
+
+                int mLen = Random.Next() & 255;
+
+                Ed25519.Sign(sk, 0, m, 0, mLen, sig1, 0);
+                Ed25519.Sign(sk, 0, pk, 0, m, 0, mLen, sig2, 0);
+
+                Assert.IsTrue(Arrays.AreEqual(sig1, sig2), "Consistent signatures #" + i);
+
+                bool shouldVerify = Ed25519.Verify(sig1, 0, pk, 0, m, 0, mLen);
+
+                Assert.IsTrue(shouldVerify, "Consistent sign/verify #" + i);
+
+                sig1[Ed25519.PublicKeySize - 1] ^= 0x80;
+                bool shouldNotVerify = Ed25519.Verify(sig1, 0, pk, 0, m, 0, mLen);
+
+                Assert.IsFalse(shouldNotVerify, "Consistent verification failure #" + i);
+            }
+        }
+
+        [Test]
+		public void TestEd25519Vector1()
+        {
+            CheckEd25519Vector(
+                ("9d61b19deffd5a60ba844af492ec2cc4"
+                + "4449c5697b326919703bac031cae7f60"),
+                ("d75a980182b10ab7d54bfed3c964073a"
+                + "0ee172f3daa62325af021a68f707511a"),
+                "",
+                ("e5564300c360ac729086e2cc806e828a"
+                + "84877f1eb8e5d974d873e06522490155"
+                + "5fb8821590a33bacc61e39701cf9b46b"
+                + "d25bf5f0595bbe24655141438e7a100b"),
+                "Ed25519 Vector #1");
+        }
+      
+		[Test]
+        public void TestEd25519Vector2()
+        {
+            CheckEd25519Vector(
+                ("4ccd089b28ff96da9db6c346ec114e0f"
+                + "5b8a319f35aba624da8cf6ed4fb8a6fb"),
+                ("3d4017c3e843895a92b70aa74d1b7ebc"
+                + "9c982ccf2ec4968cc0cd55f12af4660c"),
+                "72",
+                ("92a009a9f0d4cab8720e820b5f642540"
+                + "a2b27b5416503f8fb3762223ebdb69da"
+                + "085ac1e43e15996e458f3613d0f11d8c"
+                + "387b2eaeb4302aeeb00d291612bb0c00"),
+                "Ed25519 Vector #2");
+        }
+      
+		[Test]
+        public void TestEd25519Vector3()
+        {
+            CheckEd25519Vector(
+                ("c5aa8df43f9f837bedb7442f31dcb7b1"
+                + "66d38535076f094b85ce3a2e0b4458f7"),
+                ("fc51cd8e6218a1a38da47ed00230f058"
+                + "0816ed13ba3303ac5deb911548908025"),
+                "af82",
+                ("6291d657deec24024827e69c3abe01a3"
+                + "0ce548a284743a445e3680d7db5ac3ac"
+                + "18ff9b538d16f290ae67f760984dc659"
+                + "4a7c15e9716ed28dc027beceea1ec40a"),
+                "Ed25519 Vector #3");
+        }
+
+        [Test]
+        public void TestEd25519Vector1023()
+        {
+            string m =
+                "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";
+
+            CheckEd25519Vector(
+                ("f5e5767cf153319517630f226876b86c"
+                + "8160cc583bc013744c6bf255f5cc0ee5"),
+                ("278117fc144c72340f67d0f2316e8386"
+                + "ceffbf2b2428c9c51fef7c597f1d426e"),
+                m,
+                ("0aab4c900501b3e24d7cdf4663326a3a"
+                + "87df5e4843b2cbdb67cbf6e460fec350"
+                + "aa5371b1508f9f4528ecea23c436d94b"
+                + "5e8fcd4f681e30a6ac00a9704a188a03"),
+                "Ed25519 Vector #1023");
+        }
+
+        [Test]
+        public void TestEd25519VectorSHAabc()
+        {
+            CheckEd25519Vector(
+                ("833fe62409237b9d62ec77587520911e"
+                + "9a759cec1d19755b7da901b96dca3d42"),
+                ("ec172b93ad5e563bf4932c70e1245034"
+                + "c35467ef2efd4d64ebf819683467e2bf"),
+                ("ddaf35a193617abacc417349ae204131"
+                + "12e6fa4e89a97ea20a9eeee64b55d39a"
+                + "2192992a274fc1a836ba3c23a3feebbd"
+                + "454d4423643ce80e2a9ac94fa54ca49f"),
+                ("dc2a4459e7369633a52b1bf277839a00"
+                + "201009a3efbf3ecb69bea2186c26b589"
+                + "09351fc9ac90b3ecfdfbc7c66431e030"
+                + "3dca179c138ac17ad9bef1177331a704"),
+                "Ed25519 Vector SHA(abc)");
+        }
+      
+        private static void CheckEd25519Vector(string sSK, string sPK, string sM, string sSig, string text)
+        {
+            byte[] sk = Hex.Decode(sSK);
+
+            byte[] pk = Hex.Decode(sPK);
+            byte[] pkGen = new byte[Ed25519.PublicKeySize];
+            Ed25519.GeneratePublicKey(sk, 0, pkGen, 0);
+            Assert.IsTrue(Arrays.AreEqual(pk, pkGen), text);
+         
+			byte[] m = Hex.Decode(sM);
+            byte[] sig = Hex.Decode(sSig);
+            byte[] sigGen = new byte[Ed25519.SignatureSize];
+            Ed25519.Sign(sk, 0, m, 0, m.Length, sigGen, 0);
+            Assert.IsTrue(Arrays.AreEqual(sig, sigGen), text);
+
+            Ed25519.Sign(sk, 0, pk, 0, m, 0, m.Length, sigGen, 0);
+            Assert.IsTrue(Arrays.AreEqual(sig, sigGen), text);
+
+            bool shouldVerify = Ed25519.Verify(sig, 0, pk, 0, m, 0, m.Length);
+            Assert.IsTrue(shouldVerify, text);
+
+			sig[Ed25519.SignatureSize - 1] ^= 0x80;
+            bool shouldNotVerify = Ed25519.Verify(sig, 0, pk, 0, m, 0, m.Length);
+            Assert.IsFalse(shouldNotVerify, text);
+        }
+    }
+}
diff --git a/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs b/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs
new file mode 100644
index 000000000..98c487c09
--- /dev/null
+++ b/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs
@@ -0,0 +1,400 @@
+using System;
+
+using NUnit.Framework;
+
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
+{
+    [TestFixture]
+    public class Ed448Test
+    {
+        private static readonly SecureRandom Random = new SecureRandom();
+
+        [SetUp]
+        public void SetUp()
+        {
+            Ed448.Precompute();
+        }
+
+        [Test]
+        public void TestEd448Consistency()
+        {
+            byte[] sk = new byte[Ed448.SecretKeySize];
+            byte[] pk = new byte[Ed448.PublicKeySize];
+            byte[] ctx = new byte[Random.Next() & 7];
+            byte[] m = new byte[255];
+            byte[] sig1 = new byte[Ed448.SignatureSize];
+            byte[] sig2 = new byte[Ed448.SignatureSize];
+
+            Random.NextBytes(ctx);
+            Random.NextBytes(m);
+
+            for (int i = 0; i < 10; ++i)
+            {
+                Random.NextBytes(sk);
+                Ed448.GeneratePublicKey(sk, 0, pk, 0);
+
+                int mLen = Random.Next() & 255;
+
+                Ed448.Sign(sk, 0, ctx, m, 0, mLen, sig1, 0);
+                Ed448.Sign(sk, 0, pk, 0, ctx, m, 0, mLen, sig2, 0);
+
+                Assert.IsTrue(Arrays.AreEqual(sig1, sig2), "Consistent signatures #" + i);
+
+                bool shouldVerify = Ed448.Verify(sig1, 0, pk, 0, ctx, m, 0, mLen);
+
+                Assert.IsTrue(shouldVerify, "Consistent sign/verify #" + i);
+
+                sig1[Ed448.PublicKeySize - 1] ^= 0x80;
+                bool shouldNotVerify = Ed448.Verify(sig1, 0, pk, 0, ctx, m, 0, mLen);
+
+                Assert.IsFalse(shouldNotVerify, "Consistent verification failure #" + i);
+            }
+        }
+
+        [Test]
+        public void TestEd448Vector1()
+        {
+            CheckEd448Vector(
+                ( "6c82a562cb808d10d632be89c8513ebf"
+                + "6c929f34ddfa8c9f63c9960ef6e348a3"
+                + "528c8a3fcc2f044e39a3fc5b94492f8f"
+                + "032e7549a20098f95b"),
+                ( "5fd7449b59b461fd2ce787ec616ad46a"
+                + "1da1342485a70e1f8a0ea75d80e96778"
+                + "edf124769b46c7061bd6783df1e50f6c"
+                + "d1fa1abeafe8256180"),
+                "",
+                "",
+                ( "533a37f6bbe457251f023c0d88f976ae"
+                + "2dfb504a843e34d2074fd823d41a591f"
+                + "2b233f034f628281f2fd7a22ddd47d78"
+                + "28c59bd0a21bfd3980ff0d2028d4b18a"
+                + "9df63e006c5d1c2d345b925d8dc00b41"
+                + "04852db99ac5c7cdda8530a113a0f4db"
+                + "b61149f05a7363268c71d95808ff2e65"
+                + "2600"),
+                "Ed448 Vector #1");
+        }
+
+        [Test]
+        public void TestEd448Vector2()
+        {
+            CheckEd448Vector(
+                ( "c4eab05d357007c632f3dbb48489924d"
+                + "552b08fe0c353a0d4a1f00acda2c463a"
+                + "fbea67c5e8d2877c5e3bc397a659949e"
+                + "f8021e954e0a12274e"),
+                ( "43ba28f430cdff456ae531545f7ecd0a"
+                + "c834a55d9358c0372bfa0c6c6798c086"
+                + "6aea01eb00742802b8438ea4cb82169c"
+                + "235160627b4c3a9480"),
+                "03",
+                "",
+                ( "26b8f91727bd62897af15e41eb43c377"
+                + "efb9c610d48f2335cb0bd0087810f435"
+                + "2541b143c4b981b7e18f62de8ccdf633"
+                + "fc1bf037ab7cd779805e0dbcc0aae1cb"
+                + "cee1afb2e027df36bc04dcecbf154336"
+                + "c19f0af7e0a6472905e799f1953d2a0f"
+                + "f3348ab21aa4adafd1d234441cf807c0"
+                + "3a00"),
+                "Ed448 Vector #2");
+        }
+
+        [Test]
+        public void TestEd448Vector3()
+        {
+            CheckEd448Vector(
+                ( "c4eab05d357007c632f3dbb48489924d"
+                + "552b08fe0c353a0d4a1f00acda2c463a"
+                + "fbea67c5e8d2877c5e3bc397a659949e"
+                + "f8021e954e0a12274e"),
+                ( "43ba28f430cdff456ae531545f7ecd0a"
+                + "c834a55d9358c0372bfa0c6c6798c086"
+                + "6aea01eb00742802b8438ea4cb82169c"
+                + "235160627b4c3a9480"),
+                "03",
+                "666f6f",
+                ( "d4f8f6131770dd46f40867d6fd5d5055"
+                + "de43541f8c5e35abbcd001b32a89f7d2"
+                + "151f7647f11d8ca2ae279fb842d60721"
+                + "7fce6e042f6815ea000c85741de5c8da"
+                + "1144a6a1aba7f96de42505d7a7298524"
+                + "fda538fccbbb754f578c1cad10d54d0d"
+                + "5428407e85dcbc98a49155c13764e66c"
+                + "3c00"),
+                "Ed448 Vector #3");
+        }
+
+        [Test]
+        public void TestEd448Vector4()
+        {
+            CheckEd448Vector(
+                ( "cd23d24f714274e744343237b93290f5"
+                + "11f6425f98e64459ff203e8985083ffd"
+                + "f60500553abc0e05cd02184bdb89c4cc"
+                + "d67e187951267eb328"),
+                ( "dcea9e78f35a1bf3499a831b10b86c90"
+                + "aac01cd84b67a0109b55a36e9328b1e3"
+                + "65fce161d71ce7131a543ea4cb5f7e9f"
+                + "1d8b00696447001400"),
+                "0c3e544074ec63b0265e0c",
+                "",
+                ( "1f0a8888ce25e8d458a21130879b840a"
+                + "9089d999aaba039eaf3e3afa090a09d3"
+                + "89dba82c4ff2ae8ac5cdfb7c55e94d5d"
+                + "961a29fe0109941e00b8dbdeea6d3b05"
+                + "1068df7254c0cdc129cbe62db2dc957d"
+                + "bb47b51fd3f213fb8698f064774250a5"
+                + "028961c9bf8ffd973fe5d5c206492b14"
+                + "0e00"),
+                "Ed448 Vector #4");
+        }
+
+        [Test]
+        public void TestEd448Vector5()
+        {
+            CheckEd448Vector(
+                ( "258cdd4ada32ed9c9ff54e63756ae582"
+                + "fb8fab2ac721f2c8e676a72768513d93"
+                + "9f63dddb55609133f29adf86ec9929dc"
+                + "cb52c1c5fd2ff7e21b"),
+                ( "3ba16da0c6f2cc1f30187740756f5e79"
+                + "8d6bc5fc015d7c63cc9510ee3fd44adc"
+                + "24d8e968b6e46e6f94d19b945361726b"
+                + "d75e149ef09817f580"),
+                "64a65f3cdedcdd66811e2915",
+                "",
+                ( "7eeeab7c4e50fb799b418ee5e3197ff6"
+                + "bf15d43a14c34389b59dd1a7b1b85b4a"
+                + "e90438aca634bea45e3a2695f1270f07"
+                + "fdcdf7c62b8efeaf00b45c2c96ba457e"
+                + "b1a8bf075a3db28e5c24f6b923ed4ad7"
+                + "47c3c9e03c7079efb87cb110d3a99861"
+                + "e72003cbae6d6b8b827e4e6c143064ff"
+                + "3c00"),
+                "Ed448 Vector #5");
+        }
+
+        [Test]
+        public void TestEd448Vector6()
+        {
+            CheckEd448Vector(
+                ( "7ef4e84544236752fbb56b8f31a23a10"
+                + "e42814f5f55ca037cdcc11c64c9a3b29"
+                + "49c1bb60700314611732a6c2fea98eeb"
+                + "c0266a11a93970100e"),
+                ( "b3da079b0aa493a5772029f0467baebe"
+                + "e5a8112d9d3a22532361da294f7bb381"
+                + "5c5dc59e176b4d9f381ca0938e13c6c0"
+                + "7b174be65dfa578e80"),
+                "64a65f3cdedcdd66811e2915e7",
+                "",
+                ( "6a12066f55331b6c22acd5d5bfc5d712"
+                + "28fbda80ae8dec26bdd306743c5027cb"
+                + "4890810c162c027468675ecf645a8317"
+                + "6c0d7323a2ccde2d80efe5a1268e8aca"
+                + "1d6fbc194d3f77c44986eb4ab4177919"
+                + "ad8bec33eb47bbb5fc6e28196fd1caf5"
+                + "6b4e7e0ba5519234d047155ac727a105"
+                + "3100"),
+                "Ed448 Vector #6");
+        }
+
+        [Test]
+        public void TestEd448Vector64()
+        {
+            string m =
+                "bd0f6a3747cd561bdddf4640a332461a" +
+                "4a30a12a434cd0bf40d766d9c6d458e5" +
+                "512204a30c17d1f50b5079631f64eb31" +
+                "12182da3005835461113718d1a5ef944";
+
+            CheckEd448Vector(
+                ( "d65df341ad13e008567688baedda8e9d"
+                + "cdc17dc024974ea5b4227b6530e339bf"
+                + "f21f99e68ca6968f3cca6dfe0fb9f4fa"
+                + "b4fa135d5542ea3f01"),
+                ( "df9705f58edbab802c7f8363cfe5560a"
+                + "b1c6132c20a9f1dd163483a26f8ac53a"
+                + "39d6808bf4a1dfbd261b099bb03b3fb5"
+                + "0906cb28bd8a081f00"),
+                m,
+                "",
+                ( "554bc2480860b49eab8532d2a533b7d5"
+                + "78ef473eeb58c98bb2d0e1ce488a98b1"
+                + "8dfde9b9b90775e67f47d4a1c3482058"
+                + "efc9f40d2ca033a0801b63d45b3b722e"
+                + "f552bad3b4ccb667da350192b61c508c"
+                + "f7b6b5adadc2c8d9a446ef003fb05cba"
+                + "5f30e88e36ec2703b349ca229c267083"
+                + "3900"),
+                "Ed448 Vector #64");
+        }
+
+        [Test]
+        public void TestEd448Vector256()
+        {
+            string m =
+                "15777532b0bdd0d1389f636c5f6b9ba7" +
+                "34c90af572877e2d272dd078aa1e567c" +
+                "fa80e12928bb542330e8409f31745041" +
+                "07ecd5efac61ae7504dabe2a602ede89" +
+                "e5cca6257a7c77e27a702b3ae39fc769" +
+                "fc54f2395ae6a1178cab4738e543072f" +
+                "c1c177fe71e92e25bf03e4ecb72f47b6" +
+                "4d0465aaea4c7fad372536c8ba516a60" +
+                "39c3c2a39f0e4d832be432dfa9a706a6" +
+                "e5c7e19f397964ca4258002f7c0541b5" +
+                "90316dbc5622b6b2a6fe7a4abffd9610" +
+                "5eca76ea7b98816af0748c10df048ce0" +
+                "12d901015a51f189f3888145c03650aa" +
+                "23ce894c3bd889e030d565071c59f409" +
+                "a9981b51878fd6fc110624dcbcde0bf7" +
+                "a69ccce38fabdf86f3bef6044819de11";
+
+            CheckEd448Vector(
+                ( "2ec5fe3c17045abdb136a5e6a913e32a"
+                + "b75ae68b53d2fc149b77e504132d3756"
+                + "9b7e766ba74a19bd6162343a21c8590a"
+                + "a9cebca9014c636df5"),
+                ( "79756f014dcfe2079f5dd9e718be4171"
+                + "e2ef2486a08f25186f6bff43a9936b9b"
+                + "fe12402b08ae65798a3d81e22e9ec80e"
+                + "7690862ef3d4ed3a00"),
+                m,
+                "",
+                ( "c650ddbb0601c19ca11439e1640dd931"
+                + "f43c518ea5bea70d3dcde5f4191fe53f"
+                + "00cf966546b72bcc7d58be2b9badef28"
+                + "743954e3a44a23f880e8d4f1cfce2d7a"
+                + "61452d26da05896f0a50da66a239a8a1"
+                + "88b6d825b3305ad77b73fbac0836ecc6"
+                + "0987fd08527c1a8e80d5823e65cafe2a"
+                + "3d00"),
+                "Ed448 Vector #256");
+        }
+
+        [Test]
+        public void TestEd448Vector1023()
+        {
+            string m =
+                "6ddf802e1aae4986935f7f981ba3f035" +
+                "1d6273c0a0c22c9c0e8339168e675412" +
+                "a3debfaf435ed651558007db4384b650" +
+                "fcc07e3b586a27a4f7a00ac8a6fec2cd" +
+                "86ae4bf1570c41e6a40c931db27b2faa" +
+                "15a8cedd52cff7362c4e6e23daec0fbc" +
+                "3a79b6806e316efcc7b68119bf46bc76" +
+                "a26067a53f296dafdbdc11c77f7777e9" +
+                "72660cf4b6a9b369a6665f02e0cc9b6e" +
+                "dfad136b4fabe723d2813db3136cfde9" +
+                "b6d044322fee2947952e031b73ab5c60" +
+                "3349b307bdc27bc6cb8b8bbd7bd32321" +
+                "9b8033a581b59eadebb09b3c4f3d2277" +
+                "d4f0343624acc817804728b25ab79717" +
+                "2b4c5c21a22f9c7839d64300232eb66e" +
+                "53f31c723fa37fe387c7d3e50bdf9813" +
+                "a30e5bb12cf4cd930c40cfb4e1fc6225" +
+                "92a49588794494d56d24ea4b40c89fc0" +
+                "596cc9ebb961c8cb10adde976a5d602b" +
+                "1c3f85b9b9a001ed3c6a4d3b1437f520" +
+                "96cd1956d042a597d561a596ecd3d173" +
+                "5a8d570ea0ec27225a2c4aaff26306d1" +
+                "526c1af3ca6d9cf5a2c98f47e1c46db9" +
+                "a33234cfd4d81f2c98538a09ebe76998" +
+                "d0d8fd25997c7d255c6d66ece6fa56f1" +
+                "1144950f027795e653008f4bd7ca2dee" +
+                "85d8e90f3dc315130ce2a00375a318c7" +
+                "c3d97be2c8ce5b6db41a6254ff264fa6" +
+                "155baee3b0773c0f497c573f19bb4f42" +
+                "40281f0b1f4f7be857a4e59d416c06b4" +
+                "c50fa09e1810ddc6b1467baeac5a3668" +
+                "d11b6ecaa901440016f389f80acc4db9" +
+                "77025e7f5924388c7e340a732e554440" +
+                "e76570f8dd71b7d640b3450d1fd5f041" +
+                "0a18f9a3494f707c717b79b4bf75c984" +
+                "00b096b21653b5d217cf3565c9597456" +
+                "f70703497a078763829bc01bb1cbc8fa" +
+                "04eadc9a6e3f6699587a9e75c94e5bab" +
+                "0036e0b2e711392cff0047d0d6b05bd2" +
+                "a588bc109718954259f1d86678a579a3" +
+                "120f19cfb2963f177aeb70f2d4844826" +
+                "262e51b80271272068ef5b3856fa8535" +
+                "aa2a88b2d41f2a0e2fda7624c2850272" +
+                "ac4a2f561f8f2f7a318bfd5caf969614" +
+                "9e4ac824ad3460538fdc25421beec2cc" +
+                "6818162d06bbed0c40a387192349db67" +
+                "a118bada6cd5ab0140ee273204f628aa" +
+                "d1c135f770279a651e24d8c14d75a605" +
+                "9d76b96a6fd857def5e0b354b27ab937" +
+                "a5815d16b5fae407ff18222c6d1ed263" +
+                "be68c95f32d908bd895cd76207ae7264" +
+                "87567f9a67dad79abec316f683b17f2d" +
+                "02bf07e0ac8b5bc6162cf94697b3c27c" +
+                "d1fea49b27f23ba2901871962506520c" +
+                "392da8b6ad0d99f7013fbc06c2c17a56" +
+                "9500c8a7696481c1cd33e9b14e40b82e" +
+                "79a5f5db82571ba97bae3ad3e0479515" +
+                "bb0e2b0f3bfcd1fd33034efc6245eddd" +
+                "7ee2086ddae2600d8ca73e214e8c2b0b" +
+                "db2b047c6a464a562ed77b73d2d841c4" +
+                "b34973551257713b753632efba348169" +
+                "abc90a68f42611a40126d7cb21b58695" +
+                "568186f7e569d2ff0f9e745d0487dd2e" +
+                "b997cafc5abf9dd102e62ff66cba87";
+
+            CheckEd448Vector(
+                ( "872d093780f5d3730df7c212664b37b8"
+                + "a0f24f56810daa8382cd4fa3f77634ec"
+                + "44dc54f1c2ed9bea86fafb7632d8be19"
+                + "9ea165f5ad55dd9ce8"),
+                ( "a81b2e8a70a5ac94ffdbcc9badfc3feb"
+                + "0801f258578bb114ad44ece1ec0e799d"
+                + "a08effb81c5d685c0c56f64eecaef8cd"
+                + "f11cc38737838cf400"),
+                m,
+                "",
+                ( "e301345a41a39a4d72fff8df69c98075"
+                + "a0cc082b802fc9b2b6bc503f926b65bd"
+                + "df7f4c8f1cb49f6396afc8a70abe6d8a"
+                + "ef0db478d4c6b2970076c6a0484fe76d"
+                + "76b3a97625d79f1ce240e7c576750d29"
+                + "5528286f719b413de9ada3e8eb78ed57"
+                + "3603ce30d8bb761785dc30dbc320869e"
+                + "1a00"),
+                "Ed448 Vector #1023");
+        }
+
+        private static void CheckEd448Vector(string sSK, string sPK, string sM, string sCTX, string sSig, string text)
+        {
+            byte[] sk = Hex.Decode(sSK);
+
+            byte[] pk = Hex.Decode(sPK);
+            byte[] pkGen = new byte[Ed448.PublicKeySize];
+            Ed448.GeneratePublicKey(sk, 0, pkGen, 0);
+            Assert.IsTrue(Arrays.AreEqual(pk, pkGen), text);
+
+            byte[] m = Hex.Decode(sM);
+            byte[] ctx = Hex.Decode(sCTX);
+            byte[] sig = Hex.Decode(sSig);
+            byte[] sigGen = new byte[Ed448.SignatureSize];
+            Ed448.Sign(sk, 0, ctx, m, 0, m.Length, sigGen, 0);
+            Assert.IsTrue(Arrays.AreEqual(sig, sigGen), text);
+
+            Ed448.Sign(sk, 0, pk, 0, ctx, m, 0, m.Length, sigGen, 0);
+            Assert.IsTrue(Arrays.AreEqual(sig, sigGen), text);
+
+            bool shouldVerify = Ed448.Verify(sig, 0, pk, 0, ctx, m, 0, m.Length);
+            Assert.IsTrue(shouldVerify, text);
+
+            sig[Ed448.SignatureSize - 1] ^= 0x80;
+            bool shouldNotVerify = Ed448.Verify(sig, 0, pk, 0, ctx, m, 0, m.Length);
+            Assert.IsFalse(shouldNotVerify, text);
+        }
+    }
+}