3 files changed, 169 insertions, 0 deletions
diff --git a/crypto/test/UnitTests.csproj b/crypto/test/UnitTests.csproj
index bd7ad5787..e9e0b3f4e 100644
--- a/crypto/test/UnitTests.csproj
+++ b/crypto/test/UnitTests.csproj
@@ -256,6 +256,7 @@
     <Compile Include="src\crypto\test\SHA512HMacTest.cs" />
     <Compile Include="src\crypto\test\SHA512t224DigestTest.cs" />
     <Compile Include="src\crypto\test\SHA512t256DigestTest.cs" />
+    <Compile Include="src\crypto\test\SM2EngineTest.cs" />
     <Compile Include="src\crypto\test\SM2KeyExchangeTest.cs" />
     <Compile Include="src\crypto\test\SM2SignerTest.cs" />
     <Compile Include="src\crypto\test\SM3DigestTest.cs" />
diff --git a/crypto/test/src/crypto/test/RegressionTest.cs b/crypto/test/src/crypto/test/RegressionTest.cs
index bc857b5d0..c065a1320 100644
--- a/crypto/test/src/crypto/test/RegressionTest.cs
+++ b/crypto/test/src/crypto/test/RegressionTest.cs
@@ -128,6 +128,7 @@ namespace Org.BouncyCastle.Crypto.Tests
             new X931SignerTest(),
             new KeccakDigestTest(),
             new ShakeDigestTest(),
+            new SM2EngineTest(),
             new SM2KeyExchangeTest(),
             new SM2SignerTest(),
         };
diff --git a/crypto/test/src/crypto/test/SM2EngineTest.cs b/crypto/test/src/crypto/test/SM2EngineTest.cs
new file mode 100644
index 000000000..8a1987d52
--- /dev/null
+++ b/crypto/test/src/crypto/test/SM2EngineTest.cs
@@ -0,0 +1,167 @@
+using System;
+
+using NUnit.Framework;
+
+using Org.BouncyCastle.Crypto.Engines;
+using Org.BouncyCastle.Crypto.Generators;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Math.EC;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Encoders;
+using Org.BouncyCastle.Utilities.Test;
+
+namespace Org.BouncyCastle.Crypto.Tests
+{
+    [TestFixture]
+    public class SM2EngineTest
+        : SimpleTest
+    {
+        public override string Name
+        {
+            get { return "SM2Engine"; }
+        }
+
+        private void DoEngineTestFp()
+        {
+            BigInteger SM2_ECC_P = new BigInteger("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3", 16);
+            BigInteger SM2_ECC_A = new BigInteger("787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498", 16);
+            BigInteger SM2_ECC_B = new BigInteger("63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A", 16);
+            BigInteger SM2_ECC_N = new BigInteger("8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7", 16);
+            BigInteger SM2_ECC_GX = new BigInteger("421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D", 16);
+            BigInteger SM2_ECC_GY = new BigInteger("0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2", 16);
+
+            ECCurve curve = new FpCurve(SM2_ECC_P, SM2_ECC_A, SM2_ECC_B);
+
+            ECPoint g = curve.CreatePoint(SM2_ECC_GX, SM2_ECC_GY);
+            ECDomainParameters domainParams = new ECDomainParameters(curve, g, SM2_ECC_N);
+
+            ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
+
+            ECKeyGenerationParameters aKeyGenParams = new ECKeyGenerationParameters(domainParams, new TestRandomBigInteger("1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0", 16));
+
+            keyPairGenerator.Init(aKeyGenParams);
+
+            AsymmetricCipherKeyPair aKp = keyPairGenerator.GenerateKeyPair();
+
+            ECPublicKeyParameters aPub = (ECPublicKeyParameters)aKp.Public;
+            ECPrivateKeyParameters aPriv = (ECPrivateKeyParameters)aKp.Private;
+
+            SM2Engine sm2Engine = new SM2Engine();
+
+            byte[] m = Strings.ToByteArray("encryption standard");
+
+            sm2Engine.Init(true, new ParametersWithRandom(aPub, new TestRandomBigInteger("4C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F", 16)));
+
+            byte[] enc = sm2Engine.ProcessBlock(m, 0, m.Length);
+
+            IsTrue("enc wrong", Arrays.AreEqual(Hex.Decode(
+                "04245C26 FB68B1DD DDB12C4B 6BF9F2B6 D5FE60A3 83B0D18D 1C4144AB F17F6252" +
+                "E776CB92 64C2A7E8 8E52B199 03FDC473 78F605E3 6811F5C0 7423A24B 84400F01" +
+                "B8650053 A89B41C4 18B0C3AA D00D886C 00286467 9C3D7360 C30156FA B7C80A02" +
+                "76712DA9 D8094A63 4B766D3A 285E0748 0653426D"), enc));
+
+            sm2Engine.Init(false, aPriv);
+
+            byte[] dec = sm2Engine.ProcessBlock(enc, 0, enc.Length);
+
+            IsTrue("dec wrong", Arrays.AreEqual(m, dec));
+
+            enc[80] = (byte)(enc[80] + 1);
+
+            try
+            {
+                sm2Engine.ProcessBlock(enc, 0, enc.Length);
+                Fail("no exception");
+            }
+            catch (InvalidCipherTextException e)
+            {
+                IsTrue("wrong exception", "invalid cipher text".Equals(e.Message));
+            }
+
+            // long message
+            sm2Engine = new SM2Engine();
+
+            m = new byte[4097];
+            for (int i = 0; i != m.Length; i++)
+            {
+                m[i] = (byte)i;
+            }
+
+            sm2Engine.Init(true, new ParametersWithRandom(aPub, new TestRandomBigInteger("4C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F", 16)));
+
+            enc = sm2Engine.ProcessBlock(m, 0, m.Length);
+
+            sm2Engine.Init(false, aPriv);
+
+            dec = sm2Engine.ProcessBlock(enc, 0, enc.Length);
+
+            IsTrue("dec wrong", Arrays.AreEqual(m, dec));
+        }
+
+        private void DoEngineTestF2m()
+        {
+            BigInteger SM2_ECC_A = new BigInteger("00", 16);
+            BigInteger SM2_ECC_B = new BigInteger("E78BCD09746C202378A7E72B12BCE00266B9627ECB0B5A25367AD1AD4CC6242B", 16);
+            BigInteger SM2_ECC_N = new BigInteger("7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBC972CF7E6B6F900945B3C6A0CF6161D", 16);
+            BigInteger SM2_ECC_GX = new BigInteger("00CDB9CA7F1E6B0441F658343F4B10297C0EF9B6491082400A62E7A7485735FADD", 16);
+            BigInteger SM2_ECC_GY = new BigInteger("013DE74DA65951C4D76DC89220D5F7777A611B1C38BAE260B175951DC8060C2B3E", 16);
+            BigInteger SM2_ECC_H = BigInteger.ValueOf(4);
+
+            ECCurve curve = new F2mCurve(257, 12, SM2_ECC_A, SM2_ECC_B);
+
+            ECPoint g = curve.CreatePoint(SM2_ECC_GX, SM2_ECC_GY);
+            ECDomainParameters domainParams = new ECDomainParameters(curve, g, SM2_ECC_N, SM2_ECC_H);
+
+            ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
+
+            ECKeyGenerationParameters aKeyGenParams = new ECKeyGenerationParameters(domainParams, new TestRandomBigInteger("56A270D17377AA9A367CFA82E46FA5267713A9B91101D0777B07FCE018C757EB", 16));
+
+            keyPairGenerator.Init(aKeyGenParams);
+
+            AsymmetricCipherKeyPair aKp = keyPairGenerator.GenerateKeyPair();
+
+            ECPublicKeyParameters aPub = (ECPublicKeyParameters)aKp.Public;
+            ECPrivateKeyParameters aPriv = (ECPrivateKeyParameters)aKp.Private;
+
+            SM2Engine sm2Engine = new SM2Engine();
+
+            byte[] m = Strings.ToByteArray("encryption standard");
+
+            sm2Engine.Init(true, new ParametersWithRandom(aPub, new TestRandomBigInteger("6D3B497153E3E92524E5C122682DBDC8705062E20B917A5F8FCDB8EE4C66663D", 16)));
+
+            byte[] enc = sm2Engine.ProcessBlock(m, 0, m.Length);
+
+            IsTrue("f2m enc wrong", Arrays.AreEqual(Hex.Decode(
+                "04019D23 6DDB3050 09AD52C5 1BB93270 9BD534D4 76FBB7B0 DF9542A8 A4D890A3" +
+                    "F2E100B2 3B938DC0 A94D1DF8 F42CF45D 2D6601BF 638C3D7D E75A29F0 2AFB7E45" +
+                    "E91771FD 55AC6213 C2A8A040 E4CAB5B2 6A9CFCDA 737373A4 8625D375 8FA37B3E" +
+                    "AB80E9CF CABA665E 3199EA15 A1FA8189 D96F5791 25E4"), enc));
+
+            sm2Engine.Init(false, aPriv);
+
+            byte[] dec = sm2Engine.ProcessBlock(enc, 0, enc.Length);
+
+            IsTrue("f2m dec wrong", Arrays.AreEqual(m, dec));
+        }
+
+        public override void PerformTest()
+        {
+            DoEngineTestFp();
+            DoEngineTestF2m();
+        }
+
+        public static void Main(string[] args)
+        {
+            RunTest(new SM2EngineTest());
+        }
+
+        [Test]
+        public void TestFunction()
+        {
+            string resultText = Perform().ToString();
+
+            Assert.AreEqual(Name + ": Okay", resultText);
+        }
+    }
+}