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SM2&SM3&SM4 C#实现分析

2016-03-30

【摘要】 本文主要讲解“国密加密算法”SM系列的C 实现方法,不涉及具体的算法剖析,在网络上找到的java实现方法比较少,切在跨语言加密解密上会存在一些问题,所以整理此文志之。JAVA实现参考http: blog csdn

【摘要】

本文主要讲解“国密加密算法”SM系列的C#实现方法,不涉及具体的算法剖析,在网络上找到的java实现方法比较少,切在跨语言加密解密上会存在一些问题,所以整理此文志之。1.SM2 & SM3

由于SM2算法中需要使用SM3摘要算法,所以把他们放在一起

项目目录结构如下:

\

首先要下载一个dll包——BouncyCastle.Crypto.dll,并将此dll引用到项目中。实现代码如下(每个工具类都有Main可以运行测试):

a.SM2主类

【SM2.cs】

using System;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
using System.Text;

namespace Com.Mlq.SM
{
	
	public class SM2
	{
		public static SM2 Instance
		{
			get
			{
				return new SM2();
			}
			
		}
		public static SM2 InstanceTest
		{
			get
			{
				return new SM2();
			}
			
		}

        public static readonly string[] sm2_param = {
			"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF",// p,0
			"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC",// a,1
			"28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93",// b,2
			"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123",// n,3
			"32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7",// gx,4
			"BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0" // gy,5
	    };

        public string[] ecc_param = sm2_param;
		
		public readonly BigInteger ecc_p;
		public readonly BigInteger ecc_a;
		public readonly BigInteger ecc_b;
		public readonly BigInteger ecc_n;
		public readonly BigInteger ecc_gx;
		public readonly BigInteger ecc_gy;
		
		public readonly ECCurve ecc_curve;
		public readonly ECPoint ecc_point_g;
		
		public readonly ECDomainParameters ecc_bc_spec;
		
		public readonly ECKeyPairGenerator ecc_key_pair_generator;

        private SM2()
		{
			ecc_param = sm2_param;

            ECFieldElement ecc_gx_fieldelement;
			ECFieldElement ecc_gy_fieldelement;
			
			ecc_p = new BigInteger(ecc_param[0], 16);
			ecc_a = new BigInteger(ecc_param[1], 16);
			ecc_b = new BigInteger(ecc_param[2], 16);
			ecc_n = new BigInteger(ecc_param[3], 16);
			ecc_gx = new BigInteger(ecc_param[4], 16);
			ecc_gy = new BigInteger(ecc_param[5], 16);


            ecc_gx_fieldelement = new FpFieldElement(ecc_p, ecc_gx);
            ecc_gy_fieldelement = new FpFieldElement(ecc_p, ecc_gy);

            ecc_curve = new FpCurve(ecc_p, ecc_a, ecc_b);
            ecc_point_g = new FpPoint(ecc_curve, ecc_gx_fieldelement, ecc_gy_fieldelement);
			
			ecc_bc_spec = new ECDomainParameters(ecc_curve, ecc_point_g, ecc_n);
			
			ECKeyGenerationParameters ecc_ecgenparam;
            ecc_ecgenparam = new ECKeyGenerationParameters(ecc_bc_spec, new SecureRandom());
			
			ecc_key_pair_generator = new ECKeyPairGenerator();
			ecc_key_pair_generator.Init(ecc_ecgenparam);
		}

        public virtual byte[] Sm2GetZ(byte[] userId, ECPoint userKey)
		{
			SM3Digest sm3 = new SM3Digest();
			byte[] p;
			// userId length
			int len = userId.Length * 8;
			sm3.Update((byte) (len >> 8 & 0x00ff));
			sm3.Update((byte) (len & 0x00ff));
			
			// userId
            sm3.BlockUpdate(userId, 0, userId.Length);
			
			// a,b
			p = ecc_a.ToByteArray();
            sm3.BlockUpdate(p, 0, p.Length);
            p = ecc_b.ToByteArray();
            sm3.BlockUpdate(p, 0, p.Length);
			// gx,gy
            p = ecc_gx.ToByteArray();
            sm3.BlockUpdate(p, 0, p.Length);
            p = ecc_gy.ToByteArray();
            sm3.BlockUpdate(p, 0, p.Length);
			
			// x,y
            p = userKey.X.ToBigInteger().ToByteArray();
            sm3.BlockUpdate(p, 0, p.Length);
            p = userKey.Y.ToBigInteger().ToByteArray();
            sm3.BlockUpdate(p, 0, p.Length);
			
			// Z
			byte[] md = new byte[sm3.GetDigestSize()];
			sm3.DoFinal(md, 0);
			
			return md;
		}
		
	}
}

b.SM2工具类

【SM2Utils.cs】

using Com.Mlq.SM;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Utilities.Encoders;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Com.Mlq.SM
{
    class SM2Utils
    {
        public static void GenerateKeyPair()
        {
            SM2 sm2 = SM2.Instance;
            AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.GenerateKeyPair();  
            ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.Private;  
            ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.Public;  
            BigInteger privateKey = ecpriv.D;  
            ECPoint publicKey = ecpub.Q;

            System.Console.Out.WriteLine("公钥: " + Encoding.Default.GetString(Hex.Encode(publicKey.GetEncoded())).ToUpper());
            System.Console.Out.WriteLine("私钥: " + Encoding.Default.GetString(Hex.Encode(privateKey.ToByteArray())).ToUpper());  
        }

        public static String Encrypt(byte[] publicKey,byte[] data)
        {
            if (null == publicKey || publicKey.Length == 0)
            {
                return null;
            }
            if (data == null || data.Length == 0)
            {
                return null;
            }

            byte[] source = new byte[data.Length];
            Array.Copy(data, 0, source, 0, data.Length);

            Cipher cipher = new Cipher();
            SM2 sm2 = SM2.Instance;

            ECPoint userKey = sm2.ecc_curve.DecodePoint(publicKey);

            ECPoint c1 = cipher.Init_enc(sm2, userKey);
            cipher.Encrypt(source);

            byte[] c3 = new byte[32];
            cipher.Dofinal(c3);

            String sc1 = Encoding.Default.GetString(Hex.Encode(c1.GetEncoded()));
            String sc2 = Encoding.Default.GetString(Hex.Encode(source));
            String sc3 = Encoding.Default.GetString(Hex.Encode(c3));

            return (sc1 + sc2 + sc3).ToUpper();
        }

        public static byte[] Decrypt(byte[] privateKey, byte[] encryptedData)
        {
            if (null == privateKey || privateKey.Length == 0)
            {
                return null;
            }
            if (encryptedData == null || encryptedData.Length == 0)
            {
                return null;
            }

            String data = Encoding.Default.GetString(Hex.Encode(encryptedData));

            byte[] c1Bytes = Hex.Decode(Encoding.Default.GetBytes(data.Substring(0 , 130)));
            int c2Len = encryptedData.Length - 97;
            byte[] c2 = Hex.Decode(Encoding.Default.GetBytes(data.Substring(130 , 2 * c2Len)));
            byte[] c3 = Hex.Decode(Encoding.Default.GetBytes(data.Substring(130 + 2 * c2Len , 64)));

            SM2 sm2 = SM2.Instance;
            BigInteger userD = new BigInteger(1, privateKey);

            ECPoint c1 = sm2.ecc_curve.DecodePoint(c1Bytes);
            Cipher cipher = new Cipher();
            cipher.Init_dec(userD, c1);
            cipher.Decrypt(c2);
            cipher.Dofinal(c3);

            return c2;
        }

        //[STAThread]
        //public static void Main()
        //{
        //    GenerateKeyPair();

        //    String plainText = "ererfeiisgod";
        //    byte[] sourceData = Encoding.Default.GetBytes(plainText);

        //    //下面的秘钥可以使用generateKeyPair()生成的秘钥内容  
        //    // 国密规范正式私钥  
        //    String prik = "3690655E33D5EA3D9A4AE1A1ADD766FDEA045CDEAA43A9206FB8C430CEFE0D94";
        //    // 国密规范正式公钥  
        //    String pubk = "04F6E0C3345AE42B51E06BF50B98834988D54EBC7460FE135A48171BC0629EAE205EEDE253A530608178A98F1E19BB737302813BA39ED3FA3C51639D7A20C7391A";

        //    System.Console.Out.WriteLine("加密: ");
        //    String cipherText = SM2Utils.Encrypt(Hex.Decode(pubk), sourceData);
        //    System.Console.Out.WriteLine(cipherText);
        //    System.Console.Out.WriteLine("解密: ");
        //    plainText = Encoding.Default.GetString(SM2Utils.Decrypt(Hex.Decode(prik), Hex.Decode(cipherText)));
        //    System.Console.Out.WriteLine(plainText);

        //    Console.ReadLine();
        //}
    }
}

c.SM3工具类

【SM3Digest.cs】

using System;
using Org.BouncyCastle.Utilities.Encoders;
using System.Text;
using Org.BouncyCastle.Crypto;

namespace Com.Mlq.SM
{
    public abstract class GeneralDigest : IDigest
    {
        private const int BYTE_LENGTH = 64;

        private byte[] xBuf;
        private int xBufOff;

        private long byteCount;

        internal GeneralDigest()
        {
            xBuf = new byte[4];
        }

        internal GeneralDigest(GeneralDigest t)
        {
            xBuf = new byte[t.xBuf.Length];
            Array.Copy(t.xBuf, 0, xBuf, 0, t.xBuf.Length);

            xBufOff = t.xBufOff;
            byteCount = t.byteCount;
        }

        public void Update(byte input)
        {
            xBuf[xBufOff++] = input;

            if (xBufOff == xBuf.Length)
            {
                ProcessWord(xBuf, 0);
                xBufOff = 0;
            }

            byteCount++;
        }

        public void BlockUpdate(
            byte[] input,
            int inOff,
            int length)
        {
            //
            // fill the current word
            //
            while ((xBufOff != 0) && (length > 0))
            {
                Update(input[inOff]);
                inOff++;
                length--;
            }

            //
            // process whole words.
            //
            while (length > xBuf.Length)
            {
                ProcessWord(input, inOff);

                inOff += xBuf.Length;
                length -= xBuf.Length;
                byteCount += xBuf.Length;
            }

            //
            // load in the remainder.
            //
            while (length > 0)
            {
                Update(input[inOff]);

                inOff++;
                length--;
            }
        }

        public void Finish()
        {
            long bitLength = (byteCount << 3);

            //
            // add the pad bytes.
            //
            Update(unchecked((byte)128));

            while (xBufOff != 0) Update(unchecked((byte)0));
            ProcessLength(bitLength);
            ProcessBlock();
        }

        public virtual void Reset()
        {
            byteCount = 0;
            xBufOff = 0;
            Array.Clear(xBuf, 0, xBuf.Length);
        }

        public int GetByteLength()
        {
            return BYTE_LENGTH;
        }

        internal abstract void ProcessWord(byte[] input, int inOff);
        internal abstract void ProcessLength(long bitLength);
        internal abstract void ProcessBlock();
        public abstract string AlgorithmName { get; }
        public abstract int GetDigestSize();
        public abstract int DoFinal(byte[] output, int outOff);
    }

    public class SupportClass
    {
        /// 
        /// Performs an unsigned bitwise right shift with the specified number
        /// 
        ///Number to operate on
        ///Ammount of bits to shift
        /// The resulting number from the shift operation
        public static int URShift(int number, int bits)
        {
            if (number >= 0)
                return number >> bits;
            else
                return (number >> bits) + (2 << ~bits);
        }

        /// 
        /// Performs an unsigned bitwise right shift with the specified number
        /// 
        ///Number to operate on
        ///Ammount of bits to shift
        /// The resulting number from the shift operation
        public static int URShift(int number, long bits)
        {
            return URShift(number, (int)bits);
        }

        /// 
        /// Performs an unsigned bitwise right shift with the specified number
        /// 
        ///Number to operate on
        ///Ammount of bits to shift
        /// The resulting number from the shift operation
        public static long URShift(long number, int bits)
        {
            if (number >= 0)
                return number >> bits;
            else
                return (number >> bits) + (2L << ~bits);
        }

        /// 
        /// Performs an unsigned bitwise right shift with the specified number
        /// 
        ///Number to operate on
        ///Ammount of bits to shift
        /// The resulting number from the shift operation
        public static long URShift(long number, long bits)
        {
            return URShift(number, (int)bits);
        }


    }

    public class SM3Digest : GeneralDigest
	{
        public override string AlgorithmName
		{
			get
			{
				return "SM3";
			}
			
		}
        public override int GetDigestSize()
        {
            return DIGEST_LENGTH;
        }
		
		private const int DIGEST_LENGTH = 32;
		
		private static readonly int[] v0 = new int[]{0x7380166f, 0x4914b2b9, 0x172442d7, unchecked((int) 0xda8a0600), unchecked((int) 0xa96f30bc), 0x163138aa, unchecked((int) 0xe38dee4d), unchecked((int) 0xb0fb0e4e)};
		
		private int[] v = new int[8];
		private int[] v_ = new int[8];
		
		private static readonly int[] X0 = new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
		
		private int[] X = new int[68];
		private int xOff;
		
		private int T_00_15 = 0x79cc4519;
		private int T_16_63 = 0x7a879d8a;
		
		public SM3Digest()
		{
			Reset();
		}
		
		public SM3Digest(SM3Digest t):base(t)
		{
			
			Array.Copy(t.X, 0, X, 0, t.X.Length);
			xOff = t.xOff;
			
			Array.Copy(t.v, 0, v, 0, t.v.Length);
		}
		
		public override void  Reset()
		{
			base.Reset();
			
			Array.Copy(v0, 0, v, 0, v0.Length);
			
			xOff = 0;
			Array.Copy(X0, 0, X, 0, X0.Length);
		}

        internal override void ProcessBlock()
		{
			int i;
			
			int[] ww = X;
			int[] ww_ = new int[64];
			
			for (i = 16; i < 68; i++)
			{
				ww[i] = P1(ww[i - 16] ^ ww[i - 9] ^ (ROTATE(ww[i - 3], 15))) ^ (ROTATE(ww[i - 13], 7)) ^ ww[i - 6];
			}
			
			for (i = 0; i < 64; i++)
			{
				ww_[i] = ww[i] ^ ww[i + 4];
			}
			
			int[] vv = v;
			int[] vv_ = v_;
			
			Array.Copy(vv, 0, vv_, 0, v0.Length);
			
			int SS1, SS2, TT1, TT2, aaa;
			for (i = 0; i < 16; i++)
			{
				aaa = ROTATE(vv_[0], 12);
				SS1 = aaa + vv_[4] + ROTATE(T_00_15, i);
				SS1 = ROTATE(SS1, 7);
				SS2 = SS1 ^ aaa;
				
				TT1 = FF_00_15(vv_[0], vv_[1], vv_[2]) + vv_[3] + SS2 + ww_[i];
				TT2 = GG_00_15(vv_[4], vv_[5], vv_[6]) + vv_[7] + SS1 + ww[i];
				vv_[3] = vv_[2];
				vv_[2] = ROTATE(vv_[1], 9);
				vv_[1] = vv_[0];
				vv_[0] = TT1;
				vv_[7] = vv_[6];
				vv_[6] = ROTATE(vv_[5], 19);
				vv_[5] = vv_[4];
				vv_[4] = P0(TT2);
			}
			for (i = 16; i < 64; i++)
			{
				aaa = ROTATE(vv_[0], 12);
				SS1 = aaa + vv_[4] + ROTATE(T_16_63, i);
				SS1 = ROTATE(SS1, 7);
				SS2 = SS1 ^ aaa;
				
				TT1 = FF_16_63(vv_[0], vv_[1], vv_[2]) + vv_[3] + SS2 + ww_[i];
				TT2 = GG_16_63(vv_[4], vv_[5], vv_[6]) + vv_[7] + SS1 + ww[i];
				vv_[3] = vv_[2];
				vv_[2] = ROTATE(vv_[1], 9);
				vv_[1] = vv_[0];
				vv_[0] = TT1;
				vv_[7] = vv_[6];
				vv_[6] = ROTATE(vv_[5], 19);
				vv_[5] = vv_[4];
				vv_[4] = P0(TT2);
			}
			for (i = 0; i < 8; i++)
			{
				vv[i] ^= vv_[i];
			}
			
			// Reset
			xOff = 0;
			Array.Copy(X0, 0, X, 0, X0.Length);
		}
		
		internal override void  ProcessWord(byte[] in_Renamed, int inOff)
		{
			int n = in_Renamed[inOff] << 24;
			n |= (in_Renamed[++inOff] & 0xff) << 16;
			n |= (in_Renamed[++inOff] & 0xff) << 8;
			n |= (in_Renamed[++inOff] & 0xff);
			X[xOff] = n;
			
			if (++xOff == 16)
			{
				ProcessBlock();
			}
		}

        internal override void ProcessLength(long bitLength)
		{
			if (xOff > 14)
			{
				ProcessBlock();
			}
			
			X[14] = (int) (SupportClass.URShift(bitLength, 32));
			X[15] = (int) (bitLength & unchecked((int) 0xffffffff));
		}
		
		public static void  IntToBigEndian(int n, byte[] bs, int off)
		{
			bs[off] = (byte) (SupportClass.URShift(n, 24));
			bs[++off] = (byte) (SupportClass.URShift(n, 16));
			bs[++off] = (byte) (SupportClass.URShift(n, 8));
			bs[++off] = (byte) (n);
		}

        public override int DoFinal(byte[] out_Renamed, int outOff)
		{
			Finish();
			
			for (int i = 0; i < 8; i++)
			{
				IntToBigEndian(v[i], out_Renamed, outOff + i * 4);
			}
			
			Reset();
			
			return DIGEST_LENGTH;
		}
		
		private int ROTATE(int x, int n)
		{
			return (x << n) | (SupportClass.URShift(x, (32 - n)));
		}
		
		private int P0(int X)
		{
			return ((X) ^ ROTATE((X), 9) ^ ROTATE((X), 17));
		}
		
		private int P1(int X)
		{
			return ((X) ^ ROTATE((X), 15) ^ ROTATE((X), 23));
		}
		
		private int FF_00_15(int X, int Y, int Z)
		{
			return (X ^ Y ^ Z);
		}
		
		private int FF_16_63(int X, int Y, int Z)
		{
			return ((X & Y) | (X & Z) | (Y & Z));
		}
		
		private int GG_00_15(int X, int Y, int Z)
		{
			return (X ^ Y ^ Z);
		}
		
		private int GG_16_63(int X, int Y, int Z)
		{
			return ((X & Y) | (~ X & Z));
		}
		
        //[STAThread]
        //public static void  Main()
        //{
        //    byte[] md = new byte[32];
        //    byte[] msg1 = Encoding.Default.GetBytes("ererfeiisgod");
        //    SM3Digest sm3 = new SM3Digest();
        //    sm3.BlockUpdate(msg1, 0, msg1.Length);
        //    sm3.DoFinal(md, 0);
        //    System.String s = new UTF8Encoding().GetString(Hex.Encode(md));
        //    System.Console.Out.WriteLine(s.ToUpper());
			
        //    Console.ReadLine();
        //}
	}
}

2.SM4

直接上代码:

a.SM4主类

【SM4.cs】

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Com.Mlq.SM
{
    class SM4
    {
        public const int SM4_ENCRYPT = 1;
	    public const int SM4_DECRYPT = 0;

	    private long GET_ULONG_BE(byte[] b, int i) 
	    {
		    long n = (long)(b[i] & 0xff) << 24 | (long)((b[i + 1] & 0xff) << 16) | (long)((b[i + 2] & 0xff) << 8) | (long)(b[i + 3] & 0xff) & 0xffffffffL;
		    return n;
	    }

	    private void PUT_ULONG_BE(long n, byte[] b, int i) 
	    {
		    b[i] = (byte)(int)(0xFF & n >> 24);
            b[i + 1] = (byte)(int)(0xFF & n >> 16);
            b[i + 2] = (byte)(int)(0xFF & n >> 8);
            b[i + 3] = (byte)(int)(0xFF & n);
	    }

	    private long SHL(long x, int n) 
	    {
		    return (x & 0xFFFFFFFF) << n;
	    }
	
	    private long ROTL(long x, int n) 
	    {
		    return SHL(x, n) | x >> (32 - n);
	    }
	
	    private void SWAP(long[] sk, int i)
	    {
		    long t = sk[i];
		    sk[i] = sk[(31 - i)];
		    sk[(31 - i)] = t;
	    }
	
	    public byte[] SboxTable = new byte[] { (byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe,
		    (byte) 0xcc, (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6,
		    0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b, 0x67,
		    (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3,
		    (byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06,
		    (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91,
		    (byte) 0xef, (byte) 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43,
		    (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4,
		    (byte) 0xb3, 0x1c, (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8,
		    (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94, (byte) 0xfa,
		    0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7,
		    (byte) 0xfc, (byte) 0xf3, 0x73, 0x17, (byte) 0xba, (byte) 0x83,
		    0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8,
		    0x68, 0x6b, (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda,
		    (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70, 0x56,
		    (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1,
		    (byte) 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, (byte) 0x87,
		    (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27,
		    0x52, 0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4,
		    (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf, (byte) 0x8a,
		    (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3,
		    (byte) 0xf7, (byte) 0xf2, (byte) 0xce, (byte) 0xf9, 0x61, 0x15,
		    (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4,
		    (byte) 0x9b, 0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32,
		    0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3, 0x1d,
		    (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca,
		    0x60, (byte) 0xc0, 0x29, 0x23, (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f,
		    (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd,
		    (byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b,
		    0x51, (byte) 0x8d, 0x1b, (byte) 0xaf, (byte) 0x92, (byte) 0xbb,
		    (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41,
		    0x1f, 0x10, 0x5a, (byte) 0xd8, 0x0a, (byte) 0xc1, 0x31,
		    (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d,
		    0x74, (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4,
		    (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a, 0x0c,
		    (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09,
		    (byte) 0xc5, 0x6e, (byte) 0xc6, (byte) 0x84, 0x18, (byte) 0xf0,
		    0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79,
		    (byte) 0xee, 0x5f, 0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48 };
	
	    public uint[] FK = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc };
	
	    public uint[] CK = { 0x00070e15,0x1c232a31,0x383f464d,0x545b6269,
		                                0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,
		                                0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,
		                                0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,
		                                0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,
		                                0x30373e45,0x4c535a61,0x686f767d,0x848b9299,
		                                0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,
		                                0x10171e25,0x2c333a41,0x484f565d,0x646b7279 };

	    private byte sm4Sbox(byte inch)
	    {
		    int i = inch & 0xFF;
		    byte retVal = SboxTable[i];
		    return retVal;
	    }

	    private long sm4Lt(long ka) 
	    {
		    long bb = 0L;
		    long c = 0L;
		    byte[] a = new byte[4];
		    byte[] b = new byte[4];
		    PUT_ULONG_BE(ka, a, 0);
		    b[0] = sm4Sbox(a[0]);
		    b[1] = sm4Sbox(a[1]);
		    b[2] = sm4Sbox(a[2]);
		    b[3] = sm4Sbox(a[3]);
		    bb = GET_ULONG_BE(b, 0);
		    c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
		    return c;
	    }

	    private long sm4F(long x0, long x1, long x2, long x3, long rk)
	    {
		    return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
	    }

	    private long sm4CalciRK(long ka) 
	    {
		    long bb = 0L;
		    long rk = 0L;
		    byte[] a = new byte[4];
		    byte[] b = new byte[4];
		    PUT_ULONG_BE(ka, a, 0);
		    b[0] = sm4Sbox(a[0]);
		    b[1] = sm4Sbox(a[1]);
		    b[2] = sm4Sbox(a[2]);
		    b[3] = sm4Sbox(a[3]);
		    bb = GET_ULONG_BE(b, 0);
		    rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
		    return rk;
	    }

	    private void sm4_setkey(long[] SK, byte[] key) 
	    {
		    long[] MK = new long[4];
		    long[] k = new long[36];
		    int i = 0;
		    MK[0] = GET_ULONG_BE(key, 0);
		    MK[1] = GET_ULONG_BE(key, 4);
		    MK[2] = GET_ULONG_BE(key, 8);
		    MK[3] = GET_ULONG_BE(key, 12);
		    k[0] = MK[0] ^ (long) FK[0];
		    k[1] = MK[1] ^ (long) FK[1];
		    k[2] = MK[2] ^ (long) FK[2];
		    k[3] = MK[3] ^ (long) FK[3];
		    for (; i < 32; i++) 
		    {
			    k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (long) CK[i]));
			    SK[i] = k[(i + 4)];
		    }
	    }

	    private void sm4_one_round(long[] sk, byte[] input, byte[] output) 
	    {
		    int i = 0;
		    long[] ulbuf = new long[36];
		    ulbuf[0] = GET_ULONG_BE(input, 0);
		    ulbuf[1] = GET_ULONG_BE(input, 4);
		    ulbuf[2] = GET_ULONG_BE(input, 8);
		    ulbuf[3] = GET_ULONG_BE(input, 12);
		    while (i < 32)
		    {
			    ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
			    i++;
		    }
		    PUT_ULONG_BE(ulbuf[35], output, 0);
		    PUT_ULONG_BE(ulbuf[34], output, 4);
		    PUT_ULONG_BE(ulbuf[33], output, 8);
		    PUT_ULONG_BE(ulbuf[32], output, 12);
	    }

	    private byte[] padding(byte[] input, int mode)
	    {
		    if (input == null) 
		    {
			    return null;
		    }
		
		    byte[] ret = (byte[]) null;
		    if (mode == SM4_ENCRYPT) 
		    {
			    int p = 16 - input.Length % 16;
			    ret = new byte[input.Length + p];
			    Array.Copy(input, 0, ret, 0, input.Length);
			    for (int i = 0; i < p; i++) 
			    {
				    ret[input.Length + i] = (byte) p;
			    }
		    } 
		    else 
		    {
			    int p = input[input.Length - 1];
			    ret = new byte[input.Length - p];
			    Array.Copy(input, 0, ret, 0, input.Length - p);
		    }
		    return ret;
	    }

	    public void sm4_setkey_enc(SM4_Context ctx, byte[] key)
	    {
		    ctx.mode = SM4_ENCRYPT;
		    sm4_setkey(ctx.sk, key);
	    }

	    public void sm4_setkey_dec(SM4_Context ctx, byte[] key)
	    {
		    int i = 0;
		    ctx.mode = SM4_DECRYPT;
		    sm4_setkey(ctx.sk, key);
		    for (i = 0; i < 16; i++) 
		    {
			    SWAP(ctx.sk, i);
		    }
	    }

	    public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input)
	    {
		    if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT)) 
		    {
			    input = padding(input, SM4_ENCRYPT);
		    }
		
		    int length = input.Length;
            byte[] bins = new byte[length];
            Array.Copy(input,0,bins,0,length);
            byte[] bous = new byte[length];
		    for(int i = 0 ; length > 0; length -= 16,i ++)
		    {
			    byte[] inBytes = new byte[16];
			    byte[] outBytes = new byte[16];
                Array.Copy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
			    sm4_one_round(ctx.sk, inBytes, outBytes);
                Array.Copy(outBytes, 0, bous, i * 16, length > 16 ? 16 : length);
		    }
		
		    if (ctx.isPadding && ctx.mode == SM4_DECRYPT) 
		    {
			    bous = padding(bous, SM4_DECRYPT);
		    }
            return bous;
	    }

	    public byte[] sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input)
	    {
		    if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) 
		    {
			    input = padding(input, SM4_ENCRYPT);
		    }
		
		    int i = 0;
		    int length = input.Length;
		    byte[] bins = new byte[length];
            Array.Copy(input,0,bins,0,length);
            byte[] bous = null;
            List bousList = new List();
		    if (ctx.mode == SM4_ENCRYPT) 
		    {
			    for(int j = 0; length > 0; length -= 16 , j ++)
			    {
				    byte[] inBytes = new byte[16];
				    byte[] outBytes = new byte[16];
				    byte[] out1 = new byte[16];

                    Array.Copy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
				    for (i = 0; i < 16; i++) 
				    {
					    outBytes[i] = ((byte) (inBytes[i] ^ iv[i]));
				    }
				    sm4_one_round(ctx.sk, outBytes, out1);
				    Array.Copy(out1, 0, iv, 0, 16);
                    for(int k = 0;k < 16;k ++){
                        bousList.Add(out1[k]);
                    }
			    }
		    } 
		    else 
		    {
			    byte[] temp = new byte[16];
                for(int j = 0; length > 0; length -= 16 , j ++)
			    {
				    byte[] inBytes = new byte[16];
				    byte[] outBytes = new byte[16];
				    byte[] out1 = new byte[16];
				
				    Array.Copy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
                    Array.Copy(inBytes, 0, temp, 0, 16);
                    sm4_one_round(ctx.sk, inBytes, outBytes);
				    for (i = 0; i < 16; i++) 
				    {
					    out1[i] = ((byte) (outBytes[i] ^ iv[i]));
				    }
				    Array.Copy(temp, 0, iv, 0, 16);
                    for (int k = 0; k < 16; k++)
                    {
                        bousList.Add(out1[k]);
                    }
			    }
			    
		    }
		
		    if (ctx.isPadding && ctx.mode == SM4_DECRYPT) 
		    {
                bous = padding(bousList.ToArray(), SM4_DECRYPT);
                return bous;
            }
            else
            {
                return bousList.ToArray();
            }
	    }
    }
}

b.SM4实体类

【SM4_Context.cs】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Com.Mlq.SM
{
    class SM4_Context
    {
        public int mode;

        public long[] sk;

        public bool isPadding;

        public SM4_Context()
        {
            this.mode = 1;
            this.isPadding = true;
            this.sk = new long[32];
        }  
    }
}

c.SM4工具类

【SM4Utils.cs】

using Org.BouncyCastle.Utilities.Encoders;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Com.Mlq.SM
{
    class SM4Utils
    {
        public String secretKey = "";
        public String iv = "";
        public bool hexString = false;

        public String Encrypt_ECB(String plainText)
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_ENCRYPT;

            byte[] keyBytes;
            if (hexString)
            {
                keyBytes = Hex.Decode(secretKey);
            }
            else
            {
                keyBytes = Encoding.Default.GetBytes(secretKey);
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_ecb(ctx, Encoding.Default.GetBytes(plainText));

            String cipherText = Encoding.Default.GetString(Hex.Encode(encrypted));
            return cipherText;  
        }

        public String Decrypt_ECB(String cipherText)
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_DECRYPT;

            byte[] keyBytes;
            if (hexString)
            {
                keyBytes = Hex.Decode(secretKey);
            }
            else
            {
                keyBytes = Encoding.Default.GetBytes(secretKey);
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Hex.Decode(cipherText));
            return Encoding.Default.GetString(decrypted);
        }
        public String Encrypt_CBC(String plainText)
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_ENCRYPT;

            byte[] keyBytes;
            byte[] ivBytes;
            if (hexString)
            {
                keyBytes = Hex.Decode(secretKey);
                ivBytes = Hex.Decode(iv);
            }
            else
            {
                keyBytes = Encoding.Default.GetBytes(secretKey);
                ivBytes = Encoding.Default.GetBytes(iv);
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Encoding.Default.GetBytes(plainText));

            String cipherText = Encoding.Default.GetString(Hex.Encode(encrypted));
            return cipherText;
        }

        public String Decrypt_CBC(String cipherText)
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_DECRYPT;

            byte[] keyBytes;
            byte[] ivBytes;
            if (hexString)
            {
                keyBytes = Hex.Decode(secretKey);
                ivBytes = Hex.Decode(iv);
            }
            else
            {
                keyBytes = Encoding.Default.GetBytes(secretKey);
                ivBytes = Encoding.Default.GetBytes(iv);
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Hex.Decode(cipherText));
            return Encoding.Default.GetString(decrypted);
        }

        //[STAThread]
        //public static void Main()
        //{
        //    String plainText = "ererfeiisgod";  
          
        //    SM4Utils sm4 = new SM4Utils();  
        //    sm4.secretKey = "JeF8U9wHFOMfs2Y8";  
        //    sm4.hexString = false;  
          
        //    System.Console.Out.WriteLine("ECB模式");  
        //    String cipherText = sm4.Encrypt_ECB(plainText);  
        //    System.Console.Out.WriteLine("密文: " + cipherText);  
        //    System.Console.Out.WriteLine("");  
          
        //    plainText = sm4.Decrypt_ECB(cipherText);  
        //    System.Console.Out.WriteLine("明文: " + plainText);  
        //    System.Console.Out.WriteLine("");  
          
        //    System.Console.Out.WriteLine("CBC模式");  
        //    sm4.iv = "UISwD9fW6cFh9SNS";  
        //    cipherText = sm4.Encrypt_CBC(plainText);  
        //    System.Console.Out.WriteLine("密文: " + cipherText);  
        //    System.Console.Out.WriteLine("");  
          
        //    plainText = sm4.Decrypt_CBC(cipherText);  
        //    System.Console.Out.WriteLine("明文: " + plainText);

        //    Console.ReadLine();
        //}
    }
}


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