Create WindowsNetworking.cs

RSAFromPkcs8.cs

@@ -0,0 +1,384 @@
+    public class RSAFromPkcs8
+    {
+        /// <summary>
+        /// 签名
+        /// </summary>
+        /// <param name="content">待签名字符串</param>
+        /// <param name="privateKey">私钥</param>
+        /// <param name="input_charset">编码格式</param>
+        /// <returns>签名后字符串</returns>
+        public static string sign(string content, string privateKey, string input_charset)
+        {
+            byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content);
+            RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey);
+            SHA1 sh = new SHA1CryptoServiceProvider();
+            byte[] signData = rsa.SignData(Data, sh);
+            return Convert.ToBase64String(signData);
+        }
+
+        /// <summary>
+        /// 验签
+        /// </summary>
+        /// <param name="content">待验签字符串</param>
+        /// <param name="signedString">签名</param>
+        /// <param name="publicKey">公钥</param>
+        /// <param name="input_charset">编码格式</param>
+        /// <returns>true(通过)，false(不通过)</returns>
+        public static bool verify(string content, string signedString, string publicKey, string input_charset)
+        {
+            bool result = false;
+            byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content);
+            byte[] data = Convert.FromBase64String(signedString);
+            RSAParameters paraPub = ConvertFromPublicKey(publicKey);
+            RSACryptoServiceProvider rsaPub = new RSACryptoServiceProvider();
+            rsaPub.ImportParameters(paraPub);
+            SHA1 sh = new SHA1CryptoServiceProvider();
+            result = rsaPub.VerifyData(Data, sh, data);
+            return result;
+        }
+
+        /// <summary>
+        /// RSA加密
+        /// </summary>
+        /// <param name="publickey"></param>
+        /// <param name="content"></param>
+        /// <returns></returns>
+        public static string pkcs8Encrypt(string privateKey, string content)
+        {
+            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
+            byte[] cipherbytes;
+            cipherbytes = rsa.Encrypt(Encoding.GetEncoding("utf-8").GetBytes(content), false);
+            return Convert.ToBase64String(cipherbytes);
+        }
+
+
+        /// <summary>
+        /// RSA加密
+        /// </summary>
+        /// <param name="publickey"></param>
+        /// <param name="content"></param>
+        /// <returns></returns>
+        public static string encrypt(string publickey, string content)
+        {
+            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
+            byte[] cipherbytes;
+            rsa.ImportParameters(ConvertFromPublicKey(publickey));
+            cipherbytes = rsa.Encrypt(Encoding.GetEncoding("utf-8").GetBytes(content), false);
+            return Convert.ToBase64String(cipherbytes);
+        }
+
+        /// <summary>
+        /// 解密
+        /// </summary>
+        /// <param name="resData">加密字符串</param>
+        /// <param name="privateKey">私钥</param>
+        /// <param name="input_charset">编码格式</param>
+        /// <returns>明文</returns>
+        public static string decryptData(string resData, string privateKey, string input_charset)
+        {
+            byte[] DataToDecrypt = Convert.FromBase64String(resData);
+            string result = "";
+            for (int j = 0; j < DataToDecrypt.Length / 128; j++)
+            {
+                byte[] buf = new byte[128];
+                for (int i = 0; i < 128; i++)
+                {
+
+                    buf[i] = DataToDecrypt[i + 128 * j];
+                }
+                result += decrypt(buf, privateKey, input_charset);
+            }
+            return result;
+        }
+
+        #region 内部方法
+
+        private static string decrypt(byte[] data, string privateKey, string input_charset)
+        {
+            string result = "";
+            RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey);
+            SHA1 sh = new SHA1CryptoServiceProvider();
+            byte[] source = rsa.Decrypt(data, false);
+            char[] asciiChars = new char[Encoding.GetEncoding(input_charset).GetCharCount(source, 0, source.Length)];
+            Encoding.GetEncoding(input_charset).GetChars(source, 0, source.Length, asciiChars, 0);
+            result = new string(asciiChars);
+            //result = ASCIIEncoding.ASCII.GetString(source);
+            return result;
+        }
+
+        public static RSACryptoServiceProvider DecodePemPrivateKey(String pemstr)
+        {
+            byte[] pkcs8privatekey;
+            pkcs8privatekey = Convert.FromBase64String(pemstr);
+            if (pkcs8privatekey != null)
+            {
+                RSACryptoServiceProvider rsa = DecodePrivateKeyInfo(pkcs8privatekey);
+                return rsa;
+            }
+            else
+                return null;
+        }
+
+        private static RSACryptoServiceProvider DecodePrivateKeyInfo(byte[] pkcs8)
+        {
+            byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
+            byte[] seq = new byte[15];
+
+            MemoryStream mem = new MemoryStream(pkcs8);
+            int lenstream = (int)mem.Length;
+            BinaryReader binr = new BinaryReader(mem);    //wrap Memory Stream with BinaryReader for easy reading
+            byte bt = 0;
+            ushort twobytes = 0;
+
+            try
+            {
+                twobytes = binr.ReadUInt16();
+                if (twobytes == 0x8130)	//data read as little endian order (actual data order for Sequence is 30 81)
+                    binr.ReadByte();	//advance 1 byte
+                else if (twobytes == 0x8230)
+                    binr.ReadInt16();	//advance 2 bytes
+                else
+                    return null;
+
+                bt = binr.ReadByte();
+                if (bt != 0x02)
+                    return null;
+
+                twobytes = binr.ReadUInt16();
+
+                if (twobytes != 0x0001)
+                    return null;
+
+                seq = binr.ReadBytes(15);		//read the Sequence OID
+                if (!CompareBytearrays(seq, SeqOID))	//make sure Sequence for OID is correct
+                    return null;
+
+                bt = binr.ReadByte();
+                if (bt != 0x04)	//expect an Octet string 
+                    return null;
+
+                bt = binr.ReadByte();		//read next byte, or next 2 bytes is  0x81 or 0x82; otherwise bt is the byte count
+                if (bt == 0x81)
+                    binr.ReadByte();
+                else
+                    if (bt == 0x82)
+                    binr.ReadUInt16();
+                //------ at this stage, the remaining sequence should be the RSA private key
+
+                byte[] rsaprivkey = binr.ReadBytes((int)(lenstream - mem.Position));
+                RSACryptoServiceProvider rsacsp = DecodeRSAPrivateKey(rsaprivkey);
+                return rsacsp;
+            }
+
+            catch (Exception)
+            {
+                return null;
+            }
+
+            finally { binr.Close(); }
+
+        }
+
+        private static bool CompareBytearrays(byte[] a, byte[] b)
+        {
+            if (a.Length != b.Length)
+                return false;
+            int i = 0;
+            foreach (byte c in a)
+            {
+                if (c != b[i])
+                    return false;
+                i++;
+            }
+            return true;
+        }
+
+        private static RSACryptoServiceProvider DecodeRSAPrivateKey(byte[] privkey)
+        {
+            byte[] MODULUS, E, D, P, Q, DP, DQ, IQ;
+
+            // ---------  Set up stream to decode the asn.1 encoded RSA private key  ------
+            MemoryStream mem = new MemoryStream(privkey);
+            BinaryReader binr = new BinaryReader(mem);    //wrap Memory Stream with BinaryReader for easy reading
+            byte bt = 0;
+            ushort twobytes = 0;
+            int elems = 0;
+            try
+            {
+                twobytes = binr.ReadUInt16();
+                if (twobytes == 0x8130)	//data read as little endian order (actual data order for Sequence is 30 81)
+                    binr.ReadByte();	//advance 1 byte
+                else if (twobytes == 0x8230)
+                    binr.ReadInt16();	//advance 2 bytes
+                else
+                    return null;
+
+                twobytes = binr.ReadUInt16();
+                if (twobytes != 0x0102)	//version number
+                    return null;
+                bt = binr.ReadByte();
+                if (bt != 0x00)
+                    return null;
+
+
+                //------  all private key components are Integer sequences ----
+                elems = GetIntegerSize(binr);
+                MODULUS = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                E = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                D = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                P = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                Q = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                DP = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                DQ = binr.ReadBytes(elems);
+
+                elems = GetIntegerSize(binr);
+                IQ = binr.ReadBytes(elems);
+
+                // ------- create RSACryptoServiceProvider instance and initialize with public key -----
+                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
+                RSAParameters RSAparams = new RSAParameters();
+                RSAparams.Modulus = MODULUS;
+                RSAparams.Exponent = E;
+                RSAparams.D = D;
+                RSAparams.P = P;
+                RSAparams.Q = Q;
+                RSAparams.DP = DP;
+                RSAparams.DQ = DQ;
+                RSAparams.InverseQ = IQ;
+                RSA.ImportParameters(RSAparams);
+                return RSA;
+            }
+            catch (Exception)
+            {
+                return null;
+            }
+            finally { binr.Close(); }
+        }
+
+        private static int GetIntegerSize(BinaryReader binr)
+        {
+            byte bt = 0;
+            byte lowbyte = 0x00;
+            byte highbyte = 0x00;
+            int count = 0;
+            bt = binr.ReadByte();
+            if (bt != 0x02)		//expect integer
+                return 0;
+            bt = binr.ReadByte();
+
+            if (bt == 0x81)
+                count = binr.ReadByte();	// data size in next byte
+            else
+                if (bt == 0x82)
+            {
+                highbyte = binr.ReadByte(); // data size in next 2 bytes
+                lowbyte = binr.ReadByte();
+                byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };
+                count = BitConverter.ToInt32(modint, 0);
+            }
+            else
+            {
+                count = bt;     // we already have the data size
+            }
+
+            while (binr.ReadByte() == 0x00)
+            {	//remove high order zeros in data
+                count -= 1;
+            }
+            binr.BaseStream.Seek(-1, SeekOrigin.Current);		//last ReadByte wasn't a removed zero, so back up a byte
+            return count;
+        }
+
+        #endregion
+
+        #region 解析.net 生成的Pem
+        public static RSAParameters ConvertFromPublicKey(string pemFileConent)
+        {
+
+            byte[] keyData = Convert.FromBase64String(pemFileConent);
+            if (keyData.Length < 162)
+            {
+                throw new ArgumentException("pem file content is incorrect.");
+            }
+            byte[] pemModulus = new byte[128];
+            byte[] pemPublicExponent = new byte[3];
+            Array.Copy(keyData, 29, pemModulus, 0, 128);
+            Array.Copy(keyData, 159, pemPublicExponent, 0, 3);
+            RSAParameters para = new RSAParameters();
+            para.Modulus = pemModulus;
+            para.Exponent = pemPublicExponent;
+            return para;
+        }
+
+        private static RSAParameters ConvertFromPrivateKey(string pemFileConent)
+        {
+            byte[] keyData = Convert.FromBase64String(pemFileConent);
+            if (keyData.Length < 609)
+            {
+                throw new ArgumentException("pem file content is incorrect.");
+            }
+
+            int index = 11;
+            byte[] pemModulus = new byte[128];
+            Array.Copy(keyData, index, pemModulus, 0, 128);
+
+            index += 128;
+            index += 2;//141
+            byte[] pemPublicExponent = new byte[3];
+            Array.Copy(keyData, index, pemPublicExponent, 0, 3);
+
+            index += 3;
+            index += 4;//148
+            byte[] pemPrivateExponent = new byte[128];
+            Array.Copy(keyData, index, pemPrivateExponent, 0, 128);
+
+            index += 128;
+            index += ((int)keyData[index + 1] == 64 ? 2 : 3);//279
+            byte[] pemPrime1 = new byte[64];
+            Array.Copy(keyData, index, pemPrime1, 0, 64);
+
+            index += 64;
+            index += ((int)keyData[index + 1] == 64 ? 2 : 3);//346
+            byte[] pemPrime2 = new byte[64];
+            Array.Copy(keyData, index, pemPrime2, 0, 64);
+
+            index += 64;
+            index += ((int)keyData[index + 1] == 64 ? 2 : 3);//412/413
+            byte[] pemExponent1 = new byte[64];
+            Array.Copy(keyData, index, pemExponent1, 0, 64);
+
+            index += 64;
+            index += ((int)keyData[index + 1] == 64 ? 2 : 3);//479/480
+            byte[] pemExponent2 = new byte[64];
+            Array.Copy(keyData, index, pemExponent2, 0, 64);
+
+            index += 64;
+            index += ((int)keyData[index + 1] == 64 ? 2 : 3);//545/546
+            byte[] pemCoefficient = new byte[64];
+            Array.Copy(keyData, index, pemCoefficient, 0, 64);
+
+            RSAParameters para = new RSAParameters();
+            para.Modulus = pemModulus;
+            para.Exponent = pemPublicExponent;
+            para.D = pemPrivateExponent;
+            para.P = pemPrime1;
+            para.Q = pemPrime2;
+            para.DP = pemExponent1;
+            para.DQ = pemExponent2;
+            para.InverseQ = pemCoefficient;
+            return para;
+        }
+        #endregion
+    }