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首页 > 软件编程 > C#教程 > c# sha256加密

C#加密知识整合 (AES,MD5,RSA,SHA256)

作者:高1234

这篇文章主要介绍了c#对于加密的一点整合 (AES,MD5,RSA,SHA256),本文给大家介绍的非常详细,对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下

aes 对称加密密钥必须是32字节

using System;
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
    public class AES
    {
        /// <summary>
        /// 获取密钥 必须是32字节
        /// </summary>
        private static string Key
        {
            get { return @"abcdefghijklmnopqrstuvwxyz123456"; }
        }
        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="plainStr">明文字符串</param>
        /// <returns>密文</returns>
        public static string AESEncrypt(string encryptStr)
        {
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key);
            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(encryptStr);
            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;
            ICryptoTransform cTransform = rDel.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }
        public static string AESDEncrypt(string encryptStr)
        {
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key);
            byte[] toEncryptArray = Convert.FromBase64String(encryptStr);
            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;
            ICryptoTransform cTransform = rDel.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return UTF8Encoding.UTF8.GetString(resultArray);
        }
    }
}

调用方式:

 /// aes 对称加密解密
            string s = AES.AESEncrypt("202201131552测试数据");
            Console.WriteLine(s);
            Console.WriteLine(AES.AESDEncrypt(s));
            Console.WriteLine("------------------------------------------------------");

MD5 不可逆加密

using System;
using System.Security.Cryptography;
namespace ConsoleApp1
{
    public class MD5Helper
    {
        public static string md5(string str)
        {
            try
            {
                MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
                byte[] bytValue, bytHash;
                bytValue = System.Text.Encoding.UTF8.GetBytes(str);
                bytHash = md5.ComputeHash(bytValue);
                md5.Clear();
                string sTemp = "";
                for (int i = 0; i < bytHash.Length; i++)
                {
                    sTemp += bytHash[i].ToString("X").PadLeft(2, '0');
                }
                str = sTemp.ToLower();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return str;
        }
    }
}

调用方式:

/// MD5 不可逆加密
            var MD5 = MD5Helper.md5("123456");
            Console.WriteLine("------------------------------------------------------");

SHA 256 不可逆加密

using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
    public class SHA256Helper
    {
        /// <summary>
        /// SHA256加密
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string SHA256EncryptString(string data)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(data);
            byte[] hash = SHA256Managed.Create().ComputeHash(bytes);
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                builder.Append(hash[i].ToString("x2"));
            }
            return builder.ToString();
        }
    }
}

调用方式:

///SHA 256 不可逆加密
            var sha256 = SHA256Helper.SHA256EncryptString("1111");
            Console.WriteLine("------------------------------------------------------");

RSA 非对称加密解密

百度rsa密钥在线生成 http://web.chacuo.net/netrsakeypair/ 填入公私钥到变量publickey, privatekey

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
    public  class RSAPkcs8Helper
    {
        /// <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);            //MD5 sh = new MD5CryptoServiceProvider();//这里也可以使用MD5加密方式
            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);            //MD5 sh = new MD5CryptoServiceProvider();//这里可以使用MD5加密方式
            SHA1 sh = new SHA1CryptoServiceProvider();
            result = rsaPub.VerifyData(Data, sh, data);
            return result;
        }
        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="resData">需要加密的字符串</param>
        /// <param name="publicKey">公钥</param>
        /// <param name="input_charset">编码格式</param>
        /// <returns>明文</returns>
        public static string encryptData(string resData, string publicKey, string input_charset)
        {
            byte[] DataToEncrypt = Encoding.GetEncoding(input_charset).GetBytes(resData);
            string result = encrypt(DataToEncrypt, publicKey, input_charset);
            return result;
        }
        /// <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 encrypt(byte[] data, string publicKey, string input_charset)
        {
            RSACryptoServiceProvider rsa = DecodePemPublicKey(publicKey);            //MD5 sh = new MD5CryptoServiceProvider();//这里也可以使用MD5加密方式
            SHA1 sh = new SHA1CryptoServiceProvider();
            byte[] result = rsa.Encrypt(data, false);
            return Convert.ToBase64String(result);
        }
        private static string decrypt(byte[] data, string privateKey, string input_charset)
        {
            string result = "";
            RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey);            //MD5 sh = new MD5CryptoServiceProvider();//这里也可以替换使用MD5方式
            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;
        }
        private static RSACryptoServiceProvider DecodePemPublicKey(String pemstr)
        {
            byte[] pkcs8publickkey;
            pkcs8publickkey = Convert.FromBase64String(pemstr);
            if (pkcs8publickkey != null)
            {
                RSACryptoServiceProvider rsa = DecodeRSAPublicKey(pkcs8publickkey);
                return rsa;
            }
            else
                return null;
        }
        private 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 DecodeRSAPublicKey(byte[] publickey)
        {
            // encoded OID sequence for  PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1"
            byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
            byte[] seq = new byte[15];
            // ---------  Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob  ------
            MemoryStream mem = new MemoryStream(publickey);
            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;
                seq = binr.ReadBytes(15);       //read the Sequence OID
                if (!CompareBytearrays(seq, SeqOID))    //make sure Sequence for OID is correct
                    return null;
                twobytes = binr.ReadUInt16();
                if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81)
                    binr.ReadByte();    //advance 1 byte
                else if (twobytes == 0x8203)
                    binr.ReadInt16();   //advance 2 bytes
                else
                    return null;
                bt = binr.ReadByte();
                if (bt != 0x00)     //expect null byte next
                    return null;
                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();
                byte lowbyte = 0x00;
                byte highbyte = 0x00;
                if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81)
                    lowbyte = binr.ReadByte();  // read next bytes which is bytes in modulus
                else if (twobytes == 0x8202)
                {
                    highbyte = binr.ReadByte(); //advance 2 bytes
                    lowbyte = binr.ReadByte();
                }
                else
                    return null;
                byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };   //reverse byte order since asn.1 key uses big endian order
                int modsize = BitConverter.ToInt32(modint, 0);
                byte firstbyte = binr.ReadByte();
                binr.BaseStream.Seek(-1, SeekOrigin.Current);
                if (firstbyte == 0x00)
                {   //if first byte (highest order) of modulus is zero, don't include it
                    binr.ReadByte();    //skip this null byte
                    modsize -= 1;   //reduce modulus buffer size by 1
                }
                byte[] modulus = binr.ReadBytes(modsize);   //read the modulus bytes
                if (binr.ReadByte() != 0x02)            //expect an Integer for the exponent data
                    return null;
                int expbytes = (int)binr.ReadByte();        // should only need one byte for actual exponent data (for all useful values)
                byte[] exponent = binr.ReadBytes(expbytes);
                // ------- create RSACryptoServiceProvider instance and initialize with public key -----
                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
                RSAParameters RSAKeyInfo = new RSAParameters();
                RSAKeyInfo.Modulus = modulus;
                RSAKeyInfo.Exponent = exponent;
                RSA.ImportParameters(RSAKeyInfo);
                return RSA;
            }
            catch (Exception)
            {
                return null;
            }
            finally { binr.Close(); }
        }
        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
        private 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
    }
}

调用方式:

string publickey = "";
            string privatekey = "";
            publickey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDDLA7Of0H4g+WaAToFCdmLDP4DbCc161JcSr0t+XlMSCEiglFhTOh4+HtCWSpVKhwzTO9ShYwWooTqGpfl1LbLg+RhBXtbMq1M+HaVVkscbbDz3xS6ngUMssktw+Q+9rYtGor+lNGSJHF7HnaTJ6Qyv1oUYiIap4oi1sLPMQDIDwIDAQAB";
            privatekey = "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";
            
            //加密字符串
            string data = "202201131819gao";
            Console.WriteLine("原始:" + data);
            //加密
            string encrypteddata = RSAPkcs8Helper.encryptData(data, publickey, "UTF-8");
            Console.WriteLine("加密:" + encrypteddata);
            Console.WriteLine("解密:" + RSAPkcs8Helper.decryptData(encrypteddata, privatekey, "UTF-8"));
            Console.WriteLine("------------------------------------------------------");
            //解密
            string endata = "WI8eYavWOasyYjgWn8r9SXSvW18dmzmlSY4CrWXoTmqHbPCE6iWGYOzes4QOrPDKDPPpHdEpfMYPQZPs2BX84bvpohOejKKQS2TE0hEutk0RMX76ltuFpR51SLqe+TqSEMDbkyoaJRb2OlGA1SqTC+uDpZA1tbofB5v/+5mB5o8=";
            string datamw = RSAPkcs8Helper.decryptData(endata, privatekey, "UTF-8");
            Console.WriteLine("提前获知解密:" + datamw);

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