目录

• aes 对称加密密钥必须是32字节
• MD5 不可逆加密
• SHA 256 不可逆加密
• RSA 非对称加密解密

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{/// /// 获取密钥 必须是32字节/// private static string Key{get { return @"abcdefghijklmnopqrstuvwxyz123456"; }}/// /// AES加密/// /// 明文字符串/// 密文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 = https://www.it610.com/article/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{/// /// SHA256加密/// /// /// 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{publicclass RSAPkcs8Helper{/// /// 签名/// /// 待签名字符串/// 私钥/// 编码格式/// 签名后字符串public static string sign(string content, string privateKey, string input_charset){byte[] Data = https://www.it610.com/article/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); }/// /// 验签/// /// 待验签字符串/// 签名/// 公钥/// 编码格式/// true(通过)，false(不通过)public static bool verify(string content, string signedString, string publicKey, string input_charset){bool result = false; byte[] Data = https://www.it610.com/article/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; }/// /// 加密/// /// 需要加密的字符串/// 公钥/// 编码格式/// 明文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; }/// /// 解密/// /// 加密字符串/// 私钥/// 编码格式/// 明文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; }elsereturn null; }private static RSACryptoServiceProvider DecodePemPrivateKey(String pemstr){byte[] pkcs8privatekey; pkcs8privatekey = Convert.FromBase64String(pemstr); if (pkcs8privatekey != null){RSACryptoServiceProvider rsa = DecodePrivateKeyInfo(pkcs8privatekey); return rsa; }elsereturn 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 readingbyte 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 byteelse if (twobytes == 0x8230)binr.ReadInt16(); //advance 2 byteselsereturn null; bt = binr.ReadByte(); if (bt != 0x02)return null; twobytes = binr.ReadUInt16(); if (twobytes != 0x0001)return null; seq = binr.ReadBytes(15); //read the Sequence OIDif (!CompareBytearrays(seq, SeqOID))//make sure Sequence for OID is correctreturn null; bt = binr.ReadByte(); if (bt != 0x04)//expect an Octet stringreturn null; bt = binr.ReadByte(); //read next byte, or next 2 bytes is0x81 or 0x82; otherwise bt is the byte countif (bt == 0x81)binr.ReadByte(); elseif (bt == 0x82)binr.ReadUInt16(); //------ at this stage, the remaining sequence should be the RSA private keybyte[] 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 forPKCS #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 readingbyte 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 byteelse if (twobytes == 0x8230)binr.ReadInt16(); //advance 2 byteselsereturn null; seq = binr.ReadBytes(15); //read the Sequence OIDif (!CompareBytearrays(seq, SeqOID))//make sure Sequence for OID is correctreturn 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 byteelse if (twobytes == 0x8203)binr.ReadInt16(); //advance 2 byteselsereturn null; bt = binr.ReadByte(); if (bt != 0x00)//expect null byte nextreturn 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 byteelse if (twobytes == 0x8230)binr.ReadInt16(); //advance 2 byteselsereturn 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 moduluselse if (twobytes == 0x8202){highbyte = binr.ReadByte(); //advance 2 byteslowbyte = binr.ReadByte(); }elsereturn null; byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian orderint 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 itbinr.ReadByte(); //skip this null bytemodsize -= 1; //reduce modulus buffer size by 1}byte[] modulus = binr.ReadBytes(modsize); //read the modulus bytesif (binr.ReadByte() != 0x02)//expect an Integer for the exponent datareturn 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 readingbyte 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 byteelse if (twobytes == 0x8230)binr.ReadInt16(); //advance 2 byteselsereturn null; twobytes = binr.ReadUInt16(); if (twobytes != 0x0102)//version numberreturn 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 integerreturn 0; bt = binr.ReadByte(); if (bt == 0x81)count = binr.ReadByte(); // data size in next byteelseif (bt == 0x82){highbyte = binr.ReadByte(); // data size in next 2 byteslowbyte = 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 datacount -= 1; }binr.BaseStream.Seek(-1, SeekOrigin.Current); //last ReadByte wasn't a removed zero, so back up a bytereturn count; }#endregion#region 解析.net 生成的Pemprivate static RSAParameters ConvertFromPublicKey(string pemFileConent){byte[] keyData = https://www.it610.com/article/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 = https://www.it610.com/article/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; //141byte[] pemPublicExponent = new byte[3]; Array.Copy(keyData, index, pemPublicExponent, 0, 3); index += 3; index += 4; //148byte[] pemPrivateExponent = new byte[128]; Array.Copy(keyData, index, pemPrivateExponent, 0, 128); index += 128; index += ((int)keyData[index + 1] == 64 ? 2 : 3); //279byte[] pemPrime1 = new byte[64]; Array.Copy(keyData, index, pemPrime1, 0, 64); index += 64; index += ((int)keyData[index + 1] == 64 ? 2 : 3); //346byte[] pemPrime2 = new byte[64]; Array.Copy(keyData, index, pemPrime2, 0, 64); index += 64; index += ((int)keyData[index + 1] == 64 ? 2 : 3); //412/413byte[] pemExponent1 = new byte[64]; Array.Copy(keyData, index, pemExponent1, 0, 64); index += 64; index += ((int)keyData[index + 1] == 64 ? 2 : 3); //479/480byte[] pemExponent2 = new byte[64]; Array.Copy(keyData, index, pemExponent2, 0, 64); index += 64; index += ((int)keyData[index + 1] == 64 ? 2 : 3); //545/546byte[] 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 = "https://www.it610.com/article/202201131819gao"; Console.WriteLine("原始：" + data); //加密string encrypteddata = https://www.it610.com/article/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 = "https://www.it610.com/article/WI8eYavWOasyYjgWn8r9SXSvW18dmzmlSY4CrWXoTmqHbPCE6iWGYOzes4QOrPDKDPPpHdEpfMYPQZPs2BX84bvpohOejKKQS2TE0hEutk0RMX76ltuFpR51SLqe+TqSEMDbkyoaJRb2OlGA1SqTC+uDpZA1tbofB5v/+5mB5o8="; string datamw = RSAPkcs8Helper.decryptData(endata, privatekey, "UTF-8"); Console.WriteLine("提前获知解密：" + datamw);

【C#加密知识整合|C#加密知识整合 (AES,MD5,RSA,SHA256)】到此这篇关于c#对于加密的一点整合 (AES,MD5,RSA,SHA256)的文章就介绍到这了,更多相关c#加密内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

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