C# 常用加密算法函数 合集
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
namespace MyERP.Code
{
public static class Encrypt
{
///
/// MD5不可逆加密
///
/// 源字符串
///
public static string MD5Encrypt(string strData)
{
try
{
MD5CryptoServiceProvider mD5CryptoServiceProvider = new MD5CryptoServiceProvider();
//return Convert.ToBase64String(https://www.wendangku.net/doc/2c13584773.html,puteHash(Encoding.Default.GetBytes(strData.Trim())));
//和Sql一致
byte[] bytes = https://www.wendangku.net/doc/2c13584773.html,puteHash(Encoding.Default.GetBytes(strData.Trim().ToCharArray()));
string[] chars = BitConverter.ToString(bytes).Split('-');
string rtn = string.Concat(chars);
return rtn;
}
catch
{
throw;
}
}
///
/// Des加密字符串
///
/// 源字符串
/// 8位密码
///
public static string DESEncrypt(string SourceStr, string myKey = "")
{
string result;
try
{
string key = "{0}!@#$%^&*";
myKey = string.Format(key, myKey).Substring(0, 8);
DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider();
byte[] bytes = Encoding.Default.GetBytes(SourceStr);
dESCryptoServiceProvider.Key = Encoding.UTF8.GetBytes(myKey);
dESCryptoServiceProvider.IV = Encoding.UTF8.GetBytes(myKey);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, dESCryptoServiceProvider.CreateEncryptor(), CryptoStreamMode.Write);
StreamWriter streamWriter = new StreamWriter(cryptoStream);
streamWriter.Write(SourceStr);
streamWriter.Flush();
cryptoStream.FlushFinalBlock();
memoryStream.Flush();
result = Convert.ToBase64String(memoryStream.GetBuffer(), 0, checked((int)memoryStream.Length));
}
catch
{
throw;
}
return result;
}
///
/// Des解密字符串
///
/// 源字符串
/// 8位密码
///
public static string DESDecrypt(string SourceStr, string myKey = "")
{
try
{
string key = "{0}!@#$%^&*";
key = string.Format(key, myKey).Substring(0, 8);
DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider();
dESCryptoServiceProvider.Key = Encoding.UTF8.GetBytes(myKey);
dESCryptoServiceProvider.IV = Encoding.UTF8.GetBytes(myKey);
byte[] buffer = Convert.FromBase64String(SourceStr);
MemoryStream memoryStream = new MemoryStream(buffer);
CryptoStream cryptoStream = new CryptoStream(memoryStream, dESCryptoServiceProvider.CreateDecryptor(), CryptoStreamMode.Read);
StreamReader streamReader = new StreamReader(cryptoStream);
return streamReader.ReadToEnd();
}
catch
{
throw;
}
}
///
/// TripleDes加密字符串
///
/// 源字符串
/// 8位密码
///
public static string TriDESEncrypt(string SourceStr, string myKey)
{
string result;
try
{
string key = "{0}!@#$%^&*~`qwertyuiopasdfghjklzxcvbnm";
myKey = string.Format(key, myKey).Substring(0, 24);
TripleDESCryptoServiceProvider dESCryptoServiceProvider = new TripleDESCryptoServiceProvider();
byte[] bytes = Encoding.Default.GetBytes(SourceStr);
dESCryptoServiceProvider.Key = Encoding.UTF8.GetBytes(myKey);
dESCryptoServiceProvider.IV = Encoding.UTF8.GetBytes(myKey.Substring(0, 8));
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, dESCryptoServiceProvider.CreateEncryptor(), CryptoStreamMode.Write);
StreamWriter streamWriter = new StreamWriter(cryptoStream);
streamWriter.Write(SourceStr);
streamWriter.Flush();
cryptoStream.FlushFinalBlock();
memoryStream.Flush();
result = Convert.ToBase64String(memoryStream.GetBuffer(), 0, checked((int)memoryStream.Length));
}
catch
{
throw;
}
return result;
}
///
/// TripleDes解密字符串
///
/// 源字符串
/// 8位密码
///
public static string TriDESDecrypt(string SourceStr, string myKey)
{
try
{
string key = "{0}!@#$%^&*~`qwertyuiopasdfghjklzxcvbnm";
myKey = string.Format(key, myKey).Substring(0, 24);
TripleDESCryptoServiceProvider dESCryptoService
Provider = new TripleDESCryptoServiceProvider();
dESCryptoServiceProvider.Key = Encoding.UTF8.GetBytes(myKey);
dESCryptoServiceProvider.IV = Encoding.UTF8.GetBytes(myKey.Substring(0, 8));
byte[] buffer = Convert.FromBase64String(SourceStr);
MemoryStream memoryStream = new MemoryStream(buffer);
CryptoStream cryptoStream = new CryptoStream(memoryStream, dESCryptoServiceProvider.CreateDecryptor(), CryptoStreamMode.Read);
StreamReader streamReader = new StreamReader(cryptoStream);
return streamReader.ReadToEnd();
}
catch
{
throw;
}
}
///
/// RSA加密字符串
///
/// 源字符串
/// 密码
///
public static string RSAEncrypt(string SourceStr, string myKey)
{
try
{
CspParameters param = new CspParameters();
param.KeyContainerName = myKey;//密匙容器的名称，保持加密解密一致才能解密成功
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param);
byte[] plaindata = Encoding.Default.GetBytes(SourceStr);//将要加密的字符串转换为字节数组
byte[] encryptdata = rsa.Encrypt(plaindata, false);//将加密后的字节数据转换为新的加密字节数组
return Convert.ToBase64String(encryptdata);//将加密后的字节数组转换为字符串
}
catch
{
throw;
}
}
///
/// RSA解密字符串
///
/// 源字符串
/// 密码
///
public static string RSADecrypt(string SourceStr, string myKey)
{
try
{
CspParameters param = new CspParameters();
param.KeyContainerName = myKey;
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param);
byte[] encryptdata = Convert.FromBase64String(SourceStr);
byte[] decryptdata = rsa.Decrypt(encryptdata, false);
return Encoding.Default.GetString(decryptdata);
}
catch
{
throw;
}
}
///
/// AES加密
///
/// 被加密的明文
/// 密钥
/// 向量
///
public static string AESEncrypt(string SourceStr, string myKey, string
Vector)
{
byte[] plainBytes = Encoding.UTF8.GetBytes(SourceStr);
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(myKey.PadRight(bKey.Length)), bKey, bKey.Length);
byte[] bVector = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
byte[] Cryptograph = null; // 加密后的密文
Rijndael Aes = Rijndael.Create();
try
{
// 开辟一块内存流
using (MemoryStream Memory = new MemoryStream())
{
// 把内存流对象包装成加密流对象
using (CryptoStream Encryptor = new CryptoStream(Memory,
Aes.CreateEncryptor(bKey, bVector),
CryptoStreamMode.Write))
{
// 明文数据写入加密流
Encryptor.Write(plainBytes, 0, plainBytes.Length);
Encryptor.FlushFinalBlock();
Cryptograph = Memory.ToArray();
}
}
}
catch
{
Cryptograph = null;
}
return Convert.ToBase64String(Cryptograph);
}
///
/// AES解密
///
/// 被解密的密文
/// 密钥
/// 向量
///
public static string AESDecrypt(string SourceStr, string myKey, string Vector)
{
byte[] encryptedBytes = Convert.FromBase64String(SourceStr);
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(myKey.PadRight(bKey.Length)), bKey, bKey.Length);
byte[] bVector = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length);
byte[] original = null; // 解密后的明文
Rijndael Aes = Rijndael.Create();
try
{
// 开辟一块内存流，存储密文
using (MemoryStream Memory = new MemoryStream(encryptedBytes))
{
// 把内存流对象包装成加密流对象
using (CryptoStream Decryptor = new CryptoStream(Memory,
Aes.CreateDecryptor(bKey, bVector),
CryptoStreamMode.Read))
{
// 明文存储区
using (MemoryStream originalMemory = new MemoryStream())
{
byte[] Buffer = new byte[1024];
int readBytes = 0;
while ((readBytes = Decryptor.Read(Buffer, 0, Buffer.Length)) > 0)
{
originalMemory.Write(Buffer, 0, readBytes);
}
original = originalMemory.ToArray();
}
}
}
}
catch
{
original = null;
}
return Encoding.UTF8.GetString(original);
}
///
/// AES加密
///
/// 被加密的明文
/// 密钥
///
public static string AESEncrypt(string SourceStr, string myKey)
{
MemoryStream mStream = new MemoryStream();
RijndaelManaged aes = new RijndaelManaged();
byte[] plainBytes = Encoding.UTF8.GetBytes(SourceStr);
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(myKey.PadRight(bKey.Length)), bKey, bKey.Length);
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = 128;
//aes.Key = _key;
aes.Key = bKey;
//aes.IV = _iV;
CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateEncryptor(), CryptoStreamMode.Write);
try
{
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
cryptoStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
throw;
}
finally
{
cryptoStream.Close();
mStream.Close();
aes.Clear();
}
}
///
/// AES解密
///
/// 被加密的明文
/// 密钥
///
public static string AESDecrypt(string SourceStr, string myKey)
{
byte[] encryptedBytes = Convert.FromBase64String(SourceStr);
byte[] bKey = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(myKey.PadRight(bKey.Length)), bKey, bKey.Length);
MemoryStream mStream = new MemoryStream(encryptedBytes);
//mStream.Write( encryptedBytes, 0, encryptedBytes.Length );
//mStream.Seek( 0, SeekOrigin.Begin );
RijndaelManaged aes = new RijndaelManaged();
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = 128;
aes.Key = bKey;
//aes.IV = _iV;
CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateDecr
yptor(), CryptoStreamMode.Read);
try
{
byte[] tmp = new byte[encryptedBytes.Length + 32];
int len = cryptoStream.Read(tmp, 0, encryptedBytes.Length + 32);
byte[] ret = new byte[len];
Array.Copy(tmp, 0, ret, 0, len);
return Encoding.UTF8.GetString(ret);
}
catch
{
throw;
}
finally
{
cryptoStream.Close();
mStream.Close();
aes.Clear();
}
}
}
}