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namespace StreamAspNet.Common
{
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
public class SimpleEncryptor
{
public static string MD5(string str)
{
MD5 m = new MD5CryptoServiceProvider();
byte[] s = m.ComputeHash(UnicodeEncoding.UTF8.GetBytes(str));
string md5Str = BitConverter.ToString(s).Replace("-", "");
return md5Str;
}
public static byte[] DESDecrypt(byte[] EncryptedConent)
{
if (EncryptedConent == null)
{
return null;
}
byte[] buffer = new byte[] { 0xda, 0xe9, 190, 0xe0, 0x8d, 0xfb, 0xf3, 0xc2 };
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
provider.Key = buffer;
provider.IV = buffer;
MemoryStream stream = new MemoryStream(EncryptedConent);
ICryptoTransform transform = provider.CreateDecryptor();
CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Read);
StreamReader reader = new StreamReader(stream2);
byte[] bytes = Encoding.ASCII.GetBytes(reader.ReadToEnd());
reader.Close();
stream2.Close();
stream.Close();
return bytes;
}
public static byte[] DESEncrypt(byte[] Content)
{
if (Content == null)
{
return null;
}
byte[] buffer = new byte[] { 0xda, 0xe9, 190, 0xe0, 0x8d, 0xfb, 0xf3, 0xc2 };
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
provider.Key = buffer;
provider.IV = buffer;
MemoryStream stream = new MemoryStream();
ICryptoTransform transform = provider.CreateEncryptor();
CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Write);
stream2.Write(Content, 0, Content.Length);
stream2.Close();
byte[] buffer2 = stream.ToArray();
stream.Close();
return buffer2;
}
public static string RSAGetSignature(string PrivateKey, string Code)
{
RSACryptoServiceProvider key = new RSACryptoServiceProvider();
key.FromXmlString(PrivateKey);
RSAPKCS1SignatureFormatter formatter = new RSAPKCS1SignatureFormatter(key);
formatter.SetHashAlgorithm("SHA1");
byte[] bytes = Encoding.ASCII.GetBytes(Code);
byte[] rgbHash = new SHA1Managed().ComputeHash(bytes);
return Convert.ToBase64String(formatter.CreateSignature(rgbHash));
}
public static bool RSAVerify(string PublicKey, string Code, string Key)
{
RSACryptoServiceProvider key = new RSACryptoServiceProvider();
key.FromXmlString(PublicKey);
RSAPKCS1SignatureDeformatter deformatter = new RSAPKCS1SignatureDeformatter(key);
deformatter.SetHashAlgorithm("SHA1");
byte[] rgbSignature = Convert.FromBase64String(Key);
byte[] rgbHash = new SHA1Managed().ComputeHash(Encoding.ASCII.GetBytes(Code));
try
{
return deformatter.VerifySignature(rgbHash, rgbSignature);
}
catch
{
return false;
}
}
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = { 0xEF, 0xAB, 0x56, 0x78, 0x90, 0x34, 0xCD, 0x12 };
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
byte[] rgbIV = { 0xEF, 0xAB, 0x56, 0x78, 0x90, 0x34, 0xCD, 0x12 };
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
/// <summary>
/// SHA1加密
/// </summary>
/// <param name="SourceString">原字符串</param>
/// <returns></returns>
public string SHA1Encrypt(string SourceString)
{
byte[] StrRes = Encoding.Default.GetBytes(SourceString);
HashAlgorithm iSHA = new SHA1CryptoServiceProvider();
StrRes = iSHA.ComputeHash(StrRes);
StringBuilder EnText = new StringBuilder();
foreach (byte iByte in StrRes)
{
EnText.AppendFormat("{0:x2}", iByte);
}
return EnText.ToString();
}
}
}