常見的加密方式分爲可逆和不可逆兩種方式
可逆：RSA,AES,DES等
不可逆：常見的MD5，SHAD等
常見的加密方式封裝到一個Password類中
public class Password
{
/// <summary>
/// 此代碼示例通過創建哈希字符串適用於任何 MD5 哈希函數 （在任何平臺） 上創建 32 個字符的十六進制格式哈希字符串
/// 官網案例改編
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static string Get32MD5One(string source)
{
using (System.Security.Cryptography.MD5 md5Hash = System.Security.Cryptography.MD5.Create())
{
byte[] data = md5Hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(source));
System.Text.StringBuilder sBuilder = new System.Text.StringBuilder();
for (int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString("x2"));
}
string hash = sBuilder.ToString();
return hash.ToUpper();
}
}
/// <summary>
/// 獲取16位md5加密
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static string Get16MD5One(string source)
{
using (System.Security.Cryptography.MD5 md5Hash = System.Security.Cryptography.MD5.Create())
{
byte[] data = md5Hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(source));
//轉換成字符串，並取9到25位
string sBuilder = BitConverter.ToString(data, 4, 8);
//BitConverter轉換出來的字符串會在每個字符中間產生一個分隔符，需要去除掉
sBuilder = sBuilder.Replace("-", "");
return sBuilder.ToString().ToUpper();
}
}
//// <summary>
/// </summary>
/// <param name="strSource">需要加密的明文</param>
/// <returns>返回32位加密結果，該結果取32位加密結果的第9位到25位</returns>
public static string Get32MD5Two(string source)
{
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
//獲取密文字節數組
byte[] bytResult = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(source));
//轉換成字符串，32位
string strResult = BitConverter.ToString(bytResult);
//BitConverter轉換出來的字符串會在每個字符中間產生一個分隔符，需要去除掉
strResult = strResult.Replace("-", "");
return strResult.ToUpper();
}
//// <summary>
/// </summary>
/// <param name="strSource">需要加密的明文</param>
/// <returns>返回16位加密結果，該結果取32位加密結果的第9位到25位</returns>
public static string Get16MD5Two(string source)
{
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
//獲取密文字節數組
byte[] bytResult = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(source));
//轉換成字符串，並取9到25位
string strResult = BitConverter.ToString(bytResult, 4, 8);
//BitConverter轉換出來的字符串會在每個字符中間產生一個分隔符，需要去除掉
strResult = strResult.Replace("-", "");
return strResult.ToUpper();
}
//SHA爲不可逆加密方式
public static string SHA1Encrypt(string normalTxt)
{
var bytes = System.Text.Encoding.Default.GetBytes(normalTxt);
var SHA = new System.Security.Cryptography.SHA1CryptoServiceProvider();
var encryptbytes = SHA.ComputeHash(bytes);
return Convert.ToBase64String(encryptbytes);
}
public static string SHA256Encrypt(string normalTxt)
{
var bytes = System.Text.Encoding.Default.GetBytes(normalTxt);
var SHA256 = new System.Security.Cryptography.SHA256CryptoServiceProvider();
var encryptbytes = SHA256.ComputeHash(bytes);
return Convert.ToBase64String(encryptbytes);
}
public static string SHA384Encrypt(string normalTxt)
{
var bytes = System.Text.Encoding.Default.GetBytes(normalTxt);
var SHA384 = new System.Security.Cryptography.SHA384CryptoServiceProvider();
var encryptbytes = SHA384.ComputeHash(bytes);
return Convert.ToBase64String(encryptbytes);
}
public string SHA512Encrypt(string normalTxt)
{
var bytes = System.Text.Encoding.Default.GetBytes(normalTxt);
var SHA512 = new System.Security.Cryptography.SHA512CryptoServiceProvider();
var encryptbytes = SHA512.ComputeHash(bytes);
return Convert.ToBase64String(encryptbytes);
}
/// <summary>
/// 將base64格式，轉換utf8
/// </summary>
/// <param name="content">解密內容</param>
/// <returns></returns>
public static string Base64Decode(string content)
{
byte[] bytes = Convert.FromBase64String(content);
return System.Text.Encoding.UTF8.GetString(bytes);
}
/// <summary>
/// DES加密數據
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string DESEncryption(string Text, string sKey=null)
{
sKey = sKey ?? "zhiqiang";
try
{
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
byte[] inputByteArray;
inputByteArray = System.Text.Encoding.Default.GetBytes(Text);
string md5SKey = Get32MD5One(sKey).Substring(0, 8);
des.Key = System.Text.ASCIIEncoding.ASCII.GetBytes(md5SKey);
des.IV = System.Text.ASCIIEncoding.ASCII.GetBytes(md5SKey);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.StringBuilder ret = new System.Text.StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
return ret.ToString();
}catch { return "error"; }
}
/// <summary>
/// DES解密數據
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string DESDecrypt(string Text, string sKey=null)
{
sKey = sKey ?? "zhiqiang";
try
{
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
string md5SKey = Get32MD5One(sKey).Substring(0, 8);
des.Key = System.Text.ASCIIEncoding.ASCII.GetBytes(md5SKey);
des.IV = System.Text.ASCIIEncoding.ASCII.GetBytes(md5SKey);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}catch { return "error"; }
}
/// <summary>
/// RSA加密數據
/// </summary>
/// <param name="express"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string RSAEncryption(string express, string KeyContainerName = null)
{
System.Security.Cryptography.CspParameters param = new System.Security.Cryptography.CspParameters();
param.KeyContainerName = KeyContainerName ?? "zhiqiang"; //密匙容器的名稱，保持加密解密一致才能解密成功
using (System.Security.Cryptography.RSACryptoServiceProvider rsa = new System.Security.Cryptography.RSACryptoServiceProvider(param))
{
byte[] plaindata = System.Text.Encoding.Default.GetBytes(express);//將要加密的字符串轉換爲字節數組
byte[] encryptdata = rsa.Encrypt(plaindata, false);//將加密後的字節數據轉換爲新的加密字節數組
return Convert.ToBase64String(encryptdata);//將加密後的字節數組轉換爲字符串
}
}
/// <summary>
/// RSA解密數據
/// </summary>
/// <param name="express"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string RSADecrypt(string ciphertext, string KeyContainerName = null)
{
System.Security.Cryptography.CspParameters param = new System.Security.Cryptography.CspParameters();
param.KeyContainerName = KeyContainerName ?? "zhiqiang";
using (System.Security.Cryptography.RSACryptoServiceProvider rsa = new System.Security.Cryptography.RSACryptoServiceProvider(param))
{
byte[] encryptdata = Convert.FromBase64String(ciphertext);
byte[] decryptdata = rsa.Decrypt(encryptdata, false);
return System.Text.Encoding.Default.GetString(decryptdata);
}
}
}