C#加密算法總結
MD5加密
1 /// <summary>
2 /// MD5加密
3 /// </summary>
4 /// <param name="strPwd">原字符串</param>
5 /// <returns>加密後字符串</returns>
6 public static string GetMD5(string strPwd)
7 {
8 //MD5 對象創建的兩種方式
9 //MD5 md5 = MD5.Create();
10 MD5 md5 = new MD5CryptoServiceProvider();
11 //將輸入的密碼轉換成字節數組
12 byte[] bPwd = Encoding.UTF8.GetBytes(strPwd);
13 //計算指定字節數組的哈希值
14 byte[] bMD5 = md5.ComputeHash(bPwd);
15 //釋放加密服務提供類的所有資源
16 md5.Clear();
17 StringBuilder sbMD5Pwd = new StringBuilder();
18 for (int i = 0; i < bMD5.Length; i++)
19 {
20 //將每個字節數據轉換為2位的16進制的字符
21 sbMD5Pwd.Append(bMD5[i].ToString("x2"));
22 }
23 return sbMD5Pwd.ToString();
24 }
SHA1加密
1 /// <summary>
2 /// 使用 SHA1 加密算法來加密
3 /// </summary>
4 /// <param name="sourceString">原字符串</param>
5 /// <returns>加密後字符串</returns>
6 public static string SHA1_Encrypt(string sourceString)
7 {
8 byte[] StrRes = Encoding.UTF8.GetBytes(sourceString);
9 HashAlgorithm iSHA = new SHA1CryptoServiceProvider();
10 StrRes = iSHA.ComputeHash(StrRes);
11 StringBuilder EnText = new StringBuilder();
12 foreach (byte iByte in StrRes)
13 {
14 EnText.AppendFormat("{0:x2}", iByte);
15 }
16 return EnText.ToString();
17 }
SHA256加密
1 /// <summary>
2 /// SHA256 加密
3 /// </summary>
4 /// <param name="sourceString">原字符串</param>
5 /// <returns>加密後字符串</returns>
6 public static string SHA256_Encrypt(string sourceString)
7 {
8 byte[] data = Encoding.UTF8.GetBytes(sourceString);
9 SHA256 shaM = SHA256.Create();
10 byte[] result = shaM.ComputeHash(data);
11 StringBuilder EnText = new StringBuilder();
12 foreach (byte iByte in result)
13 {
14 EnText.AppendFormat("{0:x2}", iByte);
15 }
16 return EnText.ToString();
17 }
SHA384加密
1 /// <summary>
2 /// SHA384 加密
3 /// </summary>
4 /// <param name="sourceString">原字符串</param>
5 /// <returns>加密後字符串</returns>
6 public static string SHA384_Encrypt(string sourceString)
7 {
8 byte[] data = Encoding.UTF8.GetBytes(sourceString);
9 SHA384 shaM = SHA384.Create();
10 byte[] result = shaM.ComputeHash(data);
11 StringBuilder EnText = new StringBuilder();
12 foreach (byte iByte in result)
13 {
14 EnText.AppendFormat("{0:x2}", iByte);
15 }
16 return EnText.ToString();
17 }
SHA512加密
1 /// <summary>
2 /// SHA512_加密
3 /// </summary>
4 /// <param name="sourceString">原字符串</param>
5 /// <returns>加密後字符串</returns>
6 public static string SHA512_Encrypt(string sourceString)
7 {
8 byte[] data = Encoding.UTF8.GetBytes(sourceString);
9 SHA512 shaM = new SHA512Managed();
10 byte[] result = shaM.ComputeHash(data);
11 StringBuilder EnText = new StringBuilder();
12 foreach (byte iByte in result)
13 {
14 EnText.AppendFormat("{0:x2}", iByte);
15 }
16 return EnText.ToString();
17 }
AES加密、解密
1 /// <summary>
2 /// AES加密
3 /// </summary>
4 /// <param name="encryptStr">加密字符串</param>
5 /// <param name="encryptKey">密鑰</param>
6 /// <returns>密碼</returns>
7 public static string AESEncrypt(string encryptStr, string encryptKey)
8 {
9 if (string.IsNullOrWhiteSpace(encryptStr))
10 return string.Empty;
11
12 encryptKey = StringHelper.SubString(encryptKey, 32);
13 encryptKey = encryptKey.PadRight(32, ' ');
14
15 //分組加密算法
16 SymmetricAlgorithm des = Rijndael.Create();
17 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptStr);//得到需要加密的字節數組
18 //設置密鑰及密鑰向量
19 des.Key = Encoding.UTF8.GetBytes(encryptKey);
20 des.IV = _aeskeys;
21 byte[] cipherBytes = null;
22 using (MemoryStream ms = new MemoryStream())
23 {
24 using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
25 {
26 cs.Write(inputByteArray, 0, inputByteArray.Length);
27 cs.FlushFinalBlock();
28 cipherBytes = ms.ToArray();//得到加密後的字節數組
29 cs.Close();
30 ms.Close();
31 }
32 }
33 return Convert.ToBase64String(cipherBytes);
34 }
35
36 /// <summary>
37 /// AES解密
38 /// </summary>
39 /// <param name="decryptStr">解密字符串</param>
40 /// <param name="decryptKey">密鑰</param>
41 /// <returns>原碼</returns>
42 public static string AESDecrypt(string decryptStr, string decryptKey)
43 {
44 if (string.IsNullOrWhiteSpace(decryptStr))
45 return string.Empty;
46
47 decryptKey = StringHelper.SubString(decryptKey, 32);
48 decryptKey = decryptKey.PadRight(32, ' ');
49
50 byte[] cipherText = Convert.FromBase64String(decryptStr);
51
52 SymmetricAlgorithm des = Rijndael.Create();
53 des.Key = Encoding.UTF8.GetBytes(decryptKey);
54 des.IV = _aeskeys;
55 byte[] decryptBytes = new byte[cipherText.Length];
56 using (MemoryStream ms = new MemoryStream(cipherText))
57 {
58 using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Read))
59 {
60 cs.Read(decryptBytes, 0, decryptBytes.Length);
61 cs.Close();
62 ms.Close();
63 }
64 }
65 return Encoding.UTF8.GetString(decryptBytes).Replace("\0", "");//將字符串後尾的'\0'去掉
66 }
