public
class
TrialHelper
{
private
static
byte
[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
/// <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
{
if
(
string
.IsNullOrEmpty(encryptKey) || encryptKey.Length < 8)
{
encryptKey =
"winform01"
;
}
byte
[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte
[] rgbIV = Keys;
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
{
if
(
string
.IsNullOrEmpty(decryptKey) || decryptKey.Length < 8)
{
decryptKey =
"winform01"
;
}
byte
[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
byte
[] rgbIV = Keys;
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>
/// MD5数据加密
/// </summary>
/// <param name="sDataIn">加密字段</param>
/// <returns>加密后的字符串</returns>
public
static
string
GetMD5(
string
sDataIn )
{
System.Security.Cryptography.MD5CryptoServiceProvider md5 =
new
System.Security.Cryptography.MD5CryptoServiceProvider();
byte
[] bytValue, bytHash;
bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);
bytHash = md5.ComputeHash(bytValue);
md5.Clear();
string
sTemp =
""
;
for
(
int
i = 0; i < bytHash.Length; i++)
{
sTemp += bytHash[i].ToString(
"x"
).PadLeft(2,
'0'
);
}
return
sTemp;
}
}