[.Net] 字串加解密

public static string encode(string code) {

CAPICOM.EncryptedData oCrypt = new CAPICOM.EncryptedData();

oCrypt.Content = code;

oCrypt.Algorithm.KeyLength = CAPICOM.CAPICOM_ENCRYPTION_KEY_LENGTH.CAPICOM_ENCRYPTION_KEY_LENGTH_40_BITS; oCrypt.Algorithm.Name = CAPICOM.CAPICOM_ENCRYPTION_ALGORITHM.CAPICOM_ENCRYPTION_ALGORITHM_DES; oCrypt.SetSecret(format, CAPICOM.CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD);

return oCrypt.Encrypt(CAPICOM.CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64);

}

public static string decode(string code) {

CAPICOM.EncryptedData oDecrypt = new CAPICOM.EncryptedData(); oDecrypt.Algorithm.KeyLength = CAPICOM.CAPICOM_ENCRYPTION_KEY_LENGTH.CAPICOM_ENCRYPTION_KEY_LENGTH_40_BITS; oDecrypt.Algorithm.Name = CAPICOM.CAPICOM_ENCRYPTION_ALGORITHM.CAPICOM_ENCRYPTION_ALGORITHM_DES; oDecrypt.SetSecret(format, CAPICOM.CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD); oDecrypt.Decrypt(code);

return oDecrypt.Content;

}

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public static string encode(string code) {

byte[] strByte = Encoding.Default.GetBytes(code);

return Convert.ToBase64String(strByte);
}
public static string decode(string code) {

try {

byte[] strByte = Convert.FromBase64String(code);

return Encoding.Default.GetString(strByte);

}

catch (Exception e) { return ""; }

}