public Encryptor(CryptoAlgorithm algorithm, byte[] key)
{
SymmetricAlgorithm provider = SymmetricAlgorithm.Create(algorithm.ToString());
provider.Key = key;
provider.IV = new byte[] { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
encryptor = provider.CreateEncryptor();
decryptor = provider.CreateDecryptor();
}
public static AsymmetricCrypto CreateAsymmetric(CryptoAlgorithm algorithm)
{
if (algorithm != CryptoAlgorithm.RSA &&
algorithm != CryptoAlgorithm.DSA)
{
throw new NotSupportedException(SR.GetString(SRKind.AlgorithmNotSupported, algorithm));
}
return(Create(algorithm.ToString()) as AsymmetricCrypto);
}
public static HashCrypto CreateHash(CryptoAlgorithm algorithm)
{
if (algorithm != CryptoAlgorithm.MD5 &&
algorithm != CryptoAlgorithm.SHA1 &&
algorithm != CryptoAlgorithm.SHA256 &&
algorithm != CryptoAlgorithm.SHA384 &&
algorithm != CryptoAlgorithm.SHA512)
{
throw new NotSupportedException(SR.GetString(SRKind.AlgorithmNotSupported, algorithm));
}
return(Create(algorithm.ToString()) as HashCrypto);
}
public static SymmetricCrypto CreateSymmetric(CryptoAlgorithm algorithm)
{
if (algorithm != CryptoAlgorithm.DES &&
algorithm != CryptoAlgorithm.AES &&
algorithm != CryptoAlgorithm.RC2 &&
algorithm != CryptoAlgorithm.RC4 &&
algorithm != CryptoAlgorithm.Rijndael &&
algorithm != CryptoAlgorithm.TripleDES)
{
throw new NotSupportedException(SR.GetString(SRKind.AlgorithmNotSupported, algorithm));
}
return(Create(algorithm.ToString()) as SymmetricCrypto);
}
/// <summary>
/// 校验加密算法数据模式。
/// </summary>
/// <param name="dataMode"></param>
protected void ValidateDataMode(DataMode dataMode)
{
if (!AvailableDataModes.Contains(dataMode))
{
throw new NotSupportedException(string.Format("DataMode {0} & CrytoAlgorithm {1} not support!", dataMode.ToString(), CryptoAlgorithm.ToString()));
}
}
/// <summary>
/// 根据密码算法创建一个 <see cref="ICryptoProvider"/> 实例。
/// </summary>
/// <param name="algorithm">密码算法的类型。</param>
/// <returns>一个 <see cref="ICryptoProvider"/> 对象。</returns>
/// <exception cref="NotSupportedException">指定的 <paramref name="algorithm"/> 不支持。</exception>
public static ICryptoProvider Create(CryptoAlgorithm algorithm)
{
return(Create(algorithm.ToString()));
}