public static string Encrypt(ShaMode mode, string input)
{
switch (mode)
{
case ShaMode.SHA256:
using (SHA256Managed sha = new SHA256Managed())
{
return(BitConverter.ToString(sha.ComputeHash(Encoding.ASCII.GetBytes(input))).Replace("-", "").ToLower());
}
case ShaMode.SHA512:
using (SHA512Managed sha = new SHA512Managed())
{
return(BitConverter.ToString(sha.ComputeHash(Encoding.ASCII.GetBytes(input))).Replace("-", "").ToLower());
}
default:
return(string.Empty);
}
}
/// <summary>
/// 以指定的编码方式计算字符串指定模式的SHA值。
/// </summary>
/// <param name="input">需要计算SHA值的字符串。</param>
/// <param name="encoding">字符串的编码方式。</param>
/// <param name="mode">计算SHA的模式。</param>
/// <returns>字符串对应的SHA值。</returns>
/// <exception cref="ArgumentNullException">参数encoding为null时将抛出该异常。</exception>
/// <exception cref="ArgumentException">传入不能识别的ShaMode时将抛出该异常。</exception>
public static string ComputeSha(string input, Encoding encoding, ShaMode mode)
{
int length = Convert.ToInt32(mode);
if (string.IsNullOrEmpty(input))
{
return(string.Empty.PadLeft(length, '0'));
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
byte[] buffer = encoding.GetBytes(input);
StringBuilder builder = new StringBuilder(length);
using (HashAlgorithm provider = Encryption.CreateShaProvider(mode)) {
byte[] result = provider.ComputeHash(buffer);
for (int i = 0; i < result.Length; i++)
{
builder.Append(result[i].ToString("X2"));
}
}
return(builder.ToString());
}
/// <summary>
/// 以UTF-8编码计算字符串指定模式的SHA值。
/// </summary>
/// <param name="input">需要计算SHA值的字符串。</param>
/// <param name="mode">计算SHA的模式。</param>
/// <returns>字符串对应的SHA值。</returns>
/// <exception cref="ArgumentException">传入不能识别的ShaMode时将抛出该异常。</exception>
public static string ComputeSha(string input, ShaMode mode)
{
return(Encryption.ComputeSha(input, Encoding.UTF8, mode));
}
