/// <inheritdoc/>
public string Create(string value, uint length)
{
Guard.MustBeBetweenOrEqualTo <uint>(length, 2, 64, nameof(length));
using (var hashAlgorithm = SHA256.Create())
{
int len = (int)length;
// Concatenate the hash bytes into one long string.
int byteCount = Encoding.ASCII.GetByteCount(value);
byte[] buffer = ArrayPool <byte> .Shared.Rent(byteCount);
Encoding.ASCII.GetBytes(value, 0, value.Length, buffer, 0);
byte[] hash = hashAlgorithm.ComputeHash(buffer, 0, byteCount);
ArrayPool <byte> .Shared.Return(buffer);
var sb = new StringBuilder(len);
for (int i = 0; i < len / 2; i++)
{
sb.Append(hash[i].ToString("X2"));
}
sb.AppendFormat(".{0}", FormatHelpers.GetExtensionOrDefault(this.options.Configuration, value));
return(sb.ToString());
}
}
/// <inheritdoc/>
public string Create(string value, uint length)
{
if (length.CompareTo(2) < 0 || length.CompareTo(64) > 0)
{
throw new ArgumentOutOfRangeException(nameof(length), $"Value must be greater than or equal to {2} and less than or equal to {64}.");
}
using (var hashAlgorithm = SHA256.Create())
{
// Concatenate the hash bytes into one long string.
int len = (int)length;
byte[] hash = hashAlgorithm.ComputeHash(Encoding.ASCII.GetBytes(value));
var sb = new StringBuilder(len);
for (int i = 0; i < len / 2; i++)
{
sb.Append(hash[i].ToString("X2"));
}
sb.AppendFormat(".{0}", FormatHelpers.GetExtensionOrDefault(this.options.Configuration, value));
return(sb.ToString());
}
}
/// <summary>
/// Computes a hashed value for the given uri string.
/// </summary>
/// <param name="uri">The uri to hash.</param>
/// <param name="configuration">The library configuration.</param>
/// <returns>The hashed <see cref="string"/></returns>
public static string ComputeHash(string uri, Configuration configuration)
{
using (var hashAlgorithm = SHA256.Create())
{
return($"{Encode(hashAlgorithm.ComputeHash(Encoding.ASCII.GetBytes(uri)))}.{FormatHelpers.GetExtensionOrDefault(configuration, uri)}");
}
}
