/// <summary>
/// Creates the SRP-6a parameters using the specified hash function.
/// </summary>
/// <typeparam name="T"><see cref="HashAlgorithm"/> implementation.</typeparam>
/// <param name="largeSafePrime">Large safe prime number N (hexadecimal).</param>
/// <param name="generator">The generator value modulo N (hexadecimal).</param>
/// <param name="paddedLength">The hexadecimal length of N and g.</param>
/// <param name="revision">Revision of SRP protocol, defaults to 6a if not provided.</param>
public static SrpParameters Create <T>(string largeSafePrime = null, string generator = null, int?paddedLength = null, SrpRevision?revision = null)
where T : HashAlgorithm
{
var result = new SrpParameters
{
Hasher = new SrpHash <T>(),
};
if (largeSafePrime != null)
{
result.Prime = SrpInteger.FromHex(largeSafePrime);
result.PaddedLength = result.Prime.HexLength.Value;
}
if (generator != null)
{
result.Generator = SrpInteger.FromHex(generator);
}
if (paddedLength.HasValue)
{
result.PaddedLength = paddedLength.Value;
}
if (revision.HasValue)
{
result.Revision = revision.Value;
}
return(result);
}
/// <summary> /// Checks if the given verifier value is a valid padded hexadecimal string. /// </summary> /// <param name="parameters">SRP parameters.</param> /// <param name="verifier">Password verifier.</param> /// <returns>True, if the verifier value is valid.</returns> public static bool IsValidVerifier(this SrpParameters parameters, string verifier) => IsValidInteger(verifier, parameters.PaddedLength);
/// <summary> /// Checks if the given salt value is a valid padded hexadecimal string. /// </summary> /// <param name="parameters">SRP parameters.</param> /// <param name="salt">Hexadecimal salt string.</param> /// <returns>True, if the salt value is valid.</returns> public static bool IsValidSalt(this SrpParameters parameters, string salt) => IsValidInteger(salt, parameters.HashSizeBytes * 2);
/// <summary>
/// Initializes a new instance of the <see cref="SrpClient"/> class.
/// </summary>
/// <param name="parameters">The parameters of the SRP-6a protocol.</param>
public SrpClient(SrpParameters parameters = null)
{
Parameters = parameters ?? new SrpParameters();
}
/// <summary>
/// Initializes a new instance of the <see cref="SrpServer"/> class.
/// </summary>
/// <param name="parameters">The parameters of the SRP-6a protocol.</param>
public SrpServer(SrpParameters parameters = null)
{
Parameters = parameters ?? new SrpParameters();
}
