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using System.Text;
using System.Security.Cryptography;
using Duplicati.Library.Utility;

public static class HashExtentions
{

    /// <summary>
    /// Computes the hash of the given string using the given hash algorithm
    /// </summary>
    /// <param name="value">string to be hashed</param>
    /// <param name="hashAlgorithm">hash algoritm instance to be used</param>
    /// <returns></returns>
    public static byte[] ComputeHash(this string value, HashAlgorithm hashAlgorithm)
    {
        return hashAlgorithm.ComputeHash(Encoding.UTF8.GetBytes(value));
    }

    /// <summary>
    /// Computes the hash of the given string using the given hash algorithm and returns it as a hex string
    /// </summary>
    /// <param name="value">string to be hashed</param>
    /// <param name="hashAlgorithm">hash algoritm instance to be used</param>
    /// <returns></returns>
    public static string ComputeHashToHex(this string value, HashAlgorithm hashAlgorithm)
    {
        return Utility.ByteArrayAsHexString(ComputeHash(value, hashAlgorithm));
    }
}