Lidarr/src/NzbDrone.Common/Crypto/HashProvider.cs

using System.Security.Cryptography;
using NzbDrone.Common.Disk;

namespace NzbDrone.Common.Crypto
{
    public interface IHashProvider
    {
        byte[] ComputeMd5(string path);
    }

    public class HashProvider : IHashProvider
    {
        private readonly IDiskProvider _diskProvider;

        public HashProvider(IDiskProvider diskProvider)
        {
            _diskProvider = diskProvider;
        }

        public byte[] ComputeMd5(string path)
        {
            using (var md5 = MD5.Create())
            {
                using (var stream = _diskProvider.OpenReadStream(path))
                {
                    return md5.ComputeHash(stream);
                }
            }
        }
    }
}