public static KfxFile Create(ulong uVersion, byte[] pbKey, byte[] pbHash)
{
if (pbKey == null)
{
throw new ArgumentNullException("pbKey");
}
if (pbKey.Length == 0)
{
throw new ArgumentOutOfRangeException("pbKey");
}
if (uVersion == 0)
{
uVersion = 0x0002000000000000;
}
// Null hash: generate one, empty hash: store no hash
if (pbHash == null)
{
pbHash = HashData(pbKey);
}
VerifyHash(pbKey, pbHash);
KfxFile kf = new KfxFile();
if (uVersion == 0x0001000000000000)
{
kf.Meta.Version = "1.00"; // KeePass <= 2.46 used two zeros
}
else
{
kf.Meta.Version = StrUtil.VersionToString(uVersion, 2);
}
if (uVersion == 0x0001000000000000)
{
kf.Key.Data.Value = Convert.ToBase64String(pbKey);
}
else if (uVersion == 0x0002000000000000)
{
kf.Key.Data.Value = FormatKeyHex(pbKey, 3);
if (pbHash.Length != 0)
{
kf.Key.Data.Hash = MemUtil.ByteArrayToHexString(pbHash);
}
}
else
{
throw new NotSupportedException(KLRes.FileVersionUnsupported);
}
return(kf);
}
private static byte[] LoadKeyFileXml(byte[] pbFileData)
{
KfxFile kf;
try
{
using (MemoryStream ms = new MemoryStream(pbFileData, false))
{
kf = KfxFile.Load(ms);
}
}
catch (Exception) { return(null); }
// We have a syntactically valid XML key file;
// failing to verify the key should throw an exception
return((kf != null) ? kf.GetKey() : null);
}
internal static void Create(string strFilePath, byte[] pbAdditionalEntropy,
ulong uVersion)
{
byte[] pbRandom = CryptoRandom.Instance.GetRandomBytes(32);
if ((pbRandom == null) || (pbRandom.Length != 32))
{
throw new SecurityException();
}
byte[] pbKey;
if ((pbAdditionalEntropy == null) || (pbAdditionalEntropy.Length == 0))
{
pbKey = pbRandom;
}
else
{
int cbAdd = pbAdditionalEntropy.Length;
int cbRnd = pbRandom.Length;
byte[] pbCmp = new byte[cbAdd + cbRnd];
Array.Copy(pbAdditionalEntropy, 0, pbCmp, 0, cbAdd);
Array.Copy(pbRandom, 0, pbCmp, cbAdd, cbRnd);
pbKey = CryptoUtil.HashSha256(pbCmp);
MemUtil.ZeroByteArray(pbCmp);
}
KfxFile kf = KfxFile.Create(uVersion, pbKey, null);
IOConnectionInfo ioc = IOConnectionInfo.FromPath(strFilePath);
using (Stream s = IOConnection.OpenWrite(ioc))
{
kf.Save(s);
}
MemUtil.ZeroByteArray(pbKey);
MemUtil.ZeroByteArray(pbRandom);
}
