public Key DeriveKey(
SharedSecret sharedSecret,
ReadOnlySpan <byte> salt,
ReadOnlySpan <byte> info,
Algorithm algorithm,
KeyFlags flags = KeyFlags.None)
{
if (sharedSecret == null)
{
throw Error.ArgumentNull_SharedSecret(nameof(sharedSecret));
}
if (!_supportsSalt && !salt.IsEmpty)
{
throw Error.Argument_SaltNotSupported(nameof(salt));
}
if (algorithm == null)
{
throw Error.ArgumentNull_Algorithm(nameof(algorithm));
}
int keySize = algorithm.GetDefaultKeySize();
if (keySize > MaxOutputSize)
{
throw Error.NotSupported_CreateKey();
}
SecureMemoryHandle keyHandle = null;
byte[] publicKeyBytes = null;
bool success = false;
try
{
SecureMemoryHandle.Alloc(keySize, out keyHandle);
DeriveKeyCore(sharedSecret.Handle, salt, info, keyHandle);
algorithm.CreateKey(keyHandle, out publicKeyBytes);
success = true;
}
finally
{
if (!success && keyHandle != null)
{
keyHandle.Dispose();
}
}
return(new Key(algorithm, flags, keyHandle, publicKeyBytes));
}
public Key(
Algorithm algorithm,
KeyFlags flags = KeyFlags.None)
{
if (algorithm == null)
{
throw Error.ArgumentNull_Algorithm(nameof(algorithm));
}
int keySize = algorithm.GetDefaultKeySize();
SecureMemoryHandle keyHandle = null;
byte[] publicKeyBytes = null;
bool success = false;
try
{
SecureMemoryHandle.Alloc(keySize, out keyHandle);
SecureRandom.GenerateKeyCore(keyHandle);
algorithm.CreateKey(keyHandle, out publicKeyBytes);
success = true;
}
finally
{
if (!success && keyHandle != null)
{
keyHandle.Dispose();
}
}
keyHandle.MakeReadOnly();
_algorithm = algorithm;
_flags = flags;
_handle = keyHandle;
_publicKey = (publicKeyBytes) != null ? new PublicKey(algorithm, publicKeyBytes) : null;
}