public V2DocumentHeaders(EncryptionParameters encryptionParameters, long keyWrapIterations)
{
if (encryptionParameters == null)
{
throw new ArgumentNullException("encryptionParameters");
}
_headers = new Headers();
_headers.HeaderBlocks.Add(new PreambleHeaderBlock());
_headers.HeaderBlocks.Add(new VersionHeaderBlock(_version));
ICryptoFactory cryptoFactory = Resolve.CryptoFactory.Create(encryptionParameters.CryptoId);
IDerivedKey keyEncryptingKey = cryptoFactory.CreateDerivedKey(encryptionParameters.Passphrase);
V2KeyWrapHeaderBlock keyWrap = new V2KeyWrapHeaderBlock(cryptoFactory, keyEncryptingKey, keyWrapIterations);
_headers.HeaderBlocks.Add(keyWrap);
_keyStreamFactory = keyWrap;
foreach (UserPublicKey publicKey in encryptionParameters.PublicKeys)
{
_headers.HeaderBlocks.Add(new V2AsymmetricKeyWrapHeaderBlock(publicKey, keyWrap.MasterKey, keyWrap.MasterIV));
}
_headers.HeaderBlocks.Add(new V2AsymmetricRecipientsEncryptedHeaderBlock(GetHeaderCrypto(HeaderBlockType.AsymmetricRecipients))
{
Recipients = new Recipients(encryptionParameters.PublicKeys)
});
_headers.HeaderBlocks.Add(new FileInfoEncryptedHeaderBlock(GetHeaderCrypto(HeaderBlockType.FileInfo)));
_headers.HeaderBlocks.Add(new V2CompressionEncryptedHeaderBlock(GetHeaderCrypto(HeaderBlockType.Compression)));
_headers.HeaderBlocks.Add(new V2UnicodeFileNameInfoEncryptedHeaderBlock(GetHeaderCrypto(HeaderBlockType.UnicodeFileNameInfo)));
_headers.HeaderBlocks.Add(new V2AlgorithmVerifierEncryptedHeaderBlock(GetHeaderCrypto(HeaderBlockType.AlgorithmVerifier)));
_headers.HeaderBlocks.Add(new DataHeaderBlock());
SetDataEncryptingCryptoForEncryptedHeaderBlocks(_headers.HeaderBlocks);
}
private bool IsMasterKeyKnown(Headers headers)
{
V2KeyWrapHeaderBlock keyHeaderBlock = headers.FindHeaderBlock <V2KeyWrapHeaderBlock>();
if (keyHeaderBlock.MasterKey != null)
{
return(true);
}
if (_keyStreamFactory != null && _keyStreamFactory.Crypto(0) != null)
{
return(true);
}
return(false);
}
public override object Clone()
{
V2KeyWrapHeaderBlock block = new V2KeyWrapHeaderBlock((byte[])GetDataBlockBytesReference().Clone());
return(block);
}
