public void Initialize(EncryptionInfo info, ILittleEndianInput dis)
{
this.info = info;
EncryptionDocument ed = ParseDescriptor((DocumentInputStream)dis);
header = new AgileEncryptionHeader(ed);
verifier = new AgileEncryptionVerifier(ed);
if (info.VersionMajor == EncryptionMode.Agile.VersionMajor &&
info.VersionMinor == EncryptionMode.Agile.VersionMinor)
{
decryptor = new AgileDecryptor(this);
encryptor = new AgileEncryptor(this);
}
}
public void Initialize(EncryptionInfo info, CipherAlgorithm cipherAlgorithm, HashAlgorithm hashAlgorithm, int keyBits, int blockSize, ChainingMode chainingMode)
{
this.info = info;
if (cipherAlgorithm == null)
{
cipherAlgorithm = CipherAlgorithm.aes128;
}
if (cipherAlgorithm == CipherAlgorithm.rc4)
{
throw new EncryptedDocumentException("RC4 must not be used with agile encryption.");
}
if (hashAlgorithm == null)
{
hashAlgorithm = HashAlgorithm.sha1;
}
if (chainingMode == null)
{
chainingMode = ChainingMode.cbc;
}
if (!(chainingMode == ChainingMode.cbc || chainingMode == ChainingMode.cfb))
{
throw new EncryptedDocumentException("Agile encryption only supports CBC/CFB chaining.");
}
if (keyBits == -1)
{
keyBits = cipherAlgorithm.defaultKeySize;
}
if (blockSize == -1)
{
blockSize = cipherAlgorithm.blockSize;
}
bool found = false;
foreach (int ks in cipherAlgorithm.allowedKeySize)
{
found |= (ks == keyBits);
}
if (!found)
{
throw new EncryptedDocumentException("KeySize " + keyBits + " not allowed for Cipher " + cipherAlgorithm.ToString());
}
header = new AgileEncryptionHeader(cipherAlgorithm, hashAlgorithm, keyBits, blockSize, chainingMode);
verifier = new AgileEncryptionVerifier(cipherAlgorithm, hashAlgorithm, keyBits, blockSize, chainingMode);
decryptor = new AgileDecryptor(this);
encryptor = new AgileEncryptor(this);
}
public AgileCipherOutputStream(DirectoryNode dir, IEncryptionInfoBuilder builder, ISecretKey skey, AgileEncryptor encryptor)
: base(dir, 4096, builder, encryptor)
{
this.builder = builder;
this.skey = skey;
this.encryptor = encryptor;
}
