public override void ConfirmPassword(String password, byte[] keySpec,
byte[] keySalt, byte[] verifier, byte[] verifierSalt,
byte[] integritySalt)
{
BinaryRC4EncryptionVerifier ver = builder.GetVerifier();
ver.SetSalt(verifierSalt);
ISecretKey skey = BinaryRC4Decryptor.GenerateSecretKey(password, ver);
SetSecretKey(skey);
try
{
Cipher cipher = BinaryRC4Decryptor.InitCipherForBlock(null, 0, builder, skey, Cipher.ENCRYPT_MODE);
byte[] encryptedVerifier = new byte[16];
cipher.Update(verifier, 0, 16, encryptedVerifier);
ver.EncryptedVerifier = (encryptedVerifier);
HashAlgorithm hashAlgo = ver.HashAlgorithm;
MessageDigest hashAlg = CryptoFunctions.GetMessageDigest(hashAlgo);
byte[] calcVerifierHash = hashAlg.Digest(verifier);
byte[] encryptedVerifierHash = cipher.DoFinal(calcVerifierHash);
ver.EncryptedVerifierHash = (encryptedVerifierHash);
}
catch (Exception e)
{
throw new EncryptedDocumentException("Password Confirmation failed", e);
}
}
public void Initialize(EncryptionInfo info,
CipherAlgorithm cipherAlgorithm, HashAlgorithm hashAlgorithm,
int keyBits, int blockSize, ChainingMode chainingMode)
{
this.info = info;
header = new BinaryRC4EncryptionHeader();
verifier = new BinaryRC4EncryptionVerifier();
decryptor = new BinaryRC4Decryptor(this);
encryptor = new BinaryRC4Encryptor(this);
}
public void Initialize(EncryptionInfo info, ILittleEndianInput dis)
{
this.info = info;
int vMajor = info.VersionMajor;
int vMinor = info.VersionMinor;
Debug.Assert(vMajor == 1 && vMinor == 1);
header = new BinaryRC4EncryptionHeader();
verifier = new BinaryRC4EncryptionVerifier(dis);
decryptor = new BinaryRC4Decryptor(this);
encryptor = new BinaryRC4Encryptor(this);
}
protected override Cipher InitCipherForBlock(Cipher cipher, int block, bool lastChunk)
{
return(BinaryRC4Decryptor.InitCipherForBlock(cipher, block, builder, encryptor.GetSecretKey(), Cipher.ENCRYPT_MODE));
}
protected override Cipher InitCipherForBlock(Cipher existing, int block)
{
return(BinaryRC4Decryptor.InitCipherForBlock(existing, block,
decryptor.builder, decryptor.GetSecretKey(), Cipher.DECRYPT_MODE));
}