Examples with PwDbOutputException com.keepassdroid.database.exception.PwDbOutputException used on opensource projects

Example 11 with PwDbOutputException

use of com.keepassdroid.database.exception.PwDbOutputException in project keepass2android by PhilippC.

the class PwDbOutput method setIVs.

protected SecureRandom setIVs(PwDbHeader header) throws PwDbOutputException {
    SecureRandom random;
    try {
        random = SecureRandom.getInstance("SHA1PRNG");
    } catch (NoSuchAlgorithmException e) {
        throw new PwDbOutputException("Does not support secure random number generation.");
    }
    random.nextBytes(header.encryptionIV);
    random.nextBytes(header.masterSeed);
    random.nextBytes(header.transformSeed);
    return random;
}

Example 12 with PwDbOutputException

use of com.keepassdroid.database.exception.PwDbOutputException in project keepass2android by PhilippC.

the class PwDbV3Output method output.

@Override
public void output() throws PwDbOutputException {
    prepForOutput();
    PwDbHeader header = outputHeader(mOS);
    byte[] finalKey = getFinalKey(header);
    Cipher cipher;
    try {
        if (mPM.algorithm == PwEncryptionAlgorithm.Rjindal) {
            cipher = CipherFactory.getInstance("AES/CBC/PKCS5Padding");
        } else if (mPM.algorithm == PwEncryptionAlgorithm.Twofish) {
            cipher = CipherFactory.getInstance("TWOFISH/CBC/PKCS7PADDING");
        } else {
            throw new Exception();
        }
    } catch (Exception e) {
        throw new PwDbOutputException("Algorithm not supported.");
    }
    try {
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(finalKey, "AES"), new IvParameterSpec(header.encryptionIV));
        CipherOutputStream cos = new CipherOutputStream(mOS, cipher);
        BufferedOutputStream bos = new BufferedOutputStream(cos);
        outputPlanGroupAndEntries(bos);
        bos.flush();
        bos.close();
    } catch (InvalidKeyException e) {
        throw new PwDbOutputException("Invalid key");
    } catch (InvalidAlgorithmParameterException e) {
        throw new PwDbOutputException("Invalid algorithm parameter.");
    } catch (IOException e) {
        throw new PwDbOutputException("Failed to output final encrypted part.");
    }
}

Example 13 with PwDbOutputException

use of com.keepassdroid.database.exception.PwDbOutputException in project keepass2android by PhilippC.

the class PwDbV3Output method outputHeader.

public PwDbHeader outputHeader(OutputStream os) throws PwDbOutputException {
    // Build header
    PwDbHeaderV3 header = new PwDbHeaderV3();
    header.signature1 = PwDbHeader.PWM_DBSIG_1;
    header.signature2 = PwDbHeaderV3.DBSIG_2;
    header.flags = PwDbHeaderV3.FLAG_SHA2;
    if (mPM.getEncAlgorithm() == PwEncryptionAlgorithm.Rjindal) {
        header.flags |= PwDbHeaderV3.FLAG_RIJNDAEL;
    } else if (mPM.getEncAlgorithm() == PwEncryptionAlgorithm.Twofish) {
        header.flags |= PwDbHeaderV3.FLAG_TWOFISH;
    } else {
        throw new PwDbOutputException("Unsupported algorithm.");
    }
    header.version = PwDbHeaderV3.DBVER_DW;
    header.numGroups = mPM.getGroups().size();
    header.numEntries = mPM.entries.size();
    header.numKeyEncRounds = mPM.getNumKeyEncRecords();
    setIVs(header);
    // Write checksum Checksum
    MessageDigest md = null;
    try {
        md = MessageDigest.getInstance("SHA-256");
    } catch (NoSuchAlgorithmException e) {
        throw new PwDbOutputException("SHA-256 not implemented here.");
    }
    NullOutputStream nos;
    nos = new NullOutputStream();
    DigestOutputStream dos = new DigestOutputStream(nos, md);
    BufferedOutputStream bos = new BufferedOutputStream(dos);
    try {
        outputPlanGroupAndEntries(bos);
        bos.flush();
        bos.close();
    } catch (IOException e) {
        throw new PwDbOutputException("Failed to generate checksum.");
    }
    header.contentsHash = md.digest();
    // Output header
    PwDbHeaderOutputV3 pho = new PwDbHeaderOutputV3(header, os);
    try {
        pho.output();
    } catch (IOException e) {
        throw new PwDbOutputException("Failed to output the header.");
    }
    return header;
}

Example 14 with PwDbOutputException

use of com.keepassdroid.database.exception.PwDbOutputException in project keepass2android by PhilippC.

the class PwDbV3Output method outputPlanGroupAndEntries.

public void outputPlanGroupAndEntries(OutputStream os) throws PwDbOutputException {
    // long size = 0;
    // Groups
    List<PwGroupV3> groups = mPM.getGroups();
    for (int i = 0; i < groups.size(); i++) {
        PwGroupV3 pg = (PwGroupV3) groups.get(i);
        PwGroupOutputV3 pgo = new PwGroupOutputV3(pg, os);
        try {
            pgo.output();
        } catch (IOException e) {
            throw new PwDbOutputException("Failed to output a group: " + e.getMessage());
        }
    }
    // Entries
    for (int i = 0; i < mPM.entries.size(); i++) {
        PwEntryV3 pe = (PwEntryV3) mPM.entries.get(i);
        PwEntryOutputV3 peo = new PwEntryOutputV3(pe, os);
        try {
            peo.output();
        } catch (IOException e) {
            throw new PwDbOutputException("Failed to output an entry.");
        }
    }
}