Examples with DataFormatException net.i2p.data.DataFormatException used on opensource projects

Example 96 with DataFormatException

use of net.i2p.data.DataFormatException in project i2p.i2p by i2p.

the class ElGamalTest method testElGamal.

public void testElGamal() {
    for (int i = 0; i < 2; i++) {
        Object[] keys = KeyGenerator.getInstance().generatePKIKeypair();
        PublicKey pubKey = (PublicKey) keys[0];
        PrivateKey privKey = (PrivateKey) keys[1];
        SessionKey key = KeyGenerator.getInstance().generateSessionKey();
        ByteArrayOutputStream elgSrc = new ByteArrayOutputStream(256);
        try {
            key.writeBytes(elgSrc);
        } catch (DataFormatException dfe) {
            dfe.printStackTrace();
            fail();
        } catch (IOException ioe) {
            ioe.printStackTrace();
            fail();
        }
        byte[] preIV = new byte[32];
        RandomSource.getInstance().nextBytes(preIV);
        try {
            elgSrc.write(preIV);
            elgSrc.flush();
        } catch (IOException ioe) {
            ioe.printStackTrace();
            fail();
        }
        byte[] elgEncr = _context.elGamalEngine().encrypt(elgSrc.toByteArray(), pubKey);
        byte[] elgDecr = _context.elGamalEngine().decrypt(elgEncr, privKey);
        ByteArrayInputStream bais = new ByteArrayInputStream(elgDecr);
        SessionKey nk = new SessionKey();
        try {
            nk.readBytes(bais);
        } catch (DataFormatException dfe) {
            dfe.printStackTrace();
            fail();
        } catch (IOException ioe) {
            ioe.printStackTrace();
            fail();
        }
        byte[] postpreIV = new byte[32];
        int read = 0;
        try {
            read = bais.read(postpreIV);
        } catch (IOException ioe) {
            ioe.printStackTrace();
            fail();
        }
        assertEquals(read, postpreIV.length);
        assertTrue(DataHelper.eq(preIV, postpreIV));
        assertEquals(key, nk);
    }
}

Example 97 with DataFormatException

use of net.i2p.data.DataFormatException in project i2p.i2p by i2p.

the class ElGamalTest method testLoop.

public void testLoop() {
    for (int i = 0; i < 5; i++) {
        Object[] keys = KeyGenerator.getInstance().generatePKIKeypair();
        PublicKey pubKey = (PublicKey) keys[0];
        PrivateKey privKey = (PrivateKey) keys[1];
        byte[] msg = new byte[400];
        RandomSource.getInstance().nextBytes(msg);
        SessionKey key = _context.sessionKeyManager().getCurrentKey(pubKey);
        if (key == null)
            key = _context.sessionKeyManager().createSession(pubKey);
        byte[] encrypted = _context.elGamalAESEngine().encrypt(msg, pubKey, key, null, null, 1024);
        byte[] decrypted = null;
        try {
            decrypted = _context.elGamalAESEngine().decrypt(encrypted, privKey, _context.sessionKeyManager());
        } catch (DataFormatException dfe) {
            dfe.printStackTrace();
            fail();
        }
        assertTrue(DataHelper.eq(msg, decrypted));
    }
}

Example 98 with DataFormatException

use of net.i2p.data.DataFormatException in project i2p.i2p by i2p.

the class BlockfileNamingService method readProperties.

/**
 * Same as DataHelper.readProperties, UTF-8, unsorted,
 * except that values may up to 4K bytes.
 *
 * Throws DataFormatException on duplicate key
 *
 * @param in stream to read the mapping from
 * @throws DataFormatException if the format is invalid
 * @throws IOException if there is a problem reading the data
 * @return a Properties
 * @since 0.9.26
 */
public static Properties readProperties(ByteArrayInputStream in) throws DataFormatException, IOException {
    Properties props = new Properties();
    int size = (int) DataHelper.readLong(in, 2);
    // this doesn't prevent reading past the end on corruption
    int ignore = in.available() - size;
    while (in.available() > ignore) {
        String key = DataHelper.readString(in);
        int b = in.read();
        if (b != '=')
            throw new DataFormatException("Bad key " + b);
        String val = readLongString(in);
        b = in.read();
        if (b != ';')
            throw new DataFormatException("Bad value");
        Object old = props.put(key, val);
        if (old != null)
            throw new DataFormatException("Duplicate key " + key);
    }
    return props;
}

Example 99 with DataFormatException

use of net.i2p.data.DataFormatException in project i2p.i2p by i2p.

the class BlockfileNamingService method writeProperties.

/**
 * Same as DataHelper.writeProperties, UTF-8, unsorted,
 * except that values may up to 4K bytes.
 *
 * @param props source may be null
 * @throws DataFormatException if any key string is over 255 bytes long,
 *                             if any value string is over 4096 bytes long, or if the total length
 *                             (not including the two length bytes) is greater than 65535 bytes.
 * @since 0.9.26
 */
private static void writeProperties(ByteArrayOutputStream rawStream, Properties p) throws DataFormatException, IOException {
    if (p != null && !p.isEmpty()) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream(p.size() * 32);
        for (Map.Entry<Object, Object> entry : p.entrySet()) {
            String key = (String) entry.getKey();
            String val = (String) entry.getValue();
            DataHelper.writeStringUTF8(baos, key);
            baos.write('=');
            writeLongStringUTF8(baos, val);
            baos.write(';');
        }
        if (baos.size() > 65535)
            throw new DataFormatException("Properties too big (65535 max): " + baos.size());
        byte[] propBytes = baos.toByteArray();
        DataHelper.writeLong(rawStream, 2, propBytes.length);
        rawStream.write(propBytes);
    } else {
        DataHelper.writeLong(rawStream, 2, 0);
    }
}

Example 100 with DataFormatException

use of net.i2p.data.DataFormatException in project i2p.i2p by i2p.

the class BlockfileNamingService method readLongString.

/**
 * Same as DataHelper.readString, except that
 * strings up to 4K bytes are allowed.
 * Format is: one-byte length + data, or 0xff + two-byte length + data
 *
 * @param in stream to read from
 * @throws DataFormatException if the stream doesn't contain a validly formatted string
 * @throws EOFException if there aren't enough bytes to read the string
 * @throws IOException if there is an IO error reading the string
 * @return UTF-8 string
 */
private static String readLongString(ByteArrayInputStream in) throws DataFormatException, IOException {
    int size = in.read();
    if (size < 0)
        throw new EOFException("EOF reading string");
    if (size == 0xff) {
        size = (int) DataHelper.readLong(in, 2);
        if (size > MAX_VALUE_LENGTH)
            throw new DataFormatException(MAX_VALUE_LENGTH + " max, but this is " + size);
    }
    if (size == 0)
        return "";
    byte[] raw = new byte[size];
    int read = DataHelper.read(in, raw);
    if (read != size)
        throw new EOFException("EOF reading string");
    return new String(raw, "UTF-8");
}