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

Example 11 with DataFormatException

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

the class SU3File method verifyAndMigrate.

/**
 *  One-pass verify and extract the content.
 *  Recommend extracting to a temp location as the sig is not checked until
 *  after extraction. This will delete the file if the sig does not verify.
 *  Throws IOE on all format errors.
 *
 *  @param migrateTo the output file, probably in zip format. Null for verify only.
 *  @return true if signature is good
 */
public boolean verifyAndMigrate(File migrateTo) throws IOException {
    InputStream in = null;
    FileOutputStream out = null;
    boolean rv = false;
    try {
        in = new BufferedInputStream(new FileInputStream(_file));
        // read 10 bytes to get the sig type
        in.mark(10);
        // following is a dup of that in verifyHeader()
        byte[] magic = new byte[MAGIC_BYTES.length];
        DataHelper.read(in, magic);
        if (!DataHelper.eq(magic, MAGIC_BYTES))
            throw new IOException("Not an su3 file");
        skip(in, 1);
        int foo = in.read();
        if (foo != FILE_VERSION)
            throw new IOException("bad file version");
        skip(in, 1);
        int sigTypeCode = in.read();
        _sigType = SigType.getByCode(sigTypeCode);
        if (_sigType == null)
            throw new IOException("unknown sig type: " + sigTypeCode);
        // end duplicate code
        // rewind
        in.reset();
        MessageDigest md = _sigType.getDigestInstance();
        DigestInputStream din = new DigestInputStream(in, md);
        in = din;
        if (!_headerVerified)
            verifyHeader(in);
        else
            skip(in, getContentOffset());
        if (_verifySignature) {
            if (_signerPubkey == null)
                throw new IOException("unknown signer: " + _signer + " for content type: " + _contentType.getName());
        }
        if (// else verify only
        migrateTo != null)
            out = new SecureFileOutputStream(migrateTo);
        byte[] buf = new byte[16 * 1024];
        long tot = 0;
        while (tot < _contentLength) {
            int read = in.read(buf, 0, (int) Math.min(buf.length, _contentLength - tot));
            if (read < 0)
                throw new EOFException();
            if (// else verify only
            migrateTo != null)
                out.write(buf, 0, read);
            tot += read;
        }
        if (_verifySignature) {
            byte[] sha = md.digest();
            din.on(false);
            Signature signature = new Signature(_sigType);
            signature.readBytes(in);
            int avail = in.available();
            if (avail > 0)
                throw new IOException(avail + " bytes data after sig");
            SimpleDataStructure hash = _sigType.getHashInstance();
            hash.setData(sha);
            // System.out.println("hash\n" + HexDump.dump(sha));
            // System.out.println("sig\n" + HexDump.dump(signature.getData()));
            rv = _context.dsa().verifySignature(signature, hash, _signerPubkey);
        } else {
            rv = true;
        }
    } catch (DataFormatException dfe) {
        IOException ioe = new IOException("foo");
        ioe.initCause(dfe);
        throw ioe;
    } finally {
        if (in != null)
            try {
                in.close();
            } catch (IOException ioe) {
            }
        if (out != null) {
            // so do a POSIX flush and sync to ensure it will be there.
            try {
                out.flush();
                out.getFD().sync();
            } catch (IOException ioe) {
            }
            try {
                out.close();
            } catch (IOException ioe) {
            }
        }
        if (migrateTo != null && !rv)
            migrateTo.delete();
    }
    return rv;
}

Example 12 with DataFormatException

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

the class SU3File method write.

/**
 *  One-pass wrap and sign the content.
 *  Writes to the file specified in the constructor.
 *  Throws on all errors.
 *
 *  @param content the input file, probably in zip format
 *  @param fileType 0-255, 0 for zip
 *  @param contentType 0-255
 *  @param version 1-255 bytes when converted to UTF-8
 *  @param signer ID of the public key, 1-255 bytes when converted to UTF-8
 */
public void write(File content, int fileType, int contentType, String version, String signer, PrivateKey privkey, SigType sigType) throws IOException {
    InputStream in = null;
    DigestOutputStream out = null;
    boolean ok = false;
    try {
        in = new BufferedInputStream(new FileInputStream(content));
        MessageDigest md = sigType.getDigestInstance();
        out = new DigestOutputStream(new BufferedOutputStream(new FileOutputStream(_file)), md);
        out.write(MAGIC_BYTES);
        out.write((byte) 0);
        out.write((byte) FILE_VERSION);
        DataHelper.writeLong(out, 2, sigType.getCode());
        DataHelper.writeLong(out, 2, sigType.getSigLen());
        out.write((byte) 0);
        byte[] verBytes = DataHelper.getUTF8(version);
        if (verBytes.length == 0 || verBytes.length > 255)
            throw new IllegalArgumentException("bad version length");
        int verLen = Math.max(verBytes.length, MIN_VERSION_BYTES);
        out.write((byte) verLen);
        out.write((byte) 0);
        byte[] signerBytes = DataHelper.getUTF8(signer);
        if (signerBytes.length == 0 || signerBytes.length > 255)
            throw new IllegalArgumentException("bad signer length");
        out.write((byte) signerBytes.length);
        long contentLength = content.length();
        if (contentLength <= 0)
            throw new IllegalArgumentException("No content");
        DataHelper.writeLong(out, 8, contentLength);
        out.write((byte) 0);
        if (fileType < 0 || fileType > 255)
            throw new IllegalArgumentException("bad content type");
        out.write((byte) fileType);
        out.write((byte) 0);
        if (contentType < 0 || contentType > 255)
            throw new IllegalArgumentException("bad content type");
        out.write((byte) contentType);
        out.write(new byte[12]);
        out.write(verBytes);
        if (verBytes.length < MIN_VERSION_BYTES)
            out.write(new byte[MIN_VERSION_BYTES - verBytes.length]);
        out.write(signerBytes);
        byte[] buf = new byte[16 * 1024];
        long tot = 0;
        while (tot < contentLength) {
            int read = in.read(buf, 0, (int) Math.min(buf.length, contentLength - tot));
            if (read < 0)
                throw new EOFException();
            out.write(buf, 0, read);
            tot += read;
        }
        byte[] sha = md.digest();
        out.on(false);
        SimpleDataStructure hash = sigType.getHashInstance();
        hash.setData(sha);
        Signature signature = _context.dsa().sign(hash, privkey, sigType);
        if (signature == null)
            throw new IOException("sig fail");
        // System.out.println("hash\n" + HexDump.dump(sha));
        // System.out.println("sig\n" + HexDump.dump(signature.getData()));
        signature.writeBytes(out);
        ok = true;
    } catch (DataFormatException dfe) {
        IOException ioe = new IOException("foo");
        ioe.initCause(dfe);
        throw ioe;
    } finally {
        if (in != null)
            try {
                in.close();
            } catch (IOException ioe) {
            }
        if (out != null)
            try {
                out.close();
            } catch (IOException ioe) {
            }
        if (!ok)
            _file.delete();
    }
}

Example 13 with DataFormatException

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

the class I2CPMessageProducer method connect.

/**
 * Send all the messages that a client needs to send to a router to establish
 * a new session.
 */
public void connect(I2PSessionImpl session) throws I2PSessionException {
    updateBandwidth(session);
    CreateSessionMessage msg = new CreateSessionMessage();
    SessionConfig cfg = new SessionConfig(session.getMyDestination());
    cfg.setOptions(session.getOptions());
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("config created");
    try {
        cfg.signSessionConfig(session.getPrivateKey());
    } catch (DataFormatException dfe) {
        throw new I2PSessionException("Unable to sign the session config", dfe);
    }
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("config signed");
    msg.setSessionConfig(cfg);
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("config loaded into message");
    session.sendMessage_unchecked(msg);
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("config message sent");
}

Example 14 with DataFormatException

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

the class HostTxtEntry method hasValidRemoveSig.

/**
 * Verify with the "dest" property's public key using the "sig" property
 */
public boolean hasValidRemoveSig() {
    if (props == null)
        return false;
    boolean rv = false;
    // don't cache result
    if (true) {
        StringWriter buf = new StringWriter(1024);
        String sig = props.getProperty(PROP_SIG);
        String olddest = props.getProperty(PROP_DEST);
        if (sig == null || olddest == null)
            return false;
        try {
            writeProps(buf, true, true);
        } catch (IOException ioe) {
            // won't happen
            return false;
        }
        byte[] sdata = Base64.decode(sig);
        if (sdata == null)
            return false;
        Destination d;
        try {
            d = new Destination(olddest);
        } catch (DataFormatException dfe) {
            return false;
        }
        SigningPublicKey spk = d.getSigningPublicKey();
        SigType type = spk.getType();
        if (type == null)
            return false;
        Signature s;
        try {
            s = new Signature(type, sdata);
        } catch (IllegalArgumentException iae) {
            return false;
        }
        rv = DSAEngine.getInstance().verifySignature(s, DataHelper.getUTF8(buf.toString()), spk);
    }
    return rv;
}

Example 15 with DataFormatException

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

the class NamingService method lookupBase64.

/**
 * If the host name is a valid Base64 encoded destination, return the
 * decoded Destination. Useful as a "fallback" in custom naming
 * implementations.
 * This is misnamed as it isn't a "lookup" at all, but
 * a simple conversion from a Base64 string to a Destination.
 *
 * @param hostname 516+ character Base 64
 * @return Destination or null on error
 */
protected Destination lookupBase64(String hostname) {
    try {
        Destination result = new Destination();
        result.fromBase64(hostname);
        return result;
    } catch (DataFormatException dfe) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Bad B64 dest [" + hostname + "]", dfe);
        return null;
    }
}