Examples with RandomAccessFile java.io.RandomAccessFile used on opensource projects

Example 86 with RandomAccessFile

use of java.io.RandomAccessFile in project android_frameworks_base by ResurrectionRemix.

the class RecoverySystem method verifyPackage.

/**
     * Verify the cryptographic signature of a system update package
     * before installing it.  Note that the package is also verified
     * separately by the installer once the device is rebooted into
     * the recovery system.  This function will return only if the
     * package was successfully verified; otherwise it will throw an
     * exception.
     *
     * Verification of a package can take significant time, so this
     * function should not be called from a UI thread.  Interrupting
     * the thread while this function is in progress will result in a
     * SecurityException being thrown (and the thread's interrupt flag
     * will be cleared).
     *
     * @param packageFile  the package to be verified
     * @param listener     an object to receive periodic progress
     * updates as verification proceeds.  May be null.
     * @param deviceCertsZipFile  the zip file of certificates whose
     * public keys we will accept.  Verification succeeds if the
     * package is signed by the private key corresponding to any
     * public key in this file.  May be null to use the system default
     * file (currently "/system/etc/security/otacerts.zip").
     *
     * @throws IOException if there were any errors reading the
     * package or certs files.
     * @throws GeneralSecurityException if verification failed
     */
public static void verifyPackage(File packageFile, ProgressListener listener, File deviceCertsZipFile) throws IOException, GeneralSecurityException {
    final long fileLen = packageFile.length();
    final RandomAccessFile raf = new RandomAccessFile(packageFile, "r");
    try {
        final long startTimeMillis = System.currentTimeMillis();
        if (listener != null) {
            listener.onProgress(0);
        }
        raf.seek(fileLen - 6);
        byte[] footer = new byte[6];
        raf.readFully(footer);
        if (footer[2] != (byte) 0xff || footer[3] != (byte) 0xff) {
            throw new SignatureException("no signature in file (no footer)");
        }
        final int commentSize = (footer[4] & 0xff) | ((footer[5] & 0xff) << 8);
        final int signatureStart = (footer[0] & 0xff) | ((footer[1] & 0xff) << 8);
        byte[] eocd = new byte[commentSize + 22];
        raf.seek(fileLen - (commentSize + 22));
        raf.readFully(eocd);
        // end-of-central-directory record.
        if (eocd[0] != (byte) 0x50 || eocd[1] != (byte) 0x4b || eocd[2] != (byte) 0x05 || eocd[3] != (byte) 0x06) {
            throw new SignatureException("no signature in file (bad footer)");
        }
        for (int i = 4; i < eocd.length - 3; ++i) {
            if (eocd[i] == (byte) 0x50 && eocd[i + 1] == (byte) 0x4b && eocd[i + 2] == (byte) 0x05 && eocd[i + 3] == (byte) 0x06) {
                throw new SignatureException("EOCD marker found after start of EOCD");
            }
        }
        // Parse the signature
        PKCS7 block = new PKCS7(new ByteArrayInputStream(eocd, commentSize + 22 - signatureStart, signatureStart));
        // Take the first certificate from the signature (packages
        // should contain only one).
        X509Certificate[] certificates = block.getCertificates();
        if (certificates == null || certificates.length == 0) {
            throw new SignatureException("signature contains no certificates");
        }
        X509Certificate cert = certificates[0];
        PublicKey signatureKey = cert.getPublicKey();
        SignerInfo[] signerInfos = block.getSignerInfos();
        if (signerInfos == null || signerInfos.length == 0) {
            throw new SignatureException("signature contains no signedData");
        }
        SignerInfo signerInfo = signerInfos[0];
        // Check that the public key of the certificate contained
        // in the package equals one of our trusted public keys.
        boolean verified = false;
        HashSet<X509Certificate> trusted = getTrustedCerts(deviceCertsZipFile == null ? DEFAULT_KEYSTORE : deviceCertsZipFile);
        for (X509Certificate c : trusted) {
            if (c.getPublicKey().equals(signatureKey)) {
                verified = true;
                break;
            }
        }
        if (!verified) {
            throw new SignatureException("signature doesn't match any trusted key");
        }
        // The signature cert matches a trusted key.  Now verify that
        // the digest in the cert matches the actual file data.
        raf.seek(0);
        final ProgressListener listenerForInner = listener;
        SignerInfo verifyResult = block.verify(signerInfo, new InputStream() {

            // The signature covers all of the OTA package except the
            // archive comment and its 2-byte length.
            long toRead = fileLen - commentSize - 2;

            long soFar = 0;

            int lastPercent = 0;

            long lastPublishTime = startTimeMillis;

            @Override
            public int read() throws IOException {
                throw new UnsupportedOperationException();
            }

            @Override
            public int read(byte[] b, int off, int len) throws IOException {
                if (soFar >= toRead) {
                    return -1;
                }
                if (Thread.currentThread().isInterrupted()) {
                    return -1;
                }
                int size = len;
                if (soFar + size > toRead) {
                    size = (int) (toRead - soFar);
                }
                int read = raf.read(b, off, size);
                soFar += read;
                if (listenerForInner != null) {
                    long now = System.currentTimeMillis();
                    int p = (int) (soFar * 100 / toRead);
                    if (p > lastPercent && now - lastPublishTime > PUBLISH_PROGRESS_INTERVAL_MS) {
                        lastPercent = p;
                        lastPublishTime = now;
                        listenerForInner.onProgress(lastPercent);
                    }
                }
                return read;
            }
        });
        final boolean interrupted = Thread.interrupted();
        if (listener != null) {
            listener.onProgress(100);
        }
        if (interrupted) {
            throw new SignatureException("verification was interrupted");
        }
        if (verifyResult == null) {
            throw new SignatureException("signature digest verification failed");
        }
    } finally {
        raf.close();
    }
}

Example 87 with RandomAccessFile

use of java.io.RandomAccessFile in project ACS by ACS-Community.

the class StatHashMap method openOutputFile.

/**
	 * Open and create the output stream for writing statistics on file.
	 * <P>
	 * The file is opened for each writing and closed immediately.
	 * A new file is created, whenever the size of the actual file is
	 * greater then {@link #maxFileSize}.
	 * 
	 * @return The stream for writing into the file
	 * @throws IOException If can't open/create the file for writing
	 * @throws ValidationException In case of error validating the Statistics element (should never happen)
	 * @throws MarshalException Error writing Statistics header in the file
	 */
private BufferedWriter openOutputFile() throws IOException, MarshalException, ValidationException {
    String actualFileName = fileNamePrefix + fileNumber + ".xml";
    String folderName = folder.getAbsolutePath();
    if (!folderName.endsWith("" + File.separator)) {
        folderName = folderName + File.separator;
    }
    // Check the size of the file if it exists
    File f = new File(folderName + actualFileName);
    if (f.exists() && f.length() > maxFileSize) {
        fileNumber++;
        return openOutputFile();
    }
    if (f.length() == 0) {
        // New file: write the header
        Statistics statistics = new Statistics();
        BufferedWriter outF = new BufferedWriter(new FileWriter(f, true));
        Marshaller marshaller = getMarshaller(outF);
        marshaller.setSupressXMLDeclaration(false);
        marshaller.marshal(statistics);
        outF.flush();
        outF.close();
        RandomAccessFile raf = new RandomAccessFile(f, "rw");
        raf.setLength(raf.length() - 3);
        raf.seek(raf.length());
        raf.writeBytes(">\n");
        raf.close();
    } else {
        // Remove the closing tag (closeXMLTag) before adding a new record
        RandomAccessFile raf = new RandomAccessFile(f, "rw");
        raf.setLength(raf.length() - closeXMLTag.length() - 1);
        raf.seek(raf.length());
        raf.writeBytes("\n");
        raf.close();
    }
    return new BufferedWriter(new FileWriter(f, true));
}

Example 88 with RandomAccessFile

use of java.io.RandomAccessFile in project ACS by ACS-Community.

the class DefaultXmlQueueFileHandlerImpl method fileProcessed.

/**
	 * Append the XML footer to the passed file before calling 
	 * {@link DefaultQueueFileHandlerImpl#fileProcessed(File, String, String)}
	 */
@Override
public void fileProcessed(File filePointer, String minTime, String maxTime) {
    try {
        RandomAccessFile rf = new RandomAccessFile(filePointer.getAbsolutePath(), "rw");
        rf.seek(rf.length());
        rf.writeBytes("\n</" + xmlTag + ">");
        rf.close();
    } catch (Throwable t) {
        // A error happening writing the footer will be ignored (but still we want to print it out)
        System.err.println("Error writing the footer: " + t.getMessage());
        t.printStackTrace(System.err);
    }
    super.fileProcessed(filePointer, minTime, maxTime);
}

Example 89 with RandomAccessFile

use of java.io.RandomAccessFile in project ACS by ACS-Community.

the class EntriesQueue method writePageOnFile.

/**
	 * Write a page of <code>QueueEntry</code> in the file
	 * 
	 * @throws IOException In case of error creating a new temporary file
	 */
private void writePageOnFile() throws IOException {
    if (file == null) {
        file = getNewFile();
        try {
            raFile = new RandomAccessFile(file, "rw");
        } catch (FileNotFoundException e) {
            // Ops an error creating the file
            // print a message and exit: in this way it will try again
            // at next iteration
            file = null;
            raFile = null;
            IOException ioe = new IOException("Error creating the random file", e);
            throw ioe;
        }
    }
    if (cachedEntries.size() < PAGE_LEN) {
        throw new IllegalStateException("Not enough entries in vector");
    }
    for (int t = 0; t < PAGE_LEN; t++) {
        QueueEntry e = cachedEntries.get(t);
        byte[] hexBytes = e.toHexadecimal().getBytes();
        for (int y = 0; y < hexBytes.length; y++) {
            fileBuffer[t * QueueEntry.ENTRY_LENGTH + y] = hexBytes[y];
        }
    }
    raFile.seek(raFile.length());
    raFile.write(fileBuffer);
    // the data still in the vector
    for (int t = 0; t < PAGE_LEN; t++) {
        cachedEntries.remove(0);
    }
    pagesOnFile++;
}

Example 90 with RandomAccessFile

use of java.io.RandomAccessFile in project android-gps-test-tool by Esri.

the class GPSTesterActivityController method getCPU.

/**
	 * Returns CPU usage info. Careful using this it's CPU intensive by itself! 
	 * @return Percentage
	 */
private float getCPU() {
    try {
        RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r");
        String load = reader.readLine();
        String[] toks = load.split(" ");
        long idle1 = Long.parseLong(toks[5]);
        long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4]) + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);
        try {
            Thread.sleep(360);
        } catch (Exception e) {
        }
        reader.seek(0);
        load = reader.readLine();
        reader.close();
        toks = load.split(" ");
        long idle2 = Long.parseLong(toks[5]);
        long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4]) + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);
        return (float) (cpu2 - cpu1) / ((cpu2 + idle2) - (cpu1 + idle1));
    } catch (IOException ex) {
        ex.printStackTrace();
    }
    return 0;
}