Java Code Examples for java.security.DigestInputStream#read()

/**
 * @source http://stackoverflow.com/a/304350
 */
private static byte[] hash(String alg, InputStream in) throws Exception {
    MessageDigest md = MessageDigest.getInstance(alg);
    DigestInputStream dis = new DigestInputStream(new BufferedInputStream(in), md);
    try {
        byte[] buffer = new byte[1024];
        while (true) {
            int readCount = dis.read(buffer);
            if (readCount < 0) {
                break;
            }
        }
        return md.digest();
    } finally {
        in.close();
    }
}
 

byte[] hash(InputStream input) throws SdkClientException {
    try {
        MessageDigest md = getMessageDigestInstance();
        @SuppressWarnings("resource")
        DigestInputStream digestInputStream = new SdkDigestInputStream(
                input, md);
        byte[] buffer = new byte[1024];
        while (digestInputStream.read(buffer) > -1) {
            ;
        }
        return digestInputStream.getMessageDigest().digest();
    } catch (Exception e) {
        throw SdkClientException.builder()
                                .message("Unable to compute hash while signing request: " + e.getMessage())
                                .cause(e)
                                .build();
    }
}
 

@Rpc(description = "Compute MD5 hash on a content URI. Return the MD5 has has a hex string.")
public String fileMd5Hash(String uri) throws IOException, NoSuchAlgorithmException {
    Uri uri_ = Uri.parse(uri);
    ParcelFileDescriptor pfd = mContext.getContentResolver().openFileDescriptor(uri_, "r");
    MessageDigest md = MessageDigest.getInstance("MD5");
    int length = (int) pfd.getStatSize();
    byte[] buf = new byte[length];
    ParcelFileDescriptor.AutoCloseInputStream stream =
            new ParcelFileDescriptor.AutoCloseInputStream(pfd);
    DigestInputStream dis = new DigestInputStream(stream, md);
    try {
        dis.read(buf, 0, length);
        return Utils.bytesToHexString(md.digest());
    } finally {
        dis.close();
        stream.close();
    }
}
 

/**
 * 
 * @param inputStream
 * @return
 * @throws NoSuchAlgorithmException
 * @throws IOException
 */
public static Md5Result generateChecksum(InputStream inputStream) throws NoSuchAlgorithmException, IOException {
	Md5Result md5 = new Md5Result();
	MessageDigest md = MessageDigest.getInstance("MD5");
	DigestInputStream dis = new DigestInputStream(inputStream, md);
	
	byte[] dataBytes = new byte[4096];
      
       int nread = 0; 
       while ((nread = dis.read(dataBytes)) != -1) {
       	md5.contentLength += nread;
       };
       
       dis.close();
       
       long startNs = System.nanoTime();
       md5.md5 = generateChecksumFromDigest(md.digest());
       md5.generatingTimeNs = System.nanoTime() - startNs;
       
       return md5;
}
 

public static byte[] calculateSHA256Digest(byte[] input)
    throws IOException 
{
    try 
    {
        MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
        DigestInputStream dis = new DigestInputStream(new ByteArrayInputStream(input), sha256);
        byte [] temp = new byte[0x1 << 13];
        byte[] digest;
        while(dis.read(temp) >= 0);
        {
            digest = sha256.digest();
        }
        
        return digest;
    } catch (NoSuchAlgorithmException impossible) 
    {
        throw new IOException(impossible);
    }
}
 

static String md5sum(InputStream input) throws IOException {
  BufferedInputStream in = new BufferedInputStream(input);

  try {
    MessageDigest digest = MessageDigest.getInstance("MD5");
    DigestInputStream digestInputStream = new DigestInputStream(in, digest);
    boolean bytesRead = false;
    byte[] buffer = new byte[8192];

    while(digestInputStream.read(buffer) != -1) {
      // CHECKSTYLE:OFF EmptyStatement
      ;
      // CHECKSTYLE:ON
    }

    ByteArrayOutputStream md5out = new ByteArrayOutputStream();
    md5out.write(digest.digest());
    String md5String = md5out.toString();
    return md5String;
  } catch (NoSuchAlgorithmException noSuchAlgorithmException) {
    throw new IllegalStateException("MD5 algorithm is not available: " + noSuchAlgorithmException);
  } finally {
    in.close();
  }
}
 

/**
 * Test #4 for <code>read(byte[],int,int)</code> method<br>
 *
 * Assertion: returns the number of bytes read<br>
 *
 * Assertion: updates associated digest<br>
 */
public final void testReadbyteArrayintint04()
    throws IOException {
    for (int ii=0; ii<algorithmName.length; ii++) {
        try {
            MessageDigest md = MessageDigest.getInstance(algorithmName[ii]);
            InputStream is = new ByteArrayInputStream(myMessage);
            DigestInputStream dis = new DigestInputStream(is, md);
            byte[] bArray = new byte[MY_MESSAGE_LEN];
            // read all but EOS
            dis.read(bArray, 0, bArray.length);
            // check that subsequent read(byte[],int,int) calls return -1 (EOS)
            assertEquals("retval1", -1, dis.read(bArray, 0, 1));
            assertEquals("retval2", -1, dis.read(bArray, 0, bArray.length));
            assertEquals("retval3", -1, dis.read(bArray, 0, 1));
            // check that 3 previous read() calls did not update digest
            assertTrue("update",
                    Arrays.equals(dis.getMessageDigest().digest(),
                            MDGoldenData.getDigest(algorithmName[ii])));
            return;
        } catch (NoSuchAlgorithmException e) {
            // allowed failure
        }
    }
    fail(getName() + ": no MessageDigest algorithms available - test not performed");
}
 

public static String getMD5( File f ) throws Exception
{
  MessageDigest md = MessageDigest.getInstance("MD5");
  BufferedInputStream bis = new BufferedInputStream( new FileInputStream( f ) );
  DigestInputStream dis = new DigestInputStream(bis, md);
  byte[] buf = new byte[8192];
  for(;;)
  {
    int len = dis.read( buf );
    if ( len <= 0 )
    {
      break;
    }
  }
  dis.close();
  byte[] bytes = md.digest();

  StringBuilder sb = new StringBuilder();
  for (int j = 0; j < bytes.length; j++)
  {
    int v = bytes[j] & 0xff;
    sb.append( hexChar( v >>> 4 ) ).append( hexChar( v & 0xf ) );
  }
  return sb.toString();
}
 

/**
 * @source http://stackoverflow.com/a/304350
 */
private static byte[] hash(String alg, InputStream in) throws Exception {
    MessageDigest md = MessageDigest.getInstance(alg);
    DigestInputStream dis = new DigestInputStream(new BufferedInputStream(in), md);
    try {
        byte[] buffer = new byte[1024];
        while (true) {
            int readCount = dis.read(buffer);
            if (readCount < 0) {
                break;
            }
        }
        return md.digest();
    } finally {
        in.close();
    }
}
 

private static boolean checkSHA256(final File provingKey, final Component parent) throws IOException {
    final MessageDigest sha256;
    try {
        sha256 = MessageDigest.getInstance("SHA-256");
    } catch (final NoSuchAlgorithmException impossible) {
        throw new RuntimeException(impossible);
    }
    try (final InputStream is = new BufferedInputStream(new FileInputStream(provingKey))) {
        final ProgressMonitorInputStream pmis = new ProgressMonitorInputStream(parent, "Verifying proving key", is);
        pmis.getProgressMonitor().setMaximum(PROVING_KEY_SIZE);
        pmis.getProgressMonitor().setMillisToPopup(10);
        final DigestInputStream dis = new DigestInputStream(pmis, sha256);
        final byte[] temp = new byte[0x1 << 13];
        while (dis.read(temp) >= 0) {
            /* do the thing */
        }
        final byte[] digest = sha256.digest();
        return SHA256.equalsIgnoreCase(DatatypeConverter.printHexBinary(digest));
    }
}
 

public byte[] getSha1Checksum(String filepath) {
    if (filepath == null) {
        return new byte[0];
    }
    try {
        MessageDigest digest = MessageDigest.getInstance("SHA1");
        File f = new File(filepath);
        FileInputStream is = new FileInputStream(f);
        DigestInputStream dis = new DigestInputStream(is, digest);
        byte[] buffer = new byte[1024];
        while (dis.read(buffer) > 0) {
            // nothing to do :)
        }
        is.close();
        return dis.getMessageDigest().digest();
    } catch (NoSuchAlgorithmException ignored) {
    } catch (IOException e) {
        log.info("Error reading file file: {}", filepath);
    }
    return new byte[0];
}
 

/**
 * 方法描述：计算hash值
 * @param input
 * @return
 * @throws SdkClientException 
 * @author lixuenan3
 * @date 2018年3月22日 下午3:26:35
 */
protected byte[] hash(InputStream input) throws SdkClientException {
    try {
        MessageDigest md = getMessageDigestInstance();
        @SuppressWarnings("resource")
        DigestInputStream digestInputStream = new SdkDigestInputStream(
                input, md);
        byte[] buffer = new byte[1024];
        while (digestInputStream.read(buffer) > -1) {
            ;
        }
        return digestInputStream.getMessageDigest().digest();
    } catch (Exception e) {
        throw new SdkClientException(
                "Unable to compute hash while signing request: "
                        + e.getMessage(), e);
    }
}
 

/**
 * Generate a SHA.1 Hash for a given file.
 * @param file the file to hash
 * @return the hash value as a String
 * @throws IOException if the file cannot be read
 */
public static String sha1Hash(File file) throws IOException {
    try {
        DigestInputStream inputStream = new DigestInputStream(new FileInputStream(file),
            MessageDigest.getInstance("SHA-1"));
        try {
            byte[] buffer = new byte[4098];
            while (inputStream.read(buffer) != -1) { //NOPMD
                // Read the entire stream
            }
            return bytesToHex(inputStream.getMessageDigest().digest());
        } finally {
            inputStream.close();
        }
    } catch (NoSuchAlgorithmException ex) {
        throw new IllegalStateException(ex);
    }
}
 

/**
 * Test #3 for <code>read()</code> method<br>
 * Test #1 for <code>on(boolean)</code> method<br>
 *
 * Assertion: <code>read()</code> must not update digest if it is off<br>
 * Assertion: <code>on(boolean)</code> turns digest functionality on
 * (if <code>true</code> passed as a parameter) or off (if <code>false</code>
 *  passed)
 */
public final void testRead03()
    throws IOException {
    for (int ii=0; ii<algorithmName.length; ii++) {
        try {
            MessageDigest md = MessageDigest.getInstance(algorithmName[ii]);
            InputStream is = new ByteArrayInputStream(myMessage);
            DigestInputStream dis = new DigestInputStream(is, md);

            // turn digest off
            dis.on(false);

            for (int i=0; i<MY_MESSAGE_LEN; i++) {
                dis.read();
            }

            // check that digest value has not been updated by read()
            assertTrue(Arrays.equals(dis.getMessageDigest().digest(),
                    MDGoldenData.getDigest(algorithmName[ii]+"_NU")));
            return;
        } catch (NoSuchAlgorithmException e) {
            // allowed failure
        }
    }
    fail(getName() + ": no MessageDigest algorithms available - test not performed");
}
 

public static String md5(String path_of_file_) {
	try {
		MessageDigest md = MessageDigest.getInstance("MD5");
		InputStream is = Files.newInputStream(Paths.get(path_of_file_));
		DigestInputStream dis = new DigestInputStream(is, md);
		byte[] buffer = new byte[8192];
		while (dis.read(buffer) > 0)
			; // process the entire file
		String data = DatatypeConverter.printHexBinary(md.digest()).toLowerCase();
		dis.close();
		is.close();
		return data;
	}
	catch (NoSuchAlgorithmException | IOException e) {
		return "";
	}
}
 

public static String getDigestString(final File file) throws Exception {
    final MessageDigest messageDigest = MessageDigest.getInstance("MD5");
    final FileInputStream fileInputStream = new FileInputStream(file);
    final DigestInputStream digestInputStream = new DigestInputStream(fileInputStream, messageDigest);

    final byte[] buffer = new byte[8192];
    for (int bytesRead = 1; bytesRead > 0;) {
        bytesRead = digestInputStream.read(buffer);
    }

    final byte[] digestValue = messageDigest.digest();
    final StringBuilder sb = new StringBuilder(digestValue.length);
    for (final byte b : digestValue) {
        sb.append(b);
    }

    return sb.toString();
}
 

/** Display the location and checksum of a class. */
void showClass(String className) {
    PrintWriter pw = log.getWriter(WriterKind.NOTICE);
    pw.println("javac: show class: " + className);
    URL url = getClass().getResource('/' + className.replace('.', '/') + ".class");
    if (url == null)
        pw.println("  class not found");
    else {
        pw.println("  " + url);
        try {
            final String algorithm = "MD5";
            byte[] digest;
            MessageDigest md = MessageDigest.getInstance(algorithm);
            DigestInputStream in = new DigestInputStream(url.openStream(), md);
            try {
                byte[] buf = new byte[8192];
                int n;
                do { n = in.read(buf); } while (n > 0);
                digest = md.digest();
            } finally {
                in.close();
            }
            StringBuilder sb = new StringBuilder();
            for (byte b: digest)
                sb.append(String.format("%02x", b));
            pw.println("  " + algorithm + " checksum: " + sb);
        } catch (Exception e) {
            pw.println("  cannot compute digest: " + e);
        }
    }
}
 

/** Display the location and checksum of a class. */
void showClass(String className) {
    PrintWriter pw = log.getWriter(WriterKind.NOTICE);
    pw.println("javac: show class: " + className);
    URL url = getClass().getResource('/' + className.replace('.', '/') + ".class");
    if (url == null)
        pw.println("  class not found");
    else {
        pw.println("  " + url);
        try {
            final String algorithm = "MD5";
            byte[] digest;
            MessageDigest md = MessageDigest.getInstance(algorithm);
            DigestInputStream in = new DigestInputStream(url.openStream(), md);
            try {
                byte[] buf = new byte[8192];
                int n;
                do { n = in.read(buf); } while (n > 0);
                digest = md.digest();
            } finally {
                in.close();
            }
            StringBuilder sb = new StringBuilder();
            for (byte b: digest)
                sb.append(String.format("%02x", b));
            pw.println("  " + algorithm + " checksum: " + sb);
        } catch (Exception e) {
            pw.println("  cannot compute digest: " + e);
        }
    }
}
 

protected byte[] hash(InputStream inputstream)
{
    byte abyte1[];
    try
    {
        DigestInputStream digestinputstream = new DigestInputStream(inputstream, MessageDigest.getInstance("SHA-256"));
        for (byte abyte0[] = new byte[1024]; digestinputstream.read(abyte0) > -1;) { }
        abyte1 = digestinputstream.getMessageDigest().digest();
    }
    catch (Exception exception)
    {
        throw new GalaxyClientException(ReturnCode.SIGNATURE_FAILED, (new StringBuilder()).append("Unable to compute hash while signing request: ").append(exception.getMessage()).toString(), exception);
    }
    return abyte1;
}
 

/** Display the location and checksum of a class. */
void showClass(String className) {
    PrintWriter pw = log.getWriter(WriterKind.NOTICE);
    pw.println("javac: show class: " + className);
    URL url = getClass().getResource('/' + className.replace('.', '/') + ".class");
    if (url == null)
        pw.println("  class not found");
    else {
        pw.println("  " + url);
        try {
            final String algorithm = "MD5";
            byte[] digest;
            MessageDigest md = MessageDigest.getInstance(algorithm);
            DigestInputStream in = new DigestInputStream(url.openStream(), md);
            try {
                byte[] buf = new byte[8192];
                int n;
                do { n = in.read(buf); } while (n > 0);
                digest = md.digest();
            } finally {
                in.close();
            }
            StringBuilder sb = new StringBuilder();
            for (byte b: digest)
                sb.append(String.format("%02x", b));
            pw.println("  " + algorithm + " checksum: " + sb);
        } catch (Exception e) {
            pw.println("  cannot compute digest: " + e);
        }
    }
}