Example usage for java.math BigInteger toString

Introduction

In this page you can find the example usage for java.math BigInteger toString.

Prototype

public String toString(int radix) 

Source Link

Document

Returns the String representation of this BigInteger in the given radix.

Usage

From source file:com.cloud.server.auth.MD5UserAuthenticator.java

@Override
public String encode(final String password) {
    try {/*  w  w  w  .ja  v  a2s  .  c  o m*/
        final MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.reset();
        BigInteger pwInt = new BigInteger(1, md5.digest(password.getBytes()));
        String pwStr = pwInt.toString(16);
        int padding = 32 - pwStr.length();
        StringBuilder sb = new StringBuilder(32);
        for (int i = 0; i < padding; i++) {
            sb.append('0'); // make sure the MD5 password is 32 digits long
        }
        sb.append(pwStr);
        return sb.toString();
    } catch (NoSuchAlgorithmException e) {
        throw new CloudRuntimeException("Unable to hash password", e);
    }

}

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From source file:grails.plugin.springsecurity.authentication.encoding.PBKDF2PasswordEncoder.java

/**
 * Converts a byte array into a hexadecimal string.
 *
 * @param   array       the byte array to convert
 * @return              a length*2 character string encoding the byte array
 *//*from ww  w. j a va2 s.  co  m*/
protected String toHex(byte[] array) {
    BigInteger bi = new BigInteger(1, array);
    String hex = bi.toString(16);
    int paddingLength = (array.length * 2) - hex.length();
    if (paddingLength > 0) {
        return String.format("%0" + paddingLength + "d", 0) + hex;
    }

    return hex;
}

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From source file:org.opendatakit.common.android.utilities.ODKFileUtils.java

public static String getNakedMd5Hash(String appName, File file) {
    try {/*  w w w. jav  a 2 s  . c o  m*/
        // CTS (6/15/2010) : stream file through digest instead of handing
        // it the byte[]
        MessageDigest md = MessageDigest.getInstance("MD5");
        int chunkSize = 8192;

        byte[] chunk = new byte[chunkSize];

        // Get the size of the file
        long lLength = file.length();

        if (lLength > Integer.MAX_VALUE) {
            WebLogger.getLogger(appName).e(t, "File " + file.getName() + "is too large");
            return null;
        }

        int length = (int) lLength;

        InputStream is = null;
        is = new FileInputStream(file);

        int l = 0;
        for (l = 0; l + chunkSize < length; l += chunkSize) {
            is.read(chunk, 0, chunkSize);
            md.update(chunk, 0, chunkSize);
        }

        int remaining = length - l;
        if (remaining > 0) {
            is.read(chunk, 0, remaining);
            md.update(chunk, 0, remaining);
        }
        byte[] messageDigest = md.digest();

        BigInteger number = new BigInteger(1, messageDigest);
        String md5 = number.toString(16);
        while (md5.length() < 32)
            md5 = "0" + md5;
        is.close();
        return md5;

    } catch (NoSuchAlgorithmException e) {
        WebLogger.getLogger(appName).e("MD5", e.getMessage());
        return null;

    } catch (FileNotFoundException e) {
        WebLogger.getLogger(appName).e("No Cache File", e.getMessage());
        return null;
    } catch (IOException e) {
        WebLogger.getLogger(appName).e("Problem reading from file", e.getMessage());
        return null;
    }

}

---

From source file:org.opendatakit.common.android.utilities.ODKFileUtils.java

public static String getNakedMd5Hash(String appName, String contents) {
    try {/*w w w  . j  av  a 2 s.c o  m*/
        // CTS (6/15/2010) : stream file through digest instead of handing
        // it the byte[]
        MessageDigest md = MessageDigest.getInstance("MD5");
        int chunkSize = 256;

        byte[] chunk = new byte[chunkSize];

        // Get the size of the file
        long lLength = contents.length();

        if (lLength > Integer.MAX_VALUE) {
            WebLogger.getLogger(appName).e(t, "Contents is too large");
            return null;
        }

        int length = (int) lLength;

        InputStream is = null;
        is = new ByteArrayInputStream(contents.getBytes(CharEncoding.UTF_8));

        int l = 0;
        for (l = 0; l + chunkSize < length; l += chunkSize) {
            is.read(chunk, 0, chunkSize);
            md.update(chunk, 0, chunkSize);
        }

        int remaining = length - l;
        if (remaining > 0) {
            is.read(chunk, 0, remaining);
            md.update(chunk, 0, remaining);
        }
        byte[] messageDigest = md.digest();

        BigInteger number = new BigInteger(1, messageDigest);
        String md5 = number.toString(16);
        while (md5.length() < 32)
            md5 = "0" + md5;
        is.close();
        return md5;

    } catch (NoSuchAlgorithmException e) {
        WebLogger.getLogger(appName).e("MD5", e.getMessage());
        return null;

    } catch (FileNotFoundException e) {
        WebLogger.getLogger(appName).e("No Cache File", e.getMessage());
        return null;
    } catch (IOException e) {
        WebLogger.getLogger(appName).e("Problem reading from file", e.getMessage());
        return null;
    }

}

---

From source file:mitm.common.security.certificate.GenerateKeyPairs.java

private String bigIntToString(BigInteger bigInt) throws IOException {
    return FixedWidthReader.fixedWidth(bigInt.toString(16), WIDTH);
}

---

From source file:org.alfresco.repo.virtual.ref.NodeRefRadixHasher.java

@Override
public NodeRef lookup(Pair<String, String> hash) {
    String storeHash = hash.getFirst();
    String storeProtocolHash = storeHash.substring(0, 1);
    String storeIdHash = storeHash.substring(1, 2);

    String storeProtocol = storeProtocolStore.lookup(storeProtocolHash);
    String storeId = storeIdStore.lookup(storeIdHash);
    if (storeProtocol == null || storeId == null) {
        throw new RuntimeException("Lookup found no protocol or id for " + storeHash);
    }/*from ww  w.j  a  v  a  2s .  co  m*/
    BigInteger nodeId = new BigInteger(hash.getSecond(), radix);
    String nodeIdHexa = nodeId.toString(16);
    nodeIdHexa = StringUtils.leftPad(nodeIdHexa, 32, "0");
    int leadZeros = 32 - nodeIdHexa.length();
    if (leadZeros > 0) {
    }
    String groups[] = new String[5];
    groups[0] = nodeIdHexa.substring(0, 8);
    groups[1] = nodeIdHexa.substring(8, 12);
    groups[2] = nodeIdHexa.substring(12, 16);
    groups[3] = nodeIdHexa.substring(16, 20);
    groups[4] = nodeIdHexa.substring(20, 32);
    StringBuilder idBuilder = new StringBuilder(groups[0]);
    for (int i = 1; i < groups.length; i++) {
        idBuilder.append("-");
        idBuilder.append(groups[i]);
    }
    return new NodeRef(storeProtocol, storeId, idBuilder.toString());
}

---

From source file:nl.minvenj.pef.pseudo.IPPseudonymizer.java

private byte[] pseudonymize(final byte[] ipAddress, final int bitCount, final int mask,
        final int changeBitCount) {
    final BigInteger ipBigInt = new BigInteger(1, ipAddress);
    final String ipString = ipBigInt.toString(RADIX);

    final BigInteger bigIntMask = BigInteger.ONE.shiftLeft(bitCount - mask).subtract(BigInteger.ONE);

    final String bitStringToEncrypt = ipBigInt.and(bigIntMask).toString(RADIX);
    final String bitStringToEncryptPadded = Util.padZeroLeft(bitStringToEncrypt,
            changeBitCount - bitStringToEncrypt.length());

    final String encrypted = _encrypter.encrypt(TWEAK, bitStringToEncryptPadded);

    final int keptBitCount = ipString.length() - changeBitCount;
    // keptBitCount is how many (string) bits to keep there are left in the original string
    // this is not necessarily equal to the mask, due to the conversion from BigInteger
    // since it will get converted to a number, take those left and concat, or if none, just use encrypted
    final String rebuiltBitString = keptBitCount > 0 ? ipString.substring(0, keptBitCount).concat(encrypted)
            : encrypted;//  w  w w.  j  a v a2s  .  co m

    return toIPAddressOfSize(new BigInteger(rebuiltBitString, RADIX), ipAddress.length);
}

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From source file:ro.kuberam.libs.java.crypto.CryptoModuleTests.java

@Test
public void digestOutputStreamTest() throws Exception {
    final MessageDigest md = MessageDigest.getInstance("SHA-512");

    try (final OutputStream fos = Files.newOutputStream(Paths
            .get("/home/claudius/workspace-claudius/expath-crypto/src/org/expath/crypto/tests/string.txt"));
            final DigestOutputStream dos = new DigestOutputStream(fos, md);
            final ObjectOutputStream oos = new ObjectOutputStream(dos)) {

        final String data = "This have I thought good to deliver thee, "
                + "that thou mightst not lose the dues of rejoicing "
                + "by being ignorant of what greatness is promised thee.";
        oos.writeObject(data);/*w  w w . ja v a  2s . c o m*/
        dos.on(false);
        final byte[] digest = md.digest();
        oos.writeObject(digest);
        final int digestLength = digest.length;
        System.out.println("length: " + digestLength);
        final BigInteger bi = new BigInteger(1, digest);
        String result = bi.toString(digestLength);
        if (result.length() % 2 != 0) {
            result = "0" + result;
        }

        System.out.println("result: " + result);
    }
}

---

From source file:org.rifidi.edge.adapter.awid.awid2010.communication.messages.Gen2ReadBlockDataResponse.java

@Override
public TagReadEvent getTagReadEvent() {
    EPCGeneration2Event gen2Event = new EPCGeneration2Event();
    byte[] shiftedmessage = new byte[super.rawmessage.length];
    BigInteger bi = new BigInteger(super.rawmessage);
    BigInteger bi2 = bi.shiftLeft(1);

    shiftedmessage = bi2.toByteArray();/*from  w  w  w. ja  v a2  s  .c  o m*/
    if (memorybank == 0) {
        logger.debug("Reserved Memory Bank" + new String(Hex.encodeHex(shiftedmessage)));
        //TODO: put bytes in reserved mem bank
    } else if (memorybank == 1) {
        logger.debug("EPC Memory Bank" + new String(Hex.encodeHex(shiftedmessage)));
        //TODO: what if we don't have 96 bits?
        BigInteger epc = new BigInteger(Arrays.copyOfRange(shiftedmessage, 7, 19));
        gen2Event.setEPCMemory(epc, epc.toString(16), 12 * 8);
    } else if (memorybank == 2) {
        logger.debug("TID Memory Bank " + new String(Hex.encodeHex(shiftedmessage)));

        // TODO: this is not quite correct since it assumes that we have 96
        // bits
        gen2Event.setTIDMemory(new BigInteger(Arrays.copyOfRange(shiftedmessage, 3, 17)), 12 * 8);
    } else if (memorybank == 3) {
        logger.debug("User Memory Bank" + new String(Hex.encodeHex(shiftedmessage)));
        // TODO: insert into user memory
    }

    TagReadEvent tre;
    if (super.rawmessage.length == 22) {
        logger.debug("AntennaID " + super.rawmessage[19]);
        tre = new TagReadEvent(readerID, gen2Event, super.rawmessage[19], timestamp);
    } else {
        logger.warn("No Antenna byte, assuming default value of " + 1);
        tre = new TagReadEvent(readerID, gen2Event, 1, timestamp);
    }
    return tre;
}

---

From source file:org.dataconservancy.dcs.integration.main.IngestTest.java

public String hashPassword(String password) {
    String hashword = null;//from   w w  w.ja  v  a 2  s .  c o  m
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(password.getBytes());
        BigInteger hash = new BigInteger(1, md5.digest());
        hashword = hash.toString(16);
    } catch (NoSuchAlgorithmException localNoSuchAlgorithmException) {
    }
    return pad(hashword, 32, '0');
}

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