List of usage examples for java.math BigInteger toByteArray
public byte[] toByteArray()
From source file:org.rifidi.edge.core.services.notification.data.EPCGeneration1Event.java
/** * Set the epc memory bank./*from w ww . j a v a 2s .c om*/ * * @param memBank * @param length * The size of the memory bank in bits */ public void setEPCMemory(BigInteger memBank, Integer length) { hex = new String(Hex.encodeHex(memBank.toByteArray())); memoryBanks.get(0).setLength(length); memoryBanks.get(0).setMemory(memBank); }
From source file:com.trsst.Common.java
public static byte[] fromBase58(String s) { try {//w ww .j a va2s . co m boolean leading = true; int lz = 0; BigInteger b = BigInteger.ZERO; for (char c : s.toCharArray()) { if (leading && c == '1') { ++lz; } else { leading = false; b = b.multiply(BigInteger.valueOf(58)); b = b.add(BigInteger.valueOf(r58[c])); } } byte[] encoded = b.toByteArray(); if (encoded[0] == 0) { if (lz > 0) { --lz; } else { byte[] e = new byte[encoded.length - 1]; System.arraycopy(encoded, 1, e, 0, e.length); encoded = e; } } byte[] result = new byte[encoded.length + lz]; System.arraycopy(encoded, 0, result, lz, encoded.length); return result; } catch (ArrayIndexOutOfBoundsException e) { throw new IllegalArgumentException("Invalid character in address"); } catch (Exception e) { throw new IllegalArgumentException(e); } }
From source file:org.openbaton.nfvo.core.api.KeyManagement.java
private String encodePublicKey(RSAPublicKey key, String keyname) throws IOException { ByteArrayOutputStream out = new ByteArrayOutputStream(); /* encode the "ssh-rsa" string */ byte[] sshrsa = new byte[] { 0, 0, 0, 7, 's', 's', 'h', '-', 'r', 's', 'a' }; out.write(sshrsa);//from w w w . j a v a 2 s . com /* Encode the public exponent */ BigInteger e = key.getPublicExponent(); byte[] data = e.toByteArray(); encodeUInt32(data.length, out); out.write(data); /* Encode the modulus */ BigInteger m = key.getModulus(); data = m.toByteArray(); encodeUInt32(data.length, out); out.write(data); return "ssh-rsa " + Base64.encodeBase64String(out.toByteArray()) + " " + keyname; }
From source file:cherry.windows.charset.ListCreator.java
public void createList() throws IOException { Charset ms932 = Charset.forName("MS932"); Charset cp943 = Charset.forName("CP943"); Charset win31j = Charset.forName("Windows-31J"); System.out.println("WIN\tUNI\tMS932(1)\tMS932(2)\tCP943(1)\tCP943(2)\tWin31J(1)\tWin31J(2)\tCOMMENT"); List<Entry> list = tableParser.parse("CP932.TXT"); for (Entry entry : list) { System.out.print(entry.getWinCode()); System.out.print("\t"); System.out.print(entry.getUniCode()); System.out.print("\t"); BigInteger winCode = new BigInteger(entry.getWinCode(), 16); BigInteger bi932x1 = new BigInteger((new String(winCode.toByteArray(), ms932)).getBytes(ms932)); BigInteger bi932x2 = new BigInteger((new String(bi932x1.toByteArray(), ms932)).getBytes(ms932)); System.out.print(winCode.equals(bi932x1)); System.out.print("\t"); System.out.print(bi932x1.equals(bi932x2)); System.out.print("\t"); BigInteger bi943x1 = new BigInteger((new String(winCode.toByteArray(), cp943)).getBytes(cp943)); BigInteger bi943x2 = new BigInteger((new String(bi943x1.toByteArray(), cp943)).getBytes(cp943)); System.out.print(winCode.equals(bi943x1)); System.out.print("\t"); System.out.print(bi943x1.equals(bi943x2)); System.out.print("\t"); BigInteger bi31jx1 = new BigInteger((new String(winCode.toByteArray(), win31j)).getBytes(win31j)); BigInteger bi31jx2 = new BigInteger((new String(bi31jx1.toByteArray(), win31j)).getBytes(win31j)); System.out.print(winCode.equals(bi31jx1)); System.out.print("\t"); System.out.print(bi31jx1.equals(bi31jx2)); System.out.print("\t"); System.out.print(entry.getComment()); System.out.println();//from w ww . jav a 2 s .c o m } }
From source file:org.wso2.carbon.identity.oauth.endpoint.jwks.JwksEndpoint.java
public String base64EncodeUint(final BigInteger v) { return base64urlEncode(v.toByteArray()); }
From source file:com.openvcx.conference.KeyGenerator.java
/** * <p>Obtains a sequence of random bytes.</p> * <p><i>java.security.SecureRandom</i> is used as the random number generator</p> * @param length The length in bytes of the random byte sequence to generate * @param algo The algorithm used to hash the random bytes * @return The random byte sequence/* w ww . j a v a 2 s .c o m*/ */ public byte[] getRandomBytes(int length, String algo) throws NoSuchAlgorithmException { int index = 0; byte[] randBytes = new byte[length]; synchronized (m_sync) { while (index < length) { BigInteger bi = new BigInteger(64, m_rand); byte[] b = createHash(bi.toByteArray(), algo); //int i; for(i=0; i<b.length; i++) {System.out.printf("0x%02X ", b[i]); } int copy = Math.min(length - index, b.length); System.arraycopy(b, 0, randBytes, index, copy); index += copy; } } return randBytes; }
From source file:nl.minvenj.pef.pseudo.IPPseudonymizer.java
private byte[] toIPAddressOfSize(final BigInteger bigInt, final int size) { final byte[] bytes = new byte[size]; final byte[] intBytes = bigInt.toByteArray(); if (size == intBytes.length) { System.arraycopy(intBytes, 0, bytes, 0, size); } else if (size < intBytes.length) { System.arraycopy(intBytes, intBytes.length - size, bytes, 0, size); } else {//from w w w .j av a 2 s. c o m System.arraycopy(intBytes, 0, bytes, size - intBytes.length, intBytes.length); } return bytes; }
From source file:com.offbynull.peernetic.common.identification.IdGenerator.java
/** * Generates a {@link Id}./*from w w w . j a v a 2 s.co m*/ * @return a {@link Id} between {@code 0} and {@code limit} * @throws NullPointerException if any arguments are {@code null} */ public Id generate() { try { int rawLen = limit.length; byte[] raw = new byte[rawLen]; random.nextBytes(raw); BigInteger rawBd = new BigInteger(1, raw); BigInteger limitBd = new BigInteger(1, limit); rawBd = rawBd.mod(limitBd); return new Id(rawBd.toByteArray(), limit); } catch (Exception e) { throw new IllegalStateException(e); } }
From source file:org.coinspark.core.CSUtils.java
public static void littleEndianByteArray(BigInteger n, byte[] arr, int off) { if (n == null) { return;/*from ww w . j av a 2 s . c o m*/ } byte[] k = n.toByteArray(); for (int i = 0; i < k.length; i++) { arr[off + i] = k[k.length - i - 1]; } }
From source file:test.integ.be.fedict.trust.Foreigner201305Test.java
@Test public void testForeigner201305() throws Exception { CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509"); X509Certificate rootCert = (X509Certificate) certificateFactory .generateCertificate(Foreigner201305Test.class.getResourceAsStream("/belgiumrca2.crt")); X509Certificate foreigner201304Cert = (X509Certificate) certificateFactory .generateCertificate(Foreigner201305Test.class.getResourceAsStream("/foreigner201304.crt")); foreigner201304Cert.verify(rootCert.getPublicKey()); X509Certificate foreigner201305Cert = (X509Certificate) certificateFactory .generateCertificate(Foreigner201305Test.class.getResourceAsStream("/foreigner201305.crt")); foreigner201305Cert.verify(rootCert.getPublicKey()); byte[] foreigner201304SignatureValue = foreigner201304Cert.getSignature(); byte[] foreigner201305SignatureValue = foreigner201305Cert.getSignature(); LOG.debug("201304 signature size: " + foreigner201304SignatureValue.length); LOG.debug("201305 signature size: " + foreigner201305SignatureValue.length); RSAPublicKey rootPublicKey = (RSAPublicKey) rootCert.getPublicKey(); BigInteger foreigner201304Signature = new BigInteger(foreigner201304SignatureValue); BigInteger foreigner201305Signature = new BigInteger(foreigner201305SignatureValue); LOG.debug("201305 signature size: " + foreigner201305Signature.toByteArray().length); BigInteger foreigner201304PaddedMessage = foreigner201304Signature.modPow(rootPublicKey.getPublicExponent(), rootPublicKey.getModulus()); BigInteger foreigner201305PaddedMessage = foreigner201305Signature.modPow(rootPublicKey.getPublicExponent(), rootPublicKey.getModulus()); LOG.debug(//from w w w .ja va 2s . co m "201304 padded message: " + new String(Hex.encodeHex(foreigner201304PaddedMessage.toByteArray()))); LOG.debug( "201305 padded message: " + new String(Hex.encodeHex(foreigner201305PaddedMessage.toByteArray()))); LOG.debug("201304 modulus size: " + ((RSAPublicKey) foreigner201304Cert.getPublicKey()).getModulus().toByteArray().length); LOG.debug("201305 modulus size: " + ((RSAPublicKey) foreigner201305Cert.getPublicKey()).getModulus().toByteArray().length); LOG.debug("201304 modulus: " + new String( Hex.encodeHex(((RSAPublicKey) foreigner201304Cert.getPublicKey()).getModulus().toByteArray()))); LOG.debug("201305 modulus: " + new String( Hex.encodeHex(((RSAPublicKey) foreigner201305Cert.getPublicKey()).getModulus().toByteArray()))); }