Java Code Examples for java.math.BigInteger#toString()

/**
	 * same as php do.
	 * 
	 * @param input
	 * @return
	 */
	public static String MD5(String input) {
		String result = input;
		if (input != null) {
			MessageDigest md = null;
			try {
				md = MessageDigest.getInstance("MD5");
				md.update(input.getBytes());
				BigInteger hash = new BigInteger(1, md.digest());
				result = hash.toString(16);
				while (result.length() < 32) {
					result = "0" + result;
				}
			}
			catch (NoSuchAlgorithmException e) {
//				logger.info("Exception:" + e);
			}
		}
		return result;
	}
 

public static String createMD5String(String password) {
    MessageDigest md5;
    try {
        md5 = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        throw new CloudRuntimeException("Error", e);
    }

    md5.reset();
    BigInteger pwInt = new BigInteger(1, md5.digest(password.getBytes()));

    // make sure our MD5 hash value is 32 digits long...
    StringBuffer sb = new StringBuffer();
    String pwStr = pwInt.toString(16);
    int padding = 32 - pwStr.length();
    for (int i = 0; i < padding; i++) {
        sb.append('0');
    }
    sb.append(pwStr);
    return sb.toString();
}
 

@Override
protected Object execute0() throws Exception {
  CrlReason crlReason = CrlReason.forNameOrText(reason);

  if (!CrlReason.PERMITTED_CLIENT_CRLREASONS.contains(crlReason)) {
    throw new InvalidConfException("reason " + reason + " is not permitted");
  }

  Date invalidityDate = null;
  if (isNotBlank(invalidityDateS)) {
    invalidityDate = DateUtil.parseUtcTimeyyyyMMddhhmmss(invalidityDateS);
  }

  BigInteger serialNo = getSerialNumber();
  String msg = "certificate (serial number = 0x" + serialNo.toString(16) + ")";
  try {
    caManager.revokeCertificate(caName, serialNo, crlReason, invalidityDate);
    println("revoked " + msg);
    return null;
  } catch (CaMgmtException ex) {
    throw new CmdFailure("could not revoke " + msg + ", error: " + ex.getMessage(), ex);
  }
}
 

/**
 * return a hexadecimal printed representation of the specified
 * BigInteger object. the value is formatted to fit on lines of
 * at least 75 characters, with embedded newlines. Words are
 * separated for readability, with eight words (32 bytes) per line.
 */
public static String toHexString(BigInteger b) {
    String hexValue = b.toString(16);
    StringBuffer buf = new StringBuffer(hexValue.length()*2);

    if (hexValue.startsWith("-")) {
        buf.append("   -");
        hexValue = hexValue.substring(1);
    } else {
        buf.append("    ");     // four spaces
    }
    if ((hexValue.length()%2) != 0) {
        // add back the leading 0
        hexValue = "0" + hexValue;
    }
    int i=0;
    while (i < hexValue.length()) {
        // one byte at a time
        buf.append(hexValue.substring(i, i+2));
        i+=2;
        if (i!= hexValue.length()) {
            if ((i%64) == 0) {
                buf.append("\n    ");     // line after eight words
            } else if (i%8 == 0) {
                buf.append(" ");     // space between words
            }
        }
    }
    return buf.toString();
}
 

@Callable
public static void callBigIntegerToString(int count) throws IllegalArgumentException{
    byte[] arr1 = new byte[32];
    Arrays.fill(arr1, 0, 32, Byte.MAX_VALUE);
    BigInteger testValue = new BigInteger(arr1);
    for (int i = 0; i < count; i++){
        testValue.toString();
    }
}
 

/**
 * Returns MD5 for the data provided by {@link InputStream} and uses a buffer of the specified length.
 *
 * @param inputStream  data stream to process
 * @param bufferLength buffer length
 * @return MD5 for the data provided by {@link InputStream}
 */
@NotNull
public static String computeMD5 ( @NotNull final InputStream inputStream, final int bufferLength )
{
    final BufferedInputStream bis = new BufferedInputStream ( inputStream );
    try
    {
        final MessageDigest digest = MessageDigest.getInstance ( "MD5" );
        final byte[] buffer = new byte[ bufferLength ];
        int bytesRead;
        while ( ( bytesRead = bis.read ( buffer, 0, buffer.length ) ) > 0 )
        {
            digest.update ( buffer, 0, bytesRead );
        }
        final byte[] md5sum = digest.digest ();
        final BigInteger bigInt = new BigInteger ( 1, md5sum );
        return bigInt.toString ( 16 );
    }
    catch ( final Exception e )
    {
        throw new UtilityException ( "Unable to compute MD5 for InputStream: " + inputStream, e );
    }
    finally
    {
        try
        {
            bis.close ();
        }
        catch ( final Exception ignored )
        {
            //
        }
    }
}
 

public void assertMatchingToString(N value, BigInteger asSigned, BigInteger asUnsigned, String description) {
    String expected = signed
        ? asSigned.toString(radix)
        : asUnsigned.toString(radix);

    String actual = toString.apply(value);

    assertEquals(actual, expected, description + " conversion should be the same");
}
 

/**
 * return a hexadecimal printed representation of the specified
 * BigInteger object. the value is formatted to fit on lines of
 * at least 75 characters, with embedded newlines. Words are
 * separated for readability, with eight words (32 bytes) per line.
 */
public static String toHexString(BigInteger b) {
    String hexValue = b.toString(16);
    StringBuffer buf = new StringBuffer(hexValue.length()*2);

    if (hexValue.startsWith("-")) {
        buf.append("   -");
        hexValue = hexValue.substring(1);
    } else {
        buf.append("    ");     // four spaces
    }
    if ((hexValue.length()%2) != 0) {
        // add back the leading 0
        hexValue = "0" + hexValue;
    }
    int i=0;
    while (i < hexValue.length()) {
        // one byte at a time
        buf.append(hexValue.substring(i, i+2));
        i+=2;
        if (i!= hexValue.length()) {
            if ((i%64) == 0) {
                buf.append("\n    ");     // line after eight words
            } else if (i%8 == 0) {
                buf.append(" ");     // space between words
            }
        }
    }
    return buf.toString();
}
 

/**
 * return a hexadecimal printed representation of the specified
 * BigInteger object. the value is formatted to fit on lines of
 * at least 75 characters, with embedded newlines. Words are
 * separated for readability, with eight words (32 bytes) per line.
 */
public static String toHexString(BigInteger b) {
    String hexValue = b.toString(16);
    StringBuffer buf = new StringBuffer(hexValue.length()*2);

    if (hexValue.startsWith("-")) {
        buf.append("   -");
        hexValue = hexValue.substring(1);
    } else {
        buf.append("    ");     // four spaces
    }
    if ((hexValue.length()%2) != 0) {
        // add back the leading 0
        hexValue = "0" + hexValue;
    }
    int i=0;
    while (i < hexValue.length()) {
        // one byte at a time
        buf.append(hexValue.substring(i, i+2));
        i+=2;
        if (i!= hexValue.length()) {
            if ((i%64) == 0) {
                buf.append("\n    ");     // line after eight words
            } else if (i%8 == 0) {
                buf.append(" ");     // space between words
            }
        }
    }
    return buf.toString();
}
 

/**
 * return a hexadecimal printed representation of the specified
 * BigInteger object. the value is formatted to fit on lines of
 * at least 75 characters, with embedded newlines. Words are
 * separated for readability, with eight words (32 bytes) per line.
 */
public static String toHexString(BigInteger b) {
    String hexValue = b.toString(16);
    StringBuffer buf = new StringBuffer(hexValue.length()*2);

    if (hexValue.startsWith("-")) {
        buf.append("   -");
        hexValue = hexValue.substring(1);
    } else {
        buf.append("    ");     // four spaces
    }
    if ((hexValue.length()%2) != 0) {
        // add back the leading 0
        hexValue = "0" + hexValue;
    }
    int i=0;
    while (i < hexValue.length()) {
        // one byte at a time
        buf.append(hexValue.substring(i, i+2));
        i+=2;
        if (i!= hexValue.length()) {
            if ((i%64) == 0) {
                buf.append("\n    ");     // line after eight words
            } else if (i%8 == 0) {
                buf.append(" ");     // space between words
            }
        }
    }
    return buf.toString();
}
 

/**
 * 根据网络地址生成文件名, 因为有很多网络地址的名称比较怪异. 建议在设计过程中, 接口中考虑文件名. 此方法只是粗暴的解决方法.
 * FIXME: 可优化
 * 
 * @param url
 * @return
 */
public static String generateNameByNetUrl(String url)
{
	byte[] md5 = getMD5(url.getBytes());
	BigInteger bi = new BigInteger(md5).abs();

	return bi.toString(RADIX);
}
 

private static String getUnsignedBigIntegerString(final BigInteger value,
    final COperandTreeNode node, final int radix) {
  // We only need to take care of values which are less than zero.
  if (value.signum() != -1) {
    return value.toString(radix);
  }

  INaviOperandTreeNode currentNode = node.getParent();
  while (currentNode.getType() != ExpressionType.SIZE_PREFIX) {
    if (currentNode.getParent() == null) {
      throw new IllegalStateException("Error: could not determine size of operand.");
    }
    currentNode = currentNode.getParent();
  }

  final BigInteger twosComplement = value.abs().not().add(BigInteger.ONE);
  // TODO(timkornau): The code here uses strings as the current implementation of the operand
  // nodes stores all value information in a string field. To change this the size and value
  // information of an operand node need to be stored in different fields. b/11566525
  switch (currentNode.getValue()) {
    case "byte":
      return twosComplement.and(new BigInteger("FF", 16)).toString(radix);
    case "word":
      return twosComplement.and(new BigInteger("FFFF", 16)).toString(radix);
    case "dword":
      return twosComplement.and(new BigInteger("FFFFFFFF", 16)).toString(radix);
    case "fword":
      return twosComplement.and(new BigInteger("FFFFFFFFFFFF", 16)).toString(radix);
    case "qword":
      return twosComplement.and(new BigInteger("FFFFFFFFFFFFFFFF", 16)).toString(radix);
    case "oword":
      return twosComplement.and(new BigInteger("FFFFFFFFFFFFFFFFFFFF", 16)).toString(radix);
    default:
      throw new IllegalStateException("Error: size of operand tree node is not supported.");
  }
}
 

@Override
public String toString(BigInteger value) {
	return value.toString(16);
}
 

/**
 * Convert a list of Numeric Compacted codewords from Base 900 to Base 10.
 *
 * @param codewords The array of codewords
 * @param count     The number of codewords
 * @return The decoded string representing the Numeric data.
 */
/*
   EXAMPLE
   Encode the fifteen digit numeric string 000213298174000
   Prefix the numeric string with a 1 and set the initial value of
   t = 1 000 213 298 174 000
   Calculate codeword 0
   d0 = 1 000 213 298 174 000 mod 900 = 200

   t = 1 000 213 298 174 000 div 900 = 1 111 348 109 082
   Calculate codeword 1
   d1 = 1 111 348 109 082 mod 900 = 282

   t = 1 111 348 109 082 div 900 = 1 234 831 232
   Calculate codeword 2
   d2 = 1 234 831 232 mod 900 = 632

   t = 1 234 831 232 div 900 = 1 372 034
   Calculate codeword 3
   d3 = 1 372 034 mod 900 = 434

   t = 1 372 034 div 900 = 1 524
   Calculate codeword 4
   d4 = 1 524 mod 900 = 624

   t = 1 524 div 900 = 1
   Calculate codeword 5
   d5 = 1 mod 900 = 1
   t = 1 div 900 = 0
   Codeword sequence is: 1, 624, 434, 632, 282, 200

   Decode the above codewords involves
     1 x 900 power of 5 + 624 x 900 power of 4 + 434 x 900 power of 3 +
   632 x 900 power of 2 + 282 x 900 power of 1 + 200 x 900 power of 0 = 1000213298174000

   Remove leading 1 =>  Result is 000213298174000
 */
private static String decodeBase900toBase10(int[] codewords, int count) throws FormatException {
  BigInteger result = BigInteger.ZERO;
  for (int i = 0; i < count; i++) {
    result = result.add(EXP900[count - i - 1].multiply(BigInteger.valueOf(codewords[i])));
  }
  String resultString = result.toString();
  if (resultString.charAt(0) != '1') {
    throw FormatException.getFormatInstance();
  }
  return resultString.substring(1);
}
 

@Override
public List<String[]> generateVmData(String userData, String serviceOffering, long datacenterId,
                                     String vmName, String vmHostName, long vmId, String vmUuid,
                                     String guestIpAddress, String publicKey, String password, Boolean isWindows) {

    DataCenterVO dcVo = _dcDao.findById(datacenterId);
    final String zoneName = dcVo.getName();

    IPAddressVO publicIp = _ipAddressDao.findByAssociatedVmId(vmId);

    final List<String[]> vmData = new ArrayList<String[]>();

    if (userData != null) {
        vmData.add(new String[]{USERDATA_DIR, USERDATA_FILE, userData});
    }
    vmData.add(new String[]{METATDATA_DIR, SERVICE_OFFERING_FILE, StringUtils.unicodeEscape(serviceOffering)});
    vmData.add(new String[]{METATDATA_DIR, AVAILABILITY_ZONE_FILE, StringUtils.unicodeEscape(zoneName)});
    vmData.add(new String[]{METATDATA_DIR, LOCAL_HOSTNAME_FILE, StringUtils.unicodeEscape(vmHostName)});
    vmData.add(new String[]{METATDATA_DIR, LOCAL_IPV4_FILE, guestIpAddress});

    String publicIpAddress = guestIpAddress;
    String publicHostName = StringUtils.unicodeEscape(vmHostName);

    if (dcVo.getNetworkType() != DataCenter.NetworkType.Basic) {
        if (publicIp != null) {
            publicIpAddress = publicIp.getAddress().addr();
            publicHostName = publicIp.getAddress().addr();
        } else {
            publicHostName = null;
        }
    }
    vmData.add(new String[]{METATDATA_DIR, PUBLIC_IPV4_FILE, publicIpAddress});
    vmData.add(new String[]{METATDATA_DIR, PUBLIC_HOSTNAME_FILE, publicHostName});

    if (vmUuid == null) {
        vmData.add(new String[]{METATDATA_DIR, INSTANCE_ID_FILE, vmName});
        vmData.add(new String[]{METATDATA_DIR, VM_ID_FILE, String.valueOf(vmId)});
    } else {
        vmData.add(new String[]{METATDATA_DIR, INSTANCE_ID_FILE, vmUuid});
        vmData.add(new String[]{METATDATA_DIR, VM_ID_FILE, vmUuid});
    }

    vmData.add(new String[]{METATDATA_DIR, PUBLIC_KEYS_FILE, publicKey});

    String cloudIdentifier = _configDao.getValue("cloud.identifier");
    if (cloudIdentifier == null) {
        cloudIdentifier = "";
    } else {
        cloudIdentifier = "CloudStack-{" + cloudIdentifier + "}";
    }
    vmData.add(new String[]{METATDATA_DIR, CLOUD_IDENTIFIER_FILE, cloudIdentifier});

    if (password != null && !password.isEmpty() && !password.equals("saved_password")) {

        // Here we are calculating MD5 checksum to reduce the over head of calculating MD5 checksum
        // in windows VM in password reset script.

        if (isWindows) {
            MessageDigest md5 = null;
            try {
                md5 = MessageDigest.getInstance("MD5");
            } catch (NoSuchAlgorithmException e) {
                s_logger.error("Unexpected exception " + e.getMessage(), e);
                throw new CloudRuntimeException("Unable to get MD5 MessageDigest", e);
            }
            md5.reset();
            md5.update(password.getBytes(StringUtils.getPreferredCharset()));
            byte[] digest = md5.digest();
            BigInteger bigInt = new BigInteger(1, digest);
            String hashtext = bigInt.toString(16);

            vmData.add(new String[]{PASSWORD_DIR, PASSWORD_CHECKSUM_FILE, hashtext});
        }

        vmData.add(new String[]{PASSWORD_DIR, PASSWORD_FILE, password});
    }

    return vmData;
}
 

public static String _printInteger(BigInteger val) {
    return val.toString();
}
 

@Override
public String generate(String imageUri) {
	byte[] md5 = getMD5(imageUri.getBytes());
	BigInteger bi = new BigInteger(md5).abs();
	return bi.toString(RADIX);
}
 

private String getRandomName( )
{
    Random rand = new SecureRandom( );
    BigInteger bigInt = new BigInteger( 128, rand );
    return "junit" + bigInt.toString( 36 );
}
 

/**
 * <p>Given a domain index and an element index, return the element's name.
 * Called by the toStringWithDomains() function.</p>
 * 
 * @param i the domain number
 * @param j the element number
 * @return the string representation of that element
 */
public String elementName(int i, BigInteger j) {
    return j.toString();
}
 

/**
 * converts a byte array to a binary String
 *
 * @param value the byte array to be converted
 * @return the binary string representation of the byte array
 */
public static String toBinaryString(byte[] value) {
    BigInteger helpBigInteger = new BigInteger(1, value);

    return helpBigInteger.toString(2);
}