/**
* OpenSpotLight - Open Source IT Governance Platform
*
* Copyright (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA
* or third-party contributors as indicated by the @author tags or express
* copyright attribution statements applied by the authors. All third-party
* contributions are distributed under license by CARAVELATECH CONSULTORIA E
* TECNOLOGIA EM INFORMATICA LTDA.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
***********************************************************************
* OpenSpotLight - Plataforma de Governança de TI de Código Aberto
*
* Direitos Autorais Reservados (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA
* EM INFORMATICA LTDA ou como contribuidores terceiros indicados pela etiqueta
* @author ou por expressa atribuição de direito autoral declarada e atribuída pelo autor.
* Todas as contribuições de terceiros estão distribuídas sob licença da
* CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA.
*
* Este programa é software livre; você pode redistribuí-lo e/ou modificá-lo sob os
* termos da Licença Pública Geral Menor do GNU conforme publicada pela Free Software
* Foundation.
*
* Este programa é distribuído na expectativa de que seja útil, porém, SEM NENHUMA
* GARANTIA; nem mesmo a garantia implícita de COMERCIABILIDADE OU ADEQUAÇÃO A UMA
* FINALIDADE ESPECÍFICA. Consulte a Licença Pública Geral Menor do GNU para mais detalhes.
*
* Você deve ter recebido uma cópia da Licença Pública Geral Menor do GNU junto com este
* programa; se não, escreva para:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.openspotlight.common.util;
import static org.apache.commons.codec.binary.Base64.encodeBase64;
import static org.openspotlight.common.util.Assertions.checkNotNull;
import static org.openspotlight.common.util.Exceptions.logAndReturnNew;
import static org.openspotlight.common.util.Exceptions.logAndThrow;
import java.io.InputStream;
import java.math.BigInteger;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.jasypt.util.digest.Digester;
import org.openspotlight.common.exception.SLRuntimeException;
/**
* Class with sha1 signature method.
*
* @author Luiz Fernando Teston - feu.teston@caravelatech.com
*/
public class Sha1 {
/**
* SHA-1 digester.
*/
private static final Digester DIGESTER = new Digester("SHA-1"); //$NON-NLS-1$
/**
* Should not be instantiated
*/
private Sha1() {
logAndThrow(new IllegalStateException(Messages.getString("invalidConstructor"))); //$NON-NLS-1$
}
/**
* Convert input to hexadecimal format.
*
* @param bytes input
* @return an hexadecimal string
*/
private static String toHexa(final byte[] bytes) {
final StringBuilder s = new StringBuilder();
for (final byte b: bytes) {
final int parteAlta = (b >> 4 & 0xf) << 4;
final int parteBaixa = b & 0xf;
if (parteAlta == 0) {
s.append('0');
}
s.append(Integer.toHexString(parteAlta | parteBaixa));
}
return s.toString();
}
public static BigInteger getNumericSha1Signature(final byte[] content) {
return new BigInteger(getSha1Signature(content));
}
public static BigInteger getNumericSha1Signature(final String content) {
return new BigInteger(getSha1Signature(content));
}
/**
* Returns a sha-1 signature for that content.
*
* @param content
* @return a byte array representing the signature
*/
public static byte[] getSha1Signature(final byte[] content) {
checkNotNull("content", content);//$NON-NLS-1$
try {
return DIGESTER.digest(content);
} catch (final Exception e) {
throw logAndReturnNew(e, SLRuntimeException.class);
}
}
/**
* Returns a sha-1 signature for that content.
*
* @param content
* @return a byte array representing the signature
*/
public static byte[] getSha1Signature(final InputStream content) {
checkNotNull("content", content);//$NON-NLS-1$
try {
if (content.markSupported()) {
content.reset();
}
final ByteArrayOutputStream output = new ByteArrayOutputStream();
IOUtils.copy(content, output);
if (content.markSupported()) {
content.reset();
}
return DIGESTER.digest(output.toByteArray());
} catch (final Exception e) {
throw logAndReturnNew(e, SLRuntimeException.class);
}
}
/**
* A syntax sugar method that returns a sha-1 signature for that content.
*
* @param content
* @return a byte array representing the signature
*/
public static byte[] getSha1Signature(final String content) {
return getSha1Signature(content.getBytes());
}
/**
* Returns a sha-1 signature for that content as a base64 string.
*
* @param content
* @return a base64 string representing the signature
*/
public static String getSha1SignatureEncodedAsBase64(final byte[] content) {
checkNotNull("content", content);//$NON-NLS-1$
try {
final byte[] sha1 = getSha1Signature(content);
final String result = new String(encodeBase64(sha1));
return result;
} catch (final Exception e) {
throw logAndReturnNew(e, SLRuntimeException.class);
}
}
/**
* Returns a sha-1 signature for that content as a base64 string.
*
* @param content
* @return a base64 string representing the signature
*/
public static String getSha1SignatureEncodedAsBase64(final InputStream content) {
checkNotNull("content", content);//$NON-NLS-1$
try {
final byte[] sha1 = getSha1Signature(content);
final String result = new String(encodeBase64(sha1));
return result;
} catch (final Exception e) {
throw logAndReturnNew(e, SLRuntimeException.class);
}
}
/**
* A syntax sugar method that returns a sha-1 signature for that content as an Base64 string.
*
* @param content
* @return sha-1 base64 string
*/
public static String getSha1SignatureEncodedAsBase64(final String content) {
return getSha1SignatureEncodedAsBase64(content.getBytes());
}
/**
* Returns a sha-1 signature for that content as an Hexa string.
*
* @param content
* @return a base64 string representing the signature
*/
public static String getSha1SignatureEncodedAsHexa(final byte[] content) {
checkNotNull("content", content);//$NON-NLS-1$
try {
final byte[] sha1 = getSha1Signature(content);
return toHexa(sha1);
} catch (final Exception e) {
throw logAndReturnNew(e, SLRuntimeException.class);
}
}
/**
* A syntax sugar method that returns a sha-1 signature for that content as an Hexa string.
*
* @param content
* @return a base64 string representing the signature
*/
public static String getSha1SignatureEncodedAsHexa(final String content) {
return getSha1SignatureEncodedAsHexa(content.getBytes());
}
}