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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.6.
package org.bouncycastle.x509;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.RSASSAPSSparams;
import org.bouncycastle.asn1.teletrust.TeleTrusTObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
import org.bouncycastle.jce.X509Principal;
import org.bouncycastle.util.Strings;
import javax.security.auth.x500.X500Principal;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.Provider;
import java.security.SecureRandom;
import java.security.Security;
import java.security.Signature;
import java.security.SignatureException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
class X509Util
{
private static Hashtable algorithms = new Hashtable();
private static Hashtable params = new Hashtable();
private static Set noParams = new HashSet();
static
{
algorithms.put("MD2WITHRSAENCRYPTION", PKCSObjectIdentifiers.md2WithRSAEncryption);
algorithms.put("MD2WITHRSA", PKCSObjectIdentifiers.md2WithRSAEncryption);
algorithms.put("MD5WITHRSAENCRYPTION", PKCSObjectIdentifiers.md5WithRSAEncryption);
algorithms.put("MD5WITHRSA", PKCSObjectIdentifiers.md5WithRSAEncryption);
algorithms.put("SHA1WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha1WithRSAEncryption);
algorithms.put("SHA1WITHRSA", PKCSObjectIdentifiers.sha1WithRSAEncryption);
algorithms.put("SHA224WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha224WithRSAEncryption);
algorithms.put("SHA224WITHRSA", PKCSObjectIdentifiers.sha224WithRSAEncryption);
algorithms.put("SHA256WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha256WithRSAEncryption);
algorithms.put("SHA256WITHRSA", PKCSObjectIdentifiers.sha256WithRSAEncryption);
algorithms.put("SHA384WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha384WithRSAEncryption);
algorithms.put("SHA384WITHRSA", PKCSObjectIdentifiers.sha384WithRSAEncryption);
algorithms.put("SHA512WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha512WithRSAEncryption);
algorithms.put("SHA512WITHRSA", PKCSObjectIdentifiers.sha512WithRSAEncryption);
algorithms.put("SHA1WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
algorithms.put("SHA224WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
algorithms.put("SHA256WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
algorithms.put("SHA384WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
algorithms.put("SHA512WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
algorithms.put("RIPEMD160WITHRSAENCRYPTION", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160);
algorithms.put("RIPEMD160WITHRSA", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160);
algorithms.put("RIPEMD128WITHRSAENCRYPTION", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128);
algorithms.put("RIPEMD128WITHRSA", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128);
algorithms.put("RIPEMD256WITHRSAENCRYPTION", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256);
algorithms.put("RIPEMD256WITHRSA", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256);
algorithms.put("SHA1WITHDSA", X9ObjectIdentifiers.id_dsa_with_sha1);
algorithms.put("DSAWITHSHA1", X9ObjectIdentifiers.id_dsa_with_sha1);
algorithms.put("SHA224WITHDSA", NISTObjectIdentifiers.dsa_with_sha224);
algorithms.put("SHA256WITHDSA", NISTObjectIdentifiers.dsa_with_sha256);
algorithms.put("SHA1WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA1);
algorithms.put("ECDSAWITHSHA1", X9ObjectIdentifiers.ecdsa_with_SHA1);
algorithms.put("SHA224WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA224);
algorithms.put("SHA256WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA256);
algorithms.put("SHA384WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA384);
algorithms.put("SHA512WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA512);
algorithms.put("GOST3411WITHGOST3410", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94);
algorithms.put("GOST3411WITHGOST3410-94", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94);
algorithms.put("GOST3411WITHECGOST3410", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
algorithms.put("GOST3411WITHECGOST3410-2001", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
algorithms.put("GOST3411WITHGOST3410-2001", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
//
// According to RFC 3279, the ASN.1 encoding SHALL (id-dsa-with-sha1) or MUST (ecdsa-with-SHA*) omit the parameters field.
// The parameters field SHALL be NULL for RSA based signature algorithms.
//
noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA1);
noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA224);
noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA256);
noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA384);
noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA512);
noParams.add(X9ObjectIdentifiers.id_dsa_with_sha1);
noParams.add(NISTObjectIdentifiers.dsa_with_sha224);
noParams.add(NISTObjectIdentifiers.dsa_with_sha256);
//
// RFC 4491
//
noParams.add(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94);
noParams.add(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
//
// explicit params
//
AlgorithmIdentifier sha1AlgId = new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1, new DERNull());
params.put("SHA1WITHRSAANDMGF1", creatPSSParams(sha1AlgId, 20));
AlgorithmIdentifier sha224AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha224, new DERNull());
params.put("SHA224WITHRSAANDMGF1", creatPSSParams(sha224AlgId, 28));
AlgorithmIdentifier sha256AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha256, new DERNull());
params.put("SHA256WITHRSAANDMGF1", creatPSSParams(sha256AlgId, 32));
AlgorithmIdentifier sha384AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha384, new DERNull());
params.put("SHA384WITHRSAANDMGF1", creatPSSParams(sha384AlgId, 48));
AlgorithmIdentifier sha512AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha512, new DERNull());
params.put("SHA512WITHRSAANDMGF1", creatPSSParams(sha512AlgId, 64));
}
private static RSASSAPSSparams creatPSSParams(AlgorithmIdentifier hashAlgId, int saltSize)
{
return new RSASSAPSSparams(
hashAlgId,
new AlgorithmIdentifier(PKCSObjectIdentifiers.id_mgf1, hashAlgId),
new DERInteger(saltSize),
new DERInteger(1));
}
static DERObjectIdentifier getAlgorithmOID(
String algorithmName)
{
algorithmName = Strings.toUpperCase(algorithmName);
if (algorithms.containsKey(algorithmName))
{
return (DERObjectIdentifier)algorithms.get(algorithmName);
}
return new DERObjectIdentifier(algorithmName);
}
static AlgorithmIdentifier getSigAlgID(
DERObjectIdentifier sigOid,
String algorithmName)
{
if (noParams.contains(sigOid))
{
return new AlgorithmIdentifier(sigOid);
}
algorithmName = Strings.toUpperCase(algorithmName);
if (params.containsKey(algorithmName))
{
return new AlgorithmIdentifier(sigOid, (DEREncodable)params.get(algorithmName));
}
else
{
return new AlgorithmIdentifier(sigOid, new DERNull());
}
}
static Iterator getAlgNames()
{
Enumeration e = algorithms.keys();
List l = new ArrayList();
while (e.hasMoreElements())
{
l.add(e.nextElement());
}
return l.iterator();
}
static Signature getSignatureInstance(
String algorithm)
throws NoSuchAlgorithmException
{
return Signature.getInstance(algorithm);
}
static Signature getSignatureInstance(
String algorithm,
String provider)
throws NoSuchProviderException, NoSuchAlgorithmException
{
if (provider != null)
{
return Signature.getInstance(algorithm, provider);
}
else
{
return Signature.getInstance(algorithm);
}
}
static byte[] calculateSignature(
DERObjectIdentifier sigOid,
String sigName,
PrivateKey key,
SecureRandom random,
ASN1Encodable object)
throws IOException, NoSuchAlgorithmException, InvalidKeyException, SignatureException
{
Signature sig;
if (sigOid == null)
{
throw new IllegalStateException("no signature algorithm specified");
}
sig = X509Util.getSignatureInstance(sigName);
if (random != null)
{
sig.initSign(key, random);
}
else
{
sig.initSign(key);
}
sig.update(object.getEncoded(ASN1Encodable.DER));
return sig.sign();
}
static byte[] calculateSignature(
DERObjectIdentifier sigOid,
String sigName,
String provider,
PrivateKey key,
SecureRandom random,
ASN1Encodable object)
throws IOException, NoSuchProviderException, NoSuchAlgorithmException, InvalidKeyException, SignatureException
{
Signature sig;
if (sigOid == null)
{
throw new IllegalStateException("no signature algorithm specified");
}
sig = X509Util.getSignatureInstance(sigName, provider);
if (random != null)
{
sig.initSign(key, random);
}
else
{
sig.initSign(key);
}
sig.update(object.getEncoded(ASN1Encodable.DER));
return sig.sign();
}
static X509Principal convertPrincipal(
X500Principal principal)
{
try
{
return new X509Principal(principal.getEncoded());
}
catch (IOException e)
{
throw new IllegalArgumentException("cannot convert principal");
}
}
static class Implementation
{
Object engine;
Provider provider;
Implementation(
Object engine,
Provider provider)
{
this.engine = engine;
this.provider = provider;
}
Object getEngine()
{
return engine;
}
Provider getProvider()
{
return provider;
}
}
/**
* see if we can find an algorithm (or its alias and what it represents) in
* the property table for the given provider.
*/
static Implementation getImplementation(
String baseName,
String algorithm,
Provider prov)
throws NoSuchAlgorithmException
{
algorithm = Strings.toUpperCase(algorithm);
String alias;
while ((alias = prov.getProperty("Alg.Alias." + baseName + "." + algorithm)) != null)
{
algorithm = alias;
}
String className = prov.getProperty(baseName + "." + algorithm);
if (className != null)
{
try
{
Class cls;
ClassLoader clsLoader = prov.getClass().getClassLoader();
if (clsLoader != null)
{
cls = clsLoader.loadClass(className);
}
else
{
cls = Class.forName(className);
}
return new Implementation(cls.newInstance(), prov);
}
catch (ClassNotFoundException e)
{
throw new IllegalStateException(
"algorithm " + algorithm + " in provider " + prov.getName() + " but no class \"" + className + "\" found!");
}
catch (Exception e)
{
throw new IllegalStateException(
"algorithm " + algorithm + " in provider " + prov.getName() + " but class \"" + className + "\" inaccessible!");
}
}
throw new NoSuchAlgorithmException("cannot find implementation " + algorithm + " for provider " + prov.getName());
}
/**
* return an implementation for a given algorithm/provider.
* If the provider is null, we grab the first avalaible who has the required algorithm.
*/
static Implementation getImplementation(
String baseName,
String algorithm)
throws NoSuchAlgorithmException
{
Provider[] prov = Security.getProviders();
//
// search every provider looking for the algorithm we want.
//
for (int i = 0; i != prov.length; i++)
{
//
// try case insensitive
//
Implementation imp = getImplementation(baseName, Strings.toUpperCase(algorithm), prov[i]);
if (imp != null)
{
return imp;
}
try
{
imp = getImplementation(baseName, algorithm, prov[i]);
}
catch (NoSuchAlgorithmException e)
{
// continue
}
}
throw new NoSuchAlgorithmException("cannot find implementation " + algorithm);
}
static Provider getProvider(String provider)
throws NoSuchProviderException
{
Provider prov = Security.getProvider(provider);
if (prov == null)
{
throw new NoSuchProviderException("Provider " + provider + " not found");
}
return prov;
}
}