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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 1.5 to JDK 1.8 with debug enabled.
package org.bouncycastle.pqc.jcajce.provider.mceliece;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.util.DigestFactory;
class Utils
{
static AlgorithmIdentifier getDigAlgId(String digestName)
{
if (digestName.equals("SHA-1"))
{
return new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1, DERNull.INSTANCE);
}
if (digestName.equals("SHA-224"))
{
return new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha224, DERNull.INSTANCE);
}
if (digestName.equals("SHA-256"))
{
return new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha256, DERNull.INSTANCE);
}
if (digestName.equals("SHA-384"))
{
return new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha384, DERNull.INSTANCE);
}
if (digestName.equals("SHA-512"))
{
return new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha512, DERNull.INSTANCE);
}
throw new IllegalArgumentException("unrecognised digest algorithm: " + digestName);
}
static Digest getDigest(AlgorithmIdentifier digest)
{
if (digest.getAlgorithm().equals(OIWObjectIdentifiers.idSHA1))
{
return DigestFactory.createSHA1();
}
if (digest.getAlgorithm().equals(NISTObjectIdentifiers.id_sha224))
{
return DigestFactory.createSHA224();
}
if (digest.getAlgorithm().equals(NISTObjectIdentifiers.id_sha256))
{
return DigestFactory.createSHA256();
}
if (digest.getAlgorithm().equals(NISTObjectIdentifiers.id_sha384))
{
return DigestFactory.createSHA384();
}
if (digest.getAlgorithm().equals(NISTObjectIdentifiers.id_sha512))
{
return DigestFactory.createSHA512();
}
throw new IllegalArgumentException("unrecognised OID in digest algorithm identifier: " + digest.getAlgorithm());
}
}
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