All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.bouncycastle.asn1.cms.CMSAlgorithmProtection Maven / Gradle / Ivy

Go to download

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.

The newest version!
package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/**
 * From RFC 6211
 * 
 * CMSAlgorithmProtection ::= SEQUENCE {
 *    digestAlgorithm         DigestAlgorithmIdentifier,
 *    signatureAlgorithm  [1] SignatureAlgorithmIdentifier OPTIONAL,
 *    macAlgorithm        [2] MessageAuthenticationCodeAlgorithm
 *                                     OPTIONAL
 * }
 * (WITH COMPONENTS { signatureAlgorithm PRESENT,
 *                    macAlgorithm ABSENT } |
 *  WITH COMPONENTS { signatureAlgorithm ABSENT,
 *                    macAlgorithm PRESENT })
 * 
*/ public class CMSAlgorithmProtection extends ASN1Object { public static final int SIGNATURE = 1; public static final int MAC = 2; private final AlgorithmIdentifier digestAlgorithm; private final AlgorithmIdentifier signatureAlgorithm; private final AlgorithmIdentifier macAlgorithm; public CMSAlgorithmProtection(AlgorithmIdentifier digestAlgorithm, int type, AlgorithmIdentifier algorithmIdentifier) { if (digestAlgorithm == null || algorithmIdentifier == null) { throw new NullPointerException("AlgorithmIdentifiers cannot be null"); } this.digestAlgorithm = digestAlgorithm; if (type == 1) { this.signatureAlgorithm = algorithmIdentifier; this.macAlgorithm = null; } else if (type == 2) { this.signatureAlgorithm = null; this.macAlgorithm = algorithmIdentifier; } else { throw new IllegalArgumentException("Unknown type: " + type); } } private CMSAlgorithmProtection(ASN1Sequence sequence) { if (sequence.size() != 2) { throw new IllegalArgumentException("Sequence wrong size: One of signatureAlgorithm or macAlgorithm must be present"); } this.digestAlgorithm = AlgorithmIdentifier.getInstance(sequence.getObjectAt(0)); ASN1TaggedObject tagged = ASN1TaggedObject.getInstance(sequence.getObjectAt(1)); if (tagged.getTagNo() == 1) { this.signatureAlgorithm = AlgorithmIdentifier.getInstance(tagged, false); this.macAlgorithm = null; } else if (tagged.getTagNo() == 2) { this.signatureAlgorithm = null; this.macAlgorithm = AlgorithmIdentifier.getInstance(tagged, false); } else { throw new IllegalArgumentException("Unknown tag found: " + tagged.getTagNo()); } } public static CMSAlgorithmProtection getInstance( Object obj) { if (obj instanceof CMSAlgorithmProtection) { return (CMSAlgorithmProtection)obj; } else if (obj != null) { return new CMSAlgorithmProtection(ASN1Sequence.getInstance(obj)); } return null; } public AlgorithmIdentifier getDigestAlgorithm() { return digestAlgorithm; } public AlgorithmIdentifier getMacAlgorithm() { return macAlgorithm; } public AlgorithmIdentifier getSignatureAlgorithm() { return signatureAlgorithm; } public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(digestAlgorithm); if (signatureAlgorithm != null) { v.add(new DERTaggedObject(false, 1, signatureAlgorithm)); } if (macAlgorithm != null) { v.add(new DERTaggedObject(false, 2, macAlgorithm)); } return new DERSequence(v); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy