package org.bouncycastle.asn1.cms; import java.io.IOException; import org.bouncycastle.asn1.ASN1Encodable; import org.bouncycastle.asn1.ASN1Integer; import org.bouncycastle.asn1.ASN1OctetString; import org.bouncycastle.asn1.ASN1SequenceParser; import org.bouncycastle.asn1.ASN1SetParser; import org.bouncycastle.asn1.ASN1TaggedObject; import org.bouncycastle.asn1.ASN1TaggedObjectParser; import org.bouncycastle.asn1.BERTags; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; /** * Parse {@link AuthenticatedData} stream. * <pre> * AuthenticatedData ::= SEQUENCE { * version CMSVersion, * originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL, * recipientInfos RecipientInfos, * macAlgorithm MessageAuthenticationCodeAlgorithm, * digestAlgorithm [1] DigestAlgorithmIdentifier OPTIONAL, * encapContentInfo EncapsulatedContentInfo, * authAttrs [2] IMPLICIT AuthAttributes OPTIONAL, * mac MessageAuthenticationCode, * unauthAttrs [3] IMPLICIT UnauthAttributes OPTIONAL } * * AuthAttributes ::= SET SIZE (1..MAX) OF Attribute * * UnauthAttributes ::= SET SIZE (1..MAX) OF Attribute * * MessageAuthenticationCode ::= OCTET STRING * </pre> */ public class AuthenticatedDataParser { private ASN1SequenceParser seq; private ASN1Integer version; private ASN1Encodable nextObject; private boolean originatorInfoCalled; public AuthenticatedDataParser( ASN1SequenceParser seq) throws IOException { this.seq = seq; this.version = ASN1Integer.getInstance(seq.readObject()); } public ASN1Integer getVersion() { return version; } public OriginatorInfo getOriginatorInfo() throws IOException { originatorInfoCalled = true; if (nextObject == null) { nextObject = seq.readObject(); } if (nextObject instanceof ASN1TaggedObjectParser && ((ASN1TaggedObjectParser)nextObject).getTagNo() == 0) { ASN1SequenceParser originatorInfo = (ASN1SequenceParser) ((ASN1TaggedObjectParser)nextObject).getObjectParser(BERTags.SEQUENCE, false); nextObject = null; return OriginatorInfo.getInstance(originatorInfo.toASN1Primitive()); } return null; } public ASN1SetParser getRecipientInfos() throws IOException { if (!originatorInfoCalled) { getOriginatorInfo(); } if (nextObject == null) { nextObject = seq.readObject(); } ASN1SetParser recipientInfos = (ASN1SetParser)nextObject; nextObject = null; return recipientInfos; } public AlgorithmIdentifier getMacAlgorithm() throws IOException { if (nextObject == null) { nextObject = seq.readObject(); } if (nextObject != null) { ASN1SequenceParser o = (ASN1SequenceParser)nextObject; nextObject = null; return AlgorithmIdentifier.getInstance(o.toASN1Primitive()); } return null; } public AlgorithmIdentifier getDigestAlgorithm() throws IOException { if (nextObject == null) { nextObject = seq.readObject(); } if (nextObject instanceof ASN1TaggedObjectParser) { AlgorithmIdentifier obj = AlgorithmIdentifier.getInstance((ASN1TaggedObject)nextObject.toASN1Primitive(), false); nextObject = null; return obj; } return null; } /** * @deprecated use getEncapsulatedContentInfo() */ public ContentInfoParser getEnapsulatedContentInfo() throws IOException { return getEncapsulatedContentInfo(); } public ContentInfoParser getEncapsulatedContentInfo() throws IOException { if (nextObject == null) { nextObject = seq.readObject(); } if (nextObject != null) { ASN1SequenceParser o = (ASN1SequenceParser)nextObject; nextObject = null; return new ContentInfoParser(o); } return null; } public ASN1SetParser getAuthAttrs() throws IOException { if (nextObject == null) { nextObject = seq.readObject(); } if (nextObject instanceof ASN1TaggedObjectParser) { ASN1Encodable o = nextObject; nextObject = null; return (ASN1SetParser)((ASN1TaggedObjectParser)o).getObjectParser(BERTags.SET, false); } return null; } public ASN1OctetString getMac() throws IOException { if (nextObject == null) { nextObject = seq.readObject(); } ASN1Encodable o = nextObject; nextObject = null; return ASN1OctetString.getInstance(o.toASN1Primitive()); } public ASN1SetParser getUnauthAttrs() throws IOException { if (nextObject == null) { nextObject = seq.readObject(); } if (nextObject != null) { ASN1Encodable o = nextObject; nextObject = null; return (ASN1SetParser)((ASN1TaggedObjectParser)o).getObjectParser(BERTags.SET, false); } return null; } }