diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/asn1/cms/DigestedData.java')
-rw-r--r-- | core/src/main/java/org/bouncycastle/asn1/cms/DigestedData.java | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/core/src/main/java/org/bouncycastle/asn1/cms/DigestedData.java b/core/src/main/java/org/bouncycastle/asn1/cms/DigestedData.java new file mode 100644 index 00000000..32b7e404 --- /dev/null +++ b/core/src/main/java/org/bouncycastle/asn1/cms/DigestedData.java @@ -0,0 +1,121 @@ +package org.bouncycastle.asn1.cms; + +import org.bouncycastle.asn1.ASN1EncodableVector; +import org.bouncycastle.asn1.ASN1Integer; +import org.bouncycastle.asn1.ASN1Object; +import org.bouncycastle.asn1.ASN1OctetString; +import org.bouncycastle.asn1.ASN1Primitive; +import org.bouncycastle.asn1.ASN1Sequence; +import org.bouncycastle.asn1.ASN1TaggedObject; +import org.bouncycastle.asn1.BERSequence; +import org.bouncycastle.asn1.DEROctetString; +import org.bouncycastle.asn1.x509.AlgorithmIdentifier; + +/** + * RFC 3274 - CMS Digest Data. + * <pre> + * DigestedData ::= SEQUENCE { + * version CMSVersion, + * digestAlgorithm DigestAlgorithmIdentifier, + * encapContentInfo EncapsulatedContentInfo, + * digest Digest } + * </pre> + */ +public class DigestedData + extends ASN1Object +{ + private ASN1Integer version; + private AlgorithmIdentifier digestAlgorithm; + private ContentInfo encapContentInfo; + private ASN1OctetString digest; + + public DigestedData( + AlgorithmIdentifier digestAlgorithm, + ContentInfo encapContentInfo, + byte[] digest) + { + this.version = new ASN1Integer(0); + this.digestAlgorithm = digestAlgorithm; + this.encapContentInfo = encapContentInfo; + this.digest = new DEROctetString(digest); + } + + private DigestedData( + ASN1Sequence seq) + { + this.version = (ASN1Integer)seq.getObjectAt(0); + this.digestAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(1)); + this.encapContentInfo = ContentInfo.getInstance(seq.getObjectAt(2)); + this.digest = ASN1OctetString.getInstance(seq.getObjectAt(3)); + } + + /** + * return a CompressedData object from a tagged object. + * + * @param _ato the tagged object holding the object we want. + * @param _explicit true if the object is meant to be explicitly + * tagged false otherwise. + * @exception IllegalArgumentException if the object held by the + * tagged object cannot be converted. + */ + public static DigestedData getInstance( + ASN1TaggedObject _ato, + boolean _explicit) + { + return getInstance(ASN1Sequence.getInstance(_ato, _explicit)); + } + + /** + * return a CompressedData object from the given object. + * + * @param obj the object we want converted. + * @exception IllegalArgumentException if the object cannot be converted. + */ + public static DigestedData getInstance( + Object obj) + { + if (obj instanceof DigestedData) + { + return (DigestedData)obj; + } + + if (obj != null) + { + return new DigestedData(ASN1Sequence.getInstance(obj)); + } + + return null; + } + + public ASN1Integer getVersion() + { + return version; + } + + public AlgorithmIdentifier getDigestAlgorithm() + { + return digestAlgorithm; + } + + public ContentInfo getEncapContentInfo() + { + return encapContentInfo; + } + + public ASN1Primitive toASN1Primitive() + { + ASN1EncodableVector v = new ASN1EncodableVector(); + + v.add(version); + v.add(digestAlgorithm); + v.add(encapContentInfo); + v.add(digest); + + return new BERSequence(v); + } + + public byte[] getDigest() + { + return digest.getOctets(); + } +} |