public class CMSAuthenticatedDataParser extends CMSContentInfoParser
Note: that because we are in a streaming mode only one recipient can be tried and it is important that the methods on the parser are called in the appropriate order.
Example of use - assuming the first recipient matches the private key we have.
CMSAuthenticatedDataParser ad = new CMSAuthenticatedDataParser(inputStream); RecipientInformationStore recipients = ad.getRecipientInfos(); Collection c = recipients.getRecipients(); Iterator it = c.iterator(); if (it.hasNext()) { RecipientInformation recipient = (RecipientInformation)it.next(); CMSTypedStream recData = recipient.getContentStream(new JceKeyTransAuthenticatedRecipient(privateKey).setProvider("BC")); processDataStream(recData.getContentStream()); if (!Arrays.equals(ad.getMac(), recipient.getMac()) { System.err.println("Data corrupted!!!!"); } }Note: this class does not introduce buffering - if you are processing large files you should create the parser with:
CMSAuthenticatedDataParser ep = new CMSAuthenticatedDataParser(new BufferedInputStream(inputStream, bufSize));where bufSize is a suitably large buffer size.
_contentInfo, _data
Constructor and Description |
---|
CMSAuthenticatedDataParser(byte[] envelopedData) |
CMSAuthenticatedDataParser(byte[] envelopedData,
DigestCalculatorProvider digestCalculatorProvider) |
CMSAuthenticatedDataParser(java.io.InputStream envelopedData) |
CMSAuthenticatedDataParser(java.io.InputStream envelopedData,
DigestCalculatorProvider digestCalculatorProvider) |
Modifier and Type | Method and Description |
---|---|
org.bouncycastle.asn1.cms.AttributeTable |
getAuthAttrs()
return a table of the unauthenticated attributes indexed by
the OID of the attribute.
|
byte[] |
getContentDigest()
This will only be valid after the content has been read.
|
byte[] |
getMac() |
java.lang.String |
getMacAlgOID()
return the object identifier for the mac algorithm.
|
org.bouncycastle.asn1.x509.AlgorithmIdentifier |
getMacAlgorithm()
Return the MAC algorithm details for the MAC associated with the data in this object.
|
byte[] |
getMacAlgParams()
return the ASN.1 encoded encryption algorithm parameters, or null if
there aren't any.
|
OriginatorInformation |
getOriginatorInfo()
Return the originator information associated with this message if present.
|
RecipientInformationStore |
getRecipientInfos()
return a store of the intended recipients for this message
|
org.bouncycastle.asn1.cms.AttributeTable |
getUnauthAttrs()
return a table of the unauthenticated attributes indexed by
the OID of the attribute.
|
close
public CMSAuthenticatedDataParser(byte[] envelopedData) throws CMSException, java.io.IOException
CMSException
java.io.IOException
public CMSAuthenticatedDataParser(byte[] envelopedData, DigestCalculatorProvider digestCalculatorProvider) throws CMSException, java.io.IOException
CMSException
java.io.IOException
public CMSAuthenticatedDataParser(java.io.InputStream envelopedData) throws CMSException, java.io.IOException
CMSException
java.io.IOException
public CMSAuthenticatedDataParser(java.io.InputStream envelopedData, DigestCalculatorProvider digestCalculatorProvider) throws CMSException, java.io.IOException
CMSException
java.io.IOException
public OriginatorInformation getOriginatorInfo()
public org.bouncycastle.asn1.x509.AlgorithmIdentifier getMacAlgorithm()
public java.lang.String getMacAlgOID()
public byte[] getMacAlgParams()
public RecipientInformationStore getRecipientInfos()
public byte[] getMac() throws java.io.IOException
java.io.IOException
public org.bouncycastle.asn1.cms.AttributeTable getAuthAttrs() throws java.io.IOException
java.io.IOException
public org.bouncycastle.asn1.cms.AttributeTable getUnauthAttrs() throws java.io.IOException
java.io.IOException
public byte[] getContentDigest()