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.
|
closepublic CMSAuthenticatedDataParser(byte[] envelopedData)
throws CMSException,
java.io.IOException
CMSExceptionjava.io.IOExceptionpublic CMSAuthenticatedDataParser(byte[] envelopedData,
DigestCalculatorProvider digestCalculatorProvider)
throws CMSException,
java.io.IOException
CMSExceptionjava.io.IOExceptionpublic CMSAuthenticatedDataParser(java.io.InputStream envelopedData)
throws CMSException,
java.io.IOException
CMSExceptionjava.io.IOExceptionpublic CMSAuthenticatedDataParser(java.io.InputStream envelopedData,
DigestCalculatorProvider digestCalculatorProvider)
throws CMSException,
java.io.IOException
CMSExceptionjava.io.IOExceptionpublic 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.IOExceptionpublic org.bouncycastle.asn1.cms.AttributeTable getAuthAttrs()
throws java.io.IOException
java.io.IOExceptionpublic org.bouncycastle.asn1.cms.AttributeTable getUnauthAttrs()
throws java.io.IOException
java.io.IOExceptionpublic byte[] getContentDigest()