public boolean verify(DigestCalculatorProvider calculatorProvider) throws CMSException {
try {
ContentInfo content = digestedData.getEncapContentInfo();
DigestCalculator calc = calculatorProvider.get(digestedData.getDigestAlgorithm());
OutputStream dOut = calc.getOutputStream();
dOut.write(((ASN1OctetString) content.getContent()).getOctets());
return Arrays.areEqual(digestedData.getDigest(), calc.getDigest());
} catch (OperatorCreationException e) {
throw new CMSException("unable to create digest calculator: " + e.getMessage(), e);
} catch (IOException e) {
throw new CMSException("unable process content: " + e.getMessage(), e);
}
}
/**
* Return the digested content
*
* @return the digested content
* @throws CMSException if there is an exception un-compressing the data.
*/
public CMSProcessable getDigestedContent() throws CMSException {
ContentInfo content = digestedData.getEncapContentInfo();
try {
return new CMSProcessableByteArray(
content.getContentType(), ((ASN1OctetString) content.getContent()).getOctets());
} catch (Exception e) {
throw new CMSException("exception reading digested stream.", e);
}
}
public CMSDigestedData(ContentInfo contentInfo) throws CMSException {
this.contentInfo = contentInfo;
try {
this.digestedData = DigestedData.getInstance(contentInfo.getContent());
} catch (ClassCastException e) {
throw new CMSException("Malformed content.", e);
} catch (IllegalArgumentException e) {
throw new CMSException("Malformed content.", e);
}
}
public AlgorithmIdentifier getDigestAlgorithm() {
return digestedData.getDigestAlgorithm();
}