question: public Collection engineGenerateCRLs ( InputStream inStream ) throws CRLException { CRL crl ; List crls = new ArrayList ( ) ; while ( ( crl = engineGenerateCRL ( inStream ) ) != null ) { crls . add ( crl ) ; } return crls ; }
target:  Returns a (possibly empty) collection view of the CRLs read from the given input stream inStream. The inStream may contain a sequence of DER-encoded CRLs, or a PKCS#7 CRL set.  This is a PKCS#7 SignedData object, with the only signficant field being crls.  In particular the signature and the contents are ignored.