[Php-java-bridge-users] messageDigest and byte manipulation

[<php...@li...>]

Hi all,


I'm new in the java-bridge technologies and have to create a PHP script to generate and signed an PDF.
My problem come from 'byte' data type. I try to find a solution in archives and FAQ but nothing works...


My java source code ( from http://itextpdf.sourceforge.net/howtosign.html -> How to sign with a timestamp and OCSP in Java) has to be 'traduce' to PHP.
For the rest of the page, I think I'm fine, but when i declare the buf[] and use the messageDigest.update on it, I got unexpected result... (that's why I have a System.out.print("n=" + n) for the debug )

java result: n=191n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=4525
php  result: n=184n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=8192n=6260 Exception... (when i use a array of 'int' instead of 'byte')

[java code]

        byte buf[] = new byte[8192];
        int n;
        while ((n = data.read(buf)) > 0) {
            messageDigest.update(buf, 0, n);
            System.out.print("n=" + n);
        }
        byte hash[] = messageDigest.digest();
        Calendar cal = Calendar.getInstance();
        byte[] ocsp = null;
        if (chain.length >= 2) {
            String url = PdfPKCS7.getOCSPURL((X509Certificate)chain[0]);
            if (url != null && url.length() > 0)
                ocsp = new OcspClientBouncyCastle((X509Certificate)chain[0], (X509Certificate)chain[1], url).getEncoded();
        }
        byte sh[] = sgn.getAuthenticatedAttributeBytes(hash, cal, ocsp);
        sgn.update(sh, 0, sh.length);

        byte[] encodedSig = sgn.getEncodedPKCS7(hash, cal, tsc, ocsp);

        if (contentEstimated + 2 < encodedSig.length)
            throw new Exception("Not enough space");
        byte[] paddedSig = new byte[contentEstimated];
        System.arraycopy(encodedSig, 0, paddedSig, 0, encodedSig.length);

        PdfDictionary dic2 = new PdfDictionary();
        dic2.put(PdfName.CONTENTS, new PdfString(paddedSig).setHexWriting(true));
        sap.close(dic2);


If someone can help to 'traduce in php' this code or just explain my exactly how to produce a array[8192] of byte.

Best regards Antoine 
 		 	   		  
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