Pedro,
P3d3r0s0 wrote:
> joy of joys, its working!
That's great, but I'm a bit surprised. You essentially switched from
PdfSignatureAppearance.SELF_SIGNED to PdfSignatureAppearance.VERISIGN_SIGNED
and in my eyes made the digest calculation very brittle:
P3d3r0s0 wrote:
> // Process of hash/digest generation
> MessageDigest md = MessageDigest.getInstance("SHA-1");
> byte buf[] = new byte[8192];
> int n = 0;
> InputStream rs = appearance.getRangeStream();
> md.reset();
> while ((n = rs.read(buf)) != -1)
> md.update(buf);
> rs.close();
> byte[] hashDig = md.digest();
Here in the loop you now completely ignore the number n of bytes actually
read when updating the MessageDigest object. This might work under
exceptional circumstances but is sure to fail in general. In that respect
your original hashing loop looked safer.
Regards, Michael.
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