Andrea,
Andrea wrote
> encryption is performed without an owner password being specified. I read
> the specs, the mailing list and looked at the code and my understanding
> from the specs is that "If there is no owner password, use the user
> password instead". As far as I can tell this doesn't happen in iText and a
> random owner password is generated, I would like to know if there's some
> reason for that or if maybe I missed something.
The only part of the specification indication anything in that direction is
> Algorithm 3: Computing the encryption dictionary’s O (owner password)
> value
> a)Pad or truncate the owner password string as described in step (a) of
> "Algorithm 2: Computing an encryption key". If there is no owner password,
> use the user password instead.
In case of a PDF generating library this does not say *if the caller
supplies no owner password*, it says *if there is no owner password.* When
you request a null owner password and the library method you use is
documented as
/**
* Sets the encryption options for this document. The userPassword and
the
* ownerPassword can be null or have zero length. In this case the
ownerPassword
* is replaced by a random string.
then there is an owner password, *a random string*. Thus, this behavior of
iText does not contradict the PDF specification.
Regards, Michael
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