Set PubKeySecurityHandler output stream with DER encoding format

[realityone]

Hi there,

I found an incompatible behavior in PubKeySecurityHandler.

We upgrade bouncycastle in 7.1.14, and change the DEROutputStream to ASN1OutputStream, but as the documentation described, the encoding should be specified as ASN1Encoding.DER.

• https://javadoc.io/static/org.bouncycastle/bcprov-jdk15on/1.64/org/bouncycastle/asn1/DEROutputStream.html

Without this encoding parameter the PDF cannot be opened by Adobe Acrobat.

Here is the pdf generated by test case.

• encryptWithCertificateAes128-DER.pdf
• encryptWithCertificateAes128.pdf

Thanks for reviewing.

[Snipx]

Hi @realityone and thank you for your Pull Request!
Would you mind signing the Contributor License Agreement and send back to us? The details are available at https://itextpdf.com/en/how-buy/legal/itext-contributor-license-agreement

[realityone]

Hi @realityone and thank you for your Pull Request!
Would you mind signing the Contributor License Agreement and send back to us? The details are available at https://itextpdf.com/en/how-buy/legal/itext-contributor-license-agreement

Hi, I have sent the signed iCLA to dev.intern@itextpdf.com.

[yulian-gaponenko]

Hi @realityone

PR was merged to develop: 6919b5c

This fix is quite important and impactful, thanks again for you contribution!