On 2020-09-15 08:42:42 Carlos E. R. wrote:
On 15/09/2020 15.16, J Leslie Turriff wrote:
On 2020-09-15 08:04:27 Carlos E. R. wrote:
On 15/09/2020 14.27, J Leslie Turriff wrote:
On 2020-09-15 06:32:00 Carlos E. R. wrote:
...
cer@Telcontar:~/Cripta/Documentacion/Recibos/Iberdrola/MAD_Elec> pdfsig MAD_Elec_041340672620200629223331242846.pdf Digital Signature Info of: MAD_Elec_041340672620200629223331242846.pdf Signature #1: - Signer Certificate Common Name: FACTURA ELECTRONICA IBERDROLA CLIENTES - Signer full Distinguished Name: C=ES,O=IBERDROLA CLIENTES SAU,OU=CALIDAD SEGURIDAD Y FRAUDE,OID.2.5.4.97=VATES-A95758389,CN=FACTURA ELECTRONICA IBERDROLA CLIENTES - Signing Time: Jul 01 2020 15:41:38 - Signing Hash Algorithm: SHA1 - Signature Type: adbe.pkcs7.sha1 - Signed Ranges: [0 - 311], [15373 - 469237] - Total document signed - Signature Validation: Signature is Valid. - Certificate Validation: Certificate issuer isn't Trusted.
cer@Telcontar:~/Cripta/Documentacion/Recibos/Iberdrola/MAD_Elec>
pdfstudioviewer (java, proprietary) does display signatures.
So it's really a DRM issue, not a PDF reader issue, then.
No no. This is a different issue, a PDF reader issue, not related at all to DRM.
This has been discussed several times in this mail list, so I will just write down the conclusions.
No PDF reader in Linux has all the features that the Adobe Acrobat Reader has, and I don't know why. Simple as that.
There are two issues:
One, verifying cryptographic signatures. See the example I posted above. It is an invoice. The fact that it is signed makes it a legally valid and binding document. It *certifies* that Iberdrola wrote it and that it was not altered.
Notice that LibreOffice can generate those documents, so the feature is doable. There simply is no reader that supports it, except some proprietary readers, or some CLI software.
Another is XFA forms with javascript. This is not part of the PDF standard, it is an Adobe extension. Possibly supporting javascript would be a security nightmare, but there are forms that use it and will not render properly without it. Government administration generated, thus important.
Examples:
Try the US IRS I-9 document: <https://www.uscis.gov/i-9>
http://www.seg-social.es/Internet_6/Pensionistas/Servicios/Solicitudesdepre sta34887/Pensionesotrasprest40968/Prestacionesfamilia41091/index.htm#BIN4108 3_6 http://smarte-forms.com/wp/wp-content/uploads/2011/03/birth-certificate-app lication-eform-tt-sample.pdf
http://www.financnisprava.cz/assets/tiskopisy/IF_5401_20.pdf?201708040722 -> IF_5401_20.pdf?201708040722
Oh, I see. The first certainly is irritating, given that other applications can do it. As you say, the second is probably a security risk, but then, it wouldn't be any more risky than other applications that provide the feature, I suppose. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org