One of my friends has some dealings with the Israeli courts.
The noteworthy (and annoying) part of their digital documents is that these documents are using a novel format instead of some industry standard.
Files arriving by email have the SGN suffix, and the email includes the following footer:
המסמך המצורף חתום דיגיטלית. כדי לצפות בקובץ יש להוריד תוכנה בכתובת : https://www.court.gov.il/NGCS.Web.Site/DigitalSignature/Court Digital Signature Application.msi )התוכנה תואמת למערכת הפעלה Windows בלבד(
English Google translation:
The attached document is digitally signed. To view the file you need to download software at: https://www.court.gov.il/NGCS.Web.Site/DigitalSignature/Court Digital Signature Application.msi ) The software is compatible with Windows operating system only (
This friend doesn't have Windows, so how can he read those docs?
From taking a peek in the doc, I saw that it's basically a ginormous XML, with fields containing the following:
- Original filename
- Content, encoded as base64
- Signer identity
I was willing to skip verifying the signer, and settled instead for just extracting the original file.
THe quick solution is:
xq -r '.DocumentEnvelope.SignaturePackage.Signature.Object.DocumentContent["#text"]' | base64 --decode
xq is a
jq-like command for XML. It has a YAML equivalent as well, and was highly useful here.
base64 is a bash utility for decoding/encoding base64 data.
I made a nicer version in my sgn-court-extract repo. I might migrate it to a proper Python script one day.
Feel free to use it yourself!