invalid radix64 character 2D skipped / read_block: read error: Invalid packet

[Massedil]

Describe the bug

JavaScript alert() pop-up with errors when replying to an email :

invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
invalid radix64 character 2D skipped.
[don't know]: invalid packet (ctb=04).
read_block: read error: Invalid packet

To Reproduce

1. Just reply to the specific email.

Let me know if you need specific header or content from this email to reproduce.

In fact, I don't know how to reproduce because if I try to reply again to the email, it works. Related to network error ?

Expected behavior

No pop-up and the error is handled !

Screenshots
If applicable, add screenshots to help explain your problem.

Please complete the following information:

• Browser: Firefox
• SnappyMail Version: 2.36.3
• Mode: standalone

[the-djmaze]

Sounds like a problem with PGP/GPG as if the it can't import keys or decrypt message or verify signed message.

So do you use encryption?

[Massedil]

So do you use encryption?

No.

[Massedil]

So do you use encryption?

No.

At least I don't remember having done anything to activate it, but may be some default options are activated. But I don't have a pgp key configured for my account. But I sometimes receive pgp signed emails. Maybe I opened a signed email before trying to reply to another and got this error.

[the-djmaze]

The problem is the Autocrypt header of the email.
When you reply, the Autocrypt header is parsed and the PGP key is imported on the server and in OpenPGP.js

snappymail/dev/View/Popup/Compose.js

Lines 914 to 921 in 614c7ac

	oLastMessage.headers().valuesByName('autocrypt').forEach(value => {
	let autocrypt = new MimeHeaderAutocryptModel(value);
	if (autocrypt.addr && autocrypt.keydata) {
	PgpUserStore.hasPublicKeyForEmails([autocrypt.addr])
	|| PgpUserStore.importKey(autocrypt.pem(), true, true)
	// || showScreenPopup(OpenPgpImportPopupView, [autocrypt.pem()])
	}
	});

So something is wrong with the Autocrypt header.
Can you forward such email to me?
To issue-1608@snappymail.eu is fine

[Massedil]

Can you forward such email to me?

I sent by email the problematic Autocrypt header to you. Let me know !

[the-djmaze]

Could you send the whole message and not just the Autocrypt header?

[Massedil]

I just sent you a whole message that triggers the problem described here. Let me know !

[the-djmaze]

The Autocrypt header ends with nrzCXopEosI=
But the javascript code .split('=') and .split('=', 2) dropped the last = and failed.