Receiving invalid packet errors when decryption Ascii Armored data

Seidl, Scott SeidlS at
Wed Apr 7 18:23:20 CEST 2010

No, I haven't done that.  What is the command for doing that (I assume cksum will work)?

Also, assuming the checksums match, what would the next steps be?


Scott Seidl
Schneider National, Inc.
Application Development
3101 S. Packerland Dr.
Green Bay, WI  54313
Work: 920.592.2163
seidls at

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-----Original Message-----
From: Paul Richard Ramer [mailto:free10pro at] 
Sent: Tuesday, April 06, 2010 6:45 PM
To: Seidl, Scott
Cc: gnupg-users at
Subject: Re: Receiving invalid packet errors when decryption Ascii Armored data

Hash: SHA256

On Tue, 6 Apr 2010 14:25:09 -0500, Seidl, Scott wrote:
> I am sending data to a vendor for processing and they are at times having 
issues decrypting our files.  We are ASCII armoring the file before we send
it, and they are receiving a error of:
> gpg: [don't know]: invalid packet (ctb=2d)
> gpg: [don't know]: invalid packet (ctb=2d)
> I've look at the file we sent to them and see no issues or extra data 
around the ASCII Armor header/trailer records.
> Can someone provide more details on what would be causing this error?  
I've seen this with Binary (non- ASCII armored) files.
> I am using GNUPG v 1.4.9 to encrypt the files on a Linux box.  I can tell 
that the vendor is also using GNUPG from the error email I get, but I don't
know the version.

Have you and the vendor compared checksums on the ASCII-armored files to
confirm that the files that you sent and the files that they received
are identical?

- -Paul

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| PGP Key ID: 0x3DB6D884                                              |
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