Hello there
I run into an odd issue which appears to be related to an extra new line
(\n) character being added around the PGP signature of an email. The
en/decryption of emails is working fine, however signed emails sent via
MailMate show a "Bad signature" when opening the message in MailMate or
Apple Mail.
I noticed the following when running MailMate with `defaults write
com.freron.MailMate MmDebugSecurity -bool YES`:
- sending an email calls `gpg2` to create a detached signature using the
correct signing sub-key
- MailMate calls `gpg2` to validate the signature (passes with GOODSIG)
- MailMate calls `gpg2` to print the available keys based on the signing
key
- the last two calls run again
The used example `Input String`, based on the emails content and the
generated PGP signature, shows a length of 1025 characters during this
process and a "Good signature" on both verification calls. Once the
email arrived, MailMate shows "Bad signature for OpenPGP message" and
the terminal debug output shows that 1027 characters were passed to
`gpg2` which resulted in the "BAD signature" error.
Looking at the string GPG2 used to sign and validate, it appears the two
character difference is a new line character "\n" around the "-----BEGIN
PGP SIGNATURE .." part of the message. Removing those two characters and
attempting to validate the email content + PGP signature via the command
line works fine afterwards.
I am running MailMate 1.7.2 build 4021 with latest GPGTools on OSX
10.9.1. The MailMate preferences have "Experimental features", "OpenPGP"
and "SpamSieve" support enabled. I use a RSA key with the secret key
removed, along with two separate RSA sub-keys for encryption and
signing.
I was unable to find other users having the same problem on this mailing
list and the google was no help, so I would appreciate any insight on
what could cause this problem (and how to fix).
-manuel
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