[pkg-gnupg-maint] Bug#878812: Bug#878812: hits bug_at when encrypting to 1A6F3E639A4467E8C3476525DF6D76C44D696F6B

[NIIBE Yutaka]

Guido Günther <agx at sigxcpu.org> wrote:
>> >                 #4  0x0000556a0f29306f bug_at (gpg)
>> >                 #5  0x0000556a0f243c1e do_we_trust (gpg)
>> >                 #6  0x0000556a0f243fff find_and_check_key (gpg)
>> >                 #7  0x0000556a0f2455b6 find_and_check_key (gpg)
>> >                 #8  0x0000556a0f24b6c2 encrypt_crypt (gpg)
>> >                 #9  0x0000556a0f203563 main (gpg)
>> >                 #10 0x00007fd58eee12e1 __libc_start_main (libc.so.6)
>> >                 #11 0x0000556a0f2054da _start (gpg)
[...]
> I can trivially reproduce this without having mutt involved like:
>
> $ gpg  --encrypt --armor --always-trust -r 1A6F3E639A4467E8C3476525DF6D76C44D696F6B
> gpg: Ohhhh jeeee: ... this is a bug (../../g10/pkclist.c:417:do_we_trust)
> Aborted (core dumped)
>
> Where the above key is from the debian-keyring package.

Could you please try with --debug=8192 option (debug for key lookup)?

Here, I cannot replicate with Debian's gnupg 2.2.1-2. 

When key search, it failed as expired, and it didn't go the code path to
do_we_trust.

====================
$ /usr/bin/gpg --debug=8192 --encrypt --armor --always-trust -r 1A6F3E639A4467E8C3476525DF6D76C44D696F6B
gpg: enabled debug flags: lookup
gpg: DBG: keydb_search: 1 search descriptions:
gpg: DBG: keydb_search   0: FPR20: '1A6F 3E63 9A44 67E8 C347  6525 DF6D 76C4 4D69 6F6B'
gpg: DBG: keydb_search: searching keybox (resource 0 of 1)
gpg: DBG: keydb_search: searched keybox (resource 0 of 1) => Success
gpg: DBG: finish_lookup: checking key 4D696F6B (all)(req_usage=2)
gpg: DBG: 	checking subkey ED764C3A
gpg: DBG: 	subkey has expired
gpg: DBG: 	checking subkey 217028C2
gpg: DBG: 	usage does not match: want=2 have=1
gpg: DBG: 	no suitable subkeys found - trying primary
gpg: DBG: 	primary key usage does not match: want=2 have=5
gpg: DBG: 	no suitable key found -  giving up
gpg: DBG: keydb_search: 1 search descriptions:
gpg: DBG: keydb_search   0: FPR20: '1A6F 3E63 9A44 67E8 C347  6525 DF6D 76C4 4D69 6F6B'
gpg: DBG: keydb_search: searching keybox (resource 0 of 1)
gpg: DBG: keydb_search: searched keybox (resource 0 of 1) => EOF
gpg: 1A6F3E639A4467E8C3476525DF6D76C44D696F6B: skipped: Unusable public key
gpg: [stdin]: encryption failed: Unusable public key
gpg: secmem usage: 0/65536 bytes in 0 blocks
$
====================
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