Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Werner Koch
On Wed, 14 Jan 2015 17:40, patrick-mailingli...@whonix.org said:

 Do you mean, for example, the signature could be valid, but the key that
 signed it could be revoked and gpg would still exit 0?

Sure.  It is just to complex to put it into one number.  Consider the
case for multiple signatures - who is going to decide whether the
signature is valid.  This has all been discussed about 15 years ago
with the result of writing the gpgv binary which is suitable for most
automated signature verification use cases.


Shalom-Salam,

   Werner

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Specifying passphrase for batch key generation

2015-01-14 Thread Joey Castillo
Reading the manual for batch GPG key generation in GnuPG 2.1, I see
the following note:

 Since GnuPG version 2.1 it is not anymore possible to specify a passphrase 
 for unattended key generation. The passphrase command is simply ignored and 
 ‘%ask-passpharse’ is thus implicitly enabled.

I'm running into an issue now with a module I was using to generate
keys in a python script (python-gnupg). Its method was to generate a
set of parameters, including the passphrase parameter, and pass that
via stdin to gpg --batch --gen-key.

Now that we cannot specify a passphrase in the batch parameters, what
is the preferred method for batch key generation with a specified
passphrase?

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Re: Specifying passphrase for batch key generation

2015-01-14 Thread Johan Wevers
On 14-01-2015 21:59, Joey Castillo wrote:

 Now that we cannot specify a passphrase in the batch parameters, what
 is the preferred method for batch key generation with a specified
 passphrase?

Use GnuPG 1.4.18.

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Problems when encrypting to a group on MacGPG

2015-01-14 Thread Anthony Papillion
Hello Everyone,

I'm trying to help someone configure MacGPG 2.0.22. I've defined a group
with multiple keys in it. But when I try to encrypt to the group to test
things, I get the following error:

gpg: O g: can't encode a 256 bit key in a 0 bit frame

This happens after I tell the program to accept the final key in the
group as valid. But it doesn't seem to be related to a key since I've
deleted the final key and it still give me the error.

Any idea what might be causing this? Thanks!

Thanks,
Anthony

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Re: Problems when encrypting to a group on MacGPG

2015-01-14 Thread Doug Barton

On 1/14/15 7:09 PM, Anthony Papillion wrote:

gpg: O g: can't encode a 256 bit key in a 0 bit frame

This happens after I tell the program to accept the final key in the
group as valid. But it doesn't seem to be related to a key since I've
deleted the final key and it still give me the error.


You're on the right track  delete some more keys, test again, repeat 
till you find the key causing problems. Depending on the number of keys 
it may be easier to add/delete a few at a time, do a binary search, etc.


Good luck,

Doug


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Re: Problems when encrypting to a group on MacGPG

2015-01-14 Thread Murthy, Sandeep

I use Mac GPG2, but I’ve never had this problem.

You could try posting this to the MacGPG2 support page
which is here

http://support.gpgtools.org/

Sandeep Murthy
s.mur...@mykolab.com


On 2015-01-15 03:09, Anthony Papillion wrote:

Hello Everyone,

I'm trying to help someone configure MacGPG 2.0.22. I've defined a 
group
with multiple keys in it. But when I try to encrypt to the group to 
test

things, I get the following error:

gpg: O g: can't encode a 256 bit key in a 0 bit frame

This happens after I tell the program to accept the final key in the
group as valid. But it doesn't seem to be related to a key since I've
deleted the final key and it still give me the error.

Any idea what might be causing this? Thanks!

Thanks,
Anthony

--
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Phone:   1.918.631.7331
XMPP Chat:   cyp...@chat.cpunk.us
Fingerprint: 65EF73EC 8B57F6B1 8C475BD4 426088AC FE21B251
PGP Key: http://www.cajuntechie.org/p/my-pgp-key.html

To any NSA and FBI agents reading my email: please consider whether
defending the US Constitution against all enemies, foreign or domestic,
requires you to follow Edward Snowden's example.


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Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Sandeep Murthy
I know that all processes have an exit code, what I meant was
if you invoke gpg interactively like gpg —edit-key key ID /email
and then execute a wrong subcommand or specify something incorrectly
then the gpg exit code will not reflect this unless the subcommand
launches another process.

Sandeep Murthy
s.mur...@mykolab.com

 On 14 Jan 2015, at 13:40, Daniel Kahn Gillmor d...@fifthhorseman.net wrote:
 
 On Wed 2015-01-14 08:22:45 -0500, Sandeep Murthy wrote:
 Exit codes in shells indicate problems relating to completion or disruption
 of the child process invoked by a parent process.
 
 They will not record unsuccessful events inside the child process
 related to program functions, i.e. if you inside gpg editing a key
 and enter an incorrect subcommand or use it incorrectly then this will
 not affect the exit code, I don’t think.
 
 This is not the case.  all processes have a return code, whether they
 are invoked by a shell or by other processes.  The return code is a
 critical part of the output of a program.
 
 gpg does use the return code to indicate failure of signature
 verification.
 
 consider the results of:
 
   echo test1  test1.txt
   echo test2  test2.txt
   gpg --detach-sign --armor test1.txt
   gpg --verify test1.txt.asc test1.txt
   gpg --verify test1.txt.asc test2.txt
 
 the return value of the first --verify should be 0, but the second
 --verify invocation should return 1, indicating that the signature
 cannot be verified over the (different) contents of test2.txt
 
  --dkg


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Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Werner Koch
On Wed, 14 Jan 2015 14:40, d...@fifthhorseman.net said:

 gpg does use the return code to indicate failure of signature
 verification.

But recall that success does not mean that the signature is good.
Check the status output or use gpgv.

Shalom-Salam,

   Werner

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Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Patrick Schleizer
Werner Koch:
 On Wed, 14 Jan 2015 14:40, d...@fifthhorseman.net said:
 
 gpg does use the return code to indicate failure of signature
 verification.
 
 But recall that success does not mean that the signature is good.
 Check the status output or use gpgv.

Do you mean, for example, the signature could be valid, but the key that
signed it could be revoked and gpg would still exit 0?

Or can you tell another example please where gpg would exit 0, but where
where the signature is bad?


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Is there a shell script or bash library for parsing gpg's --status-fd output?

2015-01-14 Thread Patrick Schleizer
Hi!

Is there a shell script or bash library for parsing gpg's --status-fd
output?

I mean, I could code it myself. But why duplicate effort and risk
messing up. Maybe there is some existing or even recommended or even
official library to do this?

(What I mean by parsing is: to get from lines such as [GNUPG:] GOODSIG
416... to variables such as goodsig=true, fingerprint=416... and so forth.)

Cheers,
Patrick


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Re: Vanity Keys

2015-01-14 Thread Johan Wevers
On 13-01-2015 21:38, Werner Koch wrote:

 Well, we could also change the code
 to trial verify with all key ids but that takes longer than needed and
 may by itself be used as a DoS.

You don't need to test all keyID's - just those with the same key ID.
Assuming this is a rare occasion and someone's keyring is not flooded
with keys with the same ID (in that case you are probably under some
kind of attack and might investigate), you can even detect and store
this condition somewere when importing the key and checking this
probably very short list if key ID's that appear multiple times.

I wonder what this would do with the keyserver network. They probably
need adapting too.

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Re: More strangeness.

2015-01-14 Thread Werner Koch
On Tue, 13 Jan 2015 21:33, dgouttegat...@incenp.org said:

 [2] https://bugs.g10code.com/gnupg/issue1794

Right, this is a blocker for a 2.1.2 release.


Shalom-Salam,

   Werner

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Re: Issuer Fingerprint

2015-01-14 Thread Werner Koch
On Wed, 14 Jan 2015 00:54, 2014-667rhzu3dc-lists-gro...@riseup.net said:

 I thought we already took care of this with
 sig-notation issuer-...@notations.openpgp.fifthhorseman.net=%g [0]

But GnuPG does not know about this - it is Dkg's private thing.  Further
this triples the required size for each signature.

If we would do that with notaion data something like iss...@gnupg.org=
would be used.  But see the discussion on gnupg-devel.


Salam-Shalom,

   Werner

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Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Sandeep Murthy
 Are there cases where gpg --verify will exit 0, even if verification failed?

Verification could fail internally within the gpg program, or externally because
the signature fie does not exist or is incorrectly named or maybe corrupt
e.g.

[srm@~]$ gpg --verify asig.sig; echo $?
gpg: can't open `asig.sig': No such file or directory
gpg: verify signatures failed: No such file or directory
2

Exit codes in shells indicate problems relating to completion or disruption
of the child process invoked by a parent process.

They will not record unsuccessful events inside the child process
related to program functions, i.e. if you inside gpg editing a key
and enter an incorrect subcommand or use it incorrectly then this will
not affect the exit code, I don’t think.

Sandeep Murthy
s.mur...@mykolab.com

 On 14 Jan 2015, at 07:51, Dave Pawson dave.paw...@gmail.com wrote:
 
 In Unix terms, a program that has run successfully to completion
 exits with status zero, no 'extra' semantic attached?
 
 Dave
 
 On 13 January 2015 at 19:03, Patrick Schleizer
 patrick-mailingli...@whonix.org wrote:
 In another thread...
 
 Werner Koch
 On Mon, 12 Jan 2015 19:52, patrick-
 When it exits 0, then this approach is sound, sane and fine?
 You better check the status lines; in particular watch out for
 
  [GNUPG:] VALIDSIG E4B868C8F90C.
 
 or use gpgv.
 
 Are there cases where gpg --verify will exit 0, even if verification failed?
 
 (Suppose one uses a separate --homedir where only legitimate signing
 keys are imported.)
 
 
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Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Dave Pawson
In Unix terms, a program that has run successfully to completion
exits with status zero, no 'extra' semantic attached?

Dave

On 13 January 2015 at 19:03, Patrick Schleizer
patrick-mailingli...@whonix.org wrote:
 In another thread...

 Werner Koch
 On Mon, 12 Jan 2015 19:52, patrick-
 When it exits 0, then this approach is sound, sane and fine?
 You better check the status lines; in particular watch out for

   [GNUPG:] VALIDSIG E4B868C8F90C.

 or use gpgv.

 Are there cases where gpg --verify will exit 0, even if verification failed?

 (Suppose one uses a separate --homedir where only legitimate signing
 keys are imported.)


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Re: Are there cases where gpg --verify will exit 0, even if verification failed?

2015-01-14 Thread Kristian Fiskerstrand
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA512

On 01/14/2015 02:40 PM, Daniel Kahn Gillmor wrote:
 On Wed 2015-01-14 08:22:45 -0500, Sandeep Murthy wrote:
 Exit codes in shells indicate problems relating to completion or
 disruption of the child process invoked by a parent process.
 


..

 
 the return value of the first --verify should be 0, but the second 
 --verify invocation should return 1, indicating that the signature 
 cannot be verified over the (different) contents of test2.txt

But iirc you will anyways have to check the status-fd for the validity
of the issuing key.

- -- 
- 
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Blog: http://blog.sumptuouscapital.com
Twitter: @krifisk
- 
Public OpenPGP key 0xE3EDFAE3 at hkp://pool.sks-keyservers.net
fpr:94CB AFDD 3034 5109 5618 35AA 0B7F 8B60 E3ED FAE3
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support of Paul.
(George Bernard Shaw)
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