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From: Eli Zaretskii <eliz@gnu.org>
To: tzz@lifelogs.com
Cc: emacs-devel@gnu.org
Subject: Re: libnettle/libhogweed WIP
Date: Sat, 22 Jul 2017 12:10:34 +0300	[thread overview]
Message-ID: <83zibw96r9.fsf@gnu.org> (raw)
In-Reply-To: <83o9slecp0.fsf@gnu.org> (message from Eli Zaretskii on Sat, 15 Jul 2017 22:12:59 +0300)

Ping!  Anything further on this?  Anything I can do to help debugging
this problem?

> Date: Sat, 15 Jul 2017 22:12:59 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: emacs-devel@gnu.org
> 
> > From: Ted Zlatanov <tzz@lifelogs.com>
> > Date: Sat, 15 Jul 2017 14:40:37 -0400
> > 
> > The size of the output is determined by the cipher's parameters. So we
> > need to know the parameters, which are in cplist.
> 
> As I wrote, the problem happens on the first iteration through the
> loop in test-gnutls-005-aead-ciphers, so the cipher's parameters
> should be known, as they are set up by the code.  But in case this
> isn't telling the whole story, you will see the values below.
> 
> > Can you capture the full parameters and memory buffers passed into the
> > GnuTLS functions?
> 
> I attach below the GDB transcript with this information.  Let me know
> if you need more data.
> 
> > Here's the sequence we expect in the test, this in a let* form:
> > 
> > 1. The IV may be actual data or it may be a list of 'iv-auto and ivsize
> > which tells extract_data_from_object() to generate a random IV (which is
> > returned as the second element by `gnutls-symmetric-encrypt').
> > 
> > 2. We call (gnutls-symmetric-encrypt cplist (copy-sequence key) iv input (copy-sequence auth))
> > 
> > 3. We need to make sure the cplist, key, iv, input, and auth make it
> > down to the GnuTLS C functions.
> > 
> > 4. We need to look at the output returned from the GnuTLS C function and
> > make sure it makes it to the return of `gnutls-symmetric-encrypt'
> > together with the actual IV used.
> > 
> > 5. We need to do the same as steps 1-4 for decryption.
> 
> That's what I did, and my observations were in the previous mail.  I
> just didn't know what to expect, so I couldn't tell whether some of
> the data was incorrect.
> 
> > If you can provide a recipe for testing your case, that would be
> > helpful.
> 
> I'm just running test-gnutls-005-aead-ciphers in an interactive
> session after loading gnutls-tests.el by hand.
> 
> Here's the GDB transcript:
> 
>   (gdb) break Fgnutls_symmetric_encrypt
>   Breakpoint 3 at 0x12aa8f5: file gnutls.c, line 2142.
>   (gdb) break Fgnutls_symmetric_decrypt
>   Breakpoint 4 at 0x12aa98b: file gnutls.c, line 2169.
>   (gdb) r -Q
> 
>   Thread 1 hit Breakpoint 3, Fgnutls_symmetric_encrypt (
>       cipher=XIL(0xc000000006c4c2a0), key=XIL(0x8000000006c336f0),
>       iv=XIL(0x8000000006c33700), input=XIL(0x8000000006c34990),
>       aead_auth=XIL(0)) at gnutls.c:2142
>   2142      return gnutls_symmetric (true, cipher, key, iv, input, aead_auth);
>   (gdb) pp cipher
>   (:cipher-id 16 :type gnutls-symmetric-cipher :cipher-aead-capable t :cipher-tagsize 16 :cipher-blocksize 16 :cipher-keysize 32 :cipher-ivsize 12)
>   (gdb) pp key
>   "                           mykey"
>   (gdb) pp iv
>   "            "
>   (gdb) pp input
>   "                "
>   (gdb) pp aead_auth
>   nil
>   (gdb) c
>   Continuing.
> 
>   Thread 1 hit Breakpoint 4, Fgnutls_symmetric_decrypt (
>       cipher=XIL(0xc000000006c4c2a0), key=XIL(0x8000000006c32fa0),
>       iv=XIL(0x8000000006c336a0), input=XIL(0x8000000006c32fb0),
>       aead_auth=XIL(0)) at gnutls.c:2169
>   2169      return gnutls_symmetric (false, cipher, key, iv, input, aead_auth);
>   (gdb) pp cipher
>   (:cipher-id 16 :type gnutls-symmetric-cipher :cipher-aead-capable t :cipher-tagsize 16 :cipher-blocksize 16 :cipher-keysize 32 :cipher-ivsize 12)
>   (gdb) pp key
>   "                           mykey"
>   (gdb) pp iv
>   "            "
>   (gdb) pp input
>   "% F[MM   ¼  t
>   E  ↑ %  >*Rº [z  "
>   (gdb) p input
>   $1 = XIL(0x8000000006c32fb0)
>   (gdb) xstring
>   $2 = (struct Lisp_String *) 0x6c32fb0
>   "%\231F[MM∩\237\212¼µ≤t\212\nEπ \030\376%τµ>*Rº╬[zו\200"
>   (gdb) p *$
>   $3 = {
>     size = 32,
>     size_byte = -1,
>     intervals = 0x0,
>     data = 0x6ce0a40 "%\231F[MM∩\237\212¼µ≤t\212\nEπ \030\376%τµ>*Rº╬[zו\200"
>   }
>   (gdb) pp aead_auth
>   nil
> 
> 



  reply	other threads:[~2017-07-22  9:10 UTC|newest]

Thread overview: 128+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-20 10:00 How to ship native modules? Elias Mårtenson
2017-02-20 15:27 ` Eli Zaretskii
2017-02-20 16:01   ` Elias Mårtenson
2017-02-20 16:30     ` Eli Zaretskii
2017-02-21  2:48       ` Elias Mårtenson
2017-02-21  3:41         ` Eli Zaretskii
2017-02-21  4:13           ` Elias Mårtenson
2017-02-21 16:48             ` Eli Zaretskii
2017-02-21 20:06               ` John Wiegley
2017-02-21 14:44       ` Stefan Monnier
     [not found]         ` <CADtN0WLjNcFRLCsJNZX+XfqOcq+veTaoGkwHQCV9bjvuQoEORA@mail.gmail.com>
2017-02-21 15:48           ` Elias Mårtenson
2017-02-21 17:14             ` Stefan Monnier
2017-02-21 16:59         ` Eli Zaretskii
2017-03-02 14:59   ` request to reconsider libnettle/libhogweed (was: How to ship native modules?) Ted Zlatanov
2017-03-02 15:19     ` request to reconsider libnettle/libhogweed Stefan Monnier
2017-03-02 15:55     ` request to reconsider libnettle/libhogweed (was: How to ship native modules?) Eli Zaretskii
2017-03-15 21:19       ` libnettle/libhogweed WIP (was: request to reconsider libnettle/libhogweed) Ted Zlatanov
2017-03-16 15:28         ` Eli Zaretskii
2017-03-17 22:46           ` libnettle/libhogweed WIP Ted Zlatanov
2017-03-18  8:12             ` Eli Zaretskii
2017-03-20 18:45           ` Ted Zlatanov
2017-04-11 20:05           ` Ted Zlatanov
2017-04-14 20:48             ` Ted Zlatanov
2017-04-15  9:32               ` Eli Zaretskii
2017-04-15 14:27                 ` Ted Zlatanov
2017-04-15 14:55                   ` Eli Zaretskii
2017-04-16  2:39                     ` Ted Zlatanov
2017-04-16  6:25                       ` Eli Zaretskii
2017-04-16  6:51                       ` Eli Zaretskii
2017-04-17 16:23                         ` Ted Zlatanov
2017-04-17 16:34                           ` Eli Zaretskii
2017-04-17 16:55                             ` Ted Zlatanov
2017-04-17 17:11                               ` Eli Zaretskii
2017-04-17 17:34                                 ` Ted Zlatanov
2017-04-17 17:46                                   ` Ted Zlatanov
2017-04-17 18:11                                   ` Eli Zaretskii
2017-04-17 20:50                               ` Ted Zlatanov
2017-04-17 21:19                                 ` Noam Postavsky
2017-04-17 23:29                                   ` Ted Zlatanov
2017-04-19  2:08                                     ` Ted Zlatanov
2017-04-19  2:42                                       ` Noam Postavsky
2017-04-19 15:24                                       ` Davis Herring
2017-04-19 15:45                                       ` Eli Zaretskii
2017-04-20 17:24                                         ` Ted Zlatanov
2017-04-20 19:38                                           ` Eli Zaretskii
2017-04-20 20:24                                             ` Ted Zlatanov
2017-04-20 20:42                                               ` Lars Ingebrigtsen
2017-04-20 21:54                                                 ` Ted Zlatanov
2017-04-21  6:21                                                   ` Eli Zaretskii
2017-04-21 18:45                                                   ` Lars Ingebrigtsen
2017-04-21 19:15                                                     ` Eli Zaretskii
2017-04-21  6:14                                               ` Eli Zaretskii
2017-05-15 21:55                                                 ` Ted Zlatanov
2017-05-16 22:19                                                   ` Ted Zlatanov
2017-05-17 16:22                                                   ` Eli Zaretskii
2017-05-17 20:05                                                     ` Ted Zlatanov
2017-05-31 18:17                                                       ` Ted Zlatanov
2017-06-03  7:23                                                         ` Eli Zaretskii
2017-06-03  9:00                                                           ` Andreas Schwab
2017-06-03 10:01                                                             ` Eli Zaretskii
2017-06-03 10:09                                                               ` Andreas Schwab
2017-06-03 10:47                                                                 ` Eli Zaretskii
2017-06-27 22:58                                                           ` Ted Zlatanov
2017-06-28 16:54                                                             ` Eli Zaretskii
2017-06-28 19:44                                                               ` Ted Zlatanov
2017-07-13 18:35                                                                 ` Ted Zlatanov
2017-07-14 15:10                                                                   ` Ted Zlatanov
2017-07-14 19:04                                                                     ` Eli Zaretskii
2017-07-14 19:43                                                                       ` Ted Zlatanov
2017-07-14 20:04                                                                         ` Eli Zaretskii
2017-07-15 18:30                                                                           ` Ted Zlatanov
2017-07-15  9:15                                                                         ` Eli Zaretskii
2017-07-15 18:40                                                                           ` Ted Zlatanov
2017-07-15 19:12                                                                             ` Eli Zaretskii
2017-07-22  9:10                                                                               ` Eli Zaretskii [this message]
2017-07-26  6:58                                                                                 ` Ted Zlatanov
2017-07-26 14:52                                                                                   ` Eli Zaretskii
2017-07-26 15:34                                                                                     ` Ted Zlatanov
2017-07-26 15:49                                                                                       ` Eli Zaretskii
2017-07-26 16:08                                                                                         ` Ted Zlatanov
2017-07-26 18:51                                                                                           ` Eli Zaretskii
2017-07-26 20:48                                                                                             ` Ted Zlatanov
2017-07-27  0:19                                                                                   ` Paul Eggert
2017-07-27  2:34                                                                                     ` Eli Zaretskii
2017-07-27  4:36                                                                                       ` Paul Eggert
2017-07-27 15:56                                                                                         ` Ted Zlatanov
2017-08-03 19:52                                                                                           ` Ted Zlatanov
2017-08-03  8:02                                                                                         ` Paul Eggert
2017-08-03 16:49                                                                                           ` Eli Zaretskii
2017-04-18 17:44                                 ` Ted Zlatanov
2017-04-19 12:22                               ` Stefan Monnier
2017-04-19 13:38                                 ` Ted Zlatanov
2017-04-19 14:16                                 ` Lars Ingebrigtsen
2017-04-19 14:48                                   ` Stefan Monnier
2017-04-19 14:41                                 ` Eli Zaretskii
2017-04-19 14:54                                   ` Stefan Monnier
2017-04-19 15:31                                     ` Eli Zaretskii
2017-04-19 15:48                                   ` Ted Zlatanov
2017-04-19 16:49                                     ` Lars Ingebrigtsen
2017-04-19 17:24                                       ` Eli Zaretskii
2017-04-19 19:53                                         ` Stefan Monnier
2017-04-20  2:30                                           ` Eli Zaretskii
2017-04-20  3:36                                             ` Stefan Monnier
2017-04-20 15:46                                               ` Eli Zaretskii
2017-04-20 15:59                                                 ` Lars Ingebrigtsen
2017-04-20 16:24                                                   ` Eli Zaretskii
2017-04-20 17:25                                                     ` Stefan Monnier
2017-04-20 19:40                                                       ` Lars Ingebrigtsen
2017-04-20 20:31                                                         ` Eli Zaretskii
2017-04-20 19:58                                                       ` Eli Zaretskii
2017-04-20 20:36                                                         ` Eli Zaretskii
2017-04-20 17:14                                                 ` Stefan Monnier
2017-04-20 19:29                                                   ` Eli Zaretskii
2017-04-19 19:49                                       ` Stefan Monnier
2017-04-17 16:00                       ` rename STRING_SET_CHARS to STRING_SET_SIZE (was: libnettle/libhogweed WIP) Ted Zlatanov
2017-04-17 16:24                         ` rename STRING_SET_CHARS to STRING_SET_SIZE Eli Zaretskii
2017-04-17 16:29                         ` Stefan Monnier
2017-04-17 16:34                           ` Ted Zlatanov
2017-04-16  3:37                     ` libnettle/libhogweed WIP Stefan Monnier
2017-04-16  6:19                       ` Eli Zaretskii
2017-04-16 13:20                         ` Stefan Monnier
2017-04-16  7:47               ` Toon Claes
2017-03-02 17:58     ` request to reconsider libnettle/libhogweed Paul Eggert
2017-03-02 18:33       ` Ted Zlatanov
2017-02-20 15:33 ` How to ship native modules? Aurélien Aptel
2017-02-21  4:50 ` Andreas Politz
2017-02-21  5:12   ` Elias Mårtenson
2017-02-21  5:23     ` Andreas Politz

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