Add preferences for default client and server Connection ID length
to be used when Client Hello and Server Hello is missing.
Allocate buffer for AAD in packet scope to remove the need for
buffers with the size of DTLS_MAX_CID_LENGTH.
Fixes#17701.
The DTLS heuristics must lookup the cid_length from the session
when checking record lengths in dissect_dtls_heur().
Related to #17695
Signed-off-by: Stig Bjørlykke <stig@bjorlykke.org>
* Add DTLS connection ID extension based on
draft-ietf-tls-dtls-connection-id-07, excerpt:
A CID is an identifier carried in the record layer header that gives the
recipient additional information for selecting the appropriate security
association.
* Support session tracking based on connection ID, i.e. a connection ID
list is built then looked up to retrieve the session of a packet, then
the related conversation is updated with this session.
Bug: 16600
Change-Id: I050d7b5b09dad33eb39d506aca67ee839b3b7181
Reviewed-on: https://code.wireshark.org/review/37351
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
A retransmitted ChangeCipherSpec could result in resetting the cipher.
The subsequent Finished message and application data messages would
therefore fail to decrypt. In legitimate TLS sessions, there should not
be a CCS without starting a new handshake, so that remains unaffected.
To ease debugging this issue, log the packet number and add some extra
details to the debug log. Move or remove ssl_packet_from_server calls to
avoid redundant work and to keep the debug log cleaner.
Additionally, try harder to dissect handshake messages if we know for
sure that they are decrypted. This allows inspection of a broken
Finished message that had a too large fragment length.
Tested with a private capture file from Stig Bjørlykke.
Change-Id: If6f15f8b72c467ea9ef15ddcaf2c5ebe980c27c8
Reviewed-on: https://code.wireshark.org/review/36929
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Change all wireshark.org URLs to use https.
Fix some broken links while we're at it.
Change-Id: I161bf8eeca43b8027605acea666032da86f5ea1c
Reviewed-on: https://code.wireshark.org/review/34089
Reviewed-by: Guy Harris <guy@alum.mit.edu>
The title of a decode_as_t was used by the GTK UI. It's no
longer required for Qt.
Change-Id: Ibd9d4acbe9cad2c1af520340d04e550326a97ebe
Reviewed-on: https://code.wireshark.org/review/33557
Petri-Dish: Martin Kaiser <wireshark@kaiser.cx>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
When decrypt_ssl3_record is called with a record length of zero, it will
pass NULL to ssl_data_set because tvb_get_ptr(..., 0) yields NULL. That
triggers a DISSECTOR_ASSERT. Fix this and add expert info while at it.
Bug: 15780
Change-Id: I727b511aa48b6e1aeb20a441d1eb9d3627a74413
Reviewed-on: https://code.wireshark.org/review/33203
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
The DTLS and TLS dissectors already share code for parsing the key log
file contents but the actual key material was stored separately. As
implementations (like GnuTLS) write the TLS and DTLS secrets to the same
file (specified by the SSLKEYLOGFILE environment variable), it seems
reasonable to combine them.
This also enables use of the pcapng Decryption Secrets Block for
decryption of DTLS traces. The dtls.keylog_file preference has become
obsolete and can no longer be used (this was not tested anyway).
A new test was added based on dtls12-aes128ccm8.pcap, the master secret
was extracted using the tls.debug_file preference.
Bug: 15252
Change-Id: Idfd52c251da966fe111dea37bc3fb143d968f744
Reviewed-on: https://code.wireshark.org/review/31577
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Make the time stamp precision a 4-bit bitfield, so, when combined with
the other bitfields, we have 32 bits. That means we put the flags at
the same structure level as the time stamp precision, so they can be
combined; that gets rid of an extra "flags." for references to the flags.
Put the two pointers next to each other, and after a multiple of 8 bytes
worth of other fields, so that there's no padding before or between them.
It's still not down to 64 bytes, which is the next lower power of 2, so
there's more work to do.
Change-Id: I6f3e9d9f6f48137bbee8f100c152d2c42adb8fbe
Reviewed-on: https://code.wireshark.org/review/31213
Petri-Dish: Guy Harris <guy@alum.mit.edu>
Tested-by: Petri Dish Buildbot
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Even if the certificate has a RSA public key, be sure to lookup the key
only if it is an actual RSA key exchange. Move the hashtable to the
secrets module to enable reuse.
Change-Id: I39010831079d3b65d5d4368ec97d02491c1615a5
Reviewed-on: https://code.wireshark.org/review/30854
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
RSA private keys can only be used for decrypting TLS sessions with a
full handshake that use the RSA key exchange. However currently the RSA
private key is always looked up even if it cannot be used (for example,
due to an (EC)DHE cipher or due to a resumed session).
Defer lookup of these private keys and make some more code conditional
on the availability of GnuTLS at compile time since future changes
switch to GnuTLS for RSA decryption.
Change-Id: I31dfd6cdfbd733818c798b1fb0e895cf5a987c5a
Reviewed-on: https://code.wireshark.org/review/30831
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
See https://tools.ietf.org/html/draft-ietf-tls-certificate-compression-03
the value is TEMPORARY registered to IANA (registered 2018-05-23, expires 2019-05-23
Change-Id: I5a91ad4f1366cd7f0fa077677f227a66591494b6
Reviewed-on: https://code.wireshark.org/review/29796
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Rename packet-ssl{,-utils}.[ch] to packet-tls{,-utils}.[ch].
Change-Id: I4732162ec131ddf0734b3dd191ccc9e48a76ce06
Reviewed-on: https://code.wireshark.org/review/29659
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Rename the "ssl" protocol to "tls" and add an "ssl" alias. Prefer "TLS"
over "SSL" in user interface text and in the documentation.
Fix the test_tls_master_secret test while we're here.
Bug: 14922
Change-Id: Iab6ba2c7c4c0f8f6dd0f6d5d90fac5e9486612f8
Reviewed-on: https://code.wireshark.org/review/29649
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Use g_strsplit/g_strfreev instead of wmem_strsplit/wmem_free because in
wmem_strutil.h the wmem_strsplit is documented not to be used with a
NULL allocator.
The wmem_free does not free the string elements in contrast to g_strfreev.
Change-Id: Ia207d5df5b8b7edd4ba77071292761ae4819fb12
Reviewed-on: https://code.wireshark.org/review/28796
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Have dissectors register with their protocol ID string in that table,
rather than having a table in epan/dissectors/packet-ssl-utils.c that
has to be updated for new protocols.
Have a table of protocol ID string prefixes, to handle the case of
protocols such as SPDY and HTTP2 drafts, where multiple protocol IDs are
used for different versions.
Change-Id: I363d04895a88e779fbbca7dc8e1f31aa1970a31a
Reviewed-on: https://code.wireshark.org/review/27836
Reviewed-by: Guy Harris <guy@alum.mit.edu>
In preparation for TLS 1.3 early data trial decryption, give the caller
of "ssl_decrypt_record" control over skipping integrity check failures.
As a side-effect, this will avoid a ssl preference from affecting DTLS.
If desired, a DTLS-specific preference can be added at a later point.
Change-Id: Ib84a127b4dab524902edeb2d335d069db0304ded
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/26473
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Draft -22 moved the server version to an extension and makes HRR look
like a SH. SH is now interpreted as TLS 1.2. Detecting TLS 1.3/HRR
requires scanning SH extensions before parsing the message, so do that.
Changes:
- Add draft 22 version identifier.
- Recognize special Server Hello magic for HRR.
- Dissect SupportedVersions for SH/HRR, rename the field to match spec.
- Recognise new Server Hello format (including legacy fields).
- Move version detection up to handshake message dissection to allow
HRR (disguised as SH) to be detected as such. DTLS does not have HRR
and fragmentation makes it harder, so use its version as usual.
- Ignore ChangeCipherSpec again for draft 22 (do not add expert info).
- Allow NST ticket_nonce to be empty.
Change-Id: I9d5f7dba173e1b5c901bf9a6917c65520ee60a2f
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/24340
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Similar to the TLS fix in v2.5.0rc0-1805-gd790c524b4, ensure that the
correct master secret is calculated when extended_master_secret is
enabled with client auth and a decrypted RSA premaster secret.
Bug: 14243
Change-Id: I3d8cecef0f0cc3ec73537053489adc2d0d45c947
Reviewed-on: https://code.wireshark.org/review/24564
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
In TLS 1.2, the "certificate_status" extension in the CH would result in
a response in the CertificateStatus handshake message. In TLS 1.3, the
response appears in a SH extension instead. Refactor the code to use
ssl_add_vector and hook it up with SH extensions dissection.
Do not stop dissection on a non-empty Responder ID list. Remove
misleading "CertificateStatus" tree item, it only covered the
"OCSPResponse" vector, now its two children (just OCSP Response Length
and the OCSP Response tree) are displayed directly.
Enable DTLS support, the spec does not forbid it and there is a user:
https://mta.openssl.org/pipermail/openssl-users/2016-August/004306.html
Tested with tls-sct.pcap (bug 13372) which now shows one tree item less
and tls13-18-cert-sct-ocsp.pcap (bug 12779) which now dissects the OCSP
response in the Certificate Extensions.
Change-Id: I2ccde84cb1e3bcb1bc47676eadc5cb542248cd92
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/23819
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Decrypted TLS records must be stored in a single SslPacketInfo or else
plaintext will go missing (in Follow SSL or when subdissectors need
reassembly). As this structure is currently keyed by the layer number
(pinfo->curr_layer_num) which is changed by call_dissector, it must be
copied and propagated before calling subdissectors.
Change-Id: Ic42ba6c0854154272058f9bf9796e06ad7f94bfd
Fixes: v2.3.0rc0-3740-ge1f84f985e ("Fix Decode As for protocols that may use tunneling.")
Bug: 13885
Reviewed-on: https://code.wireshark.org/review/23190
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
The IP address has been unused since 2.0. The port/protocol fields have
become unnecessary since 2.4 with the introduction of Decode As. Do not
require the user to specify these fields if they just want to set the
RSA key file.
In a future version, these three fields will be completely removed.
Change-Id: Iefc5a8778aa1122b76b707018c00b6ec429dc107
Reviewed-on: https://code.wireshark.org/review/22640
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Loading PEM and PKCS#11 keys was being done in static functions
in packet-ssl-utils.c. These were moved to wsutil, with prototypes
in a new <wsutil/rsa.h> header. This adds gnutls as optional
dependency to wsutil.
The RSA decryption helper was also moved and is now provided in
<wsutil/wsgcrypt.h>.
This allows more dissectors to access this functionality.
Change-Id: I6cfbbf5203f2881c82bad721747834ccd76e2033
Reviewed-on: https://code.wireshark.org/review/21941
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Dissectors that rely on pinfo structure information may have the
data overwritten if the data is tunneled. Address it by using
proto data that is based on pinfo->curr_layer_num.
Bug: 13746
Change-Id: I1c29f26a3c49f368876f0e96908705bc9c099ce1
Reviewed-on: https://code.wireshark.org/review/21559
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Michael Mann <mmann78@netscape.net>
This was inspired by using the Decode-As UI to decode Field "SSL TCP Dissector"
Value (port) XXX as YYY. "SSL Port" makes more sense as the UI name.
Change-Id: Id6398a5dc79e32bddc4f1bfcf0a468ae1364808f
Reviewed-on: https://code.wireshark.org/review/19573
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
The handshake_messages for extended master secret start at Client Hello
and end at ClientKeyExchange. Previously all handshake messages in a
record would be hashed, possibly covering those after CKE. Now it will
hash each handshake message separately.
For DTLS, the CH and HVR messages must also be ignored. Additionally,
DTLS needs special treatment to merge multiple fragments.
Bug: 13704
Change-Id: I0c8f19b4c352c0195848ded319b6991d76542720
Reviewed-on: https://code.wireshark.org/review/21625
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
This is a breaking change.
prefs_register_filename_preference hasn't been differentiating
between files to be saved and ones to be opened.
On GTK, a neutral dialog is used, so no problems there.
On Qt, a save dialog has been always used, even in dissectors that
were reading configuration files without modification.
prefs_register_filename_preference now takes an argument to indicate
whether UI could be a save dialog with a warning on overwriting
a file, or whether it's a general purpose open file dialog.
Qt now does this. Previously no warning was shown on overwriting a file,
so it may be used for opening files too without irritating the user.
This has been changed, as non-destructive reads should now use
the open dialog.
Dissectors were changed accordingly.
Change-Id: I9087fefa5ee7ca58de0775d4fe2c0fdcfa3a3018
Reviewed-on: https://code.wireshark.org/review/21086
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
It changed from an alert to a handshake message.
Change-Id: Ic24776e612a291153290543ba1ec8680d9d74264
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/20586
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Cookie format for HelloVerifyRequest inconsistent with that in
ClientHello. Changed to be consistent.
Change-Id: I79809ebc4bd4a1c5b43b44a21f58ad5b5d5a1bcf
Reviewed-on: https://code.wireshark.org/review/20544
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Refactor DigitallySigned dissection to return the length and make it
accept a version integer instead of Session pointer. Hopefully this
makes it easier to use the routine for SCT dissection in X.509 certs.
While at it, convert it to use ssl_add_vector.
Change-Id: I64afecc65ff597fda50d208d8f96ca0b97bfcbde
Reviewed-on: https://code.wireshark.org/review/20111
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Process NewSessionTicket and CertificateRequest extensions for TLS 1.3.
CertificateExtension in draft -18 is replaced by Extension in the next
draft, so anticipate for that and start decoding this extensions vector.
Rename ssl_dissect_hnd_hello_ext to reflect extended functionality.
(Certificate Extensions SCT is still not dissected though, but at least
OCSP (status_request(_v2)) is supported now.)
Change-Id: I3cae58dbde600e82598b3c2f8e29e92e38cd1db1
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/20104
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
The plaintext length is limited to 2^14, but the actual record length
(TLSCiphertext) may be larger due to expansion from compression and the
cipher (like AEAD auth tags). The wrong check led to false expert infos.
Change-Id: I3a56f1b0af05ecc1d97c4f1f0bcf35ff4d0fad42
Fixes: v2.3.0rc0-1584-gff0371e898 ("ssl,dtls: add expert info for overly large record lengths")
Reviewed-on: https://code.wireshark.org/review/20099
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Jaap Keuter <jaap.keuter@xs4all.nl>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Removed all guards for HAVE_LIBGCRYPT, change autotools and CMake to
error out if it is not available. Update release notes, developer
documentation and README with the new status. Clarify relation with
GnuTLS in macosx-setup.sh. Install Libgcrypt via brew script.
Motivation for this change is that many dissectors depend on Libgcrypt
and having it optional increases the maintenance burden (there have been
several compile issues in the past due to the optional status).
Furthermore, wsutil has crypto code that can be replaced by Libgcrypt.
Change-Id: Idf0021b8c4cd5db70b8766f7dcc2a8b3acbf042f
Link: https://www.wireshark.org/lists/wireshark-dev/201702/msg00011.html
Reviewed-on: https://code.wireshark.org/review/20030
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Actual decryption support will be added later.
Ping-Bug: 12779
Change-Id: I3ff1f243fd0bd1467e84d8a6a5433c1fe71bbebf
Reviewed-on: https://code.wireshark.org/review/20012
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
This also introduces a new macro, "G_MAXUINT24" as symbol for 2^24-1
(this name does not exist in GLib and uncommon in Google).
Change-Id: If000f41f6286161e3a7697357fc33ae16c1e11db
Reviewed-on: https://code.wireshark.org/review/20003
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Select the full message instead of just the first 12 bytes (as was the
case in previous TLS versions. No check is added since it is too much
work for little gain (it would require looking up the hash length for
the cipher suite).
Change-Id: Iea13d5abe6a7e55b04fabacfa8919a02acd8517d
Reviewed-on: https://code.wireshark.org/review/20011
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
The new ticket_age_add field resulted in a dissector exception. With
this fixed, the tls13-18-picotls-earlydata.pcap capture can now be fully
decrypted.
Also add validation for the ticket length (using ssl_add_vector).
Change-Id: I167038f682b47b2d1da020a8f241daaf7af22017
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/19992
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Merge the length parsing into the SignatureAndHashAlgorithm vector
parsing. Remove extra expert info which are replaced by the generic
ones.
Tested with a mutated pcap where the signature length field is off by
one (too large = expert error, too small = expert warning, as expected).
Change-Id: I43350352ae00eb42bbe5c2ee81289fb592b88f86
Reviewed-on: https://code.wireshark.org/review/19933
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Being able to override (set) the application data dissector without
hacks (RSA keys dialog) would be nice. Modelled after
v2.3.0rc0-481-gafa2605e43 ("Support Decode As for {SSL,TLS}-over-TCP.")
Change-Id: Ic4c5ca55e8f20ad599c41c1df58b24f3bced2281
Reviewed-on: https://code.wireshark.org/review/19869
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
"decoder->flow" could result in a NULL pointer dereference if a null
cipher was in use (caught by Clang static analyzer).
Answering the questions:
- DTLS records fragments do not need to be reassembled, thus there is no
flow. The Handshake messages have their own fragment_offset field and
thus there is no need to maintain an extra flow.
- Actually one datagram can contain multiple records (RFC 6347, 4.1.1),
but this is not implemented yet. The key can however not be "0"
though, it must match the offsets from ssl_get_record_info.
Fixes: v2.3.0rc0-2152-g77404250d5 ("(D)TLS: consolidate and simplify decrypted records handling")
Change-Id: Iac367a68a2936559cd5d557f877c5598114cadca
Reviewed-on: https://code.wireshark.org/review/19892
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
See https://tools.ietf.org/html/draft-ietf-tls-tls13-18#section-4.3.1
Change-Id: I35e049d991be4c242ef2b84db3a322c6a13d2f96
Ping-Bug: 12779
Reviewed-on: https://code.wireshark.org/review/19860
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
The current ssl_decrypt_record is hard to understand due to mixing CBC
concepts (MAC, padding) with AEAD. Extract the AEAD functionality and
use better variable naming.
The "Plaintext" debug print now includes just the plaintext (the auth
tag is stripped). A write_iv.data_len check is added just to be sure and
more prep work is done for auth tag validation and TLS 1.3 support.
Tested against the (D)TLS AEAD tests on Libgcrypt 1.4.5 (CentOS 6),
1.6.5 (Ubuntu 14.04), 1.7.6 (Arch Linux). Compile-tested w/o Libgcrypt.
Change-Id: I94dd2fd70e1281d85c954abfe523f7483d9ac68b
Reviewed-on: https://code.wireshark.org/review/19852
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Also unconditionally show the encrypted appdata record, matching the SSL
dissector. Now the bytes are always linked to a field.
Change-Id: Ie65cd5fc6620d53da46a94cdb1972863702b452c
Reviewed-on: https://code.wireshark.org/review/19868
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Stig Bjørlykke