Commit graph

567 commits

Author SHA1 Message Date
Matt Caswell
ab83e31414 Move client construction of ClientHello extensions into new framework
Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-12-08 17:18:30 +00:00
Matt Caswell
6dd083fd68 Move client parsing of ServerHello extensions into new framework
Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-12-08 17:18:25 +00:00
Matt Caswell
7da160b0f4 Move ServerHello extension construction into the new extensions framework
This lays the foundation for a later move to have the extensions built and
placed into the correct message for TLSv1.3 (e.g. ServerHello or
EncryptedExtensions).

Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-12-08 17:18:12 +00:00
Matt Caswell
6b473acabd Refactor ClientHello extension parsing
This builds on the work started in 1ab3836b3 and extends is so that
each extension has its own identified parsing functions, as well as an
allowed context identifying which messages and protocols it is relevant for.
Subsequent commits will do a similar job for the ServerHello extensions.
This will enable us to have common functions for processing extension blocks
no matter which of the multiple messages they are received from. In TLSv1.3
a number of different messages have extension blocks, and some extensions
have moved from one message to another when compared to TLSv1.2.

Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-12-08 17:17:45 +00:00
Matt Caswell
bebc0c7d85 Use the TLSv1.3 nonce construction
This updates the record layer to use the TLSv1.3 style nonce construciton.
It also updates TLSProxy and ossltest to be able to recognise the new
layout.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-29 23:31:10 +00:00
Matt Caswell
884a790e17 Fix missing NULL checks in key_share processing
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-23 22:39:27 +00:00
Matt Caswell
f5ca0b04bb Fix some style issues identified during review
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-23 15:31:22 +00:00
Matt Caswell
c805f6189e Fix SSL_IS_TLS13(s)
The SSL_IS_TLS13() macro wasn't quite right. It would come back with true
in the case where we haven't yet negotiated TLSv1.3, but it could be
negotiated.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-23 15:31:22 +00:00
Matt Caswell
92760c21e6 Update state machine to be closer to TLS1.3
This is a major overhaul of the TLSv1.3 state machine. Currently it still
looks like TLSv1.2. This commit changes things around so that it starts
to look a bit less like TLSv1.2 and bit more like TLSv1.3.

After this commit we have:

ClientHello
+ key_share          ---->
                           ServerHello
                           +key_share
                           {CertificateRequest*}
                           {Certificate*}
                           {CertificateStatus*}
                     <---- {Finished}
{Certificate*}
{CertificateVerify*}
{Finished}           ---->
[ApplicationData]    <---> [Application Data]

Key differences between this intermediate position and the final TLSv1.3
position are:
- No EncryptedExtensions message yet
- No server side CertificateVerify message yet
- CertificateStatus still exists as a separate message
- A number of the messages are still in the TLSv1.2 format
- Still running on the TLSv1.2 record layer

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-23 15:31:21 +00:00
Matt Caswell
9362c93ebc Remove old style NewSessionTicket from TLSv1.3
TLSv1.3 has a NewSessionTicket message, but it is *completely* different to
the TLSv1.2 one and may as well have been called something else. This commit
removes the old style NewSessionTicket from TLSv1.3. We will have to add the
new style one back in later.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-23 15:31:21 +00:00
Matt Caswell
9a5198808a Move getting the curvelist for client and server out of the loop
No need to continually get the list of supported curves for the client
and server. Just do it once.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
94ed2c6739 Fixed various style issues in the key_share code
Numerous style issues as well as references to TLS1_3_VERSION instead of
SSL_IS_TLS13(s)

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
323f212aa7 Check key_exchange data length is not 0
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
2ee1271d8f Ensure the whole key_share extension is well formatted
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
ef7daaf915 Validate that the provided key_share is in supported_groups
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
0f1e51ea11 Start using the key_share data to derive the PMS
The previous commits put in place the logic to exchange key_share data. We
now need to do something with that information. In <= TLSv1.2 the equivalent
of the key_share extension is the ServerKeyExchange and ClientKeyExchange
messages. With key_share those two messages are no longer necessary.

The commit removes the SKE and CKE messages from the TLSv1.3 state machine.
TLSv1.3 is completely different to TLSv1.2 in the messages that it sends
and the transitions that are allowed. Therefore, rather than extend the
existing <=TLS1.2 state transition functions, we create a whole new set for
TLSv1.3. Intially these are still based on the TLSv1.2 ones, but over time
they will be amended.

The new TLSv1.3 transitions remove SKE and CKE completely. There's also some
cleanup for some stuff which is not relevant to TLSv1.3 and is easy to
remove, e.g. the DTLS support (we're not doing DTLSv1.3 yet) and NPN.

I also disable EXTMS for TLSv1.3. Using it was causing some added
complexity, so rather than fix it I removed it, since eventually it will not
be needed anyway.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
d7c42d71ba Add processing of the key_share received in the ServerHello
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
bcec335856 Add key_share info to the ServerHello
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
b1834ad781 Add the key_share processing to the server side
At the moment the server doesn't yet do anything with this information.
We still need to send the server's key_share info back to the client. That
will happen in subsequent commits.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:46 +00:00
Matt Caswell
d2c27a28c0 Generate the key_shares extension on the client side
In this commit we just generate the extension on the client side, but don't
yet do anything with it. Subsequent commits, will add the server side
capability.

At the moment we hard code a single key_share. In the future we should make
this configurable.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-16 10:09:45 +00:00
Richard Levitte
e72040c1dc Remove heartbeat support
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1669)
2016-11-13 16:24:02 -05:00
Matt Caswell
de4d764e32 Rename the Elliptic Curves extension to supported_groups
This is a skin deep change, which simply renames most places where we talk
about curves in a TLS context to groups. This is because TLS1.3 has renamed
the extension, and it can now include DH groups too. We still only support
curves, but this rename should pave the way for a future extension for DH
groups.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-10 15:05:36 +00:00
Matt Caswell
f2342b7ac3 Address some supported_versions review comments
Added some TODOs, refactored a couple of things and added a SSL_IS_TLS13()
macro.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 16:03:09 +00:00
Matt Caswell
16bce0e08b Address some review feedback comments for supported_versions
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 16:03:08 +00:00
Matt Caswell
cd99883755 Add server side support for supported_versions extension
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 16:03:08 +00:00
Matt Caswell
b5b253b1bf Add the ability to send the supported_versions extension
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 16:03:08 +00:00
Matt Caswell
902aca09f3 Make some CLIENTHELLO_MSG function arguments const
There were a few places where they could be declared const so this commit
does that.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 09:10:30 +00:00
Matt Caswell
3d33f3bbe4 Update a comment
The name and type of the argument to ssl_check_for_safari() has changed.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 09:10:30 +00:00
Matt Caswell
6438632420 Add some function documentation and update some existing comments
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 09:10:30 +00:00
Matt Caswell
de7d61d5c2 Improve some comment documentation following the extensions refactor
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 09:10:30 +00:00
Matt Caswell
b1b4b543ee Fix various style issues in the extension parsing refactor
Based on review feedback received.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 09:10:30 +00:00
Matt Caswell
1ab3836b3b Refactor ClientHello processing so that extensions get parsed earlier
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-09 09:10:29 +00:00
Matt Caswell
348240c676 Fix misc size_t issues causing Windows warnings in 64 bit
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-04 12:09:46 +00:00
Matt Caswell
8b0e934afb Fix some missed size_t updates
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-04 12:09:45 +00:00
Matt Caswell
d736bc1a7d Update misc function params in libssl for size_t
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-04 12:09:45 +00:00
Matt Caswell
ec60ccc1c1 Convert session_id_length and sid_ctx_len to size_t
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-04 12:09:45 +00:00
Matt Caswell
582a17d662 Add the SSL_METHOD for TLSv1.3 and all other base changes required
Includes addition of the various options to s_server/s_client. Also adds
one of the new TLS1.3 ciphersuites.

This isn't "real" TLS1.3!! It's identical to TLS1.2 apart from the protocol
and the ciphersuite...and the ciphersuite is just a renamed TLS1.2 one (not
a "real" TLS1.3 ciphersuite).

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-11-02 13:08:21 +00:00
David Woodhouse
cde6145ba1 Add SSL_OP_NO_ENCRYPT_THEN_MAC
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2016-10-17 23:17:39 +01:00
Matt Caswell
a29fa98ceb Rename ssl_set_handshake_header2()
ssl_set_handshake_header2() was only ever a temporary name while we had
to have ssl_set_handshake_header() for code that hadn't been converted to
WPACKET yet. No code remains that needed that so we can rename it.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-10-02 20:25:57 +01:00
Matt Caswell
e2726ce64d Remove ssl_set_handshake_header()
Remove the old ssl_set_handshake_header() implementations. Later we will
rename ssl_set_handshake_header2() to ssl_set_handshake_header().

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-10-02 20:25:57 +01:00
Matt Caswell
42cde22f48 Remove the tls12_get_sigandhash_old() function
This is no longer needed now that all messages use WPACKET

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-10-02 20:25:57 +01:00
Matt Caswell
ac8cc3efb2 Remove tls12_copy_sigalgs_old()
This was a temporary function needed during the conversion to WPACKET. All
callers have now been converted to the new way of doing this so this
function is no longer required.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-29 14:52:55 +01:00
Matt Caswell
7facdbd66f Fix a bug in the construction of the ClienHello SRTP extension
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-29 10:06:46 +01:00
Matt Caswell
7507e73d40 Fix heartbeat compilation error
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-29 10:06:46 +01:00
Matt Caswell
8157d44b62 Convert ServerHello construction to WPACKET
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-29 10:06:46 +01:00
Matt Caswell
2f97192c78 Fix a bug in Renegotiation extension construction
The conversion to WPACKET broke the construction of the renegotiation
extension.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-28 09:15:07 +01:00
Matt Caswell
c31dbed70c Fix a mem leak in NPN handling
If a server sent multiple NPN extensions in a single ClientHello then a
mem leak can occur. This will only happen where the client has requested
NPN in the first place. It does not occur during renegotiation. Therefore
the maximum that could be leaked in a single connection with a malicious
server is 64k (the maximum size of the ServerHello extensions section). As
this is client side, only occurs if NPN has been requested and does not
occur during renegotiation this is unlikely to be exploitable.

Issue reported by Shi Lei.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-22 09:27:45 +01:00
Matt Caswell
e408c09bbf Fix OCSP Status Request extension unbounded memory growth
A malicious client can send an excessively large OCSP Status Request
extension. If that client continually requests renegotiation,
sending a large OCSP Status Request extension each time, then there will
be unbounded memory growth on the server. This will eventually lead to a
Denial Of Service attack through memory exhaustion. Servers with a
default configuration are vulnerable even if they do not support OCSP.
Builds using the "no-ocsp" build time option are not affected.

I have also checked other extensions to see if they suffer from a similar
problem but I could not find any other issues.

CVE-2016-6304

Issue reported by Shi Lei.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-22 09:27:45 +01:00
Matt Caswell
08029dfa03 Convert WPACKET_put_bytes to use convenience macros
All the other functions that take an argument for the number of bytes
use convenience macros for this purpose. We should do the same with
WPACKET_put_bytes().

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-20 14:47:44 +01:00
Matt Caswell
418a18a2de Style tweaks following review feedback
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-20 10:16:56 +01:00
Matt Caswell
6400f33818 Convert ClientVerify Construction to WPACKET
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-20 10:16:56 +01:00
Matt Caswell
dd8710dc54 Fix OCSP_RESPID processing bug introduced by WPACKET changes
An OCSP_RESPID in a status request extension has 2 bytes for the length
not 1.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-14 10:26:36 +01:00
Matt Caswell
b2b3024e0e Add a WPACKET_sub_allocate_bytes() function
Updated the construction code to use the new function. Also added some
convenience macros for WPACKET_sub_memcpy().

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-14 00:02:34 +01:00
Matt Caswell
c0f9e23c6b Fix a few style nits in the wpacket code
Addressing more feedback comments.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-13 09:41:21 +01:00
Matt Caswell
de451856f0 Address WPACKET review comments
A few style tweaks here and there. The main change is that curr and
packet_len are now offsets into the buffer to account for the fact that
the pointers can change if the buffer grows. Also dropped support for the
WPACKET_set_packet_len() function. I thought that was going to be needed
but so far it hasn't been. It doesn't really work any more due to the
offsets change.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-13 09:41:21 +01:00
Matt Caswell
fb790f1673 Add WPACKET_sub_memcpy() function
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-13 09:41:21 +01:00
Matt Caswell
0217dd19c0 Move from explicit sub-packets to implicit ones
No need to declare an explicit sub-packet. Just start one.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-13 09:41:21 +01:00
Matt Caswell
ae2f7b37da Rename PACKETW to WPACKET
To avoid confusion with the read PACKET structure.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-13 09:41:21 +01:00
Matt Caswell
2c7b4dbc1a Convert tls_construct_client_hello() to use PACKETW
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-09-13 09:41:21 +01:00
Dr. Stephen Henson
e97763c92c Sanity check ticket length.
If a ticket callback changes the HMAC digest to SHA512 the existing
sanity checks are not sufficient and an attacker could perform a DoS
attack with a malformed ticket. Add additional checks based on
HMAC size.

Thanks to Shi Lei for reporting this bug.

CVE-2016-6302

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2016-08-23 23:16:24 +01:00
Emilia Kasper
a230b26e09 Indent ssl/
Run util/openssl-format-source on ssl/

Some comments and hand-formatted tables were fixed up
manually by disabling auto-formatting.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-08-18 14:02:29 +02:00
Dr. Stephen Henson
ec24630ae2 Modify TLS support for new X25519 API.
When handling ECDH check to see if the curve is "custom" (X25519 is
currently the only curve of this type) and instead of setting a curve
NID just allocate a key of appropriate type.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-08-13 14:11:05 +01:00
Emilia Kasper
70c22888c1 Fix two bugs in clienthello processing
- Always process ALPN (previously there was an early return in the
  certificate status handling)
- Don't send a duplicate alert. Previously, both
  ssl_check_clienthello_tlsext_late and its caller would send an
  alert. Consolidate alert sending code in the caller.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-07-19 14:18:03 +02:00
FdaSilvaYY
9d22666eb8 Spelling
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1264)
2016-06-29 09:56:39 -04:00
FdaSilvaYY
f430ba31ac Spelling... and more spelling
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1245)
2016-06-22 00:26:10 +02:00
FdaSilvaYY
823146d65f Useless header include of openssl/rand.h
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1168)
2016-06-18 16:30:24 -04:00
Matt Caswell
e7653f3bab Fix comment
Fix a comment following commit c2c49969e2.

RT2388

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-06-14 10:41:00 +01:00
Todd Short
5c753de668 Fix session ticket and SNI
When session tickets are used, it's possible that SNI might swtich the
SSL_CTX on an SSL. Normally, this is not a problem, because the
initial_ctx/session_ctx are used for all session ticket/id processes.

However, when the SNI callback occurs, it's possible that the callback
may update the options in the SSL from the SSL_CTX, and this could
cause SSL_OP_NO_TICKET to be set. If this occurs, then two bad things
can happen:

1. The session ticket TLSEXT may not be written when the ticket expected
flag is set. The state machine transistions to writing the ticket, and
the client responds with an error as its not expecting a ticket.
2. When creating the session ticket, if the ticket key cb returns 0
the crypto/hmac contexts are not initialized, and the code crashes when
trying to encrypt the session ticket.

To fix 1, if the ticket TLSEXT is not written out, clear the expected
ticket flag.
To fix 2, consider a return of 0 from the ticket key cb a recoverable
error, and write a 0 length ticket and continue. The client-side code
can explicitly handle this case.

Fix these two cases, and add unit test code to validate ticket behavior.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1098)
2016-06-09 13:07:51 -04:00
Dr. Stephen Henson
77ab2b0193 remove encrypt then mac ifdefs
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-05-23 19:15:20 +01:00
Rich Salz
846e33c729 Copyright consolidation 01/10
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2016-05-17 14:19:19 -04:00
TJ Saunders
05df5c2036 Use AES256 for the default encryption algoritm for TLS session tickets
This involves providing more session ticket key data, for both the cipher and
the digest

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>

GH: #515, MR: #2153
2016-05-16 20:43:06 +02:00
TJ Saunders
4e2e1ec9d5 session tickets: Use sizeof() for the various fields
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>

GH: #515, MR: #2153
2016-05-16 20:42:21 +02:00
Kazuki Yamaguchi
b04f947941 Fix NPN protocol name list validation
Since 50932c4 "PACKETise ServerHello processing",
ssl_next_proto_validate() incorrectly allows empty protocol name.
draft-agl-tls-nextprotoneg-04[1] says "Implementations MUST ensure that
the empty string is not included and that no byte strings are
truncated."
This patch restores the old correct behavior.

[1] https://tools.ietf.org/html/draft-agl-tls-nextprotoneg-04

Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2016-05-16 11:45:25 +01:00
David Benjamin
f7aa318552 Don't send signature algorithms when client_version is below TLS 1.2.
Per RFC 5246,

    Note: this extension is not meaningful for TLS versions prior to 1.2.
    Clients MUST NOT offer it if they are offering prior versions.
    However, even if clients do offer it, the rules specified in [TLSEXT]
    require servers to ignore extensions they do not understand.

Although second sentence would suggest that there would be no interop
problems in always offering the extension, WebRTC has reported issues
with Bouncy Castle on < TLS 1.2 ClientHellos that still include
signature_algorithms. See also
https://bugs.chromium.org/p/webrtc/issues/detail?id=4223

RT#4390

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Stephen Henson <steve@openssl.org>
2016-05-09 17:46:23 +01:00
FdaSilvaYY
8483a003bf various spelling fixes
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/952)
2016-04-28 14:22:26 -04:00
Matt Caswell
5951e840d9 Fix no-ocsp on Windows (and probably VMS)
The ocsp.h file did not have appropriate guards causing link failures on
Windows.

GH Issue 900

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-04-21 17:03:02 +01:00
Rich Salz
9021a5dfb3 Rename some lowercase API's
Make OBJ_name_cmp internal
Rename idea_xxx to IDEA_xxx
Rename get_rfc_xxx to BN_get_rfc_xxx
Rename v3_addr and v3_asid functions to X509v3_...

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-04-18 08:22:00 -04:00
Matt Caswell
0aeddcfa61 Make DH opaque
Move the dh_st structure into an internal header file and provide
relevant accessors for the internal fields.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-04-09 10:10:55 +01:00
Matt Caswell
3e41ac3528 Fix no-ocsp
Misc fixes for no-ocsp

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-04-06 14:57:45 +01:00
Rich Salz
e771eea6d8 Revert "various spelling fixes"
This reverts commit 620d540bd4.
It wasn't reviewed.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-04-04 16:11:43 -04:00
FdaSilvaYY
620d540bd4 various spelling fixes
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-04-04 15:06:32 -04:00
Todd Short
0351baae36 Fix ALPN - more fixes
* Clear proposed, along with selected, before looking at ClientHello
* Add test case for above
* Clear NPN seen after selecting ALPN on server
* Minor documentation updates

Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-03-20 21:09:32 -04:00
Rich Salz
3c27208fab Remove #error from include files.
Don't have #error statements in header files, but instead wrap
the contents of that file in #ifndef OPENSSL_NO_xxx
This means it is now always safe to include the header file.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-03-20 19:48:36 -04:00
Matt Caswell
d1247df266 Ensure that memory allocated for the ticket is freed
If a call to EVP_DecryptUpdate fails then a memory leak could occur.
Ensure that the memory is freed appropriately.

Issue reported by Guido Vranken.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-03-18 11:52:22 +00:00
Kurt Roeckx
3eb2aff401 Add support for minimum and maximum protocol version supported by a cipher
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>

MR: #1595
2016-03-09 19:10:28 +01:00
Todd Short
817cd0d52f GH787: Fix ALPN
* Perform ALPN after the SNI callback; the SSL_CTX may change due to
  that processing
* Add flags to indicate that we actually sent ALPN, to properly error
  out if unexpectedly received.
* clean up ssl3_free() no need to explicitly clear when doing memset
* document ALPN functions

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
2016-03-08 09:03:05 -05:00
Rob Percival
ed29e82ade Adds CT validation to SSL connections
Disabled by default, but can be enabled by setting the
ct_validation_callback on a SSL or SSL_CTX.

Reviewed-by: Ben Laurie <ben@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-03-04 10:50:10 -05:00
Rich Salz
ddb4c0477a Changes to DEFAULT curves
Change the ECC default curve list to be this, in order: x25519, secp256r1,
secp521r1, secp384r1, brainpoolP256r1, brainpoolP384r1, and brainpool512r1.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2016-03-04 09:50:49 -05:00
Emilia Kasper
062178678f Refactor ClientHello extension parsing
1) Simplify code with better PACKET methods.

2) Make broken SNI parsing explicit. SNI was intended to be extensible
to new name types but RFC 4366 defined the syntax inextensibly, and
OpenSSL has never parsed SNI in a way that would allow adding a new name
type. RFC 6066 fixed the definition but due to broken implementations
being widespread, it appears impossible to ever extend SNI.

3) Annotate resumption behaviour. OpenSSL doesn't currently handle all
extensions correctly upon resumption. Annotate for further clean-up.

4) Send an alert on ALPN protocol mismatch.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2016-03-03 13:53:26 +01:00
Dr. Stephen Henson
1db3107ada TLS support for X25519
Add X25519 to TLS supported curve list.
Reject attempts to configure keys which cannot be used
for signing.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
2016-02-28 22:54:54 +00:00
Emilia Kasper
aa474d1fb1 TLS: reject duplicate extensions
Adapted from BoringSSL. Added a test.

The extension parsing code is already attempting to already handle this for
some individual extensions, but it is doing so inconsistently. Duplicate
efforts in individual extension parsing will be cleaned up in a follow-up.

Reviewed-by: Stephen Henson <steve@openssl.org>
2016-02-19 17:24:44 +01:00
Rich Salz
d63a5e5e7d Remove outdated DEBUG flags.
Add -DBIO_DEBUG to --strict-warnings.
Remove comments about outdated debugging ifdef guards.
Remove md_rand ifdef guarding an assert; it doesn't seem used.
Remove the conf guards in conf_api since we use OPENSSL_assert, not assert.
For pkcs12 stuff put OPENSSL_ in front of the macro name.
Merge TLS_DEBUG into SSL_DEBUG.
Various things just turned on/off asserts, mainly for checking non-NULL
arguments, which is now removed: camellia, bn_ctx, crypto/modes.
Remove some old debug code, that basically just printed things to stderr:
  DEBUG_PRINT_UNKNOWN_CIPHERSUITES, DEBUG_ZLIB, OPENSSL_RI_DEBUG,
  RL_DEBUG, RSA_DEBUG, SCRYPT_DEBUG.
Remove OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-18 17:14:50 -05:00
Matt Caswell
35b1a433ed Fix memory leaks in tls_decrypt_ticket
Certain code paths in tls_decrypt_ticket could return early without first
freeing the HMAC_CTX or the EVP_CIPHER_CTX.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-18 15:21:47 +00:00
Dr. Stephen Henson
2235b7f2dd Simplify tls1_set_ec_id.
Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-16 14:01:40 +00:00
Dr. Stephen Henson
2fa2d15ac8 Use nid_list table to lookup curve IDs.
Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-16 14:01:40 +00:00
Dr. Stephen Henson
2dc1aeed3b Add explanation and warning to TLS id table.
Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-16 14:01:40 +00:00
Dr. Stephen Henson
ce0c1f2bb2 Remove static ECDH support.
Remove support for static ECDH ciphersuites. They require ECDH keys
in certificates and don't support forward secrecy.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2016-02-11 20:54:01 +00:00
Dr. Stephen Henson
221c7b55e3 Don't check self signed certificate signature security.
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-11 19:00:41 +00:00
Rich Salz
22e3dcb780 Remove TLS heartbeat, disable DTLS heartbeat
To enable heartbeats for DTLS, configure with enable-heartbeats.
Heartbeats for TLS have been completely removed.

This addresses RT 3647

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-11 12:57:26 -05:00
Emilia Kasper
b698174493 constify PACKET
PACKET contents should be read-only. To achieve this, also
- constify two user callbacks
- constify BUF_reverse.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-01 16:21:57 +01:00
Rich Salz
349807608f Remove /* foo.c */ comments
This was done by the following
        find . -name '*.[ch]' | /tmp/pl
where /tmp/pl is the following three-line script:
        print unless $. == 1 && m@/\* .*\.[ch] \*/@;
        close ARGV if eof; # Close file to reset $.

And then some hand-editing of other files.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2016-01-26 16:40:43 -05:00
Dr. Stephen Henson
3aeb934865 make EVP_PKEY opaque
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-01-20 03:24:59 +00:00
Richard Levitte
846ec07d90 Adapt all EVP_CIPHER_CTX users for it becoming opaque
Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-12 13:52:22 +01:00
Dr. Stephen Henson
4a640fb6c3 Fix declarations and constification for inline stack.
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-01-07 18:00:51 +00:00
Viktor Dukhovni
4fa52141b0 Protocol version selection and negotiation rewrite
The protocol selection code is now consolidated in a few consecutive
short functions in a single file and is table driven.  Protocol-specific
constraints that influence negotiation are moved into the flags
field of the method structure.  The same protocol version constraints
are now applied in all code paths.  It is now much easier to add
new protocol versions without reworking the protocol selection
logic.

In the presence of "holes" in the list of enabled client protocols
we no longer select client protocols below the hole based on a
subset of the constraints and then fail shortly after when it is
found that these don't meet the remaining constraints (suiteb, FIPS,
security level, ...).  Ideally, with the new min/max controls users
will be less likely to create "holes" in the first place.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2016-01-02 10:49:06 -05:00
Dr. Stephen Henson
8382fd3a93 Use X509_get0_pubkey where appropriate
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-12-31 18:44:46 +00:00
Dr. Stephen Henson
72245f340c Check for missing DSA parameters.
If DSA parameters are absent return -1 (for unknown) in DSA_security_bits.

If parameters are absent when a certificate is set in an SSL/SSL_CTX
structure this will reject the certificate by default. This will cause DSA
certificates which omit parameters to be rejected but that is never (?)
done in practice.

Thanks to Brian 'geeknik' Carpenter for reporting this issue.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-12-30 13:34:53 +00:00
Matt Caswell
b1931d432f Simplify calling of the OCSP callback
Move all calls of the OCSP callback into one place, rather than repeating it
in two different places.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2015-12-27 21:59:04 +00:00
Matt Caswell
80e339fd09 Ensure we don't call the OCSP callback if resuming a session
It makes no sense to call the OCSP status callback if we are resuming a
session because no certificates will be sent.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2015-12-27 21:59:04 +00:00
Matt Caswell
bb1aaab428 Fix error when server does not send CertificateStatus message
If a server sends the status_request extension then it may choose
to send the CertificateStatus message. However this is optional.
We were treating it as mandatory and the connection was failing.

Thanks to BoringSSL for reporting this issue.

RT#4120

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2015-12-27 21:59:04 +00:00
Dr. Stephen Henson
bc71f91064 Remove fixed DH ciphersuites.
Remove all fixed DH ciphersuites and associated logic.

Reviewed-by: Matt Caswell <matt@openssl.org>
2015-12-19 16:14:51 +00:00
Rich Salz
7644a9aef8 Rename some BUF_xxx to OPENSSL_xxx
Rename BUF_{strdup,strlcat,strlcpy,memdup,strndup,strnlen}
to OPENSSL_{strdup,strlcat,strlcpy,memdup,strndup,strnlen}
Add #define's for the old names.
Add CRYPTO_{memdup,strndup}, called by OPENSSL_{memdup,strndup} macros.

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-12-16 16:14:49 -05:00
Matt Caswell
330dcb09b2 Add a return value check
If the call to OBJ_find_sigid_by_algs fails to find the relevant NID then
we should set the NID to NID_undef.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-12-10 11:50:20 +00:00
Dr. Stephen Henson
e7f0d9210c Extended master secret fixes and checks.
Add new flag TLS1_FLAGS_RECEIVED_EXTMS which is set when the peer sends
the extended master secret extension.

Server now sends extms if and only if the client sent extms.

Check consistency of extms extension when resuming sessions following (where
practical) RFC7627.

Reviewed-by: Matt Caswell <matt@openssl.org>
2015-12-08 16:32:39 +00:00
Richard Levitte
bf7c68177b Adapt the rest of the source to the opaque HMAC_CTX
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-12-07 17:39:23 +01:00
Richard Levitte
fa0c23de83 Adapt HMAC to the EVP_MD_CTX changes
This change required some special treatment, as HMAC is intertwined
with EVP_MD.  For now, all local HMAC_CTX variables MUST be
initialised with HMAC_CTX_EMPTY, or whatever happens to be on the
stack will be mistaken for actual pointers to EVP_MD_CTX.  This will
change as soon as HMAC_CTX becomes opaque.

Also, since HMAC_CTX_init() can fail now, its return type changes from
void to int, and it will return 0 on failure, 1 on success.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-12-07 17:36:57 +01:00
Kurt Roeckx
fe6ef2472d Remove SSL_{CTX_}set_ecdh_auto() and always enable ECDH
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
2015-12-04 22:30:36 +01:00
Kurt Roeckx
6977e8ee4a Make SSL_{CTX}_set_tmp_ecdh() call SSL_{CTX_}set1_curves()
SSL_{CTX}_set_tmp_ecdh() allows to set 1 EC curve and then tries to use it.  On
the other hand SSL_{CTX_}set1_curves() allows you to set a list of curves, but
only when SSL_{CTX_}set_ecdh_auto() was called to turn it on.

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
2015-12-04 22:25:11 +01:00
Kurt Roeckx
6f78b9e824 Remove support for SSL_{CTX_}set_tmp_ecdh_callback().
This only gets used to set a specific curve without actually checking that the
peer supports it or not and can therefor result in handshake failures that can
be avoided by selecting a different cipher.

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
2015-12-04 22:22:31 +01:00
Dr. Stephen Henson
30c7fea496 Remove GOST special case: handled automatically now.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2015-11-30 03:49:35 +00:00
Dr. Stephen Henson
7afd231275 Use digest indices for signature algorithms.
Don't hard code EVP_sha* etc for signature algorithms: use table
indices instead. Add SHA224 and SHA512 to tables.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2015-11-30 03:49:35 +00:00
Dr. Stephen Henson
152fbc28e8 Use digest tables for defaults.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
2015-11-30 00:32:57 +00:00
Dr. Stephen Henson
6938c954b0 Remove unused cert_verify_mac code
Reviewed-by: Andy Polyakov <appro@openssl.org>
2015-11-25 18:22:12 +00:00
Dr. Stephen Henson
a0f63828e3 Use EVP_md5_sha1() to generate client verify
Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-11-24 19:18:44 +00:00
Dr. Stephen Henson
d18d31a16f Use MD5+SHA1 for default digest if appropriate.
Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-11-24 19:18:44 +00:00
Dmitry Belyavsky
e44380a990 Patch containing TLS implementation for GOST 2012
This patch contains the necessary changes to provide GOST 2012
ciphersuites in TLS. It requires the use of an external GOST 2012 engine.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-11-23 16:09:42 +00:00
Matt Caswell
5f3d93e4a3 Ensure all EVP calls have their returns checked where appropriate
There are lots of calls to EVP functions from within libssl There were
various places where we should probably check the return value but don't.
This adds these checks.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-11-20 15:47:02 +00:00
Dr. Stephen Henson
2b573382f8 Don't alow TLS v1.0 ciphersuites for SSLv3
This disables some ciphersuites which aren't supported in SSL v3:
specifically PSK ciphersuites which use SHA256 or SHA384 for the MAC.

Thanks to the Open Crypto Audit Project for identifying this issue.

Reviewed-by: Matt Caswell <matt@openssl.org>
2015-11-14 00:06:32 +00:00
Matt Caswell
6329b6092b Remove redundant check from tls1_get_curvelist
The function tls1_get_curvelist() has an explicit check to see if s->cert
is NULL or not. However the check appears *after* calling the tls1_suiteb
macro which derefs s->cert. In reality s->cert can never be NULL because
it is created in SSL_new(). If the malloc fails then the SSL_new call fails
and no SSL object is created.

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-11-09 23:07:57 +00:00
Matt Caswell
a71edf3ba2 Standardise our style for checking malloc failures
if we have a malloc |x = OPENSSL_malloc(...)| sometimes we check |x|
for NULL and sometimes we treat it as a boolean |if(!x) ...|. Standardise
the approach in libssl.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2015-11-09 22:48:41 +00:00
Dr. Stephen Henson
90d9e49a4b Use uint32_t and int32_t for SSL_CIPHER structure.
Reviewed-by: Andy Polyakov <appro@openssl.org>
2015-11-08 14:03:50 +00:00
Matt Caswell
267b7789f8 Remove a trivially true OPENSSL_assert
This OPENSSL_assert in (d)tls1_hearbeat is trivially always going to be
true because it is testing the sum of values that have been set as
constants just a few lines above and nothing has changed them. Therefore
remove this.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-11-02 14:29:37 +00:00
Matt Caswell
024f543c15 Move in_handshake into STATEM
The SSL variable |in_handshake| seems misplaced. It would be better to have
it in the STATEM structure.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-10-30 08:39:47 +00:00
Alessandro Ghedini
070c23325a Remove useless code
RT#4081

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-10-23 19:52:08 +02:00
Matt Caswell
68a1662851 Don't advance PACKET in ssl_check_for_safari
The function ssl_check_for_safari fingerprints the incoming extensions
to see whether it is one of the broken versions of safari. However it was
failing to reset the PACKET back to the same position it started in, hence
causing some extensions to be skipped incorrectly.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-10-07 16:17:52 +01:00
Alessandro Ghedini
52a48f9eed Validate ClientHello extension field length
RT#4069

Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-10-05 19:43:00 +01:00
Emilia Kasper
b3e2272c59 ssl3_get_client_hello: rearrange logic
Move all packet parsing to the beginning of the method. This limits the
SSLv2 compatibility soup to the parsing, and makes the rest of the
processing uniform.

This is also needed for simpler EMS support: EMS servers need to do an
early scan for EMS to make resumption decisions. This'll be easier when
the entire ClientHello is parsed in the beginning.

As a side effect,
1) PACKETize ssl_get_prev_session and tls1_process_ticket; and
2) Delete dead code for SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG.

Reviewed-by: Matt Caswell <matt@openssl.org>
2015-10-05 19:03:52 +02:00
Emilia Kasper
4bd16463b8 Remove PACKET_(get|goto)_bookmark
The bookmark API results in a lot of boilerplate error checking that can
be much more easily achieved with a simple struct copy. It also lays the
path for removing the third PACKET field.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-09-17 18:47:33 +02:00
Matt Caswell
50932c4af2 PACKETise ServerHello processing
Process ServerHello messages using the PACKET API

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-09-07 10:45:38 +01:00
Matt Caswell
c83eda8c22 Fix session tickets
Commit 9ceb2426b0 (PACKETise ClientHello) broke session tickets by failing
to detect the session ticket extension in an incoming ClientHello. This
commit fixes the bug.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-08-14 17:00:11 +01:00
Matt Caswell
bc6616a434 Enhance PACKET readability
Enhance the PACKET code readability, and fix a stale comment. Thanks
to Ben Kaduk (bkaduk@akamai.com) for pointing this out.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-08-13 20:34:51 +01:00
Rich Salz
fbfcb22439 RT3999: Remove sub-component version strings
Especially since after the #ifdef cleanups this is not useful.

Reviewed-by: Matt Caswell <matt@openssl.org>
2015-08-10 12:13:32 -04:00
Matt Caswell
9ceb2426b0 PACKETise ClientHello processing
Uses the new PACKET code to process the incoming ClientHello including all
extensions etc.

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-08-03 11:01:42 +01:00
Dr. Stephen Henson
adc5506adf Make auto DH work with DHEPSK
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-07-30 14:43:35 +01:00
Dr. Stephen Henson
13be69f3e6 Check for kECDH with extensions.
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-07-30 14:43:35 +01:00
Dr. Stephen Henson
fe5eef3a3b Disable all PSK if no callback.
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-07-30 14:43:35 +01:00
Dr. Stephen Henson
431f458dfc Allow any order for signature algorithm string.
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-07-28 16:56:04 +01:00
Dr. Stephen Henson
f7d5348710 Use uint32_t consistently for flags.
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-07-18 13:57:05 +01:00
Adam Langley
1ae3fdbe6a Allow a zero length extension block
It is valid for an extension block to be present in a ClientHello, but to
be of zero length.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-06-12 15:40:33 +01:00
Matt Caswell
54e3ad003b Tighten extension handling
This adds additional checks to the processing of extensions in a ClientHello
to ensure that either no extensions are present, or if they are then they
take up the exact amount of space expected.

With thanks to the Open Crypto Audit Project for reporting this issue.

Reviewed-by: Stephen Henson <steve@openssl.org>
2015-06-10 10:09:57 +01:00
Kurt Roeckx
3c06513f38 Allow all curves when the client doesn't send an supported elliptic curves extension
At least in the case of SSLv3 we can't send an extention.

Reviewed-by: Matt Caswell <matt@openssl.org>
MR #811
2015-06-04 20:48:52 +02:00
Matt Caswell
9c89d29083 Don't check for a negative SRP extension size
The size of the SRP extension can never be negative (the variable
|size| is unsigned). Therefore don't check if it is less than zero.

RT#3862

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-05-26 10:35:29 +01:00
Matt Caswell
e481f9b90b Remove support for OPENSSL_NO_TLSEXT
Given the pervasive nature of TLS extensions it is inadvisable to run
OpenSSL without support for them. It also means that maintaining
the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably
not well tested). Therefore it is being removed.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-05-22 23:10:51 +01:00
Emilia Kasper
de57d23729 Only support >= 256-bit elliptic curves with ecdh_auto (server) or by default (client).
Also reorder preferences to prefer prime curves to binary curves, and P-256 to everything else.

The result:

$ openssl s_server -named_curves "auto"

This command will negotiate an ECDHE ciphersuite with P-256:

$ openssl s_client

This command will negotiate P-384:

$ openssl s_client -curves "P-384"

This command will not negotiate ECDHE because P-224 is disabled with "auto":

$ openssl s_client -curves "P-224"

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-20 15:47:51 +02:00
Dr. Stephen Henson
4d69f9e69d move masks out of CERT structure
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-19 14:05:29 +01:00
Dr. Stephen Henson
6383d31645 Move certificate validity flags out of CERT.
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-18 18:49:13 +01:00
Dr. Stephen Henson
d376e57d68 Move signing digest out of CERT.
Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-18 18:49:13 +01:00
Dr. Stephen Henson
76106e60a8 CERT tidy
Move per-connection state out of the CERT structure: which should just be
for shared configuration data (e.g. certificates to use).

In particular move temporary premaster secret, raw ciphers, peer signature
algorithms and shared signature algorithms.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-18 18:49:13 +01:00
Matt Caswell
a3680c8f9c Version negotiation rewrite cleanup
Following the version negotiation rewrite all of the previous code that was
dedicated to version negotiation can now be deleted - all six source files
of it!!

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2015-05-16 09:20:38 +01:00
Matt Caswell
55a9a16f1c Remove Kerberos support from libssl
Remove RFC2712 Kerberos support from libssl. This code and the associated
standard is no longer considered fit-for-purpose.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-13 15:07:57 +01:00
Rich Salz
86885c2895 Use "==0" instead of "!strcmp" etc
For the various string-compare routines (strcmp, strcasecmp, str.*cmp)
use "strcmp()==0" instead of "!strcmp()"

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-05-06 22:37:53 -04:00
Gunnar Kudrjavets
4c9b0a0314 Initialize potentially uninitialized local variables
Compiling OpenSSL code with MSVC and /W4 results in a number of warnings.
One category of warnings is particularly interesting - C4701 (potentially
uninitialized local variable 'name' used). This warning pretty much means
that there's a code path which results in uninitialized variables being used
or returned. Depending on compiler, its options, OS, values in registers
and/or stack, the results can be nondeterministic. Cases like this are very
hard to debug so it's rational to fix these issues.

This patch contains a set of trivial fixes for all the C4701 warnings (just
initializing variables to 0 or NULL or appropriate error code) to make sure
that deterministic values will be returned from all the execution paths.

RT#3835

Signed-off-by: Matt Caswell <matt@openssl.org>

Matt's note: All of these appear to be bogus warnings, i.e. there isn't
actually a code path where an unitialised variable could be used - its just
that the compiler hasn't been able to figure that out from the logic. So
this commit is just about silencing spurious warnings.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-06 13:06:46 +01:00
Dr. Stephen Henson
b6eb9827a6 Add OSSL_NELEM macro.
Add OSSL_NELEM macro to e_os.h to determine the number of elements in an
array.

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-05-03 12:53:08 +01:00
Rich Salz
b548a1f11c free null cleanup finale
Don't check for NULL before calling OPENSSL_free

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-05-01 10:02:07 -04:00
Rich Salz
222561fe8e free NULL cleanup 5a
Don't check for NULL before calling a free routine.  This gets X509_.*free:
    x509_name_ex_free X509_policy_tree_free X509_VERIFY_PARAM_free
    X509_STORE_free X509_STORE_CTX_free X509_PKEY_free
    X509_OBJECT_free_contents X509_LOOKUP_free X509_INFO_free

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-04-30 17:33:59 -04:00
Viktor Dukhovni
61986d32f3 Code style: space after 'if'
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-04-16 13:44:59 -04:00
Matt Caswell
2c60ed0452 Removed dependency on rrec from heartbeat processing
Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-03-26 15:02:00 +00:00
Matt Caswell
258f8721a5 Encapsulate s->s3->rrec
Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-03-26 13:53:07 +00:00
Matt Caswell
17dd65e6e1 Resolve swallowed returns codes
The recent updates to libssl to enforce stricter return code checking, left
a small number of instances behind where return codes were being swallowed
(typically because the function they were being called from was declared as
void). This commit fixes those instances to handle the return codes more
appropriately.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-03-25 18:52:13 +00:00
Matt Caswell
266483d2f5 RAND_bytes updates
Ensure RAND_bytes return value is checked correctly, and that we no longer
use RAND_pseudo_bytes.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-03-25 12:38:07 +00:00
Matt Caswell
69f6823748 Fix missing return value checks
Ensure that all functions have their return values checked where
appropriate. This covers all functions defined and called from within
libssl.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-03-23 15:23:11 +00:00
Matt Caswell
b79d24101e Don't check curves that haven't been sent
Don't check that the curve appears in the list of acceptable curves for the
peer, if they didn't send us such a list (RFC 4492 does not require that the
extension be sent).

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-03-23 14:03:39 +00:00
Dr. Stephen Henson
34e3edbf3a Fix for CVE-2015-0291
If a client renegotiates using an invalid signature algorithms extension
it will crash a server with a NULL pointer dereference.

Thanks to David Ramos of Stanford University for reporting this bug.

CVE-2015-0291

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-03-19 13:01:13 +00:00
Matt Caswell
d813f9eb38 SSL_check_chain fix
If SSL_check_chain is called with a NULL X509 object or a NULL EVP_PKEY
or the type of the public key is unrecognised then the local variable
|cpk| in tls1_check_chain does not get initialised. Subsequently an
attempt is made to deref it (after the "end" label), and a seg fault will
result.

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
2015-03-12 09:25:32 +00:00
Rich Salz
10bf4fc2c3 Merge OPENSSL_NO_EC{DH,DSA} into OPENSSL_NO_EC
Suggested by John Foley <foleyj@cisco.com>.

Reviewed-by: Matt Caswell <matt@openssl.org>
2015-03-11 09:29:37 -04:00
Rich Salz
9e9858d1cf dead code cleanup: #if 0 in ssl
I left many "#if 0" lines, usually because I thought we would
probably want to revisit them later, or because they provided
some useful internal documentation tips.

Reviewed-by: Andy Polyakov <appro@openssl.org>
2015-02-06 10:52:12 -05:00
Dr. Stephen Henson
ddc06b3556 Extended master secret extension support.
Add and retrieve extended master secret extension, setting the flag
SSL_SESS_FLAG_EXTMS appropriately.

Note: this just sets the flag and doesn't include the changes to
master secret generation.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-02-03 14:50:07 +00:00
Rich Salz
68fd6dce73 Remove support for opaque-prf
An expired IETF Internet-Draft (seven years old) that nobody
implements, and probably just as good as NSA DRBG work.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-01-28 15:37:16 -05:00
Rich Salz
474e469bbd OPENSSL_NO_xxx cleanup: SHA
Remove support for SHA0 and DSS0 (they were broken), and remove
the ability to attempt to build without SHA (it didn't work).
For simplicity, remove the option of not building various SHA algorithms;
you could argue that SHA_224/256/384/512 should be kept, since they're
like crypto algorithms, but I decided to go the other way.
So these options are gone:
	GENUINE_DSA         OPENSSL_NO_SHA0
	OPENSSL_NO_SHA      OPENSSL_NO_SHA1
	OPENSSL_NO_SHA224   OPENSSL_NO_SHA256
	OPENSSL_NO_SHA384   OPENSSL_NO_SHA512

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-01-27 12:34:45 -05:00
Kurt Roeckx
2747d73c14 Fix segfault with empty fields as last in the config.
Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-01-24 14:46:50 +01:00
Matt Caswell
50e735f9e5 Re-align some comments after running the reformat script.
This should be a one off operation (subsequent invokation of the
script should not move them)

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-01-22 09:20:10 +00:00
Matt Caswell
0f113f3ee4 Run util/openssl-format-source -v -c .
Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-01-22 09:20:09 +00:00
Matt Caswell
dbd87ffc21 indent has problems with comments that are on the right hand side of a line.
Sometimes it fails to format them very well, and sometimes it corrupts them!
This commit moves some particularly problematic ones.

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-01-22 09:20:08 +00:00
Matt Caswell
e636e2acd7 Fix source where indent will not be able to cope
Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-01-22 09:20:06 +00:00
Piotr Sikora
e783bae26a Fix building with no-srtp
RT3638

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-01-05 14:17:22 +00:00
Dr. Stephen Henson
4f605ccb77 Clear existing extension state.
When parsing ClientHello clear any existing extension state from
SRP login and SRTP profile.

Thanks to Karthikeyan Bhargavan for reporting this issue.
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-01-02 22:25:52 +00:00
Cristian Rodríguez
d97ed21986 constify tls 1.2 lookup tables.
None of this should live in writable memory

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Geoff Thorpe <geoff@openssl.org>
2014-12-31 11:13:48 +01:00
Tim Hudson
1d97c84351 mark all block comments that need format preserving so that
indent will not alter them when reformatting comments

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2014-12-30 22:10:26 +00:00
Matt Caswell
af6e2d51bf Add OPENSSL_NO_ECDH guards
Reviewed-by: Emilia Käsper <emilia@openssl.org>
2014-12-16 14:13:45 +00:00
Jonas Maebe
288b4e4f8f tls1_heartbeat: check for NULL after allocating buf
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>
2014-12-10 18:35:18 +01:00
Jonas Maebe
c27dc3981c tls1_process_heartbeat: check for NULL after allocating buffer
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>
2014-12-10 18:35:18 +01:00
Dr. Stephen Henson
00b4ee7664 Remove some unnecessary OPENSSL_FIPS references
FIPS_mode() exists in all versions of OpenSSL but always returns 0 if OpenSSL is not FIPS
capable.
Reviewed-by: Tim Hudson <tjh@openssl.org>
2014-12-08 13:18:43 +00:00
Emilia Kasper
376e2ca3e3 Clarify the return values for SSL_get_shared_curve.
Reviewed-by: Matt Caswell <matt@openssl.org>
2014-12-05 18:31:21 +01:00
Emilia Kasper
740580c2b2 Add extra checks for odd-length EC curve lists.
Odd-length lists should be rejected everywhere upon parsing. Nevertheless,
be extra careful and add guards against off-by-one reads.

Also, drive-by replace inexplicable double-negation with an explicit comparison.

Reviewed-by: Matt Caswell <matt@openssl.org>
2014-12-05 16:57:58 +01:00
Emilia Kasper
33d5ba8629 Reject elliptic curve lists of odd lengths.
The Supported Elliptic Curves extension contains a vector of NamedCurves
of 2 bytes each, so the total length must be even. Accepting odd-length
lists was observed to lead to a non-exploitable one-byte out-of-bounds
read in the latest development branches (1.0.2 and master). Released
versions of OpenSSL are not affected.

Thanks to Felix Groebert of the Google Security Team for reporting this issue.

Reviewed-by: Matt Caswell <matt@openssl.org>
2014-12-05 16:32:39 +01:00
Dr. Stephen Henson
7255ca99df Fix SuiteB chain checking logic.
Reviewed-by: Matt Caswell <matt@openssl.org>
2014-11-20 22:13:05 +00:00
Emilia Kasper
e94a6c0ede Ensure SSL3_FLAGS_CCS_OK (or d1->change_cipher_spec_ok for DTLS) is reset
once the ChangeCipherSpec message is received. Previously, the server would
set the flag once at SSL3_ST_SR_CERT_VRFY and again at SSL3_ST_SR_FINISHED.
This would allow a second CCS to arrive and would corrupt the server state.

(Because the first CCS would latch the correct keys and subsequent CCS
messages would have to be encrypted, a MitM attacker cannot exploit this,
though.)

Thanks to Joeri de Ruiter for reporting this issue.

Reviewed-by: Matt Caswell <matt@openssl.org>
2014-11-20 14:57:15 +01:00
Emilia Kasper
a06cd5d056 Reset s->tlsext_ticket_expected in ssl_scan_serverhello_tlsext.
This ensures that it's zeroed even if the SSL object is reused
(as in ssltest.c). It also ensures that it applies to DTLS, too.

Reviewed-by: Matt Caswell <matt@openssl.org>
2014-11-20 14:57:15 +01:00
Dr. Stephen Henson
5a3d8eebb7 Only handle RI extension for SSLv3
Don't send or parse any extensions other than RI (which is needed
to handle secure renegotation) for SSLv3.
Reviewed-by: Matt Caswell <matt@openssl.org>
2014-11-19 15:12:08 +00:00
Dr. Stephen Henson
e469af8d05 Process signature algorithms before deciding on certificate.
The supported signature algorithms extension needs to be processed before
the certificate to use is decided and before a cipher is selected (as the
set of shared signature algorithms supported may impact the choice).
Reviewed-by: Matt Caswell <matt@openssl.org>

(cherry picked from commit 56e8dc542b)

Conflicts:
	ssl/ssl.h
	ssl/ssl_err.c
2014-11-19 14:49:12 +00:00