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.
Handle KDF in ECDH_compute_key instead of requiring each implementation
support it. This modifies the compute_key method: now it allocates and
populates a buffer containing the shared secret.
Richard Levitte [Wed, 2 Mar 2016 09:57:05 +0000 (10:57 +0100)]
Don't copy from %target to %config so much, see %config as a complement
We copied $target{cflags}, $target{defines} and a few more to %config,
just to add to the entries. Avoid doing so, and let the build templates
deal with combining the two.
There are a few cases where we still fiddle with %target, but that's
acceptable.
Richard Levitte [Sat, 27 Feb 2016 15:51:34 +0000 (16:51 +0100)]
Configure - Get rid of the special thread_cflag, replace with thread_scheme
The thread_cflag setting filled a double role, as kinda sorta an
indicator of thread scheme, and as cflags. Some configs also added
lflags and ex_libs for multithreading regardless of if threading would
be enabled or not.
Instead of this, add threading cflags among in the cflag setting,
threading lflags in the lflag setting and so on if and only if threads
are enabled (which they are by default).
Also, for configs where there are no special cflags for threading (the
VMS configs are of that kind), this makes it possible to still clearly
mention what thread scheme is used.
The exact value of thread scheme is currently ignored except when it's
"(unknown)", and thereby only serves as a flag to tell if we know how
to build for multi-threading in a particular config. Yet, the
currently used values are "(unknown)", "pthreads", "uithreads" (a.k.a
solaris threads) and "winthreads".
Richard Levitte [Wed, 2 Mar 2016 18:13:26 +0000 (19:13 +0100)]
Configure - get rid of the special debug_ and release_ settings
Instead, make the build type ("debug" or "release") available through
$config{build_type} and let the configs themselves figure out what the
usual settings (such as "cflags", "lflags" and so on) should be
accordingly.
The benefit with this is that we can now have debug and release
variants of any setting, not just those Configure supports, and may
also involve other factors (the MSVC flags /MD[d] and /MT[d] involve
both build type and whether threading is enabled or not)
Richard Levitte [Sat, 27 Feb 2016 10:37:33 +0000 (11:37 +0100)]
Configure - move the addition of the zlib / libz lib to configs
Configure had the Unix centric addition of -lz when linking with zlib
is enabled, which doesn't work on other platforms. Therefore, we move
it to the BASE_unix config template and add corresponding ones in the
other BASE_* config templates. The Windows one is probably incomplete,
but that doesn't matter for the moment, as mk1mf does it's own thing
anyway.
This required making the %withargs table global, so perl snippets in
the configs can use it.
Provide getters for default_passwd_cb and userdata
This patch provides getters for default_passwd_cb and userdata for SSL
and SSL_CTX. The getter functions are required to port Python's ssl module
to OpenSSL 1.1.0.
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org>
Richard Levitte [Wed, 2 Mar 2016 08:34:26 +0000 (09:34 +0100)]
Make uplink auxiliary source separate from cpuid source
There are cases, for example when configuring no-asm, that the added
uplink source files got in the way of the cpuid ones. The best way to
solve this is to separate the two.
Instead of overriding a default operation move default operation to a
separate function which is then explicitly included in any EC_METHOD
that uses it.
At the same time remove miniscule bias in final subtraction.
Performance penalty varies from platform to platform, and even with
key length. For rsa2048 sign it was observed to be 4% for Sandy
Bridge and 7% on Broadwell.
CVE-2016-0702
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org>
Matt Caswell [Mon, 22 Feb 2016 10:27:18 +0000 (10:27 +0000)]
Fix BN_hex2bn/BN_dec2bn NULL ptr/heap corruption
In the BN_hex2bn function the number of hex digits is calculated using
an int value |i|. Later |bn_expand| is called with a value of |i * 4|.
For large values of |i| this can result in |bn_expand| not allocating any
memory because |i * 4| is negative. This leaves ret->d as NULL leading
to a subsequent NULL ptr deref. For very large values of |i|, the
calculation |i * 4| could be a positive value smaller than |i|. In this
case memory is allocated to ret->d, but it is insufficiently sized
leading to heap corruption. A similar issue exists in BN_dec2bn.
This could have security consequences if BN_hex2bn/BN_dec2bn is ever
called by user applications with very large untrusted hex/dec data. This is
anticipated to be a rare occurrence.
All OpenSSL internal usage of this function uses data that is not expected
to be untrusted, e.g. config file data or application command line
arguments. If user developed applications generate config file data based
on untrusted data then it is possible that this could also lead to security
consequences. This is also anticipated to be a rare.
Matt Caswell [Mon, 25 Jan 2016 15:28:57 +0000 (15:28 +0000)]
Refactor the async wait fd logic
Implementation experience has shown that the original plan for async wait
fds was too simplistic. Originally the async logic created a pipe internally
and user/engine code could then get access to it via API calls. It is more
flexible if the engine is able to create its own fd and provide it to the
async code.
Another issue is that there can be a lot of churn in the fd value within
the context of (say) a single SSL connection leading to continually adding
and removing fds from (say) epoll. It is better if we can provide some
stability of the fd value across a whole SSL connection. This is
problematic because an engine has no concept of an SSL connection.
This commit refactors things to introduce an ASYNC_WAIT_CTX which acts as a
proxy for an SSL connection down at the engine layer.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 23 Feb 2016 15:27:05 +0000 (15:27 +0000)]
Workaround for VisualStudio 2015 bug
VisualStudio 2015 has a bug where an internal compiler error was occurring.
By reordering the DEFINE_STACK_OF declarations for SSL_CIPHER and SSL_COMP
until after the ssl3.h include everything seems ok again.
Add a flag to EC_METHOD for curves which do not support signing.
New function EC_KEY_can_sign() returns 1 is key can be used for signing.
Return an explicit error is an attempt is made to sign with
no signing curves.
In some cases the EC_POINT and EC_KEY BIGNUM components are suboptimal
or inappropriate. Add an "custom_data" field which curves can populate with
a custom structure to suit their needs.
Extract compression form in EC_KEY_oct2key() instead of manually in the
ASN.1 code. For custom curves do not assume the initial octet is the
compression form: it isn't for X25519 et al.
Richard Levitte [Sat, 27 Feb 2016 23:20:50 +0000 (00:20 +0100)]
Make generation of dependency files more efficient when possible
When building with GNU C, clang or VMS C, it's more efficient to
generate dependency file and object file in one call rather than two.
Have the dependency output in a temporary file and compare it with the
previous one if available to see if replacement is waranted, thereby
avoiding unnecessary reconstruction of Makefile / descrip.mms.
Jeffrey Walton [Sat, 27 Feb 2016 22:08:50 +0000 (17:08 -0500)]
RT4354: Add some cross-refs
Stack Overflow has a number of questions related to mutual authentication,
the client and its certificate. Those visiting the man pages for functions
like SSL_CTX_use_certificate and SSL_CTX_load_verify_locations don't
receive the benefit of a cross reference to SSL_CTX_set_client_CA_list.
Reviewed-by: Richard Levitte <levitte@openssl.org>
- srtp_profiles variable is defined when building with SRTP, keeping
the variable usage also under ifndef OPENSSL_NO_SRTP
- alpn help option was kept under ifndef OPENSSL_NO_SRTP
Reviewed-by: Kurt Roeckx <kurt@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org>
Rich Salz [Sat, 27 Feb 2016 17:32:42 +0000 (12:32 -0500)]
Remove some old files.
I read the PROBLEMS, and they're outdated; nothing I'd put in the
online FAQ, for example. Test-builds work without using these files.
Had to remove the rehash.time stuff from Makefile.in
Reviewed-by: Richard Levitte <levitte@openssl.org>