Nicola Tuveri [Sat, 7 Sep 2019 15:05:31 +0000 (18:05 +0300)]
[ec] Match built-in curves on EC_GROUP_new_from_ecparameters
Description
-----------
Upon `EC_GROUP_new_from_ecparameters()` check if the parameters match any
of the built-in curves. If that is the case, return a new
`EC_GROUP_new_by_curve_name()` object instead of the explicit parameters
`EC_GROUP`.
This affects all users of `EC_GROUP_new_from_ecparameters()`:
- direct calls to `EC_GROUP_new_from_ecparameters()`
- direct calls to `EC_GROUP_new_from_ecpkparameters()` with an explicit
parameters argument
- ASN.1 parsing of explicit parameters keys (as it eventually
ends up calling `EC_GROUP_new_from_ecpkparameters()`)
A parsed explicit parameter key will still be marked with the
`OPENSSL_EC_EXPLICIT_CURVE` ASN.1 flag on load, so, unless
programmatically forced otherwise, if the key is eventually serialized
the output will still be encoded with explicit parameters, even if
internally it is treated as a named curve `EC_GROUP`.
Before this change, creating any `EC_GROUP` object using
`EC_GROUP_new_from_ecparameters()`, yielded an object associated with
the default generic `EC_METHOD`, but this was never guaranteed in the
documentation.
After this commit, users of the library that intentionally want to
create an `EC_GROUP` object using a specific `EC_METHOD` can still
explicitly call `EC_GROUP_new(foo_method)` and then manually set the
curve parameters using `EC_GROUP_set_*()`.
Motivation
----------
This has obvious performance benefits for the built-in curves with
specialized `EC_METHOD`s and subtle but important security benefits:
- the specialized methods have better security hardening than the
generic implementations
- optional fields in the parameter encoding, like the `cofactor`, cannot
be leveraged by an attacker to force execution of the less secure
code-paths for single point scalar multiplication
- in general, this leads to reducing the attack surface
Check the manuscript at https://arxiv.org/abs/1909.01785 for an in depth
analysis of the issues related to this commit.
It should be noted that `libssl` does not allow to negotiate explicit
parameters (as per RFC 8422), so it is not directly affected by the
consequences of using explicit parameters that this commit fixes.
On the other hand, we detected external applications and users in the
wild that use explicit parameters by default (and sometimes using 0 as
the cofactor value, which is technically not a valid value per the
specification, but is tolerated by parsers for wider compatibility given
that the field is optional).
These external users of `libcrypto` are exposed to these vulnerabilities
and their security will benefit from this commit.
Related commits
---------------
While this commit is beneficial for users using built-in curves and
explicit parameters encoding for serialized keys, commit
b783beeadf6b80bc431e6f3230b5d5585c87ef87 (and its equivalents for the
1.0.2, 1.1.0 and 1.1.1 stable branches) fixes the consequences of the
invalid cofactor values more in general also for other curves
(CVE-2019-1547).
The following list covers commits in `master` that are related to the
vulnerabilities presented in the manuscript motivating this commit:
-
d2baf88c43 [crypto/rsa] Set the constant-time flag in multi-prime RSA too
-
311e903d84 [crypto/asn1] Fix multiple SCA vulnerabilities during RSA key validation.
-
b783beeadf [crypto/ec] for ECC parameters with NULL or zero cofactor, compute it
-
724339ff44 Fix SCA vulnerability when using PVK and MSBLOB key formats
Note that the PRs that contributed the listed commits also include other
commits providing related testing and documentation, in addition to
links to PRs and commits backporting the fixes to the 1.0.2, 1.1.0 and
1.1.1 branches.
This commit includes a partial backport of
https://github.com/openssl/openssl/pull/8555
(commit
8402cd5f75f8c2f60d8bd39775b24b03dd8b3b38)
for which the main author is Shane Lontis.
Responsible Disclosure
----------------------
This and the other issues presented in https://arxiv.org/abs/1909.01785
were reported by Cesar Pereida GarcĂa, Sohaib ul Hassan, Nicola Tuveri,
Iaroslav Gridin, Alejandro Cabrera Aldaya and Billy Bob Brumley from the
NISEC group at Tampere University, FINLAND.
The OpenSSL Security Team evaluated the security risk for this
vulnerability as low, and encouraged to propose fixes using public Pull
Requests.
_______________________________________________________________________________
Co-authored-by: Shane Lontis <shane.lontis@oracle.com>
(Backport from https://github.com/openssl/openssl/pull/9808)
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9810)
Dr. Matthias St. Pierre [Tue, 23 Jul 2019 18:54:03 +0000 (20:54 +0200)]
Configure: clang: add -Wno-unknown-warning-option
Fixes travis build errors due to clang
error: unknown warning option '-Wno-extended-offsetof'
It seems like '-Wextended-offsetof' was removed from clang in version 6.0.0,
(see [1], [2]). While gcc ignores unknown options of the type '-Wno-xxx',
clang by default issues a warning [-Wunknown-warning-option] (see [3]), which
together with '-Werror' causes the build to fail.
This commit adds the '-Wno-unknown-warning-option' option to make clang
behave more relaxed like gcc.
[1] https://reviews.llvm.org/D40267
[2] https://github.com/llvm/llvm-project/commit/
52a3ca9e2909
[3] https://clang.llvm.org/docs/DiagnosticsReference.html#wunknown-warning-option
[extended tests]
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9804)
Billy Brumley [Fri, 6 Sep 2019 17:11:32 +0000 (20:11 +0300)]
[test/recipes/30-test_evp_data] computing ECC cofactors: regression test
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9795)
Billy Brumley [Fri, 6 Sep 2019 16:34:53 +0000 (19:34 +0300)]
[crypto/ec] for ECC parameters with NULL or zero cofactor, compute it
The cofactor argument to EC_GROUP_set_generator is optional, and SCA
mitigations for ECC currently use it. So the library currently falls
back to very old SCA-vulnerable code if the cofactor is not present.
This PR allows EC_GROUP_set_generator to compute the cofactor for all
curves of cryptographic interest. Steering scalar multiplication to more
SCA-robust code.
This issue affects persisted private keys in explicit parameter form,
where the (optional) cofactor field is zero or absent.
It also affects curves not built-in to the library, but constructed
programatically with explicit parameters, then calling
EC_GROUP_set_generator with a nonsensical value (NULL, zero).
The very old scalar multiplication code is known to be vulnerable to
local uarch attacks, outside of the OpenSSL threat model. New results
suggest the code path is also vulnerable to traditional wall clock
timing attacks.
CVE-2019-1547
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9795)
Nicola Tuveri [Fri, 6 Sep 2019 11:05:26 +0000 (14:05 +0300)]
[ec/ecp_nistp*.c] restyle: use {} around `else` too
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/9511)
(cherry picked from commit
4fe2ee3a449a8ca2886584e221f34ff0ef5de119)
Nicola Tuveri [Thu, 5 Sep 2019 22:31:45 +0000 (01:31 +0300)]
[ec/ecp_nistp*.c] remove flip_endian()
Replace flip_endian() by using the little endian specific
BN_bn2lebinpad() and BN_lebin2bn().
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/9511)
(cherry picked from commit
e0b660c27d8d97b4ad9e2098cc957de26872c0ef)
Nicola Tuveri [Thu, 5 Sep 2019 21:18:36 +0000 (00:18 +0300)]
Uniform BN_bn2binpad() and BN_bn2lebinpad() implementations
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/9511)
(cherry picked from commit
1b338abe3abb8c73f004c34d4b8a9272b89dfd5d)
Nicola Tuveri [Thu, 1 Aug 2019 23:08:34 +0000 (02:08 +0300)]
Make BN_num_bits() consttime upon BN_FLG_CONSTTIME
This issue was partially addressed by commit
972c87dfc7e765bd28a4964519c362f0d3a58ca4, which hardened its callee
BN_num_bits_word() to avoid leaking the most-significant word of its
argument via branching and memory access pattern.
The commit message also reported:
> There are a few places where BN_num_bits is called on an input where
> the bit length is also secret. This does *not* fully resolve those
> cases as we still only look at the top word.
BN_num_bits() is called directly or indirectly (e.g., through
BN_num_bytes() or BN_bn2binpad() ) in various parts of the `crypto/ec`
code, notably in all the currently supported implementations of scalar
multiplication (in the generic path through ec_scalar_mul_ladder() as
well as in dedicated methods like ecp_nistp{224,256,521}.c and
ecp_nistz256.c).
Under the right conditions, a motivated SCA attacker could retrieve the
secret bitlength of a secret nonce through this vulnerability,
potentially leading, ultimately, to recover a long-term secret key.
With this commit, exclusively for BIGNUMs that are flagged with
BN_FLG_CONSTTIME, instead of accessing only bn->top, all the limbs of
the BIGNUM are accessed up to bn->dmax and bitwise masking is used to
avoid branching.
Memory access pattern still leaks bn->dmax, the size of the lazily
allocated buffer for representing the BIGNUM, which is inevitable with
the current BIGNUM architecture: reading past bn->dmax would be an
out-of-bound read.
As such, it's the caller responsibility to ensure that bn->dmax does not
leak secret information, by explicitly expanding the internal BIGNUM
buffer to a public value sufficient to avoid any lazy reallocation
while manipulating it: this should be already done at the top level
alongside setting the BN_FLG_CONSTTIME.
Thanks to David Schrammel and Samuel Weiser for reporting this issue
through responsible disclosure.
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/9511)
(cherry picked from commit
8b44198b916015f77bef1befa26edb48ad8a0238)
Nicola Tuveri [Thu, 1 Aug 2019 22:33:05 +0000 (01:33 +0300)]
Fix a SCA leak using BN_bn2bin()
BN_bn2bin() is not constant-time and leaks the number of bits in the
processed BIGNUM.
The specialized methods in ecp_nistp224.c, ecp_nistp256.c and
ecp_nistp521.c internally used BN_bn2bin() to convert scalars into the
internal fixed length representation.
This can leak during ECDSA/ECDH key generation or handling the nonce
while generating an ECDSA signature, when using these implementations.
The amount and risk of leaked information useful for a SCA attack
varies for each of the three curves, as it depends mainly on the
ratio between the bitlength of the curve subgroup order (governing the
size of the secret nonce/key) and the limb size for the internal BIGNUM
representation (which depends on the compilation target architecture).
To fix this, we replace BN_bn2bin() with BN_bn2binpad(), bounding the
output length to the width of the internal representation buffer: this
length is public.
Internally the final implementation of both BN_bn2binpad() and
BN_bn2bin() already has masking in place to avoid leaking bn->top
through memory access patterns.
Memory access pattern still leaks bn->dmax, the size of the lazily
allocated buffer for representing the BIGNUM, which is inevitable with
the current BIGNUM architecture: reading past bn->dmax would be an
out-of-bound read.
As such, it's the caller responsibility to ensure that bn->dmax does not
leak secret information, by explicitly expanding the internal BIGNUM
buffer to a public value sufficient to avoid any lazy reallocation
while manipulating it: this is already done at the top level alongside
setting the BN_FLG_CONSTTIME.
Finally, the internal implementation of BN_bn2binpad() indirectly calls
BN_num_bits() via BN_num_bytes(): the current implementation of
BN_num_bits() can leak information to a SCA attacker, and is addressed
in the next commit.
Thanks to David Schrammel and Samuel Weiser for reporting this issue
through responsible disclosure.
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/9511)
(cherry picked from commit
805315d3a20f7274195eed75b06c391dacf3b197)
Bernd Edlinger [Fri, 6 Sep 2019 06:46:46 +0000 (08:46 +0200)]
Fix a SCA leak in BN_generate_dsa_nonce
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/9782)
(cherry picked from commit
31ca19403d56ad71d823cf62990518dfc6905bb4)
Cesar Pereida Garcia [Thu, 5 Sep 2019 09:13:11 +0000 (12:13 +0300)]
[crypto/asn1] Fix multiple SCA vulnerabilities during RSA key validation.
This commit addresses multiple side-channel vulnerabilities present
during RSA key validation.
Private key parameters are re-computed using variable-time functions.
This issue was discovered and reported by the NISEC group at TAU Finland.
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9779)
(cherry picked from commit
311e903d8468e2a380d371609a10eda71de16c0e)
Cesar Pereida Garcia [Wed, 14 Aug 2019 07:17:06 +0000 (10:17 +0300)]
Fix SCA vulnerability when using PVK and MSBLOB key formats
This commit addresses a side-channel vulnerability present when
PVK and MSBLOB key formats are loaded into OpenSSL.
The public key was not computed using a constant-time exponentiation
function.
This issue was discovered and reported by the NISEC group at TAU Finland.
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9587)
(cherry picked from commit
724339ff44235149c4e8ddae614e1dda6863e23e)
Bernd Edlinger [Fri, 16 Aug 2019 13:18:51 +0000 (15:18 +0200)]
Fix error handling in X509_chain_up_ref
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/9614)
(cherry picked from commit
cae665dfa6ccec743a7f39cf80676d7d2d787e56)
Richard Levitte [Sat, 27 Jul 2019 06:40:46 +0000 (08:40 +0200)]
Makefile.shared: fix to allow strings and spaces in passed variables
The previous change for mingw, which now defaults to OPENSSLDIR and
ENGINESDIR definitions that include a space, a long standing issue was
revealed again; our builds for Unix like environment were never very
tolerant of spaces in these definitions, because the quotes were
interpreted along the way.
New analysis of Makefile.shared showed that our use of quotes in there
wasn't quite right. A lot of double quotes could safely be replaced
with single quotes, thus protecting the diverse values we pass down to
this build file (remember that make variables are expanded before
passing the command to the shell, unconditionally), reserving double
quotes to the places where absolutely needed (to protect the expansion
of shell variables to commands).
CVE-2019-1552
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9469)
Richard Levitte [Sat, 6 Jul 2019 07:38:59 +0000 (09:38 +0200)]
Fix default installation paths on mingw
Mingw config targets assumed that resulting programs and libraries are
installed in a Unix-like environment and the default installation
prefix was therefore set to '/usr/local'.
However, mingw programs are installed in a Windows environment, and
the installation directories should therefore have Windows defaults,
i.e. the same kind of defaults as the VC config targets.
A difficulty is, however, that a "cross compiled" build can't figure
out the system defaults from environment the same way it's done when
building "natively", so we have to fall back to hard coded defaults in
that case.
Tests can still be performed when cross compiled on a non-Windows
platform, since all tests only depend on the source and build
directory, and otherwise relies on normal local paths.
CVE-2019-1552
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9460)
Bernd Edlinger [Fri, 21 Jun 2019 19:26:19 +0000 (21:26 +0200)]
Add value_barriers in constant time select functions
The barriers prevent the compiler from narrowing down the
possible value range of the mask and ~mask in the select
statements, which avoids the recognition of the select
and turning it into a conditional load or branch.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9418)
Krists Krilovs [Mon, 8 Jul 2019 20:43:09 +0000 (13:43 -0700)]
Fix wrong lock claimed in x509 dir lookup.
x509 store's objects cache can get corrupted when using dir lookup
method in multithreaded application. Claim x509 store's lock when
accessing objects cache.
CLA: trivial
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9326)
Pauli [Mon, 8 Jul 2019 03:39:20 +0000 (13:39 +1000)]
Avoid NULL pointer dereference.
[manual merge from #9059 to 1.1.0]
Fixes: #9043
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/9322)
Richard Levitte [Tue, 28 May 2019 12:59:22 +0000 (14:59 +0200)]
Prepare for 1.1.0l-dev
Reviewed-by: Matt Caswell <matt@openssl.org>
Richard Levitte [Tue, 28 May 2019 12:59:16 +0000 (14:59 +0200)]
Prepare for 1.1.0k release
Reviewed-by: Matt Caswell <matt@openssl.org>
Richard Levitte [Tue, 28 May 2019 12:47:54 +0000 (14:47 +0200)]
Update copyright year
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9033)
Richard Levitte [Mon, 27 May 2019 19:34:05 +0000 (21:34 +0200)]
Add CHANGES and NEWS for 1.1.0k
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9018)
Kurt Roeckx [Sat, 13 Apr 2019 10:32:48 +0000 (12:32 +0200)]
Change default RSA, DSA and DH size to 2048 bit
Fixes: #8737
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Richard Levitte <levitte@openssl.org>
GH: #8741
(cherry picked from commit
70b0b977f73cd70e17538af3095d18e0cf59132e)
Shane Lontis [Wed, 27 Mar 2019 07:38:28 +0000 (17:38 +1000)]
fixed public range check in ec_GF2m_simple_oct2point
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/8607)
(cherry picked from commit
cad8347be23c5e0c0d9eea02d090d42daf2dd7a9)
Bernd Edlinger [Wed, 20 Mar 2019 21:02:58 +0000 (22:02 +0100)]
Modify the RSA_private_decrypt functions to check the padding in
constant time with a memory access pattern that does not depend
on secret information.
[extended tests]
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8543)
(cherry picked from commit
9c0cf214e7836eb5aaf1ea5d3cbf6720533f86b5)
Bernd Edlinger [Wed, 20 Mar 2019 19:01:12 +0000 (20:01 +0100)]
Make err_clear_constant_time really constant time
[extended tests]
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8542)
(cherry picked from commit
94dc53a3f7549040dd9e61a25485070c14b41c49)
Bernd Edlinger [Sun, 17 Mar 2019 16:28:24 +0000 (17:28 +0100)]
Clear the point S before freeing in ec_mul_consttime
The secret point R can be recovered from S using the equation R = S - P.
The X and Z coordinates should be sufficient for that.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8505)
Bernd Edlinger [Sun, 17 Mar 2019 08:48:15 +0000 (09:48 +0100)]
Clear the secret point in ecdh_simple_compute_key
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8501)
(cherry picked from commit
1ff2c992c24c330c0d40708b4169b862563d6aab)
Bernd Edlinger [Thu, 28 Feb 2019 09:08:18 +0000 (10:08 +0100)]
Fix memory overrun in rsa padding check functions
Fixes #8364 and #8357
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
(Merged from https://github.com/openssl/openssl/pull/8365)
(cherry picked from commit
d7f5e5ae6d53f1387a42d210806cf5e9ed0882d6)
Matt Caswell [Tue, 5 Mar 2019 13:26:45 +0000 (13:26 +0000)]
Avoid an underflow in ecp_nistp521.c
The function felem_diff_128_64 in ecp_nistp521.c substracts the number |in|
from |out| mod p. In order to avoid underflow it first adds 32p mod p
(which is equivalent to 0 mod p) to |out|. The comments and variable naming
suggest that the original author intended to add 64p mod p. In fact it
has been shown that with certain unusual co-ordinates it is possible to
cause an underflow in this function when only adding 32p mod p while
performing a point double operation. By changing this to 64p mod p the
underflow is avoided.
It turns out to be quite difficult to construct points that satisfy the
underflow criteria although this has been done and the underflow
demonstrated. However none of these points are actually on the curve.
Finding points that satisfy the underflow criteria and are also *on* the
curve is considered significantly more difficult. For this reason we do
not believe that this issue is currently practically exploitable and
therefore no CVE has been assigned.
This only impacts builds using the enable-ec_nistp_64_gcc_128 Configure
option.
With thanks to Bo-Yin Yang, Billy Brumley and Dr Liu for their significant
help in investigating this issue.
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/8405)
(cherry picked from commit
13fbce17fc9f02e2401fc3868f3f8e02d6647e5f)
Matt Caswell [Tue, 5 Mar 2019 14:51:07 +0000 (14:51 +0000)]
Test an overlong ChaCha20-Poly1305 nonce
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8406)
(cherry picked from commit
a4f0b50eafb256bb802f2724fc7f7580fb0fbabc)
Matt Caswell [Tue, 5 Mar 2019 14:39:15 +0000 (14:39 +0000)]
Prevent over long nonces in ChaCha20-Poly1305
ChaCha20-Poly1305 is an AEAD cipher, and requires a unique nonce input for
every encryption operation. RFC 7539 specifies that the nonce value (IV)
should be 96 bits (12 bytes). OpenSSL allows a variable nonce length and
front pads the nonce with 0 bytes if it is less than 12 bytes. However it
also incorrectly allows a nonce to be set of up to 16 bytes. In this case
only the last 12 bytes are significant and any additional leading bytes are
ignored.
It is a requirement of using this cipher that nonce values are unique.
Messages encrypted using a reused nonce value are susceptible to serious
confidentiality and integrity attacks. If an application changes the
default nonce length to be longer than 12 bytes and then makes a change to
the leading bytes of the nonce expecting the new value to be a new unique
nonce then such an application could inadvertently encrypt messages with a
reused nonce.
Additionally the ignored bytes in a long nonce are not covered by the
integrity guarantee of this cipher. Any application that relies on the
integrity of these ignored leading bytes of a long nonce may be further
affected.
Any OpenSSL internal use of this cipher, including in SSL/TLS, is safe
because no such use sets such a long nonce value. However user
applications that use this cipher directly and set a non-default nonce
length to be longer than 12 bytes may be vulnerable.
CVE-2019-1543
Fixes #8345
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8406)
(cherry picked from commit
2a3d0ee9d59156c48973592331404471aca886d6)
Matt Caswell [Wed, 20 Feb 2019 14:21:36 +0000 (14:21 +0000)]
Clarify that SSL_shutdown() must not be called after a fatal error
Follow on from CVE-2019-1559
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Thu, 13 Dec 2018 17:16:55 +0000 (17:16 +0000)]
Go into the error state if a fatal alert is sent or received
1.1.0 is not impacted by CVE-2019-1559, but this commit is a follow on
from that. That CVE was a result of applications calling SSL_shutdown
after a fatal alert has occurred. By chance 1.1.0 is not vulnerable to
that issue, but this change is additional hardening to prevent other
similar issues.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Mon, 25 Feb 2019 11:28:32 +0000 (11:28 +0000)]
Ensure bn_cmp_words can handle the case where n == 0
Thanks to David Benjamin who reported this, performed the analysis and
suggested the patch. I have incorporated some of his analysis in the
comments below.
This issue can cause an out-of-bounds read. It is believed that this was
not reachable until the recent "fixed top" changes. Analysis has so far
only identified one code path that can encounter this - although it is
possible that others may be found. The one code path only impacts 1.0.2 in
certain builds. The fuzzer found a path in RSA where iqmp is too large. If
the input is all zeros, the RSA CRT logic will multiply a padded zero by
iqmp. Two mitigating factors:
- Private keys which trip this are invalid (iqmp is not reduced mod p).
Only systems which take untrusted private keys care.
- In OpenSSL 1.1.x, there is a check which rejects the oversize iqmp,
so the bug is only reproducible in 1.0.2 so far.
Fortunately, the bug appears to be relatively harmless. The consequences of
bn_cmp_word's misbehavior are:
- OpenSSL may crash if the buffers are page-aligned and the previous page is
non-existent.
- OpenSSL will incorrectly treat two BN_ULONG buffers as not equal when they
are equal.
- Side channel concerns.
The first is indeed a concern and is a DoS bug. The second is fine in this
context. bn_cmp_word and bn_cmp_part_words are used to compute abs(a0 - a1)
in Karatsuba. If a0 = a1, it does not matter whether we use a0 - a1 or
a1 - a0. The third would be worth thinking about, but it is overshadowed
by the entire Karatsuba implementation not being constant time.
Due to the difficulty of tripping this and the low impact no CVE is felt
necessary for this issue.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8326)
(cherry picked from commit
576129cd72ae054d246221f111aabf42b9c6d76d)
Jeff Mahoney [Sun, 24 Feb 2019 08:56:28 +0000 (16:56 +0800)]
apps/speed: fix segfault while looking up algorithm name
The backport of master commit
5c6a69f539a (apps/speed: fix possible OOB
access in some EC arrays) as 1.1.0 commit
4e07941373a introduced a
regression. The ecdh_choices array is iterated using an element count
but is NULL terminated. This means that running 'openssl speed somealgo'
will result in a segfault when opt_found hits the NULL entry.
Fixes #8243
CLA: trivial
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Paul Yang <yang.yang@baishancloud.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8244)
Nicola Tuveri [Fri, 8 Feb 2019 10:42:25 +0000 (12:42 +0200)]
Clear BN_FLG_CONSTTIME on BN_CTX_get()
(cherry picked from commit
c8147d37ccaaf28c430d3fb45a14af36597e48b8)
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8294)
Nicola Tuveri [Mon, 11 Feb 2019 22:37:25 +0000 (00:37 +0200)]
Test for constant-time flag leakage in BN_CTX
This commit adds a simple unit test to make sure that the constant-time
flag does not "leak" among BN_CTX frames:
- test_ctx_consttime_flag() initializes (and later frees before
returning) a BN_CTX object, then it calls in sequence
test_ctx_set_ct_flag() and test_ctx_check_ct_flag() using the same
BN_CTX object. The process is run twice, once with a "normal"
BN_CTX_new() object, then with a BN_CTX_secure_new() one.
- test_ctx_set_ct_flag() starts a frame in the given BN_CTX and sets the
BN_FLG_CONSTTIME flag on some of the BIGNUMs obtained from the frame
before ending it.
- test_ctx_check_ct_flag() then starts a new frame and gets a number of
BIGNUMs from it. In absence of leaks, none of the BIGNUMs in the new
frame should have BN_FLG_CONSTTIME set.
In actual BN_CTX usage inside libcrypto the leak could happen at any
depth level in the BN_CTX stack, with varying results depending on the
patterns of sibling trees of nested function calls sharing the same
BN_CTX object, and the effect of unintended BN_FLG_CONSTTIME on the
called BN_* functions.
This simple unit test abstracts away this complexity and verifies that
the leak does not happen between two sibling functions sharing the same
BN_CTX object at the same level of nesting.
(manually cherry picked from commit
fe16ae5f95fa86ddb049a8d1e2caee0b80b32282)
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8294)
Nicola Tuveri [Mon, 18 Feb 2019 01:46:54 +0000 (03:46 +0200)]
[test] unit test for field_inv function pointer in EC_METHOD
This is a rewrite of commit
8f58ede09572dcc6a7e6c01280dd348240199568 for
the 1.1.0-stable branch.
Co-authored-by: Billy Brumley <bbrumley@gmail.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8263)
Billy Brumley [Sat, 2 Feb 2019 08:53:29 +0000 (10:53 +0200)]
SCA hardening for mod. field inversion in EC_GROUP
This commit adds a dedicated function in `EC_METHOD` to access a modular
field inversion implementation suitable for the specifics of the
implemented curve, featuring SCA countermeasures.
The new pointer is defined as:
`int (*field_inv)(const EC_GROUP*, BIGNUM *r, const BIGNUM *a, BN_CTX*)`
and computes the multiplicative inverse of `a` in the underlying field,
storing the result in `r`.
Three implementations are included, each including specific SCA
countermeasures:
- `ec_GFp_simple_field_inv()`, featuring SCA hardening through
blinding.
- `ec_GFp_mont_field_inv()`, featuring SCA hardening through Fermat's
Little Theorem (FLT) inversion.
- `ec_GF2m_simple_field_inv()`, that uses `BN_GF2m_mod_inv()` which
already features SCA hardening through blinding.
From a security point of view, this also helps addressing a leakage
previously affecting conversions from projective to affine coordinates.
This commit also adds a new error reason code (i.e.,
`EC_R_CANNOT_INVERT`) to improve consistency between the three
implementations as all of them could fail for the same reason but
through different code paths resulting in inconsistent error stack
states.
Co-authored-by: Nicola Tuveri <nic.tuv@gmail.com>
(cherry picked from commit
e0033efc30b0f00476bba8f0fa5512be5dc8a3f1)
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/8263)
Corinna Vinschen [Mon, 18 Feb 2019 21:37:37 +0000 (22:37 +0100)]
cygwin: drop explicit O_TEXT
Cygwin binaries should not enforce text mode these days, just
use text mode if the underlying mount point requests it
Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8275)
Richard Levitte [Mon, 11 Feb 2019 11:22:02 +0000 (12:22 +0100)]
crypto/engine/eng_cryptodev.c: fix bignum<->crp conversion
bn2crparam() incorrectly delivered a big endian byte string to cryptodev.
Using BN_bn2lebinpad() instead of BN_bn2bin() fixes this.
crparam2bn() had a hack that avoided this issue in the other direction,
but allocated an intermediary chunk of memory to get correct endianness.
Using BN_lebin2bn() avoids this allocation.
Fixes #8202
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8204)
Bernd Edlinger [Wed, 30 Jan 2019 15:20:31 +0000 (16:20 +0100)]
Fix a crash in reuse of d2i_X509_PUBKEY
If the second PUBKEY is malformed there is use after free.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8135)
Tobias Stoeckmann [Tue, 11 Dec 2018 19:34:21 +0000 (20:34 +0100)]
Fixed typo (vi leftover).
There was a trailing :w at a line, which didn't make sense in context
of the sentence/styling. Removed it, because I think it's a leftover
vi command.
CLA: trivial
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7875)
(cherry picked from commit
143b631639f95822e5e00768254fa35c787f6396)
Andy Polyakov [Fri, 7 Dec 2018 21:19:57 +0000 (22:19 +0100)]
err/err.c: improve err_clear_last_constant_time's portability.
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7850)
(cherry picked from commit
91d0fd1c2753f0f7d6e0953eed3cfb6eb96d8ff4)
Andy Polyakov [Fri, 14 Sep 2018 15:24:13 +0000 (17:24 +0200)]
rsa/rsa_ssl.c: make RSA_padding_check_SSLv23 constant-time.
Copy of RSA_padding_check_PKCS1_type_2 with a twist that rejects padding
if nul delimiter is preceded by 8 consecutive 0x03 bytes.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
603221407ddc6404f8c417c6beadebf84449074c)
Resolved conflicts:
crypto/rsa/rsa_ssl.c
(Merged from https://github.com/openssl/openssl/pull/7735)
Andy Polyakov [Thu, 6 Sep 2018 19:54:23 +0000 (21:54 +0200)]
rsa/rsa_oaep.c: remove memcpy calls from RSA_padding_check_PKCS1_OAEP.
And make RSAErr call unconditional.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
75f5e944be97f28867e7c489823c889d89d0bd06)
(Merged from https://github.com/openssl/openssl/pull/7735)
Andy Polyakov [Sat, 1 Sep 2018 10:00:33 +0000 (12:00 +0200)]
rsa/rsa_pk1.c: remove memcpy calls from RSA_padding_check_PKCS1_type_2.
And make RSAErr call unconditional.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
e875b0cf2f10bf2adf73e0c2ec81428290f4660c)
(Merged from https://github.com/openssl/openssl/pull/7735)
Andy Polyakov [Fri, 14 Sep 2018 10:17:43 +0000 (12:17 +0200)]
rsa/rsa_ossl.c: make RSAerr call in rsa_ossl_private_decrypt unconditional.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
89072e0c2a483f2ad678e723e112712567b0ceb1)
(Merged from https://github.com/openssl/openssl/pull/7735)
Andy Polyakov [Sat, 1 Sep 2018 10:19:30 +0000 (12:19 +0200)]
err/err.c: add err_clear_last_constant_time.
Expected usage pattern is to unconditionally set error and then
wipe it if there was no actual error.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
f658a3b64d8750642f4975090740865f770c2a1b)
Resolved conflicts:
crypto/err/err.c
(Merged from https://github.com/openssl/openssl/pull/7735)
Richard Levitte [Fri, 7 Dec 2018 08:26:04 +0000 (09:26 +0100)]
Make EVP_PKEY_asn1_add0() stricter about its input
It turns out that the strictness that was implemented in
EVP_PKEY_asn1_new() (see Github openssl/openssl#6880) was badly placed
for some usages, and that it's better to do this check only when the
method is getting registered.
Fixes #7758
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7847)
(cherry picked from commit
a86003162138031137727147c9b642d99db434b1)
Richard Levitte [Sat, 24 Nov 2018 16:51:24 +0000 (17:51 +0100)]
Have util/mktar.sh display the absolute path to the tarball
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7696)
(cherry picked from commit
3be389435fc7b94623d972b622dbd9f0cd5c34f7)
Richard Levitte [Sat, 24 Nov 2018 10:27:50 +0000 (11:27 +0100)]
Make sure to run util/mktar.sh from the source directory
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7696)
(cherry picked from commit
b741f153b2f24139d7210b1b0c9caf561f4900e8)
Richard Levitte [Fri, 23 Nov 2018 23:59:33 +0000 (00:59 +0100)]
Don't export the submodules 'boringssl', 'krb5' and 'pyca-cryptography'
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7696)
(cherry picked from commit
76bc401cc63219a462224884cb4af787e17725ed)
Richard Levitte [Fri, 23 Nov 2018 13:43:16 +0000 (14:43 +0100)]
Don't export util/mktar.sh
When creating a tarball, it's pointless to include scripts that assume
a git workspace.
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7696)
(cherry picked from commit
b9a694717902af796639e1dff641ba620703303b)
Richard Levitte [Fri, 23 Nov 2018 13:40:39 +0000 (14:40 +0100)]
Document the removed 'dist' target
Also adds missing copyright boilerplate to util/mktar.sh
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7696)
(cherry picked from commit
b42922ea2f605fd6c42faad1743fb27be5f7f1f3)
Andy Polyakov [Wed, 7 Nov 2018 21:07:22 +0000 (22:07 +0100)]
rsa/rsa_ossl.c: cache MONT_CTX for public modulus earlier.
Blinding is performed more efficiently and securely if MONT_CTX for public
modulus is available by the time blinding parameter are instantiated. So
make sure it's the case.
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
2cc3f68cde77af23c61fbad65470602ee86f2575)
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7586)
Richard Levitte [Thu, 22 Nov 2018 20:29:02 +0000 (21:29 +0100)]
Remove all 'make dist' artifacts
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7692)
(cherry picked from commit
8d9535ec3e317641b8e551973c8cfe2ee1c89296)
Richard Levitte [Thu, 22 Nov 2018 20:17:47 +0000 (21:17 +0100)]
Change tarball making procedure
Since recently, OpenSSL tarballs are produced with 'make tar' rather
than 'make dist', as the latter has turned out to be more troublesome
than useful.
The next step to look at is why we would need to configure at all to
produce a Makefile just to produce a tarball. After all, the tarball
should now only contain source files that are present even without
configuring.
Furthermore, the current method for producing tarballs is a bit
complex, and can be greatly simplified with the right tools. Since we
have everything versioned with git, we might as well use the tool that
comes with it.
Added: util/mktar.sh, a simple script to produce OpenSSL tarballs. It
takes the options --name to modify the prefix of the distribution, and
--tarfile tp modify the tarball file name specifically.
This also adds a few entries in .gitattributes to specify files that
should never end up in a distribution tarball.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7692)
(cherry picked from commit
8c209eeef426ded66ce99048f535f35d08b88462)
Matt Caswell [Tue, 20 Nov 2018 13:42:16 +0000 (13:42 +0000)]
Prepare for 1.1.0k-dev
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 20 Nov 2018 13:41:22 +0000 (13:41 +0000)]
Prepare for 1.1.0j release
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 20 Nov 2018 13:21:36 +0000 (13:21 +0000)]
Update copyright year
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7670)
Matt Caswell [Tue, 20 Nov 2018 10:52:53 +0000 (10:52 +0000)]
Update CHANGES and NEWS for new release
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/7666)
Richard Levitte [Tue, 13 Nov 2018 16:57:45 +0000 (17:57 +0100)]
Fix typo in util/perl/OpenSSL/Test.pm
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7633)
(cherry picked from commit
2dc37bc2b4c678462a24d2904604e58c0c5ac1cb)
Richard Levitte [Tue, 13 Nov 2018 17:28:41 +0000 (18:28 +0100)]
test/recipes/90-test_shlibload.t needs $target{shared_extension}
We therefore must add defaults.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7631)
Richard Levitte [Tue, 13 Nov 2018 14:57:34 +0000 (15:57 +0100)]
Fix rpath-related Linux "test_shlibload" failure.
When libssl and libcrypto are compiled on Linux with "-rpath", but
not "--enable-new-dtags", the RPATH takes precedence over
LD_LIBRARY_PATH, and we end up running with the wrong libraries.
This is resolved by using full (or at least relative, rather than
just the filename to be found on LD_LIBRARY_PATH) paths to the
shared objects.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7631)
Richard Levitte [Tue, 13 Nov 2018 17:49:21 +0000 (18:49 +0100)]
Configuration: make sure the shared_sources table doesn't contain empty elements
Fixes #7634
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7635)
(cherry picked from commit
0c594ccc29f6ba241627f436ba3d05fc400d1066)
Richard Levitte [Wed, 31 Oct 2018 08:02:00 +0000 (09:02 +0100)]
Windows build: build foo.d after foo.obj
We made the build of foo.obj depend on foo.d, meaning the latter gets
built first. Unfortunately, the way the compiler works, we are forced
to redirect all output to foo.d, meaning that if the source contains
an error, the build fails without showing those errors.
We therefore remove the dependency and force the build of foo.d to
always happen after build of foo.obj.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7533)
Billy Brumley [Fri, 9 Nov 2018 07:25:43 +0000 (09:25 +0200)]
[crypto/bn] swap BN_FLG_FIXED_TOP too
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/7599)
(cherry picked from commit
dd41956d80686638d74fd203bd67060f90966280)
Richard Levitte [Fri, 9 Nov 2018 11:08:08 +0000 (12:08 +0100)]
Fix cherry-pick error
A couple of $(ECHO) sneaked in from patches in newer branches
Fixes #7600
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7601)
Richard Levitte [Fri, 9 Nov 2018 11:23:53 +0000 (12:23 +0100)]
VMS build: colon after target must be separated with a space
... otherwise, it's taken to be part of a device name.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7602)
(cherry picked from commit
e9994901f835420764d020968d4588fc09ec74c3)
Richard Levitte [Wed, 7 Nov 2018 15:13:57 +0000 (16:13 +0100)]
Have install targets depend on more precise build targets
We only had the main 'install' target depend on 'all'. This changes
the dependencies so targets like install_dev, install_runtime_libs,
install_engines and install_programs depend on build targets that are
correspond to them more specifically. This increases the parallel
possibilities.
Fixes #7466
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7583)
(cherry picked from commit
e8d01a608705e4320082a11a3870aa7e19c7290f)
Richard Levitte [Thu, 25 Oct 2018 07:09:20 +0000 (09:09 +0200)]
Allow parallel install
When trying 'make -j{n} install', you may occasionally run into
trouble because to sub-targets (install_dev and install_runtime) try
to install the same shared libraries. That makes parallel install
difficult.
This is solved by dividing install_runtime into two parts, one for
libraries and one for programs, and have install_dev depend on
install_runtime_libs instead of installing the shared runtime
libraries itself.
Fixes #7466
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7583)
(cherry picked from commit
c1123d9f7efb005a109aeccaba82c40bf9bd4c1d)
Pauli [Wed, 31 Oct 2018 22:44:11 +0000 (08:44 +1000)]
Add a constant time flag to one of the bignums to avoid a timing leak.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7549)
(cherry picked from commit
00496b6423605391864fbbd1693f23631a1c5239)
Rod Vagg [Mon, 29 Oct 2018 09:43:53 +0000 (20:43 +1100)]
Remove brace from bad cherry-pick of DSA reallocation fix
Commit
56fb454 backported the DSA reallocation fix to 1.1.0, however a
code block that has multiple statements in 1.1.1+ only has a `goto` in
1.1.0 so introduces a brace that causes a compile failure.
CLA:trivial
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7516)
Pauli [Fri, 26 Oct 2018 00:54:58 +0000 (10:54 +1000)]
Timing vulnerability in ECDSA signature generation (CVE-2018-0735)
Preallocate an extra limb for some of the big numbers to avoid a reallocation
that can potentially provide a side channel.
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/7486)
(cherry picked from commit
99540ec79491f59ed8b46b4edf130e17dc907f52)
Pauli [Tue, 23 Oct 2018 21:42:46 +0000 (07:42 +1000)]
Timing vulnerability in DSA signature generation (CVE-2018-0734).
Avoid a timing attack that leaks information via a side channel that
triggers when a BN is resized. Increasing the size of the BNs
prior to doing anything with them suppresses the attack.
Thanks due to Samuel Weiser for finding and locating this.
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/7486)
(cherry picked from commit
a9cfb8c2aa7254a4aa6a1716909e3f8cb78049b6)
Pauli [Sun, 28 Oct 2018 20:50:51 +0000 (06:50 +1000)]
DSA mod inverse fix
There is a side channel attack against the division used to calculate one of
the modulo inverses in the DSA algorithm. This change takes advantage of the
primality of the modulo and Fermat's little theorem to calculate the inverse
without leaking information.
Thanks to Samuel Weiser for finding and reporting this.
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/7487)
(cherry picked from commit
415c33563528667868c3c653a612e6fc8736fd79)
Dr. Matthias St. Pierre [Thu, 18 Oct 2018 21:04:32 +0000 (23:04 +0200)]
md_rand.c: don't stop polling until properly initialized
Previously, the RNG sets `initialized=1` after the first call to
RAND_poll(), although its criterion for being initialized actually
is whether condition `entropy >= ENTROPY_NEEDED` is true.
This commit now assigns `initialized=(entropy >= ENTROPY_NEEDED)`,
which has the effect that on the next call, RAND_poll() will be
called again, if it previously failed to obtain enough entropy.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7438)
Andy Polyakov [Wed, 17 Oct 2018 08:09:33 +0000 (10:09 +0200)]
arch/async_posix.h: improve portability.
{make|swap|get|set}context are removed in POSIX.1-2008, but glibc
apparently keeps providing it.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7420)
(cherry picked from commit
9d71a24ebf57e7157888af1ca587eafe914bf96f)
Viktor Dukhovni [Mon, 8 Oct 2018 16:05:14 +0000 (12:05 -0400)]
Apply self-imposed path length also to root CAs
Also, some readers of the code find starting the count at 1 for EE
cert confusing (since RFC5280 counts only non-self-issued intermediate
CAs, but we also counted the leaf). Therefore, never count the EE
cert, and adjust the path length comparison accordinly. This may
be more clear to the reader.
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
dc5831da59e9bfad61ba425d886a0b06ac160cd6)
Viktor Dukhovni [Fri, 5 Oct 2018 03:53:01 +0000 (23:53 -0400)]
Only CA certificates can be self-issued
At the bottom of https://tools.ietf.org/html/rfc5280#page-12 and
top of https://tools.ietf.org/html/rfc5280#page-13 (last paragraph
of above https://tools.ietf.org/html/rfc5280#section-3.3), we see:
This specification covers two classes of certificates: CA
certificates and end entity certificates. CA certificates may be
further divided into three classes: cross-certificates, self-issued
certificates, and self-signed certificates. Cross-certificates are
CA certificates in which the issuer and subject are different
entities. Cross-certificates describe a trust relationship between
the two CAs. Self-issued certificates are CA certificates in which
the issuer and subject are the same entity. Self-issued certificates
are generated to support changes in policy or operations. Self-
signed certificates are self-issued certificates where the digital
signature may be verified by the public key bound into the
certificate. Self-signed certificates are used to convey a public
key for use to begin certification paths. End entity certificates
are issued to subjects that are not authorized to issue certificates.
that the term "self-issued" is only applicable to CAs, not end-entity
certificates. In https://tools.ietf.org/html/rfc5280#section-4.2.1.9
the description of path length constraints says:
The pathLenConstraint field is meaningful only if the cA boolean is
asserted and the key usage extension, if present, asserts the
keyCertSign bit (Section 4.2.1.3). In this case, it gives the
maximum number of non-self-issued intermediate certificates that may
follow this certificate in a valid certification path. (Note: The
last certificate in the certification path is not an intermediate
certificate, and is not included in this limit. Usually, the last
certificate is an end entity certificate, but it can be a CA
certificate.)
This makes it clear that exclusion of self-issued certificates from
the path length count applies only to some *intermediate* CA
certificates. A leaf certificate whether it has identical issuer
and subject or whether it is a CA or not is never part of the
intermediate certificate count. The handling of all leaf certificates
must be the same, in the case of our code to post-increment the
path count by 1, so that we ultimately reach a non-self-issued
intermediate it will be the first one (not zeroth) in the chain
of intermediates.
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
ed422a2d0196ada0f5c1b6e296f4a4e5ed69577f)
Andy Polyakov [Fri, 12 Oct 2018 20:17:51 +0000 (22:17 +0200)]
ssl/s3_enc.c: fix logical errors in ssl3_final_finish_mac.
(back-port of commit
7d0effeacbb50b12bfc24df7614d7cf5c8686f51)
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7392)
Benjamin Kaduk [Thu, 4 Oct 2018 18:49:21 +0000 (13:49 -0500)]
apps: allow empty attribute values with -subj
Historically (i.e., OpenSSL 1.0.x), the openssl applications would
allow for empty subject attributes to be passed via the -subj argument,
e.g., `opensl req -subj '/CN=joe/O=/OU=local' ...`. Commit
db4c08f0194d58c6192f0d8311bf3f20e251cf4f applied a badly needed rewrite
to the parse_name() helper function that parses these strings, but
in the process dropped a check that would skip attributes with no
associated value. As a result, such strings are now treated as
hard errors and the operation fails.
Restore the check to skip empty attribute values and restore
the historical behavior.
Document the behavior for empty subject attribute values in the
corresponding applications' manual pages.
(cherry picked from commit
3d362f190306b62a17aa2fd475b2bc8b3faa8142)
(cherry picked from commit
a7ee1ef61b1893038008691a4a6979cf2da91439)
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7368)
Tomas Mraz [Tue, 9 Oct 2018 16:37:10 +0000 (18:37 +0200)]
Fix copy&paste error found in Coverity scan
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7377)
(cherry picked from commit
628ee796389b555ddb5fc28355e16e9417ab1724)
Andy Polyakov [Wed, 5 Sep 2018 12:33:21 +0000 (14:33 +0200)]
rsa/rsa_ossl.c: fix and extend commentary [skip ci].
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/7123)
(cherry picked from commit
d1c008f66bad435b18aa45aa59f72bed7c682849)
Richard Levitte [Sun, 30 Sep 2018 00:18:47 +0000 (02:18 +0200)]
Clean out aliases in include/openssl/symhacks.h
Only a few clashing ones remain
Reviewed-by: Paul Yang <yang.yang@baishancloud.com>
(Merged from https://github.com/openssl/openssl/pull/7331)
(cherry picked from commit
b44882a0bd0717e0aab84f5dc3ef81ab673155e9)
Richard Levitte [Sat, 29 Sep 2018 23:59:11 +0000 (01:59 +0200)]
Small cleanup (util/mkdef.pl, crypto/bio/bss_log.c, include/openssl/ocsp.h)
BIO_s_log() is declared for everyone, so should return NULL when not
actually implemented. Also, it had explicit platform limitations in
util/mkdef.pl that didn't correspond to what was actually in code.
While at it, a few other hard coded things that have lost their
relevance were removed.
include/openssl/ocsp.h had a few duplicate declarations.
Reviewed-by: Paul Yang <yang.yang@baishancloud.com>
(Merged from https://github.com/openssl/openssl/pull/7331)
(cherry picked from commit
7e09c5eaa57295f87453286ffe25277c2f2bc73f)
Sohaib ul Hassan [Sat, 16 Jun 2018 14:07:40 +0000 (17:07 +0300)]
Implement coordinate blinding for EC_POINT
This commit implements coordinate blinding, i.e., it randomizes the
representative of an elliptic curve point in its equivalence class, for
prime curves implemented through EC_GFp_simple_method,
EC_GFp_mont_method, and EC_GFp_nist_method.
This commit is derived from the patch
https://marc.info/?l=openssl-dev&m=
131194808413635 by Billy Brumley.
Coordinate blinding is a generally useful side-channel countermeasure
and is (mostly) free. The function itself takes a few field
multiplicationss, but is usually only necessary at the beginning of a
scalar multiplication (as implemented in the patch). When used this way,
it makes the values that variables take (i.e., field elements in an
algorithm state) unpredictable.
For instance, this mitigates chosen EC point side-channel attacks for
settings such as ECDH and EC private key decryption, for the
aforementioned curves.
For EC_METHODs using different coordinate representations this commit
does nothing, but the corresponding coordinate blinding function can be
easily added in the future to extend these changes to such curves.
Co-authored-by: Nicola Tuveri <nic.tuv@gmail.com>
Co-authored-by: Billy Brumley <bbrumley@gmail.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6526)
Billy Brumley [Wed, 22 Aug 2018 06:50:43 +0000 (09:50 +0300)]
[test] ECC: make sure negative tests pass for the right reasons
This is a backport of #7028 to 1.1.0.
It squashes the two original commits and applies changes for
compatibility with 1.1.0.
1. cherry picked from commit
30c41bfb158c0f595809d0eaf032926a3c2cf236
[test] ECC: make sure negative tests pass for the right reasons
2. cherry picked from commit
bfb10b975818d1887d676d309fcc21a765611f6d
[test] throw error from wrapper function instead of an EC_METHOD specific one
Given that in 1.1.0 `EC_POINT_get_affine_coordinates_GFp` and
`EC_POINT_get_affine_coordinates_GF2m` have not been unified, in this
backport the tests distinguish between the 2 different functions as the
cause of the expected error.
[extended tests] to trigger sanitizer checks and coverage analysis.
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7152)
Billy Brumley [Thu, 28 Jun 2018 07:59:08 +0000 (10:59 +0300)]
More EVP ECC testing: positive and negative
This is a backport of #6608 to 1.1.0.
1. For every named curve, two "golden" keypair positive tests.
2. Also two "golden" stock ECDH positive tests.
3. For named curves with non-trivial cofactors, additionally two "golden"
ECC CDH positive tests.
4. For named curves with non-trivial cofactors, additionally two negative
tests.
There is some overlap with existing EVP tests, especially for the NIST
curves (for example, positive testing ECC CDH KATs for NIST curves).
"Golden" here means all the values are independent from OpenSSL's ECC
code. I used sage to calculate them. What comes from OpenSSL is:
1. The OIDs (parsed by tooling)
2. The curve parameters (parsing ecparam output with tooling)
The values inside the PEMs (private keys, public keys) and shared keys
are from sage. The PEMs themselves are the output of asn1parse, with
input taken from sage.
(cherry picked from commit
249330de0250bc598d20d383bab37d150cdad239)
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7152)
Nicola Tuveri [Fri, 7 Sep 2018 15:27:56 +0000 (18:27 +0300)]
Move evp test programs input data to its own data dir
This is a manual backport of #3472 to 1.1.0.
This is a partial backport, limited only to evptests, as #3472 also
affected bntests, which has a completely different form in 1.1.0.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7152)
Nicola Tuveri [Fri, 7 Sep 2018 15:14:30 +0000 (18:14 +0300)]
Split test/evptests.txt into separate files.
This is a manual port of #3443 (and the related bugfix PR #3452) to
1.1.0.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7152)
Daniel Bevenius [Mon, 24 Sep 2018 06:43:35 +0000 (08:43 +0200)]
Document OPENSSL_VERSION_TEXT macro
This commit documents the OPENSSL_VERSION_TEXT which is currently
missing in the man page.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7301)
(cherry picked from commit
7c69495712e3dc9aa8db38271f0c3faeb2037165)
Pauli [Mon, 24 Sep 2018 01:21:18 +0000 (11:21 +1000)]
Use secure_getenv(3) when available.
Change all calls to getenv() inside libcrypto to use a new wrapper function
that use secure_getenv() if available and an issetugid then getenv if not.
CPU processor override flags are unchanged.
Extra checks for OPENSSL_issetugid() have been removed in favour of the
safe getenv.
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/7047)
(cherry picked from commit
5c39a55d04ea6e6f734b627a050b9e702788d50d)
Richard Levitte [Fri, 21 Sep 2018 09:11:15 +0000 (11:11 +0200)]
crypto/bn/asm/x86_64-gcc.c: remove unnecessary redefinition of BN_ULONG
This module includes bn.h via other headers, so it picks up the
definition from there and doesn't need to define them locally (any
more?). Worst case scenario, the redefinition may be different and
cause all sorts of compile errors.
Fixes #7227
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/7287)
(cherry picked from commit
dda5396aaec315bdbcb080e42fb5cd0191f2ad72)
Richard Levitte [Wed, 19 Sep 2018 19:33:45 +0000 (21:33 +0200)]
crypto/ui/ui_openssl.c: make sure to recognise ENXIO and EIO too
These both indicate that the file descriptor we're trying to use as a
terminal isn't, in fact, a terminal.
Fixes #7271
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7272)
(cherry picked from commit
276bf8620ce35a613c856f2b70348f65ffe94067)
Pauli [Sun, 16 Sep 2018 21:47:42 +0000 (07:47 +1000)]
Use 'i' as parameter name not 'I'.
The latter causes problems when complex.h is #included.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7233)
(cherry picked from commit
972f67889b5a10c33dbc3d500cfa65b544e68b46)
Pauli [Sun, 16 Sep 2018 22:09:25 +0000 (08:09 +1000)]
Add a compile time test to verify that openssl/rsa.h and complex.h can
coexist.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7233)
(cherry picked from commit
da5fac72b1cba5651b871902eea234e693cf01e5)
Matt Caswell [Wed, 12 Sep 2018 15:49:19 +0000 (16:49 +0100)]
Add an explicit cast to time_t
Caused a compilation failure in some environments
Fixes #7204
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7205)
(cherry picked from commit
bc278f30f0b766bfb82426c641dc1d51ace4a994)