Matt Caswell [Wed, 17 Oct 2018 15:17:25 +0000 (16:17 +0100)]
Don't artificially limit the size of the ClientHello
We were setting a limit of SSL3_RT_MAX_PLAIN_LENGTH on the size of the
ClientHello. AFAIK there is nothing in the standards that requires this
limit.
The limit goes all the way back to when support for extensions was first
added for TLSv1.0. It got converted into a WPACKET max size in 1.1.1. Most
likely it was originally added to avoid the complexity of having to grow
the init_buf in the middle of adding extensions. With WPACKET this is
irrelevant since it will grow automatically.
This issue came up when an attempt was made to send a very large
certificate_authorities extension in the ClientHello.
We should just remove the limit.
Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7424)
FdaSilvaYY [Tue, 8 Jan 2019 06:27:27 +0000 (16:27 +1000)]
Fix CID 1434549: Unchecked return value in test/evp_test.c
5. check_return: Calling EVP_EncodeUpdate without checking return value
(as is done elsewhere 4 out of 5 times).
Fix CID 1371695, 1371698: Resource leak in test/evp_test.c
- leaked_storage: Variable edata going out of scope leaks the storage it
points to.
- leaked_storage: Variable encode_ctx going out of scope leaks the
storage it points to
Fix CID 1430437, 1430426, 1430429 : Dereference before null check in test/drbg_cavs_test.c
check_after_deref: Null-checking drbg suggests that it
may be null, but it has already been dereferenced on all paths leading
to the check
Fix CID 1440765: Dereference before null check in test/ssltestlib.c
check_after_deref: Null-checking ctx suggests that it may be null, but
it has already been dereferenced on all paths leading to the check.
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <paul.dale@oracle.com> 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/7993)
Viktor Dukhovni [Tue, 1 Jan 2019 07:53:24 +0000 (02:53 -0500)]
More configurable crypto and ssl library initialization
1. In addition to overriding the default application name,
one can now also override the configuration file name
and flags passed to CONF_modules_load_file().
2. By default we still keep going when configuration file
processing fails. But, applications that want to be
strict about initialization errors can now make explicit
flag choices via non-null OPENSSL_INIT_SETTINGS that omit
the CONF_MFLAGS_IGNORE_RETURN_CODES flag (which had so far
been both undocumented and unused).
3. In OPENSSL_init_ssl() do not request OPENSSL_INIT_LOAD_CONFIG
if the options already include OPENSSL_INIT_NO_LOAD_CONFIG.
4. Don't set up atexit() handlers when called with opts equal to
OPENSSL_INIT_BASE_ONLY (this flag should only be used alone).
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de> Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7969)
Matt Caswell [Fri, 4 Jan 2019 16:55:15 +0000 (16:55 +0000)]
Add a test for correct handling of the cryptopro bug extension
This was complicated by the fact that we were using this extension for our
duplicate extension handling tests. In order to add tests for cryptopro
bug the duplicate extension handling tests needed to change first.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7984)
Matt Caswell [Fri, 4 Jan 2019 16:54:03 +0000 (16:54 +0000)]
Don't complain if we receive the cryptopro extension in the ClientHello
The cryptopro extension is supposed to be unsolicited and appears in the
ServerHello only. Additionally it is unofficial and unregistered - therefore
we should really treat it like any other unknown extension if we see it in
the ClientHello.
Fixes #7747
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7984)
Matt Caswell [Fri, 4 Jan 2019 10:24:19 +0000 (10:24 +0000)]
Fix no-cmac
Reviewed-by: Tim Hudson <tjh@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7979)
Matt Caswell [Thu, 15 Nov 2018 16:59:41 +0000 (16:59 +0000)]
Don't link shlibloadtest against libcrypto
The whole point of shlibloadtest is to test dynamically loading and
unloading the library. If we link shlibloadtest against libcrypto then that
might mask potential issues.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7983)
Matt Caswell [Tue, 20 Nov 2018 15:32:55 +0000 (15:32 +0000)]
Fix a RUN_ONCE bug
We have a number of instances where there are multiple "init" functions for
a single CRYPTO_ONCE variable, e.g. to load config automatically or to not
load config automatically. Unfortunately the RUN_ONCE mechanism was not
correctly giving the right return value where an alternative init function
was being used.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7983)
Behrang [Thu, 20 Dec 2018 12:56:03 +0000 (23:56 +1100)]
Fixed minor typo in the req.pod docs
CLA: Trivial
Fixes #7928.
Reviewed-by: Paul Yang <yang.yang@baishancloud.com> Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7973)
Reviewed-by: Tim Hudson <tjh@openssl.org> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7959)
Jung-uk Kim [Thu, 13 Dec 2018 23:18:16 +0000 (18:18 -0500)]
Do not complain when /dev/crypto does not exist.
FreeBSD does not enable cryptodev(4) by default. OpenBSD disabled support
for /dev/crypto by default from 4.9 and removed it from 5.7. Now the engine
is properly enabled by default on BSD platforms (see #7885), it continuously
complains:
Could not open /dev/crypto: No such file or directory
Hide the nagging error message behind ENGINE_DEVCRYPTO_DEBUG.
CLA: trivial
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7896)
Shreya Bhandare [Thu, 13 Dec 2018 17:29:10 +0000 (22:59 +0530)]
EVP_PKEY_size declared to take a const parameter
CLA: trivial
Function EVP_PKEY_size has been modified to take a const parameter
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Kurt Roeckx <kurt@roeckx.be> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7892)
Fix:
CID 1338183 (#1 of 1): Improper use of negative value (NEGATIVE_RETURNS)
CID 1371691 (#1 of 1): Improper use of negative value (NEGATIVE_RETURNS)
CID 1371692 (#1 of 1): Improper use of negative value (NEGATIVE_RETURNS)
[extended tests]
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7359)
FdaSilvaYY [Sun, 7 Oct 2018 19:47:31 +0000 (21:47 +0200)]
Coverity fix in apps/oscp
CID 1440002 (#1 of 1): Use after free (USE_AFTER_FREE)
Not a deadly error, because error was just before app exit.
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7359)
Ken Goldman [Fri, 14 Dec 2018 20:04:04 +0000 (15:04 -0500)]
Admit unknown pkey types at security level 0
The check_key_level() function currently fails when the public key
cannot be extracted from the certificate because its algorithm is not
supported. However, the public key is not needed for the last
certificate in the chain.
This change moves the check for level 0 before the check for a
non-NULL public key.
For background, this is the TPM 1.2 endorsement key certificate.
I.e., this is a real application with millions of certificates issued.
The key is an RSA-2048 key.
The TCG (for a while) specified
Public Key Algorithm: rsaesOaep
rather than the commonly used
Public Key Algorithm: rsaEncryption
because the key is an encryption key rather than a signing key.
The X509 certificate parser fails to get the public key.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7906)
Christian Heimes [Mon, 17 Dec 2018 21:56:17 +0000 (22:56 +0100)]
Fix function names in ct(7) documentation
The correct function name is SSL_CTX_enable_ct, not SSL_CTX_ct_enable.
Signed-off-by: Christian Heimes <christian@python.org> Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7916)
man: harmonize the various formulations in the HISTORY sections
While stereotyped repetitions are frowned upon in literature, they
serve a useful purpose in manual pages, because it is easier for
the user to find certain information if it is always presented in
the same way. For that reason, this commit harmonizes the varying
formulations in the HISTORY section about which functions, flags,
etc. were added in which OpenSSL version.
It also attempts to make the pod files more grep friendly by
avoiding to insert line breaks between the symbol names and the
corresponding version number in which they were introduced
(wherever possible). Some punctuation and typographical errors
were fixed on the way.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7854)
Richard Levitte [Fri, 14 Dec 2018 18:33:55 +0000 (19:33 +0100)]
ERR: preserve system error number in a few more places
It turns out that intialization may change the error number, so we
need to preserve the system error number in functions where
initialization is called for.
These are ERR_get_state() and err_shelve_state()
Fixes #7897
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7902)
Jakub Jelen [Wed, 12 Dec 2018 10:22:00 +0000 (11:22 +0100)]
Use the correct function name
CLA: trivial
Signed-off-by: Jakub Jelen <jjelen@redhat.com> Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7887)
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)
Digest must be able to do partial-state copy to be used.
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
The engine needs a custom cipher context copy function to open a new
/dev/crypto session.
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
eng_devcrypto: close session on cleanup, not final
Close the session in digest_cleanup instead of digest_final. A failure
in closing the session does not mean a previous successful digest final
has failed as well.
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
If the source ctx has not been initialized, don't initialize the copy
either.
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
Return failure when the digest_ctx is null in digest_update and
digest_final, and when md is null in digest_final.
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
Call functions to prepare methods after confirming that /dev/crytpo was
sucessfully open and that the destroy function has been set.
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com> 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/7585)
Matt Caswell [Wed, 21 Nov 2018 11:57:04 +0000 (11:57 +0000)]
Preserve errno on dlopen
For the same reasons as in the previous commit we must preserve errno
across dlopen calls. Some implementations (e.g. solaris) do not preserve
errno even on a successful dlopen call.
Fixes #6953
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7680)
Matt Caswell [Wed, 21 Nov 2018 11:44:42 +0000 (11:44 +0000)]
Make sure build_SYS_str_reasons() preserves errno
This function can end up being called during ERR_get_error() if we are
initialising. ERR_get_error() must preserve errno since it gets called via
SSL_get_error(). If that function returns SSL_ERROR_SYSCALL then you are
supposed to inspect errno.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7680)
Reviewed-by: Kurt Roeckx <kurt@roeckx.be> Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7850)
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)
FdaSilvaYY [Wed, 17 Oct 2018 20:30:32 +0000 (22:30 +0200)]
Doc: fix reference to deprecated methods.
Reviewed-by: Paul Yang <yang.yang@baishancloud.com> Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7705)
Matt Caswell [Tue, 4 Dec 2018 08:37:04 +0000 (08:37 +0000)]
Fix some SSL_export_keying_material() issues
Fix some issues in tls13_hkdf_expand() which impact the above function
for TLSv1.3. In particular test that we can use the maximum label length
in TLSv1.3.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7755)
Fixed-top interfaces tolerate zero-padded inputs and facilitate
constant-time-ness. bn_div_fixed_top tolerates zero-padded dividend,
but not divisor. It's argued that divisor's length is public even
when value is secret.
[extended tests]
Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7589)
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)
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)
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)
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)
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)
Richard Levitte [Tue, 27 Nov 2018 07:51:44 +0000 (07:51 +0000)]
Don't test the collected system errors when configured to not have them
Config options 'no-err' and 'no-autoerrinit'
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tim Hudson <tjh@openssl.org> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7711)
Billy Brumley [Mon, 12 Nov 2018 13:47:54 +0000 (15:47 +0200)]
Clean up BN_consttime_swap.
Updated "condition" logic lifted from Theo Buehler's LibreSSL commit https://github.com/libressl-portable/openbsd/commit/517358603b4be76d48a50007a0d414c2072697dd
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/7619)
David Woodhouse [Tue, 16 Oct 2018 14:41:17 +0000 (07:41 -0700)]
Stop marking default digest for EC keys as mandatory
ASN1_PKEY_CTRL_DEFAULT_MD_NID is documented to return 2 for a mandatory
digest algorithm, when the key can't support any others. That isn't true
here, so return 1 instead.
Partially fixes #7348
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com> Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit eb7eb1378cd15c4652884b3701d4c0ef27b5b8a6)
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7609)
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)
Richard Levitte [Wed, 21 Nov 2018 17:25:53 +0000 (18:25 +0100)]
Smarter build of system error text database
We stored copies of the system error texts in a fixed line size array,
which is a huge waste. Instead, use a static memory pool and pack all
the string in there. The wasted space at the end, if any, gives us
some leeway for longer strings than we have measured so far.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7681)
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>
(Merged from https://github.com/openssl/openssl/pull/7586)
Matthew Hodgson [Wed, 21 Nov 2018 02:00:52 +0000 (02:00 +0000)]
openssl s_server: don't use sendto() with connected UDP socket
Fixes #7675
On macOS, if you call `connect()` on a UDP socket you cannot then
call `sendto()` with a destination, otherwise it fails with Err#56
('socket is already connected').
By calling `BIO_ctrl_set_connected()` on the wbio we can tell it
that the socket has been connected and make it call `send()` rather
than `sendto()`.
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7676)
cclauss [Tue, 16 Oct 2018 05:18:00 +0000 (07:18 +0200)]
Travis CI: Use flake8 to find Python syntax errors or undefined names
CLA: trivial
In Travis CI, add a Python linting step that runs flake8 tests in Travis CI
to find syntax errors and undefined names. (http://flake8.pycqa.org)
__E901,E999,F821,F822,F823__ are the "_showstopper_" flake8 issues that can halt
the runtime with a SyntaxError, NameError, etc. Most other flake8 issues are
merely "style violations" -- useful for readability but they do not effect
runtime safety.
* F821: undefined name `name`
* F822: undefined name `name` in `__all__`
* F823: local variable name referenced before assignment
* E901: SyntaxError or IndentationError
* E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree
Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/7410)