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2023-09-07Copyright year updatesMatt Caswell
Reviewed-by: Richard Levitte <levitte@openssl.org> Release: yes
2023-09-04Move ALIGN32 and ALIGN64 into common.h, and fix for clang-cl.exeTom Cosgrove
clang-cl.exe defines __clang__ and _MSC_VER but not __GNUC__, so a clang- specific guard is needed to get the correct ALIGNxx versions. Fixes #21914 Change-Id: Icdc047b182ad1ba61c7b1b06a1e951eda1a0c33d Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/21921)
2023-08-14Don't call ossl_assert on the result of bn_wexpandMatt Caswell
bn_wexpand can fail as the result of a memory allocation failure. We should not be calling ossl_assert() on its result because it can fail in normal operation. Found via the reproducible error injection in #21668 Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com> Reviewed-by: Kurt Roeckx <kurt@roeckx.be> (Merged from https://github.com/openssl/openssl/pull/21725)
2023-06-26Check for 0 modulus in BN_RECP_CTX_set.fullwaywang
The function BN_RECP_CTX_set did not check whether arg d is zero, in which case an early failure should be returned to the invoker. This is a similar fix to the cognate defect of CVE-2015-1794. Fixes #21111 CLA: trivial Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/21255)
2023-06-15Fix typos found by codespellDimitri Papadopoulos
Typos in doc/man* will be fixed in a different commit. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20910)
2023-06-10Coverity 1528485: Remove unused assignment of wvalueTomas Mraz
wvalue is always initialized at the beginning of each cycle and used only within the cycle Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Todd Short <todd.short@me.com> (Merged from https://github.com/openssl/openssl/pull/21145)
2023-06-10Coverity 1528494 and 1528493: Remove unused assignment of wvalueTomas Mraz
wvalue is always initialized at the beginning of each cycle and used only within the cycle
2023-05-11Fix a typo found by codespell in a variable nameDimitri Papadopoulos
The change is limited to a single C file. CLA: trivial Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20912)
2023-04-16bn_local: remove unused `PTR_SIZE_INT` definitionAlois Klink
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20748)
2023-04-16bn_nist: remove unused type-punning union `u`Alois Klink
We no longer need to cast function pointers to PTR_SIZE_INT. Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20748)
2023-04-16bn_nist: replace pointer bit-fiddling with ternaryAlois Klink
Bit-fiddling pointers is technically implementation defined behavior in the C specification so the following code is not supported in all platforms: PTR_SIZE_INT mask; void * a, b, c; int boolean_flag; mask = 0 - boolean_flag; /* Not guaranteed to be a valid ptr to a or b on all platforms */ a = (void *) ((((PTR_SIZE_INT) b & ~mask) | (((PTR_SIZE_INT)) c & mask))); Using a ternary conditional operator is supported on all platforms (i.e. `a = boolean_flag ? b : c;`). On most modern compilers/CPUs, this will be faster, since it will get converted to a CMOV instruction. Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20748)
2023-04-04Alternative fix for CVE-2022-4304Bernd Edlinger
This is about a timing leak in the topmost limb of the internal result of RSA_private_decrypt, before the padding check. There are in fact at least three bugs together that caused the timing leak: First and probably most important is the fact that the blinding did not use the constant time code path at all when the RSA object was used for a private decrypt, due to the fact that the Montgomery context rsa->_method_mod_n was not set up early enough in rsa_ossl_private_decrypt, when BN_BLINDING_create_param needed it, and that was persisted as blinding->m_ctx, although the RSA object creates the Montgomery context just a bit later. Then the infamous bn_correct_top was used on the secret value right after the blinding was removed. And finally the function BN_bn2binpad did not use the constant-time code path since the BN_FLG_CONSTTIME was not set on the secret value. In order to address the first problem, this patch makes sure that the rsa->_method_mod_n is initialized right before the blinding context. And to fix the second problem, we add a new utility function bn_correct_top_consttime, a const-time variant of bn_correct_top. Together with the fact, that BN_bn2binpad is already constant time if the flag BN_FLG_CONSTTIME is set, this should eliminate the timing oracle completely. In addition the no-asm variant may also have branches that depend on secret values, because the last invocation of bn_sub_words in bn_from_montgomery_word had branches when the function is compiled by certain gcc compiler versions, due to the clumsy coding style. So additionally this patch stream-lined the no-asm C-code in order to avoid branches where possible and improve the resulting code quality. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20281)
2023-04-04Revert "Fix Timing Oracle in RSA decryption"Bernd Edlinger
This reverts commit b1892d21f8f0435deb0250f24a97915dc641c807. Except for the moving derive_kdk to a separate function. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20281)
2023-03-29Ensure there's only one copy of OPENSSL_armcap_P in libcrypto.aTom Cosgrove
Change-Id: Ia94e528a2d55934435de6a2949784c52eb38d82f Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20621)
2023-03-17rsaz-*k-avx512.pl: fix wrong name of avx512 flag variableTomas Mraz
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com> Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20519) (cherry picked from commit d4765408c705f704f7cf33bd32bfb713061954a7)
2023-03-15Add missing copyright headerPauli
This file was only recently introduced and the missing header slipped through the review process. Fixes #20461 Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20470)
2023-02-20Fix incorrect error branch in ossl_bn_rsa_fips186_4_derive_prime()ndossche
BN_priv_rand_range_ex() and BN_add() both return a 0 on failure and a 1 on success. In case of failure, the algorithm should fail. However, the branch that it goes through on failure is "goto end", not "goto err". Therefore, the algorithm will return 1 which indicates success instead of 0 for failure, leading to potential problems for the callers. Fix it by changing the goto to "goto err" instead of "goto end". CLA: trivial Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Todd Short <todd.short@me.com> (Merged from https://github.com/openssl/openssl/pull/20279)
2023-02-11rsa: add msvc intrinsic for non x64 platformsHubert Kario
_umul128() is x86_64 (x64) only, while __umulh() works everywhere, but doesn't generate optimal code on x64 Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20244)
2023-02-08S390x: Support ME and CRT offloadingJuergen Christ
S390x has to ability to offload modular exponentiation and CRT operations to Crypto Express Adapters. This possible performance optimization was not yet used by OpenSSL. Add support for offloading and implement an optimized version of RSA and DH with it. The environment variable OPENSSL_s390xcap now recognizes the token "nocex" to prevent offloading. Signed-off-by: Juergen Christ <jchrist@linux.ibm.com> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20113)
2023-02-07Fix Timing Oracle in RSA decryptionDmitry Belyavskiy
A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. Patch written by Dmitry Belyavsky and Hubert Kario CVE-2022-4304 Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org>
2023-01-31Avoid duplicating symbols in legacy.a with some build optionsTomas Mraz
If no-module or no-shared is used, the symbols from libcrypto should not be duplicated in legacy.a Also the BIGNUM functions are currently not needed in legacy.a at all. Fixes #20124 Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20137)
2023-01-20bn2bin(): Don't accept len < 0Richard Levitte
Test included Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20033)
2023-01-20bin2bn(): When len==0, just return a zero BIGNUMRichard Levitte
This allows calls with s==NULL and len==0 to be safe. It probably already was, but address sanitizers could still complain. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20033)
2023-01-14Limit size of modulus for bn_mul_mont and BN_mod_exp_mont_consttimeBernd Edlinger
Otherwise the alloca can cause an exception. Issue reported by Jiayi Lin. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Todd Short <todd.short@me.com> (Merged from https://github.com/openssl/openssl/pull/20005)
2023-01-14Revert "Limit size of modulus for BN_mod_exp_mont_consttime()"Bernd Edlinger
This reverts commit 4378e3cd2a4d73a97a2349efaa143059d8ed05e8. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Todd Short <todd.short@me.com> (Merged from https://github.com/openssl/openssl/pull/20005)
2023-01-09rsaz_exp_x2.c: Remove unused ALIGN64 macroTomas Mraz
Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19597)
2023-01-09rsaz_exp_x2.c: Avoid potential undefined behavior with strict aliasingTomas Mraz
Fixes #19584 Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19597)
2023-01-09Revert "Fix an occasional CI failure due to unaligned access"Tomas Mraz
This reverts commit 8511520842b744d1794ea794c032ce5f78cd874b. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19597)
2023-01-04Cleanse internal BN_generate_dsa_nonce() buffers used to generate k.slontis
Fixes #9205 Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19954)
2022-11-23Improve FIPS RSA keygen performance.slontis
Reduce the Miller Rabin counts to the values specified by FIPS 186-5. The old code was using a fixed value of 64. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19579)
2022-11-21Improve FIPS RSA keygen performance.slontis
FIPS 186-4 has 5 different algorithms for key generation, and all of them rely on testing GCD(a,n) == 1 many times. Cachegrind was showing that during a RSA keygen operation, the function BN_gcd() was taking a considerable percentage of the total cycles. The default provider uses multiprime keygen, which seemed to be much faster. This is because it uses BN_mod_inverse() instead. For a 4096 bit key, the entropy of a key that was taking a long time to generate was recorded and fed back into subsequent runs. Roughly 40% of the cycle time was BN_gcd() with most of the remainder in the prime testing. Changing to use the inverse resulted in the cycle count being 96% in the prime testing. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19578)
2022-11-10Limit size of modulus for BN_mod_exp_mont_consttime()Tomas Mraz
Otherwise the powerbufLen can overflow. Issue reported by Jiayi Lin. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> (Merged from https://github.com/openssl/openssl/pull/19632)
2022-10-13Fix LLVM vs Apple LLVM version numbering confusion, for $avx512ifmaRichard Levitte
Apple LLVM has a different version numbering scheme than upstream LLVM. That makes for quite a bit of confusion. https://en.wikipedia.org/wiki/Xcode#Toolchain_versions to the rescue, they have collected quite a lot of useful data. This change is concentrated around the `$avx512ifma` flag Fixes #16670 for the master branch Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19361)
2022-10-13Fix an occasional CI failure due to unaligned accessBernd Edlinger
This happens rarely, but only because very few CI runs use the exotic CPU type that is necessary to execute anything within rsaz_exp_x2.c and enable UBSAN at the same time. crypto/bn/rsaz_exp_x2.c:562:20: runtime error: load of misaligned address 0x612000022cc6 for type 'uint64_t' (aka 'unsigned long'), which requires 8 byte alignment 0x612000022cc6: note: pointer points here 84 a3 78 e0 8e 8d 4a a5 51 9c 57 d0 d6 41 f3 26 d1 4e e1 98 42 b5 3a 9f 04 f1 73 d2 1d bf 73 44 ^ SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior crypto/bn/rsaz_exp_x2.c:562:20 in ../../util/wrap.pl ../../fuzz/server-test ../../fuzz/corpora/server => 1 not ok 2 - Fuzzing server Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19394)
2022-10-12crypto/*: Fix various typos, repeated words, align some spelling to LDP.FdaSilvaYY
partially revamped from #16712 - fall thru -> fall through - time stamp -> timestamp - host name -> hostname - ipv6 -> IPv6 Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19059)
2022-10-12crypto: Fix various typos, repeated words, align some spelling to LDP.FdaSilvaYY
partially revamped from #16712 - fall thru -> fall through - time stamp -> timestamp - file name -> filename - host name -> hostname Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19059)
2022-10-05Stop raising ERR_R_MALLOC_FAILURE in most placesRichard Levitte
Since OPENSSL_malloc() and friends report ERR_R_MALLOC_FAILURE, and at least handle the file name and line number they are called from, there's no need to report ERR_R_MALLOC_FAILURE where they are called directly, or when SSLfatal() and RLAYERfatal() is used, the reason `ERR_R_MALLOC_FAILURE` is changed to `ERR_R_CRYPTO_LIB`. There were a number of places where `ERR_R_MALLOC_FAILURE` was reported even though it was a function from a different sub-system that was called. Those places are changed to report ERR_R_{lib}_LIB, where {lib} is the name of that sub-system. Some of them are tricky to get right, as we have a lot of functions that belong in the ASN1 sub-system, and all the `sk_` calls or from the CRYPTO sub-system. Some extra adaptation was necessary where there were custom OPENSSL_malloc() wrappers, and some bugs are fixed alongside these changes. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19301)
2022-10-04Fix error propagatation in BN_check_prime()Kazuki Yamaguchi
BN_check_prime() is supposed to return 0 for a composite number and -1 on error. Properly translate the return value of the internal function ossl_bn_miller_rabin_is_prime(), where 0 means an error. The confusion prevented BN_GENCB callbacks from aborting the primality test or key generation routines utilizing this. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19314)
2022-08-17Fix memory leak in BN_rand_range()valdaarhun
The patch enables BN_rand_range() to exit immediately if BIGNUM *rnd is NULL. CLA: trivial Fixes: #18951 Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18982)
2022-08-17Fix unrolled montgomery multiplication for POWER9Rohan McLure
In the reference C implementation in bn_asm.c, tp[num + 1] contains the carry bit for accumulations into tp[num]. tp[num + 1] is only ever assigned, never itself incremented. Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18883)
2022-08-17Revert "Revert "bn: Add fixed length (n=6), unrolled PPC Montgomery ↵Rohan McLure
Multiplication"" This reverts commit 712d9cc90e355b2c98a959d4e9398610d2269c9e. Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18883)
2022-07-05Fix bn_gcd code to check return value when calling BN_one()slontis
BN_one() uses the expand function which calls malloc which may fail. All other places that reference BN_one() check the return value. The issue is triggered by a memory allocation failure. Detected by PR #18355 Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18697)
2022-06-23rsa: fix bn_reduce_once_in_place call for rsaz_mod_exp_avx512_x2Xi Ruoyao
bn_reduce_once_in_place expects the number of BN_ULONG, but factor_size is moduli bit size. Fixes #18625. Signed-off-by: Xi Ruoyao <xry111@xry111.site> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18626)
2022-06-16Add an extra reduction step to RSAZ mod_exp implementationsTomas Mraz
Inspired by BoringSSL fix by David Benjamin. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18510)
2022-06-16Always end BN_mod_exp_mont_consttime with normal Montgomery reduction.Tomas Mraz
This partially fixes a bug where, on x86_64, BN_mod_exp_mont_consttime would sometimes return m, the modulus, when it should have returned zero. Thanks to Guido Vranken for reporting it. It is only a partial fix because the same bug also exists in the "rsaz" codepath. The bug only affects zero outputs (with non-zero inputs), so we believe it has no security impact on our cryptographic functions. The fx is to delete lowercase bn_from_montgomery altogether, and have the mont5 path use the same BN_from_montgomery ending as the non-mont5 path. This only impacts the final step of the whole exponentiation and has no measurable perf impact. See the original BoringSSL commit https://boringssl.googlesource.com/boringssl/+/13c9d5c69d04485a7a8840c12185c832026c8315 for further analysis. Original-author: David Benjamin <davidben@google.com> Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18510)
2022-06-15Revert "bn: Add fixed length (n=6), unrolled PPC Montgomery Multiplication"Tomas Mraz
This reverts commit 0d40ca47bd86e74a95c3a2f5fb6c67cdbee93c79. It was found that the computation produces incorrect results in some cases. Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18512)
2022-06-13RSA keygen update: Raise an error if no prime candidate q is found.slontis
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18429)
2022-06-13RSA keygen fixesslontis
Fixes #18321 Increase the iteration factor used when 'Computing a Probable Prime Factor Based on Auxiliary Primes' from 5 to 20. This matches the algorithm update made in FIPS 186-5. Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18429)
2022-06-13[crypto/bn] BN_consttime_swap: remove superfluous early exitBilly Brumley
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18518)
2022-05-24Rename x86-32 assembly files from .s to .S.Sebastian Andrzej Siewior
Rename x86-32 assembly files from .s to .S. While processing the .S file gcc will use the pre-processor whic will evaluate macros and ifdef. This is turn will be used to enable the endbr32 opcode based on the __CET__ define. Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18353)
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