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Workaround for RSA on AArch64 Big Endian

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1064616012 introduced and optimized RSA NEON implementation
for AArch64 architecture, namely Cortex-A72 and Neoverse N1.
This implementation is broken in Big Endian mode, which is not
widely used, therefore not properly verified.
Here we disable this optimized implementation when Big Endian
platform is used.

Fixes: #22687

CLA: trivial

Signed-off-by: Nikolay Nikolaev <nicknickolaev@gmail.com>

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/26257)
This commit is contained in:
Nikolay Nikolaev 2024-12-24 13:26:09 +02:00 committed by Tomas Mraz
parent 0b1d3ebb70
commit b26894ec69
1 changed files with 2 additions and 0 deletions
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2
crypto/bn/asm/armv8-mont.pl
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@ -85,10 +85,12 @@ bn_mul_mont:
cmp $num,#32
b.le .Lscalar_impl
#ifndef __KERNEL__
#ifndef __AARCH64EB__
adrp x17,OPENSSL_armv8_rsa_neonized
ldr w17,[x17,#:lo12:OPENSSL_armv8_rsa_neonized]
cbnz w17, bn_mul8x_mont_neon
#endif
#endif
.Lscalar_impl:
tst $num,#7