Cherry-pick to earlgrey_1.0.0: [crypto] Harden RSA modexp subroutine. #25710
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Add some SCA hardening measures to the modexp subroutine that selects either the squared or squared-and-multiplied result in square-and-multiply-always modular exponentiation. Although the rest of the code is not hardened, the hardening for RSA will likely preserve this subroutine, so hardening it is still useful. Signed-off-by: Jade Philipoom <jadep@zerorisc.com> (cherry picked from commit 8c63830)
vogelpi
approved these changes
Dec 27, 2024
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This is an automatic cherry-pick of #25694 to branch
earlgrey_1.0.0.