security: enforce structural validation in RNS deserialization#59
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mausamrijal wants to merge 1 commit intogoogle:masterfrom
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security: enforce structural validation in RNS deserialization#59mausamrijal wants to merge 1 commit intogoogle:masterfrom
mausamrijal wants to merge 1 commit intogoogle:masterfrom
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This PR implements defensive validation checks during the deserialization of RNS cryptographic objects.
Changes:
RnsRlweCiphertext: Added check to ensure components is not empty, preventing null-pointer/OOB access in LogN().
RnsGaloisKey: Added dimension validation against the gadget parameters to prevent OOB access during key-switching loops.
RnsPolynomial: Added range validation for log_n to prevent undefined behavior from unsafe bit-shifts.
These patches ensure the library returns absl::InvalidArgumentError instead of crashing when encountering malformed serialized inputs. Verified with the included Python PoC.