A mirror of https://github.com/libressl/openbsd.git https://git.lua4.win/openbsd/atom?h=OPENBSD_7_9 2025-05-25T04:30:55+00:00 2025-05-25T04:30:55+00:00 jsing 2025-05-25T04:30:55+00:00 urn:sha1:cbdbb6515eba8411eeb6f22618e029f1a461aa60 Move bn_add_words() and bn_sub_words() from bn_add.c to bn_add_sub.c. These have effectively been replaced in the previous rewrites. Remove the asserts - if bad lengths are passed the results will be incorrect and things will fail (these should use size_t instead of int, but that is a problem for another day). Provide bn_sub_words_borrow(), which computes a subtraction but only returns the resulting borrow. Provide bn_add_words_masked() and bn_sub_words_masked(), which perform an masked addition or subtraction. These can also be used to implement constant time addition and subtraction, especially for reduction. ok beck@ tb@