tree 134fd7dcff8c48ac012471c262292f7aa53e2f5a
parent 6a57f9219519a2fb52c45ff6706e36de4735aee0
author Adam Langley <agl@chromium.org> 1403290800 -0700
committer Adam Langley <agl@chromium.org> 1403295460 -0700

bignum: fix boundary condition in montgomery logic

It's not clear whether this inconsistency could lead to an actual
computation error, but it involved a BIGNUM being passed around the
montgomery logic in an inconsistent state. This was found using flags
-DBN_DEBUG -DBN_DEBUG_RAND, and working backwards from this assertion
in 'ectest';

ectest: bn_mul.c:960: BN_mul: Assertion `(_bnum2->top == 0) ||
(_bnum2->d[_bnum2->top - 1] != 0)' failed

(Imported from upstream's 3cc546a3bbcbf26cd14fc45fb133d36820ed0a75)