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I've moved it from mpunsafe.c into the main mpint.c, and renamed it mp_mod_known_integer, because now it manages to avoid leaking information about the mp_int you give it. It can still potentially leak information about the small _modulus_ integer - hence the word 'known' in the new function name. This won't be a problem in any existing use of the function, because it's used during prime generation to check divisibility by all the small primes, and optionally also check for residue 1 mod the RSA public exponent. But all those values are well known and not secret. This removes one source of side-channel leakage from prime generation.
This is the README for PuTTY, a free Windows and Unix Telnet and SSH
client.
PuTTY is built using CMake <https://cmake.org/>. To compile in the
simplest way (on any of Linux, Windows or Mac), run these commands in
the source directory:
cmake .
cmake --build .
Documentation (in various formats including Windows Help and Unix
`man' pages) is built from the Halibut (`.but') files in the `doc'
subdirectory using `doc/Makefile'. If you aren't using one of our
source snapshots, you'll need to do this yourself. Halibut can be
found at <https://www.chiark.greenend.org.uk/~sgtatham/halibut/>.
The PuTTY home web site is
https://www.chiark.greenend.org.uk/~sgtatham/putty/
If you want to send bug reports or feature requests, please read the
Feedback section of the web site before doing so. Sending one-line
reports saying `it doesn't work' will waste your time as much as
ours.
See the file LICENCE for the licence conditions.