ecc: Improve Montgomery curve implementation.
e61300345060Unpublished
Actions

Unpublished Commit · Learn More

Not On Permanent Ref: This commit is not an ancestor of any permanent ref.

Description

ecc: Improve Montgomery curve implementation.

* cipher/ecc-curves.c (_gcry_ecc_fill_in_curve): Support
MPI_EC_MONTGOMERY.
* cipher/ecc.c (test_ecdh_only_keys): New.
(nist_generate_key): Call test_ecdh_only_keys for MPI_EC_MONTGOMERY.
(check_secret_key): Handle Montgomery curve of x-coordinate only.
* mpi/ec.c (_gcry_mpi_ec_mul_point): Resize points before the loop.
Simplify, using pointers of Q1, Q2, PRD, and SUM.