Provide an EC method that uses homogeneous projective coordinates.

This makes use of EC_FIELD_ELEMENT to perform fixed width constant
time operations.

Addition and doubling of points makes use of the formulas from
"Complete addition formulas for prime order elliptic curves"
(https://eprint.iacr.org/2015/1060). These are complete and
operate in constant time.

Further work will continue in tree.

ok tb@

1 files changed, 2 insertions, 1 deletions

diff --git a/src/lib/libcrypto/Makefile b/src/lib/libcrypto/Makefile
index 7564001961..6adfe45e6f 100644
--- a/src/lib/libcrypto/Makefile
+++ b/src/lib/libcrypto/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.234 2025/05/25 05:12:05 jsing Exp $
+# $OpenBSD: Makefile,v 1.235 2025/05/25 05:19:26 jsing Exp $
 
 LIB=    crypto
 LIBREBUILD=y
@@ -289,6 +289,7 @@ SRCS+= ec_lib.c
 SRCS+= ec_mult.c
 SRCS+= ec_pmeth.c
 SRCS+= eck_prn.c
+SRCS+= ecp_hp_methods.c
 SRCS+= ecp_methods.c
 SRCS+= ecx_methods.c