upstream: Add support for a PQC KEX/KEM:

sntrup4591761x25519-sha512@tinyssh.org using the Streamlined NTRU Prime
4591^761 implementation from SUPERCOP coupled with X25519 as a stop-loss. Not
enabled by default.

introduce KEM API; a simplified framework for DH-ish KEX methods.

from markus@ feedback & ok djm@

OpenBSD-Commit-ID: d687f76cffd3561dd73eb302d17a1c3bf321d1a7

1 files changed, 2 insertions, 0 deletions

diff --git a/Makefile.in b/Makefile.in
index 7b5de6039..2b22e9f47 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -100,8 +100,10 @@ LIBSSH_OBJS=${LIBOPENSSH_OBJS} \
         kex.o kexdh.o kexgex.o kexecdh.o kexc25519.o \
         kexdhc.o kexgexc.o kexecdhc.o kexc25519c.o \
         kexdhs.o kexgexs.o kexecdhs.o kexc25519s.o \
+        sntrup4591761.o kexsntrup4591761x25519.o kexkemc.o kexkems.o \
         platform-pledge.o platform-tracing.o platform-misc.o
 
+
 SSHOBJS= ssh.o readconf.o clientloop.o sshtty.o \
         sshconnect.o sshconnect2.o mux.o