commit 360e2c41d8211e43ed2a729e4947db6f9d050c31
author Gilles Peskine <Gilles.Peskine@arm.com> Fri Jul 24 02:03:20 2020 +0200
committer Gilles Peskine <Gilles.Peskine@arm.com> Wed Sep 30 17:02:25 2020 +0200
tree f5df7db9a84c7ea0786e0cc7f306edf2ce989dc3
parent 326e474a6de5c13fce47220a3259c2fc299dec7b

List Montgomery curves in mbedtls_ecp_curve_list()

mbedtls_ecp_curve_list() now lists Curve25519 and Curve448 under the names
"x25519" and "x448". These curves support ECDH but not ECDSA.

This was meant ever since the introduction of mbedtls_ecdsa_can_do()
in 0082f9df6f26b982f74a3301399f66ba7a6eb039, but
2c69d10bac678d0d86615de3d01b3d5bbb4b8c45 had removed the claim
that Montgomery curves support ECDH except through Everest.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

library/ecp.c

diff --git a/library/ecp.c b/library/ecp.c
index 5d00de5..05a0b01 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -546,9 +546,12 @@
 #if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
     { MBEDTLS_ECP_DP_SECP192K1,    18,     192,    "secp192k1"         },
 #endif
-#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) && defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
+#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
     { MBEDTLS_ECP_DP_CURVE25519,   29,     256,    "x25519"            },
 #endif
+#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
+    { MBEDTLS_ECP_DP_CURVE448,     30,     448,    "x448"              },
+#endif
     { MBEDTLS_ECP_DP_NONE,          0,     0,      NULL                },
 };