Fix ecp_check_pub() test cases
Negative x coordinate was tested with the value -1. It happens to be one
of the low order points both for Curve25519 and Curve448 and might be
rejected because of that and not because it is negative. Make sure that
x < 0 is the only plausible reason for the point to be rejected.
Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/tests/suites/test_suite_ecp.data b/tests/suites/test_suite_ecp.data
index 2916fa3..ceafc79 100644
--- a/tests/suites/test_suite_ecp.data
+++ b/tests/suites/test_suite_ecp.data
@@ -55,7 +55,7 @@
ECP check pubkey Curve25519 x negative
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-ecp_check_pub:MBEDTLS_ECP_DP_CURVE25519:"-1":"0":"1":MBEDTLS_ERR_ECP_INVALID_KEY
+ecp_check_pub:MBEDTLS_ECP_DP_CURVE25519:"-2":"0":"1":MBEDTLS_ERR_ECP_INVALID_KEY
# see https://cr.yp.to/ecdh.html#validate
ECP check pubkey Curve25519 low-order point #1
@@ -139,7 +139,7 @@
ECP check pubkey Curve448 x negative
depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
-ecp_check_pub:MBEDTLS_ECP_DP_CURVE448:"-1":"0":"1":MBEDTLS_ERR_ECP_INVALID_KEY
+ecp_check_pub:MBEDTLS_ECP_DP_CURVE448:"-2":"0":"1":MBEDTLS_ERR_ECP_INVALID_KEY
ECP check pubkey Curve448 low-order point #1
depends_on:MBEDTLS_ECP_DP_CURVE448_ENABLED
