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Fix ecp_check_pub() test cases

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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>
This commit is contained in:
Janos Follath 2021-06-25 12:28:49 +01:00
parent be89c357ae
commit 51ccd62a08
1 changed files with 2 additions and 2 deletions
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4
tests/suites/test_suite_ecp.data
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@ -58,7 +58,7 @@ ecp_check_pub:MBEDTLS_ECP_DP_CURVE25519:"2":"0":"2":MBEDTLS_ERR_ECP_INVALID_KEY
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
@ -142,7 +142,7 @@ ecp_check_pub:MBEDTLS_ECP_DP_CURVE448:"2":"0":"2":MBEDTLS_ERR_ECP_INVALID_KEY
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