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Sanity check on elliptic curve keys: check that the group is known

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This commit is contained in:
Gilles Peskine
2020-02-25 19:52:44 +01:00
parent 8d36696e1f
commit f02b984f86
2 changed files with 21 additions and 11 deletions
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13
programs/fuzz/fuzz_privkey.c
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@ -46,12 +46,15 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
#if defined(MBEDTLS_ECP_C)
if( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_ECKEY )
{
mbedtls_ecp_keypair *ecp;
mbedtls_ecp_keypair *ecp = mbedtls_pk_ec( pk );
mbedtls_ecp_group_id grp_id = ecp->grp.id;
const mbedtls_ecp_curve_info *curve_info =
mbedtls_ecp_curve_info_from_grp_id( grp_id );
ecp = mbedtls_pk_ec( pk );
if (ecp) {
ret = 0;
}
/* If the curve is not supported, the key should not have been
* accepted. */
if( curve_info == NULL )
abort( );
}
else
#endif