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Add test for ecdsa_read_signature_restartable()

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Test values taken from a random signature as generated in
ecdsa_write_read_random() test function
This commit is contained in:
Manuel Pégourié-Gonnard
2017-04-21 11:04:47 +02:00
parent 32aa4375cc
commit 722e5156fd
4 changed files with 68 additions and 3 deletions
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62
tests/suites/test_suite_ecdsa.function
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@@ -202,3 +202,65 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE */
void ecdsa_read_restart( int id, char *k_str, char *h_str, char *s_str,
int max_ops, int min_restart, int max_restart )
{
mbedtls_ecdsa_context ctx;
mbedtls_ecdsa_restart_ctx rs_ctx;
unsigned char hash[64];
unsigned char sig[200];
unsigned char pk[65];
size_t sig_len, hash_len, pk_len;
int ret, cnt_restart;
mbedtls_ecdsa_init( &ctx );
mbedtls_ecdsa_restart_init( &rs_ctx );
hash_len = unhexify(hash, h_str);
sig_len = unhexify(sig, s_str);
pk_len = unhexify(pk, k_str);
TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 );
TEST_ASSERT( mbedtls_ecp_point_read_binary( &ctx.grp, &ctx.Q, pk, pk_len ) == 0 );
mbedtls_ecp_set_max_ops( max_ops );
cnt_restart = 0;
do {
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
hash, hash_len, sig, sig_len, &rs_ctx );
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
TEST_ASSERT( ret == 0 );
TEST_ASSERT( cnt_restart >= min_restart );
TEST_ASSERT( cnt_restart <= max_restart );
/* try modifying r */
sig[10]++;
do {
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
hash, hash_len, sig, sig_len, &rs_ctx );
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[10]--;
/* try modifying s */
sig[sig_len - 1]++;
do {
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
hash, hash_len, sig, sig_len, &rs_ctx );
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[sig_len - 1]--;
/* do we leak memory when aborting? */
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
hash, hash_len, sig, sig_len, &rs_ctx );
TEST_ASSERT( ret == 0 || ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
exit:
mbedtls_ecdsa_free( &ctx );
mbedtls_ecdsa_restart_free( &rs_ctx );
}
/* END_CASE */