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Improve readability and relevance of values

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Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Manuel Pégourié-Gonnard 2022-04-21 09:25:23 +02:00
parent bcaba030ec
commit 5aeb61ccb4
1 changed files with 22 additions and 24 deletions
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46
tests/suites/test_suite_ecdsa.function
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@ -279,13 +279,14 @@ void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str,
{
mbedtls_ecp_group grp;
mbedtls_ecp_point Q;
mbedtls_mpi d, r, s, r_check, s_check;
mbedtls_mpi d, r, s, r_check, s_check, zero;
mbedtls_test_rnd_buf_info rnd_info;
mbedtls_ecp_group_init( &grp );
mbedtls_ecp_point_init( &Q );
mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s );
mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check );
mbedtls_mpi_init( &zero );
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
TEST_ASSERT( mbedtls_ecp_point_read_string( &Q, 16, xQ_str, yQ_str ) == 0 );
@ -314,7 +315,7 @@ void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str,
if ( result == 0)
{
/* save correct values; we'll generate incorrect ones below */
/* Check we generated the expected values */
TEST_EQUAL( mbedtls_mpi_cmp_mpi( &r, &r_check ), 0 );
TEST_EQUAL( mbedtls_mpi_cmp_mpi( &s, &s_check ), 0 );
@ -327,8 +328,8 @@ void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str,
&grp.G, &r_check, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
/* Invalid signatures: r or s or both one off */
TEST_EQUAL( mbedtls_mpi_sub_int( &r, &r, 1 ), 0 );
TEST_EQUAL( mbedtls_mpi_add_int( &s, &s, 1 ), 0 );
TEST_EQUAL( mbedtls_mpi_sub_int( &r, &r_check, 1 ), 0 );
TEST_EQUAL( mbedtls_mpi_add_int( &s, &s_check, 1 ), 0 );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
@ -338,30 +339,26 @@ void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str,
&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
/* Invalid signatures: r, s or both (CVE-2022-21449) are zero */
TEST_EQUAL( mbedtls_mpi_lset( &r, 0 ), 0 );
TEST_EQUAL( mbedtls_mpi_lset( &s, 0 ), 0 );
TEST_EQUAL( mbedtls_mpi_lset( &zero, 0 ), 0 );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
&zero, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
&r_check, &zero ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
/* Invalid signatures: r, s or both are negative */
TEST_EQUAL( mbedtls_mpi_lset( &r, -1 ), 0 );
TEST_EQUAL( mbedtls_mpi_lset( &s, -1 ), 0 );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
&zero, &zero ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
/* Invalid signatures: r, s or both are == N */
TEST_EQUAL( mbedtls_mpi_copy( &r, &grp.N ), 0 );
TEST_EQUAL( mbedtls_mpi_copy( &s, &grp.N ), 0 );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&grp.N, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r_check, &grp.N ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&grp.N, &grp.N ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
/* Invalid signatures: r, s or both are negative */
TEST_EQUAL( mbedtls_mpi_sub_mpi( &r, &r_check, &grp.N ), 0 );
TEST_EQUAL( mbedtls_mpi_sub_mpi( &s, &s_check, &grp.N ), 0 );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
@ -371,8 +368,8 @@ void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str,
&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
/* Invalid signatures: r or s or both are > N */
TEST_EQUAL( mbedtls_mpi_add_int( &r, &grp.N, 1 ), 0 );
TEST_EQUAL( mbedtls_mpi_add_int( &s, &grp.N, 1 ), 0 );
TEST_EQUAL( mbedtls_mpi_add_mpi( &r, &r_check, &grp.N ), 0 );
TEST_EQUAL( mbedtls_mpi_add_mpi( &s, &s_check, &grp.N ), 0 );
TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
@ -387,6 +384,7 @@ exit:
mbedtls_ecp_point_free( &Q );
mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s );
mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check );
mbedtls_mpi_free( &zero );
}
/* END_CASE */