513 lines
19 KiB
Text
513 lines
19 KiB
Text
/* BEGIN_HEADER */
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#include "mbedtls/ecdsa.h"
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#include "legacy_or_psa.h"
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#if ( defined(MBEDTLS_ECDSA_DETERMINISTIC) && defined(MBEDTLS_SHA256_C) ) || \
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( !defined(MBEDTLS_ECDSA_DETERMINISTIC) && defined(MBEDTLS_HAS_ALG_SHA_256_VIA_LOWLEVEL_OR_PSA) )
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#define MBEDTLS_HAS_ALG_SHA_256_VIA_MD_IF_DETERMINISTIC
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#endif
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#define MBEDTLS_TEST_HASH_MAX_SIZE 64
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_ECDSA_C
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE */
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void ecdsa_prim_zero( int id )
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{
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mbedtls_ecp_group grp;
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mbedtls_ecp_point Q;
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mbedtls_mpi d, r, s;
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mbedtls_test_rnd_pseudo_info rnd_info;
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unsigned char buf[MBEDTLS_TEST_HASH_MAX_SIZE];
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mbedtls_ecp_group_init( &grp );
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mbedtls_ecp_point_init( &Q );
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mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s );
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memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
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memset( buf, 0, sizeof( buf ) );
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TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
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TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ),
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 );
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exit:
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mbedtls_ecp_group_free( &grp );
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mbedtls_ecp_point_free( &Q );
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mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdsa_prim_random( int id )
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{
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mbedtls_ecp_group grp;
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mbedtls_ecp_point Q;
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mbedtls_mpi d, r, s;
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mbedtls_test_rnd_pseudo_info rnd_info;
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unsigned char buf[MBEDTLS_TEST_HASH_MAX_SIZE];
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mbedtls_ecp_group_init( &grp );
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mbedtls_ecp_point_init( &Q );
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mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s );
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memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
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memset( buf, 0, sizeof( buf ) );
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/* prepare material for signature */
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TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info,
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buf, sizeof( buf ) ) == 0 );
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TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
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TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ),
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 );
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exit:
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mbedtls_ecp_group_free( &grp );
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mbedtls_ecp_point_free( &Q );
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mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str,
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char * yQ_str, data_t * rnd_buf,
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data_t * hash, char * r_str, char * s_str,
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int result )
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{
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mbedtls_ecp_group grp;
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mbedtls_ecp_point Q;
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mbedtls_mpi d, r, s, r_check, s_check, zero;
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mbedtls_test_rnd_buf_info rnd_info;
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mbedtls_ecp_group_init( &grp );
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mbedtls_ecp_point_init( &Q );
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mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s );
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mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check );
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mbedtls_mpi_init( &zero );
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TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
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TEST_ASSERT( mbedtls_ecp_point_read_string( &Q, 16, xQ_str, yQ_str ) == 0 );
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TEST_ASSERT( mbedtls_test_read_mpi( &d, d_str ) == 0 );
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TEST_ASSERT( mbedtls_test_read_mpi( &r_check, r_str ) == 0 );
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TEST_ASSERT( mbedtls_test_read_mpi( &s_check, s_str ) == 0 );
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rnd_info.fallback_f_rng = mbedtls_test_rnd_std_rand;
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rnd_info.fallback_p_rng = NULL;
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rnd_info.buf = rnd_buf->x;
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rnd_info.length = rnd_buf->len;
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/* Fix rnd_buf->x by shifting it left if necessary */
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if( grp.nbits % 8 != 0 )
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{
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unsigned char shift = 8 - ( grp.nbits % 8 );
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size_t i;
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for( i = 0; i < rnd_info.length - 1; i++ )
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rnd_buf->x[i] = rnd_buf->x[i] << shift | rnd_buf->x[i+1] >> ( 8 - shift );
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rnd_buf->x[rnd_info.length-1] <<= shift;
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}
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TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, hash->x, hash->len,
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mbedtls_test_rnd_buffer_rand, &rnd_info ) == result );
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if ( result == 0)
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{
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/* Check we generated the expected values */
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TEST_EQUAL( mbedtls_mpi_cmp_mpi( &r, &r_check ), 0 );
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TEST_EQUAL( mbedtls_mpi_cmp_mpi( &s, &s_check ), 0 );
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/* Valid signature */
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len,
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&Q, &r_check, &s_check ), 0 );
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/* Invalid signature: wrong public key (G instead of Q) */
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len,
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&grp.G, &r_check, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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/* Invalid signatures: r or s or both one off */
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TEST_EQUAL( mbedtls_mpi_sub_int( &r, &r_check, 1 ), 0 );
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TEST_EQUAL( mbedtls_mpi_add_int( &s, &s_check, 1 ), 0 );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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/* Invalid signatures: r, s or both (CVE-2022-21449) are zero */
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TEST_EQUAL( mbedtls_mpi_lset( &zero, 0 ), 0 );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&zero, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r_check, &zero ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&zero, &zero ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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/* Invalid signatures: r, s or both are == N */
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&grp.N, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r_check, &grp.N ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&grp.N, &grp.N ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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/* Invalid signatures: r, s or both are negative */
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TEST_EQUAL( mbedtls_mpi_sub_mpi( &r, &r_check, &grp.N ), 0 );
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TEST_EQUAL( mbedtls_mpi_sub_mpi( &s, &s_check, &grp.N ), 0 );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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/* Invalid signatures: r or s or both are > N */
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TEST_EQUAL( mbedtls_mpi_add_mpi( &r, &r_check, &grp.N ), 0 );
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TEST_EQUAL( mbedtls_mpi_add_mpi( &s, &s_check, &grp.N ), 0 );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q,
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&r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED );
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}
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exit:
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mbedtls_ecp_group_free( &grp );
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mbedtls_ecp_point_free( &Q );
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mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s );
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mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check );
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mbedtls_mpi_free( &zero );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_ECDSA_DETERMINISTIC */
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void ecdsa_det_test_vectors( int id, char * d_str, int md_alg, data_t * hash,
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char * r_str, char * s_str )
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{
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mbedtls_ecp_group grp;
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mbedtls_mpi d, r, s, r_check, s_check;
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mbedtls_ecp_group_init( &grp );
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mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s );
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mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check );
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TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
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TEST_ASSERT( mbedtls_test_read_mpi( &d, d_str ) == 0 );
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TEST_ASSERT( mbedtls_test_read_mpi( &r_check, r_str ) == 0 );
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TEST_ASSERT( mbedtls_test_read_mpi( &s_check, s_str ) == 0 );
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TEST_ASSERT(
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mbedtls_ecdsa_sign_det_ext( &grp, &r, &s, &d,
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hash->x, hash->len, md_alg,
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mbedtls_test_rnd_std_rand,
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NULL )
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== 0 );
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TEST_ASSERT( mbedtls_mpi_cmp_mpi( &r, &r_check ) == 0 );
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TEST_ASSERT( mbedtls_mpi_cmp_mpi( &s, &s_check ) == 0 );
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exit:
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mbedtls_ecp_group_free( &grp );
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mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s );
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mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_IF_DETERMINISTIC */
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void ecdsa_write_read_zero( int id )
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{
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mbedtls_ecdsa_context ctx;
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mbedtls_test_rnd_pseudo_info rnd_info;
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unsigned char hash[32];
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unsigned char sig[200];
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size_t sig_len, i;
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mbedtls_ecdsa_init( &ctx );
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memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
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memset( hash, 0, sizeof( hash ) );
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memset( sig, 0x2a, sizeof( sig ) );
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/* generate signing key */
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TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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/* generate and write signature, then read and verify it */
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TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256,
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hash, sizeof( hash ),
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sig, sizeof( sig ), &sig_len, &mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) == 0 );
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/* check we didn't write past the announced length */
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for( i = sig_len; i < sizeof( sig ); i++ )
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TEST_ASSERT( sig[i] == 0x2a );
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/* try verification with invalid length */
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len - 1 ) != 0 );
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len + 1 ) != 0 );
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/* try invalid sequence tag */
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sig[0]++;
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) != 0 );
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sig[0]--;
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/* try modifying r */
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sig[10]++;
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
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sig[10]--;
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/* try modifying s */
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sig[sig_len - 1]++;
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
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sig[sig_len - 1]--;
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exit:
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mbedtls_ecdsa_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_IF_DETERMINISTIC */
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void ecdsa_write_read_random( int id )
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{
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mbedtls_ecdsa_context ctx;
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mbedtls_test_rnd_pseudo_info rnd_info;
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unsigned char hash[32];
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unsigned char sig[200];
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size_t sig_len, i;
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mbedtls_ecdsa_init( &ctx );
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memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
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memset( hash, 0, sizeof( hash ) );
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memset( sig, 0x2a, sizeof( sig ) );
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/* prepare material for signature */
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TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info,
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hash, sizeof( hash ) ) == 0 );
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/* generate signing key */
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TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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/* generate and write signature, then read and verify it */
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TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256,
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hash, sizeof( hash ),
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sig, sizeof( sig ), &sig_len, &mbedtls_test_rnd_pseudo_rand,
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&rnd_info ) == 0 );
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) == 0 );
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/* check we didn't write past the announced length */
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for( i = sig_len; i < sizeof( sig ); i++ )
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TEST_ASSERT( sig[i] == 0x2a );
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/* try verification with invalid length */
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len - 1 ) != 0 );
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len + 1 ) != 0 );
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/* try invalid sequence tag */
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sig[0]++;
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) != 0 );
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sig[0]--;
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/* try modifying r */
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sig[10]++;
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
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sig[10]--;
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/* try modifying s */
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sig[sig_len - 1]++;
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TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
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sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
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sig[sig_len - 1]--;
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exit:
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mbedtls_ecdsa_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE */
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void ecdsa_read_restart( int id, data_t *pk, data_t *hash, data_t *sig,
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int max_ops, int min_restart, int max_restart )
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{
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mbedtls_ecdsa_context ctx;
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mbedtls_ecdsa_restart_ctx rs_ctx;
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int ret, cnt_restart;
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mbedtls_ecdsa_init( &ctx );
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mbedtls_ecdsa_restart_init( &rs_ctx );
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TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 );
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TEST_ASSERT( mbedtls_ecp_point_read_binary( &ctx.grp, &ctx.Q,
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pk->x, pk->len ) == 0 );
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mbedtls_ecp_set_max_ops( max_ops );
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cnt_restart = 0;
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do {
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ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
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hash->x, hash->len, sig->x, sig->len, &rs_ctx );
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} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
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TEST_ASSERT( ret == 0 );
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TEST_ASSERT( cnt_restart >= min_restart );
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TEST_ASSERT( cnt_restart <= max_restart );
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/* try modifying r */
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TEST_ASSERT( sig->len > 10 );
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sig->x[10]++;
|
|
do {
|
|
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
|
|
hash->x, hash->len, sig->x, sig->len, &rs_ctx );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
|
|
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED );
|
|
sig->x[10]--;
|
|
|
|
/* try modifying s */
|
|
sig->x[sig->len - 1]++;
|
|
do {
|
|
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
|
|
hash->x, hash->len, sig->x, sig->len, &rs_ctx );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
|
|
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED );
|
|
sig->x[sig->len - 1]--;
|
|
|
|
/* Do we leak memory when aborting an operation?
|
|
* This test only makes sense when we actually restart */
|
|
if( min_restart > 0 )
|
|
{
|
|
ret = mbedtls_ecdsa_read_signature_restartable( &ctx,
|
|
hash->x, hash->len, sig->x, sig->len, &rs_ctx );
|
|
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
|
|
}
|
|
|
|
exit:
|
|
mbedtls_ecdsa_free( &ctx );
|
|
mbedtls_ecdsa_restart_free( &rs_ctx );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE:MBEDTLS_ECDSA_DETERMINISTIC */
|
|
void ecdsa_write_restart( int id, char *d_str, int md_alg,
|
|
data_t *hash, data_t *sig_check,
|
|
int max_ops, int min_restart, int max_restart )
|
|
{
|
|
int ret, cnt_restart;
|
|
mbedtls_ecdsa_restart_ctx rs_ctx;
|
|
mbedtls_ecdsa_context ctx;
|
|
unsigned char sig[MBEDTLS_ECDSA_MAX_LEN];
|
|
size_t slen;
|
|
|
|
mbedtls_ecdsa_restart_init( &rs_ctx );
|
|
mbedtls_ecdsa_init( &ctx );
|
|
memset( sig, 0, sizeof( sig ) );
|
|
|
|
TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 );
|
|
TEST_ASSERT( mbedtls_test_read_mpi( &ctx.d, d_str ) == 0 );
|
|
|
|
mbedtls_ecp_set_max_ops( max_ops );
|
|
|
|
slen = sizeof( sig );
|
|
cnt_restart = 0;
|
|
do {
|
|
ret = mbedtls_ecdsa_write_signature_restartable( &ctx,
|
|
md_alg, hash->x, hash->len, sig, sizeof( sig ), &slen,
|
|
mbedtls_test_rnd_std_rand, NULL, &rs_ctx );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
|
|
|
|
TEST_ASSERT( ret == 0 );
|
|
TEST_ASSERT( slen == sig_check->len );
|
|
TEST_ASSERT( memcmp( sig, sig_check->x, slen ) == 0 );
|
|
|
|
TEST_ASSERT( cnt_restart >= min_restart );
|
|
TEST_ASSERT( cnt_restart <= max_restart );
|
|
|
|
/* Do we leak memory when aborting an operation?
|
|
* This test only makes sense when we actually restart */
|
|
if( min_restart > 0 )
|
|
{
|
|
ret = mbedtls_ecdsa_write_signature_restartable( &ctx,
|
|
md_alg, hash->x, hash->len, sig, sizeof( sig ), &slen,
|
|
mbedtls_test_rnd_std_rand, NULL, &rs_ctx );
|
|
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
|
|
}
|
|
|
|
exit:
|
|
mbedtls_ecdsa_restart_free( &rs_ctx );
|
|
mbedtls_ecdsa_free( &ctx );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void ecdsa_verify( int grp_id, char * x, char * y, char * r, char * s, data_t * content, int key_is_valid, int expected )
|
|
{
|
|
mbedtls_ecdsa_context ctx;
|
|
mbedtls_mpi sig_r, sig_s;
|
|
const mbedtls_ecp_curve_info *curve_info;
|
|
|
|
mbedtls_ecdsa_init( &ctx );
|
|
mbedtls_mpi_init( &sig_r );
|
|
mbedtls_mpi_init( &sig_s );
|
|
|
|
/* Prepare ECP group context */
|
|
curve_info = mbedtls_ecp_curve_info_from_grp_id( grp_id );
|
|
TEST_ASSERT( curve_info != NULL );
|
|
TEST_EQUAL( mbedtls_ecp_group_load( &ctx.grp, curve_info->grp_id ), 0 );
|
|
|
|
/* Prepare public key */
|
|
TEST_EQUAL( mbedtls_test_read_mpi( &ctx.Q.X, x ), 0 );
|
|
TEST_EQUAL( mbedtls_test_read_mpi( &ctx.Q.Y, y ), 0 );
|
|
TEST_EQUAL( mbedtls_mpi_lset( &ctx.Q.Z, 1 ), 0 );
|
|
|
|
/* Prepare signature R & S */
|
|
TEST_EQUAL( mbedtls_test_read_mpi( &sig_r, r ), 0 );
|
|
TEST_EQUAL( mbedtls_test_read_mpi( &sig_s, s ), 0 );
|
|
|
|
/* Test whether public key has expected validity */
|
|
TEST_EQUAL( mbedtls_ecp_check_pubkey( &ctx.grp, &ctx.Q ), key_is_valid ? 0 : MBEDTLS_ERR_ECP_INVALID_KEY );
|
|
|
|
/* Verification */
|
|
int result = mbedtls_ecdsa_verify( &ctx.grp, content->x, content->len, &ctx.Q, &sig_r, &sig_s );
|
|
|
|
TEST_EQUAL( result, expected );
|
|
|
|
if ( !key_is_valid ) {
|
|
/* Invalid public key must always fail */
|
|
TEST_ASSERT( result != 0 );
|
|
}
|
|
|
|
exit:
|
|
mbedtls_ecdsa_free( &ctx );
|
|
mbedtls_mpi_free( &sig_r );
|
|
mbedtls_mpi_free( &sig_s );
|
|
}
|
|
/* END_CASE */
|