| /* BEGIN_HEADER */ |
| #include "mbedtls/ecdh.h" |
| |
| static int load_public_key( int grp_id, const char *point_str, |
| mbedtls_ecp_keypair *ecp ) |
| { |
| int ok = 0; |
| unsigned char point_buf[MBEDTLS_ECP_MAX_PT_LEN]; |
| size_t point_len = unhexify( point_buf, point_str ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &ecp->grp, grp_id ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_point_read_binary( &ecp->grp, |
| &ecp->Q, |
| point_buf, |
| point_len ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_check_pubkey( &ecp->grp, |
| &ecp->Q ) == 0 ); |
| ok = 1; |
| exit: |
| return( ok ); |
| } |
| |
| static int load_private_key( int grp_id, const char *private_key_str, |
| mbedtls_ecp_keypair *ecp, |
| rnd_pseudo_info *rnd_info ) |
| { |
| int ok = 0; |
| unsigned char private_key_buf[MBEDTLS_ECP_MAX_BYTES]; |
| size_t private_key_len = unhexify( private_key_buf, private_key_str ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &ecp->grp, grp_id ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_binary( &ecp->d, |
| private_key_buf, |
| private_key_len ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_check_privkey( &ecp->grp, &ecp->d ) == 0 ); |
| /* Calculate the public key from the private key. */ |
| TEST_ASSERT( mbedtls_ecp_mul( &ecp->grp, &ecp->Q, &ecp->d, |
| &ecp->grp.G, |
| &rnd_pseudo_rand, rnd_info ) == 0 ); |
| ok = 1; |
| exit: |
| return( ok ); |
| } |
| |
| /* END_HEADER */ |
| |
| /* BEGIN_DEPENDENCIES |
| * depends_on:MBEDTLS_ECDH_C |
| * END_DEPENDENCIES |
| */ |
| |
| /* BEGIN_CASE */ |
| void ecdh_primitive_random( int id ) |
| { |
| mbedtls_ecp_group grp; |
| mbedtls_ecp_point qA, qB; |
| mbedtls_mpi dA, dB, zA, zB; |
| rnd_pseudo_info rnd_info; |
| |
| mbedtls_ecp_group_init( &grp ); |
| mbedtls_ecp_point_init( &qA ); mbedtls_ecp_point_init( &qB ); |
| mbedtls_mpi_init( &dA ); mbedtls_mpi_init( &dB ); |
| mbedtls_mpi_init( &zA ); mbedtls_mpi_init( &zB ); |
| memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dA, &qA, &rnd_pseudo_rand, &rnd_info ) |
| == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dB, &qB, &rnd_pseudo_rand, &rnd_info ) |
| == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zA, &qB, &dA, |
| &rnd_pseudo_rand, &rnd_info ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zB, &qA, &dB, |
| NULL, NULL ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zA, &zB ) == 0 ); |
| |
| exit: |
| mbedtls_ecp_group_free( &grp ); |
| mbedtls_ecp_point_free( &qA ); mbedtls_ecp_point_free( &qB ); |
| mbedtls_mpi_free( &dA ); mbedtls_mpi_free( &dB ); |
| mbedtls_mpi_free( &zA ); mbedtls_mpi_free( &zB ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ecdh_primitive_testvec( int id, char *dA_str, char *xA_str, char *yA_str, |
| char *dB_str, char *xB_str, char *yB_str, |
| char *z_str ) |
| { |
| mbedtls_ecp_group grp; |
| mbedtls_ecp_point qA, qB; |
| mbedtls_mpi dA, dB, zA, zB, check; |
| unsigned char rnd_buf_A[MBEDTLS_ECP_MAX_BYTES]; |
| unsigned char rnd_buf_B[MBEDTLS_ECP_MAX_BYTES]; |
| rnd_buf_info rnd_info_A, rnd_info_B; |
| |
| mbedtls_ecp_group_init( &grp ); |
| mbedtls_ecp_point_init( &qA ); mbedtls_ecp_point_init( &qB ); |
| mbedtls_mpi_init( &dA ); mbedtls_mpi_init( &dB ); |
| mbedtls_mpi_init( &zA ); mbedtls_mpi_init( &zB ); mbedtls_mpi_init( &check ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); |
| |
| rnd_info_A.buf = rnd_buf_A; |
| rnd_info_A.length = unhexify( rnd_buf_A, dA_str ); |
| |
| /* Fix rnd_buf_A by shifting it left if necessary */ |
| if( grp.nbits % 8 != 0 ) |
| { |
| unsigned char shift = 8 - ( grp.nbits % 8 ); |
| size_t i; |
| |
| for( i = 0; i < rnd_info_A.length - 1; i++ ) |
| rnd_buf_A[i] = rnd_buf_A[i] << shift |
| | rnd_buf_A[i+1] >> ( 8 - shift ); |
| |
| rnd_buf_A[rnd_info_A.length-1] <<= shift; |
| } |
| |
| rnd_info_B.buf = rnd_buf_B; |
| rnd_info_B.length = unhexify( rnd_buf_B, dB_str ); |
| |
| /* Fix rnd_buf_B by shifting it left if necessary */ |
| if( grp.nbits % 8 != 0 ) |
| { |
| unsigned char shift = 8 - ( grp.nbits % 8 ); |
| size_t i; |
| |
| for( i = 0; i < rnd_info_B.length - 1; i++ ) |
| rnd_buf_B[i] = rnd_buf_B[i] << shift |
| | rnd_buf_B[i+1] >> ( 8 - shift ); |
| |
| rnd_buf_B[rnd_info_B.length-1] <<= shift; |
| } |
| |
| TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dA, &qA, |
| rnd_buffer_rand, &rnd_info_A ) == 0 ); |
| TEST_ASSERT( ! mbedtls_ecp_is_zero( &qA ) ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, xA_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qA.X, &check ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, yA_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qA.Y, &check ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dB, &qB, |
| rnd_buffer_rand, &rnd_info_B ) == 0 ); |
| TEST_ASSERT( ! mbedtls_ecp_is_zero( &qB ) ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, xB_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qB.X, &check ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, yB_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qB.Y, &check ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, z_str ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zA, &qB, &dA, NULL, NULL ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zA, &check ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zB, &qA, &dB, NULL, NULL ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zB, &check ) == 0 ); |
| |
| exit: |
| mbedtls_ecp_group_free( &grp ); |
| mbedtls_ecp_point_free( &qA ); mbedtls_ecp_point_free( &qB ); |
| mbedtls_mpi_free( &dA ); mbedtls_mpi_free( &dB ); |
| mbedtls_mpi_free( &zA ); mbedtls_mpi_free( &zB ); mbedtls_mpi_free( &check ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ecdh_exchange( int id ) |
| { |
| mbedtls_ecdh_context srv, cli; |
| unsigned char buf[1000]; |
| const unsigned char *vbuf; |
| size_t len; |
| rnd_pseudo_info rnd_info; |
| mbedtls_ecdh_init( &srv ); |
| mbedtls_ecdh_init( &cli ); |
| memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &srv.grp, id ) == 0 ); |
| |
| memset( buf, 0x00, sizeof( buf ) ); vbuf = buf; |
| TEST_ASSERT( mbedtls_ecdh_make_params( &srv, &len, buf, 1000, |
| &rnd_pseudo_rand, &rnd_info ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_read_params( &cli, &vbuf, buf + len ) == 0 ); |
| |
| memset( buf, 0x00, sizeof( buf ) ); |
| TEST_ASSERT( mbedtls_ecdh_make_public( &cli, &len, buf, 1000, |
| &rnd_pseudo_rand, &rnd_info ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_read_public( &srv, buf, len ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_ecdh_calc_secret( &srv, &len, buf, 1000, |
| &rnd_pseudo_rand, &rnd_info ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_calc_secret( &cli, &len, buf, 1000, NULL, NULL ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &srv.z, &cli.z ) == 0 ); |
| |
| exit: |
| mbedtls_ecdh_free( &srv ); |
| mbedtls_ecdh_free( &cli ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ecdh_exchange_calc_secret( int grp_id, |
| char *our_private_key, |
| char *their_point, |
| int ours_first, |
| char *expected_str ) |
| { |
| rnd_pseudo_info rnd_info; |
| unsigned char expected_buf[MBEDTLS_ECP_MAX_BYTES]; |
| size_t expected_len; |
| mbedtls_ecp_keypair our_key; |
| mbedtls_ecp_keypair their_key; |
| mbedtls_ecdh_context ecdh; |
| unsigned char shared_secret[MBEDTLS_ECP_MAX_BYTES]; |
| size_t shared_secret_length = 0; |
| |
| memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) ); |
| mbedtls_ecdh_init( &ecdh ); |
| mbedtls_ecp_keypair_init( &our_key ); |
| mbedtls_ecp_keypair_init( &their_key ); |
| |
| expected_len = unhexify( expected_buf, expected_str ); |
| |
| if( ! load_private_key( grp_id, our_private_key, &our_key, &rnd_info ) ) |
| goto exit; |
| if( ! load_public_key( grp_id, their_point, &their_key ) ) |
| goto exit; |
| |
| /* Import the keys to the ECDH calculation. */ |
| if( ours_first ) |
| { |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &our_key, MBEDTLS_ECDH_OURS ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) == 0 ); |
| } |
| else |
| { |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &our_key, MBEDTLS_ECDH_OURS ) == 0 ); |
| } |
| |
| /* Perform the ECDH calculation. */ |
| TEST_ASSERT( mbedtls_ecdh_calc_secret( |
| &ecdh, |
| &shared_secret_length, |
| shared_secret, sizeof( shared_secret ), |
| &rnd_pseudo_rand, &rnd_info ) == 0 ); |
| TEST_ASSERT( shared_secret_length == expected_len ); |
| TEST_ASSERT( memcmp( expected_buf, shared_secret, |
| shared_secret_length ) == 0 ); |
| |
| exit: |
| mbedtls_ecdh_free( &ecdh ); |
| mbedtls_ecp_keypair_free( &our_key ); |
| mbedtls_ecp_keypair_free( &their_key ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ecdh_exchange_get_params_fail( int our_grp_id, |
| char *our_private_key, |
| int their_grp_id, |
| char *their_point, |
| int ours_first, |
| int expected_ret ) |
| { |
| rnd_pseudo_info rnd_info; |
| mbedtls_ecp_keypair our_key; |
| mbedtls_ecp_keypair their_key; |
| mbedtls_ecdh_context ecdh; |
| |
| memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) ); |
| mbedtls_ecdh_init( &ecdh ); |
| mbedtls_ecp_keypair_init( &our_key ); |
| mbedtls_ecp_keypair_init( &their_key ); |
| |
| if( ! load_private_key( our_grp_id, our_private_key, &our_key, &rnd_info ) ) |
| goto exit; |
| if( ! load_public_key( their_grp_id, their_point, &their_key ) ) |
| goto exit; |
| |
| if( ours_first ) |
| { |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &our_key, MBEDTLS_ECDH_OURS ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) == |
| expected_ret ); |
| } |
| else |
| { |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdh_get_params( |
| &ecdh, &our_key, MBEDTLS_ECDH_OURS ) == |
| expected_ret ); |
| } |
| |
| exit: |
| mbedtls_ecdh_free( &ecdh ); |
| mbedtls_ecp_keypair_free( &our_key ); |
| mbedtls_ecp_keypair_free( &their_key ); |
| } |
| /* END_CASE */ |
