| /* BEGIN_HEADER */ |
| #include "mbedtls/ecdsa.h" |
| /* END_HEADER */ |
| |
| /* BEGIN_DEPENDENCIES |
| * depends_on:MBEDTLS_ECDSA_C |
| * END_DEPENDENCIES |
| */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */ |
| void ecdsa_invalid_param( ) |
| { |
| mbedtls_ecdsa_context ctx; |
| mbedtls_ecp_keypair key; |
| mbedtls_ecp_group grp; |
| mbedtls_ecp_group_id valid_group = MBEDTLS_ECP_DP_SECP192R1; |
| mbedtls_ecp_point P; |
| mbedtls_md_type_t valid_md = MBEDTLS_MD_SHA256; |
| mbedtls_mpi m; |
| size_t slen; |
| unsigned char buf[42] = { 0 }; |
| |
| TEST_INVALID_PARAM( mbedtls_ecdsa_init( NULL ) ); |
| TEST_VALID_PARAM( mbedtls_ecdsa_free( NULL ) ); |
| |
| #if defined(MBEDTLS_ECP_RESTARTABLE) |
| TEST_INVALID_PARAM( mbedtls_ecdsa_restart_init( NULL ) ); |
| TEST_VALID_PARAM( mbedtls_ecdsa_restart_free( NULL ) ); |
| #endif /* MBEDTLS_ECP_RESTARTABLE */ |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign( NULL, &m, &m, &m, |
| buf, sizeof( buf ), |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign( &grp, NULL, &m, &m, |
| buf, sizeof( buf ), |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign( &grp, &m, NULL, &m, |
| buf, sizeof( buf ), |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign( &grp, &m, &m, NULL, |
| buf, sizeof( buf ), |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign( &grp, &m, &m, &m, |
| NULL, sizeof( buf ), |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign( &grp, &m, &m, &m, |
| buf, sizeof( buf ), |
| NULL, NULL ) ); |
| |
| #if defined(MBEDTLS_ECDSA_DETERMINISTIC) |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign_det_ext( NULL, &m, &m, &m, |
| buf, sizeof( buf ), |
| valid_md, |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign_det_ext( &grp, NULL, &m, &m, |
| buf, sizeof( buf ), |
| valid_md, |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign_det_ext( &grp, &m, NULL, &m, |
| buf, sizeof( buf ), |
| valid_md, |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign_det_ext( &grp, &m, &m, NULL, |
| buf, sizeof( buf ), |
| valid_md, |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_sign_det_ext( &grp, &m, &m, &m, |
| NULL, sizeof( buf ), |
| valid_md, |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| #endif /* MBEDTLS_ECDSA_DETERMINISTIC */ |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_verify( NULL, |
| buf, sizeof( buf ), |
| &P, &m, &m ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_verify( &grp, |
| NULL, sizeof( buf ), |
| &P, &m, &m ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_verify( &grp, |
| buf, sizeof( buf ), |
| NULL, &m, &m ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_verify( &grp, |
| buf, sizeof( buf ), |
| &P, NULL, &m ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_verify( &grp, |
| buf, sizeof( buf ), |
| &P, &m, NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature( NULL, valid_md, buf, sizeof( buf ), |
| buf, &slen, mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature( &ctx, valid_md, NULL, sizeof( buf ), |
| buf, &slen, mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature( &ctx, valid_md, buf, sizeof( buf ), |
| NULL, &slen, mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature( &ctx, valid_md, buf, sizeof( buf ), |
| buf, NULL, mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature_restartable( NULL, valid_md, buf, |
| sizeof( buf ), buf, &slen, |
| mbedtls_test_rnd_std_rand, |
| NULL, NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature_restartable( &ctx, valid_md, NULL, |
| sizeof( buf ), buf, &slen, |
| mbedtls_test_rnd_std_rand, |
| NULL, NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature_restartable( &ctx, valid_md, buf, |
| sizeof( buf ), NULL, &slen, |
| mbedtls_test_rnd_std_rand, |
| NULL, NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_write_signature_restartable( &ctx, valid_md, buf, |
| sizeof( buf ), buf, NULL, |
| mbedtls_test_rnd_std_rand, |
| NULL, NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_read_signature( NULL, |
| buf, sizeof( buf ), |
| buf, sizeof( buf ) ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_read_signature( &ctx, |
| NULL, sizeof( buf ), |
| buf, sizeof( buf ) ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_read_signature( &ctx, |
| buf, sizeof( buf ), |
| NULL, sizeof( buf ) ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_read_signature_restartable( NULL, |
| buf, sizeof( buf ), |
| buf, sizeof( buf ), |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_read_signature_restartable( &ctx, |
| NULL, sizeof( buf ), |
| buf, sizeof( buf ), |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_read_signature_restartable( &ctx, |
| buf, sizeof( buf ), |
| NULL, sizeof( buf ), |
| NULL ) ); |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_genkey( NULL, valid_group, |
| mbedtls_test_rnd_std_rand, |
| NULL ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_genkey( &ctx, valid_group, |
| NULL, NULL ) ); |
| |
| |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_from_keypair( NULL, &key ) ); |
| TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ECP_BAD_INPUT_DATA, |
| mbedtls_ecdsa_from_keypair( &ctx, NULL ) ); |
| |
| exit: |
| return; |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ecdsa_prim_random( int id ) |
| { |
| mbedtls_ecp_group grp; |
| mbedtls_ecp_point Q; |
| mbedtls_mpi d, r, s; |
| mbedtls_test_rnd_pseudo_info rnd_info; |
| unsigned char buf[MBEDTLS_MD_MAX_SIZE]; |
| |
| mbedtls_ecp_group_init( &grp ); |
| mbedtls_ecp_point_init( &Q ); |
| mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); |
| memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) ); |
| memset( buf, 0, sizeof( buf ) ); |
| |
| /* prepare material for signature */ |
| TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info, |
| buf, sizeof( buf ) ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q, |
| &mbedtls_test_rnd_pseudo_rand, |
| &rnd_info ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ), |
| &mbedtls_test_rnd_pseudo_rand, |
| &rnd_info ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 ); |
| |
| exit: |
| mbedtls_ecp_group_free( &grp ); |
| mbedtls_ecp_point_free( &Q ); |
| mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str, |
| char * yQ_str, data_t * rnd_buf, |
| data_t * hash, char * r_str, char * s_str, |
| int result ) |
| { |
| mbedtls_ecp_group grp; |
| mbedtls_ecp_point Q; |
| mbedtls_mpi d, r, s, r_check, s_check; |
| 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 ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_point_read_string( &Q, 16, xQ_str, yQ_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &d, 16, d_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &r_check, 16, r_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &s_check, 16, s_str ) == 0 ); |
| rnd_info.buf = rnd_buf->x; |
| rnd_info.length = rnd_buf->len; |
| |
| /* Fix rnd_buf->x 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.length - 1; i++ ) |
| rnd_buf->x[i] = rnd_buf->x[i] << shift | rnd_buf->x[i+1] >> ( 8 - shift ); |
| |
| rnd_buf->x[rnd_info.length-1] <<= shift; |
| } |
| |
| TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, hash->x, hash->len, |
| mbedtls_test_rnd_buffer_rand, &rnd_info ) == result ); |
| |
| if ( result == 0) |
| { |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &r, &r_check ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &s, &s_check ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, &r_check, &s_check ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_mpi_sub_int( &r, &r, 1 ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_add_int( &s, &s, 1 ) == 0 ); |
| |
| TEST_ASSERT( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, |
| &Q, &r, &s_check ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); |
| TEST_ASSERT( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, |
| &Q, &r_check, &s ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); |
| TEST_ASSERT( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, |
| &grp.G, &r_check, &s_check ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); |
| } |
| |
| exit: |
| mbedtls_ecp_group_free( &grp ); |
| 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 ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_ECDSA_DETERMINISTIC */ |
| void ecdsa_det_test_vectors( int id, char * d_str, int md_alg, char * msg, |
| char * r_str, char * s_str ) |
| { |
| mbedtls_ecp_group grp; |
| mbedtls_mpi d, r, s, r_check, s_check; |
| unsigned char hash[MBEDTLS_MD_MAX_SIZE]; |
| size_t hlen; |
| const mbedtls_md_info_t *md_info; |
| |
| mbedtls_ecp_group_init( &grp ); |
| mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); |
| mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check ); |
| memset( hash, 0, sizeof( hash ) ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &d, 16, d_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &r_check, 16, r_str ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &s_check, 16, s_str ) == 0 ); |
| |
| md_info = mbedtls_md_info_from_type( md_alg ); |
| TEST_ASSERT( md_info != NULL ); |
| hlen = mbedtls_md_get_size( md_info ); |
| TEST_ASSERT( mbedtls_md( md_info, (const unsigned char *) msg, |
| strlen( msg ), hash ) == 0 ); |
| |
| TEST_ASSERT( |
| mbedtls_ecdsa_sign_det_ext( &grp, &r, &s, &d, hash, hlen, |
| md_alg, mbedtls_test_rnd_std_rand, |
| NULL ) |
| == 0 ); |
| |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &r, &r_check ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_cmp_mpi( &s, &s_check ) == 0 ); |
| |
| exit: |
| mbedtls_ecp_group_free( &grp ); |
| mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); |
| mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */ |
| void ecdsa_write_read_random( int id ) |
| { |
| mbedtls_ecdsa_context ctx; |
| mbedtls_test_rnd_pseudo_info rnd_info; |
| unsigned char hash[32]; |
| unsigned char sig[200]; |
| size_t sig_len, i; |
| |
| mbedtls_ecdsa_init( &ctx ); |
| memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) ); |
| memset( hash, 0, sizeof( hash ) ); |
| memset( sig, 0x2a, sizeof( sig ) ); |
| |
| /* prepare material for signature */ |
| TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info, |
| hash, sizeof( hash ) ) == 0 ); |
| |
| /* generate signing key */ |
| TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id, |
| &mbedtls_test_rnd_pseudo_rand, |
| &rnd_info ) == 0 ); |
| |
| /* generate and write signature, then read and verify it */ |
| TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256, |
| hash, sizeof( hash ), |
| sig, &sig_len, &mbedtls_test_rnd_pseudo_rand, |
| &rnd_info ) == 0 ); |
| TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), |
| sig, sig_len ) == 0 ); |
| |
| /* check we didn't write past the announced length */ |
| for( i = sig_len; i < sizeof( sig ); i++ ) |
| TEST_ASSERT( sig[i] == 0x2a ); |
| |
| /* try verification with invalid length */ |
| TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), |
| sig, sig_len - 1 ) != 0 ); |
| TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), |
| sig, sig_len + 1 ) != 0 ); |
| |
| /* try invalid sequence tag */ |
| sig[0]++; |
| TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), |
| sig, sig_len ) != 0 ); |
| sig[0]--; |
| |
| /* try modifying r */ |
| sig[10]++; |
| TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), |
| sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); |
| sig[10]--; |
| |
| /* try modifying s */ |
| sig[sig_len - 1]++; |
| TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), |
| sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); |
| sig[sig_len - 1]--; |
| |
| exit: |
| mbedtls_ecdsa_free( &ctx ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE */ |
| void ecdsa_read_restart( int id, data_t *pk, data_t *hash, data_t *sig, |
| int max_ops, int min_restart, int max_restart ) |
| { |
| mbedtls_ecdsa_context ctx; |
| mbedtls_ecdsa_restart_ctx rs_ctx; |
| int ret, cnt_restart; |
| |
| mbedtls_ecdsa_init( &ctx ); |
| mbedtls_ecdsa_restart_init( &rs_ctx ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 ); |
| TEST_ASSERT( mbedtls_ecp_point_read_binary( &ctx.grp, &ctx.Q, |
| pk->x, pk->len ) == 0 ); |
| |
| mbedtls_ecp_set_max_ops( max_ops ); |
| |
| cnt_restart = 0; |
| 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 && ++cnt_restart ); |
| |
| TEST_ASSERT( ret == 0 ); |
| TEST_ASSERT( cnt_restart >= min_restart ); |
| TEST_ASSERT( cnt_restart <= max_restart ); |
| |
| /* try modifying r */ |
| |
| TEST_ASSERT( sig->len > 10 ); |
| 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, |
| char *msg, 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 hash[MBEDTLS_MD_MAX_SIZE]; |
| unsigned char sig[MBEDTLS_ECDSA_MAX_LEN]; |
| size_t hlen, slen; |
| const mbedtls_md_info_t *md_info; |
| |
| mbedtls_ecdsa_restart_init( &rs_ctx ); |
| mbedtls_ecdsa_init( &ctx ); |
| memset( hash, 0, sizeof( hash ) ); |
| memset( sig, 0, sizeof( sig ) ); |
| |
| TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 ); |
| TEST_ASSERT( mbedtls_mpi_read_string( &ctx.d, 16, d_str ) == 0 ); |
| |
| md_info = mbedtls_md_info_from_type( md_alg ); |
| TEST_ASSERT( md_info != NULL ); |
| |
| hlen = mbedtls_md_get_size( md_info ); |
| TEST_ASSERT( mbedtls_md( md_info, |
| (const unsigned char *) msg, strlen( msg ), |
| hash ) == 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, hlen, sig, &slen, NULL, 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, hlen, sig, &slen, NULL, NULL, &rs_ctx ); |
| TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ); |
| } |
| |
| exit: |
| mbedtls_ecdsa_restart_free( &rs_ctx ); |
| mbedtls_ecdsa_free( &ctx ); |
| } |
| /* END_CASE */ |
