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test: added validation checks for config string option saelections. 

This will avoid a reported buffer overflow issue related to invalid (long) options being specified.
merge-requests/813/head
Ralph Little 2023-10-02 16:23:07 -07:00
rodzic ebb8152058
commit 6fc47c4c14
1 zmienionych plików z 51 dodań i 12 usunięć
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63
backend/test.c
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@ -1432,6 +1432,43 @@ read_option (SANE_String line, SANE_String option_string,
return SANE_STATUS_GOOD;
}
static SANE_Status
read_option_str_list (SANE_String line, SANE_String option_string,
parameter_type p_type, void *value,
SANE_String_Const *string_list)
{
SANE_String new_value = NULL;
SANE_Status ret = read_option (line, option_string, p_type, &new_value);
if (ret != SANE_STATUS_GOOD)
{
if (new_value)
{
free(new_value);
}
return ret;
}
for (SANE_String_Const *option = string_list; *option; option++)
{
if (strcmp (*option, new_value) == 0)
{
if (*(SANE_String*) value)
{
free (*(SANE_String*) value);
}
*(SANE_String*) value = new_value;
return SANE_STATUS_GOOD;
}
}
return SANE_STATUS_INVAL;
}
static SANE_Status
reader_process (Test_Device * test_device, SANE_Int fd)
{
@ -1636,7 +1673,6 @@ print_options (Test_Device * test_device)
/***************************** SANE API ****************************/
SANE_Status
sane_init (SANE_Int * __sane_unused__ version_code, SANE_Auth_Callback __sane_unused__ authorize)
{
@ -1736,20 +1772,23 @@ sane_init (SANE_Int * __sane_unused__ version_code, SANE_Auth_Callback __sane_un
DBG (5, "sane_init: config file line %3d: `%s'\n",
linenumber, line);
if (read_option (line, "number_of_devices", param_int,
&init_number_of_devices) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "mode", param_string,
&init_mode) == SANE_STATUS_GOOD)
continue;
if (read_option_str_list (line, "mode", param_string,
&init_mode, mode_list) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "hand-scanner", param_bool,
&init_hand_scanner) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "three-pass", param_bool,
&init_three_pass) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "three-pass-order", param_string,
&init_three_pass_order) == SANE_STATUS_GOOD)
if (read_option_str_list (line, "three-pass-order", param_string,
&init_three_pass_order, order_list) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "resolution_min", param_fixed,
&resolution_range.min) == SANE_STATUS_GOOD)
@ -1766,11 +1805,11 @@ sane_init (SANE_Int * __sane_unused__ version_code, SANE_Auth_Callback __sane_un
if (read_option (line, "depth", param_int,
&init_depth) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "scan-source", param_string,
&init_scan_source) == SANE_STATUS_GOOD)
if (read_option_str_list (line, "scan-source", param_string,
&init_scan_source, source_list) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "test-picture", param_string,
&init_test_picture) == SANE_STATUS_GOOD)
if (read_option_str_list (line, "test-picture", param_string,
&init_test_picture, test_picture_list) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "invert-endianess", param_bool,
&init_invert_endianess) == SANE_STATUS_GOOD)
@ -1787,8 +1826,8 @@ sane_init (SANE_Int * __sane_unused__ version_code, SANE_Auth_Callback __sane_un
if (read_option (line, "read-delay-duration", param_int,
&init_read_delay_duration) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "read-status-code", param_string,
&init_read_status_code) == SANE_STATUS_GOOD)
if (read_option_str_list (line, "read-status-code", param_string,
&init_read_status_code, read_status_code_list) == SANE_STATUS_GOOD)
continue;
if (read_option (line, "ppl-loss", param_int,
&init_ppl_loss) == SANE_STATUS_GOOD)