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authortruebrain <truebrain@openttd.org>2011-12-19 20:44:39 +0000
committertruebrain <truebrain@openttd.org>2011-12-19 20:44:39 +0000
commitf8203f09ca0fe6ccafe7e8bf201df5555f746660 (patch)
treebb8750c3af22728aa0e5afc40babcc3541771abc /src
parente75153d8ac12b07f9a47fc08b55a1c6ddb1c4162 (diff)
downloadopenttd-f8203f09ca0fe6ccafe7e8bf201df5555f746660.tar.xz
(svn r23598) -Fix: harden FormatString against abuse
Diffstat (limited to 'src')
-rw-r--r--src/strings.cpp54
1 files changed, 29 insertions, 25 deletions
diff --git a/src/strings.cpp b/src/strings.cpp
index af6b3bb78..907c1e4d4 100644
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -940,7 +940,10 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
/* Tiny description of cargotypes. Layout:
* param 1: cargo type
* param 2: cargo count */
- StringID cargo_str = CargoSpec::Get(args->GetInt32(SCC_CARGO_SHORT))->units_volume;
+ CargoID cargo = args->GetInt32(SCC_CARGO_TINY);
+ if (cargo >= CargoSpec::GetArraySize()) break;
+
+ StringID cargo_str = CargoSpec::Get(cargo)->units_volume;
int64 amount = 0;
switch (cargo_str) {
case STR_TONS:
@@ -965,7 +968,10 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
/* Short description of cargotypes. Layout:
* param 1: cargo type
* param 2: cargo count */
- StringID cargo_str = CargoSpec::Get(args->GetInt32(SCC_CARGO_SHORT))->units_volume;
+ CargoID cargo = args->GetInt32(SCC_CARGO_SHORT);
+ if (cargo >= CargoSpec::GetArraySize()) break;
+
+ StringID cargo_str = CargoSpec::Get(cargo)->units_volume;
switch (cargo_str) {
case STR_TONS: {
assert(_settings_game.locale.units < lengthof(_units));
@@ -995,6 +1001,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
case SCC_CARGO_LONG: { // {CARGO_LONG}
/* First parameter is cargo type, second parameter is cargo count */
CargoID cargo = args->GetInt32(SCC_CARGO_LONG);
+ if (cargo != CT_INVALID && cargo >= CargoSpec::GetArraySize()) break;
+
StringID cargo_str = (cargo == CT_INVALID) ? STR_QUANTITY_N_A : CargoSpec::Get(cargo)->quantifier;
StringParameters tmp_args(*args, 1);
buff = GetStringWithArgs(buff, cargo_str, &tmp_args, last);
@@ -1091,7 +1099,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_COMPANY_NAME: { // {COMPANY}
- const Company *c = Company::Get((CompanyID)args->GetInt32());
+ const Company *c = Company::GetIfValid(args->GetInt32());
+ if (c == NULL) break;
if (c->name != NULL) {
buff = strecpy(buff, c->name, last);
@@ -1136,10 +1145,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_ENGINE_NAME: { // {ENGINE}
- EngineID engine = (EngineID)args->GetInt32(SCC_ENGINE_NAME);
- const Engine *e = Engine::Get(engine);
-
- assert(e != NULL);
+ const Engine *e = Engine::GetIfValid(args->GetInt32(SCC_ENGINE_NAME));
+ if (e == NULL) break;
if (e->name != NULL && e->IsEnabled()) {
buff = strecpy(buff, e->name, last);
@@ -1151,9 +1158,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_GROUP_NAME: { // {GROUP}
- const Group *g = Group::Get(args->GetInt32());
-
- assert(g != NULL);
+ const Group *g = Group::GetIfValid(args->GetInt32());
+ if (g == NULL) break;
if (g->name != NULL) {
buff = strecpy(buff, g->name, last);
@@ -1167,10 +1173,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_INDUSTRY_NAME: { // {INDUSTRY}
- const Industry *i = Industry::Get(args->GetInt32(SCC_INDUSTRY_NAME));
-
- /* industry not valid anymore? */
- assert(i != NULL);
+ const Industry *i = Industry::GetIfValid(args->GetInt32(SCC_INDUSTRY_NAME));
+ if (i == NULL) break;
/* First print the town name and the industry type name. */
int64 args_array[2] = {i->town->index, GetIndustrySpec(i->type)->name};
@@ -1182,7 +1186,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_PRESIDENT_NAME: { // {PRESIDENT_NAME}
- const Company *c = Company::Get((CompanyID)args->GetInt32(SCC_PRESIDENT_NAME));
+ const Company *c = Company::GetIfValid(args->GetInt32(SCC_PRESIDENT_NAME));
+ if (c == NULL) break;
if (c->president_name != NULL) {
buff = strecpy(buff, c->president_name, last);
@@ -1231,9 +1236,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_TOWN_NAME: { // {TOWN}
- const Town *t = Town::Get(args->GetInt32(SCC_TOWN_NAME));
-
- assert(t != NULL);
+ const Town *t = Town::GetIfValid(args->GetInt32(SCC_TOWN_NAME));
+ if (t == NULL) break;
if (t->name != NULL) {
buff = strecpy(buff, t->name, last);
@@ -1244,9 +1248,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_WAYPOINT_NAME: { // {WAYPOINT}
- Waypoint *wp = Waypoint::Get(args->GetInt32(SCC_WAYPOINT_NAME));
-
- assert(wp != NULL);
+ Waypoint *wp = Waypoint::GetIfValid(args->GetInt32(SCC_WAYPOINT_NAME));
+ if (wp == NULL) break;
if (wp->name != NULL) {
buff = strecpy(buff, wp->name, last);
@@ -1261,9 +1264,8 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_VEHICLE_NAME: { // {VEHICLE}
- const Vehicle *v = Vehicle::Get(args->GetInt32(SCC_VEHICLE_NAME));
-
- assert(v != NULL);
+ const Vehicle *v = Vehicle::GetIfValid(args->GetInt32(SCC_VEHICLE_NAME));
+ if (v == NULL) break;
if (v->name != NULL) {
buff = strecpy(buff, v->name, last);
@@ -1286,7 +1288,9 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
}
case SCC_SIGN_NAME: { // {SIGN}
- const Sign *si = Sign::Get(args->GetInt32());
+ const Sign *si = Sign::GetIfValid(args->GetInt32());
+ if (si == NULL) break;
+
if (si->name != NULL) {
buff = strecpy(buff, si->name, last);
} else {