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loader/svg: Check invalid color

Browse source 
Checks whether the string that can be specified in Color is valid.

example)
```
     style="stroke:asdasd"
```

related issue: https://github.com/thorvg/thorvg/issues/1255
This commit is contained in:
JunsuChoi 2024-03-29 10:56:59 +09:00 • committed by Hermet Park
parent cbed261ba2
commit 79c65aa5e7
1 changed files with 16 additions and 9 deletions
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21
src/loaders/svg/tvgSvgLoader.cpp
View file

@ -667,7 +667,7 @@ static bool _hslToRgb(float hue, float satuation, float brightness, uint8_t* red
}
static void _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char** ref)
static bool _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char** ref)
{
unsigned int len = strlen(str);
char *red, *green, *blue;
@ -687,6 +687,7 @@ static void _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char**
tmp[1] = str[3];
*b = strtol(tmp, nullptr, 16);
}
return true;
} else if (len == 7 && str[0] == '#') {
if (isxdigit(str[1]) && isxdigit(str[2]) && isxdigit(str[3]) && isxdigit(str[4]) && isxdigit(str[5]) && isxdigit(str[6])) {
char tmp[3] = { '\0', '\0', '\0' };
@ -700,6 +701,7 @@ static void _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char**
tmp[1] = str[6];
*b = strtol(tmp, nullptr, 16);
}
return true;
} else if (len >= 10 && (str[0] == 'r' || str[0] == 'R') && (str[1] == 'g' || str[1] == 'G') && (str[2] == 'b' || str[2] == 'B') && str[3] == '(' && str[len - 1] == ')') {
tr = _parseColor(str + 4, &red);
if (red && *red == ',') {
@ -713,9 +715,11 @@ static void _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char**
}
}
}
return true;
} else if (ref && len >= 3 && !strncmp(str, "url", 3)) {
if (*ref) free(*ref);
*ref = _idFromUrl((const char*)(str + 3));
return true;
} else if (len >= 10 && (str[0] == 'h' || str[0] == 'H') && (str[1] == 's' || str[1] == 'S') && (str[2] == 'l' || str[2] == 'L') && str[3] == '(' && str[len - 1] == ')') {
float_t th, ts, tb;
const char *content, *hue, *satuation, *brightness;
@ -735,7 +739,7 @@ static void _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char**
tb /= 100.0f;
brightness = _skipSpace(brightness + 1, nullptr);
if (brightness && brightness[0] == ')' && brightness[1] == '\0') {
if (_hslToRgb(th, ts, tb, r, g, b)) return;
return _hslToRgb(th, ts, tb, r, g, b);
}
}
}
@ -747,10 +751,11 @@ static void _toColor(const char* str, uint8_t* r, uint8_t* g, uint8_t* b, char**
*r = (((uint8_t*)(&(colors[i].value)))[2]);
*g = (((uint8_t*)(&(colors[i].value)))[1]);
*b = (((uint8_t*)(&(colors[i].value)))[0]);
return;
return true;
}
}
}
return false;
}
@ -1013,20 +1018,21 @@ static void _handlePaintAttr(SvgPaint* paint, const char* value)
paint->none = true;
return;
}
paint->none = false;
if (!strcmp(value, "currentColor")) {
paint->curColor = true;
paint->none = false;
return;
}
_toColor(value, &paint->color.r, &paint->color.g, &paint->color.b, &paint->url);
if (_toColor(value, &paint->color.r, &paint->color.g, &paint->color.b, &paint->url)) paint->none = false;
}
static void _handleColorAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
SvgStyleProperty* style = node->style;
if (_toColor(value, &style->color.r, &style->color.g, &style->color.b, nullptr)) {
style->curColorSet = true;
_toColor(value, &style->color.r, &style->color.g, &style->color.b, nullptr);
}
}
@ -2493,8 +2499,9 @@ static bool _attrParseStopsStyle(void* data, const char* key, const char* value)
stop->a = _toOpacity(value);
loader->svgParse->flags = (loader->svgParse->flags | SvgStopStyleFlags::StopOpacity);
} else if (!strcmp(key, "stop-color")) {
_toColor(value, &stop->r, &stop->g, &stop->b, nullptr);
if (_toColor(value, &stop->r, &stop->g, &stop->b, nullptr)) {
loader->svgParse->flags = (loader->svgParse->flags | SvgStopStyleFlags::StopColor);
}
} else {
return false;
}