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Code Issues Projects Releases Wiki Activity

Verify the entitlements match the plist, fixes #551

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Lior Halphon
2023-12-21 23:45:07 +02:00
parent 8ed46a6a58
commit 2e38cec98b
1 changed files with 53 additions and 1 deletions
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54
iOS/GBViewController.m
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@@ -13,7 +13,7 @@
#import "GBSettingsViewController.h"
#import "GBStatesViewController.h"
#import <CoreMotion/CoreMotion.h>
#import <Core/gb.h>
#import <dlfcn.h>
@implementation GBViewController
{
@@ -246,10 +246,62 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
[_backgroundView addSubview:_cameraPositionButton];
[UNUserNotificationCenter currentNotificationCenter].delegate = self;
[self verifyEntitlements];
return true;
}
- (void)verifyEntitlements
{
/*
Make sure SameBoy is properly signed. If the bundle identifier the Info.plist file does not match the bundle
identifier in the application-identifier entitlement, iOS will not allow SameBoy to open files.
*/
typedef void *xpc_object_t;
void *libxpc = dlopen("/usr/lib/system/libxpc.dylib", RTLD_NOW);
extern xpc_object_t xpc_copy_entitlements_for_self$(void);
extern void xpc_release$ (xpc_object_t *object);
extern const char *xpc_dictionary_get_string$ (xpc_object_t *object, const char *key);
typeof(xpc_copy_entitlements_for_self$) *xpc_copy_entitlements_for_self = dlsym(libxpc, "xpc_copy_entitlements_for_self");
typeof(xpc_release$) *xpc_release = dlsym(libxpc, "xpc_release");
typeof(xpc_dictionary_get_string$) *xpc_dictionary_get_string = dlsym(libxpc, "xpc_dictionary_get_string");
if (!xpc_copy_entitlements_for_self || !xpc_release || !xpc_dictionary_get_string) return;
xpc_object_t entitlements = xpc_copy_entitlements_for_self();
if (!entitlements) return;
const char *_entIdentifier = xpc_dictionary_get_string(entitlements, "application-identifier");
NSString *entIdentifier = _entIdentifier? @(_entIdentifier) : nil;
const char *_teamIdentifier = xpc_dictionary_get_string(entitlements, "com.apple.developer.team-identifier");
NSString *teamIdentifier = _teamIdentifier? @(_teamIdentifier) : nil;
xpc_release(entitlements);
if (!entIdentifier) { // No identifier. Installed using a jailbreak, we're fine.
return;
}
if (teamIdentifier && [entIdentifier hasPrefix:[teamIdentifier stringByAppendingString:@"."]]) {
entIdentifier = [entIdentifier substringFromIndex:teamIdentifier.length + 1];
}
NSString *plistIdentifier = [NSBundle mainBundle].bundleIdentifier;
if (![entIdentifier isEqual:plistIdentifier]) {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"SameBoy is not properly signed and might not be able to open ROMs"
message:[NSString stringWithFormat:@"The bundle identifier in the Info.plist file (“%@”) does not match the one in the entitlements (“%@”)", plistIdentifier, entIdentifier]
preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:[UIAlertAction actionWithTitle:@"Close"
style:UIAlertActionStyleCancel
handler:nil]];
[self presentViewController:alert animated:true completion:nil];
}
}
- (void)saveStateToFile:(NSString *)file
{
GB_save_state(&_gb, file.fileSystemRepresentation);