ReadEntitlementsFromCodeSignature.m

#import <dlfcn.h>
#import <mach-o/dyld.h>
#import <mach-o/loader.h>


int main(int argc, char *argv[]) {
    
    NSData *data = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] executablePath]];
    NSData *codeSignatureData = nil;

    const struct mach_header *header = [data bytes];
    const struct load_command *cmd = (void *)(header + 1);
    for (uint32_t i = 0; i < header->ncmds; i++) {
        if (cmd->cmd == LC_CODE_SIGNATURE) {
            struct linkedit_data_command *ldc = (void *)cmd;
            codeSignatureData = [data subdataWithRange:NSMakeRange(ldc->dataoff, ldc->datasize)];
            break;
        }
        cmd = (void *)((const char *)cmd) + cmd->cmdsize;
    }
    
    const char *ptr = [codeSignatureData bytes];
    char *start = memmem([codeSignatureData bytes], [codeSignatureData length], "<plist version=", 15);
    char *end = memmem(start, [codeSignatureData length] - (start - ptr), "</plist>", 8) + 8;
    NSError *error = nil;
    NSRange range = NSMakeRange(start - ptr, end - start);
    NSData *plistData = [codeSignatureData subdataWithRange:range];
    NSDictionary *plist = [NSPropertyListSerialization propertyListWithData:plistData options:0 format:NULL error:&error];
    NSLog(@"%@", plist);
    
    return 0;
}