AAAssetExtractor_example.m

#import <Foundation/Foundation.h>
#import <AppleArchive/AppleArchive.h>

extern void * AAAssetExtractorCreate(const char *, void *, unsigned long);
extern int AAAssetExtractorSetParameterPtr(void *, int, void *);
extern int AAAssetExtractorSetParameterCallback(void *, int, void *);
extern void AAAssetBuilderDestroy(void *);
extern size_t AAAssetExtractorWrite(void *, void *, ssize_t);

BOOL foo(void) {
    return NO;
};

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        AAByteStream sourceFileStream = AAFileStreamOpenWithPath("/Volumes/Data 1/iOS18.6_OTAs/iPhone17,2_KEY_[wb2vJvryQhC836Xl6yf9lLHm37NfWtvQ1w17GgtilgI=]_83ec3d717ba475a22ef24a6daf0a7b9c2b56993cc302f443e4222dd7901b83a4.aea", O_RDONLY, 0);
        assert(sourceFileStream != NULL);
        AAByteStream decryptedFileStream = AAFileStreamOpenWithPath("/Volumes/Data 1/iOS18.6_OTAs/decrypted.aar", O_RDWR | O_CREAT | O_TRUNC, 0);
        assert(decryptedFileStream != NULL);
        
        AEAContext context = AEAContextCreateWithEncryptedStream(sourceFileStream);
        assert(context != NULL);
        NSData *data = [[NSData alloc] initWithBase64EncodedString:@"wb2vJvryQhC836Xl6yf9lLHm37NfWtvQ1w17GgtilgI=" options:0];
        assert(AEAContextSetSymmetricKey(context, data.bytes, data.length) == 0);
        
        AAByteStream decryptionStream = AEADecryptionInputStreamOpen(sourceFileStream, context, 0, 0);
        assert(decryptionStream != NULL);
        
        assert(AAByteStreamProcess(decryptionStream, decryptedFileStream) > 0);
        
        AAByteStreamClose(sourceFileStream);
        AEAContextDestroy(context);
        
        //
        
        off_t offset = 0;
        void *extractor = AAAssetExtractorCreate("/Volumes/Data 1/iOS18.6_OTAs/decrypted_out", &offset, 0x4000000000000002);
        assert(extractor != NULL);
        
        assert(AAAssetExtractorSetParameterPtr(extractor, 105, "/Volumes/Data 1/iOS18.6_OTAs/src_empty") == 0);
        assert(AAAssetExtractorSetParameterCallback(extractor, 104, foo) == 0); // Filter
        
        char bytes[0x40000];
        size_t size = 0x40000;
        
        while (true) {
            size = AAByteStreamPRead(decryptedFileStream, bytes, size, offset);
            if (size == 0) break;
            
            ssize_t result = AAAssetExtractorWrite(extractor, bytes, size);
            if (result == 0) break;
            offset += result;
            size = result;
        }
        
        AAAssetBuilderDestroy(extractor);
        AAByteStreamClose(decryptionStream);
    }
    
    return EXIT_SUCCESS;
}