Remove All trusted applications from a keychain item - objective-c

Question

I wrote the below code to add a generic password from my app. SecKeychainAddGenericPassword() adds the app as a trusted application in the keychain by design.
I want to remove my app from the list of trusted apps. I called SecKeychainItemSetAccess () to do that but I still see my app listed as a trusted app.
addgenericpassword(const std::string& service,const std::string& account,
const std::string& password) {
SecKeychainItemRef item_ref;
OSStatus status = SecKeychainAddGenericPassword(NULL,
service.length(),
service.data(),
account.length(),
account.data(),
password.length(),
password.data(),
&item_ref);
//Creating an secAccess object that has an empty trusted application list
//https://developer.apple.com/documentation/security/1393522-secaccesscreate?language=objc
CFArrayRef applicationList=CFArrayCreate (NULL,NULL,0,NULL);
SecAccessRef accessref;
CFStringRef description=CFStringCreateWithCString(NULL, "Generic description", kCFStringEncodingASCII);
status = SecAccessCreate(description,applicationList,&accessref);
//Set the access of a keychain item "item_ref".
status = SecKeychainItemSetAccess(item_ref,accessref);
CFRelease(item_ref);
CFRelease(accessref);
CFRelease(applicationList);
CFRelease(description);
return 0;
}
Update:
Changed description to match the service name. Still no luck
CFStringRef description=CFStringCreateWithCString(NULL, service.data(), kCFStringEncodingASCII);

Answer 1

I have been able to get the functionality I was looking for.I am not sure if this is the right method to do it though.
SecAccessRef accessref;
SecKeychainItemCopyAccess(item_ref, &accessref);
CFArrayRef aclList;
SecAccessCopyACLList(accessref, &aclList);
CFIndex count = CFArrayGetCount(aclList);
//Array with 0 Applications / Empty Array . Not the same as passing NULL
CFArrayRef zero_applications = CFArrayCreate(NULL, NULL, 0, NULL);
for (int i = 0; i < count; i++) {
SecACLRef acl = (SecACLRef) CFArrayGetValueAtIndex(aclList, i);
CFArrayRef applicationList;
CFStringRef description;
CSSM_ACL_KEYCHAIN_PROMPT_SELECTOR promptSelector;
SecACLCopySimpleContents(acl, &applicationList, &description,
&promptSelector);
if (applicationList == NULL) {
continue;
}
CFIndex appCount = CFArrayGetCount(applicationList);
for (int j = 0; j < appCount; j++) {
status= SecACLSetContents(acl, zero_applications, description, 1);
break;
}
CFRelease(applicationList);
CFRelease(description);
}
// Set the modified copy to the item now
status = SecKeychainItemSetAccess(item_ref, accessref);