About Symbian UIDs( From er.khalid) Monday, October 12, 2009

UID1-First UID (Type)

UID1-Indicates whether this is an executable file or data file.

UID value	Numeric value (Hex)	Meaning
KExecutableImageUid	0x1000007A	Indicates this an .exe executable file
KDaynamicLibraryUid	0x10000079	Indicates this a DLL(executable) There are various types, with different extension(.dll, .app, .ldd, .pdd)
KDirectFileStoreLayoutUid	0x10000037	Indicates this is a direct file store (data, not executable)Bracketed values from header files
KPermanentFileStoreLayoutUid	0x10000050	Indicates this is a permanent file store(data, not executable)

UID2-Second UID (Subtype)

UID2-The meaning of this Uid depends on the value of UID1.

1. If UID1 was KExecutableImageUid, UID2 isn’t used.
2. If UID1 was KDaynamicLibraryUid, UID2 will be

UID value	Numeric value (Hex)	Meaning
KSharedLibraryUid	0x1000008D	Indicates this is a static interface DLL (.dll)
KUidApp	0x100039CE	Indicates an application conforming to APPARC(includes all Qikon apps, .app)
KLogicalDeviceDriverUid	0x100000AF	Indicates his is a logical decive driver (.ldd)
KPhysicalDeviceDriverUid	0x100039D0	Indicates this is a physical device driver(.pdd)

1. If UID1 was KDirectFileStoreLayoutUid or KPermanentFileStoreLayoutUid, then UID2 can be:

UID value	Numeric value (Hex)	Meaning
KUidAppDllDoc	0x10003A12	Indicates this is a file store created by an .app to store user data (i.e, a document)
KUidAppInfoFile	0x10003A38	Indicates this is an AIF file (a type of file store)

Secure ID – UID3-Third UID (sub-subType) (Subtype)

UID3-This UID has a unique value for each individual application program and is also used as the Secure ID. For UIKON applications it is used to associate data files with programs

1. For .dll and .exe’s , it identifies the particular binary.
2. For .apps (UIKON applications) it identifies the particular application program.
3. For file stores that were created by .apps, it identifies the application program associated with this file.
4. For other file stores, It’s not typically used (but you could use it for anything you want).

The SecureID for a binary is not specified explicitly, instead it is taken to be the same as the third UID. If an application has a secureID of zero, this mean ‘undefined’ , and has several consequences, including lack of privacy for data used by application.