SLC GUID Convert Function's.

first, in low level, all operation managed by GUID,
not partial product KEY, or else.

let's say i want remove License or product key, i pass Guid,
who belond to specifc product {SKU} that i want to remove

SLC.dll offer function to convert one type to another
SKU - GUID -> to this other type's

Code:

"SL_ID_APPLICATION" -> mainly know as WindowsAppID & OfficeAppID
~~~~~~~~~~~~~~~~~~~~~~~~
"SL_ID_PRODUCT_SKU", ID under Main Application
~~~~~~~~~~~~~~~~~~~~~~~~
"SL_ID_LICENSE", Don't know what used for Yet
"SL_ID_PKEY", GUID that we receive after install Product Key, mainly use for remove Product KEY
"SL_ID_LICENSE_FILE", Guid for uninstall license blob function

~~~~~~~~~~~~~~~~~~~~~~~~
For Application ID ONLY
~~~~~~~~~~~~~~~~~~~~~~~~
"SL_ID_ALL_LICENSES",
"SL_ID_ALL_LICENSE_FILES",

So, main function that do the Convert, is SLGetSLIDList, which offical supprot by MS,
but, there is also other function's. Offical & Not offical.

Let's start with the offical One's, it fail to convert SKU_ID to SL_ID_LICENSE_FILE
but do let you receive All SL_ID_LICENSE_FILE GUID,
so, you can remove all license's per APP { WINDOWS APP / OFFICE APP}
and if you want remove ProductKEY, it does let's you get PKEY guid from SKU

Another offical function, to Get PKEY Guid from SKU, {for remove with other SLC API }
is SLGetInstalledProductKeyIds, and if you have actualy whole product key
you can use SLGetPKeyId to get Pkey guid, and pass it to API.

now let's go to un document on'e -> SLGetProductSkuInformation,
first i say it in TSforge, didn't understand too much, after much resaerch.
found even more hidden gem's

Code:

"fileId",               # SL_ID_LICENSE_FILE
"pkeyId",               # SL_ID_PKEY
"pkeyIdList"            # SL_ID_PKEY [Same]
"productSkuId",         # SL_ID_PRODUCT_SKU
"applicationId"         # SL_ID_APPLICATION
"licenseId",            # SL_ID_LICENSE
"privateCertificateId"  # SL_ID_LICENSE

this one convert any to any, include Single SKU to SL_ID_LICENSE_FILE
that the offical one don't support.
what does it matter, well,you can remove now A specific SKU
before that, you would remove store file, and re install all license's,
no, you can locate SKU per Product, Convert SKU -> LICENSE FILE ID -> remove it

 

let's say you sociopath crazy person,
who want to remove windows key, without know current key.
we can use janek2012's magic decoding Function, to decode
--> HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion
--> DigitalProductId4 at offset 808 [part of BCDKEY]

Code:

struct DigitalProductId4 {
    unsigned int uiSize;
    unsigned short MajorVersion;
    unsigned short MinorVersion;
    WCHAR szAdvancedPid[64];
    WCHAR szActivationId[64];
    WCHAR szOemID[8];
    WCHAR szEditionType[260];
    BYTE bIsUpgrade;
    BYTE bReserved[7];
    BYTE bCDKey[16];

than get Windows Current Product Key, Use SLGetPKeyId to get PKEY GUID, from current Product Key
than call SLUninstallProofOfPurchase to remove current windows Product Key
it dumb, stupid, but worked. i tried it. the most hard way to remove Windows product Key.

 

Another way, to remove you own windows key,without know it, i can get creative ... when i want.
Extract SKU from value of Pro' Security-SPP-Action-StateData using API --->
--> RtlInitUnicodeString, ZwQueryLicenseValue Api.if you want higher API, can use SLGetWindowsInformation instead
Get Pkey GUID from SKU GUID using SLGetInstalledProductKeyIds, Remove using SLUninstallProofOfPurchase