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103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef SHELL_WINDOWSUSERCHOICE_H__
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#define SHELL_WINDOWSUSERCHOICE_H__
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#include <windows.h>
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#include "mozilla/UniquePtr.h"
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/*
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* Check the UserChoice Hashes for https, http, .html, .htm
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*
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* This should be checked before attempting to set a new default browser via
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* the UserChoice key, to confirm our understanding of the existing hash.
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* If an incorrect hash is written, Windows will prompt the user to choose a
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* new default (or, in recent versions, it will just reset the default to Edge).
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*
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* Assuming that the existing hash value is correct (since Windows is fairly
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* diligent about replacing bad keys), if we can recompute it from scratch,
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* then we should be able to compute a correct hash for our new UserChoice key.
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*
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* @return true if we matched all the hashes, false otherwise.
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*/
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bool CheckBrowserUserChoiceHashes();
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/*
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* Result from CheckUserChoiceHash()
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*
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* NOTE: Currently the only positive result is OK_V1 , but the enum
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* could be extended to indicate different versions of the hash.
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*/
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enum class CheckUserChoiceHashResult {
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OK_V1, // Matched the current version of the hash (as of Win10 20H2).
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ERR_MISMATCH, // The hash did not match.
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ERR_OTHER, // Error reading or generating the hash.
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};
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/*
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* Generate a UserChoice Hash, compare it with the one that is stored.
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*
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* See comments on CheckBrowserUserChoiceHashes(), which calls this to check
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* each of the browser associations.
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*
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* @param aExt File extension or protocol association to check
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* @param aUserSid String SID of the current user
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*
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* @return Result of the check, see CheckUserChoiceHashResult
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*/
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CheckUserChoiceHashResult CheckUserChoiceHash(const wchar_t* aExt,
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const wchar_t* aUserSid);
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/*
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* Get the registry path for the given association, file extension or protocol.
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*
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* @return The path, or nullptr on failure.
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*/
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mozilla::UniquePtr<wchar_t[]> GetAssociationKeyPath(const wchar_t* aExt);
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/*
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* Get the current user's SID
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*
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* @return String SID for the user of the current process, nullptr on failure.
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*/
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mozilla::UniquePtr<wchar_t[]> GetCurrentUserStringSid();
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/*
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* Generate the UserChoice Hash
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*
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* @param aExt file extension or protocol being registered
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* @param aUserSid string SID of the current user
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* @param aProgId ProgId to associate with aExt
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* @param aTimestamp approximate write time of the UserChoice key (within
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* the same minute)
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*
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* @return UserChoice Hash, nullptr on failure.
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*/
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mozilla::UniquePtr<wchar_t[]> GenerateUserChoiceHash(const wchar_t* aExt,
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const wchar_t* aUserSid,
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const wchar_t* aProgId,
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SYSTEMTIME aTimestamp);
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/*
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* Build a ProgID from a base and AUMI
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*
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* @param aProgIDBase A base, such as FirefoxHTML or FirefoxURL
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* @param aAumi The AUMI of the installation
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*
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* @return Formatted ProgID.
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*/
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mozilla::UniquePtr<wchar_t[]> FormatProgID(const wchar_t* aProgIDBase,
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const wchar_t* aAumi);
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/*
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* Check that the given ProgID exists in HKCR
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*
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* @return true if it could be opened for reading, false otherwise.
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*/
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bool CheckProgIDExists(const wchar_t* aProgID);
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#endif // SHELL_WINDOWSUSERCHOICE_H__
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