mirror of
https://github.com/reactos/reactos.git
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419 lines
11 KiB
C
419 lines
11 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: Security Account Manager (SAM) Server
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* FILE: reactos/dll/win32/samsrv/registry.c
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* PURPOSE: Registry helper functions
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*
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* PROGRAMMERS: Eric Kohl
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*/
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#include "lsasrv.h"
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/* FUNCTIONS ***************************************************************/
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static
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BOOLEAN
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IsStringType(ULONG Type)
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{
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return (Type == REG_SZ) || (Type == REG_EXPAND_SZ) || (Type == REG_MULTI_SZ);
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}
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NTSTATUS
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LsapRegCloseKey(IN HANDLE KeyHandle)
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{
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return NtClose(KeyHandle);
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}
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NTSTATUS
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LsapRegCreateKey(IN HANDLE ParentKeyHandle,
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IN LPCWSTR KeyName,
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IN ACCESS_MASK DesiredAccess,
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OUT HANDLE KeyHandle)
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{
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OBJECT_ATTRIBUTES ObjectAttributes;
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UNICODE_STRING Name;
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ULONG Disposition;
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RtlInitUnicodeString(&Name, KeyName);
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InitializeObjectAttributes(&ObjectAttributes,
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&Name,
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OBJ_CASE_INSENSITIVE | OBJ_OPENIF,
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ParentKeyHandle,
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NULL);
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/* Create the key */
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return ZwCreateKey(KeyHandle,
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DesiredAccess,
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&ObjectAttributes,
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0,
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NULL,
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0,
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&Disposition);
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}
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NTSTATUS
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LsapRegDeleteSubKey(IN HANDLE ParentKeyHandle,
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IN LPCWSTR KeyName)
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{
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OBJECT_ATTRIBUTES ObjectAttributes;
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UNICODE_STRING SubKeyName;
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HANDLE TargetKey;
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NTSTATUS Status;
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RtlInitUnicodeString(&SubKeyName,
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(LPWSTR)KeyName);
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InitializeObjectAttributes(&ObjectAttributes,
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&SubKeyName,
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OBJ_CASE_INSENSITIVE,
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ParentKeyHandle,
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NULL);
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Status = NtOpenKey(&TargetKey,
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DELETE,
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&ObjectAttributes);
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if (!NT_SUCCESS(Status))
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return Status;
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Status = NtDeleteKey(TargetKey);
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NtClose(TargetKey);
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return Status;
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}
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NTSTATUS
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LsapRegDeleteKey(IN HANDLE KeyHandle)
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{
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return NtDeleteKey(KeyHandle);
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}
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NTSTATUS
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LsapRegEnumerateSubKey(IN HANDLE KeyHandle,
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IN ULONG Index,
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IN ULONG Length,
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OUT LPWSTR Buffer)
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{
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PKEY_BASIC_INFORMATION KeyInfo = NULL;
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ULONG BufferLength = 0;
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ULONG ReturnedLength;
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NTSTATUS Status;
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/* Check if we have a name */
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if (Length)
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{
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/* Allocate a buffer for it */
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BufferLength = sizeof(KEY_BASIC_INFORMATION) + Length * sizeof(WCHAR);
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KeyInfo = RtlAllocateHeap(RtlGetProcessHeap(), 0, BufferLength);
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if (KeyInfo == NULL)
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return STATUS_NO_MEMORY;
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}
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/* Enumerate the key */
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Status = ZwEnumerateKey(KeyHandle,
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Index,
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KeyBasicInformation,
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KeyInfo,
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BufferLength,
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&ReturnedLength);
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if (NT_SUCCESS(Status))
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{
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/* Check if the name fits */
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if (KeyInfo->NameLength < (Length * sizeof(WCHAR)))
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{
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/* Copy it */
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RtlMoveMemory(Buffer,
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KeyInfo->Name,
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KeyInfo->NameLength);
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/* Terminate the string */
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Buffer[KeyInfo->NameLength / sizeof(WCHAR)] = UNICODE_NULL;
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}
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else
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{
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/* Otherwise, we ran out of buffer space */
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Status = STATUS_BUFFER_OVERFLOW;
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}
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}
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/* Free the buffer and return status */
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if (KeyInfo)
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RtlFreeHeap(RtlGetProcessHeap(), 0, KeyInfo);
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return Status;
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}
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NTSTATUS
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LsapRegOpenKey(IN HANDLE ParentKeyHandle,
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IN LPCWSTR KeyName,
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IN ACCESS_MASK DesiredAccess,
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OUT HANDLE KeyHandle)
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{
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OBJECT_ATTRIBUTES ObjectAttributes;
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UNICODE_STRING Name;
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RtlInitUnicodeString(&Name, KeyName);
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InitializeObjectAttributes(&ObjectAttributes,
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&Name,
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OBJ_CASE_INSENSITIVE,
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ParentKeyHandle,
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NULL);
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return NtOpenKey(KeyHandle,
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DesiredAccess,
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&ObjectAttributes);
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}
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NTSTATUS
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LsapRegQueryKeyInfo(IN HANDLE KeyHandle,
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OUT PULONG SubKeyCount,
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OUT PULONG MaxSubKeyNameLength,
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OUT PULONG ValueCount)
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{
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KEY_FULL_INFORMATION FullInfoBuffer;
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ULONG Length;
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NTSTATUS Status;
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FullInfoBuffer.ClassLength = 0;
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FullInfoBuffer.ClassOffset = FIELD_OFFSET(KEY_FULL_INFORMATION, Class);
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Status = NtQueryKey(KeyHandle,
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KeyFullInformation,
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&FullInfoBuffer,
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sizeof(KEY_FULL_INFORMATION),
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&Length);
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TRACE("NtQueryKey() returned status 0x%08lX\n", Status);
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if (!NT_SUCCESS(Status))
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return Status;
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if (SubKeyCount != NULL)
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*SubKeyCount = FullInfoBuffer.SubKeys;
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if (MaxSubKeyNameLength != NULL)
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*MaxSubKeyNameLength = FullInfoBuffer.MaxNameLen;
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if (ValueCount != NULL)
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*ValueCount = FullInfoBuffer.Values;
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return Status;
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}
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NTSTATUS
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LsapRegDeleteValue(IN HANDLE KeyHandle,
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IN LPWSTR ValueName)
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{
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UNICODE_STRING Name;
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RtlInitUnicodeString(&Name,
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ValueName);
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return NtDeleteValueKey(KeyHandle,
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&Name);
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}
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NTSTATUS
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LsapRegEnumerateValue(IN HANDLE KeyHandle,
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IN ULONG Index,
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OUT LPWSTR Name,
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IN OUT PULONG NameLength,
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OUT PULONG Type OPTIONAL,
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OUT PVOID Data OPTIONAL,
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IN OUT PULONG DataLength OPTIONAL)
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{
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PKEY_VALUE_FULL_INFORMATION ValueInfo = NULL;
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ULONG BufferLength = 0;
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ULONG ReturnedLength;
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NTSTATUS Status;
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TRACE("Index: %lu\n", Index);
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/* Calculate the required buffer length */
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BufferLength = FIELD_OFFSET(KEY_VALUE_FULL_INFORMATION, Name);
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BufferLength += (MAX_PATH + 1) * sizeof(WCHAR);
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if (Data != NULL)
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BufferLength += *DataLength;
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/* Allocate the value buffer */
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ValueInfo = RtlAllocateHeap(RtlGetProcessHeap(), 0, BufferLength);
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if (ValueInfo == NULL)
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return STATUS_NO_MEMORY;
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/* Enumerate the value*/
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Status = ZwEnumerateValueKey(KeyHandle,
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Index,
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KeyValueFullInformation,
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ValueInfo,
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BufferLength,
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&ReturnedLength);
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if (NT_SUCCESS(Status))
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{
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if (Name != NULL)
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{
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/* Check if the name fits */
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if (ValueInfo->NameLength < (*NameLength * sizeof(WCHAR)))
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{
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/* Copy it */
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RtlMoveMemory(Name,
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ValueInfo->Name,
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ValueInfo->NameLength);
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/* Terminate the string */
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Name[ValueInfo->NameLength / sizeof(WCHAR)] = UNICODE_NULL;
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}
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else
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{
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/* Otherwise, we ran out of buffer space */
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Status = STATUS_BUFFER_OVERFLOW;
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goto done;
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}
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}
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if (Data != NULL)
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{
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/* Check if the data fits */
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if (ValueInfo->DataLength <= *DataLength)
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{
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/* Copy it */
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RtlMoveMemory(Data,
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(PVOID)((ULONG_PTR)ValueInfo + ValueInfo->DataOffset),
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ValueInfo->DataLength);
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/* if the type is REG_SZ and data is not 0-terminated
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* and there is enough space in the buffer NT appends a \0 */
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if (IsStringType(ValueInfo->Type) &&
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ValueInfo->DataLength <= *DataLength - sizeof(WCHAR))
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{
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WCHAR *ptr = (WCHAR *)((ULONG_PTR)Data + ValueInfo->DataLength);
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if ((ptr > (WCHAR *)Data) && ptr[-1])
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*ptr = UNICODE_NULL;
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}
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}
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else
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{
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Status = STATUS_BUFFER_OVERFLOW;
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goto done;
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}
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}
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}
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done:
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if ((NT_SUCCESS(Status)) || (Status == STATUS_BUFFER_OVERFLOW))
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{
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if (Type != NULL)
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*Type = ValueInfo->Type;
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if (NameLength != NULL)
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*NameLength = ValueInfo->NameLength;
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if (DataLength != NULL)
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*DataLength = ValueInfo->DataLength;
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}
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/* Free the buffer and return status */
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if (ValueInfo)
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RtlFreeHeap(RtlGetProcessHeap(), 0, ValueInfo);
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return Status;
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}
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NTSTATUS
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LsapRegQueryValue(IN HANDLE KeyHandle,
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IN LPWSTR ValueName,
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OUT PULONG Type OPTIONAL,
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OUT PVOID Data OPTIONAL,
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IN OUT PULONG DataLength OPTIONAL)
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{
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PKEY_VALUE_PARTIAL_INFORMATION ValueInfo;
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UNICODE_STRING Name;
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ULONG BufferLength = 0;
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NTSTATUS Status;
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RtlInitUnicodeString(&Name,
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ValueName);
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if (DataLength != NULL)
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BufferLength = *DataLength;
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BufferLength += FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data);
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/* Allocate memory for the value */
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ValueInfo = RtlAllocateHeap(RtlGetProcessHeap(), 0, BufferLength);
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if (ValueInfo == NULL)
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return STATUS_NO_MEMORY;
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/* Query the value */
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Status = ZwQueryValueKey(KeyHandle,
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&Name,
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KeyValuePartialInformation,
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ValueInfo,
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BufferLength,
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&BufferLength);
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if ((NT_SUCCESS(Status)) || (Status == STATUS_BUFFER_OVERFLOW))
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{
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if (Type != NULL)
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*Type = ValueInfo->Type;
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if (DataLength != NULL)
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*DataLength = ValueInfo->DataLength;
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}
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/* Check if the caller wanted data back, and we got it */
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if ((NT_SUCCESS(Status)) && (Data != NULL))
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{
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/* Copy it */
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RtlMoveMemory(Data,
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ValueInfo->Data,
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ValueInfo->DataLength);
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/* if the type is REG_SZ and data is not 0-terminated
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* and there is enough space in the buffer NT appends a \0 */
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if (IsStringType(ValueInfo->Type) &&
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ValueInfo->DataLength <= *DataLength - sizeof(WCHAR))
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{
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WCHAR *ptr = (WCHAR *)((ULONG_PTR)Data + ValueInfo->DataLength);
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if ((ptr > (WCHAR *)Data) && ptr[-1])
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*ptr = UNICODE_NULL;
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}
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}
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/* Free the memory and return status */
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RtlFreeHeap(RtlGetProcessHeap(), 0, ValueInfo);
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if ((Data == NULL) && (Status == STATUS_BUFFER_OVERFLOW))
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Status = STATUS_SUCCESS;
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return Status;
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}
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NTSTATUS
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LsapRegSetValue(HANDLE KeyHandle,
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LPWSTR ValueName,
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ULONG Type,
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LPVOID Data,
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ULONG DataLength)
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{
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UNICODE_STRING Name;
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RtlInitUnicodeString(&Name,
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ValueName);
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return ZwSetValueKey(KeyHandle,
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&Name,
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0,
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Type,
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Data,
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DataLength);
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}
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