mirror of
https://github.com/reactos/reactos.git
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79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* PURPOSE: Security descriptor functions
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* FILE: lib/rtl/encode.c
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* PROGRAMMER: KJK::Hyperion <noog@libero.it>
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* (code contributed by crazylord <crazyl0rd@minithins.net>)
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ***************************************************************/
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VOID NTAPI
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RtlRunDecodeUnicodeString (IN UCHAR Hash,
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IN OUT PUNICODE_STRING String)
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{
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PUCHAR ptr;
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USHORT i;
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ptr = (PUCHAR)String->Buffer;
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if (String->Length > 1)
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{
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for (i = String->Length; i > 1; i--)
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{
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ptr[i - 1] ^= ptr[i - 2] ^ Hash;
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}
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}
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if (String->Length >= 1)
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{
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ptr[0] ^= Hash | (UCHAR)0x43;
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}
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}
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VOID NTAPI
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RtlRunEncodeUnicodeString (IN OUT PUCHAR Hash,
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IN OUT PUNICODE_STRING String)
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{
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LARGE_INTEGER CurrentTime;
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PUCHAR ptr;
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USHORT i;
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NTSTATUS Status;
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ptr = (PUCHAR) String->Buffer;
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if (*Hash == 0)
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{
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Status = NtQuerySystemTime (&CurrentTime);
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if (NT_SUCCESS(Status))
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{
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for (i = 1; i < sizeof(LARGE_INTEGER) && (*Hash == 0); i++)
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*Hash |= *(PUCHAR)(((PUCHAR)&CurrentTime) + i);
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}
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if (*Hash == 0)
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*Hash = 1;
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}
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if (String->Length >= 1)
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{
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ptr[0] ^= (*Hash) | (UCHAR)0x43;
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if (String->Length > 1)
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{
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for (i = 1; i < String->Length; i++)
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{
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ptr[i] ^= ptr[i - 1] ^ (*Hash);
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}
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}
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}
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}
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/* EOF */
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