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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2017 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <psxtypes/psxtypes.h>
#include <ntapi/nt_status.h>
#include "ntapi_impl.h"
int32_t __fastcall __ntapi_tt_hex_utf8_to_uint32(
__in const unsigned char hex_key_utf8[8],
__out uint32_t * key)
{
int i;
unsigned char uch[8];
unsigned char ubytes[4];
uint32_t * key_ret;
/* input validation */
i = 0;
do {
if (/* [a-f],[[A-F],[0-9] */
((hex_key_utf8[i] >= 'a') && (hex_key_utf8[i] <= 'f'))
|| ((hex_key_utf8[i] >= 'A') && (hex_key_utf8[i] <= 'F'))
|| ((hex_key_utf8[i] >= '0') && (hex_key_utf8[i] <= '9')))
/* valid hex character */
i++;
else
return NT_STATUS_ILLEGAL_CHARACTER;
} while (i < 8);
/* intermediate step: little endian byte order */
uch[0] = hex_key_utf8[6];
uch[1] = hex_key_utf8[7];
uch[2] = hex_key_utf8[4];
uch[3] = hex_key_utf8[5];
uch[4] = hex_key_utf8[2];
uch[5] = hex_key_utf8[3];
uch[6] = hex_key_utf8[0];
uch[7] = hex_key_utf8[1];
for (i=0; i<8; i++) {
/* 'a' > 'A' > '0' */
if (uch[i] >= 'a')
uch[i] -= ('a' - 0x0a);
else if (uch[i] >= 'A')
uch[i] -= ('A' - 0x0a);
else
uch[i] -= '0';
}
ubytes[0] = uch[0] * 0x10 + uch[1];
ubytes[1] = uch[2] * 0x10 + uch[3];
ubytes[2] = uch[4] * 0x10 + uch[5];
ubytes[3] = uch[6] * 0x10 + uch[7];
key_ret = (uint32_t *)ubytes;
*key = *key_ret;
return NT_STATUS_SUCCESS;
}
int32_t __fastcall __ntapi_tt_hex_utf8_to_uint64(
__in const unsigned char hex_key_utf8[16],
__out uint64_t * key)
{
int32_t status;
uint32_t x64_key[2];
uint64_t * key_ret;
status = __ntapi_tt_hex_utf8_to_uint32(
&hex_key_utf8[0],
&x64_key[1]);
if (status != NT_STATUS_SUCCESS)
return status;
status = __ntapi_tt_hex_utf8_to_uint32(
&hex_key_utf8[8],
&x64_key[0]);
if (status != NT_STATUS_SUCCESS)
return status;
key_ret = (uint64_t *)x64_key;
*key = *key_ret;
return NT_STATUS_SUCCESS;
}
int32_t __fastcall __ntapi_tt_hex_utf8_to_uintptr(
__in const unsigned char hex_key_utf8[],
__out uintptr_t * key)
{
#if (__SIZEOF_POINTER__ == 4)
return __ntapi_tt_hex_utf8_to_uint32(hex_key_utf8,key);
#elif (__SIZEOF_POINTER__ == 8)
return __ntapi_tt_hex_utf8_to_uint64(hex_key_utf8,key);
#endif
}
int32_t __fastcall __ntapi_tt_hex_utf8_to_uint16(
__in const unsigned char hex_key_utf8[4],
__out uint16_t * key)
{
int32_t ret;
uint32_t dword_key;
unsigned char hex_buf[8] = {'0','0','0','0'};
hex_buf[4] = hex_key_utf8[0];
hex_buf[5] = hex_key_utf8[1];
hex_buf[6] = hex_key_utf8[2];
hex_buf[7] = hex_key_utf8[3];
ret = __ntapi_tt_hex_utf8_to_uint32(hex_buf,&dword_key);
if (ret == NT_STATUS_SUCCESS)
*key = (uint16_t)dword_key;
return ret;
}
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