From a413881baa6fe317b2e33fc611460a4576bf9d66 Mon Sep 17 00:00:00 2001 From: midipix Date: Sun, 7 Jun 2020 18:40:10 +0000 Subject: string functions: added ntapi_tt_hex_utf8_to_uint{16|32|64|ptr}. --- src/string/ntapi_tt_hex_utf8_to_uintptr.c | 125 ++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 src/string/ntapi_tt_hex_utf8_to_uintptr.c (limited to 'src/string') diff --git a/src/string/ntapi_tt_hex_utf8_to_uintptr.c b/src/string/ntapi_tt_hex_utf8_to_uintptr.c new file mode 100644 index 0000000..1f0fe13 --- /dev/null +++ b/src/string/ntapi_tt_hex_utf8_to_uintptr.c @@ -0,0 +1,125 @@ +/********************************************************/ +/* ntapi: Native API core library */ +/* Copyright (C) 2013--2017 Z. Gilboa */ +/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */ +/********************************************************/ + +#include +#include +#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; +} -- cgit v1.2.3