319 lines
8.2 KiB
C++
319 lines
8.2 KiB
C++
#include "util.h"
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#include "defs.h"
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#include "host.h"
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#include <sstream>
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#include <Psapi.h>
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namespace
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{
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std::optional<HookParam> ParseRCode(std::wstring RCode)
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{
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std::wsmatch match;
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HookParam hp = {};
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hp.type |= DIRECT_READ;
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// {S|Q|V}
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switch (RCode[0])
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{
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case L'S':
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break;
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case L'Q':
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hp.type |= USING_UNICODE;
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break;
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case L'V':
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hp.type |= USING_UTF8;
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break;
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default:
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return {};
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}
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RCode.erase(0, 1);
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// [codepage#]
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if (std::regex_search(RCode, match, std::wregex(L"^([0-9]+)#")))
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{
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hp.codepage = std::stoi(match[1]);
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RCode.erase(0, match[0].length());
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}
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// [*deref_offset]
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if (RCode[0] == L'0') RCode.erase(0, 1); // Legacy
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if (std::regex_search(RCode, match, std::wregex(L"^\\*(-?[[:xdigit:]]+)")))
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{
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hp.type |= DATA_INDIRECT;
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hp.index = std::stoi(match[1], nullptr, 16);
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RCode.erase(0, match[0].length());
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}
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// @addr
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if (!std::regex_match(RCode, match, std::wregex(L"@([[:xdigit:]]+)"))) return {};
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hp.address = std::stoull(match[1], nullptr, 16);
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return hp;
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}
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std::optional<HookParam> ParseSCode(std::wstring SCode)
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{
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std::wsmatch match;
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HookParam hp = {};
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hp.type |= READ_SEARCH;
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// [codepage#]
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if (std::regex_search(SCode, match, std::wregex(L"^([0-9]+)#")))
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{
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hp.codepage = std::stoi(match[1]);
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SCode.erase(0, match[0].length());
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}
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else
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{
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hp.codepage = Host::defaultCodepage;
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}
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wcsncpy_s(hp.text, SCode.c_str(), MAX_MODULE_SIZE - 1);
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return hp;
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}
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std::optional<HookParam> ParseHCode(std::wstring HCode)
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{
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std::wsmatch match;
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HookParam hp = {};
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// {A|B|W|S|Q|V}
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switch (HCode[0])
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{
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case L'S':
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hp.type |= USING_STRING;
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break;
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case L'A':
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hp.type |= BIG_ENDIAN;
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hp.length_offset = 1;
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break;
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case L'B':
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hp.length_offset = 1;
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break;
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case L'Q':
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hp.type |= USING_STRING | USING_UNICODE;
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break;
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case L'W':
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hp.type |= USING_UNICODE;
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hp.length_offset = 1;
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break;
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case L'V':
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hp.type |= USING_STRING | USING_UTF8;
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break;
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default:
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return {};
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}
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HCode.erase(0, 1);
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// [N]
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if (HCode[0] == L'N')
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{
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hp.type |= NO_CONTEXT;
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HCode.erase(0, 1);
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}
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// [codepage#]
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if (std::regex_search(HCode, match, std::wregex(L"^([0-9]+)#")))
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{
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hp.codepage = std::stoi(match[1]);
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HCode.erase(0, match[0].length());
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}
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// data_offset
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if (!std::regex_search(HCode, match, std::wregex(L"^-?[[:xdigit:]]+"))) return {};
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hp.offset = std::stoi(match[0], nullptr, 16);
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HCode.erase(0, match[0].length());
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// [*deref_offset1]
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if (std::regex_search(HCode, match, std::wregex(L"^\\*(-?[[:xdigit:]]+)")))
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{
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hp.type |= DATA_INDIRECT;
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hp.index = std::stoi(match[1], nullptr, 16);
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HCode.erase(0, match[0].length());
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}
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// [:split_offset[*deref_offset2]]
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if (std::regex_search(HCode, match, std::wregex(L"^:(-?[[:xdigit:]]+)")))
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{
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hp.type |= USING_SPLIT;
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hp.split = std::stoi(match[1], nullptr, 16);
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HCode.erase(0, match[0].length());
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if (std::regex_search(HCode, match, std::wregex(L"^\\*(-?[[:xdigit:]]+)")))
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{
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hp.type |= SPLIT_INDIRECT;
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hp.split_index = std::stoi(match[1], nullptr, 16);
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HCode.erase(0, match[0].length());
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}
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}
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// @addr[:module[:func]]
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if (!std::regex_match(HCode, match, std::wregex(L"@([[:xdigit:]]+)(:.+?)?(:.+)?"))) return {};
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hp.address = std::stoull(match[1], nullptr, 16);
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if (match[2].matched)
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{
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hp.type |= MODULE_OFFSET;
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wcsncpy_s(hp.module, match[2].str().erase(0, 1).c_str(), MAX_MODULE_SIZE - 1);
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}
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if (match[3].matched)
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{
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hp.type |= FUNCTION_OFFSET;
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std::wstring func = match[3];
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strncpy_s(hp.function, std::string(func.begin(), func.end()).erase(0, 1).c_str(), MAX_MODULE_SIZE - 1);
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}
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// ITH has registers offset by 4 vs AGTH: need this to correct
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if (hp.offset < 0) hp.offset -= 4;
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if (hp.split < 0) hp.split -= 4;
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return hp;
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}
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std::wstring HexString(int64_t num) // only needed for signed nums
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{
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return (std::wstringstream() << std::uppercase << std::hex << (num < 0 ? "-" : "") << abs(num)).str();
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}
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std::wstring GenerateRCode(HookParam hp)
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{
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std::wstringstream RCode;
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RCode << "R";
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if (hp.type & USING_UNICODE)
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{
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RCode << "Q";
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}
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else
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{
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RCode << "S";
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if (hp.codepage != 0) RCode << hp.codepage << "#";
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}
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RCode << std::uppercase << std::hex;
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if (hp.type & DATA_INDIRECT) RCode << "*" << HexString(hp.index);
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RCode << "@" << hp.address;
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return RCode.str();
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}
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std::wstring GenerateHCode(HookParam hp, DWORD processId)
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{
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std::wstringstream HCode;
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HCode << "H";
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if (hp.type & USING_UNICODE)
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{
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if (hp.type & USING_STRING) HCode << "Q";
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else HCode << "W";
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}
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else
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{
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if (hp.type & USING_STRING) HCode << "S";
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else if (hp.type & BIG_ENDIAN) HCode << "A";
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else HCode << "B";
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}
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if (hp.type & NO_CONTEXT) HCode << "N";
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if (hp.text_fun || hp.filter_fun || hp.hook_fun) HCode << "X"; // no AGTH equivalent
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if (hp.codepage != 0 && !(hp.type & USING_UNICODE)) HCode << hp.codepage << "#";
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HCode << std::uppercase << std::hex;
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if (hp.offset < 0) hp.offset += 4;
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if (hp.split < 0) hp.split += 4;
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HCode << HexString(hp.offset);
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if (hp.type & DATA_INDIRECT) HCode << "*" << HexString(hp.index);
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if (hp.type & USING_SPLIT) HCode << ":" << HexString(hp.split);
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if (hp.type & SPLIT_INDIRECT) HCode << "*" << HexString(hp.split_index);
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// Attempt to make the address relative
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if (!(hp.type & MODULE_OFFSET))
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if (AutoHandle<> process = OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, FALSE, processId))
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if (MEMORY_BASIC_INFORMATION info = {}; VirtualQueryEx(process, (LPCVOID)hp.address, &info, sizeof(info)))
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if (auto moduleName = Util::GetModuleFilename(processId, (HMODULE)info.AllocationBase))
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{
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hp.type |= MODULE_OFFSET;
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hp.address -= (uint64_t)info.AllocationBase;
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wcsncpy_s(hp.module, moduleName->c_str() + moduleName->rfind(L'\\') + 1, MAX_MODULE_SIZE - 1);
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}
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HCode << "@" << hp.address;
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if (hp.type & MODULE_OFFSET) HCode << ":" << hp.module;
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if (hp.type & FUNCTION_OFFSET) HCode << ":" << hp.function;
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return HCode.str();
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}
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}
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namespace Util
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{
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std::optional<std::wstring> GetModuleFilename(DWORD processId, HMODULE module)
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{
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std::vector<wchar_t> buffer(MAX_PATH);
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if (AutoHandle<> process = OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, FALSE, processId))
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if (GetModuleFileNameExW(process, module, buffer.data(), MAX_PATH)) return buffer.data();
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return {};
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}
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std::optional<std::wstring> GetModuleFilename(HMODULE module)
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{
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std::vector<wchar_t> buffer(MAX_PATH);
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if (GetModuleFileNameW(module, buffer.data(), MAX_PATH)) return buffer.data();
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return {};
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}
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std::optional<std::wstring> GetClipboardText()
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{
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if (!IsClipboardFormatAvailable(CF_UNICODETEXT)) return {};
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if (!OpenClipboard(NULL)) return {};
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std::optional<std::wstring> text;
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if (AutoHandle<Functor<GlobalUnlock>> clipboard = GetClipboardData(CF_UNICODETEXT)) text = (wchar_t*)GlobalLock(clipboard);
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CloseClipboard();
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return text;
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}
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std::optional<std::wstring> StringToWideString(const std::string& text, UINT encoding)
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{
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std::vector<wchar_t> buffer(text.size() + 1);
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if (MultiByteToWideChar(encoding, 0, text.c_str(), -1, buffer.data(), buffer.size())) return buffer.data();
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return {};
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}
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bool RemoveRepetition(std::wstring& text)
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{
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wchar_t* end = text.data() + text.size();
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for (int len = text.size() / 3; len > 6; --len)
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if (wcsncmp(end - len * 3, end - len * 2, len) == 0 && wcsncmp(end - len * 3, end - len * 1, len) == 0)
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return RemoveRepetition(text = end - len), true;
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return false;
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}
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std::optional<HookParam> ParseCode(std::wstring code)
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{
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if (code[0] == L'/') code.erase(0, 1); // legacy/AGTH compatibility
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if (code[0] == L'R') return ParseRCode(code.erase(0, 1));
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else if (code[0] == L'S') return ParseSCode(code.erase(0, 1));
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else if (code[0] == L'H') return ParseHCode(code.erase(0, 1));
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return {};
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}
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std::wstring GenerateCode(HookParam hp, DWORD processId)
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{
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return hp.type & DIRECT_READ ? GenerateRCode(hp) : GenerateHCode(hp, processId);
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}
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TEST(
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assert(StringToWideString(u8"こんにちは").value() == L"こんにちは"),
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assert(ParseCode(L"/HQN936#-c*C:C*1C@4AA:gdi.dll:GetTextOutA")),
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assert(ParseCode(L"HB4@0")),
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assert(ParseCode(L"/RS*10@44")),
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assert(!ParseCode(L"HQ@4")),
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assert(!ParseCode(L"/RW@44")),
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assert(!ParseCode(L"/HWG@33"))
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);
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}
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