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authorjbzdarkid <jbzdarkid@gmail.com>2018-12-09 11:48:17 -0800
committerjbzdarkid <jbzdarkid@gmail.com>2018-12-09 11:48:17 -0800
commit4ad724eaae7be3780b5fb891b391bbf4ef26f410 (patch)
treed4daf1c5a8036098ee7dd4a52690802dbacaf3c3 /Source/ChallengeRandomizer.cpp
parentf485927337c329a4a691500a1b6c18c763863bb4 (diff)
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Improve internals of sigscanning, fix a small overwrite bug
Diffstat (limited to 'Source/ChallengeRandomizer.cpp')
-rw-r--r--Source/ChallengeRandomizer.cpp265


1 files changed, 95 insertions, 170 deletions
diff --git a/Source/ChallengeRandomizer.cpp b/Source/ChallengeRandomizer.cpp
index 44886b7..fcd4e4a 100644
--- a/Source/ChallengeRandomizer.cpp
+++ b/Source/ChallengeRandomizer.cpp

@@ -1,21 +1,6 @@

1#include "ChallengeRandomizer.h"
1#include "ChallengeRandomizer.h"

2#include <iostream>
2#include <iostream>

3
3

4int find(const std::vector<byte> &data, const std::vector<byte>& search, size_t startIndex = 0) {


5        for (size_t i=startIndex; i<data.size() - search.size(); i++) {


6                bool match = true;


7                for (size_t j=0; j<search.size(); j++) {


8                        if (data[i+j] == search[j]) {


9                                continue;


10                        }


11                        match = false;


12                        break;


13                }


14                if (match) return static_cast<int>(i);


15        }


16        return -1;


17}


18


19// Reads the (relative!) address of the RNG, then shifts it to point at RNG2
4// Reads the (relative!) address of the RNG, then shifts it to point at RNG2

20void ChallengeRandomizer::AdjustRng(int offset) {
5void ChallengeRandomizer::AdjustRng(int offset) {

21        int currentRng = _memory->ReadData<int>({offset}, 0x1)[0];
6        int currentRng = _memory->ReadData<int>({offset}, 0x1)[0];
@@ -33,164 +18,104 @@ ChallengeRandomizer::ChallengeRandomizer(const std::shared_ptr<Memory>& memory,

33        if (!alreadyInjected) _memory->WriteData<int>({GLOBALS + 0x30}, {RNG_ADDR + 4});
18        if (!alreadyInjected) _memory->WriteData<int>({GLOBALS + 0x30}, {RNG_ADDR + 4});

34        _memory->WriteData<int>({GLOBALS + 0x30, 0}, {seed});
19        _memory->WriteData<int>({GLOBALS + 0x30, 0}, {seed});

35
20

36        int do_success_side_effects = -1;
21        // do_success_side_effects

37        int reveal_exit_hall = -1;
22        _memory->AddSigScan({0xFF, 0xC8, 0x99, 0x2B, 0xC2, 0xD1, 0xF8, 0x8B, 0xD0}, [&](int index) {

38        int begin_endgame_1 = -1;
23                if (GLOBALS == 0x5B28C0) { // Version differences

39
24                        index += 0x3E;

40        _memory->SigScan([&](int offset, const std::vector<byte>& data) {
25                } else if (GLOBALS == 0x62A080) {

41                // This injection ensures that the seed is set every time the challenge is started.
26                        index += 0x42;

42                // We always do this sigscan since it affects the seed.
27                }

43                if (do_success_side_effects == -1) {
28                _memory->WriteData<byte>({index}, {

44                        int index = find(data, {0xFF, 0xC8, 0x99, 0x2B, 0xC2, 0xD1, 0xF8, 0x8B, 0xD0});
29                        0x8B, 0x0D, 0x00, 0x00, 0x00, 0x00,                     // mov ecx, [0x00000000] ;This is going to be the address of the custom RNG

45                        if (index != -1) {
30                        0x67, 0xC7, 0x01, 0x00, 0x00, 0x00, 0x00,       // mov dword ptr ds:[ecx], 0x00000000 ;This is going to be the seed value

46                                do_success_side_effects = offset + index + 0x3E;
31                        0x48, 0x83, 0xF8, 0x02,                                         // cmp rax, 0x2 ;This is the short solve on the record player (which turns it off)

47                                if (GLOBALS == 0x62A080) do_success_side_effects += 4; // There's an extra 4 opcodes in the new version
32                        0x90, 0x90, 0x90                                                        // nop nop nop

48                                _memory->WriteData<byte>({do_success_side_effects}, {
33                });

49                                        0x8B, 0x0D, 0x00, 0x00, 0x00, 0x00,                     // mov ecx, [0x00000000] ;This is going to be the address of the custom RNG
34                int target = (GLOBALS + 0x30) - (index + 0x6); // +6 is for the length of the line

50                                        0x67, 0xC7, 0x01, 0x00, 0x00, 0x00, 0x00,       // mov dword ptr ds:[ecx], 0x00000000 ;This is going to be the seed value
35                _memory->WriteData<int>({index + 0x2}, {target});

51                                        0x48, 0x83, 0xF8, 0x02,                                         // cmp rax, 0x2 ;This is the short solve on the record player (which turns it off)
36                _memory->WriteData<int>({index + 0x9}, {seed});

52                                        0x90, 0x90, 0x90                                                        // nop nop nop


53                                });


54                                int target = (GLOBALS + 0x30) - (do_success_side_effects + 0x6); // +6 is for the length of the line


55                                _memory->WriteData<int>({do_success_side_effects + 0x2}, {target});


56                                _memory->WriteData<int>({do_success_side_effects + 0x9}, {seed});


57                        }


58                }


59


60                // BLEH.


61                if (reveal_exit_hall == -1) {


62                        int index = find(data, {0x45, 0x8B, 0xF7, 0x48, 0x8B, 0x4D});


63                        if (index != -1) {


64                                reveal_exit_hall = offset + index;


65                                _memory->WriteData<byte>({reveal_exit_hall + 0x15}, {0xEB});


66                        }


67                }


68                if (begin_endgame_1 == -1) {


69                        int index = find(data, {0x83, 0x7C, 0x01, 0xD0, 0x04});


70                        if (index != -1) {


71                                begin_endgame_1 = offset + index;


72                                if (GLOBALS == 0x5B28C0) { // Version differences :/


73                                        begin_endgame_1 += 0x75;


74                                } else if (GLOBALS == 0x62A080) {


75                                        begin_endgame_1 += 0x86;


76                                }


77                                _memory->WriteData<byte>({begin_endgame_1}, {0xEB});


78                        }


79                }


80        });
37        });

81
38

82        if (!alreadyInjected) HandleSigScans();
39        // reveal_exit_hall

83}
40        _memory->AddSigScan({0x45, 0x8B, 0xF7, 0x48, 0x8B, 0x4D}, [&](int index){


41                _memory->WriteData<byte>({index + 0x15}, {0xEB});


42        });

84
43

85void ChallengeRandomizer::HandleSigScans() {
44        // begin_endgame_1

86        static int shuffle_integers = -1;
45        _memory->AddSigScan({0x83, 0x7C, 0x01, 0xD0, 0x04}, [&](int index){

87        static int shuffle_int = -1;
46                if (GLOBALS == 0x5B28C0) { // Version differences

88        static int cut_random_edges = -1;
47                        index += 0x75;

89        static int get_empty_decoration_slot = -1;
48                } else if (GLOBALS == 0x62A080) {

90        static int get_empty_dot_spot = -1;
49                        index += 0x86;

91        static int add_exactly_this_many_bisection_dots = -1;
50                }

92        static int make_a_shaper = -1;
51                _memory->WriteData<byte>({index}, {0xEB});

93        static int init_pattern_data_lotus = -1;
52        });

94        static int reroll_lotus_eater_stuff = -1;


95        static int do_lotus_minutes = -1;


96        static int do_lotus_tenths = -1;


97        static int do_lotus_eighths = -1;


98
53

99        _memory->SigScan([&](int offset, const std::vector<byte>& data) {
54        if (!alreadyInjected) {

100                if (shuffle_integers == -1) {
55                // shuffle_integers

101                        int index = find(data, {0x48, 0x89, 0x5C, 0x24, 0x10, 0x56, 0x48, 0x83, 0xEC, 0x20, 0x48, 0x63, 0xDA, 0x48, 0x8B, 0xF1, 0x83, 0xFB, 0x01});
56                _memory->AddSigScan({0x48, 0x89, 0x5C, 0x24, 0x10, 0x56, 0x48, 0x83, 0xEC, 0x20, 0x48, 0x63, 0xDA, 0x48, 0x8B, 0xF1, 0x83, 0xFB, 0x01}, [&](int index) {

102                        if (index != -1) {
57                        AdjustRng(index + 0x23);

103                                shuffle_integers = offset + index;
58                });

104                                AdjustRng(shuffle_integers + 0x23);


105                        }


106                }


107                // shuffle<int>
59                // shuffle<int>

108                if (shuffle_int == -1) {
60                _memory->AddSigScan({0x33, 0xF6, 0x48, 0x8B, 0xD9, 0x39, 0x31, 0x7E, 0x51}, [&](int index) {

109                        int index = find(data, {0x33, 0xF6, 0x48, 0x8B, 0xD9, 0x39, 0x31, 0x7E, 0x51});
61                        AdjustRng(index - 0x4);

110                        if (index != -1) {
62                });

111                                shuffle_int = offset + index - 0x16;
63                // cut_random_edges

112                                AdjustRng(shuffle_int + 0x12);
64                _memory->AddSigScan({0x89, 0x44, 0x24, 0x3C, 0x33, 0xC0, 0x85, 0xC0, 0x75, 0xFA}, [&](int index) {

113                        }
65                        AdjustRng(index + 0x3B);

114                }
66                });

115                if (cut_random_edges == -1) {
67                // get_empty_decoration_slot

116                        int index = find(data, {0x89, 0x44, 0x24, 0x3C, 0x33, 0xC0, 0x85, 0xC0, 0x75, 0xFA});
68                _memory->AddSigScan({0x42, 0x83, 0x3C, 0x80, 0x00, 0x75, 0xDF}, [&](int index) {

117                        if (index != -1) {
69                        AdjustRng(index - 0x17);

118                                cut_random_edges = offset + index - 0x22;
70                });

119                                AdjustRng(cut_random_edges + 0x5D);
71                // get_empty_dot_spot

120                        }
72                _memory->AddSigScan({0xF7, 0xF3, 0x85, 0xD2, 0x74, 0xEC}, [&](int index) {

121                }
73                        AdjustRng(index - 0xB);

122                if (get_empty_decoration_slot == -1) {
74                });

123                        int index = find(data, {0x42, 0x83, 0x3C, 0x80, 0x00, 0x75, 0xDF});
75                // add_exactly_this_many_bisection_dots

124                        if (index != -1) {
76                _memory->AddSigScan({0x48, 0x8B, 0xB4, 0x24, 0xB8, 0x00, 0x00, 0x00, 0x48, 0x8B, 0xBC, 0x24, 0xB0, 0x00, 0x00, 0x00}, [&](int index) {

125                                get_empty_decoration_slot = offset + index - 0x2D;
77                        AdjustRng(index - 0x4);

126                                AdjustRng(get_empty_decoration_slot + 0x16);
78                });

127                        }
79                // make_a_shaper

128                }
80                _memory->AddSigScan({0xF7, 0xE3, 0xD1, 0xEA, 0x8D, 0x0C, 0x52}, [&](int index) {

129                if (get_empty_dot_spot == -1) {
81                        AdjustRng(index - 0x10);

130                        int index = find(data, {0xF7, 0xF3, 0x85, 0xD2, 0x74, 0xEC});
82                        AdjustRng(index + 0x1C);

131                        if (index != -1) {
83                        AdjustRng(index + 0x49);

132                                get_empty_dot_spot = offset + index - 0x2E;
84                });

133                                AdjustRng(get_empty_dot_spot + 0x23);
85                // Entity_Machine_Panel::init_pattern_data_lotus

134                        }
86                _memory->AddSigScan({0x40, 0x55, 0x56, 0x48, 0x8D, 0x6C, 0x24, 0xB1}, [&](int index) {

135                }
87                        AdjustRng(index + 0x433);

136                if (add_exactly_this_many_bisection_dots == -1) {
88                        AdjustRng(index + 0x45B);

137                        int index = find(data, {0x48, 0x8B, 0xB4, 0x24, 0xB8, 0x00, 0x00, 0x00, 0x48, 0x8B, 0xBC, 0x24, 0xB0, 0x00, 0x00, 0x00});
89                        AdjustRng(index + 0x5A7);

138                        if (index != -1) {
90                        AdjustRng(index + 0x5D6);

139                                add_exactly_this_many_bisection_dots = offset + index - 0x20;
91                        AdjustRng(index + 0x6F6);

140                                AdjustRng(add_exactly_this_many_bisection_dots + 0x1C);
92                        AdjustRng(index + 0xD17);

141                        }
93                        AdjustRng(index + 0xFDA);

142                }
94                });

143                if (make_a_shaper == -1) {
95                // Entity_Record_Player::reroll_lotus_eater_stuff

144                        int index = find(data, {0xF7, 0xE3, 0xD1, 0xEA, 0x8D, 0x0C, 0x52});
96                _memory->AddSigScan({0xB8, 0xAB, 0xAA, 0xAA, 0xAA, 0x41, 0xC1, 0xE8}, [&](int index) {

145                        if (index != -1) {
97                        AdjustRng(index - 0x52);

146                                make_a_shaper = offset + index - 0x19;
98                        AdjustRng(index - 0xB);

147                                AdjustRng(make_a_shaper + 0x9);
99                });

148                                AdjustRng(make_a_shaper + 0x35);
100

149                                AdjustRng(make_a_shaper + 0x62);


150                        }


151                }


152                if (/*Entity_Machine_Panel::*/init_pattern_data_lotus == -1) {


153                        int index = find(data, {0x40, 0x55, 0x56, 0x48, 0x8D, 0x6C, 0x24, 0xB1});


154                        if (index != -1) {


155                                init_pattern_data_lotus = offset + index;


156                                AdjustRng(init_pattern_data_lotus + 0x433);


157                                AdjustRng(init_pattern_data_lotus + 0x45B);


158                                AdjustRng(init_pattern_data_lotus + 0x5A7);


159                                AdjustRng(init_pattern_data_lotus + 0x5D6);


160                                AdjustRng(init_pattern_data_lotus + 0x6F6);


161                                AdjustRng(init_pattern_data_lotus + 0xD17);


162                                AdjustRng(init_pattern_data_lotus + 0xFDA);


163                        }


164                }


165                if (/*Entity_Record_Player::*/reroll_lotus_eater_stuff == -1) {


166                        int index = find(data, {0xB8, 0xAB, 0xAA, 0xAA, 0xAA, 0x41, 0xC1, 0xE8});


167                        if (index != -1) {


168                                reroll_lotus_eater_stuff = offset + index - 0x37;


169                                AdjustRng(reroll_lotus_eater_stuff + 0x24);


170                                AdjustRng(reroll_lotus_eater_stuff + 0x6B);


171                        }


172                }


173                // These disable the random locations on timer panels, which would otherwise increment the RNG.
101                // These disable the random locations on timer panels, which would otherwise increment the RNG.

174                if (do_lotus_minutes == -1) {
102                // I'm writing 31 C0 (xor eax, eax), then 3 NOPs, which pretends the RNG returns 0.

175                        int index = find(data, {0x0F, 0xBE, 0x6C, 0x08, 0xFF, 0x45});
103                // do_lotus_minutes

176                        if (index != -1) {
104                _memory->AddSigScan({0x0F, 0xBE, 0x6C, 0x08, 0xFF, 0x45}, [&](int index) {

177                                do_lotus_minutes = offset + index - 0x2B;
105                        _memory->WriteData<byte>({index + 0x410}, {0x31, 0xC0, 0x90, 0x90, 0x90});

178                                _memory->WriteData<byte>({do_lotus_minutes + 0x43B}, {0x31, 0xC0, 0x90, 0x90, 0x90}); // xor eax, eax ;RNG returns 0
106                });

179                        }
107                // do_lotus_tenths

180                }
108                _memory->AddSigScan({0x00, 0x04, 0x00, 0x00, 0x41, 0x8D, 0x50, 0x09}, [&](int index) {

181                if (do_lotus_tenths == -1) {
109                        _memory->WriteData<byte>({index + 0xA2}, {0x31, 0xC0, 0x90, 0x90, 0x90});

182                        int index = find(data, {0x00, 0x04, 0x00, 0x00, 0x41, 0x8D, 0x50, 0x09});
110                });

183                        if (index != -1) {
111                // do_lotus_eighths

184                                do_lotus_tenths = offset + index - 0x61;
112                _memory->AddSigScan({0x75, 0xF5, 0x0F, 0xBE, 0x44, 0x08, 0xFF}, [&](int index) {

185                                _memory->WriteData<byte>({do_lotus_tenths + 0x103}, {0x31, 0xC0, 0x90, 0x90, 0x90}); // xor eax, eax ;RNG returns 0
113                        _memory->WriteData<byte>({index + 0x1AE}, {0x31, 0xC0, 0x90, 0x90, 0x90});

186                        }
114                });

187                }
115        }

188                if (do_lotus_eighths == -1) {
116

189                        int index = find(data, {0x75, 0xF5, 0x0F, 0xBE, 0x44, 0x08, 0xFF});
117        int failed = _memory->ExecuteSigScans();

190                        if (index != -1) {
118        if (failed != 0) {

191                                do_lotus_eighths = offset + index - 0x39;
119                std::cout << "Failed " << failed << " sigscans";

192                                _memory->WriteData<byte>({do_lotus_eighths + 0x1E7}, {0x31, 0xC0, 0x90, 0x90, 0x90}); // xor eax, eax ;RNG returns 0
120        }

193                        }
121}

194                }


195        });


196}
\ No newline at end of file

 

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