ARDecrypt: Resolve seedtable at compile-time
We can boot the formation of the table off to the compiler at compile-time, rather than building the table at run-time.
This commit is contained in:
Lioncash
parent
7e197186b9
commit
144f799bbb
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@ -9,6 +9,7 @@
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#include "Core/ARDecrypt.h"
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#include <algorithm>
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#include <array>
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#include <cstring>
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#include <string>
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#include <vector>
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@ -25,42 +26,40 @@
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namespace ActionReplay
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{
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// Alphanumeric filter for text<->bin conversion
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static const char* filter = "0123456789ABCDEFGHJKMNPQRTUVWXYZILOS";
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constexpr char filter[] = "0123456789ABCDEFGHJKMNPQRTUVWXYZILOS";
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static u32 genseeds[0x20];
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static const u8 gentable0[0x38] = {
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constexpr std::array<u8, 0x38> gentable0{
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0x39, 0x31, 0x29, 0x21, 0x19, 0x11, 0x09, 0x01, 0x3A, 0x32, 0x2A, 0x22, 0x1A, 0x12,
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0x0A, 0x02, 0x3B, 0x33, 0x2B, 0x23, 0x1B, 0x13, 0x0B, 0x03, 0x3C, 0x34, 0x2C, 0x24,
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0x3F, 0x37, 0x2F, 0x27, 0x1F, 0x17, 0x0F, 0x07, 0x3E, 0x36, 0x2E, 0x26, 0x1E, 0x16,
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0x0E, 0x06, 0x3D, 0x35, 0x2D, 0x25, 0x1D, 0x15, 0x0D, 0x05, 0x1C, 0x14, 0x0C, 0x04,
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};
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static const u8 gentable1[0x08] = {
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constexpr std::array<u8, 8> gentable1{
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0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01,
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};
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static const u8 gentable2[0x10] = {
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constexpr std::array<u8, 0x10> gentable2{
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0x01, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E, 0x0F, 0x11, 0x13, 0x15, 0x17, 0x19, 0x1B, 0x1C,
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};
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static const u8 gentable3[0x30] = {
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constexpr std::array<u8, 0x30> gentable3{
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0x0E, 0x11, 0x0B, 0x18, 0x01, 0x05, 0x03, 0x1C, 0x0F, 0x06, 0x15, 0x0A, 0x17, 0x13, 0x0C, 0x04,
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0x1A, 0x08, 0x10, 0x07, 0x1B, 0x14, 0x0D, 0x02, 0x29, 0x34, 0x1F, 0x25, 0x2F, 0x37, 0x1E, 0x28,
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0x33, 0x2D, 0x21, 0x30, 0x2C, 0x31, 0x27, 0x38, 0x22, 0x35, 0x2E, 0x2A, 0x32, 0x24, 0x1D, 0x20,
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};
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static const u16 crctable0[0x10] = {
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constexpr std::array<u16, 0x10> crctable0{
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0x0000, 0x1081, 0x2102, 0x3183, 0x4204, 0x5285, 0x6306, 0x7387,
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0x8408, 0x9489, 0xA50A, 0xB58B, 0xC60C, 0xD68D, 0xE70E, 0xF78F,
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};
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static const u16 crctable1[0x10] = {
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constexpr std::array<u16, 0x10> crctable1{
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0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF,
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0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7,
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};
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static const u8 gensubtable[0x08] = {
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constexpr std::array<u8, 8> gensubtable{
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0x34, 0x1C, 0x84, 0x9E, 0xFD, 0xA4, 0xB6, 0x7B,
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};
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static const u32 table0[0x40] = {
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constexpr std::array<u32, 0x40> table0{
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0x01010400, 0x00000000, 0x00010000, 0x01010404, 0x01010004, 0x00010404, 0x00000004, 0x00010000,
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0x00000400, 0x01010400, 0x01010404, 0x00000400, 0x01000404, 0x01010004, 0x01000000, 0x00000004,
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0x00000404, 0x01000400, 0x01000400, 0x00010400, 0x00010400, 0x01010000, 0x01010000, 0x01000404,
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@ -70,7 +69,7 @@ static const u32 table0[0x40] = {
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0x01010404, 0x00010004, 0x01010000, 0x01000404, 0x01000004, 0x00000404, 0x00010404, 0x01010400,
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0x00000404, 0x01000400, 0x01000400, 0x00000000, 0x00010004, 0x00010400, 0x00000000, 0x01010004,
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};
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static const u32 table1[0x40] = {
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constexpr std::array<u32, 0x40> table1{
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0x80108020, 0x80008000, 0x00008000, 0x00108020, 0x00100000, 0x00000020, 0x80100020, 0x80008020,
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0x80000020, 0x80108020, 0x80108000, 0x80000000, 0x80008000, 0x00100000, 0x00000020, 0x80100020,
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0x00108000, 0x00100020, 0x80008020, 0x00000000, 0x80000000, 0x00008000, 0x00108020, 0x80100000,
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@ -80,7 +79,7 @@ static const u32 table1[0x40] = {
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0x00008020, 0x80108000, 0x00100000, 0x80000020, 0x00100020, 0x80008020, 0x80000020, 0x00100020,
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0x00108000, 0x00000000, 0x80008000, 0x00008020, 0x80000000, 0x80100020, 0x80108020, 0x00108000,
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};
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static const u32 table2[0x40] = {
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constexpr std::array<u32, 0x40> table2{
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0x00000208, 0x08020200, 0x00000000, 0x08020008, 0x08000200, 0x00000000, 0x00020208, 0x08000200,
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0x00020008, 0x08000008, 0x08000008, 0x00020000, 0x08020208, 0x00020008, 0x08020000, 0x00000208,
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0x08000000, 0x00000008, 0x08020200, 0x00000200, 0x00020200, 0x08020000, 0x08020008, 0x00020208,
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@ -90,7 +89,7 @@ static const u32 table2[0x40] = {
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0x08000208, 0x00020000, 0x08000000, 0x08020208, 0x00000008, 0x00020208, 0x00020200, 0x08000008,
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0x08020000, 0x08000208, 0x00000208, 0x08020000, 0x00020208, 0x00000008, 0x08020008, 0x00020200,
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};
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static const u32 table3[0x40] = {
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constexpr std::array<u32, 0x40> table3{
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0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802080, 0x00800081, 0x00800001, 0x00002001,
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0x00000000, 0x00802000, 0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00800080, 0x00800001,
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0x00000001, 0x00002000, 0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002001, 0x00002080,
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@ -100,7 +99,7 @@ static const u32 table3[0x40] = {
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0x00802081, 0x00000081, 0x00000001, 0x00002000, 0x00800001, 0x00002001, 0x00802080, 0x00800081,
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0x00002001, 0x00002080, 0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002000, 0x00802080,
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};
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static const u32 table4[0x40] = {
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constexpr std::array<u32, 0x40> table4{
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0x00000100, 0x02080100, 0x02080000, 0x42000100, 0x00080000, 0x00000100, 0x40000000, 0x02080000,
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0x40080100, 0x00080000, 0x02000100, 0x40080100, 0x42000100, 0x42080000, 0x00080100, 0x40000000,
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0x02000000, 0x40080000, 0x40080000, 0x00000000, 0x40000100, 0x42080100, 0x42080100, 0x02000100,
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@ -110,7 +109,7 @@ static const u32 table4[0x40] = {
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0x42080100, 0x00080100, 0x42000000, 0x42080100, 0x02080000, 0x00000000, 0x40080000, 0x42000000,
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0x00080100, 0x02000100, 0x40000100, 0x00080000, 0x00000000, 0x40080000, 0x02080100, 0x40000100,
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};
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static const u32 table5[0x40] = {
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constexpr std::array<u32, 0x40> table5{
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0x20000010, 0x20400000, 0x00004000, 0x20404010, 0x20400000, 0x00000010, 0x20404010, 0x00400000,
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0x20004000, 0x00404010, 0x00400000, 0x20000010, 0x00400010, 0x20004000, 0x20000000, 0x00004010,
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0x00000000, 0x00400010, 0x20004010, 0x00004000, 0x00404000, 0x20004010, 0x00000010, 0x20400010,
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@ -120,7 +119,7 @@ static const u32 table5[0x40] = {
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0x00404010, 0x20404000, 0x00000000, 0x20400010, 0x00000010, 0x00004000, 0x20400000, 0x00404010,
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0x00004000, 0x00400010, 0x20004010, 0x00000000, 0x20404000, 0x20000000, 0x00400010, 0x20004010,
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};
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static const u32 table6[0x40] = {
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constexpr std::array<u32, 0x40> table6{
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0x00200000, 0x04200002, 0x04000802, 0x00000000, 0x00000800, 0x04000802, 0x00200802, 0x04200800,
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0x04200802, 0x00200000, 0x00000000, 0x04000002, 0x00000002, 0x04000000, 0x04200002, 0x00000802,
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0x04000800, 0x00200802, 0x00200002, 0x04000800, 0x04000002, 0x04200000, 0x04200800, 0x00200002,
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@ -130,7 +129,7 @@ static const u32 table6[0x40] = {
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0x00000802, 0x04000002, 0x04200802, 0x04200000, 0x00200800, 0x00000000, 0x00000002, 0x04200802,
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0x00000000, 0x00200802, 0x04200000, 0x00000800, 0x04000002, 0x04000800, 0x00000800, 0x00200002,
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};
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static const u32 table7[0x40] = {
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constexpr std::array<u32, 0x40> table7{
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0x10001040, 0x00001000, 0x00040000, 0x10041040, 0x10000000, 0x10001040, 0x00000040, 0x10000000,
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0x00040040, 0x10040000, 0x10041040, 0x00041000, 0x10041000, 0x00041040, 0x00001000, 0x00000040,
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0x10040000, 0x10000040, 0x10001000, 0x00001040, 0x00041000, 0x00040040, 0x10040040, 0x10041000,
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@ -141,26 +140,30 @@ static const u32 table7[0x40] = {
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0x10041040, 0x00041000, 0x00041000, 0x00001040, 0x00001040, 0x00040040, 0x10000000, 0x10041000,
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};
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static void generateseeds(u32* seeds, const u8* seedtable, u8 doreverse)
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{
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u32 tmp3;
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u8 array0[0x38], array1[0x38], array2[0x08];
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u8 tmp, tmp2;
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using Seeds = std::array<u32, 0x30>;
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for (int i = 0; i < 0x38; ++i)
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constexpr Seeds genseeds = [] {
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std::array<u8, 0x38> array0{};
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std::array<u8, 0x38> array1{};
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std::array<u8, 0x38> array2{};
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Seeds seeds{};
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for (size_t i = 0; i < array0.size(); ++i)
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{
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tmp = (gentable0[i] - 1);
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array0[i] = ((u32)(0 - (seedtable[tmp >> 3] & gentable1[tmp & 7])) >> 31);
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const auto tmp = u8(gentable0[i] - 1);
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array0[i] = (u32(0 - (gensubtable[tmp >> 3] & gentable1[tmp & 7])) >> 31);
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}
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for (int i = 0; i < 0x10; ++i)
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{
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memset(array2, 0, 8);
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tmp2 = gentable2[i];
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for (u32 j = 0; j < 8; j++)
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array2[j] = 0;
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for (int j = 0; j < 0x38; j++)
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const u8 tmp2 = gentable2[i];
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for (u32 j = 0; j < 0x38; j++)
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{
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tmp = (tmp2 + j);
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auto tmp = u8(tmp2 + j);
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if (j > 0x1B)
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{
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@ -176,25 +179,24 @@ static void generateseeds(u32* seeds, const u8* seedtable, u8 doreverse)
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array1[j] = array0[tmp];
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}
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for (int j = 0; j < 0x30; j++)
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for (u32 j = 0; j < 0x30; j++)
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{
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if (!array1[gentable3[j] - 1])
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if (array1[gentable3[j] - 1] == 0)
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{
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continue;
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}
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tmp = (((j * 0x2AAB) >> 16) - (j >> 0x1F));
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const u8 tmp = (((j * 0x2AAB) >> 16) - (j >> 0x1F));
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array2[tmp] |= (gentable1[j - (tmp * 6)] >> 2);
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}
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seeds[i << 1] = ((array2[0] << 24) | (array2[2] << 16) | (array2[4] << 8) | array2[6]);
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seeds[(i << 1) + 1] = ((array2[1] << 24) | (array2[3] << 16) | (array2[5] << 8) | array2[7]);
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}
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if (!doreverse)
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{
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int j = 0x1F;
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for (int i = 0; i < 16; i += 2)
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{
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tmp3 = seeds[i];
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u32 tmp3 = seeds[i];
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seeds[i] = seeds[j - 1];
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seeds[j - 1] = tmp3;
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@ -203,13 +205,9 @@ static void generateseeds(u32* seeds, const u8* seedtable, u8 doreverse)
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seeds[j] = tmp3;
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j -= 2;
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}
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}
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}
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static void buildseeds()
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{
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generateseeds(genseeds, gensubtable, 0);
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}
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return seeds;
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}();
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static void getcode(const u32* src, u32* addr, u32* val)
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{
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@ -352,17 +350,18 @@ static bool getbitstring(u32* ctrl, u32* out, u8 len)
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static bool batchdecrypt(u32* codes, u16 size)
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{
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u32 tmp, *ptr = codes;
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u32 tmparray[4] = {0}, tmparray2[8] = {0};
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u32* ptr = codes;
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std::array<u32, 4> tmparray{};
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std::array<u32, 8> tmparray2{};
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// Not required
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// if (size & 1) return 0;
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// if (!size) return 0;
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tmp = (size >> 1);
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u32 tmp = (size >> 1);
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while (tmp--)
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{
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decryptcode(genseeds, ptr);
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decryptcode(genseeds.data(), ptr);
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ptr += 2;
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}
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@ -370,11 +369,11 @@ static bool batchdecrypt(u32* codes, u16 size)
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tmparray[1] = 0;
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tmparray[2] = 4; // Skip crc
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tmparray[3] = size;
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getbitstring(tmparray, tmparray2 + 1, 11); // Game id
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getbitstring(tmparray, tmparray2 + 2, 17); // Code id
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getbitstring(tmparray, tmparray2 + 3, 1); // Master code
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getbitstring(tmparray, tmparray2 + 4, 1); // Unknown
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getbitstring(tmparray, tmparray2 + 5, 2); // Region
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getbitstring(tmparray.data(), &tmparray2[1], 11); // Game id
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getbitstring(tmparray.data(), &tmparray2[2], 17); // Code id
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getbitstring(tmparray.data(), &tmparray2[3], 1); // Master code
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getbitstring(tmparray.data(), &tmparray2[4], 1); // Unknown
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getbitstring(tmparray.data(), &tmparray2[5], 2); // Region
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// Grab gameid and region from the last decrypted code
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// TODO: Maybe check this against Dolphin's GameID? - "code is for wrong game" type msg
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@ -460,25 +459,21 @@ static int alphatobin(u32* dst, const std::vector<std::string>& alpha, int size)
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void DecryptARCode(std::vector<std::string> vCodes, std::vector<AREntry>* ops)
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{
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// The almighty buildseeds() function!! without this, the crypto routines are useless
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buildseeds();
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u32 uCodes[1200];
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u32 ret;
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std::array<u32, 1200> uCodes;
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for (std::string& s : vCodes)
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{
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std::transform(s.begin(), s.end(), s.begin(), toupper);
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}
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ret = alphatobin(uCodes, vCodes, (int)vCodes.size());
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const u32 ret = alphatobin(uCodes.data(), vCodes, (int)vCodes.size());
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if (ret)
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{
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// Return value is index + 1, 0 being the success flag value.
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PanicAlertT("Action Replay Code Decryption Error:\nParity Check Failed\n\nCulprit Code:\n%s",
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vCodes[ret - 1].c_str());
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}
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else if (!batchdecrypt(uCodes, (u16)vCodes.size() << 1))
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else if (!batchdecrypt(uCodes.data(), (u16)vCodes.size() << 1))
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{
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// Commented out since we just send the code anyways and hope for the best XD
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// PanicAlert("Action Replay Code Decryption Error:\nCRC Check Failed\n\n"
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