SabreTools/NDecrypt
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3 Commits
0.1.2 ... 0.1.3d

Author SHA1 Message Date
Matt Nadareski
0190f3d316 Encrypt, comments 2019-04-07 02:10:16 -07:00
Matt Nadareski
5c6b303d41 DoFinal 2019-04-07 02:03:44 -07:00
Matt Nadareski
0800d93d22 Notes and minor 2019-04-07 01:32:04 -07:00
2 changed files with 25 additions and 27 deletions
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5
3DSDecrypt/Data/Constants.cs
View File

@@ -9,6 +9,9 @@ namespace ThreeDS.Data
public static byte[] ExefsCounter = new byte[] { 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
public static byte[] RomfsCounter = new byte[] { 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
// Note: BigInteger requires the 0x00 at the end of each string in order to preserve the sign value
// Note: BigInteger requires that the values be in little endian format, the values in
// Big Endian - 0x1F, 0xF9, 0xE9, 0xAA, 0xC5, 0xFE, 0x04, 0x08, 0x02, 0x45, 0x91, 0xDC, 0x5D, 0x52, 0x76, 0x8A
// Little Endian - 0x8A, 0x76, 0x52, 0x5D, 0xDC, 0x91, 0x45, 0x02, 0x08, 0x04, 0xFE, 0xC5, 0xAA, 0xE9, 0xF9, 0x1F
public static BigInteger AESHardwareConstant = new BigInteger(new byte[] { 0x8A, 0x76, 0x52, 0x5D, 0xDC, 0x91, 0x45, 0x02, 0x08, 0x04, 0xFE, 0xC5, 0xAA, 0xE9, 0xF9, 0x1F });
@@ -37,7 +40,7 @@ namespace ThreeDS.Data
#endregion
#region Dev Keys (Must be converted to LE)
#region Dev Keys
// Dev KeyX 0x18 (New 3DS 9.3)
// Big Endian - 0x30, 0x4B, 0xF1, 0x46, 0x83, 0x72, 0xEE, 0x64, 0x11, 0x5E, 0xBD, 0x40, 0x93, 0xD8, 0x42, 0x76

47
3DSDecrypt/ThreeDSTool.cs
View File

@@ -122,7 +122,7 @@ namespace ThreeDS
var str = BitConverter.ToString(plainIV).Replace("-", "");
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(false, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), plainIV));
Console.WriteLine("Partition {0} ExeFS: Decrypting: ExHeader", p);
@@ -137,7 +137,7 @@ namespace ThreeDS
f.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits) * header.SectorSize, SeekOrigin.Begin);
g.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits) * header.SectorSize, SeekOrigin.Begin);
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(false, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), exefsIV));
g.Write(exefsctrmode2C.ProcessBytes(f.ReadBytes((int)header.SectorSize)));
@@ -162,10 +162,10 @@ namespace ThreeDS
byte[] exefsIVWithOffsetForHeader = AddToByteArray(exefsIV, (int)ctroffset);
var exefsctrmode = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var exefsctrmode = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode.Init(false, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey)), exefsIVWithOffsetForHeader));
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(true, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), exefsIVWithOffsetForHeader));
f.BaseStream.Seek((((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits) + 1) * header.SectorSize) + fileHeader.FileOffset, SeekOrigin.Begin);
@@ -183,7 +183,7 @@ namespace ThreeDS
if (datalenB > 0)
{
g.Write(exefsctrmode2C.ProcessBytes(exefsctrmode.ProcessBytes(f.ReadBytes((int)datalenB))));
g.Write(exefsctrmode2C.DoFinal(exefsctrmode.DoFinal(f.ReadBytes((int)datalenB))));
g.Flush();
}
@@ -199,7 +199,7 @@ namespace ThreeDS
byte[] exefsIVWithOffset = AddToByteArray(exefsIV, ctroffsetE);
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(false, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), exefsIVWithOffset));
f.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits + 1) * header.SectorSize, SeekOrigin.Begin);
@@ -215,7 +215,7 @@ namespace ThreeDS
}
if (exefsSizeB > 0)
{
g.Write(exefsctrmode2C.ProcessBytes(f.ReadBytes(exefsSizeB)));
g.Write(exefsctrmode2C.DoFinal(f.ReadBytes(exefsSizeB)));
g.Flush();
}
@@ -231,7 +231,7 @@ namespace ThreeDS
int romfsSizeM = (int)(partitionHeader.RomFSSizeInMediaUnits * header.SectorSize) / (1024 * 1024);
int romfsSizeB = (int)(partitionHeader.RomFSSizeInMediaUnits * header.SectorSize) % (1024 * 1024);
var romfsctrmode = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var romfsctrmode = CipherUtilities.GetCipher("AES/CTR");
romfsctrmode.Init(false, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey)), romfsIV));
f.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.RomFSOffsetInMediaUnits) * header.SectorSize, SeekOrigin.Begin);
@@ -247,7 +247,7 @@ namespace ThreeDS
}
if (romfsSizeB > 0)
{
g.Write(romfsctrmode.ProcessBytes(f.ReadBytes(romfsSizeB)));
g.Write(romfsctrmode.DoFinal(f.ReadBytes(romfsSizeB)));
g.Flush();
}
@@ -277,9 +277,6 @@ namespace ThreeDS
}
}
/// <summary>
/// Writes wrong header values
/// </summary>
public void Encrypt()
{
if (!File.Exists(filename))
@@ -386,7 +383,7 @@ namespace ThreeDS
var str = BitConverter.ToString(plainIV).Replace("-", "");
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(true, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), plainIV));
Console.WriteLine("Partition {0} ExeFS: Encrypting: ExHeader", p);
@@ -401,7 +398,7 @@ namespace ThreeDS
f.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits) * header.SectorSize, SeekOrigin.Begin);
g.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits) * header.SectorSize, SeekOrigin.Begin);
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(true, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), exefsIV));
g.Write(exefsctrmode2C.ProcessBytes(f.ReadBytes((int)header.SectorSize)));
@@ -426,10 +423,10 @@ namespace ThreeDS
byte[] exefsIVWithOffsetForHeader = AddToByteArray(exefsIV, (int)ctroffset);
var exefsctrmode = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var exefsctrmode = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode.Init(true, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey)), exefsIVWithOffsetForHeader));
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(false, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), exefsIVWithOffsetForHeader));
f.BaseStream.Seek((((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits) + 1) * header.SectorSize) + fileHeader.FileOffset, SeekOrigin.Begin);
@@ -447,7 +444,7 @@ namespace ThreeDS
if (datalenB > 0)
{
g.Write(exefsctrmode2C.ProcessBytes(exefsctrmode.ProcessBytes(f.ReadBytes((int)datalenB))));
g.Write(exefsctrmode2C.DoFinal(exefsctrmode.DoFinal(f.ReadBytes((int)datalenB))));
g.Flush();
}
@@ -463,7 +460,7 @@ namespace ThreeDS
byte[] exefsIVWithOffset = AddToByteArray(exefsIV, ctroffsetE);
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
exefsctrmode2C = CipherUtilities.GetCipher("AES/CTR");
exefsctrmode2C.Init(true, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey2C)), exefsIVWithOffset));
f.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.ExeFSOffsetInMediaUnits + 1) * header.SectorSize, SeekOrigin.Begin);
@@ -479,7 +476,7 @@ namespace ThreeDS
}
if (exefsSizeB > 0)
{
g.Write(exefsctrmode2C.ProcessBytes(f.ReadBytes(exefsSizeB)));
g.Write(exefsctrmode2C.DoFinal(f.ReadBytes(exefsSizeB)));
g.Flush();
}
@@ -510,7 +507,7 @@ namespace ThreeDS
}
}
var romfsctrmode = CipherUtilities.GetCipher("AES/CTR"); // ("AES/CTR/NoPadding")
var romfsctrmode = CipherUtilities.GetCipher("AES/CTR");
romfsctrmode.Init(true, new ParametersWithIV(new KeyParameter(TakeSixteen(NormalKey)), romfsIV));
f.BaseStream.Seek((header.PartitionsTable[p].Offset + partitionHeader.RomFSOffsetInMediaUnits) * header.SectorSize, SeekOrigin.Begin);
@@ -526,7 +523,7 @@ namespace ThreeDS
}
if (romfsSizeB > 0)
{
g.Write(romfsctrmode.ProcessBytes(f.ReadBytes(romfsSizeB)));
g.Write(romfsctrmode.DoFinal(f.ReadBytes(romfsSizeB)));
g.Flush();
}
@@ -571,13 +568,11 @@ namespace ThreeDS
private static string ToBytes(int num)
{
string numstr = "";
int tmp = num;
string numstr = string.Empty;
while (numstr.Length < 16)
{
numstr += (char)(tmp & 0xFF);
tmp >>= 8;
numstr += (char)(num & 0xFF);
num >>= 8;
}
return numstr;