diff --git a/SabreTools.IO.sln b/SabreTools.IO.sln index e41ecc7..6a06b7c 100644 --- a/SabreTools.IO.sln +++ b/SabreTools.IO.sln @@ -59,6 +59,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SabreTools.Collections.Exte EndProject Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SabreTools.Collections.Extensions.Test", "SabreTools.Collections.Extensions.Test\SabreTools.Collections.Extensions.Test.csproj", "{C32AA0AE-46ED-49CE-9E4F-84B45130D2CE}" EndProject +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SabreTools.Security.Cryptography.Test", "SabreTools.Security.Cryptography.Test\SabreTools.Security.Cryptography.Test.csproj", "{C9634E58-302A-433E-AC74-883C591EFB94}" +EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU @@ -405,6 +407,18 @@ Global {C32AA0AE-46ED-49CE-9E4F-84B45130D2CE}.Release|x64.Build.0 = Release|Any CPU {C32AA0AE-46ED-49CE-9E4F-84B45130D2CE}.Release|x86.ActiveCfg = Release|Any CPU {C32AA0AE-46ED-49CE-9E4F-84B45130D2CE}.Release|x86.Build.0 = Release|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Debug|Any CPU.Build.0 = Debug|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Debug|x64.ActiveCfg = Debug|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Debug|x64.Build.0 = Debug|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Debug|x86.ActiveCfg = Debug|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Debug|x86.Build.0 = Debug|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Release|Any CPU.ActiveCfg = Release|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Release|Any CPU.Build.0 = Release|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Release|x64.ActiveCfg = Release|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Release|x64.Build.0 = Release|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Release|x86.ActiveCfg = Release|Any CPU + {C9634E58-302A-433E-AC74-883C591EFB94}.Release|x86.Build.0 = Release|Any CPU EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE diff --git a/SabreTools.Security.Cryptography.Test/SabreTools.Security.Cryptography.Test.csproj b/SabreTools.Security.Cryptography.Test/SabreTools.Security.Cryptography.Test.csproj new file mode 100644 index 0000000..6835531 --- /dev/null +++ b/SabreTools.Security.Cryptography.Test/SabreTools.Security.Cryptography.Test.csproj @@ -0,0 +1,23 @@ + + + + net8.0;net9.0;net10.0 + false + latest + enable + true + CS0618 + + + + + + + + + + + + + + \ No newline at end of file diff --git a/SabreTools.Security.Cryptography.Test/WiiDecrypterTests.cs b/SabreTools.Security.Cryptography.Test/WiiDecrypterTests.cs new file mode 100644 index 0000000..4dd9670 --- /dev/null +++ b/SabreTools.Security.Cryptography.Test/WiiDecrypterTests.cs @@ -0,0 +1,111 @@ +using System; +using Xunit; + +namespace SabreTools.Security.Cryptography.Test +{ + public class WiiDecrypterTests + { + #region DecryptTitleKey + + [Fact] + public void DecryptTitleKey_EmptyKeys_Null() + { + var decrypter = new WiiDecrypter + { + RetailCommonKey = [], + KoreanCommonKey = [], + }; + + Assert.Null(decrypter.DecryptTitleKey(new byte[16], new byte[8], 0)); + } + + [Fact] + public void DecryptTitleKey_NullEncKey_Null() + { + var decrypter = new WiiDecrypter + { + RetailCommonKey = new byte[16], + KoreanCommonKey = new byte[16], + }; + + Assert.Null(decrypter.DecryptTitleKey(null, new byte[8], 0)); + } + + [Fact] + public void DecryptTitleKey_WrongLengthEncKey_Null() + { + var decrypter = new WiiDecrypter + { + RetailCommonKey = new byte[16], + KoreanCommonKey = new byte[16], + }; + + Assert.Null(decrypter.DecryptTitleKey(new byte[8], new byte[8], 0)); + } + + [Fact] + public void DecryptTitleKey_NullTitleId_Null() + { + var decrypter = new WiiDecrypter + { + RetailCommonKey = new byte[16], + KoreanCommonKey = new byte[16], + }; + + Assert.Null(decrypter.DecryptTitleKey(new byte[16], null, 0)); + } + + [Fact] + public void DecryptTitleKey_WrongLengthTitleId_Null() + { + var decrypter = new WiiDecrypter + { + RetailCommonKey = new byte[16], + KoreanCommonKey = new byte[16], + }; + + Assert.Null(decrypter.DecryptTitleKey(new byte[16], new byte[4], 0)); + } + + [Theory] + [InlineData(-1)] + [InlineData(2)] + public void DecryptTitleKey_UnknownIndex_Null(int index) + { + var decrypter = new WiiDecrypter + { + RetailCommonKey = new byte[16], + KoreanCommonKey = new byte[16], + }; + + Assert.Null(decrypter.DecryptTitleKey(new byte[16], new byte[8], index)); + } + + [Fact] + public void DecryptTitleKey_WithInjectedKey_RoundTrips() + { + byte[] commonKey = + [ + 0xDE, 0xAD, 0xBE, 0xEF, 0xCA, 0xFE, 0xF0, 0x0D, + 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, + ]; + byte[] plainTitleKey = + [ + 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, + 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10, + ]; + byte[] titleId = [0x00, 0x01, 0x00, 0x45, 0x52, 0x53, 0x42, 0x00]; + + byte[] iv = new byte[16]; + Array.Copy(titleId, 0, iv, 0, 8); + byte[] encTitleKey = AESCBC.Encrypt(plainTitleKey, commonKey, iv) + ?? throw new InvalidOperationException("AesCbc.Encrypt returned null"); + + byte[]? decrypted = WiiDecrypter.DecryptTitleKey(encTitleKey, titleId, commonKey); + Assert.NotNull(decrypted); + Assert.Equal(plainTitleKey, decrypted); + } + + #endregion + } +} diff --git a/SabreTools.Security.Cryptography/N3DSEncryptionSettings.cs b/SabreTools.Security.Cryptography/N3DSEncryptionSettings.cs index d038d86..f2d711b 100644 --- a/SabreTools.Security.Cryptography/N3DSEncryptionSettings.cs +++ b/SabreTools.Security.Cryptography/N3DSEncryptionSettings.cs @@ -130,8 +130,8 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] TestIV = [ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, - 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, - ]; + 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + ]; /// /// Pattern to use for key validation tests @@ -139,14 +139,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] TestPattern = [ 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, - 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, - 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, - 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, - 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, - 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, - 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, - 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, - ]; + 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, + 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, + 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, + 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, + 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, + 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, + 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, + ]; /// /// Expected output value for KeyX0x18 @@ -154,14 +154,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedKeyX0x18 = [ 0x06, 0xF1, 0xB2, 0x3B, 0x12, 0xAD, 0x80, 0xC1, - 0x13, 0xC6, 0x18, 0x3D, 0x27, 0xB8, 0xB9, 0x95, - 0x49, 0x73, 0x59, 0x82, 0xEF, 0xFE, 0x16, 0x48, - 0x91, 0x2A, 0x89, 0x55, 0x9A, 0xDC, 0x3C, 0xA0, - 0x84, 0x46, 0x14, 0xE0, 0x16, 0x59, 0x8E, 0x4F, - 0xC2, 0x6C, 0x52, 0xA4, 0x7D, 0xAD, 0x4F, 0x23, - 0xF1, 0xC6, 0x99, 0x44, 0x39, 0xB7, 0x42, 0xF0, - 0x1F, 0xBB, 0x02, 0xF6, 0x0A, 0x8A, 0xC2, 0x9A, - ]; + 0x13, 0xC6, 0x18, 0x3D, 0x27, 0xB8, 0xB9, 0x95, + 0x49, 0x73, 0x59, 0x82, 0xEF, 0xFE, 0x16, 0x48, + 0x91, 0x2A, 0x89, 0x55, 0x9A, 0xDC, 0x3C, 0xA0, + 0x84, 0x46, 0x14, 0xE0, 0x16, 0x59, 0x8E, 0x4F, + 0xC2, 0x6C, 0x52, 0xA4, 0x7D, 0xAD, 0x4F, 0x23, + 0xF1, 0xC6, 0x99, 0x44, 0x39, 0xB7, 0x42, 0xF0, + 0x1F, 0xBB, 0x02, 0xF6, 0x0A, 0x8A, 0xC2, 0x9A, + ]; /// /// Expected output value for DevKeyX0x18 @@ -169,14 +169,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedDevKeyX0x18 = [ 0x99, 0x6E, 0x3C, 0x54, 0x97, 0x3C, 0xEA, 0xE8, - 0xBA, 0xAE, 0x18, 0x5C, 0x93, 0x27, 0x65, 0x50, - 0xF6, 0x6D, 0x67, 0xD7, 0xEF, 0xBD, 0x7C, 0xCB, - 0x8A, 0xC1, 0x1A, 0x54, 0xFC, 0x3B, 0x8B, 0x3A, - 0x0E, 0xE5, 0xEF, 0x27, 0x4A, 0x73, 0x7E, 0x0A, - 0x2E, 0x2E, 0x9D, 0xAF, 0x6C, 0x03, 0xF2, 0x91, - 0xC4, 0xFA, 0x73, 0xFD, 0x6B, 0xA0, 0x07, 0xD4, - 0x75, 0x5B, 0x6F, 0x2E, 0x8B, 0x68, 0x4C, 0xD1, - ]; + 0xBA, 0xAE, 0x18, 0x5C, 0x93, 0x27, 0x65, 0x50, + 0xF6, 0x6D, 0x67, 0xD7, 0xEF, 0xBD, 0x7C, 0xCB, + 0x8A, 0xC1, 0x1A, 0x54, 0xFC, 0x3B, 0x8B, 0x3A, + 0x0E, 0xE5, 0xEF, 0x27, 0x4A, 0x73, 0x7E, 0x0A, + 0x2E, 0x2E, 0x9D, 0xAF, 0x6C, 0x03, 0xF2, 0x91, + 0xC4, 0xFA, 0x73, 0xFD, 0x6B, 0xA0, 0x07, 0xD4, + 0x75, 0x5B, 0x6F, 0x2E, 0x8B, 0x68, 0x4C, 0xD1, + ]; /// /// Expected output value for KeyX0x1B @@ -184,29 +184,29 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedKeyX0x1B = [ 0x0A, 0xE4, 0x79, 0x02, 0x1B, 0xFA, 0x25, 0x4B, - 0x2D, 0x92, 0x4F, 0xA8, 0x41, 0x59, 0xCE, 0x10, - 0x09, 0xE6, 0x08, 0x61, 0x23, 0xC7, 0xD2, 0x30, - 0x84, 0x37, 0xD5, 0x49, 0x42, 0x94, 0xB2, 0x70, - 0x6A, 0xF3, 0x75, 0xB0, 0x1F, 0x4F, 0xA1, 0xCE, - 0x03, 0xA2, 0x6A, 0x19, 0x5D, 0x32, 0x0D, 0xB5, - 0x79, 0xCD, 0xFD, 0xF0, 0xDE, 0x49, 0x26, 0x2D, - 0x29, 0x36, 0x30, 0x69, 0x8B, 0x45, 0xE1, 0xFC, - ]; + 0x2D, 0x92, 0x4F, 0xA8, 0x41, 0x59, 0xCE, 0x10, + 0x09, 0xE6, 0x08, 0x61, 0x23, 0xC7, 0xD2, 0x30, + 0x84, 0x37, 0xD5, 0x49, 0x42, 0x94, 0xB2, 0x70, + 0x6A, 0xF3, 0x75, 0xB0, 0x1F, 0x4F, 0xA1, 0xCE, + 0x03, 0xA2, 0x6A, 0x19, 0x5D, 0x32, 0x0D, 0xB5, + 0x79, 0xCD, 0xFD, 0xF0, 0xDE, 0x49, 0x26, 0x2D, + 0x29, 0x36, 0x30, 0x69, 0x8B, 0x45, 0xE1, 0xFC, + ]; /// /// Expected output value for DevKeyX0x1B /// private static readonly byte[] ExpectedDevKeyX0x1B = [ - 0x16, 0x4F, 0xD9, 0x58, 0xC9, 0x20, 0xB3, 0xED, - 0xC4, 0xEB, 0x57, 0x39, 0x10, 0xEF, 0xA8, 0xCC, - 0xE5, 0x49, 0xBF, 0x52, 0x10, 0xA9, 0xCC, 0xE1, - 0x65, 0x3B, 0x2D, 0x51, 0x45, 0xFB, 0x60, 0x52, - 0x3E, 0x29, 0xEB, 0xEB, 0x3F, 0xF2, 0x76, 0x08, - 0x00, 0x05, 0x7F, 0x64, 0x29, 0x4A, 0x17, 0x22, - 0x56, 0x7F, 0x49, 0x94, 0x1A, 0x8C, 0x56, 0x35, - 0x38, 0xBE, 0xA4, 0x2E, 0x58, 0xD3, 0x81, 0x8C, - ]; + 0x16, 0x4F, 0xD9, 0x58, 0xC9, 0x20, 0xB3, 0xED, + 0xC4, 0xEB, 0x57, 0x39, 0x10, 0xEF, 0xA8, 0xCC, + 0xE5, 0x49, 0xBF, 0x52, 0x10, 0xA9, 0xCC, 0xE1, + 0x65, 0x3B, 0x2D, 0x51, 0x45, 0xFB, 0x60, 0x52, + 0x3E, 0x29, 0xEB, 0xEB, 0x3F, 0xF2, 0x76, 0x08, + 0x00, 0x05, 0x7F, 0x64, 0x29, 0x4A, 0x17, 0x22, + 0x56, 0x7F, 0x49, 0x94, 0x1A, 0x8C, 0x56, 0x35, + 0x38, 0xBE, 0xA4, 0x2E, 0x58, 0xD3, 0x81, 0x8C, + ]; /// /// Expected output value for KeyX0x25 @@ -214,14 +214,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedKeyX0x25 = [ 0x37, 0xBC, 0x73, 0xD6, 0xEE, 0x73, 0xE0, 0x94, - 0x42, 0x84, 0x74, 0xE5, 0xD8, 0xFB, 0x5F, 0x65, - 0xF4, 0xCF, 0x2E, 0xC1, 0x43, 0x48, 0x6C, 0xAA, - 0xC8, 0xF9, 0x96, 0xE6, 0x33, 0xDD, 0xE7, 0xBF, - 0xD2, 0x21, 0x89, 0x39, 0x13, 0xD1, 0xEC, 0xCA, - 0x1D, 0x5D, 0x1F, 0x77, 0x95, 0xD2, 0x8B, 0x27, - 0x92, 0x79, 0xC5, 0x1D, 0x72, 0xA7, 0x28, 0x57, - 0x41, 0x0E, 0x46, 0xB8, 0x80, 0x7B, 0x7C, 0x0D, - ]; + 0x42, 0x84, 0x74, 0xE5, 0xD8, 0xFB, 0x5F, 0x65, + 0xF4, 0xCF, 0x2E, 0xC1, 0x43, 0x48, 0x6C, 0xAA, + 0xC8, 0xF9, 0x96, 0xE6, 0x33, 0xDD, 0xE7, 0xBF, + 0xD2, 0x21, 0x89, 0x39, 0x13, 0xD1, 0xEC, 0xCA, + 0x1D, 0x5D, 0x1F, 0x77, 0x95, 0xD2, 0x8B, 0x27, + 0x92, 0x79, 0xC5, 0x1D, 0x72, 0xA7, 0x28, 0x57, + 0x41, 0x0E, 0x46, 0xB8, 0x80, 0x7B, 0x7C, 0x0D, + ]; /// /// Expected output value for DevKeyX0x25 @@ -229,14 +229,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedDevKeyX0x25 = [ 0x71, 0x65, 0x30, 0xF2, 0x68, 0xEC, 0x65, 0x0A, - 0x8C, 0x9E, 0xC5, 0x5A, 0xFA, 0x37, 0x8E, 0xDA, - 0x7B, 0x58, 0x3B, 0x66, 0x7C, 0x9D, 0x16, 0xD9, - 0x2D, 0x8F, 0xCF, 0x04, 0x66, 0x7F, 0x27, 0x41, - 0xBF, 0x5F, 0x1E, 0x11, 0x4C, 0xD6, 0xB9, 0x0A, - 0xC5, 0x42, 0xCF, 0x2B, 0x87, 0x6B, 0xD4, 0x72, - 0x4D, 0x9C, 0x29, 0x2E, 0xF8, 0xB0, 0x6F, 0x22, - 0x35, 0x5B, 0x96, 0x83, 0xD1, 0xE4, 0x5E, 0xDB, - ]; + 0x8C, 0x9E, 0xC5, 0x5A, 0xFA, 0x37, 0x8E, 0xDA, + 0x7B, 0x58, 0x3B, 0x66, 0x7C, 0x9D, 0x16, 0xD9, + 0x2D, 0x8F, 0xCF, 0x04, 0x66, 0x7F, 0x27, 0x41, + 0xBF, 0x5F, 0x1E, 0x11, 0x4C, 0xD6, 0xB9, 0x0A, + 0xC5, 0x42, 0xCF, 0x2B, 0x87, 0x6B, 0xD4, 0x72, + 0x4D, 0x9C, 0x29, 0x2E, 0xF8, 0xB0, 0x6F, 0x22, + 0x35, 0x5B, 0x96, 0x83, 0xD1, 0xE4, 0x5E, 0xDB, + ]; /// /// Expected output value for KeyX0x2C @@ -244,14 +244,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedKeyX0x2C = [ 0xAE, 0x44, 0x20, 0xDB, 0xA5, 0x96, 0xDC, 0xF3, - 0xD8, 0x23, 0x9E, 0x3C, 0x44, 0x73, 0x3D, 0xCD, - 0x07, 0xD5, 0xF8, 0xD0, 0xC6, 0xB3, 0x5A, 0x80, - 0xB5, 0x5A, 0x55, 0x30, 0x5D, 0x4A, 0xBE, 0x61, - 0xBF, 0xEF, 0x64, 0x17, 0x28, 0xD6, 0x26, 0x52, - 0x42, 0x4D, 0x8F, 0x1C, 0xBC, 0x63, 0xD3, 0x91, - 0x7D, 0xA6, 0x4F, 0xAF, 0x26, 0x38, 0x60, 0xEE, - 0x79, 0x92, 0x2F, 0xD8, 0xCA, 0x4E, 0xE7, 0xEC, - ]; + 0xD8, 0x23, 0x9E, 0x3C, 0x44, 0x73, 0x3D, 0xCD, + 0x07, 0xD5, 0xF8, 0xD0, 0xC6, 0xB3, 0x5A, 0x80, + 0xB5, 0x5A, 0x55, 0x30, 0x5D, 0x4A, 0xBE, 0x61, + 0xBF, 0xEF, 0x64, 0x17, 0x28, 0xD6, 0x26, 0x52, + 0x42, 0x4D, 0x8F, 0x1C, 0xBC, 0x63, 0xD3, 0x91, + 0x7D, 0xA6, 0x4F, 0xAF, 0x26, 0x38, 0x60, 0xEE, + 0x79, 0x92, 0x2F, 0xD8, 0xCA, 0x4E, 0xE7, 0xEC, + ]; /// /// Expected output value for DevKeyX0x2C @@ -259,14 +259,14 @@ namespace SabreTools.Security.Cryptography private static readonly byte[] ExpectedDevKeyX0x2C = [ 0x5F, 0x73, 0xD5, 0x9A, 0x67, 0xFF, 0x8C, 0x12, - 0x31, 0x58, 0x0B, 0x58, 0x46, 0xFE, 0x05, 0x16, - 0x92, 0xE4, 0x84, 0x06, 0x18, 0x9B, 0x58, 0x91, - 0xE7, 0xF8, 0xCD, 0xA9, 0x95, 0xAC, 0x07, 0xCD, - 0x43, 0x20, 0x7A, 0x8C, 0xCC, 0xAB, 0x48, 0x50, - 0x29, 0x2F, 0x96, 0x73, 0xB0, 0xD9, 0xE5, 0xCB, - 0xE6, 0x9A, 0x0D, 0xF7, 0xD0, 0x1E, 0xC2, 0xEC, - 0xC1, 0xE2, 0x8E, 0xEE, 0x89, 0xB9, 0xB1, 0x97, - ]; + 0x31, 0x58, 0x0B, 0x58, 0x46, 0xFE, 0x05, 0x16, + 0x92, 0xE4, 0x84, 0x06, 0x18, 0x9B, 0x58, 0x91, + 0xE7, 0xF8, 0xCD, 0xA9, 0x95, 0xAC, 0x07, 0xCD, + 0x43, 0x20, 0x7A, 0x8C, 0xCC, 0xAB, 0x48, 0x50, + 0x29, 0x2F, 0x96, 0x73, 0xB0, 0xD9, 0xE5, 0xCB, + 0xE6, 0x9A, 0x0D, 0xF7, 0xD0, 0x1E, 0xC2, 0xEC, + 0xC1, 0xE2, 0x8E, 0xEE, 0x89, 0xB9, 0xB1, 0x97, + ]; #endregion diff --git a/SabreTools.Security.Cryptography/WiiDecrypter.cs b/SabreTools.Security.Cryptography/WiiDecrypter.cs new file mode 100644 index 0000000..6d41a53 --- /dev/null +++ b/SabreTools.Security.Cryptography/WiiDecrypter.cs @@ -0,0 +1,156 @@ +using System; +using SabreTools.Hashing; + +namespace SabreTools.Security.Cryptography +{ + public class WiiDecrypter + { + /// + /// Retail common key (index 0) + /// + public byte[] RetailCommonKey + { + get; + set + { + if (ValidateRetailCommonKey(value)) + field = value; + } + } = []; + + /// + /// Korean common key (index 1) + /// + public byte[] KoreanCommonKey + { + get; + set + { + if (ValidateKoreanCommonKey(value)) + field = value; + } + } = []; + + #region Internal Test Values + + /// + /// Korean common key SHA-256 hash + /// + private const string KoreanCommonKeySHA256 = "b9f42ca27a1e178f0f14ebf1a05d486fa8db8d08875336c4e6e8dfae29f2901c"; + + /// + /// Retail common key SHA-256 hash + /// + private const string RetailCommonKeySHA256 = "de38aeab4fe0c36d828a47e6fd315100e7ce234d3b00aa25e6ad6f5ff2824af8"; + + #endregion + + #region Decryption + + /// + /// Decrypt a Wii partition title key from the ticket data. + /// + /// 16-byte encrypted title key from ticket offset 0x1BF + /// 8-byte title ID from ticket offset 0x1DC (big-endian) + /// Common key index to use for decryption + /// Decrypted 16-byte title key, or null if no key is available for the given index + public byte[]? DecryptTitleKey(byte[]? encryptedTitleKey, byte[]? titleId, int commonKeyIndex) + { + if (encryptedTitleKey is null || encryptedTitleKey.Length != 16) + return null; + if (titleId is null || titleId.Length != 8) + return null; + + byte[] commonKey; + if (commonKeyIndex == 0) + commonKey = RetailCommonKey; + else if (commonKeyIndex == 1) + commonKey = KoreanCommonKey; + else + return null; + + return DecryptTitleKey(encryptedTitleKey, titleId, commonKey); + } + + /// + /// Decrypt a Wii partition title key from the ticket data. + /// + /// 16-byte encrypted title key from ticket offset 0x1BF + /// 8-byte title ID from ticket offset 0x1DC (big-endian) + /// Common key to use for decryption + /// Decrypted 16-byte title key, or null if no key is available for the given index + public static byte[]? DecryptTitleKey(byte[]? encryptedTitleKey, byte[]? titleId, byte[] commonKey) + { + if (encryptedTitleKey is null || encryptedTitleKey.Length != 16) + return null; + if (titleId is null || titleId.Length != 8) + return null; + + if (commonKey.Length != 16) + return null; + + // IV is the 8-byte title ID padded with zeros to 16 bytes + byte[] iv = new byte[16]; + Array.Copy(titleId, 0, iv, 0, 8); + + return AESCBC.Decrypt(encryptedTitleKey, commonKey, iv); + } + + /// + /// Decrypt one Wii block of data (0x7C00 bytes) using AES-128-CBC. + /// + /// 0x7C00 bytes of encrypted block data + /// 16-byte partition title key + /// 16-byte initialization vector (last 16 bytes of the preceding hash block) + /// Decrypted 0x7C00-byte block data, or null on error + public static byte[]? DecryptBlock(byte[] encryptedData, byte[] titleKey, byte[] iv) + { + if (encryptedData is null || encryptedData.Length != 0x7C00) + return null; + if (titleKey is null || titleKey.Length != 16) + return null; + if (iv is null || iv.Length != 16) + return null; + + return AESCBC.Decrypt(encryptedData, titleKey, iv); + } + + #endregion + + #region Validation Methods + + /// + /// Validate the Korean common key based on hash and length + /// + /// Korean common key to validate + /// True if the key was valid, false otherwise + public static bool ValidateKoreanCommonKey(byte[]? commonKey) + { + // Ignore invalid values + if (commonKey is null || commonKey.Length != 16) + return false; + + // Hash the key and compare + string? actualHash = HashTool.GetByteArrayHash(commonKey, HashType.SHA256); + return string.Equals(actualHash, KoreanCommonKeySHA256, StringComparison.OrdinalIgnoreCase); + } + + /// + /// Validate the retail common key based on hash and length + /// + /// Retail common key to validate + /// True if the key was valid, false otherwise + public static bool ValidateRetailCommonKey(byte[]? commonKey) + { + // Ignore invalid values + if (commonKey is null || commonKey.Length != 16) + return false; + + // Hash the key and compare + string? actualHash = HashTool.GetByteArrayHash(commonKey, HashType.SHA256); + return string.Equals(actualHash, RetailCommonKeySHA256, StringComparison.OrdinalIgnoreCase); + } + + #endregion + } +}