public NcaStream(Stream input, NcaVersion version, NcaBodySection[] sections, NcaKeyStorage keyStorage, byte[] decKeyArea, byte[] decTitleKey)
{
_baseStream = input;
_headerStream = new NcaHeaderStream(input, version, keyStorage.HeaderKey);
_sections = sections.ToList();
_sectionStreams = new Stream[sections.Length];
for (int i = 0; i < sections.Length; i++)
{
// In the writable stream, all cipher streams encapsulate the whole stream instead of sub streaming them
var sectionIv = new byte[0x10];
if (sections[i].SectionCrypto == NcaSectionCrypto.TitleKey || sections[i].SectionCrypto == NcaSectionCrypto.Ctr)
{
// In case of Ctr we just set the base ctr, since with setting the stream position the counter will get updated correctly already
Array.Copy(sections[i].BaseSectionCtr, sectionIv, 0x10);
}
else
{
/* sections encrypted with XTS start with sector id 0 at their respective section offset
* since the cipher stream will still start at offset 0, the sector id gets decremented to a point that it will be 0, reaching its section offset
* this code can be removed if XTS sections don't start at 0 but with a value representing their section offset
*/
sectionIv.Decrement(sections[i].MediaOffset, false);
}
_sectionStreams[i] = new NcaBodyStream(input, sections[i].SectionCrypto, sectionIv, decKeyArea, decTitleKey);
}
}
public NcaHeaderStream(Stream header, NcaVersion version, byte[] headerKey)
{
_baseStream = header;
_advancingBaseStream = new XtsStream(header, headerKey, new byte[0x10], true, false, NcaConstants.MediaSize);
_nonAdvancingBaseStream = new XtsStream(header, headerKey, new byte[0x10], false, false, NcaConstants.MediaSize);
_version = version;
}
/// <summary>
/// Creates a factory for write operations, based on given cipher information
/// </summary>
/// <param name="version">The version of the NCA</param>
/// <param name="masterKeyRevision">The master key revision to be used</param>
/// <param name="keyFile">The file containing all keys for cipher operations</param>
/// <param name="sections">the NCA body section information</param>
public NcaStreamFactory(NcaVersion version, int masterKeyRevision, string keyFile, params NcaBodySection[] sections)
{
if (masterKeyRevision < 0 || masterKeyRevision > 31)
{
throw new InvalidOperationException("Invalid master key revision.");
}
if (sections.Length > 4)
{
throw new InvalidOperationException("Only 4 sections are allowed at most.");
}
if (string.IsNullOrEmpty(keyFile))
{
throw new ArgumentNullException(nameof(keyFile));
}
SetKeyFile(keyFile);
NcaVersion = version;
MasterKeyRevision = masterKeyRevision;
Sections = sections;
}
private static string Print(this NcaHolder ncaHolder)
{
Nca nca = ncaHolder.Nca;
int masterKey = GetMasterKeyRevisionFromKeyGeneration(nca.Header.KeyGeneration);
int colLen = 36;
var sb = new StringBuilder();
sb.AppendLine();
sb.AppendLine("NCA:");
PrintItem(sb, colLen, "Magic:", MagicToString(nca.Header.Magic));
PrintItem(sb, colLen, $"Fixed-Key Signature{nca.VerifyHeaderSignature().GetValidityString()}:", nca.Header.Signature1.ToArray());
PrintItem(sb, colLen, $"NPDM Signature{nca.VerifySignature2().GetValidityString()}:", nca.Header.Signature2.ToArray());
PrintItem(sb, colLen, "Content Size:", $"0x{nca.Header.NcaSize:x12}");
PrintItem(sb, colLen, "TitleID:", $"{nca.Header.TitleId:X16}");
if (nca.CanOpenSection(NcaSectionType.Code))
{
IFileSystem fs = nca.OpenFileSystem(NcaSectionType.Code, IntegrityCheckLevel.None);
Result r = fs.OpenFile(out IFile file, "/main.npdm".ToU8String(), OpenMode.Read);
if (r.IsSuccess())
{
var npdm = new NpdmBinary(file.AsStream(), null);
PrintItem(sb, colLen, "Title Name:", npdm.TitleName);
}
}
PrintItem(sb, colLen, "SDK Version:", nca.Header.SdkVersion);
PrintItem(sb, colLen, "Distribution type:", nca.Header.DistributionType.Print());
PrintItem(sb, colLen, "Content Type:", nca.Header.ContentType.Print());
PrintItem(sb, colLen, "Master Key Revision:", $"{masterKey} ({Utilities.GetKeyRevisionSummary(masterKey)})");
PrintItem(sb, colLen, "Encryption Type:", $"{(nca.Header.HasRightsId ? "Titlekey crypto" : "Standard crypto")}");
if (nca.Header.HasRightsId)
{
PrintItem(sb, colLen, "Rights ID:", nca.Header.RightsId.ToArray());
}
else
{
PrintKeyArea();
}
PrintSections();
return(sb.ToString());
void PrintKeyArea()
{
NcaVersion version = nca.Header.FormatVersion;
if (version == NcaVersion.Nca0RsaOaep)
{
sb.AppendLine("Key Area (Encrypted):");
PrintItem(sb, colLen, "Key (RSA-OAEP Encrypted):", nca.Header.GetKeyArea().ToArray());
sb.AppendLine("Key Area (Decrypted):");
for (int i = 0; i < 2; i++)
{
PrintItem(sb, colLen, $" Key {i} (Decrypted):", nca.GetDecryptedKey(i));
}
}
else if (version == NcaVersion.Nca0FixedKey)
{
sb.AppendLine("Key Area:");
for (int i = 0; i < 2; i++)
{
PrintItem(sb, colLen, $" Key {i}:", nca.Header.GetEncryptedKey(i).ToArray());
}
}
else
{
int keyCount = version == NcaVersion.Nca0 ? 2 : 4;
PrintItem(sb, colLen, "Key Area Encryption Key:", nca.Header.KeyAreaKeyIndex);
sb.AppendLine("Key Area (Encrypted):");
for (int i = 0; i < keyCount; i++)
{
PrintItem(sb, colLen, $" Key {i} (Encrypted):", nca.Header.GetEncryptedKey(i).ToArray());
}
sb.AppendLine("Key Area (Decrypted):");
for (int i = 0; i < keyCount; i++)
{
PrintItem(sb, colLen, $" Key {i} (Decrypted):", nca.GetDecryptedKey(i));
}
}
}
void PrintSections()
{
sb.AppendLine("Sections:");
for (int i = 0; i < 4; i++)
{
if (!nca.Header.IsSectionEnabled(i))
{
continue;
}
NcaFsHeader sectHeader = nca.GetFsHeader(i);
bool isExefs = nca.Header.ContentType == NcaContentType.Program && i == 0;
sb.AppendLine($" Section {i}:");
PrintItem(sb, colLen, " Offset:", $"0x{nca.Header.GetSectionStartOffset(i):x12}");
PrintItem(sb, colLen, " Size:", $"0x{nca.Header.GetSectionSize(i):x12}");
PrintItem(sb, colLen, " Partition Type:", GetPartitionType(sectHeader, isExefs, nca.Header.IsNca0()));
PrintItem(sb, colLen, " Section CTR:", $"{sectHeader.Counter:x16}");
PrintItem(sb, colLen, " Section Validity:", $"{ncaHolder.Validities[i].Print()}");
switch (sectHeader.HashType)
{
case NcaHashType.Sha256:
PrintSha256Hash(sectHeader, i);
break;
case NcaHashType.Ivfc:
Validity masterHashValidity = nca.ValidateSectionMasterHash(i);
PrintIvfcHashNew(sb, colLen, 8, sectHeader.GetIntegrityInfoIvfc(), IntegrityStorageType.RomFs, masterHashValidity);
break;
default:
sb.AppendLine(" Unknown/invalid superblock!");
break;
}
}
}