static void GetAesParameters(BlamVersion game, CacheSectionType type, out byte[] key, out byte[] iv)
{
switch (game)
{
case BlamVersion.HaloReach_Beta:
key = kAesBeta.Key;
iv = kAesBeta.Iv;
break;
case BlamVersion.HaloReach_Xbox:
if (type == CacheSectionType.Localization)
{
key = kAesRetail[0].Key;
iv = kAesRetail[0].Iv;
}
else if (type == CacheSectionType.Debug)
{
key = kAesRetail[1].Key;
iv = kAesRetail[1].Iv;
}
else if (type == CacheSectionType.Tag)
{
key = kAesRetail[2].Key;
iv = kAesRetail[2].Iv;
}
else
{
goto default;
}
break;
default: throw new Debug.Exceptions.UnreachableException(string.Format("{0}/{1}", game.ToString(), type.ToString()));
}
}
public SectionInterop this[CacheSectionType type] {
get {
int index = (int)type;
return(sections[index]);
}
}
internal virtual byte[] DecryptCacheSegmentBytes(CacheSectionType section_type, int segment_offset, int segment_size)
{
InputStream.Seek(segment_offset);
uint buffer_size = Util.Align(16, (uint)segment_size);
byte[] bytes = InputStream.ReadBytes(buffer_size);
return(bytes);
}
internal override byte[] DecryptCacheSegmentBytes(CacheSectionType section_type, int segment_offset, int segment_size)
{
InputStream.Seek(segment_offset);
uint buffer_size = Util.Align(16, (uint)segment_size);
byte[] encrypted = InputStream.ReadBytes(buffer_size);
byte[] decrypted;
GameDefinition.SecurityAesDecrypt(engineVersion, section_type, encrypted, out decrypted);
return(decrypted != null ? decrypted : null);
}
internal IO.EndianReader DecryptCacheSegmentStream(CacheSectionType section_type, int segment_offset, int segment_size)
{
byte[] bytes = DecryptCacheSegmentBytes(section_type, segment_offset, segment_size);
return(bytes != null ? new IO.EndianReader(bytes) : null);
}
internal IO.EndianReader DecryptCacheSegment(CacheSectionType section_type, int segment_offset, int segment_size)
{
InputStream.Seek(segment_offset);
uint buffer_size = Util.Align(16, (uint)segment_size);
byte[] encrypted = InputStream.ReadBytes(buffer_size);
byte[] decrypted;
GameDefinition.SecurityAesDecrypt(engineVersion, section_type, encrypted, out decrypted);
return decrypted != null ? new IO.EndianReader(decrypted) : null;
}
internal static void SecurityAesDecrypt(BlamVersion game, CacheSectionType section_type, byte[] input, out byte[] output)
{
SecurityAesDecrypt(game, section_type, input, out output, GetAesParameters);
}
public SectionInterop this[CacheSectionType type] { get {
int index = (int)type;
return sections[index];
} }
internal static void SecurityAesDecrypt(BlamVersion game, CacheSectionType section_type, byte[] input, out byte[] output)
{
SecurityAesDecrypt(game, section_type, input, out output, GetAesParameters);
}
static void GetAesParameters(BlamVersion game, CacheSectionType type, out byte[] key, out byte[] iv)
{
switch (game)
{
case BlamVersion.Halo4_Xbox:
if (type == CacheSectionType.Localization)
{
key = kAesRetail[0].Key;
iv = kAesRetail[0].Iv;
}
else if (type == CacheSectionType.Debug)
{
key = kAesRetail[1].Key;
iv = kAesRetail[1].Iv;
}
else if (type == CacheSectionType.Tag)
{
key = kAesRetail[2].Key;
iv = kAesRetail[2].Iv;
}
else goto default;
break;
default: throw new Debug.Exceptions.UnreachableException(string.Format("{0}/{1}", game.ToString(), type.ToString()));
}
}