public CompressedStream(
Stream baseStream,
StreamOperationMode mode,
CompressionSettings settings)
: this(baseStream, mode, settings, true, (EncryptionSettings)null)
{
}
internal OperationStream(Stream baseStream, StreamOperationMode mode)
{
if (!baseStream.CanRead && mode == StreamOperationMode.Read || !baseStream.CanWrite && mode == StreamOperationMode.Write)
{
throw new ArgumentOutOfRangeException(nameof(mode));
}
this.BaseStream = baseStream;
this.streamMode = mode;
this.IsDisposed = false;
}
internal CompressedStream(
Stream baseStream,
StreamOperationMode mode,
ICompressionAlgorithm compressionAlgorithm,
IChecksumAlgorithm checksumAlgorithm)
: base(baseStream, mode)
{
if (compressionAlgorithm == null)
{
throw new ArgumentNullException(nameof(compressionAlgorithm));
}
this.Initialize(baseStream, compressionAlgorithm, checksumAlgorithm);
}
public CompressedStream(
Stream baseStream,
StreamOperationMode mode,
CompressionSettings settings,
bool useCrc32,
EncryptionSettings encryptionSettings)
: base(baseStream, mode)
{
baseStream = encryptionSettings != null ? (Stream) new CryptoStream(baseStream, mode, PlatformSettings.Manager.GetCryptoProvider(encryptionSettings)) : baseStream;
ICompressionAlgorithm compressionAlgorithm = ZipHelper.GetCompressionAlgorithm(settings);
IChecksumAlgorithm checksumAlgorithm = useCrc32 ? (IChecksumAlgorithm) new Crc32() : (IChecksumAlgorithm) new Adler32();
this.Initialize(baseStream, compressionAlgorithm, checksumAlgorithm);
}
public CryptoStream(Stream input, StreamOperationMode mode, ICryptoProvider cryptoProvider)
: base(input, mode)
{
if (!input.CanRead && mode == StreamOperationMode.Read || !input.CanWrite && mode == StreamOperationMode.Write)
{
throw new ArgumentOutOfRangeException(nameof(mode));
}
this.cryptoProvider = cryptoProvider;
switch (this.Mode)
{
case StreamOperationMode.Read:
this.Transform = this.cryptoProvider.CreateDecryptor();
break;
case StreamOperationMode.Write:
this.Transform = this.cryptoProvider.CreateEncryptor();
break;
}
}
