public override void WriteByte(
byte b)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "DigestStream");
digest.Update(b);
}
public ICipher BuildPaddedCipher(Stream stream, IBlockCipherPadding padding)
{
CryptoServicesRegistrar.ApprovedModeCheck(isApprovedModeOnly, parameters.Algorithm.Name);
if (forEncryption)
{
if (stream.CanWrite)
{
return(new CipherImpl(cipher, new PaddingStream(forEncryption, padding, BlockSize, new CipherStream(stream, cipher))));
}
else
{
return(new CipherImpl(cipher, new CipherStream(new PaddingStream(forEncryption, padding, BlockSize, stream), cipher)));
}
}
else
{
if (stream.CanWrite)
{
return(new CipherImpl(cipher, new CipherStream(new PaddingStream(forEncryption, padding, BlockSize, stream), cipher)));
}
else
{
return(new CipherImpl(cipher, new PaddingStream(forEncryption, padding, BlockSize, new CipherStream(stream, cipher))));
}
}
}
internal DigestFactory(TParams parameters, IEngineProvider <IDigest> digestProvider, int digestSize)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.parameters = parameters;
this.digestProvider = digestProvider;
this.digestSize = digestSize;
}
public override void WriteByte(
byte b)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "SignatureStream");
signer.Update(b);
}
internal AeadCipherBuilderImpl(bool forEncryption, TParams parameters, IAeadBlockCipher cipher)
{
this.isApprovedModeOnly = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.forEncryption = forEncryption;
this.parameters = parameters;
this.cipher = cipher;
}
public byte[][] DeriveKeyAndIV(TargetKeyType keyType, int keySizeInBytes, int ivSizeInBytes)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "PasswordBasedDeriver");
if (approvedOnlyMode)
{
if (keySizeInBytes < 14)
{
throw new CryptoUnapprovedOperationError("keySizeInBytes must be at least 14");
}
}
if (keyType == TargetKeyType.MAC)
{
ParametersWithIV paramWithIv = (ParametersWithIV)generator.GenerateDerivedMacParameters(keySizeInBytes * 8, ivSizeInBytes * 8);
return(new byte[][] { ((KeyParameter)paramWithIv.Parameters).GetKey(), paramWithIv.GetIV() });
}
else
{
ParametersWithIV paramWithIv = (ParametersWithIV)generator.GenerateDerivedParameters(keySizeInBytes * 8, ivSizeInBytes * 8);
return(new byte[][] { ((KeyParameter)paramWithIv.Parameters).GetKey(), paramWithIv.GetIV() });
}
}
public int Collect(byte[] destination, int offset)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "DigestResult");
digest.DoFinal(destination, offset);
return(digest.GetDigestSize());
}
public override void WriteByte(
byte b)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "AAD");
aeadCipher.ProcessAadByte(b);
}
/// <summary>
/// Store the final result of the operation by copying it into the destination array.
/// </summary>
/// <returns>The number of bytes copied into destination.</returns>
/// <param name="destination">The byte array to copy the result into.</param>
/// <param name="offset">The offset into destination to start copying the result at.</param>
public int Collect(byte[] destination, int offset)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "SimpleBlockResult");
Array.Copy(result, 0, destination, offset, result.Length);
return(result.Length);
}
/// <summary>
/// Gets the result.
/// </summary>
/// <returns>The result.</returns>
/// <param name="outputLength">The length (in bytes) of the output wanted from the XOF.</param>
public IBlockResult GetResult(int outputLength)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "XofResult");
byte[] rv = new byte[outputLength];
xof.DoOutput(rv, 0, outputLength);
return(new SimpleBlockResult(rv));
}
public override void Write(
byte[] buffer,
int offset,
int count)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "DigestStream");
if (count > 0)
{
digest.BlockUpdate(buffer, offset, count);
}
}
public override void Write(
byte[] buffer,
int offset,
int count)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "AAD");
if (count > 0)
{
aeadCipher.ProcessAadBytes(buffer, offset, count);
}
}
public byte[] DeriveKey(TargetKeyType keyType, int keySizeInBytes)
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "PasswordBasedDeriver");
if (approvedOnlyMode)
{
if (keySizeInBytes < 14)
{
throw new CryptoUnapprovedOperationError("keySizeInBytes must be at least 14");
}
}
if (keyType == TargetKeyType.MAC)
{
return(((KeyParameter)generator.GenerateDerivedMacParameters(keySizeInBytes * 8)).GetKey());
}
return(((KeyParameter)generator.GenerateDerivedParameters(keySizeInBytes * 8)).GetKey());
}
internal CipherBuilderImpl(TParams parameters, IBufferedCipher cipher)
{
this.isApprovedModeOnly = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.parameters = parameters;
this.cipher = cipher;
}
public AADBucket(
IAeadBlockCipher aeadCipher)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.aeadCipher = aeadCipher;
}
public static A CreateGenerator <A>(IGenerationServiceType <A> type)
{
return(ThreadSecurityContext.CreateGenerator(type, CryptoServicesRegistrar.GetSecureRandom()));
}
internal XofCalculator(IXof xof)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.xof = xof;
this.stream = new DigestBucket(xof);
}
/// <summary>
/// Return the final result of the operation.
/// </summary>
/// <returns>A block of bytes, representing the result of an operation.</returns>
public byte[] Collect()
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "SimpleBlockResult");
return(result);
}
public ICipher BuildCipher(Stream stream)
{
CryptoServicesRegistrar.ApprovedModeCheck(isApprovedModeOnly, parameters.Algorithm.Name);
return(new CipherImpl(cipher, new CipherStream(stream, cipher)));
}
public SignatureBucket(
ISigner signer)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.signer = signer;
}
internal DigestCalculator(IDigest digest)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.digest = digest;
this.stream = new DigestBucket(digest);
}
public ICipher BuildCipher(Stream stream)
{
CryptoServicesRegistrar.ApprovedModeCheck(isApprovedModeOnly, parameters.Algorithm.Name);
return(new AeadCipherImpl(parameters.MacSizeInBits, cipher, new CipherStream(stream, new BufferedAeadBlockCipher(cipher))));
}
public DigestBucket(
IDigest digest)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.digest = digest;
}
internal DigestResult(IDigest digest)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.digest = digest;
}
/// <summary>
/// Create a stream calculator for the digest algorithm associated with this factory. The stream
/// calculator is used for the actual operation of entering the data to be digested
/// and producing the digest block.
/// </summary>
/// <returns>A calculator producing an IBlockResult with the final digest in it.</returns>
public IStreamCalculator <IBlockResult> CreateCalculator()
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "DigestFactory");
return(new DigestCalculator(digestProvider.CreateEngine(EngineUsage.GENERAL)));
}
internal XofFactory(TParams parameters, IEngineProvider <IXof> xofProvider)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.parameters = parameters;
this.xofProvider = xofProvider;
}
public IBlockResult GetResult()
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "DigestStream");
return(new DigestResult(digest));
}
public PasswordBasedDeriver(A algorithmDetails, PbeParametersGenerator generator)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.algorithmDetails = algorithmDetails;
this.generator = generator;
}
/// <summary>
/// Create a stream calculator for the XOF associated with this factory. The stream
/// calculator is used for the actual operation of entering the data to be processed
/// and producing the XOF output.
/// </summary>
/// <returns>A calculator producing an StreamResult which can be used to read the output from the XOF.</returns>
public IVariableStreamCalculator <IBlockResult> CreateCalculator()
{
CryptoServicesRegistrar.ApprovedModeCheck(approvedOnlyMode, "XofFactory");
return(new XofCalculator(xofProvider.CreateEngine(EngineUsage.GENERAL)));
}
/// <summary>
/// Base constructor - a wrapper for the passed in byte array.
/// </summary>
/// <param name="result">The byte array to be wrapped.</param>
public SimpleBlockResult(byte[] result)
{
this.approvedOnlyMode = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.result = result;
}
