/*public AssuredStreamHeader(Stream source)
* : this(source, VerificationMode.Full)
* {
* }*/
public AssuredStreamHeader(Stream source, VerificationMode mode)
{
QQnBinaryReader br = new QQnBinaryReader(source);
uint vFileSignature = br.ReadUInt32();
if (vFileSignature != FileSignature)
{
throw new FormatException();
}
_fileType = br.ReadString();
_hashType = (HashType)br.ReadByte();
_fileHash = br.ReadByteArray();
_hashSignature = br.ReadByteArray();
byte[] publicKey = br.ReadByteArray();
if (publicKey.Length > 0)
{
_snk = StrongNameKey.LoadFrom(publicKey);
if (mode != VerificationMode.None)
{
if (!_snk.VerifyHash(_fileHash, _hashSignature))
{
throw new CryptographicException("Stream hash verification failed");
}
}
}
_guid = new Guid(br.ReadBytes(16));
_bodyLength = br.ReadInt64();
_hashPosition = source.Position;
}
public void TestMyHash()
{
StrongNameKey snkIn = StrongNameKey.LoadFrom(SnkFile);
byte[] data = new byte[20];
byte[] signature = snkIn.SignHash(data);
byte[] publicKeyData = snkIn.GetPublicKeyData();
StrongNameKey snkVerify = StrongNameKey.LoadFrom(publicKeyData);
Assert.That(snkVerify.VerifyHash(data, signature), Is.True, "Verification completed");
}
/// <summary>
/// Initializes a new instance of the <see cref="AssuredSubStream"/> class.
/// </summary>
/// <param name="parentStream">The parent stream.</param>
/// <param name="verificationMode">The verification mode.</param>
public AssuredSubStream(Stream parentStream, VerificationMode verificationMode)
: base(parentStream, true)
{
AssuredStream signedParent = GetService <AssuredStream>();
if (signedParent != null)
{
_snk = signedParent.AssemblyStrongNameKey;
_hashType = signedParent.HashType;
}
else
{
_hashType = HashType.SHA1;
}
_headerPosition = parentStream.Position;
_streamHash = new byte[QQnCryptoHelpers.GetHashBits(_hashType) / 8];
_hashSignature = new byte[(_snk != null) ? _snk.SignatureLength : 0];
if (parentStream.CanWrite && parentStream.CanSeek && parentStream.Position == parentStream.Length)
{
_updating = true;
WriteHeader();
}
else
{
QQnBinaryReader br = new QQnBinaryReader(BaseStream);
_streamHash = br.ReadBytes(_streamHash.Length);
_hashSignature = br.ReadBytes(_hashSignature.Length);
_hashLength = br.ReadInt64();
_hashPosition = BaseStream.Position;
if (verificationMode != VerificationMode.None)
{
if (_snk != null && !_snk.VerifyHash(_streamHash, _hashSignature))
{
throw new CryptographicException("Stream hash verification failed");
}
}
if (verificationMode == VerificationMode.Full)
{
if (!VerifyHash())
{
throw new CryptographicException("Invalid hash value");
}
}
}
}
