public EncryptionInfo(DirectoryNode dir)
{
DocumentInputStream dis = dir.CreateDocumentInputStream("EncryptionInfo");
versionMajor = dis.ReadShort();
versionMinor = dis.ReadShort();
encryptionFlags = dis.ReadInt();
if (versionMajor == 4 && versionMinor == 4 && encryptionFlags == 0x40)
{
StringBuilder builder = new StringBuilder();
byte[] xmlDescriptor = new byte[dis.Available()];
dis.Read(xmlDescriptor);
foreach (byte b in xmlDescriptor)
builder.Append((char)b);
string descriptor = builder.ToString();
header = new EncryptionHeader(descriptor);
verifier = new EncryptionVerifier(descriptor);
}
else
{
int hSize = dis.ReadInt();
header = new EncryptionHeader(dis);
if (header.Algorithm == EncryptionHeader.ALGORITHM_RC4)
{
verifier = new EncryptionVerifier(dis, 20);
}
else
{
verifier = new EncryptionVerifier(dis, 32);
}
}
}
public EncryptionHeader(DocumentInputStream dr)
{
flags = dr.ReadInt();
sizeExtra = dr.ReadInt();
algorithm = dr.ReadInt();
hashAlgorithm = dr.ReadInt();
keySize = dr.ReadInt();
providerType = dr.ReadInt();
dr.ReadLong(); //skip reserved.
StringBuilder builder = new StringBuilder();
while (true)
{
char c = (char)dr.ReadShort();
if (c == 0)
{
break;
}
builder.Append(c);
}
cspName = builder.ToString();
cipherMode = MODE_ECB;
keySalt = null;
}
public EncryptionHeader(DocumentInputStream dr)
{
flags = dr.ReadInt();
sizeExtra = dr.ReadInt();
algorithm = dr.ReadInt();
hashAlgorithm = dr.ReadInt();
keySize = dr.ReadInt();
providerType = dr.ReadInt();
dr.ReadLong(); //skip reserved.
StringBuilder builder = new StringBuilder();
while (true)
{
char c = (char)dr.ReadShort();
if (c == 0)
break;
builder.Append(c);
}
cspName = builder.ToString();
cipherMode = MODE_ECB;
keySalt = null;
}
