/**
* Constructs an EncryptionInfo from scratch
*
* @param encryptionMode see {@link EncryptionMode} for values, {@link EncryptionMode#cryptoAPI} is for
* internal use only, as it's record based
* @param cipherAlgorithm
* @param hashAlgorithm
* @param keyBits
* @param blockSize
* @param chainingMode
*
* @throws EncryptedDocumentException if the given parameters mismatch, e.g. only certain combinations
* of keyBits, blockSize are allowed for a given {@link CipherAlgorithm}
*/
public EncryptionInfo(
EncryptionMode encryptionMode
, CipherAlgorithm cipherAlgorithm
, HashAlgorithm hashAlgorithm
, int keyBits
, int blockSize
, ChainingMode chainingMode
)
{
_versionMajor = encryptionMode.VersionMajor;
_versionMinor = encryptionMode.VersionMinor;
_encryptionFlags = encryptionMode.EncryptionFlags;
IEncryptionInfoBuilder eib;
try
{
eib = GetBuilder(encryptionMode);
}
catch (Exception e)
{
throw new EncryptedDocumentException(e);
}
eib.Initialize(this, cipherAlgorithm, hashAlgorithm, keyBits, blockSize, chainingMode);
_header = eib.GetHeader();
_verifier = eib.GetVerifier();
_decryptor = eib.GetDecryptor();
_encryptor = eib.GetEncryptor();
}
/**
* @deprecated use {@link #EncryptionInfo(EncryptionMode, CipherAlgorithm, HashAlgorithm, int, int, ChainingMode)}
*/
public EncryptionInfo(
DirectoryNode dir
, EncryptionMode encryptionMode
, CipherAlgorithm cipherAlgorithm
, HashAlgorithm hashAlgorithm
, int keyBits
, int blockSize
, ChainingMode chainingMode
)
: this(encryptionMode, cipherAlgorithm, hashAlgorithm, keyBits, blockSize, chainingMode)
{
;
}
/**
* @deprecated use {@link #EncryptionInfo(EncryptionMode, CipherAlgorithm, HashAlgorithm, int, int, ChainingMode)}
*/
public EncryptionInfo(
NPOIFSFileSystem fs
, EncryptionMode encryptionMode
, CipherAlgorithm cipherAlgorithm
, HashAlgorithm hashAlgorithm
, int keyBits
, int blockSize
, ChainingMode chainingMode
)
: this(encryptionMode, cipherAlgorithm, hashAlgorithm, keyBits, blockSize, chainingMode)
{
;
}
protected static IEncryptionInfoBuilder GetBuilder(EncryptionMode encryptionMode)
{
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
Type t = null;
foreach (Assembly assembly in assemblies)
{
t = assembly.GetType(encryptionMode.Builder);
if (t != null)
{
break;
}
}
if (t == null)
{
throw new EncryptedDocumentException("Not found type " + encryptionMode.Builder);
}
IEncryptionInfoBuilder eib = null;
eib = (IEncryptionInfoBuilder)t.Assembly.CreateInstance(encryptionMode.Builder);
return(eib);
}
/**
* Prepares for encryption, using the given Encryption Mode, and
* all other parameters as default.
* @see #EncryptionInfo(EncryptionMode, CipherAlgorithm, HashAlgorithm, int, int, ChainingMode)
*/
public EncryptionInfo(EncryptionMode encryptionMode)
: this(encryptionMode, null, null, -1, -1, null)
{
}
/**
* @deprecated Use {@link #EncryptionInfo(EncryptionMode)} (dir parameter no longer required)
*/
public EncryptionInfo(DirectoryNode dir, EncryptionMode encryptionMode)
: this(encryptionMode)
{
;
}
/**
* @deprecated Use {@link #EncryptionInfo(EncryptionMode)} (fs parameter no longer required)
*/
public EncryptionInfo(NPOIFSFileSystem fs, EncryptionMode encryptionMode)
: this(encryptionMode)
{
;
}
