Class SecurityHandler

Namespace

iText.Kernel.Crypto.Securityhandler

Assembly

itext.kernel.dll

public abstract class SecurityHandler

Inheritance

object

SecurityHandler

Derived

PubKeySecurityHandler

StandardSecurityHandler

Inherited Members

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Constructors

SecurityHandler()

protected SecurityHandler()

Fields

extra

Work area to prepare the object/generation bytes

protected byte[] extra

Field Value

byte[]

md5

protected IDigest md5

Field Value

IDigest

mkey

The global encryption key

protected byte[] mkey

Field Value

byte[]

nextObjectKey

The encryption key for a particular object/generation.

protected byte[] nextObjectKey

Field Value

byte[]

Remarks

The encryption key for a particular object/generation. It is recalculated with SetHashKeyForNextObject(int, int) for every object individually based in its object/generation.

nextObjectKeySize

The encryption key length for a particular object/generation It is recalculated with SetHashKeyForNextObject(int, int) for every object individually based in its object/generation.

protected int nextObjectKeySize

Field Value

int

Methods

GetDecryptor()

public abstract IDecryptor GetDecryptor()

Returns

IDecryptor

GetEncryptionStream(Stream)

public abstract OutputStreamEncryption GetEncryptionStream(Stream os)

Parameters

os Stream

Returns

OutputStreamEncryption

SetHashKeyForNextObject(int, int)

Note: For most of the supported security handlers algorithm to calculate encryption key for particular object is the same.

public virtual void SetHashKeyForNextObject(int objNumber, int objGeneration)

Parameters

objNumber int

number of particular object for encryption

objGeneration int

generation of particular object for encryption