Class TDecryptFilter

TDecryptFilter

Support

Supported from 5.0

Description

A decrypting filter.

An object of this type is used by RDecryptStream to decrypt stream data as it is read from a source stream.

Decryption itself is performed by a decryption handling object, an instance of a class implementing the CSecurityDecryptBase interface.

Derivation

MStreamBuf A stream buffer that provides a generic I/O interface for streamed data TDecryptFilter A decrypting filter TSecureFilter Base class used in the derivation of TEncryptFilter and TDecryptFilter TStreamFilter Interface to a stream filter

Defined in TDecryptFilter:
Set(), TDecryptFilter()

Inherited from MStreamBuf:
SeekL(), Close(), DoSeekL(), ERead, EWrite, PushL(), Read(), ReadL(), Release(), SeekL(), SizeL(), Synch(), SynchL(), TMark, TRead, TWrite, TellL(), Write(), WriteL()

Inherited from TStreamFilter:
Committed(), DoReadL(), DoRelease(), DoSynchL(), DoWriteL(), EmitL(), FilterL(), IsCommitted()

See also:

• RDecryptStream
• CSecureStore
• CSecurityDecryptBase

TDecryptFilter();

Description

Constructs an empty decrypting filter object.

The decrypting filter must be set up before use.

See also:

• Set()

void Set(MStreamBuf* aHost,CSecurityDecryptBase* aKey,TInt aMode=ERead);

Description

Sets up the decrypting filter.

Parameters

MStreamBuf* aHost The stream buffer that is the source of encrypted data. CSecurityDecryptBase* aKey A decryption handling object. TInt aMode The mode in which the stream buffer is to be used. By default, this is read mode as represented by ERead.

See also:

• MStreamBuf::TRead
• TStreamFilter::Set()