SFBHashCTX

Wrapper Class for the IHashCTX interface.

#include <SFBHashCTX.h.hpp>

class SFBHashCTX : public SFBQuery;

SFMTYPEDEFWRAPPER(SFBHashCTX)

Inheritance diagram

Version

BREW 2.0	BREW 2.1	BREW 3.1
O	O	O

Reference

BREW API IHashCTX

Member

Public Functions
`SFCError`	Final( `VoidPtr` hash , `SInt32` hashSize , `VoidPtr` result , `SInt32Ptr` resultSize ) Final( `SFXBufferPtr` hash , `SFXBufferPtr` result ) Get the hashed result after all the calls to SFBHashCTX::Update().
`Void`	Init( `VoidPtr` hash , `SInt32` hashSize ) Init( `SFXBufferPtr` hash ) Start or restart the hashing process.
static `SFBHashCTXSmp`	NewInstance( `AEECLSID` clsid ) Create a new instance of SFBHashCTX class.
`Void`	Update( `VoidPtr` hash , `SInt32` hashSize , `VoidConstPtr` data , `SInt32` dataLength ) Update( `SFXBufferPtr` hash , `SFXBufferConstRef` data ) Feed data to the hash object.
`SFCError`	QueryInterface( `AEECLSID` clsid , `VoidHandle` handle ) (inherits from SFBQuery) QueryInterface( `AEECLSID` clsid , `SFBBaseSmpPtr` handle ) (inherits from SFBQuery) Ask an object for another API contract from the object in question.
`SFBBaseSmp`	QueryInterface( `AEECLSID` clsid ) (inherits from SFBQuery) Ask an object for another API contract from the object in question.
`Void`	Self( `AEECLSID` clsidReq , `SFBQuerySmpPtr` clone , `AEECLSID` clsidImp ) (inherits from SFBQuery) Helper macro for those implementing an object with a single interface.
`SFBQuerySmp`	Self( `AEECLSID` clsidReq , `AEECLSID` clsidImp ) (inherits from SFBQuery) Helper macro for those implementing an object with a single interface.

SFBHashCTX::Final

Get the hashed result after all the calls to SFBHashCTX::Update().

[ public ]
SFCError Final(
    VoidPtr hash           // pointer to a hash context structure
    SInt32 hashSize        // the size of the hash context structure 

    VoidPtr result         // pointer to the data to get the hashed result
    SInt32Ptr resultSize   // pointer to the size of the buffer Data. 
                           // on return, this contains the size of the hashed result
);

[ public ]
SFCError Final(
    SFXBufferPtr hash     // pointer to a hash context structure
    SFXBufferPtr result   // pointer to the data to get the hashed result.
                          // the size of the data can be modified automatically
);

Description

Warning: Buffer size can not over the limit of a SInt32 value.

Reference

BREW API IHASHCTX_Final

SFBHashCTX::Init

Start or restart the hashing process.

[ public ]
Void Init(
    VoidPtr hash      // pointer to a hash context structure
    SInt32 hashSize   // the size of the hash context structure
);

[ public ]
Void Init(
    SFXBufferPtr hash   // pointer to a hash context structure.
                        // if null, do nothing
);

Description

This is required if you need to hash new streams of data.

Reference

BREW API IHASHCTX_Init

SFBHashCTX::NewInstance

Create a new instance of SFBHashCTX class.

[ public, static ]
SFBHashCTXSmp NewInstance(
    AEECLSID clsid   // ClassID of Hash algorithm
);

Description

The available ClassID is as below.

AEECLSID_MD2

AEECLSID_MD5

AEECLSID_SHA1

SFBHashCTX::Update

Feed data to the hash object.

[ public ]
Void Update(
    VoidPtr hash        // pointer to a hash context structure 
    SInt32 hashSize     // the size of the hash context structure 
    VoidConstPtr data   // pointer to the data to be hashed 
    SInt32 dataLength   // length of the data to be hashed(stored in data) 
);

[ public ]
Void Update(
    SFXBufferPtr hash        // pointer to a hash context structure
                             // if null,do nothing
    SFXBufferConstRef data   // pointer to the data to be hashed
);

Description

This function can be called multiple times to hash long streams or discontinous streams of data.

Reference

BREW API IHASHCTX_Update