133 lines
6.3 KiB
C
133 lines
6.3 KiB
C
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//==========================================================================
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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// PURPOSE.
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//
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// Copyright (c) 1999 - 2001 On2 Technologies Inc. All Rights Reserved.
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//
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//--------------------------------------------------------------------------
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#if !defined(ON2CRYPT_H)
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#define ON2CRYPT_H
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//______________________________________________________________________________
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//
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// On2Crypt.h
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// API to on2comp's encryption dll
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//--------------------------------------------------------------------------
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#ifdef _USRDLL
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#define DLLExport __declspec(dllexport)
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#else
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#define DLLExport
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#endif
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#define DLLCC __stdcall
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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typedef void* HOn2Encryptor;
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DLLExport int DLLCC MakeEncryptor(unsigned char* pString, int iLength, HOn2Encryptor* phOn2Encryptor);
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//***************************************************************************************
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// Name : MakeEncryptor
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// Description: set up an encryption session
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// Inputs : pString -> information to be used by encryptor to set up encryption session
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// iLength -> number of bytes used in pString
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// Outputs : phOn2Encryptor -> pointer to an encryption session
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC GetEncryptionCode(char* pfccCode); // size of szCode must be >= 4
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//***************************************************************************************
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// Name : GetEncryptionCode
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// Description: get the 4 character code to use as a reference for this encryption dll
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// Inputs :
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// Outputs : pfccCode 4 character code
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC GetDRMXLength(HOn2Encryptor hOn2Encryptor, int* piLength);
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//***************************************************************************************
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// Name : GetDRMXLength
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// Description: calculates the length of decryption chunk to be produced
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// Inputs : hOn2Encryptor -> handle of encryption sesion to use ( from make encryptor)
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// Outputs : piLength -> filled with length of extra information
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC GenerateDRMX(HOn2Encryptor hOn2Encryptor, unsigned char* pBuffer);
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//***************************************************************************************
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// Name : GenerateDRMX
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// Description: generates a decryption chunk
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// Inputs : hOn2Encryptor -> handle of encryption sesion to use ( from make encryptor)
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// Outputs : pBuffer is filled with information necessary to decrypt the file we are
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// encrypting
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC EncryptedSize(HOn2Encryptor hOn2Encryptor, int iSizeIn, int* piSizeOut);
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//***************************************************************************************
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// Name : EncryptedSize
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// Description: returns size that an encrypted chunk will be given a size in
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// Inputs : hOn2Encryptor -> handle of encryption sesion to use ( from make encryptor)
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// : iSizeIn -> size of input data
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// Outputs : piSizeOut -> size of output data
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC EncryptBytes(HOn2Encryptor hOn2Encryptor, unsigned char* pBufferIn, int iSizeIn, unsigned char* pBufferOut, int iSizeOutMax, int* piSizeOut);
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//***************************************************************************************
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// Name : EncryptBytes
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// Description: encrypts bytes in input buffer and stores them to the output buffer
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// Inputs : hOn2Encryptor -> handle of encryption sesion to use ( from make encryptor)
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// : pBufferIn -> buffer holding bytes to encrypt
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// iSizeIn -> number of bytes to encrypt of that buffer
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// Outputs : pBufferOut -> buffer for holding encrypted bytes
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// iSizeOutMax -> maximum number of bytes to write to pBufferOut
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// piSizeOut -> number of bytes actually written to pbufferout
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC EncryptorError(char* szError, int nErrorMax);
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//***************************************************************************************
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// Name : EncryptorError
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// Description: gets a string description of the last error
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// Inputs : szError -> pointer to string
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// nErrorMax -> the largest number of bytes to fill in in szerror
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// Outputs :
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// Returns : 0 = success
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//***************************************************************************************
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DLLExport int DLLCC DeleteEncryptor(HOn2Encryptor hOn2Encryptor);
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//***************************************************************************************
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// Name : DeleteEncryptor
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// Description: ends the encryption session and cleans up
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// Inputs : hOn2Encryptor -> handle of encryption sesion to use ( from make encryptor)
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// Outputs :
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// Returns : 0 = success
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//***************************************************************************************
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typedef int (DLLCC *PFNMakeEncryptor)(unsigned char* pString, int iLength, HOn2Encryptor* phOn2Encryptor);
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typedef int (DLLCC *PFNGetEncryptionCode)(char* pfccCode); // size of szCode must be >= 4
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typedef int (DLLCC *PFNGetDRMXLength)(HOn2Encryptor hOn2Encryptor, int* piLength);
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typedef int (DLLCC *PFNGenerateDRMX)(HOn2Encryptor hOn2Encryptor, unsigned char* pBuffer);
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typedef int (DLLCC *PFNEncryptedSize)(HOn2Encryptor hOn2Encryptor, int iSizeIn, int* piSizeOut);
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typedef int (DLLCC *PFNEncryptBytes)(HOn2Encryptor hOn2Encryptor, unsigned char* pBufferIn, int iSizeIn, unsigned char* pBufferOut, int iSizeOutMax, int* piSizeOut);
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typedef int (DLLCC *PFNEncryptorError)(char* szError, int nErrorMax);
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typedef int (DLLCC *PFNDeleteEncryptor)(HOn2Encryptor hOn2Encryptor);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // ON2CRYPT_H
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