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//+---------------------------------------------------------------------------
//
// File: cryptfnc.h
//
// Contents: Defines the Class CCryptFunctions
//
//
// History: AshishS Created 11/28/96
//
//----------------------------------------------------------------------------
#ifndef _CRYPT_FNC_H
#define _CRYPT_FNC_H
#define CRYPT_FNC_ID 2983
#include <windows.h>
#include <wincrypt.h>
#define CRYPT_FNC_NO_ERROR 0
#define CRYPT_FNC_BAD_PASSWORD 1
#define CRYPT_FNC_INSUFFICIENT_BUFFER 2
#define CRYPT_FNC_INIT_NOT_CALLED 3
#define CRYPT_FNC_INTERNAL_ERROR 4
#define CRYPTFNC_SEMAPHORE_NAME TEXT("SS_Cryptfnc_Semaphore_For_CAPI")
class CCryptFunctions{ HCRYPTPROV m_hProv; HANDLE m_hSemaphore; BOOL GenerateSessionKeyFromPassword( HCRYPTKEY * phKey, // location to store the key
TCHAR * pszPassword); // password to generate the key from
public:
CCryptFunctions(); ~CCryptFunctions(); BOOL InitCrypt(); BOOL GenerateSecretKey( BYTE * pbData,// Buffer to store secret key
//buffer must be long enough for dwLength bytes
DWORD dwLength ); // length of secret key in bytes
BOOL EncryptDataWithPassword( TCHAR * pszPassword, // password
BYTE * pbData, // Data to be encrypted
DWORD dwDataLength, // Length of data in bytes
BYTE * pbEncyrptedData, // Encrypted secret key will be stored here
DWORD * pdwEncrytedBufferLen // Length of this buffer
);
BOOL CCryptFunctions::GenerateHash( BYTE * pbData, // data to hash
DWORD dwDataLength, // length of data to hash
BYTE * pbData1, // another data to hash
DWORD dwData1Length, // length of above data
BYTE * pbData2, // another data to hash
DWORD dwData2Length, // length of above data
BYTE * pbData3, // another data to hash
DWORD dwData3Length, // length of above data
BYTE * pbHashBuffer, // buffer to store hash
DWORD * pdwHashBufLen);//length of buffer to store Hash
DWORD DecryptDataWithPassword( TCHAR * pszPassword, // password
BYTE * pbData, // Decrypted Data will be stored here
DWORD *pdwDataBufferLength, // Length of the above buffer in bytes
BYTE * pbEncryptedData, // Encrypted data
DWORD dwEncrytedDataLen // Length of encrypted data
); DWORD EncryptDataAndExportSessionKey( BYTE * pbData, // Secret Data
DWORD dwDataLen, // Secret Data Length
BYTE * pbEncryptedData, // Buffer to store Encrypted Data
DWORD * pdwEncrytedBufferLen, // Length of above buffer
BYTE * pbEncryptedSessionKey, // Buffer to store encrypted session key
DWORD * pdwEncrytedSessionKeyLength); // Length of above buffer
DWORD ImportSessionKeyAndDecryptData( BYTE * pbData, // Buffer to store secret Data
DWORD * pdwDataLen, // Length of Above buffer
BYTE * pbEncryptedData, // Buffer that stores Encrypted Data
DWORD dwEncrytedBufferLen, // Length of above data
BYTE * pbEncryptedSessionKey,// Buffer that stores encrypted sessionkey
DWORD dwEncrytedSessionKeyLength); // Length of above data
};
typedef CCryptFunctions CCRYPT_FUNCTIONS;typedef CCryptFunctions *PCCRYPT_FUNCTIONS;
#endif
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