/////////////////////////////////////////////////////////////////////////////
//  FILE          : schderiv.h                                             //
//  DESCRIPTION   :                                                        //
//  AUTHOR        :                                                        //
//  HISTORY       :                                                        //
//      Oct  9 1997 jeffspel  Create                                       //
//                                                                         //
//  Copyright (C) 1993 Microsoft Corporation   All Rights Reserved         //
/////////////////////////////////////////////////////////////////////////////

#ifndef __SCHDERIV_H__
#define __SCHDERIV_H__

#ifdef __cplusplus
extern "C" {
#endif

#define     RC_KEYLEN            16
#define     MAX_PREMASTER_LEN   512  // DH key must be <= 4096 bits
#define     MAX_RANDOM_LEN      256

#define     TLS_MASTER_LEN       48
#define     SSL3_MASTER_LEN      48

// definition of a Secure Channel hash structure
typedef struct _SCH_KeyData
{
    BYTE        rgbPremaster[MAX_PREMASTER_LEN];
    DWORD       cbPremaster;
    BYTE        rgbClientRandom[MAX_RANDOM_LEN];
    DWORD       cbClientRandom;
    BYTE        rgbServerRandom[MAX_RANDOM_LEN];
    DWORD       cbServerRandom;
    ALG_ID      EncAlgid;
    ALG_ID      HashAlgid;
    DWORD       cbEnc;
    DWORD       cbEncMac;
    DWORD       cbHash;
    DWORD       cbIV;
    BOOL        fFinished;
    BOOL        dwFlags;
} SCH_KEY, *PSCH_KEY;

// definition of a Secure Channel hash structure
typedef struct _SCH_HashData
{
    ALG_ID      ProtocolAlgid;
    ALG_ID      EncAlgid;
    ALG_ID      HashAlgid;
    DWORD       cbEnc;
    DWORD       cbEncMac;
    DWORD       cbHash;
    DWORD       cbIV;
    BYTE        rgbClientRandom[MAX_RANDOM_LEN];
    DWORD       cbClientRandom;
    BYTE        rgbServerRandom[MAX_RANDOM_LEN];
    DWORD       cbServerRandom;
    BYTE        rgbFinal[MAX_RANDOM_LEN];
    DWORD       cbFinal;
    BOOL        dwFlags;
} SCH_HASH, *PSCH_HASH;

// definition of a TLS1 PRF hash structure
typedef struct _PRF_HashData
{
    BYTE        rgbLabel[MAX_RANDOM_LEN];
    DWORD       cbLabel;
    BYTE        rgbSeed[MAX_RANDOM_LEN];
    DWORD       cbSeed;
    BYTE        rgbMasterKey[TLS_MASTER_LEN];
} PRF_HASH;

extern DWORD
SCHSetKeyParam(
    IN Context_t *pContext,
    IN Key_t *pKey,
    IN DWORD dwParam,
    IN CONST BYTE *pbData);

extern BOOL
SCHGetKeyParam(
    Key_t *pKey,
    DWORD dwParam,
    PBYTE pbData);

extern DWORD
SChGenMasterKey(
    Key_t *pKey,
    PSCH_HASH pSChHash);

extern DWORD
SecureChannelDeriveKey(
    Hash_t *pHash,
    ALG_ID Algid,
    DWORD dwFlags,
    HCRYPTKEY *phKey);

extern DWORD
SetPRFHashParam(
    PRF_HASH *pPRFHash,
    DWORD dwParam,
    CONST BYTE *pbData);

extern DWORD
CalculatePRF(
    PRF_HASH *pPRFHash,
    BYTE *pbData,
    DWORD *pcbData);

#ifdef __cplusplus
}
#endif

#endif // __SCHDERIV_H__