aes_ctr.h

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/*
 * aes_ctr.h
 *
 * AES-CTR Implementation
 *
 * Copyright 2019-2024 DigiCert, Inc. All Rights Reserved.
 * Proprietary and Confidential Material.
 *
 */
/*------------------------------------------------------------------*/

#ifndef __AES_CTR_HEADER__
#define __AES_CTR_HEADER__

#include "../cap/capdecl.h"

#if defined(__ENABLE_MOCANA_CRYPTO_INTERFACE__)
#include "../crypto_interface/crypto_interface_aes_ctr_priv.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif


/*------------------------------------------------------------------*/

/*  The structure for key information */
typedef struct aesCTRCipherContext
{
    aesCipherContext     *pCtx;
    union
    {
        ubyte               counterBlock[AES_BLOCK_SIZE];   /* counter block */
        ubyte4              ctr[4];
    } u;
    ubyte               encBlock[AES_BLOCK_SIZE];       /* encrypted counter block */
    ubyte               offset;                         /* offset of unused byte in the encBlock */
    MocSymCtx         pMocSymCtx;
    ubyte             enabled;
} aesCTRCipherContext, AES_CTR_Ctx;



/*------------------------------------------------------------------*/

/*  Function prototypes  */
/* for AES CTR, the keyMaterial is key + block --- iv is NOT used in DoAESCTR */
/* for RFC3686, construct the block and do not pass the IV as the iv argument */
/* the block is incremented by 1 for each encryption so as to be compatible with RFC 3686
and the EAX mode -- */

#ifdef __UCOS_DIRECT_RTOS__

MOC_EXTERN BulkCtx  CreateAESCTRCtx(MOC_SYM(hwAccelDescr hwAccelCtx) ubyte* keyMaterial, sbyte4 keyLength, sbyte4 encrypt);
#else
MOC_EXTERN BulkCtx  CreateAESCTRCtx(MOC_SYM(hwAccelDescr hwAccelCtx) const ubyte* keyMaterial, sbyte4 keyLength, sbyte4 encrypt);
#endif /* __UCOS_DIRECT_RTOS__ */

MOC_EXTERN MSTATUS  DeleteAESCTRCtx(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx *ctx);

MOC_EXTERN MSTATUS  DoAESCTR(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx ctx, ubyte* data, sbyte4 dataLength, sbyte4 encrypt, ubyte* iv);

/* this might be easier to use in some cases */

MOC_EXTERN MSTATUS AESCTRInit(MOC_SYM(hwAccelDescr hwAccelCtx) AES_CTR_Ctx* aesCtrCtx, const ubyte* keyMaterial, sbyte4 keyLength, const ubyte initCounter[AES_BLOCK_SIZE]);

MOC_EXTERN MSTATUS  DoAESCTREx(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx ctx, ubyte* data, sbyte4 dataLength, sbyte4 encrypt, ubyte* iv, sbyte4 limit);

MOC_EXTERN MSTATUS  GetCounterBlockAESCTR(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx ctx, ubyte pCounterBuffer[AES_BLOCK_SIZE]);

MOC_EXTERN MSTATUS CloneAESCTRCtx(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx pCtx, BulkCtx *ppNewCtx);

#ifdef __ENABLE_MOCANA_IPSEC_SERVICE__

MOC_EXTERN BulkCtx  CreateAesCtrCtx(MOC_SYM(hwAccelDescr hwAccelCtx) ubyte* keyMaterial,
                                sbyte4 keyLength, sbyte4 encrypt);

MOC_EXTERN MSTATUS  DoAesCtr(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx ctx, ubyte* data,
                         sbyte4 dataLength, sbyte4 encrypt, ubyte* iv);

MOC_EXTERN MSTATUS  DoAesCtrEx(MOC_SYM(hwAccelDescr hwAccelCtx) BulkCtx ctx, ubyte* data,
                         sbyte4 dataLength, sbyte4 encrypt, ubyte* iv);
#endif


#ifdef __cplusplus
}
#endif

#endif /* __AES_CTR_HEADER__ */