/* aes.h
 *
 * Copyright (C) 2006-2020 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */

/*!
    \file wolfssl/wolfcrypt/aes.h
*/
/*

DESCRIPTION
This library provides the interfaces to the Advanced Encryption Standard (AES)
for encrypting and decrypting data. AES is the standard known for a symmetric
block cipher mechanism that uses n-bit binary string parameter key with 128-bits,
192-bits, and 256-bits of key sizes.

*/
#ifndef WOLF_CRYPT_AES_H
#define WOLF_CRYPT_AES_H

#include <wolfssl/wolfcrypt/types.h>

#ifndef NO_AES

#if defined(HAVE_FIPS) && \
    defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
    #include <wolfssl/wolfcrypt/fips.h>
#endif /* HAVE_FIPS_VERSION >= 2 */

/* included for fips @wc_fips */
#if defined(HAVE_FIPS) && \
    (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
#include <cyassl/ctaocrypt/aes.h>
#if defined(CYASSL_AES_COUNTER) && !defined(WOLFSSL_AES_COUNTER)
    #define WOLFSSL_AES_COUNTER
#endif
#if !defined(WOLFSSL_AES_DIRECT) && defined(CYASSL_AES_DIRECT)
    #define WOLFSSL_AES_DIRECT
#endif
#endif

#ifndef WC_NO_RNG
    #include <wolfssl/wolfcrypt/random.h>
#endif
#ifdef STM32_CRYPTO
    #include <wolfssl/wolfcrypt/port/st/stm32.h>
#endif

#ifdef WOLFSSL_IMXRT_DCP
    #include "fsl_dcp.h"
#endif

#ifdef WOLFSSL_XILINX_CRYPT
#include "xsecure_aes.h"
#endif

#if defined(WOLFSSL_AFALG) || defined(WOLFSSL_AFALG_XILINX_AES)
/* included for struct msghdr */
#include <wolfssl/wolfcrypt/port/af_alg/wc_afalg.h>
#endif

#if defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC)
#include <wolfssl/wolfcrypt/port/devcrypto/wc_devcrypto.h>
#endif

#ifdef WOLFSSL_SILABS_SE_ACCEL
    #include <wolfssl/wolfcrypt/port/silabs/silabs_aes.h>
#endif


#if defined(HAVE_AESGCM) && !defined(WC_NO_RNG)
    #include <wolfssl/wolfcrypt/random.h>
#endif

#if defined(WOLFSSL_CRYPTOCELL)
    #include <wolfssl/wolfcrypt/port/arm/cryptoCell.h>
#endif

#if defined(WOLFSSL_RENESAS_TSIP_TLS) && \
    defined(WOLFSSL_RENESAS_TSIP_TLS_AES_CRYPT)
    #include <wolfssl/wolfcrypt/port/Renesas/renesas-tsip-crypt.h>
#endif

#ifdef __cplusplus
    extern "C" {
#endif

#ifndef WOLFSSL_AES_KEY_SIZE_ENUM
#define WOLFSSL_AES_KEY_SIZE_ENUM
/* these are required for FIPS and non-FIPS */
enum {
    AES_128_KEY_SIZE    = 16,  /* for 128 bit             */
    AES_192_KEY_SIZE    = 24,  /* for 192 bit             */
    AES_256_KEY_SIZE    = 32,  /* for 256 bit             */

    AES_IV_SIZE         = 16,  /* always block size       */
};
#endif

/* avoid redefinition of structs */
#if !defined(HAVE_FIPS) || \
    (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))

#ifdef WOLFSSL_ASYNC_CRYPT
    #include <wolfssl/wolfcrypt/async.h>
#endif

enum {
    AES_ENC_TYPE   = WC_CIPHER_AES,   /* cipher unique type */
    AES_ENCRYPTION = 0,
    AES_DECRYPTION = 1,

    AES_BLOCK_SIZE      = 16,

    KEYWRAP_BLOCK_SIZE  = 8,

    GCM_NONCE_MAX_SZ = 16, /* wolfCrypt's maximum nonce size allowed. */
    GCM_NONCE_MID_SZ = 12, /* The usual default nonce size for AES-GCM. */
    GCM_NONCE_MIN_SZ = 8,  /* wolfCrypt's minimum nonce size allowed. */
    CCM_NONCE_MIN_SZ = 7,
    CCM_NONCE_MAX_SZ = 13,
    CTR_SZ   = 4,
    AES_IV_FIXED_SZ = 4,
#ifdef WOLFSSL_AES_CFB
    AES_CFB_MODE = 1,
#endif
#ifdef WOLFSSL_AES_OFB
    AES_OFB_MODE = 2,
#endif
#ifdef WOLFSSL_AES_XTS
    AES_XTS_MODE = 3,
#endif

#ifdef HAVE_PKCS11
    AES_MAX_ID_LEN      = 32,
    AES_MAX_LABEL_LEN   = 32,
#endif
};


struct Aes {
    /* AESNI needs key first, rounds 2nd, not sure why yet */
    ALIGN16 word32 key[60];
    word32  rounds;
    int     keylen;

    ALIGN16 word32 reg[AES_BLOCK_SIZE / sizeof(word32)];      /* for CBC mode */
    ALIGN16 word32 tmp[AES_BLOCK_SIZE / sizeof(word32)];      /* same         */

#if defined(HAVE_AESGCM) || defined(HAVE_AESCCM)
    word32 invokeCtr[2];
    word32 nonceSz;
#endif
#ifdef HAVE_AESGCM
    ALIGN16 byte H[AES_BLOCK_SIZE];
#ifdef OPENSSL_EXTRA
    word32 aadH[4]; /* additional authenticated data GHASH */
    word32 aadLen;  /* additional authenticated data len */
#endif

#ifdef GCM_TABLE
    /* key-based fast multiplication table. */
    ALIGN16 byte M0[256][AES_BLOCK_SIZE];
#elif defined(GCM_TABLE_4BIT)
    #if defined(BIG_ENDIAN_ORDER) || defined(WC_16BIT_CPU)
        ALIGN16 byte M0[16][AES_BLOCK_SIZE];
    #else
        ALIGN16 byte M0[32][AES_BLOCK_SIZE];
    #endif
#endif /* GCM_TABLE */
#ifdef HAVE_CAVIUM_OCTEON_SYNC
    word32 y0;
#endif
#endif /* HAVE_AESGCM */
#ifdef WOLFSSL_AESNI
    byte use_aesni;
#endif /* WOLFSSL_AESNI */
#ifdef WOLF_CRYPTO_CB
    int    devId;
    void*  devCtx;
#endif
#ifdef HAVE_PKCS11
    byte id[AES_MAX_ID_LEN];
    int  idLen;
    char label[AES_MAX_LABEL_LEN];
    int  labelLen;
#endif
#ifdef WOLFSSL_ASYNC_CRYPT
    WC_ASYNC_DEV asyncDev;
#endif /* WOLFSSL_ASYNC_CRYPT */
#if defined(WOLFSSL_AES_COUNTER) || defined(WOLFSSL_AES_CFB) || \
    defined(WOLFSSL_AES_OFB) || defined(WOLFSSL_AES_XTS)
    word32  left;            /* unused bytes left from last call */
#endif
#ifdef WOLFSSL_XILINX_CRYPT
    XSecure_Aes xilAes;
    XCsuDma     dma;
    word32      key_init[8];
    word32      kup;
#endif
#if defined(WOLFSSL_AFALG) || defined(WOLFSSL_AFALG_XILINX_AES)
    int alFd; /* server socket to bind to */
    int rdFd; /* socket to read from */
    struct msghdr msg;
    int dir;  /* flag for encrpyt or decrypt */
#ifdef WOLFSSL_AFALG_XILINX_AES
    word32 msgBuf[CMSG_SPACE(4) + CMSG_SPACE(sizeof(struct af_alg_iv) +
                  GCM_NONCE_MID_SZ)];
#endif
#endif
#if defined(WOLF_CRYPTO_CB) || (defined(WOLFSSL_DEVCRYPTO) && \
    (defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC))) || \
    (defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_AES))
    word32 devKey[AES_MAX_KEY_SIZE/WOLFSSL_BIT_SIZE/sizeof(word32)]; /* raw key */
#ifdef HAVE_CAVIUM_OCTEON_SYNC
    int    keySet;
#endif
#endif
#if defined(WOLFSSL_DEVCRYPTO) && \
    (defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC))
    WC_CRYPTODEV ctx;
#endif
#if defined(WOLFSSL_CRYPTOCELL)
    aes_context_t ctx;
#endif
#if defined(WOLFSSL_RENESAS_TSIP_TLS) && \
    defined(WOLFSSL_RENESAS_TSIP_TLS_AES_CRYPT)
    TSIP_AES_CTX ctx;
#endif
#if defined(WOLFSSL_IMXRT_DCP)
    dcp_handle_t handle;
#endif
#if defined(WOLFSSL_SILABS_SE_ACCEL)
    silabs_aes_t ctx;
#endif
    void*  heap; /* memory hint to use */
};

#ifndef WC_AES_TYPE_DEFINED
    typedef struct Aes Aes;
    #define WC_AES_TYPE_DEFINED
#endif

#ifdef WOLFSSL_AES_XTS
typedef struct XtsAes {
    Aes aes;
    Aes tweak;
} XtsAes;
#endif

#ifdef HAVE_AESGCM
typedef struct Gmac {
    Aes aes;
} Gmac;
#endif /* HAVE_AESGCM */
#endif /* HAVE_FIPS */


/* Authenticate cipher function prototypes */
typedef int (*wc_AesAuthEncryptFunc)(Aes* aes, byte* out,
                                   const byte* in, word32 sz,
                                   const byte* iv, word32 ivSz,
                                   byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);
typedef int (*wc_AesAuthDecryptFunc)(Aes* aes, byte* out,
                                   const byte* in, word32 sz,
                                   const byte* iv, word32 ivSz,
                                   const byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);

/* AES-CBC */
WOLFSSL_API int  wc_AesSetKey(Aes* aes, const byte* key, word32 len,
                              const byte* iv, int dir);
WOLFSSL_API int  wc_AesSetIV(Aes* aes, const byte* iv);

#ifdef HAVE_AES_CBC
WOLFSSL_API int  wc_AesCbcEncrypt(Aes* aes, byte* out,
                                  const byte* in, word32 sz);
WOLFSSL_API int  wc_AesCbcDecrypt(Aes* aes, byte* out,
                                  const byte* in, word32 sz);
#endif

#ifdef WOLFSSL_AES_CFB
WOLFSSL_API int wc_AesCfbEncrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
WOLFSSL_API int wc_AesCfb1Encrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
WOLFSSL_API int wc_AesCfb8Encrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
#ifdef HAVE_AES_DECRYPT
WOLFSSL_API int wc_AesCfbDecrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
WOLFSSL_API int wc_AesCfb1Decrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
WOLFSSL_API int wc_AesCfb8Decrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
#endif /* HAVE_AES_DECRYPT */
#endif /* WOLFSSL_AES_CFB */

#ifdef WOLFSSL_AES_OFB
WOLFSSL_API int wc_AesOfbEncrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
#ifdef HAVE_AES_DECRYPT
WOLFSSL_API int wc_AesOfbDecrypt(Aes* aes, byte* out,
                                    const byte* in, word32 sz);
#endif /* HAVE_AES_DECRYPT */
#endif /* WOLFSSL_AES_OFB */

#ifdef HAVE_AES_ECB
WOLFSSL_API int wc_AesEcbEncrypt(Aes* aes, byte* out,
                                  const byte* in, word32 sz);
WOLFSSL_API int wc_AesEcbDecrypt(Aes* aes, byte* out,
                                  const byte* in, word32 sz);
#endif

/* AES-CTR */
#ifdef WOLFSSL_AES_COUNTER
 WOLFSSL_API int wc_AesCtrEncrypt(Aes* aes, byte* out,
                                   const byte* in, word32 sz);
#endif
/* AES-DIRECT */
#if defined(WOLFSSL_AES_DIRECT)
 WOLFSSL_API void wc_AesEncryptDirect(Aes* aes, byte* out, const byte* in);
 WOLFSSL_API void wc_AesDecryptDirect(Aes* aes, byte* out, const byte* in);
 WOLFSSL_API int  wc_AesSetKeyDirect(Aes* aes, const byte* key, word32 len,
                                const byte* iv, int dir);
#endif

#ifdef HAVE_AESGCM
#ifdef WOLFSSL_XILINX_CRYPT
 WOLFSSL_API int  wc_AesGcmSetKey_ex(Aes* aes, const byte* key, word32 len,
         word32 kup);
#elif defined(WOLFSSL_AFALG_XILINX_AES)
 WOLFSSL_LOCAL int  wc_AesGcmSetKey_ex(Aes* aes, const byte* key, word32 len,
         word32 kup);
#endif
 WOLFSSL_API int  wc_AesGcmSetKey(Aes* aes, const byte* key, word32 len);
 WOLFSSL_API int  wc_AesGcmEncrypt(Aes* aes, byte* out,
                                   const byte* in, word32 sz,
                                   const byte* iv, word32 ivSz,
                                   byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);
 WOLFSSL_API int  wc_AesGcmDecrypt(Aes* aes, byte* out,
                                   const byte* in, word32 sz,
                                   const byte* iv, word32 ivSz,
                                   const byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);

#ifndef WC_NO_RNG
 WOLFSSL_API int  wc_AesGcmSetExtIV(Aes* aes, const byte* iv, word32 ivSz);
 WOLFSSL_API int  wc_AesGcmSetIV(Aes* aes, word32 ivSz,
                                   const byte* ivFixed, word32 ivFixedSz,
                                   WC_RNG* rng);
 WOLFSSL_API int  wc_AesGcmEncrypt_ex(Aes* aes, byte* out,
                                   const byte* in, word32 sz,
                                   byte* ivOut, word32 ivOutSz,
                                   byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);
#endif /* WC_NO_RNG */

 WOLFSSL_API int wc_GmacSetKey(Gmac* gmac, const byte* key, word32 len);
 WOLFSSL_API int wc_GmacUpdate(Gmac* gmac, const byte* iv, word32 ivSz,
                               const byte* authIn, word32 authInSz,
                               byte* authTag, word32 authTagSz);
#ifndef WC_NO_RNG
 WOLFSSL_API int wc_Gmac(const byte* key, word32 keySz, byte* iv, word32 ivSz,
                               const byte* authIn, word32 authInSz,
                               byte* authTag, word32 authTagSz, WC_RNG* rng);
 WOLFSSL_API int wc_GmacVerify(const byte* key, word32 keySz,
                               const byte* iv, word32 ivSz,
                               const byte* authIn, word32 authInSz,
                               const byte* authTag, word32 authTagSz);
#endif /* WC_NO_RNG */
 WOLFSSL_LOCAL void GHASH(Aes* aes, const byte* a, word32 aSz, const byte* c,
                               word32 cSz, byte* s, word32 sSz);
#endif /* HAVE_AESGCM */
#ifdef HAVE_AESCCM
 WOLFSSL_LOCAL int wc_AesCcmCheckTagSize(int sz);
 WOLFSSL_API int  wc_AesCcmSetKey(Aes* aes, const byte* key, word32 keySz);
 WOLFSSL_API int  wc_AesCcmEncrypt(Aes* aes, byte* out,
                                   const byte* in, word32 inSz,
                                   const byte* nonce, word32 nonceSz,
                                   byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);
 WOLFSSL_API int  wc_AesCcmDecrypt(Aes* aes, byte* out,
                                   const byte* in, word32 inSz,
                                   const byte* nonce, word32 nonceSz,
                                   const byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);
 WOLFSSL_API int  wc_AesCcmSetNonce(Aes* aes,
                                   const byte* nonce, word32 nonceSz);
 WOLFSSL_API int  wc_AesCcmEncrypt_ex(Aes* aes, byte* out,
                                   const byte* in, word32 sz,
                                   byte* ivOut, word32 ivOutSz,
                                   byte* authTag, word32 authTagSz,
                                   const byte* authIn, word32 authInSz);
#endif /* HAVE_AESCCM */
#ifdef HAVE_AES_KEYWRAP
 WOLFSSL_API int  wc_AesKeyWrap(const byte* key, word32 keySz,
                                const byte* in, word32 inSz,
                                byte* out, word32 outSz,
                                const byte* iv);
 WOLFSSL_API int  wc_AesKeyUnWrap(const byte* key, word32 keySz,
                                const byte* in, word32 inSz,
                                byte* out, word32 outSz,
                                const byte* iv);
#endif /* HAVE_AES_KEYWRAP */

#ifdef WOLFSSL_AES_XTS

WOLFSSL_API int wc_AesXtsSetKey(XtsAes* aes, const byte* key,
         word32 len, int dir, void* heap, int devId);

WOLFSSL_API int wc_AesXtsEncryptSector(XtsAes* aes, byte* out,
         const byte* in, word32 sz, word64 sector);

WOLFSSL_API int wc_AesXtsDecryptSector(XtsAes* aes, byte* out,
         const byte* in, word32 sz, word64 sector);

WOLFSSL_API int wc_AesXtsEncrypt(XtsAes* aes, byte* out,
         const byte* in, word32 sz, const byte* i, word32 iSz);

WOLFSSL_API int wc_AesXtsDecrypt(XtsAes* aes, byte* out,
        const byte* in, word32 sz, const byte* i, word32 iSz);

WOLFSSL_API int wc_AesXtsFree(XtsAes* aes);
#endif

WOLFSSL_API int wc_AesGetKeySize(Aes* aes, word32* keySize);

WOLFSSL_API int  wc_AesInit(Aes* aes, void* heap, int devId);
#ifdef HAVE_PKCS11
WOLFSSL_API int  wc_AesInit_Id(Aes* aes, unsigned char* id, int len, void* heap,
        int devId);
WOLFSSL_API int  wc_AesInit_Label(Aes* aes, const char* label, void* heap,
        int devId);
#endif
WOLFSSL_API void wc_AesFree(Aes* aes);

#ifdef __cplusplus
    } /* extern "C" */
#endif


#endif /* NO_AES */
#endif /* WOLF_CRYPT_AES_H */
