FreeBSD/Linux Kernel Cross Reference
sys/crypto/armv8/armv8_crypto.h

     /*-
      * Copyright (c) 2016 The FreeBSD Foundation
      *
      * This software was developed by Andrew Turner under
      * sponsorship from the FreeBSD Foundation.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _ARMV8_CRYPTO_H_
    #define _ARMV8_CRYPTO_H_
    
    #define AES256_ROUNDS   14
    #define AES_SCHED_LEN   ((AES256_ROUNDS + 1) * AES_BLOCK_LEN)
    
    typedef struct {
            uint32_t                aes_key[AES_SCHED_LEN/4];
            int                     aes_rounds;
    } AES_key_t;
    
    typedef union {
                    uint64_t u[2];
                    uint32_t d[4];
                    uint8_t c[16];
                    size_t t[16 / sizeof(size_t)];
    } __uint128_val_t;
    
    struct armv8_crypto_session {
            AES_key_t enc_schedule;
            AES_key_t dec_schedule;
            AES_key_t xts_schedule;
            __uint128_val_t Htable[16];
    };
    
    /* Prototypes for aesv8-armx.S */
    void aes_v8_encrypt(uint8_t *in, uint8_t *out, const AES_key_t *key);
    int aes_v8_set_encrypt_key(const unsigned char *userKey, const int bits, const AES_key_t *key);
    int aes_v8_set_decrypt_key(const unsigned char *userKey, const int bits, const AES_key_t *key);
    
    /* Prototypes for ghashv8-armx.S */
    void gcm_init_v8(__uint128_val_t Htable[16], const uint64_t Xi[2]);
    void gcm_gmult_v8(uint64_t Xi[2], const __uint128_val_t Htable[16]);
    void gcm_ghash_v8(uint64_t Xi[2], const __uint128_val_t Htable[16], const uint8_t *inp, size_t len);
    
    void armv8_aes_encrypt_cbc(const AES_key_t *key, size_t len,
        struct crypto_buffer_cursor *fromc, struct crypto_buffer_cursor *toc,
        const uint8_t iv[static AES_BLOCK_LEN]);
    void armv8_aes_decrypt_cbc(const AES_key_t *, size_t,
        struct crypto_buffer_cursor *fromc, struct crypto_buffer_cursor *toc,
        const uint8_t[static AES_BLOCK_LEN]);
    void armv8_aes_encrypt_gcm(AES_key_t *, size_t,
        struct crypto_buffer_cursor *, struct crypto_buffer_cursor *,
        size_t, const uint8_t *,
        uint8_t tag[static GMAC_DIGEST_LEN],
        const uint8_t[static AES_GCM_IV_LEN],
        const __uint128_val_t *);
    int armv8_aes_decrypt_gcm(AES_key_t *, size_t,
        struct crypto_buffer_cursor *, struct crypto_buffer_cursor *,
        size_t, const uint8_t *, const uint8_t tag[static GMAC_DIGEST_LEN],
        const uint8_t[static AES_GCM_IV_LEN],
        const __uint128_val_t *);
    
    void armv8_aes_encrypt_xts(AES_key_t *, const void *, size_t,
        struct crypto_buffer_cursor *, struct crypto_buffer_cursor *,
        const uint8_t[AES_BLOCK_LEN]);
    void armv8_aes_decrypt_xts(AES_key_t *, const void *, size_t,
        struct crypto_buffer_cursor *, struct crypto_buffer_cursor *,
        const uint8_t[AES_BLOCK_LEN]);
    
    #endif /* _ARMV8_CRYPTO_H_ */

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