e_aes.c

/* ====================================================================
 * Copyright (c) 2001-2014 The OpenSSL Project.  All rights reserved.
 *
 * 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.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 */

#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_AES
# include <openssl/evp.h>
# include <openssl/err.h>
# include <string.h>
# include <assert.h>
# include <openssl/aes.h>
# include "evp_locl.h"
# include "modes_lcl.h"
# include <openssl/rand.h>

typedef struct {
    union {
        double align;
        AES_KEY ks;
    } ks;
    block128_f block;
    union {
        cbc128_f cbc;
        ctr128_f ctr;
    } stream;
} EVP_AES_KEY;

typedef struct {
    union {
        double align;
        AES_KEY ks;
    } ks;                       /* AES key schedule to use */
    int key_set;                /* Set if key initialised */
    int iv_set;                 /* Set if an iv is set */
    GCM128_CONTEXT gcm;
    unsigned char *iv;          /* Temporary IV store */
    int ivlen;                  /* IV length */
    int taglen;
    int iv_gen;                 /* It is OK to generate IVs */
    int tls_aad_len;            /* TLS AAD length */
    ctr128_f ctr;
} EVP_AES_GCM_CTX;

typedef struct {
    union {
        double align;
        AES_KEY ks;
    } ks1, ks2;                 /* AES key schedules to use */
    XTS128_CONTEXT xts;
    void (*stream) (const unsigned char *in,
                    unsigned char *out, size_t length,
                    const AES_KEY *key1, const AES_KEY *key2,
                    const unsigned char iv[16]);
} EVP_AES_XTS_CTX;

typedef struct {
    union {
        double align;
        AES_KEY ks;
    } ks;                       /* AES key schedule to use */
    int key_set;                /* Set if key initialised */
    int iv_set;                 /* Set if an iv is set */
    int tag_set;                /* Set if tag is valid */
    int len_set;                /* Set if message length set */
    int L, M;                   /* L and M parameters from RFC3610 */
    CCM128_CONTEXT ccm;
    ccm128_f str;
} EVP_AES_CCM_CTX;

# ifndef OPENSSL_NO_OCB
typedef struct {
    union {
        double align;
        AES_KEY ks;
    } ksenc;                    /* AES key schedule to use for encryption */
    union {
        double align;
        AES_KEY ks;
    } ksdec;                    /* AES key schedule to use for decryption */
    int key_set;                /* Set if key initialised */
    int iv_set;                 /* Set if an iv is set */
    OCB128_CONTEXT ocb;
    unsigned char *iv;          /* Temporary IV store */
    unsigned char tag[16];
    unsigned char data_buf[16]; /* Store partial data blocks */
    unsigned char aad_buf[16];  /* Store partial AAD blocks */
    int data_buf_len;
    int aad_buf_len;
    int ivlen;                  /* IV length */
    int taglen;
} EVP_AES_OCB_CTX;
# endif

# define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))

# ifdef VPAES_ASM
int vpaes_set_encrypt_key(const unsigned char *userKey, int bits,
                          AES_KEY *key);
int vpaes_set_decrypt_key(const unsigned char *userKey, int bits,
                          AES_KEY *key);

void vpaes_encrypt(const unsigned char *in, unsigned char *out,
                   const AES_KEY *key);
void vpaes_decrypt(const unsigned char *in, unsigned char *out,
                   const AES_KEY *key);

void vpaes_cbc_encrypt(const unsigned char *in,
                       unsigned char *out,
                       size_t length,
                       const AES_KEY *key, unsigned char *ivec, int enc);
# endif
# ifdef BSAES_ASM
void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out,
                       size_t length, const AES_KEY *key,
                       unsigned char ivec[16], int enc);
void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
                                size_t len, const AES_KEY *key,
                                const unsigned char ivec[16]);
void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out,
                       size_t len, const AES_KEY *key1,
                       const AES_KEY *key2, const unsigned char iv[16]);
void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out,
                       size_t len, const AES_KEY *key1,
                       const AES_KEY *key2, const unsigned char iv[16]);
# endif
# ifdef AES_CTR_ASM
void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
                       size_t blocks, const AES_KEY *key,
                       const unsigned char ivec[AES_BLOCK_SIZE]);
# endif
# ifdef AES_XTS_ASM
void AES_xts_encrypt(const char *inp, char *out, size_t len,
                     const AES_KEY *key1, const AES_KEY *key2,
                     const unsigned char iv[16]);
void AES_xts_decrypt(const char *inp, char *out, size_t len,
                     const AES_KEY *key1, const AES_KEY *key2,
                     const unsigned char iv[16]);
# endif

# if     defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC))
#  include "ppc_arch.h"
#  ifdef VPAES_ASM
#   define VPAES_CAPABLE (OPENSSL_ppccap_P & PPC_ALTIVEC)
#  endif
#  define HWAES_CAPABLE  (OPENSSL_ppccap_P & PPC_CRYPTO207)
#  define HWAES_set_encrypt_key aes_p8_set_encrypt_key
#  define HWAES_set_decrypt_key aes_p8_set_decrypt_key
#  define HWAES_encrypt aes_p8_encrypt
#  define HWAES_decrypt aes_p8_decrypt
#  define HWAES_cbc_encrypt aes_p8_cbc_encrypt
#  define HWAES_ctr32_encrypt_blocks aes_p8_ctr32_encrypt_blocks
# endif

# if     defined(AES_ASM) && !defined(I386_ONLY) &&      (  \
        ((defined(__i386)       || defined(__i386__)    || \
          defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
        defined(__x86_64)       || defined(__x86_64__)  || \
        defined(_M_AMD64)       || defined(_M_X64)      || \
        defined(__INTEL__)                              )

extern unsigned int OPENSSL_ia32cap_P[];

#  ifdef VPAES_ASM
#   define VPAES_CAPABLE   (OPENSSL_ia32cap_P[1]&(1<<(41-32)))
#  endif
#  ifdef BSAES_ASM
#   define BSAES_CAPABLE   (OPENSSL_ia32cap_P[1]&(1<<(41-32)))
#  endif
/*
 * AES-NI section
 */
#  define AESNI_CAPABLE   (OPENSSL_ia32cap_P[1]&(1<<(57-32)))

int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
                          AES_KEY *key);
int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
                          AES_KEY *key);

void aesni_encrypt(const unsigned char *in, unsigned char *out,
                   const AES_KEY *key);
void aesni_decrypt(const unsigned char *in, unsigned char *out,
                   const AES_KEY *key);

void aesni_ecb_encrypt(const unsigned char *in,
                       unsigned char *out,
                       size_t length, const AES_KEY *key, int enc);
void aesni_cbc_encrypt(const unsigned char *in,
                       unsigned char *out,
                       size_t length,
                       const AES_KEY *key, unsigned char *ivec, int enc);

void aesni_ctr32_encrypt_blocks(const unsigned char *in,
                                unsigned char *out,
                                size_t blocks,
                                const void *key, const unsigned char *ivec);

void aesni_xts_encrypt(const unsigned char *in,
                       unsigned char *out,
                       size_t length,
                       const AES_KEY *key1, const AES_KEY *key2,
                       const unsigned char iv[16]);

void aesni_xts_decrypt(const unsigned char *in,
                       unsigned char *out,
                       size_t length,
                       const AES_KEY *key1, const AES_KEY *key2,
                       const unsigned char iv[16]);

void aesni_ccm64_encrypt_blocks(const unsigned char *in,
                                unsigned char *out,
                                size_t blocks,
                                const void *key,
                                const unsigned char ivec[16],
                                unsigned char cmac[16]);

void aesni_ccm64_decrypt_blocks(const unsigned char *in,
                                unsigned char *out,
                                size_t blocks,
                                const void *key,
                                const unsigned char ivec[16],
                                unsigned char cmac[16]);

#  if defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64)
size_t aesni_gcm_encrypt(const unsigned char *in,
                         unsigned char *out,
                         size_t len,
                         const void *key, unsigned char ivec[16], u64 *Xi);
#   define AES_gcm_encrypt aesni_gcm_encrypt
size_t aesni_gcm_decrypt(const unsigned char *in,
                         unsigned char *out,
                         size_t len,
                         const void *key, unsigned char ivec[16], u64 *Xi);
#   define AES_gcm_decrypt aesni_gcm_decrypt
void gcm_ghash_avx(u64 Xi[2], const u128 Htable[16], const u8 *in,
                   size_t len);
#   define AES_GCM_ASM(gctx)       (gctx->ctr==aesni_ctr32_encrypt_blocks && \
                                 gctx->gcm.ghash==gcm_ghash_avx)
#   define AES_GCM_ASM2(gctx)      (gctx->gcm.block==(block128_f)aesni_encrypt && \
                                 gctx->gcm.ghash==gcm_ghash_avx)
#   undef AES_GCM_ASM2          /* minor size optimization */
#  endif

static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                          const unsigned char *iv, int enc)
{
    int ret, mode;
    EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;

    mode = ctx->cipher->flags & EVP_CIPH_MODE;
    if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
        && !enc) {
        ret = aesni_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
        dat->block = (block128_f) aesni_decrypt;
        dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
            (cbc128_f) aesni_cbc_encrypt : NULL;
    } else {
        ret = aesni_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
        dat->block = (block128_f) aesni_encrypt;
        if (mode == EVP_CIPH_CBC_MODE)
            dat->stream.cbc = (cbc128_f) aesni_cbc_encrypt;
        else if (mode == EVP_CIPH_CTR_MODE)
            dat->stream.ctr = (ctr128_f) aesni_ctr32_encrypt_blocks;
        else
            dat->stream.cbc = NULL;
    }

    if (ret < 0) {
        EVPerr(EVP_F_AESNI_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED);
        return 0;
    }

    return 1;
}

static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
{
    aesni_cbc_encrypt(in, out, len, ctx->cipher_data, ctx->iv, ctx->encrypt);

    return 1;
}

static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
{
    size_t bl = ctx->cipher->block_size;

    if (len < bl)
        return 1;

    aesni_ecb_encrypt(in, out, len, ctx->cipher_data, ctx->encrypt);

    return 1;
}

#  define aesni_ofb_cipher aes_ofb_cipher
static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);

#  define aesni_cfb_cipher aes_cfb_cipher
static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);

#  define aesni_cfb8_cipher aes_cfb8_cipher
static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  define aesni_cfb1_cipher aes_cfb1_cipher
static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  define aesni_ctr_cipher aes_ctr_cipher
static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);

static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                              const unsigned char *iv, int enc)
{
    EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
    if (!iv && !key)
        return 1;
    if (key) {
        aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks);
        CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) aesni_encrypt);
        gctx->ctr = (ctr128_f) aesni_ctr32_encrypt_blocks;
        /*
         * If we have an iv can set it directly, otherwise use saved IV.
         */
        if (iv == NULL && gctx->iv_set)
            iv = gctx->iv;
        if (iv) {
            CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
            gctx->iv_set = 1;
        }
        gctx->key_set = 1;
    } else {
        /* If key set use IV, otherwise copy */
        if (gctx->key_set)
            CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
        else
            memcpy(gctx->iv, iv, gctx->ivlen);
        gctx->iv_set = 1;
        gctx->iv_gen = 0;
    }
    return 1;
}

#  define aesni_gcm_cipher aes_gcm_cipher
static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);

static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                              const unsigned char *iv, int enc)
{
    EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
    if (!iv && !key)
        return 1;

    if (key) {
        /* key_len is two AES keys */
        if (enc) {
            aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
            xctx->xts.block1 = (block128_f) aesni_encrypt;
            xctx->stream = aesni_xts_encrypt;
        } else {
            aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
            xctx->xts.block1 = (block128_f) aesni_decrypt;
            xctx->stream = aesni_xts_decrypt;
        }

        aesni_set_encrypt_key(key + ctx->key_len / 2,
                              ctx->key_len * 4, &xctx->ks2.ks);
        xctx->xts.block2 = (block128_f) aesni_encrypt;

        xctx->xts.key1 = &xctx->ks1;
    }

    if (iv) {
        xctx->xts.key2 = &xctx->ks2;
        memcpy(ctx->iv, iv, 16);
    }

    return 1;
}

#  define aesni_xts_cipher aes_xts_cipher
static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);

static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                              const unsigned char *iv, int enc)
{
    EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
    if (!iv && !key)
        return 1;
    if (key) {
        aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks.ks);
        CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
                           &cctx->ks, (block128_f) aesni_encrypt);
        cctx->str = enc ? (ccm128_f) aesni_ccm64_encrypt_blocks :
            (ccm128_f) aesni_ccm64_decrypt_blocks;
        cctx->key_set = 1;
    }
    if (iv) {
        memcpy(ctx->iv, iv, 15 - cctx->L);
        cctx->iv_set = 1;
    }
    return 1;
}

#  define aesni_ccm_cipher aes_ccm_cipher
static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);

#  ifndef OPENSSL_NO_OCB
static int aesni_ocb_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                              const unsigned char *iv, int enc)
{
    EVP_AES_OCB_CTX *octx = ctx->cipher_data;
    if (!iv && !key)
        return 1;
    if (key) {
        do {
            /*
             * We set both the encrypt and decrypt key here because decrypt
             * needs both. We could possibly optimise to remove setting the
             * decrypt for an encryption operation.
             */
            aesni_set_encrypt_key(key, ctx->key_len * 8, &octx->ksenc.ks);
            aesni_set_decrypt_key(key, ctx->key_len * 8, &octx->ksdec.ks);
            if (!CRYPTO_ocb128_init(&octx->ocb,
                                    &octx->ksenc.ks, &octx->ksdec.ks,
                                    (block128_f) aesni_encrypt,
                                    (block128_f) aesni_decrypt))
                return 0;
        }
        while (0);

        /*
         * If we have an iv we can set it directly, otherwise use saved IV.
         */
        if (iv == NULL && octx->iv_set)
            iv = octx->iv;
        if (iv) {
            if (CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen)
                != 1)
                return 0;
            octx->iv_set = 1;
        }
        octx->key_set = 1;
    } else {
        /* If key set use IV, otherwise copy */
        if (octx->key_set)
            CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen);
        else
            memcpy(octx->iv, iv, octx->ivlen);
        octx->iv_set = 1;
    }
    return 1;
}

#   define aesni_ocb_cipher aes_ocb_cipher
static int aesni_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len);
#  endif                        /* OPENSSL_NO_OCB */

#  define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER aesni_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aesni_init_key,                 \
        aesni_##mode##_cipher,          \
        NULL,                           \
        sizeof(EVP_AES_KEY),            \
        NULL,NULL,NULL,NULL }; \
static const EVP_CIPHER aes_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,     \
        keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_init_key,                   \
        aes_##mode##_cipher,            \
        NULL,                           \
        sizeof(EVP_AES_KEY),            \
        NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; }

#  define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
static const EVP_CIPHER aesni_##keylen##_##mode = { \
        nid##_##keylen##_##mode,blocksize, \
        (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aesni_##mode##_init_key,        \
        aesni_##mode##_cipher,          \
        aes_##mode##_cleanup,           \
        sizeof(EVP_AES_##MODE##_CTX),   \
        NULL,NULL,aes_##mode##_ctrl,NULL }; \
static const EVP_CIPHER aes_##keylen##_##mode = { \
        nid##_##keylen##_##mode,blocksize, \
        (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_##mode##_init_key,          \
        aes_##mode##_cipher,            \
        aes_##mode##_cleanup,           \
        sizeof(EVP_AES_##MODE##_CTX),   \
        NULL,NULL,aes_##mode##_ctrl,NULL }; \
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; }

# elif   defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))

#  include "sparc_arch.h"

extern unsigned int OPENSSL_sparcv9cap_P[];

#  define SPARC_AES_CAPABLE       (OPENSSL_sparcv9cap_P[1] & CFR_AES)

void aes_t4_set_encrypt_key(const unsigned char *key, int bits, AES_KEY *ks);
void aes_t4_set_decrypt_key(const unsigned char *key, int bits, AES_KEY *ks);
void aes_t4_encrypt(const unsigned char *in, unsigned char *out,
                    const AES_KEY *key);
void aes_t4_decrypt(const unsigned char *in, unsigned char *out,
                    const AES_KEY *key);
/*
 * Key-length specific subroutines were chosen for following reason.
 * Each SPARC T4 core can execute up to 8 threads which share core's
 * resources. Loading as much key material to registers allows to
 * minimize references to shared memory interface, as well as amount
 * of instructions in inner loops [much needed on T4]. But then having
 * non-key-length specific routines would require conditional branches
 * either in inner loops or on subroutines' entries. Former is hardly
 * acceptable, while latter means code size increase to size occupied
 * by multiple key-length specfic subroutines, so why fight?
 */
void aes128_t4_cbc_encrypt(const unsigned char *in, unsigned char *out,
                           size_t len, const AES_KEY *key,
                           unsigned char *ivec);
void aes128_t4_cbc_decrypt(const unsigned char *in, unsigned char *out,
                           size_t len, const AES_KEY *key,
                           unsigned char *ivec);
void aes192_t4_cbc_encrypt(const unsigned char *in, unsigned char *out,
                           size_t len, const AES_KEY *key,
                           unsigned char *ivec);
void aes192_t4_cbc_decrypt(const unsigned char *in, unsigned char *out,
                           size_t len, const AES_KEY *key,
                           unsigned char *ivec);
void aes256_t4_cbc_encrypt(const unsigned char *in, unsigned char *out,
                           size_t len, const AES_KEY *key,
                           unsigned char *ivec);
void aes256_t4_cbc_decrypt(const unsigned char *in, unsigned char *out,
                           size_t len, const AES_KEY *key,
                           unsigned char *ivec);
void aes128_t4_ctr32_encrypt(const unsigned char *in, unsigned char *out,
                             size_t blocks, const AES_KEY *key,
                             unsigned char *ivec);
void aes192_t4_ctr32_encrypt(const unsigned char *in, unsigned char *out,
                             size_t blocks, const AES_KEY *key,
                             unsigned char *ivec);
void aes256_t4_ctr32_encrypt(const unsigned char *in, unsigned char *out,
                             size_t blocks, const AES_KEY *key,
                             unsigned char *ivec);
void aes128_t4_xts_encrypt(const unsigned char *in, unsigned char *out,
                           size_t blocks, const AES_KEY *key1,
                           const AES_KEY *key2, const unsigned char *ivec);
void aes128_t4_xts_decrypt(const unsigned char *in, unsigned char *out,
                           size_t blocks, const AES_KEY *key1,
                           const AES_KEY *key2, const unsigned char *ivec);
void aes256_t4_xts_encrypt(const unsigned char *in, unsigned char *out,
                           size_t blocks, const AES_KEY *key1,
                           const AES_KEY *key2, const unsigned char *ivec);
void aes256_t4_xts_decrypt(const unsigned char *in, unsigned char *out,
                           size_t blocks, const AES_KEY *key1,
                           const AES_KEY *key2, const unsigned char *ivec);

static int aes_t4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                           const unsigned char *iv, int enc)
{
    int ret, mode, bits;
    EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;

    mode = ctx->cipher->flags & EVP_CIPH_MODE;
    bits = ctx->key_len * 8;
    if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
        && !enc) {
        ret = 0;
        aes_t4_set_decrypt_key(key, bits, ctx->cipher_data);
        dat->block = (block128_f) aes_t4_decrypt;
        switch (bits) {
        case 128:
            dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                (cbc128_f) aes128_t4_cbc_decrypt : NULL;
            break;
        case 192:
            dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                (cbc128_f) aes192_t4_cbc_decrypt : NULL;
            break;
        case 256:
            dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                (cbc128_f) aes256_t4_cbc_decrypt : NULL;
            break;
        default:
            ret = -1;
        }
    } else {
        ret = 0;
        aes_t4_set_encrypt_key(key, bits, ctx->cipher_data);
        dat->block = (block128_f) aes_t4_encrypt;
        switch (bits) {
        case 128:
            if (mode == EVP_CIPH_CBC_MODE)
                dat->stream.cbc = (cbc128_f) aes128_t4_cbc_encrypt;
            else if (mode == EVP_CIPH_CTR_MODE)
                dat->stream.ctr = (ctr128_f) aes128_t4_ctr32_encrypt;
            else
                dat->stream.cbc = NULL;
            break;
        case 192:
            if (mode == EVP_CIPH_CBC_MODE)
                dat->stream.cbc = (cbc128_f) aes192_t4_cbc_encrypt;
            else if (mode == EVP_CIPH_CTR_MODE)
                dat->stream.ctr = (ctr128_f) aes192_t4_ctr32_encrypt;
            else
                dat->stream.cbc = NULL;
            break;
        case 256:
            if (mode == EVP_CIPH_CBC_MODE)
                dat->stream.cbc = (cbc128_f) aes256_t4_cbc_encrypt;
            else if (mode == EVP_CIPH_CTR_MODE)
                dat->stream.ctr = (ctr128_f) aes256_t4_ctr32_encrypt;
            else
                dat->stream.cbc = NULL;
            break;
        default:
            ret = -1;
        }
    }

    if (ret < 0) {
        EVPerr(EVP_F_AES_T4_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED);
        return 0;
    }

    return 1;
}

#  define aes_t4_cbc_cipher aes_cbc_cipher
static int aes_t4_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  define aes_t4_ecb_cipher aes_ecb_cipher
static int aes_t4_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  define aes_t4_ofb_cipher aes_ofb_cipher
static int aes_t4_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  define aes_t4_cfb_cipher aes_cfb_cipher
static int aes_t4_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  define aes_t4_cfb8_cipher aes_cfb8_cipher
static int aes_t4_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

#  define aes_t4_cfb1_cipher aes_cfb1_cipher
static int aes_t4_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

#  define aes_t4_ctr_cipher aes_ctr_cipher
static int aes_t4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

static int aes_t4_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                               const unsigned char *iv, int enc)
{
    EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
    if (!iv && !key)
        return 1;
    if (key) {
        int bits = ctx->key_len * 8;
        aes_t4_set_encrypt_key(key, bits, &gctx->ks.ks);
        CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
                           (block128_f) aes_t4_encrypt);
        switch (bits) {
        case 128:
            gctx->ctr = (ctr128_f) aes128_t4_ctr32_encrypt;
            break;
        case 192:
            gctx->ctr = (ctr128_f) aes192_t4_ctr32_encrypt;
            break;
        case 256:
            gctx->ctr = (ctr128_f) aes256_t4_ctr32_encrypt;
            break;
        default:
            return 0;
        }
        /*
         * If we have an iv can set it directly, otherwise use saved IV.
         */
        if (iv == NULL && gctx->iv_set)
            iv = gctx->iv;
        if (iv) {
            CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
            gctx->iv_set = 1;
        }
        gctx->key_set = 1;
    } else {
        /* If key set use IV, otherwise copy */
        if (gctx->key_set)
            CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
        else
            memcpy(gctx->iv, iv, gctx->ivlen);
        gctx->iv_set = 1;
        gctx->iv_gen = 0;
    }
    return 1;
}

#  define aes_t4_gcm_cipher aes_gcm_cipher
static int aes_t4_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

static int aes_t4_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                               const unsigned char *iv, int enc)
{
    EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
    if (!iv && !key)
        return 1;

    if (key) {
        int bits = ctx->key_len * 4;
        xctx->stream = NULL;
        /* key_len is two AES keys */
        if (enc) {
            aes_t4_set_encrypt_key(key, bits, &xctx->ks1.ks);
            xctx->xts.block1 = (block128_f) aes_t4_encrypt;
            switch (bits) {
            case 128:
                xctx->stream = aes128_t4_xts_encrypt;
                break;
            case 256:
                xctx->stream = aes256_t4_xts_encrypt;
                break;
            default:
                return 0;
            }
        } else {
            aes_t4_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
            xctx->xts.block1 = (block128_f) aes_t4_decrypt;
            switch (bits) {
            case 128:
                xctx->stream = aes128_t4_xts_decrypt;
                break;
            case 256:
                xctx->stream = aes256_t4_xts_decrypt;
                break;
            default:
                return 0;
            }
        }

        aes_t4_set_encrypt_key(key + ctx->key_len / 2,
                               ctx->key_len * 4, &xctx->ks2.ks);
        xctx->xts.block2 = (block128_f) aes_t4_encrypt;

        xctx->xts.key1 = &xctx->ks1;
    }

    if (iv) {
        xctx->xts.key2 = &xctx->ks2;
        memcpy(ctx->iv, iv, 16);
    }

    return 1;
}

#  define aes_t4_xts_cipher aes_xts_cipher
static int aes_t4_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

static int aes_t4_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                               const unsigned char *iv, int enc)
{
    EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
    if (!iv && !key)
        return 1;
    if (key) {
        int bits = ctx->key_len * 8;
        aes_t4_set_encrypt_key(key, bits, &cctx->ks.ks);
        CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
                           &cctx->ks, (block128_f) aes_t4_encrypt);
        cctx->str = NULL;
        cctx->key_set = 1;
    }
    if (iv) {
        memcpy(ctx->iv, iv, 15 - cctx->L);
        cctx->iv_set = 1;
    }
    return 1;
}

#  define aes_t4_ccm_cipher aes_ccm_cipher
static int aes_t4_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);

#  ifndef OPENSSL_NO_OCB
static int aes_t4_ocb_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                               const unsigned char *iv, int enc)
{
    EVP_AES_OCB_CTX *octx = ctx->cipher_data;
    if (!iv && !key)
        return 1;
    if (key) {
        do {
            /*
             * We set both the encrypt and decrypt key here because decrypt
             * needs both. We could possibly optimise to remove setting the
             * decrypt for an encryption operation.
             */
            aes_t4_set_encrypt_key(key, ctx->key_len * 8, &octx->ksenc.ks);
            aes_t4_set_decrypt_key(key, ctx->key_len * 8, &octx->ksdec.ks);
            if (!CRYPTO_ocb128_init(&octx->ocb,
                                    &octx->ksenc.ks, &octx->ksdec.ks,
                                    (block128_f) aes_t4_encrypt,
                                    (block128_f) aes_t4_decrypt))
                return 0;
        }
        while (0);

        /*
         * If we have an iv we can set it directly, otherwise use saved IV.
         */
        if (iv == NULL && octx->iv_set)
            iv = octx->iv;
        if (iv) {
            if (CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen)
                != 1)
                return 0;
            octx->iv_set = 1;
        }
        octx->key_set = 1;
    } else {
        /* If key set use IV, otherwise copy */
        if (octx->key_set)
            CRYPTO_ocb128_setiv(&octx->ocb, iv, octx->ivlen, octx->taglen);
        else
            memcpy(octx->iv, iv, octx->ivlen);
        octx->iv_set = 1;
    }
    return 1;
}

#   define aes_t4_ocb_cipher aes_ocb_cipher
static int aes_t4_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len);
#  endif                        /* OPENSSL_NO_OCB */

#  define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER aes_t4_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_t4_init_key,                \
        aes_t4_##mode##_cipher,         \
        NULL,                           \
        sizeof(EVP_AES_KEY),            \
        NULL,NULL,NULL,NULL }; \
static const EVP_CIPHER aes_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,     \
        keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_init_key,                   \
        aes_##mode##_cipher,            \
        NULL,                           \
        sizeof(EVP_AES_KEY),            \
        NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
{ return SPARC_AES_CAPABLE?&aes_t4_##keylen##_##mode:&aes_##keylen##_##mode; }

#  define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
static const EVP_CIPHER aes_t4_##keylen##_##mode = { \
        nid##_##keylen##_##mode,blocksize, \
        (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_t4_##mode##_init_key,       \
        aes_t4_##mode##_cipher,         \
        aes_##mode##_cleanup,           \
        sizeof(EVP_AES_##MODE##_CTX),   \
        NULL,NULL,aes_##mode##_ctrl,NULL }; \
static const EVP_CIPHER aes_##keylen##_##mode = { \
        nid##_##keylen##_##mode,blocksize, \
        (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_##mode##_init_key,          \
        aes_##mode##_cipher,            \
        aes_##mode##_cleanup,           \
        sizeof(EVP_AES_##MODE##_CTX),   \
        NULL,NULL,aes_##mode##_ctrl,NULL }; \
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
{ return SPARC_AES_CAPABLE?&aes_t4_##keylen##_##mode:&aes_##keylen##_##mode; }

# else

#  define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER aes_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_init_key,                   \
        aes_##mode##_cipher,            \
        NULL,                           \
        sizeof(EVP_AES_KEY),            \
        NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
{ return &aes_##keylen##_##mode; }

#  define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
static const EVP_CIPHER aes_##keylen##_##mode = { \
        nid##_##keylen##_##mode,blocksize, \
        (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        aes_##mode##_init_key,          \
        aes_##mode##_cipher,            \
        aes_##mode##_cleanup,           \
        sizeof(EVP_AES_##MODE##_CTX),   \
        NULL,NULL,aes_##mode##_ctrl,NULL }; \
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
{ return &aes_##keylen##_##mode; }

# endif

# if defined(OPENSSL_CPUID_OBJ) && (defined(__arm__) || defined(__arm) || defined(__aarch64__))
#  include "arm_arch.h"
#  if __ARM_MAX_ARCH__>=7
#   if defined(BSAES_ASM)
#    define BSAES_CAPABLE (OPENSSL_armcap_P & ARMV7_NEON)
#   endif
#   if defined(VPAES_ASM)
#    define VPAES_CAPABLE (OPENSSL_armcap_P & ARMV7_NEON)
#   endif
#   define HWAES_CAPABLE (OPENSSL_armcap_P & ARMV8_AES)
#   define HWAES_set_encrypt_key aes_v8_set_encrypt_key
#   define HWAES_set_decrypt_key aes_v8_set_decrypt_key
#   define HWAES_encrypt aes_v8_encrypt
#   define HWAES_decrypt aes_v8_decrypt
#   define HWAES_cbc_encrypt aes_v8_cbc_encrypt
#   define HWAES_ctr32_encrypt_blocks aes_v8_ctr32_encrypt_blocks
#  endif
# endif

# if defined(HWAES_CAPABLE)
int HWAES_set_encrypt_key(const unsigned char *userKey, const int bits,
                          AES_KEY *key);
int HWAES_set_decrypt_key(const unsigned char *userKey, const int bits,
                          AES_KEY *key);