text: /* ====================================================================
   * Copyright (c) 2001-2011 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/crypto.h>
  # 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>
  
  # undef EVP_CIPH_FLAG_FIPS
  # define EVP_CIPH_FLAG_FIPS 0
  
  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;
  
  # 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 unsigned char *inp, unsigned char *out, size_t len,
                       const AES_KEY *key1, const AES_KEY *key2,
                       const unsigned char iv[16]);
  void AES_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
  
  # 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);
  
  #  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;
  #  if 0                         /* not yet */
              case 192:
                  xctx->stream = aes192_t4_xts_encrypt;
                  break;
  #  endif
              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;
  #  if 0                         /* not yet */
              case 192:
                  xctx->stream = aes192_t4_xts_decrypt;
                  break;
  #  endif
              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);
  #  if 0                         /* not yet */
          switch (bits) {
          case 128:
              cctx->str = enc ? (ccm128_f) aes128_t4_ccm64_encrypt :
                  (ccm128_f) ae128_t4_ccm64_decrypt;
              break;
          case 192:
              cctx->str = enc ? (ccm128_f) aes192_t4_ccm64_encrypt :
                  (ccm128_f) ae192_t4_ccm64_decrypt;
              break;
          case 256:
              cctx->str = enc ? (ccm128_f) aes256_t4_ccm64_encrypt :
                  (ccm128_f) ae256_t4_ccm64_decrypt;
              break;
          default:
              return 0;
          }
  #  else
          cctx->str = NULL;
  #  endif
          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);
  
  #  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
  #   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);
  void HWAES_encrypt(const unsigned char *in, unsigned char *out,
                     const AES_KEY *key);
  void HWAES_decrypt(const unsigned char *in, unsigned char *out,
                     const AES_KEY *key);
  void HWAES_cbc_encrypt(const unsigned char *in, unsigned char *out,
                         size_t length, const AES_KEY *key,
                         unsigned char *ivec, const int enc);
  void HWAES_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
                                  size_t len, const AES_KEY *key,
                                  const unsigned char ivec[16]);
  # endif
  
  # define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
          BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
          BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
          BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
          BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
          BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
          BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
          BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
  
  static int aes_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)
  # ifdef HWAES_CAPABLE
          if (HWAES_CAPABLE) {
              ret = HWAES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
              dat->block = (block128_f) HWAES_decrypt;
              dat->stream.cbc = NULL;
  #  ifdef HWAES_cbc_encrypt
              if (mode == EVP_CIPH_CBC_MODE)
                  dat->stream.cbc = (cbc128_f) HWAES_cbc_encrypt;
  #  endif
          } else
  # endif
  # ifdef BSAES_CAPABLE
          if (BSAES_CAPABLE && mode == EVP_CIPH_CBC_MODE) {
              ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
              dat->block = (block128_f) AES_decrypt;
              dat->stream.cbc = (cbc128_f) bsaes_cbc_encrypt;
          } else
  # endif
  # ifdef VPAES_CAPABLE
          if (VPAES_CAPABLE) {
              ret = vpaes_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
              dat->block = (block128_f) vpaes_decrypt;
              dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                  (cbc128_f) vpaes_cbc_encrypt : NULL;
          } else
  # endif
          {
              ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
              dat->block = (block128_f) AES_decrypt;
              dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                  (cbc128_f) AES_cbc_encrypt : NULL;
      } else
  # ifdef HWAES_CAPABLE
      if (HWAES_CAPABLE) {
          ret = HWAES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
          dat->block = (block128_f) HWAES_encrypt;
          dat->stream.cbc = NULL;
  #  ifdef HWAES_cbc_encrypt
          if (mode == EVP_CIPH_CBC_MODE)
              dat->stream.cbc = (cbc128_f) HWAES_cbc_encrypt;
          else
  #  endif
  #  ifdef HWAES_ctr32_encrypt_blocks
          if (mode == EVP_CIPH_CTR_MODE)
              dat->stream.ctr = (ctr128_f) HWAES_ctr32_encrypt_blocks;
          else
  #  endif
              (void)0;            /* terminate potentially open 'else' */
      } else
  # endif
  # ifdef BSAES_CAPABLE
      if (BSAES_CAPABLE && mode == EVP_CIPH_CTR_MODE) {
          ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
          dat->block = (block128_f) AES_encrypt;
          dat->stream.ctr = (ctr128_f) bsaes_ctr32_encrypt_blocks;
      } else
  # endif
  # ifdef VPAES_CAPABLE
      if (VPAES_CAPABLE) {
          ret = vpaes_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
          dat->block = (block128_f) vpaes_encrypt;
          dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
              (cbc128_f) vpaes_cbc_encrypt : NULL;
      } else
  # endif
      {
          ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
          dat->block = (block128_f) AES_encrypt;
          dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
              (cbc128_f) AES_cbc_encrypt : NULL;
  # ifdef AES_CTR_ASM
          if (mode == EVP_CIPH_CTR_MODE)
              dat->stream.ctr = (ctr128_f) AES_ctr32_encrypt;
  # endif
      }
  
      if (ret < 0) {
          EVPerr(EVP_F_AES_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED);
          return 0;
      }
  
      return 1;
  }
  
  static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      if (dat->stream.cbc)
          (*dat->stream.cbc) (in, out, len, &dat->ks, ctx->iv, ctx->encrypt);
      else if (ctx->encrypt)
          CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv, dat->block);
      else
          CRYPTO_cbc128_decrypt(in, out, len, &dat->ks, ctx->iv, dat->block);
  
      return 1;
  }
  
  static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      size_t bl = ctx->cipher->block_size;
      size_t i;
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      if (len < bl)
          return 1;
  
      for (i = 0, len -= bl; i <= len; i += bl)
          (*dat->block) (in + i, out + i, &dat->ks);
  
      return 1;
  }
  
  static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      CRYPTO_ofb128_encrypt(in, out, len, &dat->ks,
                            ctx->iv, &ctx->num, dat->block);
      return 1;
  }
  
  static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      CRYPTO_cfb128_encrypt(in, out, len, &dat->ks,
                            ctx->iv, &ctx->num, ctx->encrypt, dat->block);
      return 1;
  }
  
  static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len)
  {
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks,
                              ctx->iv, &ctx->num, ctx->encrypt, dat->block);
      return 1;
  }
  
  static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t len)
  {
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      if (ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) {
          CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks,
                                  ctx->iv, &ctx->num, ctx->encrypt, dat->block);
          return 1;
      }
  
      while (len >= MAXBITCHUNK) {
          CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
                                  ctx->iv, &ctx->num, ctx->encrypt, dat->block);
          len -= MAXBITCHUNK;
      }
      if (len)
          CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks,
                                  ctx->iv, &ctx->num, ctx->encrypt, dat->block);
  
      return 1;
  }
  
  static int aes_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      unsigned int num = ctx->num;
      EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data;
  
      if (dat->stream.ctr)
          CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
                                      ctx->iv, ctx->buf, &num, dat->stream.ctr);
      else
          CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
                                ctx->iv, ctx->buf, &num, dat->block);
      ctx->num = (size_t)num;
      return 1;
  }
  
  BLOCK_CIPHER_generic_pack(NID_aes, 128, EVP_CIPH_FLAG_FIPS)
      BLOCK_CIPHER_generic_pack(NID_aes, 192, EVP_CIPH_FLAG_FIPS)
      BLOCK_CIPHER_generic_pack(NID_aes, 256, EVP_CIPH_FLAG_FIPS)
  
  static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
  {
      EVP_AES_GCM_CTX *gctx = c->cipher_data;
      OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
      if (gctx->iv != c->iv)
          OPENSSL_free(gctx->iv);
      return 1;
  }
  
  /* increment counter (64-bit int) by 1 */
  static void ctr64_inc(unsigned char *counter)
  {
      int n = 8;
      unsigned char c;
  
      do {
          --n;
          c = counter[n];
          ++c;
          counter[n] = c;
          if (c)
              return;
      } while (n);
  }
  
  static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
  {
      EVP_AES_GCM_CTX *gctx = c->cipher_data;
      switch (type) {
      case EVP_CTRL_INIT:
          gctx->key_set = 0;
          gctx->iv_set = 0;
          gctx->ivlen = c->cipher->iv_len;
          gctx->iv = c->iv;
          gctx->taglen = -1;
          gctx->iv_gen = 0;
          gctx->tls_aad_len = -1;
          return 1;
  
      case EVP_CTRL_GCM_SET_IVLEN:
          if (arg <= 0)
              return 0;
          /* Allocate memory for IV if needed */
          if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
              if (gctx->iv != c->iv)
                  OPENSSL_free(gctx->iv);
              gctx->iv = OPENSSL_malloc(arg);
              if (!gctx->iv)
                  return 0;
          }
          gctx->ivlen = arg;
          return 1;
  
      case EVP_CTRL_GCM_SET_TAG:
          if (arg <= 0 || arg > 16 || c->encrypt)
              return 0;
          memcpy(c->buf, ptr, arg);
          gctx->taglen = arg;
          return 1;
  
      case EVP_CTRL_GCM_GET_TAG:
          if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
              return 0;
          memcpy(ptr, c->buf, arg);
          return 1;
  
      case EVP_CTRL_GCM_SET_IV_FIXED:
          /* Special case: -1 length restores whole IV */
          if (arg == -1) {
              memcpy(gctx->iv, ptr, gctx->ivlen);
              gctx->iv_gen = 1;
              return 1;
          }
          /*
           * Fixed field must be at least 4 bytes and invocation field at least
           * 8.
           */
          if ((arg < 4) || (gctx->ivlen - arg) < 8)
              return 0;
          if (arg)
              memcpy(gctx->iv, ptr, arg);
          if (c->encrypt && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
              return 0;
          gctx->iv_gen = 1;
          return 1;
  
      case EVP_CTRL_GCM_IV_GEN:
          if (gctx->iv_gen == 0 || gctx->key_set == 0)
              return 0;
          CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
          if (arg <= 0 || arg > gctx->ivlen)
              arg = gctx->ivlen;
          memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
          /*
           * Invocation field will be at least 8 bytes in size and so no need
           * to check wrap around or increment more than last 8 bytes.
           */
          ctr64_inc(gctx->iv + gctx->ivlen - 8);
          gctx->iv_set = 1;
          return 1;
  
      case EVP_CTRL_GCM_SET_IV_INV:
          if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
              return 0;
          memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
          CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
          gctx->iv_set = 1;
          return 1;
  
      case EVP_CTRL_AEAD_TLS1_AAD:
          /* Save the AAD for later use */
          if (arg != EVP_AEAD_TLS1_AAD_LEN)
              return 0;
          memcpy(c->buf, ptr, arg);
          gctx->tls_aad_len = arg;
          {
              unsigned int len = c->buf[arg - 2] << 8 | c->buf[arg - 1];
              /* Correct length for explicit IV */
              len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
              /* If decrypting correct for tag too */
              if (!c->encrypt)
                  len -= EVP_GCM_TLS_TAG_LEN;
              c->buf[arg - 2] = len >> 8;
              c->buf[arg - 1] = len & 0xff;
          }
          /* Extra padding: tag appended to record */
          return EVP_GCM_TLS_TAG_LEN;
  
      case EVP_CTRL_COPY:
          {
              EVP_CIPHER_CTX *out = ptr;
              EVP_AES_GCM_CTX *gctx_out = out->cipher_data;
              if (gctx->gcm.key) {
                  if (gctx->gcm.key != &gctx->ks)
                      return 0;
                  gctx_out->gcm.key = &gctx_out->ks;
              }
              if (gctx->iv == c->iv)
                  gctx_out->iv = out->iv;
              else {
                  gctx_out->iv = OPENSSL_malloc(gctx->ivlen);
                  if (!gctx_out->iv)
                      return 0;
                  memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
              }
              return 1;
          }
  
      default:
          return -1;
  
      }
  }
  
  static ctr128_f aes_gcm_set_key(AES_KEY *aes_key, GCM128_CONTEXT *gcm_ctx,
                                  const unsigned char *key, size_t key_len)
  {
  # ifdef HWAES_CAPABLE
    if (HWAES_CAPABLE) {
        HWAES_set_encrypt_key(key, key_len * 8, aes_key);
        CRYPTO_gcm128_init(gcm_ctx, aes_key,
                           (block128_f) HWAES_encrypt);
  #  ifdef HWAES_ctr32_encrypt_blocks
                  return (ctr128_f) HWAES_ctr32_encrypt_blocks;
  #  else
                  return NULL;
  #  endif
    } else
  # endif
  # ifdef BSAES_CAPABLE
      if (BSAES_CAPABLE) {
          AES_set_encrypt_key(key, key_len * 8, aes_key);
          CRYPTO_gcm128_init(gcm_ctx, aes_key,
                             (block128_f) AES_encrypt);
          return (ctr128_f) bsaes_ctr32_encrypt_blocks;
      }
  # endif
  # ifdef VPAES_CAPABLE
      if (VPAES_CAPABLE) {
          vpaes_set_encrypt_key(key, key_len * 8, aes_key);
          CRYPTO_gcm128_init(gcm_ctx, aes_key,
                             (block128_f)vpaes_encrypt);
          return NULL;
      } else
  # endif
          (void)0;	/* terminate potentially open 'else' */
  
      AES_set_encrypt_key(key, key_len * 8, aes_key);
      CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f) AES_encrypt);
  # ifdef AES_CTR_ASM
      return (ctr128_f) AES_ctr32_encrypt;
  # else
      return NULL;
  # endif
  }
  
  static int aes_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) {
          gctx->ctr = aes_gcm_set_key(&gctx->ks, &gctx->gcm, key, ctx->key_len);
          /*
           * 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;
  }
  
  /*
   * Handle TLS GCM packet format. This consists of the last portion of the IV
   * followed by the payload and finally the tag. On encrypt generate IV,
   * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
   * and verify tag.
   */
  
  static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                const unsigned char *in, size_t len)
  {
      EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
      int rv = -1;
      /* Encrypt/decrypt must be performed in place */
      if (out != in
          || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
          return -1;
      /*
       * Set IV from start of buffer or generate IV and write to start of
       * buffer.
       */
      if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
                              EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
                              EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
          goto err;
      /* Use saved AAD */
      if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
          goto err;
      /* Fix buffer and length to point to payload */
      in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
      out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
      len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
      if (ctx->encrypt) {
          /* Encrypt payload */
          if (gctx->ctr) {
              size_t bulk = 0;
  # if defined(AES_GCM_ASM)
              if (len >= 32 && AES_GCM_ASM(gctx)) {
                  if (CRYPTO_gcm128_encrypt(&gctx->gcm, NULL, NULL, 0))
                      return -1;
  
                  bulk = AES_gcm_encrypt(in, out, len,
                                         gctx->gcm.key,
                                         gctx->gcm.Yi.c, gctx->gcm.Xi.u);
                  gctx->gcm.len.u[1] += bulk;
              }
  # endif
              if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
                                              in + bulk,
                                              out + bulk,
                                              len - bulk, gctx->ctr))
                  goto err;
          } else {
              size_t bulk = 0;
  # if defined(AES_GCM_ASM2)
              if (len >= 32 && AES_GCM_ASM2(gctx)) {
                  if (CRYPTO_gcm128_encrypt(&gctx->gcm, NULL, NULL, 0))
                      return -1;
  
                  bulk = AES_gcm_encrypt(in, out, len,
                                         gctx->gcm.key,
                                         gctx->gcm.Yi.c, gctx->gcm.Xi.u);
                  gctx->gcm.len.u[1] += bulk;
              }
  # endif
              if (CRYPTO_gcm128_encrypt(&gctx->gcm,
                                        in + bulk, out + bulk, len - bulk))
                  goto err;
          }
          out += len;
          /* Finally write tag */
          CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
          rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
      } else {
          /* Decrypt */
          if (gctx->ctr) {
              size_t bulk = 0;
  # if defined(AES_GCM_ASM)
              if (len >= 16 && AES_GCM_ASM(gctx)) {
                  if (CRYPTO_gcm128_decrypt(&gctx->gcm, NULL, NULL, 0))
                      return -1;
  
                  bulk = AES_gcm_decrypt(in, out, len,
                                         gctx->gcm.key,
                                         gctx->gcm.Yi.c, gctx->gcm.Xi.u);
                  gctx->gcm.len.u[1] += bulk;
              }
  # endif
              if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
                                              in + bulk,
                                              out + bulk,
                                              len - bulk, gctx->ctr))
                  goto err;
          } else {
              size_t bulk = 0;
  # if defined(AES_GCM_ASM2)
              if (len >= 16 && AES_GCM_ASM2(gctx)) {
                  if (CRYPTO_gcm128_decrypt(&gctx->gcm, NULL, NULL, 0))
                      return -1;
  
                  bulk = AES_gcm_decrypt(in, out, len,
                                         gctx->gcm.key,
                                         gctx->gcm.Yi.c, gctx->gcm.Xi.u);
                  gctx->gcm.len.u[1] += bulk;
              }
  # endif
              if (CRYPTO_gcm128_decrypt(&gctx->gcm,
                                        in + bulk, out + bulk, len - bulk))
                  goto err;
          }
          /* Retrieve tag */
          CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN);
          /* If tag mismatch wipe buffer */
          if (CRYPTO_memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) {
              OPENSSL_cleanse(out, len);
              goto err;
          }
          rv = len;
      }
  
   err:
      gctx->iv_set = 0;
      gctx->tls_aad_len = -1;
      return rv;
  }
  
  static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
      /* If not set up, return error */
      if (!gctx->key_set)
          return -1;
  
      if (gctx->tls_aad_len >= 0)
          return aes_gcm_tls_cipher(ctx, out, in, len);
  
      if (!gctx->iv_set)
          return -1;
      if (in) {
          if (out == NULL) {
              if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
                  return -1;
          } else if (ctx->encrypt) {
              if (gctx->ctr) {
                  size_t bulk = 0;
  # if defined(AES_GCM_ASM)
                  if (len >= 32 && AES_GCM_ASM(gctx)) {
                      size_t res = (16 - gctx->gcm.mres) % 16;
  
                      if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, res))
                          return -1;
  
                      bulk = AES_gcm_encrypt(in + res,
                                             out + res, len - res,
                                             gctx->gcm.key, gctx->gcm.Yi.c,
                                             gctx->gcm.Xi.u);
                      gctx->gcm.len.u[1] += bulk;
                      bulk += res;
                  }
  # endif
                  if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
                                                  in + bulk,
                                                  out + bulk,
                                                  len - bulk, gctx->ctr))
                      return -1;
              } else {
                  size_t bulk = 0;
  # if defined(AES_GCM_ASM2)
                  if (len >= 32 && AES_GCM_ASM2(gctx)) {
                      size_t res = (16 - gctx->gcm.mres) % 16;
  
                      if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, res))
                          return -1;
  
                      bulk = AES_gcm_encrypt(in + res,
                                             out + res, len - res,
                                             gctx->gcm.key, gctx->gcm.Yi.c,
                                             gctx->gcm.Xi.u);
                      gctx->gcm.len.u[1] += bulk;
                      bulk += res;
                  }
  # endif
                  if (CRYPTO_gcm128_encrypt(&gctx->gcm,
                                            in + bulk, out + bulk, len - bulk))
                      return -1;
              }
          } else {
              if (gctx->ctr) {
                  size_t bulk = 0;
  # if defined(AES_GCM_ASM)
                  if (len >= 16 && AES_GCM_ASM(gctx)) {
                      size_t res = (16 - gctx->gcm.mres) % 16;
  
                      if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, res))
                          return -1;
  
                      bulk = AES_gcm_decrypt(in + res,
                                             out + res, len - res,
                                             gctx->gcm.key,
                                             gctx->gcm.Yi.c, gctx->gcm.Xi.u);
                      gctx->gcm.len.u[1] += bulk;
                      bulk += res;
                  }
  # endif
                  if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
                                                  in + bulk,
                                                  out + bulk,
                                                  len - bulk, gctx->ctr))
                      return -1;
              } else {
                  size_t bulk = 0;
  # if defined(AES_GCM_ASM2)
                  if (len >= 16 && AES_GCM_ASM2(gctx)) {
                      size_t res = (16 - gctx->gcm.mres) % 16;
  
                      if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, res))
                          return -1;
  
                      bulk = AES_gcm_decrypt(in + res,
                                             out + res, len - res,
                                             gctx->gcm.key,
                                             gctx->gcm.Yi.c, gctx->gcm.Xi.u);
                      gctx->gcm.len.u[1] += bulk;
                      bulk += res;
                  }
  # endif
                  if (CRYPTO_gcm128_decrypt(&gctx->gcm,
                                            in + bulk, out + bulk, len - bulk))
                      return -1;
              }
          }
          return len;
      } else {
          if (!ctx->encrypt) {
              if (gctx->taglen < 0)
                  return -1;
              if (CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf, gctx->taglen) != 0)
                  return -1;
              gctx->iv_set = 0;
              return 0;
          }
          CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
          gctx->taglen = 16;
          /* Don't reuse the IV */
          gctx->iv_set = 0;
          return 0;
      }
  
  }
  
  # define CUSTOM_FLAGS    (EVP_CIPH_FLAG_DEFAULT_ASN1 \
                  | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
                  | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
                  | EVP_CIPH_CUSTOM_COPY)
  
  BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, gcm, GCM,
                      EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER |
                      CUSTOM_FLAGS)
      BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, gcm, GCM,
                      EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER |
                      CUSTOM_FLAGS)
      BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, gcm, GCM,
                      EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER |
                      CUSTOM_FLAGS)
  
  static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
  {
      EVP_AES_XTS_CTX *xctx = c->cipher_data;
      if (type == EVP_CTRL_COPY) {
          EVP_CIPHER_CTX *out = ptr;
          EVP_AES_XTS_CTX *xctx_out = out->cipher_data;
          if (xctx->xts.key1) {
              if (xctx->xts.key1 != &xctx->ks1)
                  return 0;
              xctx_out->xts.key1 = &xctx_out->ks1;
          }
          if (xctx->xts.key2) {
              if (xctx->xts.key2 != &xctx->ks2)
                  return 0;
              xctx_out->xts.key2 = &xctx_out->ks2;
          }
          return 1;
      } else if (type != EVP_CTRL_INIT)
          return -1;
      /* key1 and key2 are used as an indicator both key and IV are set */
      xctx->xts.key1 = NULL;
      xctx->xts.key2 = NULL;
      return 1;
  }
  
  static int aes_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)
          do {
  # ifdef AES_XTS_ASM
              xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt;
  # else
              xctx->stream = NULL;
  # endif
              /* key_len is two AES keys */
  # ifdef HWAES_CAPABLE
              if (HWAES_CAPABLE) {
                  if (enc) {
                      HWAES_set_encrypt_key(key, ctx->key_len * 4,
                                            &xctx->ks1.ks);
                      xctx->xts.block1 = (block128_f) HWAES_encrypt;
                  } else {
                      HWAES_set_decrypt_key(key, ctx->key_len * 4,
                                            &xctx->ks1.ks);
                      xctx->xts.block1 = (block128_f) HWAES_decrypt;
                  }
  
                  HWAES_set_encrypt_key(key + ctx->key_len / 2,
                                        ctx->key_len * 4, &xctx->ks2.ks);
                  xctx->xts.block2 = (block128_f) HWAES_encrypt;
  
                  xctx->xts.key1 = &xctx->ks1;
                  break;
              } else
  # endif
  # ifdef BSAES_CAPABLE
              if (BSAES_CAPABLE)
                  xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt;
              else
  # endif
  # ifdef VPAES_CAPABLE
              if (VPAES_CAPABLE) {
                  if (enc) {
                      vpaes_set_encrypt_key(key, ctx->key_len * 4,
                                            &xctx->ks1.ks);
                      xctx->xts.block1 = (block128_f) vpaes_encrypt;
                  } else {
                      vpaes_set_decrypt_key(key, ctx->key_len * 4,
                                            &xctx->ks1.ks);
                      xctx->xts.block1 = (block128_f) vpaes_decrypt;
                  }
  
                  vpaes_set_encrypt_key(key + ctx->key_len / 2,
                                        ctx->key_len * 4, &xctx->ks2.ks);
                  xctx->xts.block2 = (block128_f) vpaes_encrypt;
  
                  xctx->xts.key1 = &xctx->ks1;
                  break;
              } else
  # endif
                  (void)0;        /* terminate potentially open 'else' */
  
              if (enc) {
                  AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
                  xctx->xts.block1 = (block128_f) AES_encrypt;
              } else {
                  AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1.ks);
                  xctx->xts.block1 = (block128_f) AES_decrypt;
              }
  
              AES_set_encrypt_key(key + ctx->key_len / 2,
                                  ctx->key_len * 4, &xctx->ks2.ks);
              xctx->xts.block2 = (block128_f) AES_encrypt;
  
              xctx->xts.key1 = &xctx->ks1;
          } while (0);
  
      if (iv) {
          xctx->xts.key2 = &xctx->ks2;
          memcpy(ctx->iv, iv, 16);
      }
  
      return 1;
  }
  
  static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
      if (!xctx->xts.key1 || !xctx->xts.key2)
          return 0;
      if (!out || !in || len < AES_BLOCK_SIZE)
          return 0;
      if (xctx->stream)
          (*xctx->stream) (in, out, len,
                           xctx->xts.key1, xctx->xts.key2, ctx->iv);
      else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
                                     ctx->encrypt))
          return 0;
      return 1;
  }
  
  # define aes_xts_cleanup NULL
  
  # define XTS_FLAGS       (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \
                           | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
                           | EVP_CIPH_CUSTOM_COPY)
  
  BLOCK_CIPHER_custom(NID_aes, 128, 1, 16, xts, XTS,
                      EVP_CIPH_FLAG_FIPS | XTS_FLAGS)
      BLOCK_CIPHER_custom(NID_aes, 256, 1, 16, xts, XTS,
                      EVP_CIPH_FLAG_FIPS | XTS_FLAGS)
  
  static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
  {
      EVP_AES_CCM_CTX *cctx = c->cipher_data;
      switch (type) {
      case EVP_CTRL_INIT:
          cctx->key_set = 0;
          cctx->iv_set = 0;
          cctx->L = 8;
          cctx->M = 12;
          cctx->tag_set = 0;
          cctx->len_set = 0;
          return 1;
  
      case EVP_CTRL_CCM_SET_IVLEN:
          arg = 15 - arg;
      case EVP_CTRL_CCM_SET_L:
          if (arg < 2 || arg > 8)
              return 0;
          cctx->L = arg;
          return 1;
  
      case EVP_CTRL_CCM_SET_TAG:
          if ((arg & 1) || arg < 4 || arg > 16)
              return 0;
          if (c->encrypt && ptr)
              return 0;
          if (ptr) {
              cctx->tag_set = 1;
              memcpy(c->buf, ptr, arg);
          }
          cctx->M = arg;
          return 1;
  
      case EVP_CTRL_CCM_GET_TAG:
          if (!c->encrypt || !cctx->tag_set)
              return 0;
          if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
              return 0;
          cctx->tag_set = 0;
          cctx->iv_set = 0;
          cctx->len_set = 0;
          return 1;
  
      case EVP_CTRL_COPY:
          {
              EVP_CIPHER_CTX *out = ptr;
              EVP_AES_CCM_CTX *cctx_out = out->cipher_data;
              if (cctx->ccm.key) {
                  if (cctx->ccm.key != &cctx->ks)
                      return 0;
                  cctx_out->ccm.key = &cctx_out->ks;
              }
              return 1;
          }
  
      default:
          return -1;
  
      }
  }
  
  static int aes_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)
          do {
  # ifdef HWAES_CAPABLE
              if (HWAES_CAPABLE) {
                  HWAES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks.ks);
  
                  CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
                                     &cctx->ks, (block128_f) HWAES_encrypt);
                  cctx->str = NULL;
                  cctx->key_set = 1;
                  break;
              } else
  # endif
  # ifdef VPAES_CAPABLE
              if (VPAES_CAPABLE) {
                  vpaes_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks.ks);
                  CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
                                     &cctx->ks, (block128_f) vpaes_encrypt);
                  cctx->str = NULL;
                  cctx->key_set = 1;
                  break;
              }
  # endif
              AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks.ks);
              CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
                                 &cctx->ks, (block128_f) AES_encrypt);
              cctx->str = NULL;
              cctx->key_set = 1;
          } while (0);
      if (iv) {
          memcpy(ctx->iv, iv, 15 - cctx->L);
          cctx->iv_set = 1;
      }
      return 1;
  }
  
  static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t len)
  {
      EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
      CCM128_CONTEXT *ccm = &cctx->ccm;
      /* If not set up, return error */
      if (!cctx->iv_set && !cctx->key_set)
          return -1;
      if (!ctx->encrypt && !cctx->tag_set)
          return -1;
      if (!out) {
          if (!in) {
              if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
                  return -1;
              cctx->len_set = 1;
              return len;
          }
          /* If have AAD need message length */
          if (!cctx->len_set && len)
              return -1;
          CRYPTO_ccm128_aad(ccm, in, len);
          return len;
      }
      /* EVP_*Final() doesn't return any data */
      if (!in)
          return 0;
      /* If not set length yet do it */
      if (!cctx->len_set) {
          if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
              return -1;
          cctx->len_set = 1;
      }
      if (ctx->encrypt) {
          if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
                                                      cctx->str) :
              CRYPTO_ccm128_encrypt(ccm, in, out, len))
              return -1;
          cctx->tag_set = 1;
          return len;
      } else {
          int rv = -1;
          if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
                                                       cctx->str) :
              !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
              unsigned char tag[16];
              if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
                  if (!CRYPTO_memcmp(tag, ctx->buf, cctx->M))
                      rv = len;
              }
          }
          if (rv == -1)
              OPENSSL_cleanse(out, len);
          cctx->iv_set = 0;
          cctx->tag_set = 0;
          cctx->len_set = 0;
          return rv;
      }
  
  }
  
  # define aes_ccm_cleanup NULL
  
  BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, ccm, CCM,
                      EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS)
      BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, ccm, CCM,
                      EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS)
      BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, ccm, CCM,
                      EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS)
  #endif
  typedef struct {
      union {
          double align;
          AES_KEY ks;
      } ks;
      /* Indicates if IV has been set */
      unsigned char *iv;
  } EVP_AES_WRAP_CTX;
  
  static int aes_wrap_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                               const unsigned char *iv, int enc)
  {
      EVP_AES_WRAP_CTX *wctx = ctx->cipher_data;
      if (!iv && !key)
          return 1;
      if (key) {
          if (ctx->encrypt)
              AES_set_encrypt_key(key, ctx->key_len * 8, &wctx->ks.ks);
          else
              AES_set_decrypt_key(key, ctx->key_len * 8, &wctx->ks.ks);
          if (!iv)
              wctx->iv = NULL;
      }
      if (iv) {
          memcpy(ctx->iv, iv, 8);
          wctx->iv = ctx->iv;
      }
      return 1;
  }
  
  static int aes_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                             const unsigned char *in, size_t inlen)
  {
      EVP_AES_WRAP_CTX *wctx = ctx->cipher_data;
      size_t rv;
      if (!in)
          return 0;
      if (inlen % 8)
          return -1;
      if (ctx->encrypt && inlen < 8)
          return -1;
      if (!ctx->encrypt && inlen < 16)
          return -1;
      if (!out) {
          if (ctx->encrypt)
              return inlen + 8;
          else
              return inlen - 8;
      }
      if (ctx->encrypt)
          rv = CRYPTO_128_wrap(&wctx->ks.ks, wctx->iv, out, in, inlen,
                               (block128_f) AES_encrypt);
      else
          rv = CRYPTO_128_unwrap(&wctx->ks.ks, wctx->iv, out, in, inlen,
                                 (block128_f) AES_decrypt);
      return rv ? (int)rv : -1;
  }
  
  #define WRAP_FLAGS      (EVP_CIPH_WRAP_MODE \
                  | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
                  | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_FLAG_DEFAULT_ASN1)
  
  static const EVP_CIPHER aes_128_wrap = {
      NID_id_aes128_wrap,
      8, 16, 8, WRAP_FLAGS,
      aes_wrap_init_key, aes_wrap_cipher,
      NULL,
      sizeof(EVP_AES_WRAP_CTX),
      NULL, NULL, NULL, NULL
  };
  
  const EVP_CIPHER *EVP_aes_128_wrap(void)
  {
      return &aes_128_wrap;
  }
  
  static const EVP_CIPHER aes_192_wrap = {
      NID_id_aes192_wrap,
      8, 24, 8, WRAP_FLAGS,
      aes_wrap_init_key, aes_wrap_cipher,
      NULL,
      sizeof(EVP_AES_WRAP_CTX),
      NULL, NULL, NULL, NULL
  };
  
  const EVP_CIPHER *EVP_aes_192_wrap(void)
  {
      return &aes_192_wrap;
  }
  
  static const EVP_CIPHER aes_256_wrap = {
      NID_id_aes256_wrap,
      8, 32, 8, WRAP_FLAGS,
      aes_wrap_init_key, aes_wrap_cipher,
      NULL,
      sizeof(EVP_AES_WRAP_CTX),
      NULL, NULL, NULL, NULL
  };
  
  const EVP_CIPHER *EVP_aes_256_wrap(void)
  {
      return &aes_256_wrap;
  }
  