src/plugins/crypto_native/aes_ctr.c

   1 /* SPDX-License-Identifier: Apache-2.0
   2  * Copyright(c) 2024 Cisco Systems, Inc.
   3  */
   4
   5 #include <vlib/vlib.h>
   6 #include <vnet/plugin/plugin.h>
   7 #include <vnet/crypto/crypto.h>
   8 #include <crypto_native/crypto_native.h>
   9 #include <vppinfra/crypto/aes_ctr.h>
  10
  11 #if __GNUC__ > 4 && !__clang__ && CLIB_DEBUG == 0
  12 #pragma GCC optimize("O3")
  13 #endif
  14
  15 static_always_inline u32
  16 aes_ops_aes_ctr (vlib_main_t *vm, vnet_crypto_op_t *ops[], u32 n_ops,
  17                  vnet_crypto_op_chunk_t *chunks, aes_key_size_t ks,
  18                  int maybe_chained)
  19 {
  20   crypto_native_main_t *cm = &crypto_native_main;
  21   vnet_crypto_op_t *op = ops[0];
  22   aes_ctr_key_data_t *kd;
  23   aes_ctr_ctx_t ctx;
  24   u32 n_left = n_ops;
  25
  26 next:
  27   kd = (aes_ctr_key_data_t *) cm->key_data[op->key_index];
  28
  29   clib_aes_ctr_init (&ctx, kd, op->iv, ks);
  30   if (op->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS)
  31     {
  32       vnet_crypto_op_chunk_t *chp = chunks + op->chunk_index;
  33       for (int j = 0; j < op->n_chunks; j++, chp++)
  34         clib_aes_ctr_transform (&ctx, chp->src, chp->dst, chp->len, ks);
  35     }
  36   else
  37     clib_aes_ctr_transform (&ctx, op->src, op->dst, op->len, ks);
  38
  39   op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
  40
  41   if (--n_left)
  42     {
  43       op += 1;
  44       goto next;
  45     }
  46
  47   return n_ops;
  48 }
  49
  50 static_always_inline void *
  51 aes_ctr_key_exp (vnet_crypto_key_t *key, aes_key_size_t ks)
  52 {
  53   aes_ctr_key_data_t *kd;
  54
  55   kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
  56
  57   clib_aes_ctr_key_expand (kd, key->data, ks);
  58
  59   return kd;
  60 }
  61
  62 #define foreach_aes_ctr_handler_type _ (128) _ (192) _ (256)
  63
  64 #define _(x)                                                                  \
  65   static u32 aes_ops_aes_ctr_##x (vlib_main_t *vm, vnet_crypto_op_t *ops[],   \
  66                                   u32 n_ops)                                  \
  67   {                                                                           \
  68     return aes_ops_aes_ctr (vm, ops, n_ops, 0, AES_KEY_##x, 0);               \
  69   }                                                                           \
  70   static u32 aes_ops_aes_ctr_##x##_chained (                                  \
  71     vlib_main_t *vm, vnet_crypto_op_t *ops[], vnet_crypto_op_chunk_t *chunks, \
  72     u32 n_ops)                                                                \
  73   {                                                                           \
  74     return aes_ops_aes_ctr (vm, ops, n_ops, chunks, AES_KEY_##x, 1);          \
  75   }                                                                           \
  76   static void *aes_ctr_key_exp_##x (vnet_crypto_key_t *key)                   \
  77   {                                                                           \
  78     return aes_ctr_key_exp (key, AES_KEY_##x);                                \
  79   }
  80
  81 foreach_aes_ctr_handler_type;
  82 #undef _
  83
  84 clib_error_t *
  85 #if defined(__VAES__) && defined(__AVX512F__)
  86 crypto_native_aes_ctr_init_icl (vlib_main_t *vm)
  87 #elif defined(__VAES__)
  88 crypto_native_aes_ctr_init_adl (vlib_main_t *vm)
  89 #elif __AVX512F__
  90 crypto_native_aes_ctr_init_skx (vlib_main_t *vm)
  91 #elif __AVX2__
  92 crypto_native_aes_ctr_init_hsw (vlib_main_t *vm)
  93 #elif __aarch64__
  94 crypto_native_aes_ctr_init_neon (vlib_main_t *vm)
  95 #else
  96 crypto_native_aes_ctr_init_slm (vlib_main_t *vm)
  97 #endif
  98 {
  99   crypto_native_main_t *cm = &crypto_native_main;
 100
 101 #define _(x)                                                                  \
 102   vnet_crypto_register_ops_handlers (                                         \
 103     vm, cm->crypto_engine_index, VNET_CRYPTO_OP_AES_##x##_CTR_ENC,            \
 104     aes_ops_aes_ctr_##x, aes_ops_aes_ctr_##x##_chained);                      \
 105   vnet_crypto_register_ops_handlers (                                         \
 106     vm, cm->crypto_engine_index, VNET_CRYPTO_OP_AES_##x##_CTR_DEC,            \
 107     aes_ops_aes_ctr_##x, aes_ops_aes_ctr_##x##_chained);                      \
 108   cm->key_fn[VNET_CRYPTO_ALG_AES_##x##_CTR] = aes_ctr_key_exp_##x;
 109   foreach_aes_ctr_handler_type;
 110 #undef _
 111   return 0;
 112 }