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/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2024 Cisco Systems, Inc.
*/
#include <vlib/vlib.h>
#include <vnet/plugin/plugin.h>
#include <vnet/crypto/crypto.h>
#include <crypto_native/crypto_native.h>
#include <vppinfra/crypto/sha2.h>
static_always_inline u32
crypto_native_ops_hash_sha2 (vlib_main_t *vm, vnet_crypto_op_t *ops[],
u32 n_ops, vnet_crypto_op_chunk_t *chunks,
clib_sha2_type_t type, int maybe_chained)
{
vnet_crypto_op_t *op = ops[0];
clib_sha2_ctx_t ctx;
u32 n_left = n_ops;
next:
if (op->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS)
{
vnet_crypto_op_chunk_t *chp = chunks + op->chunk_index;
clib_sha2_init (&ctx, type);
for (int j = 0; j < op->n_chunks; j++, chp++)
clib_sha2_update (&ctx, chp->src, chp->len);
clib_sha2_final (&ctx, op->digest);
}
else
clib_sha2 (type, op->src, op->len, op->digest);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
if (--n_left)
{
op += 1;
goto next;
}
return n_ops;
}
static_always_inline u32
crypto_native_ops_hmac_sha2 (vlib_main_t *vm, vnet_crypto_op_t *ops[],
u32 n_ops, vnet_crypto_op_chunk_t *chunks,
clib_sha2_type_t type)
{
crypto_native_main_t *cm = &crypto_native_main;
vnet_crypto_op_t *op = ops[0];
u32 n_left = n_ops;
clib_sha2_hmac_ctx_t ctx;
u8 buffer[64];
u32 sz, n_fail = 0;
for (; n_left; n_left--, op++)
{
clib_sha2_hmac_init (
&ctx, type, (clib_sha2_hmac_key_data_t *) cm->key_data[op->key_index]);
if (op->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS)
{
vnet_crypto_op_chunk_t *chp = chunks + op->chunk_index;
for (int j = 0; j < op->n_chunks; j++, chp++)
clib_sha2_hmac_update (&ctx, chp->src, chp->len);
}
else
clib_sha2_hmac_update (&ctx, op->src, op->len);
clib_sha2_hmac_final (&ctx, buffer);
if (op->digest_len)
{
sz = op->digest_len;
if (op->flags & VNET_CRYPTO_OP_FLAG_HMAC_CHECK)
{
if ((memcmp (op->digest, buffer, sz)))
{
n_fail++;
op->status = VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC;
continue;
}
}
else
clib_memcpy_fast (op->digest, buffer, sz);
}
else
{
sz = clib_sha2_variants[type].digest_size;
if (op->flags & VNET_CRYPTO_OP_FLAG_HMAC_CHECK)
{
if ((memcmp (op->digest, buffer, sz)))
{
n_fail++;
op->status = VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC;
continue;
}
}
else
clib_memcpy_fast (op->digest, buffer, sz);
}
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
}
return n_ops - n_fail;
}
static void *
sha2_key_add (vnet_crypto_key_t *key, clib_sha2_type_t type)
{
clib_sha2_hmac_key_data_t *kd;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
clib_sha2_hmac_key_data (type, key->data, vec_len (key->data), kd);
return kd;
}
static int
probe ()
{
#if defined(__SHA__) && defined(__x86_64__)
if (clib_cpu_supports_sha ())
return 50;
#elif defined(__ARM_FEATURE_SHA2)
if (clib_cpu_supports_sha2 ())
return 10;
#endif
return -1;
}
#define _(b) \
static u32 crypto_native_ops_hash_sha##b ( \
vlib_main_t *vm, vnet_crypto_op_t *ops[], u32 n_ops) \
{ \
return crypto_native_ops_hash_sha2 (vm, ops, n_ops, 0, CLIB_SHA2_##b, 0); \
} \
\
static u32 crypto_native_ops_chained_hash_sha##b ( \
vlib_main_t *vm, vnet_crypto_op_t *ops[], vnet_crypto_op_chunk_t *chunks, \
u32 n_ops) \
{ \
return crypto_native_ops_hash_sha2 (vm, ops, n_ops, chunks, \
CLIB_SHA2_##b, 1); \
} \
\
static u32 crypto_native_ops_hmac_sha##b ( \
vlib_main_t *vm, vnet_crypto_op_t *ops[], u32 n_ops) \
{ \
return crypto_native_ops_hmac_sha2 (vm, ops, n_ops, 0, CLIB_SHA2_##b); \
} \
\
static u32 crypto_native_ops_chained_hmac_sha##b ( \
vlib_main_t *vm, vnet_crypto_op_t *ops[], vnet_crypto_op_chunk_t *chunks, \
u32 n_ops) \
{ \
return crypto_native_ops_hmac_sha2 (vm, ops, n_ops, chunks, \
CLIB_SHA2_##b); \
} \
\
static void *sha2_##b##_key_add (vnet_crypto_key_t *k) \
{ \
return sha2_key_add (k, CLIB_SHA2_##b); \
} \
\
CRYPTO_NATIVE_OP_HANDLER (crypto_native_hash_sha##b) = { \
.op_id = VNET_CRYPTO_OP_SHA##b##_HASH, \
.fn = crypto_native_ops_hash_sha##b, \
.cfn = crypto_native_ops_chained_hash_sha##b, \
.probe = probe, \
}; \
CRYPTO_NATIVE_OP_HANDLER (crypto_native_hmac_sha##b) = { \
.op_id = VNET_CRYPTO_OP_SHA##b##_HMAC, \
.fn = crypto_native_ops_hmac_sha##b, \
.cfn = crypto_native_ops_chained_hmac_sha##b, \
.probe = probe, \
}; \
CRYPTO_NATIVE_KEY_HANDLER (crypto_native_hmac_sha##b) = { \
.alg_id = VNET_CRYPTO_ALG_HMAC_SHA##b, \
.key_fn = sha2_##b##_key_add, \
.probe = probe, \
};
_ (224)
_ (256)
#undef _
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