drivers/crypto/qat/qat_sym.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2015-2018 Intel Corporation
   3  */
   4
   5 #ifndef _QAT_SYM_H_
   6 #define _QAT_SYM_H_
   7
   8 #include <rte_cryptodev_pmd.h>
   9
  10 #ifdef BUILD_QAT_SYM
  11 #include <openssl/evp.h>
  12
  13 #include "qat_common.h"
  14 #include "qat_sym_session.h"
  15 #include "qat_sym_pmd.h"
  16 #include "qat_logs.h"
  17
  18 #define BYTE_LENGTH    8
  19 /* bpi is only used for partial blocks of DES and AES
  20  * so AES block len can be assumed as max len for iv, src and dst
  21  */
  22 #define BPI_MAX_ENCR_IV_LEN ICP_QAT_HW_AES_BLK_SZ
  23
  24 struct qat_sym_session;
  25
  26 struct qat_sym_op_cookie {
  27         struct qat_sgl qat_sgl_src;
  28         struct qat_sgl qat_sgl_dst;
  29         phys_addr_t qat_sgl_src_phys_addr;
  30         phys_addr_t qat_sgl_dst_phys_addr;
  31 };
  32
  33 int
  34 qat_sym_build_request(void *in_op, uint8_t *out_msg,
  35                 void *op_cookie, enum qat_device_gen qat_dev_gen);
  36
  37
  38 /** Encrypt a single partial block
  39  *  Depends on openssl libcrypto
  40  *  Uses ECB+XOR to do CFB encryption, same result, more performant
  41  */
  42 static inline int
  43 bpi_cipher_encrypt(uint8_t *src, uint8_t *dst,
  44                 uint8_t *iv, int ivlen, int srclen,
  45                 void *bpi_ctx)
  46 {
  47         EVP_CIPHER_CTX *ctx = (EVP_CIPHER_CTX *)bpi_ctx;
  48         int encrypted_ivlen;
  49         uint8_t encrypted_iv[BPI_MAX_ENCR_IV_LEN];
  50         uint8_t *encr = encrypted_iv;
  51
  52         /* ECB method: encrypt the IV, then XOR this with plaintext */
  53         if (EVP_EncryptUpdate(ctx, encrypted_iv, &encrypted_ivlen, iv, ivlen)
  54                                                                 <= 0)
  55                 goto cipher_encrypt_err;
  56
  57         for (; srclen != 0; --srclen, ++dst, ++src, ++encr)
  58                 *dst = *src ^ *encr;
  59
  60         return 0;
  61
  62 cipher_encrypt_err:
  63         QAT_DP_LOG(ERR, "libcrypto ECB cipher encrypt failed");
  64         return -EINVAL;
  65 }
  66
  67 static inline uint32_t
  68 qat_bpicipher_postprocess(struct qat_sym_session *ctx,
  69                                 struct rte_crypto_op *op)
  70 {
  71         int block_len = qat_cipher_get_block_size(ctx->qat_cipher_alg);
  72         struct rte_crypto_sym_op *sym_op = op->sym;
  73         uint8_t last_block_len = block_len > 0 ?
  74                         sym_op->cipher.data.length % block_len : 0;
  75
  76         if (last_block_len > 0 &&
  77                         ctx->qat_dir == ICP_QAT_HW_CIPHER_ENCRYPT) {
  78
  79                 /* Encrypt last block */
  80                 uint8_t *last_block, *dst, *iv;
  81                 uint32_t last_block_offset;
  82
  83                 last_block_offset = sym_op->cipher.data.offset +
  84                                 sym_op->cipher.data.length - last_block_len;
  85                 last_block = (uint8_t *) rte_pktmbuf_mtod_offset(sym_op->m_src,
  86                                 uint8_t *, last_block_offset);
  87
  88                 if (unlikely(sym_op->m_dst != NULL))
  89                         /* out-of-place operation (OOP) */
  90                         dst = (uint8_t *) rte_pktmbuf_mtod_offset(sym_op->m_dst,
  91                                                 uint8_t *, last_block_offset);
  92                 else
  93                         dst = last_block;
  94
  95                 if (last_block_len < sym_op->cipher.data.length)
  96                         /* use previous block ciphertext as IV */
  97                         iv = dst - block_len;
  98                 else
  99                         /* runt block, i.e. less than one full block */
 100                         iv = rte_crypto_op_ctod_offset(op, uint8_t *,
 101                                         ctx->cipher_iv.offset);
 102
 103 #if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
 104                 QAT_DP_HEXDUMP_LOG(DEBUG, "BPI: src before post-process:",
 105                         last_block, last_block_len);
 106                 if (sym_op->m_dst != NULL)
 107                         QAT_DP_HEXDUMP_LOG(DEBUG,
 108                                 "BPI: dst before post-process:",
 109                                 dst, last_block_len);
 110 #endif
 111                 bpi_cipher_encrypt(last_block, dst, iv, block_len,
 112                                 last_block_len, ctx->bpi_ctx);
 113 #if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
 114                 QAT_DP_HEXDUMP_LOG(DEBUG, "BPI: src after post-process:",
 115                                 last_block, last_block_len);
 116                 if (sym_op->m_dst != NULL)
 117                         QAT_DP_HEXDUMP_LOG(DEBUG,
 118                                 "BPI: dst after post-process:",
 119                                 dst, last_block_len);
 120 #endif
 121         }
 122         return sym_op->cipher.data.length - last_block_len;
 123 }
 124
 125 static inline void
 126 qat_sym_process_response(void **op, uint8_t *resp)
 127 {
 128
 129         struct icp_qat_fw_comn_resp *resp_msg =
 130                         (struct icp_qat_fw_comn_resp *)resp;
 131         struct rte_crypto_op *rx_op = (struct rte_crypto_op *)(uintptr_t)
 132                         (resp_msg->opaque_data);
 133
 134 #if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
 135         QAT_DP_HEXDUMP_LOG(DEBUG, "qat_response:", (uint8_t *)resp_msg,
 136                         sizeof(struct icp_qat_fw_comn_resp));
 137 #endif
 138
 139         if (ICP_QAT_FW_COMN_STATUS_FLAG_OK !=
 140                         ICP_QAT_FW_COMN_RESP_CRYPTO_STAT_GET(
 141                         resp_msg->comn_hdr.comn_status)) {
 142
 143                 rx_op->status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
 144         } else {
 145                 struct qat_sym_session *sess = (struct qat_sym_session *)
 146                                                 get_sym_session_private_data(
 147                                                 rx_op->sym->session,
 148                                                 cryptodev_qat_driver_id);
 149
 150
 151                 if (sess->bpi_ctx)
 152                         qat_bpicipher_postprocess(sess, rx_op);
 153                 rx_op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 154         }
 155         *op = (void *)rx_op;
 156 }
 157 #else
 158
 159 static inline void
 160 qat_sym_process_response(void **op __rte_unused, uint8_t *resp __rte_unused)
 161 {
 162 }
 163 #endif
 164 #endif /* _QAT_SYM_H_ */