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