qat_hw_sm3.c

/* ====================================================================
 *
 *
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/*****************************************************************************
 * @file qat_hw_sm3.c
 *
 * This file contains the engine implementations for SM3 Hash operations
 *
 *****************************************************************************/

#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <string.h>
#include <pthread.h>
#include <signal.h>

#include "e_qat.h"
#include "qat_utils.h"
#include "qat_hw_callback.h"
#include "qat_hw_polling.h"
#include "qat_events.h"
#include "qat_evp.h"

#include "cpa.h"
#include "cpa_types.h"
#include "cpa_cy_sym.h"
#include "qat_hw_sm3.h"
#include "qat_hw_ciphers.h"

#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/tls1.h>
#include <openssl/async.h>
#include <openssl/ssl.h>

#ifdef ENABLE_QAT_HW_SM3
static inline QAT_SM3_CTX *qat_hw_sm3_get_ctx(EVP_MD_CTX *ctx)
{
    if (unlikely(ctx == NULL)) {
        WARN("hw sm3 ctx %p is NULL\n", ctx);
        return NULL;
    }

    return ((QAT_SM3_CTX *) (EVP_MD_CTX_md_data(ctx) + sizeof(SM3_CTX)));
}

/******************************************************************************
 * function:
 *
 * static void qat_hw_sm3_cb(void *pCallbackTag, CpaStatus status,
 *                           const CpaCySymOp operationType,
 *                           void *pOpData, CpaBufferList *pDstBuffer,
 *                           CpaBoolean verifyResult)
 *
 * @param pCallbackTag  [IN] -  Opaque value provided by user while making
 *                              individual function call. Cast to op_done_pipe_t.
 * @param status        [IN] -  Status of the operation.
 * @param operationType [IN] -  Identifies the operation type requested.
 * @param pOpData       [IN] -  Pointer to structure with input parameters.
 * @param pDstBuffer    [IN] -  Destination buffer to hold the data output.
 * @param verifyResult  [IN] -  Used to verify digest result.
 *
 * description:
 Callback to indicate the completion of crypto operation
 ******************************************************************************/
static void qat_hw_sm3_cb(void *pCallbackTag, CpaStatus status,
                          const CpaCySymOp operationType,
                          void *pOpData, CpaBufferList *pDstBuffer,
                          CpaBoolean verifyResult)
{
    if (enable_heuristic_polling)
        QAT_ATOMIC_DEC(num_cipher_pipeline_requests_in_flight);

    qat_crypto_callbackFn(pCallbackTag, status, CPA_CY_SYM_OP_HASH, pOpData,
                          NULL, CPA_TRUE);
}

/******************************************************************************
* function:
*         qat_hw_sm3_setup_param(EVP_MD_CTX *ctx)
*
* @param ctx [IN] - pointer to context
*
* @retval 1      function succeeded
* @retval 0      function failed
*
* description:
*    This function synchronises the initialisation of the QAT session and
*  pre-allocates the necessary buffers for the session.
******************************************************************************/
static int qat_hw_sm3_setup_param(QAT_SM3_CTX *qat_sm3_ctx)
{
    int numBuffers = 2;
    Cpa32U bufferMetaSize = 0;
    Cpa32U sctx_size = 0;
    CpaStatus status;
    CpaCySymSessionSetupData *session_data;

    session_data = OPENSSL_zalloc(sizeof(CpaCySymSessionSetupData)
                                  + sizeof(CpaCySymOpData)
                                  + sizeof(int));
    if (NULL == session_data) {
        WARN("session setup data Malloc failure\n");
        QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, ERR_R_MALLOC_FAILURE);
        return 0;
    }
    qat_sm3_ctx->session_data = session_data;
    qat_sm3_ctx->pOpData = (void *)session_data
        + sizeof(CpaCySymSessionSetupData);
    qat_sm3_ctx->rc_refs = (void *)session_data
        + sizeof(CpaCySymSessionSetupData)
        + sizeof(CpaCySymOpData);

    session_data->sessionPriority = CPA_CY_PRIORITY_HIGH;
    /* Hash only operation on the data */
    session_data->symOperation = CPA_CY_SYM_OP_HASH;
    /* Place the digest result in a buffer unrelated to srcBuffer */
    session_data->digestIsAppended = CPA_FALSE;
    /* Set FALSE to generate a message digest, instead of doing digest verify */
    session_data->verifyDigest = CPA_FALSE;

    /* Set the hash mode and the length of the digest */
    session_data->hashSetupData.hashAlgorithm = CPA_CY_SYM_HASH_SM3;
    session_data->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_PLAIN;
    session_data->hashSetupData.digestResultLenInBytes = QAT_SM3_DIGEST_SIZE;
    session_data->hashSetupData.authModeSetupData.authKey = NULL;
    session_data->hashSetupData.nestedModeSetupData.pInnerPrefixData = NULL;
    session_data->hashSetupData.nestedModeSetupData.pOuterPrefixData = NULL;

    DUMP_SESSION_SETUP_DATA(qat_sm3_ctx->session_data);

    /* Allocate instance */
    qat_sm3_ctx->inst_num = get_instance(QAT_INSTANCE_SYM, QAT_INSTANCE_ANY);
    if (qat_sm3_ctx->inst_num == QAT_INVALID_INSTANCE) {
        WARN("Failed to get a QAT instance.\n");
        QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, QAT_R_GET_INSTANCE_FAILURE);
        goto err;
    }

    qat_sm3_ctx->qat_svm = !qat_instance_details[qat_sm3_ctx->inst_num].qat_instance_info.requiresPhysicallyContiguousMemory;
    DEBUG("inst_num = %d inst mem type = %d \n", qat_sm3_ctx->inst_num, qat_sm3_ctx->qat_svm);

    /* Determine size of session context to allocate */
    status =
        cpaCySymSessionCtxGetSize(qat_instance_handles[qat_sm3_ctx->inst_num],
                                  qat_sm3_ctx->session_data, &sctx_size);
    if (status != CPA_STATUS_SUCCESS) {
        WARN("Failed to get SessionCtx size.\n");
        QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, ERR_R_INTERNAL_ERROR);
        goto err;
    }
    DEBUG("Size of session ctx = %d\n", sctx_size);

    qat_sm3_ctx->session_ctx =
        (CpaCySymSessionCtx) qat_mem_alloc(sctx_size, qat_sm3_ctx->qat_svm,__FILE__, __LINE__);
    if (qat_sm3_ctx->session_ctx == NULL) {
        WARN("Memory alloc failed for session ctx\n");
        QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    /* Initialise Session data */
    status = cpaCySymInitSession(qat_instance_handles[qat_sm3_ctx->inst_num],
                                 qat_hw_sm3_cb,
                                 qat_sm3_ctx->session_data,
                                 qat_sm3_ctx->session_ctx);
    if (status != CPA_STATUS_SUCCESS) {
        WARN("cpaCySymInitSession failed! Status = %d\n", status);
        if (((status == CPA_STATUS_RESTARTING) || (status == CPA_STATUS_FAIL))) {
            CRYPTO_QAT_LOG
                ("Failed to submit request to qat inst_num %d device_id %d\n",
                 qat_sm3_ctx->inst_num,
                 qat_instance_details[qat_sm3_ctx->inst_num].qat_instance_info.
                 physInstId.packageId);
        }
        QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, ERR_R_INTERNAL_ERROR);
        goto err;
    }

    /* Get buffer metasize */
    status =
        cpaCyBufferListGetMetaSize(qat_instance_handles[qat_sm3_ctx->inst_num],
                                   numBuffers, &bufferMetaSize);
    if (status != CPA_STATUS_SUCCESS) {
        WARN("cpaCyBufferListGetMetaSize failed for the instance id %d\n",
             qat_sm3_ctx->inst_num);
        QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, ERR_R_INTERNAL_ERROR);
        goto err;
    }
    DEBUG("Buffer MetaSize : %d\n", bufferMetaSize);

    if (bufferMetaSize) {
        qat_sm3_ctx->pSrcBufferList.pPrivateMetaData =
            qat_mem_alloc(bufferMetaSize, qat_sm3_ctx->qat_svm, __FILE__, __LINE__);
        if (qat_sm3_ctx->pSrcBufferList.pPrivateMetaData == NULL) {
            WARN("QMEM alloc failed for PrivateData\n");
            QATerr(QAT_F_QAT_HW_SM3_SETUP_PARAM, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        qat_sm3_ctx->pSrcBufferList.numBuffers = 1;

    } else {
        qat_sm3_ctx->pSrcBufferList.pPrivateMetaData = NULL;
        qat_sm3_ctx->pSrcBufferList.numBuffers = 0;
    }

    qat_sm3_ctx->context_params_set = 1;

    return 1;

 err:
    QAT_MEM_FREE_NONZERO_BUFF(qat_sm3_ctx->pSrcBufferList.pPrivateMetaData, qat_sm3_ctx->qat_svm);
    QAT_MEM_FREE_NONZERO_BUFF(qat_sm3_ctx->session_ctx, qat_sm3_ctx->qat_svm);
    OPENSSL_free(session_data);
    qat_sm3_ctx->session_data = NULL;
    qat_sm3_ctx->pOpData = NULL;
    qat_sm3_ctx->rc_refs = NULL;

    return 0;
}

static int qat_hw_sm3_do_offload(QAT_SM3_CTX *qat_sm3_ctx, const void *in,
                                 size_t len, int packet_type)
{
    int job_ret = 0;
    int ret = 0;                /* Default fail */
    CpaStatus status;
    op_done_t op_done;
    thread_local_variables_t *tlv = NULL;
    CpaFlatBuffer src_buffer;

    if (!qat_sm3_ctx->context_params_set) {
        if (!qat_hw_sm3_setup_param(qat_sm3_ctx)) {
            WARN("SM3 operational params setup failed.\n");
            QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
            return 0;
        }
    }

    /* The variables in and out remain separate */
    if (!qat_sm3_ctx->qat_svm) {
        src_buffer.pData =
           qaeCryptoMemAlloc(len + QAT_SM3_DIGEST_SIZE, __FILE__, __LINE__);
        if ((src_buffer.pData) == NULL) {
            WARN("Unable to allocate memory for buffer for sm3 hash.\n");
            QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    }

    src_buffer.dataLenInBytes = len + QAT_SM3_DIGEST_SIZE;

    if (len == 0) {
        DEBUG("qat hw start offload: Length 0\n");
    } else {
        DUMPL("qat hw start offload", in, (len < 128) ? len : 128);
        if (!qat_sm3_ctx->qat_svm)
            memcpy(src_buffer.pData, in, len);
        else
            src_buffer.pData = (Cpa8U *)in;
    }

    qat_sm3_ctx->pSrcBufferList.pBuffers = &src_buffer;

    tlv = qat_check_create_local_variables();
    if (NULL == tlv) {
        WARN("could not create local variables\n");
        QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
        goto err;
    }

    qat_init_op_done(&op_done);
    if (op_done.job != NULL) {
        if (qat_setup_async_event_notification(op_done.job) == 0) {
            WARN("Failed to setup async event notification\n");
            QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
            qat_cleanup_op_done(&op_done);
            goto err;
        }
    }

    qat_sm3_ctx->pSrcBufferList.pUserData = NULL;

    qat_sm3_ctx->pOpData->sessionCtx = qat_sm3_ctx->session_ctx;

    if (CPA_CY_SYM_PACKET_TYPE_LAST_PARTIAL == packet_type &&
        qat_sm3_ctx->qat_offloaded == 0) {
        qat_sm3_ctx->pOpData->packetType = CPA_CY_SYM_PACKET_TYPE_FULL;
    } else {
        qat_sm3_ctx->pOpData->packetType = packet_type;
    }

    /* The message length, in bytes, of the source buffer that the hash
     * will be computed on. */
    qat_sm3_ctx->pOpData->messageLenToHashInBytes = len;
    qat_sm3_ctx->pOpData->pDigestResult = src_buffer.pData + len;

    if (!is_instance_available(qat_sm3_ctx->inst_num)) {
        WARN("QAT instance %d not available.\n", qat_sm3_ctx->inst_num);
        QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
        if (op_done.job != NULL) {
            qat_clear_async_event_notification(op_done.job);
        }
        qat_cleanup_op_done(&op_done);
        goto err;
    }

    /* same src & dst for an in-place operation */
    status = qat_sym_perform_op(qat_sm3_ctx->inst_num,
                                &op_done,
                                qat_sm3_ctx->pOpData,
                                &(qat_sm3_ctx->pSrcBufferList),
                                &(qat_sm3_ctx->pSrcBufferList),
                                &(qat_sm3_ctx->session_data->verifyDigest));

    if (status != CPA_STATUS_SUCCESS) {
        if (((status == CPA_STATUS_RESTARTING) || (status == CPA_STATUS_FAIL))) {
            CRYPTO_QAT_LOG
                ("Failed to submit request to qat inst_num %d device_id %d - %s\n",
                 qat_sm3_ctx->inst_num,
                 qat_instance_details[qat_sm3_ctx->inst_num].qat_instance_info.
                 physInstId.packageId, __func__);
        }
        QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
        if (op_done.job != NULL)
            qat_clear_async_event_notification(op_done.job);

        qat_cleanup_op_done(&op_done);
        goto err;
    }

    QAT_INC_IN_FLIGHT_REQS(num_requests_in_flight, tlv);
    if (qat_use_signals()) {
        if (tlv->localOpsInFlight == 1) {
            if (sem_post(&hw_polling_thread_sem) != 0) {
                WARN("hw sem_post failed!, hw_polling_thread_sem address: %p.\n", &hw_polling_thread_sem);
                QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
                QAT_DEC_IN_FLIGHT_REQS(num_requests_in_flight, tlv);
                if (op_done.job != NULL)
                    qat_clear_async_event_notification(op_done.job);

                qat_cleanup_op_done(&op_done);
                goto err;
            }
        }
    }

    if (enable_heuristic_polling)
        QAT_ATOMIC_INC(num_cipher_pipeline_requests_in_flight);

    do {
        if (op_done.job != NULL) {
            /* If we get a failure on qat_pause_job then we will
               not flag an error here and quit because we have
               an asynchronous request in flight.
               We don't want to start cleaning up data
               structures that are still being used. If
               qat_pause_job fails we will just yield and
               loop around and try again until the request
               completes and we can continue. */
            if ((job_ret = qat_pause_job(op_done.job, ASYNC_STATUS_OK)) == 0)
                sched_yield();

        } else {
            sched_yield();
        }
    } while (!op_done.flag || QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

    QAT_DEC_IN_FLIGHT_REQS(num_requests_in_flight, tlv);

    if (op_done.verifyResult != CPA_TRUE) {
        WARN("Verification of result failed\n");
        QATerr(QAT_F_QAT_HW_SM3_DO_OFFLOAD, ERR_R_INTERNAL_ERROR);
        if (op_done.status == CPA_STATUS_FAIL) {
            CRYPTO_QAT_LOG
                ("Verification of result failed for qat inst_num %d device_id %d - %s\n",
                 inst_num,
                 qat_instance_details[qat_sm3_ctx->_inst_num].qat_instance_info.
                 physInstId.packageId, __func__);
            qat_cleanup_op_done(&op_done);
            goto err;
        }
    }
    qat_cleanup_op_done(&op_done);

    /* final partial */
    if (CPA_CY_SYM_PACKET_TYPE_LAST_PARTIAL == packet_type) {
        memcpy(qat_sm3_ctx->digest_data, src_buffer.pData + len,
               QAT_SM3_DIGEST_SIZE);
        ret = 1;
    } else {
        qat_sm3_ctx->qat_offloaded = 1;
        ret = 1;
    }

 err:
    if (!qat_sm3_ctx->qat_svm)
        qaeCryptoMemFreeNonZero(src_buffer.pData);
    return ret;
}

/******************************************************************************
* function:
*         qat_hw_sm3_init(EVP_MD_CTX *ctx)
*
* @param ctx     [IN]  - pointer to existing context
*
* @retval 1      function succeeded
* @retval 0      function failed
*
* description:
*    This function initialises the hash algorithm parameters for EVP context.
*
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
int qat_hw_sm3_init(void *ctx)
#else
int qat_hw_sm3_init(EVP_MD_CTX *ctx)
#endif
{
#ifndef QAT_OPENSSL_PROVIDER
    memset(QAT_SM3_GET_CTX(ctx), 0, sizeof(QAT_SM3_CTX));
# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
    if (qat_openssl3_sm3_fallback == 1) {
        DEBUG("- Switched to software mode\n");

        int sts = 0;
        int (*sw_fn_ptr)(EVP_MD_CTX *) = NULL;
        sw_fn_ptr = EVP_MD_meth_get_init((EVP_MD *)EVP_sm3());
        sts = (*sw_fn_ptr)(ctx);
        DEBUG("SW Finished %p\n", ctx);
        return sts;
    }
# endif
#endif
    return 1;
}

/******************************************************************************
* function:
*    qat_hw_sm3_update(EVP_MD_CTX *ctx, const void *in, size_t len)
*
* @param ctx        [IN]  - pointer to existing context
* @param in         [IN]  - input buffer
* @param len        [IN]  - length of input buffer
*
* @retval -1      function failed
* @retval len     function succeeded
*
* description:
*    This function performs the cryptographic transform according to the
*  parameters setup during initialisation.
*
*
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
int qat_hw_sm3_update(void *ctx, const void *in, size_t len)
#else
int qat_hw_sm3_update(EVP_MD_CTX *ctx, const void *in, size_t len)
#endif
{
    const unsigned char *data = in;
# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
    int sts = 0;
    int (*sw_fn_ptr)(EVP_MD_CTX *, const void *, size_t) = NULL;
#endif
    QAT_SM3_CTX *qat_sm3_ctx = NULL;
    unsigned char *p;
    size_t n;

    if (len == 0) {
        DEBUG("sm3 hw update with len = 0 %p\n", ctx);
        return 1;
    }

    if (unlikely(in == NULL)) {
        WARN("in %p is NULL\n", in);
        QATerr(QAT_F_QAT_HW_SM3_UPDATE, QAT_R_INVALID_INPUT);
        return 0;
    }

# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
    if (qat_openssl3_sm3_fallback == 1) {
        DEBUG("- Switched to software mode\n");
        goto fallback;
    }
# endif
#ifdef QAT_OPENSSL_PROVIDER
    qat_sm3_ctx = (QAT_SM3_CTX *)ctx;
#else
    qat_sm3_ctx = qat_hw_sm3_get_ctx(ctx);
#endif
    if (unlikely(qat_sm3_ctx == NULL)) {
        WARN("SM3 context hash data is NULL.\n");
        QATerr(QAT_F_QAT_HW_SM3_UPDATE, QAT_R_SM3_CTX_NULL);
        return 0;
    }

    qat_sm3_ctx->rcv_count += len;
    DUMPL("sm3 hw update receive", in, len);

    n = qat_sm3_ctx->num;
    /* Packets left from previous process */
    if (n != 0) {
        p = (unsigned char *)qat_sm3_ctx->data;

        /* Offload threshold met */
        if (len >= QAT_SM3_OFFLOAD_THRESHOLD
            || len + n >= QAT_SM3_OFFLOAD_THRESHOLD) {
            /* Use part of new packet filling the packet buffer */
            memcpy(p + n, data, QAT_SM3_OFFLOAD_THRESHOLD - n);

            if (!qat_hw_sm3_do_offload
                (qat_sm3_ctx, p, QAT_SM3_OFFLOAD_THRESHOLD,
                 CPA_CY_SYM_PACKET_TYPE_PARTIAL))
                return 1;

            /* The data left of new input */
            n = QAT_SM3_OFFLOAD_THRESHOLD - n;
            data += n;
            len -= n;
            qat_sm3_ctx->num = 0;
            /*
             * We use memset rather than OPENSSL_cleanse() here deliberately.
             * Using OPENSSL_cleanse() here could be a performance issue. It
             * will get properly cleansed on finalisation so this isn't a
             * security problem.
             */
            memset(p, 0, QAT_SM3_OFFLOAD_THRESHOLD); /* keep it zeroed */
        } else {
            /* Append the new packets to buffer */
            memcpy(p + n, data, len);
            qat_sm3_ctx->num += (unsigned int)len;

            return 1;
        }
    }

    n = len / QAT_SM3_OFFLOAD_THRESHOLD;
    if (n > 0) {
        n *= QAT_SM3_OFFLOAD_THRESHOLD;

        if (!qat_hw_sm3_do_offload(qat_sm3_ctx, in, n,
                                   CPA_CY_SYM_PACKET_TYPE_PARTIAL))
            return 1;

        data += n;
        len -= n;
    }

    /* Save the bytes into buffer if there're some bytes left
       after the previous update. */
    if (len != 0) {
        qat_sm3_ctx->data = OPENSSL_zalloc(QAT_SM3_OFFLOAD_THRESHOLD);
        qat_sm3_ctx->data_refs = OPENSSL_zalloc(sizeof(int));

        p = (unsigned char *)qat_sm3_ctx->data;
        qat_sm3_ctx->num = (unsigned int)len;
        memcpy(p, data, len);
    }
    return 1;

# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
fallback:
    sw_fn_ptr = EVP_MD_meth_get_update((EVP_MD *)EVP_sm3());
    sts = (*sw_fn_ptr)(ctx, in, len);
    DEBUG("SW Finished %p\n", ctx);
    return sts;
# endif
}

#ifdef QAT_OPENSSL_PROVIDER
int qat_hw_sm3_copy(QAT_SM3_CTX *to, const QAT_SM3_CTX *from)
#else
int qat_hw_sm3_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
#endif
{
    QAT_SM3_CTX *qat_from;

    if (NULL == from) {
        WARN("sm3 copy from %p is NULL\n", from);
        QATerr(QAT_F_QAT_HW_SM3_COPY, QAT_R_CTX_NULL);
        return 0;
    }
#ifndef QAT_OPENSSL_PROVIDER
    /* Digest-copy can be called without a md_data in some condition */
    if (EVP_MD_CTX_md_data(from) == 0) {
        DEBUG("digest copy without md_data\n");
        return 1;
    }
    qat_from = QAT_SM3_GET_CTX(from);
#else
    qat_from = (QAT_SM3_CTX *)from;
#endif
    if (NULL == qat_from) {
        WARN("qat_from %p is NULL\n", qat_from);
        QATerr(QAT_F_QAT_HW_SM3_COPY, QAT_R_CTX_NULL);
        return 0;
    }

    if (qat_from->rc_refs)
        (*qat_from->rc_refs)++;

    if (qat_from->data_refs)
        (*qat_from->data_refs)++;

    return 1;
}
/******************************************************************************
* function:
*    qat_hw_sm3_final(EVP_MD_CTX *ctx, unsigned char *md)
*
* @param ctx       [IN]  - pointer to existing context
* @param md        [OUT] - output buffer for digest result
*
* @retval -1     function failed
* @retval  1     function succeeded
*
* description:
*    This function performs the copy operation of digest into md buffer.
*
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
int qat_hw_sm3_final(void *ctx, unsigned char *md)
#else
int qat_hw_sm3_final(EVP_MD_CTX *ctx, unsigned char *md)
#endif
{
    QAT_SM3_CTX *qat_sm3_ctx = NULL;
# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
    int sts = 0;
    int (*sw_fn_ptr)(EVP_MD_CTX *, unsigned char *) = NULL;
#endif

    if (md == NULL) {
        WARN("hw sm3 md is null\n");
        QATerr(QAT_F_QAT_HW_SM3_FINAL, QAT_R_INPUT_PARAM_INVALID);
        return 0;
    }

# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
    if (qat_openssl3_sm3_fallback == 1) {
        DEBUG("- Switched to software mode\n");
        goto fallback;
    }
# endif

#ifdef QAT_OPENSSL_PROVIDER
    qat_sm3_ctx = (QAT_SM3_CTX *)ctx;
#else
    qat_sm3_ctx = qat_hw_sm3_get_ctx(ctx);
#endif
    if (qat_sm3_ctx == NULL) {
        WARN("qat_sm3_ctx is NULL\n");
        QATerr(QAT_F_QAT_HW_SM3_FINAL, QAT_R_CTX_NULL);
        return 0;
    }
# ifndef ENABLE_QAT_SMALL_PKT_OFFLOAD
    if (qat_sm3_ctx->rcv_count <= CRYPTO_SMALL_PACKET_OFFLOAD_THRESHOLD_HW_SM3) {
        /* Software calculation can start from init, because SPO threshold will
           always small than context buffer and all data are stored in context
           buffer */
#ifndef QAT_OPENSSL_PROVIDER
        int (*sw_init_ptr)(EVP_MD_CTX *);
        int (*sw_update_ptr)(EVP_MD_CTX *, const void *, size_t);
        int (*sw_final_ptr)(EVP_MD_CTX *, unsigned char *);

        DUMPL("Start ossl calculate", qat_sm3_ctx->data, qat_sm3_ctx->num);

        sw_init_ptr = EVP_MD_meth_get_init((EVP_MD *)EVP_sm3());
        sw_update_ptr = EVP_MD_meth_get_update((EVP_MD *)EVP_sm3());
        sw_final_ptr = EVP_MD_meth_get_final((EVP_MD *)EVP_sm3());

        if ((*sw_init_ptr) (ctx) != 1
            || (*sw_update_ptr) (ctx, qat_sm3_ctx->data, qat_sm3_ctx->num) != 1
            || (*sw_final_ptr) (ctx, md) != 1) {
            WARN("Software calculate failed %p\n", ctx);
            return 0;
        }

	DUMPL("DigestResult (OSSL)", md, QAT_SM3_DIGEST_SIZE);

	return 1;
#else
        qat_sm3_ctx->sw_md_ctx = EVP_MD_CTX_new();
        if (qat_sm3_ctx->sw_md_ctx == NULL)
            WARN("EVP_MD_CTX_new failed.\n");
        qat_sm3_ctx->sw_md = EVP_MD_fetch(NULL, "sm3", "provider=default");
        if (qat_sm3_ctx->sw_md == NULL) {
            WARN("EVP_MD_fetch failed.\n");
        }
        if (!EVP_DigestInit_ex(qat_sm3_ctx->sw_md_ctx, qat_sm3_ctx->sw_md, NULL)
            || !EVP_DigestUpdate(qat_sm3_ctx->sw_md_ctx, qat_sm3_ctx->data, qat_sm3_ctx->num)
            || !EVP_DigestFinal_ex(qat_sm3_ctx->sw_md_ctx, md, NULL)) {
           WARN("QAT_SW SM3 Offload failed \n");
           return 0;
        }
        DUMPL("DigestResult (OSSL)", md, QAT_SM3_DIGEST_SIZE);
        return 1;
# endif
    }
#endif
    qat_sm3_ctx->digest_data = md;
    if (!qat_hw_sm3_do_offload(qat_sm3_ctx, qat_sm3_ctx->data, qat_sm3_ctx->num,
                               CPA_CY_SYM_PACKET_TYPE_LAST_PARTIAL))
        return 0;

    DUMPL("DigestResult (QAT_HW)", md, QAT_SM3_DIGEST_SIZE);

    return 1;

# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
fallback:
    sw_fn_ptr = EVP_MD_meth_get_final((EVP_MD *)EVP_sm3());
    sts = (*sw_fn_ptr)(ctx, md);
    DEBUG("SW Finished %p\n", ctx);
    return sts;
# endif
}

/******************************************************************************
* function:
*    qat_hw_sm3_cleanup(EVP_MD_CTX *ctx)
*
* @param ctx    [IN]  - pointer to existing context
*
* @retval 1      function succeeded
* @retval 0      function failed
*
* description:
*    This function will cleanup all allocated resources required to perform the
*  cryptographic transform.
*
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
int qat_hw_sm3_cleanup(QAT_SM3_CTX *ctx)
#else
int qat_hw_sm3_cleanup(EVP_MD_CTX *ctx)
#endif
{
    QAT_SM3_CTX *qat_sm3_ctx;
    CpaStatus status = 0;
    int ret_val = 1;
    CpaBoolean sessionInUse = CPA_FALSE;

#ifdef QAT_OPENSSL_PROVIDER
    qat_sm3_ctx = (QAT_SM3_CTX *)ctx;
#else
    qat_sm3_ctx = qat_hw_sm3_get_ctx(ctx);
#endif
    if (NULL == qat_sm3_ctx) {
        WARN("qat_sm3_ctx is NULL\n");
        QATerr(QAT_F_QAT_HW_SM3_CLEANUP, QAT_R_CTX_NULL);
        return 0;
    }

#ifndef QAT_OPENSSL_PROVIDER
    if (EVP_MD_CTX_md_data(ctx) == NULL) {
        DEBUG("digest cleanup without md_data\n");
        return 1;
    }
#endif

    if (qat_sm3_ctx->data_refs) {
        if (*qat_sm3_ctx->data_refs > 0) {
            (*qat_sm3_ctx->data_refs)--;
            DEBUG("HW SM3 data reference decrease to %d\n",
                  *qat_sm3_ctx->data_refs);
        } else {
            OPENSSL_free(qat_sm3_ctx->data);
            OPENSSL_free(qat_sm3_ctx->data_refs);
	}
    }

    if (qat_sm3_ctx->context_params_set) {
        if (*qat_sm3_ctx->rc_refs > 0) {
            (*qat_sm3_ctx->rc_refs)--;
            DEBUG("HW SM3 resource reference decrease to %d\n",
                  *qat_sm3_ctx->rc_refs);
            return 1;
        }

        if (is_instance_available(qat_sm3_ctx->inst_num)) {
            /* Wait for in-flight requests before removing session */
            if (qat_sm3_ctx->session_ctx != NULL) {
                do {
                    cpaCySymSessionInUse(qat_sm3_ctx->session_ctx, &sessionInUse);
                } while (sessionInUse);
            }

            if ((status =
                 cpaCySymRemoveSession(qat_instance_handles
                                       [qat_sm3_ctx->inst_num],
                                       qat_sm3_ctx->session_ctx))
                != CPA_STATUS_SUCCESS) {
                WARN("cpaCySymRemoveSession FAILED, status= %d.!\n", status);
                ret_val = 0;
            }
        } else {
            WARN("instance no longer available\n");
        }

        QAT_MEM_FREE_NONZERO_BUFF(qat_sm3_ctx->session_ctx, qat_sm3_ctx->qat_svm);
        qat_sm3_ctx->session_ctx = NULL;

        QAT_MEM_FREE_NONZERO_BUFF(qat_sm3_ctx->pSrcBufferList.pPrivateMetaData, qat_sm3_ctx->qat_svm);
        qat_sm3_ctx->pSrcBufferList.pPrivateMetaData = NULL;

        OPENSSL_free(qat_sm3_ctx->session_data);
        qat_sm3_ctx->session_data = NULL;

        qat_sm3_ctx->context_params_set = 0;
    }

    return ret_val;
}

int qat_hw_sm3_md_methods(EVP_MD *c)
{
    int res = 1;

    res &= EVP_MD_meth_set_result_size(c, QAT_SM3_STATE_SIZE);
    res &= EVP_MD_meth_set_input_blocksize(c, QAT_SM3_BLOCK_SIZE);
    /* Totally 3 memory sections in application data, common EVP_MD,
       SM3_CTX used for SM3 software, and QAT_SM3_CTX for QAT_HW */
    res &= EVP_MD_meth_set_app_datasize(c, sizeof(EVP_MD *) +
                        sizeof(SM3_CTX) + sizeof(QAT_SM3_CTX));
    res &= EVP_MD_meth_set_flags(c, EVP_MD_CTX_FLAG_REUSE);
#ifndef QAT_OPENSSL_PROVIDER
    res &= EVP_MD_meth_set_init(c, qat_hw_sm3_init);
    res &= EVP_MD_meth_set_update(c, qat_hw_sm3_update);
    res &= EVP_MD_meth_set_final(c, qat_hw_sm3_final);
    res &= EVP_MD_meth_set_copy(c, qat_hw_sm3_copy);
    res &= EVP_MD_meth_set_cleanup(c, qat_hw_sm3_cleanup);
#endif
    return res;
}

const EVP_MD *qat_hw_create_sm3_meth(int nid, int key_type)
{
    int res = 1;
    EVP_MD *qat_hw_sm3_meth = NULL;

    if ((qat_hw_sm3_meth = EVP_MD_meth_new(nid, key_type)) == NULL) {
        WARN("Failed to allocate digest methods for nid %d\n", nid);
        QATerr(QAT_F_QAT_HW_CREATE_SM3_METH, QAT_R_INIT_FAILURE);
        return NULL;
    }

    if (qat_hw_offload && (qat_hw_algo_enable_mask & ALGO_ENABLE_MASK_SM3)) {
        res = qat_hw_sm3_md_methods(qat_hw_sm3_meth);
        if (0 == res) {
            WARN("Failed to set MD methods for nid %d\n", nid);
            QATerr(QAT_F_QAT_HW_CREATE_SM3_METH, QAT_R_INIT_FAILURE);
            EVP_MD_meth_free(qat_hw_sm3_meth);
            return NULL;
        }

        qat_hw_sm3_offload = 1;
        DEBUG("QAT HW SM3 Registration succeeded\n");

        return qat_hw_sm3_meth;

    } else {
        qat_hw_sm3_offload = 0;
        DEBUG("QAT HW SM3 is disabled, using OpenSSL SW\n");
# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
        qat_openssl3_sm3_fallback = 1;
        res = qat_hw_sm3_md_methods(qat_hw_sm3_meth);
        if (0 == res) {
            WARN("Failed to set MD methods for nid %d\n", nid);
            EVP_MD_meth_free(qat_hw_sm3_meth);
            return NULL;
        }
        return qat_hw_sm3_meth;
# else
#  ifdef OPENSSL_NO_SM2_SM3
	return NULL;
#  else
        return (EVP_MD *)EVP_sm3();
#  endif
# endif
    }
}

#endif                          /* ENABLE_QAT_HW_SM3 */