/* ====================================================================
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 *
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 *
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 *   modification, are permitted provided that the following conditions
 *   are met:
 *
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 *       notice, this list of conditions and the following disclaimer.
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 *       notice, this list of conditions and the following disclaimer in
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/*****************************************************************************
 * @file qat_sw_ec.c
 *
 * This file provides multibuffer support for ECDH & ECDSA
 *
 *****************************************************************************/

#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#define __USE_GNU

#include <pthread.h>
#include <openssl/rsa.h>
#include <openssl/err.h>
#ifdef QAT_BORINGSSL
# include <openssl/ecdsa.h>
#endif /* QAT_BORINGSSL */
#include <string.h>
#include <unistd.h>
#include <signal.h>

/* Local includes */
#include "e_qat.h"
#include "qat_utils.h"
#include "qat_events.h"
#include "qat_fork.h"
#include "qat_evp.h"
#include "qat_sw_ec.h"
#include "qat_sw_request.h"
#ifdef ENABLE_QAT_FIPS
# include "qat_prov_cmvp.h"
#endif

/* Crypto_mb includes */
#include "crypto_mb/ec_nistp256.h"
#include "crypto_mb/ec_nistp384.h"
#include "crypto_mb/ec_sm2.h"
#include "crypto_mb/cpu_features.h"

# if defined(ENABLE_QAT_FIPS) && defined(ENABLE_QAT_SW_ECDSA)
extern int qat_fips_kat_test;
static const unsigned char KINV_256[] = {
        0x62, 0x15, 0x9E, 0x5B, 0xA9, 0xE7, 0x12, 0xFB,
        0x09, 0x8C, 0xCE, 0x8F, 0xE2, 0x0F, 0x1B, 0xED,
        0x83, 0x46, 0x55, 0x4E, 0x98, 0xEF, 0x3C, 0x7C,
        0x1F, 0xC3, 0x33, 0x2B, 0xA6, 0x7D, 0x87, 0xEF
};
static const unsigned char R_256[] = {
        0x2B, 0x42, 0xF5, 0x76, 0xD0, 0x7F, 0x41, 0x65,
        0xFF, 0x65, 0xD1, 0xF3, 0xB1, 0x50, 0x0F, 0x81,
        0xE4, 0x4C, 0x31, 0x6F, 0x1F, 0x0B, 0x3E, 0xF5,
        0x73, 0x25, 0xB6, 0x9A, 0xCA, 0x46, 0x10, 0x4F
};
static const unsigned char KINV_384[] = {
        0xAC, 0x22, 0x7D, 0xA5, 0x19, 0x29, 0x53, 0x3D,
        0xFC, 0x2E, 0x9E, 0xEF, 0xB4, 0xE0, 0xF7, 0xBD,
        0x22, 0x39, 0x2C, 0xA7, 0x32, 0x89, 0xED, 0x1C,
        0x6C, 0x00, 0xB2, 0x14, 0xE8, 0x87, 0x4D, 0x80,
        0x07, 0xC8, 0xAC, 0x46, 0xB2, 0x5D, 0x67, 0x7D,
        0xFE, 0x9B, 0x1C, 0x6C, 0x10, 0xA4, 0x7E, 0x4A
};
static const unsigned char R_384[] = {
        0x30, 0xEA, 0x51, 0x4F, 0xC0, 0xD3, 0x8D, 0x82,
        0x08, 0x75, 0x6F, 0x06, 0x81, 0x13, 0xC7, 0xCA,
        0xDA, 0x9F, 0x66, 0xA3, 0xB4, 0x0E, 0xA3, 0xB3,
        0x13, 0xD0, 0x40, 0xD9, 0xB5, 0x7D, 0xD4, 0x1A,
        0x33, 0x27, 0x95, 0xD0, 0x2C, 0xC7, 0xD5, 0x07,
        0xFC, 0xEF, 0x9F, 0xAF, 0x01, 0xA2, 0x70, 0x88
};
#endif

static inline int mb_ec_check_curve(int curve_type)
{
    int ret = 0;

    switch (curve_type) {
    case NID_X9_62_prime256v1:
        if (qat_sw_ecp256)
            ret = EC_P256;
        break;
    case NID_secp384r1:
        if (qat_sw_ecp384)
            ret = EC_P384;
        break;
#ifndef QAT_BORINGSSL
    case NID_sm2:
        if (qat_sw_ecsm2)
            ret = EC_SM2;
        break;
#endif /* QAT_BORINGSSL */
#ifdef QAT_BORINGSSL
    case NID_secp521r1:
        /* Report failure for P-521 running in async mode - not supported by QAT_SW */
        {
        ASYNC_JOB *job = ASYNC_get_current_job();
        if (job != NULL) {
            WARN("QAT_SW does not support ECDSA P-521. Switch to sync mode to use BoringSSL software implementation.\n");
            QATerr(QAT_F_MULTIBUFF_EC_RANGE_CHECK, QAT_R_CURVE_NOT_SUPPORTED);
            ret = -1;
        }
        }
        break;
#endif /* QAT_BORINGSSL */
    default:
        break;
    }
    return ret;
}

#ifdef ENABLE_QAT_SW_ECDSA
void process_ecdsa_sign_reqs(mb_thread_data *tlv, int bit_len)
{
    ecdsa_sign_op_data *ecdsa_sign_req_array[MULTIBUFF_BATCH] = {0};
    unsigned char *sign_r[MULTIBUFF_BATCH] = {0};
    unsigned char *sign_s[MULTIBUFF_BATCH] = {0};;
    const unsigned char *digest[MULTIBUFF_BATCH] = {0};
    const BIGNUM *eph_key[MULTIBUFF_BATCH] = {0};
    const BIGNUM *priv_key[MULTIBUFF_BATCH] = {0};
    unsigned int sts = 0;
    int local_request_no = 0;
    int req_num = 0;

    START_RDTSC(&ecdsa_cycles_sign_execute);

    /* Build Arrays of pointers for call */
    switch (bit_len) {
    case EC_P256:
        DEBUG("Dequeue ECDSA p256 sign reqs.\n");
        while ((ecdsa_sign_req_array[req_num] =
                mb_queue_ecdsap256_sign_dequeue(tlv->ecdsap256_sign_queue)) != NULL) {
            sign_r[req_num] = ecdsa_sign_req_array[req_num]->sign_r;
            sign_s[req_num] = ecdsa_sign_req_array[req_num]->sign_s;
            digest[req_num] = ecdsa_sign_req_array[req_num]->digest;
            eph_key[req_num] = ecdsa_sign_req_array[req_num]->eph_key;
            priv_key[req_num] = ecdsa_sign_req_array[req_num]->priv_key;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    case EC_P384:
        DEBUG("Dequeue ECDSA p384 sign reqs.\n");
        while ((ecdsa_sign_req_array[req_num] =
                mb_queue_ecdsap384_sign_dequeue(tlv->ecdsap384_sign_queue)) != NULL) {
            sign_r[req_num] = ecdsa_sign_req_array[req_num]->sign_r;
            sign_s[req_num] = ecdsa_sign_req_array[req_num]->sign_s;
            digest[req_num] = ecdsa_sign_req_array[req_num]->digest;
            eph_key[req_num] = ecdsa_sign_req_array[req_num]->eph_key;
            priv_key[req_num] = ecdsa_sign_req_array[req_num]->priv_key;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    }
    local_request_no = req_num;

    switch (bit_len) {
    case EC_P256:
        DEBUG("Submitting %d ECDSA p256 sign requests\n", local_request_no);
        sts = mbx_nistp256_ecdsa_sign_ssl_mb8(sign_r,
                                              sign_s,
                                              digest,
                                              eph_key,
                                              priv_key,
                                              NULL);
        break;
    case EC_P384:
        DEBUG("Submitting %d ECDSA p384 sign requests\n", local_request_no);
        num_ecdsa_sw_sign_reqs += local_request_no;
        sts = mbx_nistp384_ecdsa_sign_ssl_mb8(sign_r,
                                              sign_s,
                                              digest,
                                              eph_key,
                                              priv_key,
                                              NULL);
        break;
    }
    for (req_num = 0; req_num < local_request_no; req_num++) {
        if (ecdsa_sign_req_array[req_num]->sts != NULL) {
            if (MBX_GET_STS(sts, req_num) == MBX_STATUS_OK) {
                DEBUG("Multibuffer ECDSA Sign request[%d] success\n", req_num);
                *ecdsa_sign_req_array[req_num]->sts = 1;
            } else {
                WARN("Multibuffer ECDSA Sign request[%d] failure - sts %d\n",
                      req_num, MBX_GET_STS(sts, req_num));
                *ecdsa_sign_req_array[req_num]->sts = 0;
            }
        }

        if (ecdsa_sign_req_array[req_num]->job) {
#ifdef QAT_BORINGSSL
            bssl_mb_async_job_finish_wait(ecdsa_sign_req_array[req_num]->job,
                ASYNC_JOB_COMPLETE, ASYNC_STATUS_OK);
#endif
            qat_wake_job(ecdsa_sign_req_array[req_num]->job,
                         ASYNC_STATUS_OK);
        }
        OPENSSL_cleanse(ecdsa_sign_req_array[req_num],
                        sizeof(ecdsa_sign_op_data));
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist,
                                 ecdsa_sign_req_array[req_num]);
    }

# ifdef QAT_SW_HEURISTIC_TIMEOUT
    switch (bit_len) {
    case EC_P256:
        mb_ecdsap256_sign_req_rates.req_this_period += local_request_no;
        break;
    case EC_P384:
        mb_ecdsap384_sign_req_rates.req_this_period += local_request_no;
        break;
    }
# endif

    STOP_RDTSC(&ecdsa_cycles_sign_execute, 1, "[ECDSA:sign_execute]");
    DEBUG("Processed Final Request\n");
}

void process_ecdsa_sign_setup_reqs(mb_thread_data *tlv, int bit_len)
{
    ecdsa_sign_setup_op_data *ecdsa_sign_setup_req_array[MULTIBUFF_BATCH] = {0};
    BIGNUM *k_inv[MULTIBUFF_BATCH] = {0};
    BIGNUM *sig_rp[MULTIBUFF_BATCH] = {0};
    const BIGNUM *eph_key[MULTIBUFF_BATCH] = {0};
    unsigned int sts = 0;
    int local_request_no = 0;
    int req_num = 0;

    START_RDTSC(&ecdsa_cycles_sign_setup_execute);

    /* Build Arrays of pointers for call */
    switch (bit_len) {
    case EC_P256:
        DEBUG("Dequeue ECDSA p256 sign setup reqs.\n");
        while ((ecdsa_sign_setup_req_array[req_num] =
                mb_queue_ecdsap256_sign_setup_dequeue(tlv->ecdsap256_sign_setup_queue)) != NULL) {
            k_inv[req_num] = ecdsa_sign_setup_req_array[req_num]->k_inv;
            sig_rp[req_num] = ecdsa_sign_setup_req_array[req_num]->sig_rp;
            eph_key[req_num] = ecdsa_sign_setup_req_array[req_num]->eph_key;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    case EC_P384:
        DEBUG("Dequeue ECDSA p384 sign setup reqs.\n");
        while ((ecdsa_sign_setup_req_array[req_num] =
                mb_queue_ecdsap384_sign_setup_dequeue(tlv->ecdsap384_sign_setup_queue)) != NULL) {
            k_inv[req_num] = ecdsa_sign_setup_req_array[req_num]->k_inv;
            sig_rp[req_num] = ecdsa_sign_setup_req_array[req_num]->sig_rp;
            eph_key[req_num] = ecdsa_sign_setup_req_array[req_num]->eph_key;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    }
    local_request_no = req_num;

    switch (bit_len) {
    case EC_P256:
        DEBUG("Submitting %d ECDSA p256 sign setup requests\n", local_request_no);
        sts = mbx_nistp256_ecdsa_sign_setup_ssl_mb8(k_inv,
                                                    sig_rp,
                                                    eph_key,
                                                    NULL);
        break;
    case EC_P384:
        DEBUG("Submitting %d ECDSA p384 sign setup requests\n", local_request_no);
        sts = mbx_nistp384_ecdsa_sign_setup_ssl_mb8(k_inv,
                                                    sig_rp,
                                                    eph_key,
                                                    NULL);
        break;
    }
    for (req_num = 0; req_num < local_request_no; req_num++) {
        if (ecdsa_sign_setup_req_array[req_num]->sts != NULL) {
            if (MBX_GET_STS(sts, req_num) == MBX_STATUS_OK) {
                DEBUG("Multibuffer ECDSA Sign setup request[%d] success\n", req_num);
                *ecdsa_sign_setup_req_array[req_num]->sts = 1;
            } else {
                WARN("Multibuffer ECDSA Sign setup request[%d] failure - sts %d\n",
                      req_num, MBX_GET_STS(sts, req_num));
                *ecdsa_sign_setup_req_array[req_num]->sts = 0;
            }
        }

        if (ecdsa_sign_setup_req_array[req_num]->job) {
            qat_wake_job(ecdsa_sign_setup_req_array[req_num]->job,
                         ASYNC_STATUS_OK);
        }
        OPENSSL_cleanse(ecdsa_sign_setup_req_array[req_num],
                        sizeof(ecdsa_sign_setup_op_data));
        mb_flist_ecdsa_sign_setup_push(tlv->ecdsa_sign_setup_freelist,
                                       ecdsa_sign_setup_req_array[req_num]);
    }

# ifdef QAT_SW_HEURISTIC_TIMEOUT
    switch (bit_len) {
    case EC_P256:
        mb_ecdsap256_sign_setup_req_rates.req_this_period += local_request_no;
        break;
    case EC_P384:
        mb_ecdsap384_sign_setup_req_rates.req_this_period += local_request_no;
        break;
    }
# endif

    STOP_RDTSC(&ecdsa_cycles_sign_setup_execute, 1, "[ECDSA:sign_setup_execute]");
    DEBUG("Processed Final Request\n");
}

void process_ecdsa_sign_sig_reqs(mb_thread_data *tlv, int bit_len)
{
    ecdsa_sign_sig_op_data *ecdsa_sign_sig_req_array[MULTIBUFF_BATCH] = {0};
    unsigned char *sign_r[MULTIBUFF_BATCH] = {0};
    unsigned char *sign_s[MULTIBUFF_BATCH] = {0};;
    const unsigned char *digest[MULTIBUFF_BATCH] = {0};
    const BIGNUM *k_inv[MULTIBUFF_BATCH] = {0};
    const BIGNUM *sig_rp[MULTIBUFF_BATCH] = {0};
    const BIGNUM *priv_key[MULTIBUFF_BATCH] = {0};
    unsigned int sts = 0;
    int local_request_no = 0;
    int req_num = 0;

    START_RDTSC(&ecdsa_cycles_sign_sig_execute);

    /* Build Arrays of pointers for call */
    switch (bit_len) {
    case EC_P256:
        DEBUG("Dequeue ECDSA p256 sign sig reqs.\n");
        while ((ecdsa_sign_sig_req_array[req_num] =
                mb_queue_ecdsap256_sign_sig_dequeue(tlv->ecdsap256_sign_sig_queue)) != NULL) {
            sign_r[req_num] = ecdsa_sign_sig_req_array[req_num]->sign_r;
            sign_s[req_num] = ecdsa_sign_sig_req_array[req_num]->sign_s;
            digest[req_num] = ecdsa_sign_sig_req_array[req_num]->digest;
            sig_rp[req_num] = ecdsa_sign_sig_req_array[req_num]->sig_rp;
            k_inv[req_num] = ecdsa_sign_sig_req_array[req_num]->k_inv;
            priv_key[req_num] = ecdsa_sign_sig_req_array[req_num]->priv_key;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    case EC_P384:
        DEBUG("Dequeue ECDSA p384 sign sig reqs.\n");
        while ((ecdsa_sign_sig_req_array[req_num] =
                mb_queue_ecdsap384_sign_sig_dequeue(tlv->ecdsap384_sign_sig_queue)) != NULL) {
            sign_r[req_num] = ecdsa_sign_sig_req_array[req_num]->sign_r;
            sign_s[req_num] = ecdsa_sign_sig_req_array[req_num]->sign_s;
            digest[req_num] = ecdsa_sign_sig_req_array[req_num]->digest;
            sig_rp[req_num] = ecdsa_sign_sig_req_array[req_num]->sig_rp;
            k_inv[req_num] = ecdsa_sign_sig_req_array[req_num]->k_inv;
            priv_key[req_num] = ecdsa_sign_sig_req_array[req_num]->priv_key;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    }
    local_request_no = req_num;

    switch (bit_len) {
    case EC_P256:
        DEBUG("Submitting %d ECDSA p256 sign sig requests\n", local_request_no);
        sts = mbx_nistp256_ecdsa_sign_complete_ssl_mb8(sign_r,
                                                       sign_s,
                                                       digest,
                                                       sig_rp,
                                                       k_inv,
                                                       priv_key,
                                                       NULL);
        break;
    case EC_P384:
        DEBUG("Submitting %d ECDSA p384 sign sig requests\n", local_request_no);
        sts = mbx_nistp384_ecdsa_sign_complete_ssl_mb8(sign_r,
                                                       sign_s,
                                                       digest,
                                                       sig_rp,
                                                       k_inv,
                                                       priv_key,
                                                       NULL);
        break;
    }
    for (req_num = 0; req_num < local_request_no; req_num++) {
        if (ecdsa_sign_sig_req_array[req_num]->sts != NULL) {
            if (MBX_GET_STS(sts, req_num) == MBX_STATUS_OK) {
                DEBUG("Multibuffer ECDSA Sign sig request[%d] success\n", req_num);
                *ecdsa_sign_sig_req_array[req_num]->sts = 1;
            } else {
                WARN("Multibuffer ECDSA Sign sig request[%d] failure - sts %d\n",
                      req_num, MBX_GET_STS(sts, req_num));
                *ecdsa_sign_sig_req_array[req_num]->sts = 0;
            }
        }

        if (ecdsa_sign_sig_req_array[req_num]->job) {
            qat_wake_job(ecdsa_sign_sig_req_array[req_num]->job,
                         ASYNC_STATUS_OK);
        }
        OPENSSL_cleanse(ecdsa_sign_sig_req_array[req_num],
                        sizeof(ecdsa_sign_sig_op_data));
        mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist,
                                     ecdsa_sign_sig_req_array[req_num]);
    }

# ifdef QAT_SW_HEURISTIC_TIMEOUT
    mb_ecdsap256_sign_sig_req_rates.req_this_period += local_request_no;
# endif

    STOP_RDTSC(&ecdsa_cycles_sign_sig_execute, 1, "[ECDSA:sign_sig_execute]");
    DEBUG("Processed Final Request\n");
}

void process_ecdsa_verify_reqs(mb_thread_data *tlv, int bit_len)
{
    ecdsa_verify_op_data *ecdsa_verify_req_array[MULTIBUFF_BATCH] = {0};
    const int8u* digest[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdsa_verify_x[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdsa_verify_y[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdsa_verify_z[MULTIBUFF_BATCH] = {0};
    const ECDSA_SIG *sig[MULTIBUFF_BATCH] = {0};
    int sts = 0;
    int local_request_no = 0;
    int req_num = 0;

    START_RDTSC(&ecdsa_cycles_verify_execute);

    /* Build Arrays of pointers for call */
    switch (bit_len) {
    case EC_P256:
        DEBUG("Dequeue ECDSA p256 verify reqs.\n");
        while ((ecdsa_verify_req_array[req_num] =
                mb_queue_ecdsap256_verify_dequeue(tlv->ecdsap256_verify_queue)) != NULL) {
            ecdsa_verify_x[req_num] = ecdsa_verify_req_array[req_num]->x;
            ecdsa_verify_y[req_num] = ecdsa_verify_req_array[req_num]->y;
	    ecdsa_verify_z[req_num] = ecdsa_verify_req_array[req_num]->z;
            digest[req_num] = ecdsa_verify_req_array[req_num]->digest;
            sig[req_num] = ecdsa_verify_req_array[req_num]->s;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    case EC_P384:
        DEBUG("Dequeue ECDSA p384 verify reqs.\n");
        while ((ecdsa_verify_req_array[req_num] =
                mb_queue_ecdsap384_verify_dequeue(tlv->ecdsap384_verify_queue)) != NULL) {
            ecdsa_verify_x[req_num] = ecdsa_verify_req_array[req_num]->x;
            ecdsa_verify_y[req_num] = ecdsa_verify_req_array[req_num]->y;
            ecdsa_verify_z[req_num] = ecdsa_verify_req_array[req_num]->z;
            digest[req_num] = ecdsa_verify_req_array[req_num]->digest;
            sig[req_num] = ecdsa_verify_req_array[req_num]->s;

            req_num++;
            if (req_num == MULTIBUFF_MIN_BATCH)
                break;
        }
        break;
    }
    local_request_no = req_num;

    switch (bit_len) {
    case EC_P256:
        DEBUG("Submitting %d ECDSA p256 verify requests\n", local_request_no);
        sts = mbx_nistp256_ecdsa_verify_ssl_mb8(sig,
                                              digest,
                                              ecdsa_verify_x,
                                              ecdsa_verify_y,
					      ecdsa_verify_z,
                                              NULL);
        break;
    case EC_P384:
        DEBUG("Submitting %d ECDSA p384 verify requests\n", local_request_no);
        sts = mbx_nistp384_ecdsa_verify_ssl_mb8(sig,
                                              digest,
                                              ecdsa_verify_x,
                                              ecdsa_verify_y,
                                              ecdsa_verify_z,
                                              NULL);
        break;
    }
    for (req_num = 0; req_num < local_request_no; req_num++) {
        if (ecdsa_verify_req_array[req_num]->sts != NULL) {
            if (MBX_GET_STS(sts, req_num) == MBX_STATUS_OK) {
                DEBUG("Multibuffer ECDSA Verify request[%d] success\n", req_num);
                *ecdsa_verify_req_array[req_num]->sts = 1;
            } else {
                WARN("Multibuffer ECDSA Verify request[%d] failure - sts %d\n",
                      req_num, MBX_GET_STS(sts, req_num));
                *ecdsa_verify_req_array[req_num]->sts = 0;
            }
        }

        if (ecdsa_verify_req_array[req_num]->job) {
            qat_wake_job(ecdsa_verify_req_array[req_num]->job,
                         ASYNC_STATUS_OK);
        }
        OPENSSL_cleanse(ecdsa_verify_req_array[req_num],
                        sizeof(ecdsa_verify_op_data));
        mb_flist_ecdsa_verify_push(tlv->ecdsa_verify_freelist,
                                 ecdsa_verify_req_array[req_num]);
    }

# ifdef QAT_SW_HEURISTIC_TIMEOUT
    switch (bit_len) {
    case EC_P256:
        mb_ecdsap256_verify_req_rates.req_this_period += local_request_no;
        break;
    case EC_P384:
        mb_ecdsap384_verify_req_rates.req_this_period += local_request_no;
        break;
    }
# endif

    STOP_RDTSC(&ecdsa_cycles_verify_execute, 1, "[ECDSA:verify_execute]");
    DEBUG("Processed Final Request\n");
}
#endif

#ifdef ENABLE_QAT_SW_ECDH
void process_ecdh_keygen_reqs(mb_thread_data *tlv, int curve)
{
    ecdh_keygen_op_data *ecdh_keygen_req_array[MULTIBUFF_BATCH] = {0};
    BIGNUM *ecdh_keygen_x[MULTIBUFF_BATCH] = {0};
    BIGNUM *ecdh_keygen_y[MULTIBUFF_BATCH] = {0};
    BIGNUM *ecdh_keygen_z[MULTIBUFF_BATCH] = {0};
    const BIGNUM* ecdh_keygen_privkey[MULTIBUFF_BATCH] = {0};
    unsigned int ecdh_sts = 0;
    int local_request_no = 0;
    int req_num = 0;

    START_RDTSC(&ecdh_cycles_keygen_execute);

    /* Build Arrays of pointers for call */

    switch (curve) {
    case EC_P256:
        DEBUG("Dequeue ECDHP256 keygen reqs.\n");
        while ((ecdh_keygen_req_array[req_num] =
                mb_queue_ecdhp256_keygen_dequeue(tlv->ecdhp256_keygen_queue)) != NULL) {
        ecdh_keygen_x[req_num] = ecdh_keygen_req_array[req_num]->x;
        ecdh_keygen_y[req_num] = ecdh_keygen_req_array[req_num]->y;
        ecdh_keygen_z[req_num] = ecdh_keygen_req_array[req_num]->z;
        ecdh_keygen_privkey[req_num] = ecdh_keygen_req_array[req_num]->priv_key;

        req_num++;
        if (req_num == MULTIBUFF_MIN_BATCH)
            break;
        }
        break;
    case EC_P384:
        DEBUG("Dequeue ECDHP384 keygen reqs.\n");
        while ((ecdh_keygen_req_array[req_num] =
                mb_queue_ecdhp384_keygen_dequeue(tlv->ecdhp384_keygen_queue)) != NULL) {
        ecdh_keygen_x[req_num] = ecdh_keygen_req_array[req_num]->x;
        ecdh_keygen_y[req_num] = ecdh_keygen_req_array[req_num]->y;
        ecdh_keygen_z[req_num] = ecdh_keygen_req_array[req_num]->z;
        ecdh_keygen_privkey[req_num] = ecdh_keygen_req_array[req_num]->priv_key;

	    req_num++;
        if (req_num == MULTIBUFF_MIN_BATCH)
            break;
        }
        break;
    case EC_SM2:
        DEBUG("Dequeue SM2ECDH keygen reqs.\n");
        while ((ecdh_keygen_req_array[req_num] =
                mb_queue_sm2ecdh_keygen_dequeue(tlv->sm2ecdh_keygen_queue)) != NULL) {
        ecdh_keygen_x[req_num] = ecdh_keygen_req_array[req_num]->x;
        ecdh_keygen_y[req_num] = ecdh_keygen_req_array[req_num]->y;
        ecdh_keygen_z[req_num] = ecdh_keygen_req_array[req_num]->z;
        ecdh_keygen_privkey[req_num] = ecdh_keygen_req_array[req_num]->priv_key;

	    req_num++;
        if (req_num == MULTIBUFF_MIN_BATCH)
            break;
        }
        break;
    }

    local_request_no = req_num;

    switch (curve) {
    case EC_P256:
        DEBUG("Submitting %d ECDH p256 Keygen requests\n", local_request_no);
        num_ecdh_sw_keygen_reqs += local_request_no;
        ecdh_sts = mbx_nistp256_ecpublic_key_ssl_mb8(ecdh_keygen_x,
                                                     ecdh_keygen_y,
                                                     ecdh_keygen_z,
                                                     ecdh_keygen_privkey,
                                                     NULL);
        break;
    case EC_P384:
        DEBUG("Submitting %d ECDH p384 Keygen requests\n", local_request_no);
        num_ecdh_sw_keygen_reqs += local_request_no;
        ecdh_sts = mbx_nistp384_ecpublic_key_ssl_mb8(ecdh_keygen_x,
                                                     ecdh_keygen_y,
                                                     ecdh_keygen_z,
                                                     ecdh_keygen_privkey,
                                                     NULL);
         break;
    case EC_SM2:
        DEBUG("Submitting %d ECDH sm2 Keygen requests\n", local_request_no);
        ecdh_sts = mbx_sm2_ecpublic_key_ssl_mb8(ecdh_keygen_x,
                                                ecdh_keygen_y,
                                                ecdh_keygen_z,
                                                ecdh_keygen_privkey,
                                                NULL);
         break;
    }

    for (req_num = 0; req_num < local_request_no; req_num++) {
         if (ecdh_keygen_req_array[req_num]->sts != NULL) {
             if (MBX_GET_STS(ecdh_sts, req_num) == MBX_STATUS_OK) {
                 DEBUG("Multibuffer keygen request[%d] success\n", req_num);
                 *ecdh_keygen_req_array[req_num]->sts = 1;
            } else {
                WARN("Multibuffer keygen request[%d] failure, sts %d \n",
                     req_num, MBX_GET_STS(ecdh_sts, req_num));
                *ecdh_keygen_req_array[req_num]->sts = 0;
            }
        }

        if (ecdh_keygen_req_array[req_num]->job) {
            qat_wake_job(ecdh_keygen_req_array[req_num]->job,
                         ASYNC_STATUS_OK);
        }
        OPENSSL_cleanse(ecdh_keygen_req_array[req_num],
                        sizeof(ecdh_keygen_op_data));
        mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist,
                                  ecdh_keygen_req_array[req_num]);
    }

# ifdef QAT_SW_HEURISTIC_TIMEOUT
    switch (curve) {
    case EC_P256:
        mb_ecdhp256_keygen_req_rates.req_this_period += local_request_no;
        break;
    case EC_P384:
        mb_ecdhp384_keygen_req_rates.req_this_period += local_request_no;
        break;
    case EC_SM2:
        mb_sm2ecdh_keygen_req_rates.req_this_period += local_request_no;
        break;
    }
# endif

    STOP_RDTSC(&ecdh_cycles_keygen_execute, 1, "[ECDH:keygen_execute]");
    DEBUG("Processed Final Request\n");
}

void process_ecdh_compute_reqs(mb_thread_data *tlv, int curve)
{
    ecdh_compute_op_data *ecdh_compute_req_array[MULTIBUFF_BATCH] = {0};
    unsigned char *ecdh_compute_shared_key[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdh_compute_privkey[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdh_compute_x[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdh_compute_y[MULTIBUFF_BATCH] = {0};
    const BIGNUM *ecdh_compute_z[MULTIBUFF_BATCH] = {0};
    unsigned int ecdh_sts = 0;
    int local_request_no = 0;
    int req_num = 0;

    START_RDTSC(&ecdh_cycles_compute_execute);

    /* Build Arrays of pointers for call */

    switch (curve) {
    case EC_P256:
	    DEBUG("Dequeue ECDHP256 compute reqs.\n");
        while ((ecdh_compute_req_array[req_num] =
                mb_queue_ecdhp256_compute_dequeue(tlv->ecdhp256_compute_queue)) != NULL) {
        ecdh_compute_shared_key[req_num] = ecdh_compute_req_array[req_num]->shared_key;
        ecdh_compute_privkey[req_num] = ecdh_compute_req_array[req_num]->priv_key;
        ecdh_compute_x[req_num] = ecdh_compute_req_array[req_num]->x;
        ecdh_compute_y[req_num] = ecdh_compute_req_array[req_num]->y;
        ecdh_compute_z[req_num] = ecdh_compute_req_array[req_num]->z;

        req_num++;
        if (req_num == MULTIBUFF_MIN_BATCH)
            break;
        }
        break;
	case EC_P384:
        DEBUG("Dequeue ECDHP384 compute reqs.\n");
        while ((ecdh_compute_req_array[req_num] =
                mb_queue_ecdhp384_compute_dequeue(tlv->ecdhp384_compute_queue)) != NULL) {
        ecdh_compute_shared_key[req_num] = ecdh_compute_req_array[req_num]->shared_key;
        ecdh_compute_privkey[req_num] = ecdh_compute_req_array[req_num]->priv_key;
        ecdh_compute_x[req_num] = ecdh_compute_req_array[req_num]->x;
        ecdh_compute_y[req_num] = ecdh_compute_req_array[req_num]->y;
        ecdh_compute_z[req_num] = ecdh_compute_req_array[req_num]->z;

        req_num++;
        if (req_num == MULTIBUFF_MIN_BATCH)
            break;
        }
        break;

    case EC_SM2:
        DEBUG("Dequeue SM2ECDH compute reqs.\n");
        while ((ecdh_compute_req_array[req_num] =
                mb_queue_sm2ecdh_compute_dequeue(tlv->sm2ecdh_compute_queue)) != NULL) {
        ecdh_compute_shared_key[req_num] = ecdh_compute_req_array[req_num]->shared_key;
        ecdh_compute_privkey[req_num] = ecdh_compute_req_array[req_num]->priv_key;
        ecdh_compute_x[req_num] = ecdh_compute_req_array[req_num]->x;
        ecdh_compute_y[req_num] = ecdh_compute_req_array[req_num]->y;
        ecdh_compute_z[req_num] = ecdh_compute_req_array[req_num]->z;

        req_num++;
        if (req_num == MULTIBUFF_MIN_BATCH)
            break;
        }
        break;
    }

    local_request_no = req_num;

    switch (curve) {
	case EC_P256:
        DEBUG("Submitting %d ECDH p256 Compute requests\n", local_request_no);
        num_ecdh_sw_derive_reqs += local_request_no;
        ecdh_sts = mbx_nistp256_ecdh_ssl_mb8(ecdh_compute_shared_key,
                                             ecdh_compute_privkey,
                                             ecdh_compute_x,
                                             ecdh_compute_y,
                                             ecdh_compute_z, /* Use Jacobian coordinates */
                                             NULL);
        break;
	case EC_P384:
        DEBUG("Submitting %d ECDH p384 Compute requests\n", local_request_no);
        num_ecdh_sw_derive_reqs += local_request_no;
        ecdh_sts = mbx_nistp384_ecdh_ssl_mb8(ecdh_compute_shared_key,
                                             ecdh_compute_privkey,
                                             ecdh_compute_x,
                                             ecdh_compute_y,
                                             ecdh_compute_z, /* Use Jacobian coordinates */
                                             NULL);
	    break;
	case EC_SM2:
        DEBUG("Submitting %d SM2 ECDH Compute requests\n", local_request_no);
        ecdh_sts = mbx_sm2_ecdh_ssl_mb8(ecdh_compute_shared_key,
                                        ecdh_compute_privkey,
                                        ecdh_compute_x,
                                        ecdh_compute_y,
                                        ecdh_compute_z, /* Use Jacobian coordinates */
                                        NULL);
	    break;
    }

    for (req_num = 0; req_num < local_request_no; req_num++) {
        if (ecdh_compute_req_array[req_num]->sts != NULL) {
            if (MBX_GET_STS(ecdh_sts, req_num) == MBX_STATUS_OK) {
                DEBUG("Multibuffer compute request[%d] success\n", req_num);
                *ecdh_compute_req_array[req_num]->sts = 1;
            } else {
                WARN("Multibuffer compute request[%d] failure, sts %d \n",
                      req_num, MBX_GET_STS(ecdh_sts, req_num));
                *ecdh_compute_req_array[req_num]->sts = 0;
            }
        }

        if (ecdh_compute_req_array[req_num]->job) {
            qat_wake_job(ecdh_compute_req_array[req_num]->job, ASYNC_STATUS_OK);
        }
        OPENSSL_cleanse(ecdh_compute_req_array[req_num],
                        sizeof(ecdh_compute_op_data));
        mb_flist_ecdh_compute_push(tlv->ecdh_compute_freelist,
                                   ecdh_compute_req_array[req_num]);
    }

# ifdef QAT_SW_HEURISTIC_TIMEOUT
    switch (curve) {
    case EC_P256:
        mb_ecdhp256_compute_req_rates.req_this_period += local_request_no;
        break;
    case EC_P384:
        mb_ecdhp384_compute_req_rates.req_this_period += local_request_no;
        break;
    case EC_SM2:
        mb_sm2ecdh_compute_req_rates.req_this_period += local_request_no;
        break;
    }

# endif

    STOP_RDTSC(&ecdh_cycles_compute_execute, 1, "[ECDH:compute_execute]");
    DEBUG("Processed Final Request\n");
}
#endif

#ifdef ENABLE_QAT_SW_ECDSA
#ifdef QAT_BORINGSSL
typedef struct _mb_ecdsa_async_ctx {
    mb_async_ctx async_ctx;
    BN_CTX *ctx;
    ECDSA_SIG *s;
    unsigned char *sig;
    unsigned char *dgst;
    int dlen;
    BIGNUM *ecdsa_sig_r;
    BIGNUM *ecdsa_sig_s;
    size_t buflen;
    int sts;
} mb_ecdsa_async_ctx;

static void mb_ecdsa_sign_callback_fn(void *async_ctx, unsigned char *out_buffer,
                           unsigned long *size, unsigned long max_size)
{
    mb_ecdsa_async_ctx *ecdsa_async_ctx = (mb_ecdsa_async_ctx *)async_ctx;

    if (async_ctx == NULL || out_buffer == NULL ||
            size == NULL || max_size <= 0) {
        return;
    }
    if (ecdsa_async_ctx->sts) {
        /* Convert the buffers to BN */
       BN_bin2bn(ecdsa_async_ctx->sig, ecdsa_async_ctx->buflen, ecdsa_async_ctx->ecdsa_sig_r);
       BN_bin2bn(ecdsa_async_ctx->sig + ecdsa_async_ctx->buflen, ecdsa_async_ctx->buflen,
                 ecdsa_async_ctx->ecdsa_sig_s);

       *size = i2d_ECDSA_SIG(ecdsa_async_ctx->s, &(out_buffer));
        ECDSA_SIG_free(ecdsa_async_ctx->s);
    } else {
        *size = 0;
        WARN("Failure in ECDSA Sign\n");
        ECDSA_SIG_free(ecdsa_async_ctx->s);
    }

    if (ecdsa_async_ctx->ctx) {
        BN_CTX_end(ecdsa_async_ctx->ctx);
        BN_CTX_free(ecdsa_async_ctx->ctx);
    }
    OPENSSL_free(ecdsa_async_ctx->dgst);
    OPENSSL_free(ecdsa_async_ctx->sig);
    OPENSSL_free(ecdsa_async_ctx);
}
#endif /* QAT_BORINGSSL */

int mb_ecdsa_sign(int type, const unsigned char *dgst, int dlen,
                  unsigned char *sig, unsigned int *siglen,
                  const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey)
{
    int ret = 0, len = 0, alloc_buf = 0, bit_len = 0;
#ifndef QAT_BORINGSSL
    int job_ret = 0, sts = 0;
#endif
    BN_CTX *ctx = NULL;
    ECDSA_SIG *s;
    ASYNC_JOB *job;
    size_t buflen;
    static __thread int req_num = 0;
    const EC_GROUP *group;
    BIGNUM *k = NULL;
    const BIGNUM *priv_key, *order;
    const EC_POINT *pub_key = NULL;
    BIGNUM *ecdsa_sig_r = NULL, *ecdsa_sig_s = NULL;
    unsigned char *dgst_buf = NULL;
#ifndef QAT_BORINGSSL
    PFUNC_SIGN sign_pfunc = NULL;
#endif /* QAT_BORINGSSL */
    ecdsa_sign_op_data *ecdsa_sign_req = NULL;
    mb_thread_data *tlv = NULL;
#ifdef QAT_BORINGSSL
    ASYNC_WAIT_CTX *waitctx = NULL;
    mb_ecdsa_async_ctx *ecdsa_async_ctx = NULL;
    int alloc_sig = 0;
#endif /* QAT_BORINGSSL */

    DEBUG("Entering \n");
#ifdef ENABLE_QAT_FIPS
    qat_fips_get_approved_status();
#endif
    if (unlikely(dgst == NULL || dlen <= 0 ||
                 eckey == NULL)) {
        *siglen = 0;
        WARN("Invalid Input param\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_INPUT_PARAM_INVALID);
        return ret;
    }

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    group = EC_KEY_get0_group(eckey);
    priv_key = EC_KEY_get0_private_key(eckey);
    pub_key = EC_KEY_get0_public_key(eckey);

    if (group == NULL || priv_key == NULL || pub_key == NULL) {
        WARN("Either group, priv_key or pub_key are NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_GROUP_PRIV_KEY_PUB_KEY_NULL);
        return ret;
    }

    /* Check if curve is p256 or p384 */
    if ((bit_len = mb_ec_check_curve(EC_GROUP_get_curve_name(group))) == 0) {
        DEBUG("Curve type not supported, using SW Method %d\n",
               EC_GROUP_get_curve_name(group));
#ifdef ENABLE_QAT_FIPS
        return ret;
#else
        goto use_sw_method;
#endif
    } else if (bit_len == -1) {
        return ret;
    }

#ifdef ENABLE_QAT_FIPS
    if (qat_fips_kat_test == 1) {
        if (bit_len == EC_P256) {
            if ((kinv = BN_bin2bn(KINV_256, sizeof(KINV_256), NULL)) == 0)
                 return ret;
            if ((r = BN_bin2bn(R_256, sizeof(R_256), NULL)) == 0)
                 return ret;
        } else {
            if ((kinv = BN_bin2bn(KINV_384, sizeof(KINV_384), NULL)) == 0)
                 return ret;
            if ((r = BN_bin2bn(R_384, sizeof(R_384), NULL)) == 0)
                 return ret;
        }
    }
#endif

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
#ifndef ENABLE_QAT_FIPS
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
#endif
    }

    /* Setup asynchronous notifications */
#ifdef ENABLE_QAT_FIPS
    if (job != NULL && !qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications.\n");
        return ret;
    }
#else
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }
#endif

    if (!EC_KEY_can_sign(eckey)) {
        WARN("Curve doesn't support Signing\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
        return ret;
    }

    tlv = mb_check_thread_local();
    if (NULL == tlv) {
        WARN("Could not create thread local variables\n");
#ifdef ENABLE_QAT_FIPS
        return ret;
#else
        goto use_sw_method;
#endif
    }

    while ((ecdsa_sign_req =
            mb_flist_ecdsa_sign_pop(tlv->ecdsa_sign_freelist)) == NULL) {
#ifndef QAT_BORINGSSL
# ifndef ENABLE_QAT_FIPS
        qat_wake_job(job, ASYNC_STATUS_EAGAIN);
        qat_pause_job(job, ASYNC_STATUS_EAGAIN);
# else
        if (job != NULL) {
            qat_wake_job(job, ASYNC_STATUS_EAGAIN);
            qat_pause_job(job, ASYNC_STATUS_EAGAIN);
        }
# endif
#else /* QAT_BORINGSSL */
        goto use_sw_method;
#endif /* QAT_BORINGSSL */
    }

    DEBUG("QAT SW ECDSA Started %p\n", ecdsa_sign_req);
    START_RDTSC(&ecdsa_cycles_sign_setup);

    /* Buffer up the requests and call the new functions when we have enough
     * requests buffered up */

    if ((s = ECDSA_SIG_new()) == NULL) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("Failure to allocate ECDSA_SIG\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_SIG_MALLOC_FAILURE);
        return ret;
    }

    ecdsa_sig_r = BN_new();
    ecdsa_sig_s = BN_new();

    /* NULL checking of ecdsa_sig_r & ecdsa_sig_s done in ECDSA_SIG_set0() */
    if (ECDSA_SIG_set0(s, ecdsa_sig_r, ecdsa_sig_s) == 0) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("Failure to allocate r and s values to assign to the ECDSA_SIG\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_SIG_SET_R_S_FAILURE);
        goto err;
    }

    if ((ctx = BN_CTX_new()) == NULL) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("Failure to allocate ctx\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_CTX_MALLOC_FAILURE);
        goto err;
    }

    BN_CTX_start(ctx);
    k = BN_CTX_get(ctx);

    if ((order = EC_GROUP_get0_order(group)) ==  NULL) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("Failure to get order from group\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_GET_ORDER_FAILURE);
        goto err;
    }

    len = BN_num_bits(order);
    buflen = (len + 7) / 8;

    /* If digest size is less, expand length with zero as crypto_mb
     * expects digest being sign length */
    if (8 * dlen < len) {
        dgst_buf = OPENSSL_zalloc(buflen);
        if (dgst_buf == NULL) {
            mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
            WARN("Failure to allocate dgst_buf\n");
            QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_MALLOC_FAILURE);
            goto err;
        }
        alloc_buf = 1;
        memcpy(dgst_buf + buflen - dlen, dgst, dlen);
    } else {
        dgst_buf = (unsigned char *)dgst;
    }

    if (kinv == NULL || r == NULL) {
        /* Get random k */
        do {
#ifndef QAT_BORINGSSL
            if (!BN_priv_rand_range(k, order)) {
#else /* QAT_BORINGSSL */
            if (!BN_rand_range(k, order)) {
#endif /* QAT_BORINGSSL */
                mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
                WARN("Failure in BN_priv_rand_range\n");
                QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_RAND_GENERATE_FAILURE);
                goto err;
            }
        } while (BN_is_zero(k));
    } else {
        BN_mod_inverse(k, kinv, order, ctx);
        DEBUG("Not Generating Random K\n");
    }
#ifdef QAT_BORINGSSL
    waitctx = ASYNC_get_wait_ctx(job);
    if (!waitctx) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("waitctx == NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_CTX_NULL);
        goto err;
    }

    sig = OPENSSL_zalloc(ECDSA_size(eckey));
    if (!sig) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("Failure to allocate sig buf\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_MALLOC_FAILURE);
        goto err;
    }
    alloc_sig = 1;
    if (!alloc_buf) {
        dgst_buf = OPENSSL_zalloc(dlen);
        if (!dgst_buf) {
            mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
            WARN("Failure to allocate dgst buf\n");
            QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_MALLOC_FAILURE);
            goto err;
        }
        alloc_buf = 1;
        memcpy(dgst_buf, dgst, dlen);
    }

    ecdsa_async_ctx = OPENSSL_zalloc(sizeof(mb_ecdsa_async_ctx));
    if (!ecdsa_async_ctx) {
        mb_flist_ecdsa_sign_push(tlv->ecdsa_sign_freelist, ecdsa_sign_req);
        WARN("Failure to allocate ecdsa_async_ctx\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_MALLOC_FAILURE);
        goto err;
    }
    ecdsa_async_ctx->async_ctx.callback_func = mb_ecdsa_sign_callback_fn;
    ecdsa_async_ctx->async_ctx.ctx = ecdsa_async_ctx;
    ecdsa_async_ctx->dgst = dgst_buf;
    ecdsa_async_ctx->dlen = dlen;
    ecdsa_async_ctx->ctx = ctx;
    ecdsa_async_ctx->s = s;
    ecdsa_async_ctx->sig = sig;
    ecdsa_async_ctx->ecdsa_sig_r = ecdsa_sig_r;
    ecdsa_async_ctx->ecdsa_sig_s = ecdsa_sig_s;
    ecdsa_async_ctx->buflen = buflen;
    ecdsa_sign_req->sts = &(ecdsa_async_ctx->sts);
    waitctx->data = &(ecdsa_async_ctx->async_ctx);
#else /* QAT_BORINGSSL */
    ecdsa_sign_req->sts = &sts;
#endif/* QAT_BORINGSSL */
    ecdsa_sign_req->sign_r = sig;
    ecdsa_sign_req->sign_s = sig + buflen;
    ecdsa_sign_req->digest = dgst_buf;
    ecdsa_sign_req->eph_key = k;
    ecdsa_sign_req->priv_key = priv_key;
    ecdsa_sign_req->job = job;

    switch (bit_len) {
    case EC_P256:
        mb_queue_ecdsap256_sign_enqueue(tlv->ecdsap256_sign_queue, ecdsa_sign_req);
        break;
    case EC_P384:
        mb_queue_ecdsap384_sign_enqueue(tlv->ecdsap384_sign_queue, ecdsa_sign_req);
        break;
    }
    STOP_RDTSC(&ecdsa_cycles_sign_setup, 1, "[ECDSA:sign_setup]");

#ifdef ENABLE_QAT_FIPS
    if (job == NULL)
        process_ecdsa_sign_reqs(tlv, bit_len);
#endif

    if (!enable_external_polling && (++req_num % MULTIBUFF_MAX_BATCH) == 0) {
        DEBUG("Signal Polling thread, req_num %d\n", req_num);
        if (sem_post(&tlv->mb_polling_thread_sem) != 0) {
            WARN("hw sem_post failed!, mb_polling_thread_sem address: %p.\n",
                  &tlv->mb_polling_thread_sem);
            /* If we fail the pthread_kill carry on as the timeout
             * will catch processing the request in the polling thread */
        }
    }
#ifdef QAT_BORINGSSL
    job->tlv_destructor(NULL);
    return -1;
#endif
#ifndef QAT_BORINGSSL
    DEBUG("Pausing: %p status = %d\n", ecdsa_sign_req, sts);
#ifdef ENABLE_QAT_FIPS
    if (job != NULL) {
#endif
        do {
            /* 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(job, ASYNC_STATUS_OK)) == 0)
                 sched_yield();
        } while (QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

        DEBUG("Finished: %p status = %d\n", ecdsa_sign_req, sts);
#ifdef ENABLE_QAT_FIPS
    }
#endif

    if (sts) {
        /* Convert the buffers to BN */
        BN_bin2bn(sig, buflen, ecdsa_sig_r);
        BN_bin2bn(sig + buflen, buflen, ecdsa_sig_s);

        *siglen = i2d_ECDSA_SIG(s, &sig);
        DEBUG("siglen %d, dlen %d\n", *siglen, dlen);
        ECDSA_SIG_free(s);
        ret = 1;
    } else {
        WARN("Failure in ECDSA Sign\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_ECDSA_SIGN_FAILURE);
        goto err;
    }
#endif /* QAT_BORINGSSL */

err:
    if (!ret) {
        ECDSA_SIG_free(s);
        if (siglen != NULL)
            *siglen = 0;
    }

    if (alloc_buf)
        OPENSSL_free(dgst_buf);

    if (ctx) {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
    }
#ifdef QAT_BORINGSSL
    if (alloc_sig) {
        OPENSSL_free(sig);
    }
#endif /* QAT_BORINGSSL */
    return ret;

use_sw_method:
# ifndef QAT_BORINGSSL
    EC_KEY_METHOD_get_sign((EC_KEY_METHOD *) EC_KEY_OpenSSL(),
                            &sign_pfunc, NULL, NULL);
    if (sign_pfunc == NULL) {
        WARN("sign_pfunc is NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN, QAT_R_SW_GET_SIGN_PFUNC_NULL);
        return ret;
    }

    return (*sign_pfunc)(type, dgst, dlen, sig, siglen, kinv, r, eckey);
# else /* QAT_BORINGSSL */
    ret = bssl_ecdsa_sign(dgst, dlen, sig, siglen, eckey);
    if ((job = ASYNC_get_current_job())) {
        job->tlv_destructor(NULL);
        waitctx = ASYNC_get_wait_ctx(job);
        if (waitctx && siglen && ret == 1) {
            waitctx->data = (void *)(long long)(*siglen);
            bssl_mb_async_job_finish_wait(job, ASYNC_JOB_OPER_COMPLETE,
                ASYNC_STATUS_OK);
        } else {
            bssl_mb_async_job_finish_wait(job, ASYNC_JOB_STOPPED,
                ASYNC_STATUS_OK);
        }
    }
    return ret;
# endif /* QAT_BORINGSSL */
}

#ifndef QAT_BORINGSSL
int mb_ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in,
                        BIGNUM **kinvp, BIGNUM **rp)
{
    int ret = 0, job_ret = 0, sts = 0, bit_len = 0;
    const EC_GROUP *group;
    const BIGNUM *priv_key;
    ASYNC_JOB *job;
    static __thread int req_num = 0;
    BIGNUM *k = NULL, *r = NULL;
    PFUNC_SIGN_SETUP sign_setup_pfunc = NULL;
    ecdsa_sign_setup_op_data *ecdsa_sign_setup_req = NULL;
    mb_thread_data *tlv = NULL;

    DEBUG("Entering\n" );
    if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL
        || (priv_key = EC_KEY_get0_private_key(eckey)) == NULL) {
        WARN("eckey, group or priv_key is  NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SETUP, QAT_R_EC_KEY_GROUP_PRIV_KEY_NULL);
        return 0;
    }

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    /* Check if curve is p256 or p384 */
    if ((bit_len = mb_ec_check_curve(EC_GROUP_get_curve_name(group))) == 0) {
        DEBUG("Curve type not supported, using SW Method %d\n",
               EC_GROUP_get_curve_name(group));
        goto use_sw_method;
    } else if (bit_len == -1) {
        return ret;
    }

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
    }

    /* Setup asynchronous notifications */
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }

    if (!EC_KEY_can_sign(eckey)) {
        WARN("Curve doesn't support Signing\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SETUP, QAT_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
        return ret;
    }

    tlv = mb_check_thread_local();
    if (NULL == tlv) {
        WARN("Could not create thread local variables\n");
        goto use_sw_method;
    }

    while ((ecdsa_sign_setup_req =
            mb_flist_ecdsa_sign_setup_pop(tlv->ecdsa_sign_setup_freelist)) == NULL) {
        qat_wake_job(job, ASYNC_STATUS_EAGAIN);
        qat_pause_job(job, ASYNC_STATUS_EAGAIN);
    }

    DEBUG("QAT SW ECDSA Started %p\n", ecdsa_sign_setup_req);
    START_RDTSC(&ecdsa_cycles_sign_setup_setup);

    /* Buffer up the requests and call the new functions when we have enough
     * requests buffered up */

    k = BN_new();
    r = BN_new();
    if (k == NULL || r == NULL) {
        mb_flist_ecdsa_sign_setup_push(tlv->ecdsa_sign_setup_freelist, ecdsa_sign_setup_req);
        WARN("Failure to allocate k or r\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SETUP, QAT_R_ECDSA_MALLOC_FAILURE);
        goto err;
    }

    ecdsa_sign_setup_req->k_inv = k;
    ecdsa_sign_setup_req->sig_rp = r;
    ecdsa_sign_setup_req->eph_key = priv_key;
    ecdsa_sign_setup_req->job = job;
    ecdsa_sign_setup_req->sts = &sts;

    switch (bit_len) {
    case EC_P256:
        mb_queue_ecdsap256_sign_setup_enqueue(tlv->ecdsap256_sign_setup_queue, ecdsa_sign_setup_req);
        break;
    case EC_P384:
        mb_queue_ecdsap384_sign_setup_enqueue(tlv->ecdsap384_sign_setup_queue, ecdsa_sign_setup_req);
        break;
    }
    STOP_RDTSC(&ecdsa_cycles_sign_setup_setup, 1, "[ECDSA:sign_setup_setup]");

    if (!enable_external_polling && (++req_num % MULTIBUFF_MAX_BATCH) == 0) {
        DEBUG("Signal Polling thread, req_num %d\n", req_num);
        if (sem_post(&tlv->mb_polling_thread_sem) != 0) {
            WARN("hw sem_post failed!, mb_polling_thread_sem address: %p.\n",
                  &tlv->mb_polling_thread_sem);
            /* If we fail the pthread_kill carry on as the timeout
             * will catch processing the request in the polling thread */
        }
    }

    DEBUG("Pausing: %p status = %d\n", ecdsa_sign_setup_req, sts);
    do {
        /* 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(job, ASYNC_STATUS_OK)) == 0)
            sched_yield();
    } while (QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

    DEBUG("Finished: %p status = %d\n", ecdsa_sign_setup_req, sts);

    /* Clear old values */
    BN_clear_free(*rp);
    BN_clear_free(*kinvp);

    if (sts) {
        /* Save the pre-computed values  */
        *rp = r;
        *kinvp = k;
        ret = 1;
    } else {
        WARN("Failure in ECDSA Sign\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SETUP, QAT_R_ECDSA_SIGN_FAILURE);
        goto err;
    }
    return ret;

err:
    if (!ret) {
        BN_clear_free(k);
        BN_clear_free(r);
    }
    return ret;

use_sw_method:
    EC_KEY_METHOD_get_sign((EC_KEY_METHOD *) EC_KEY_OpenSSL(),
                            NULL, &sign_setup_pfunc, NULL);
    if (sign_setup_pfunc == NULL) {
        WARN("sign_setup_pfunc is NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SETUP, QAT_R_SW_GET_SIGN_SETUP_PFUNC_NULL);
        return ret;
    }

    return (*sign_setup_pfunc)(eckey, ctx_in, kinvp, rp);
}

ECDSA_SIG *mb_ecdsa_sign_sig(const unsigned char *dgst, int dlen,
                             const BIGNUM *in_kinv, const BIGNUM *in_r,
                             EC_KEY *eckey)
{
    int ok = 0, len = 0, job_ret = 0, sts = 0, alloc_buf = 0,  bit_len = 0;
    BN_CTX *ctx = NULL;
    ECDSA_SIG *ret;
    ASYNC_JOB *job;
    size_t buflen;
    static __thread int req_num = 0;
    const EC_GROUP *group;
    const BIGNUM *priv_key, *order;
    const EC_POINT *pub_key = NULL;
    unsigned char *sig_buf = NULL, *dgst_buf = NULL;
    BIGNUM *ecdsa_sig_r = NULL, *ecdsa_sig_s = NULL;
    BIGNUM *kinv = NULL, *rp = NULL;
    PFUNC_SIGN_SIG sign_sig_pfunc = NULL;
    ecdsa_sign_sig_op_data *ecdsa_sign_sig_req = NULL;
    mb_thread_data *tlv = NULL;

    DEBUG("Entering\n" );
    if (unlikely(dgst == NULL || dlen <= 0 ||
                 eckey == NULL)) {
        WARN("Invalid Input param\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_INPUT_PARAM_INVALID);
        return NULL;
    }

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    group = EC_KEY_get0_group(eckey);
    priv_key = EC_KEY_get0_private_key(eckey);
    pub_key = EC_KEY_get0_public_key(eckey);

    if (group == NULL || priv_key == NULL || pub_key == NULL) {
        WARN("Either group, priv_key or pub_key are NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_GROUP_PRIV_KEY_PUB_KEY_NULL);
        return NULL;
    }

    /* Check if curve is p256 or p384 */
    if ((bit_len = mb_ec_check_curve(EC_GROUP_get_curve_name(group))) == 0) {
        DEBUG("Curve type not supported, using SW Method %d\n",
               EC_GROUP_get_curve_name(group));
        goto use_sw_method;
    } else if (bit_len == -1) {
        return ret;
    }

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
    }

    /* Setup asynchronous notifications */
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }

    if (!EC_KEY_can_sign(eckey)) {
        WARN("Curve doesn't support Signing\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
        return NULL;
    }

    tlv = mb_check_thread_local();
    if (NULL == tlv) {
        WARN("Could not create thread local variables\n");
        goto use_sw_method;
    }

    while ((ecdsa_sign_sig_req =
            mb_flist_ecdsa_sign_sig_pop(tlv->ecdsa_sign_sig_freelist)) == NULL) {
        qat_wake_job(job, ASYNC_STATUS_EAGAIN);
        qat_pause_job(job, ASYNC_STATUS_EAGAIN);
    }

    DEBUG("QAT SW ECDSA Started %p\n", ecdsa_sign_sig_req);
    START_RDTSC(&ecdsa_cycles_sign_sig_setup);

    /* Buffer up the requests and call the new functions when we have enough
     * requests buffered up */

    ret = ECDSA_SIG_new();
    if (ret == NULL) {
        mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
        WARN("Failure to allocate sig\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_MALLOC_FAILURE);
        return NULL;
    }

    ecdsa_sig_r = BN_new();
    ecdsa_sig_s = BN_new();

    /* NULL checking of ecdsa_sig_r & ecdsa_sig_s done in ECDSA_SIG_set0() */
    if (ECDSA_SIG_set0(ret, ecdsa_sig_r, ecdsa_sig_s) == 0) {
        mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
        WARN("Failure to allocate r and s values to assign to the ECDSA_SIG\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_ECDSA_SIG_SET_R_S_FAILURE);
        goto err;
    }

    if ((ctx = BN_CTX_new()) == NULL) {
        mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
        WARN("Failure to allocate ctx\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_CTX_MALLOC_FAILURE);
        goto err;
    }

    BN_CTX_start(ctx);
    if ((order = EC_GROUP_get0_order(group)) ==  NULL) {
        mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
        WARN("Failure to get order from group\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_GET_ORDER_FAILURE);
        goto err;
    }

    len = BN_num_bits(order);
    buflen = (len + 7) / 8;

    /* If digest size is less, expand length with zero as crypto_mb
     * expects digest being sign length */
    if (8 * dlen < len) {
        dgst_buf = OPENSSL_zalloc(buflen);
        if (dgst_buf == NULL) {
            mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
            WARN("Failure to allocate dgst_buf\n");
            QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_ECDSA_MALLOC_FAILURE);
            goto err;
        }
        alloc_buf = 1;
        memcpy(dgst_buf + buflen - dlen, dgst, dlen);
    } else {
        dgst_buf = (unsigned char *)dgst;
    }

    if (in_kinv == NULL || in_r == NULL) {
        if (!ECDSA_sign_setup(eckey, ctx, &kinv, &rp)) {
            mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
            WARN("Failure in sign setup\n");
            QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_ECDSA_SIGN_SETUP_FAILURE);
            goto err;
        }
        in_kinv = kinv;
        in_r = rp;
    }

    sig_buf = OPENSSL_malloc(buflen + buflen);
    if (sig_buf == NULL) {
        mb_flist_ecdsa_sign_sig_push(tlv->ecdsa_sign_sig_freelist, ecdsa_sign_sig_req);
        WARN("Failure to allocate sig_buf\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_ECDSA_MALLOC_FAILURE);
        goto err;
    }

    ecdsa_sign_sig_req->sign_r = sig_buf;
    ecdsa_sign_sig_req->sign_s = sig_buf + buflen;
    ecdsa_sign_sig_req->digest = dgst_buf;
    ecdsa_sign_sig_req->sig_rp = in_r;
    ecdsa_sign_sig_req->k_inv = in_kinv;
    ecdsa_sign_sig_req->priv_key = priv_key;
    ecdsa_sign_sig_req->job = job;
    ecdsa_sign_sig_req->sts = &sts;

    switch (bit_len) {
    case EC_P256:
        mb_queue_ecdsap256_sign_sig_enqueue(tlv->ecdsap256_sign_sig_queue, ecdsa_sign_sig_req);
        break;
    case EC_P384:
        mb_queue_ecdsap384_sign_sig_enqueue(tlv->ecdsap384_sign_sig_queue, ecdsa_sign_sig_req);
        break;
    }
    STOP_RDTSC(&ecdsa_cycles_sign_sig_setup, 1, "[ECDSA:sign_sig_setup]");

    if (!enable_external_polling && (++req_num % MULTIBUFF_MAX_BATCH) == 0) {
        DEBUG("Signal Polling thread, req_num %d\n", req_num);
        if (sem_post(&tlv->mb_polling_thread_sem) != 0) {
            WARN("hw sem_post failed!, mb_polling_thread_sem address: %p.\n",
                  &tlv->mb_polling_thread_sem);
            /* If we fail the pthread_kill carry on as the timeout
             * will catch processing the request in the polling thread */
        }
    }

    DEBUG("Pausing: %p status = %d\n", ecdsa_sign_sig_req, sts);
    do {
        /* 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(job, ASYNC_STATUS_OK)) == 0)
            sched_yield();
    } while (QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

    DEBUG("Finished: %p status = %d\n", ecdsa_sign_sig_req, sts);

    /* Convert the buffers to BN */
    BN_bin2bn(sig_buf, buflen, ecdsa_sig_r);
    BN_bin2bn(sig_buf + buflen, buflen, ecdsa_sig_s);
    ok = 1;

err:
    if (!ok) {
        ECDSA_SIG_free(ret);
        ret = NULL;
    }

    if (sig_buf)
        OPENSSL_free(sig_buf);

    if (alloc_buf)
        OPENSSL_free(dgst_buf);

    if (ctx != NULL) {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
    }

    return ret;

use_sw_method:
    EC_KEY_METHOD_get_sign((EC_KEY_METHOD *) EC_KEY_OpenSSL(),
                            NULL, NULL, &sign_sig_pfunc);
    if (sign_sig_pfunc == NULL) {
        WARN("sign_sig_pfunc is NULL\n");
        QATerr(QAT_F_MB_ECDSA_SIGN_SIG, QAT_R_SW_GET_SIGN_SIG_PFUNC_NULL);
        return NULL;
    }

    return (*sign_sig_pfunc)(dgst, dlen, in_kinv, in_r, eckey);
}

#else /* QAT_BORINGSSL */
int mb_ecdsa_sign_bssl(const uint8_t *digest, size_t digest_len, uint8_t *sig,
                        unsigned int *sig_len, EC_KEY *eckey)
{
    int type = 0;
    const EC_GROUP *ecgroup = NULL;

    if (eckey && (ecgroup  = EC_KEY_get0_group(eckey))) {
        type = EC_GROUP_get_curve_name(ecgroup);
    }
 
    return mb_ecdsa_sign(type, digest, digest_len, sig, sig_len, NULL, NULL, eckey);
}
#endif /* QAT_BORINGSSL */
#endif

#ifdef ENABLE_QAT_SW_ECDSA
# ifndef QAT_BORINGSSL
int mb_ecdsa_verify(int type, const unsigned char *dgst,
                    int dgst_len, const unsigned char *sigbuf,
                    int sig_len, EC_KEY *eckey)
{
    ECDSA_SIG *s;
    const unsigned char *p = sigbuf;
    unsigned char *der = NULL;
    int derlen = -1;
    int ret = -1;
    ASYNC_JOB *job;
    PFUNC_VERIFY verify_pfunc = NULL;

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
#ifndef ENABLE_QAT_FIPS
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
#endif
    }

    /* Setup asynchronous notifications */
#ifdef ENABLE_QAT_FIPS
    if (job != NULL && !qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications.\n");
        return ret;
    }
#else
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }
#endif

    if ((s = ECDSA_SIG_new()) == NULL) {
        WARN("Failure to allocate ECDSA_SIG\n");
        return ret;
    }

    if (d2i_ECDSA_SIG(&s, &p, sig_len) == NULL) {
        WARN("Failure to get ECDSA_SIG\n");
        goto err;
    }

    /* Ensure signature uses DER and doesn't have trailing garbage */
    derlen = i2d_ECDSA_SIG(s, &der);
    if (derlen != sig_len || memcmp(sigbuf, der, derlen) != 0) {
        WARN("Failure to get ECDSA_SIG\n");
        goto err;
    }

    ret = mb_ecdsa_do_verify(dgst, dgst_len, s, eckey);
 err:
    OPENSSL_free(der);
    ECDSA_SIG_free(s);
    return ret;

use_sw_method:
    EC_KEY_METHOD_get_verify((EC_KEY_METHOD *) EC_KEY_OpenSSL(),
                            &verify_pfunc, NULL);
    if (verify_pfunc == NULL) {
        WARN("verify_pfunc is NULL\n");
        QATerr(QAT_F_MB_ECDSA_VERIFY, QAT_R_SW_GET_VERIFY_PFUNC_NULL);
        return ret;
    }

    return (*verify_pfunc)(type, dgst, dgst_len, sigbuf, sig_len, eckey);
}

int mb_ecdsa_do_verify(const unsigned char *dgst,
                    int dlen, const ECDSA_SIG *sig,
                    EC_KEY *eckey)
{
    int ret = -1, len = 0, job_ret = 0, sts = 0, alloc_buf = 0, bit_len = 0;
    BN_CTX *ctx = NULL;
    ASYNC_JOB *job;
    size_t buflen;
    static __thread int req_num = 0;
    const EC_GROUP *group;
    const BIGNUM *order;
    const EC_POINT *pub_key = NULL;
    unsigned char *dgst_buf = NULL;
    PFUNC_VERIFY_SIG verify_sig_pfunc = NULL;
    ecdsa_verify_op_data *ecdsa_verify_req = NULL;
    mb_thread_data *tlv = NULL;
    BIGNUM *x = NULL, *y = NULL, *z = NULL;

    DEBUG("Entering \n");
#ifdef ENABLE_QAT_FIPS
    qat_fips_get_approved_status();
#endif
    if (unlikely(dgst == NULL || dlen <= 0 ||
                 eckey == NULL)) {
        WARN("Invalid Input param\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_INPUT_PARAM_INVALID);
        return ret;
    }

    group = EC_KEY_get0_group(eckey);
    pub_key = EC_KEY_get0_public_key(eckey);

    if (group == NULL || pub_key == NULL) {
        WARN("Either group, priv_key or pub_key are NULL\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_GROUP_PUB_KEY_NULL);
        return ret;
    }

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    /* Check if curve is p256 or p384 */
    if ((bit_len = mb_ec_check_curve(EC_GROUP_get_curve_name(group))) == 0) {
        DEBUG("Curve type not supported, using SW Method %d\n",
               EC_GROUP_get_curve_name(group));
#ifdef ENABLE_QAT_FIPS
        return ret;
#else
        goto use_sw_method;
#endif
    } else if (bit_len == -1) {
        return ret;
    }

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
#ifndef ENABLE_QAT_FIPS
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
#endif
    }

    /* Setup asynchronous notifications */
#ifdef ENABLE_QAT_FIPS
    if (job != NULL && !qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications.\n");
        return sts;
    }
#else
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }
#endif

    if (!EC_KEY_can_sign(eckey)) {
        WARN("Curve doesn't support Signing\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
        return ret;
    }

    tlv = mb_check_thread_local();
    if (NULL == tlv) {
        WARN("Could not create thread local variables\n");
#ifdef ENABLE_QAT_FIPS
        return ret;
#else
        goto use_sw_method;
#endif
    }

    while ((ecdsa_verify_req =
            mb_flist_ecdsa_verify_pop(tlv->ecdsa_verify_freelist)) == NULL) {
# ifndef ENABLE_QAT_FIPS
        qat_wake_job(job, ASYNC_STATUS_EAGAIN);
        qat_pause_job(job, ASYNC_STATUS_EAGAIN);
# else
        if (job != NULL) {
            qat_wake_job(job, ASYNC_STATUS_EAGAIN);
            qat_pause_job(job, ASYNC_STATUS_EAGAIN);
        }
# endif
    }

    DEBUG("QAT SW ECDSA Verify Started %p\n", ecdsa_verify_req);
    START_RDTSC(&ecdsa_cycles_verify_setup);

    if ((ctx = BN_CTX_new()) == NULL) {
        mb_flist_ecdsa_verify_push(tlv->ecdsa_verify_freelist, ecdsa_verify_req);
        WARN("Failure to allocate ctx\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_CTX_MALLOC_FAILURE);
        goto err;
    }

    BN_CTX_start(ctx);
    x = BN_CTX_get(ctx);
    y = BN_CTX_get(ctx);
    z = BN_CTX_get(ctx);

    if (x == NULL || y == NULL || z == NULL) {
        mb_flist_ecdsa_verify_push(tlv->ecdsa_verify_freelist, ecdsa_verify_req);
        WARN("Failed to allocate x or y or z\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_X_Y_Z_MALLOC_FAILURE);
        goto err;
    }

    if (!EC_POINT_get_Jprojective_coordinates_GFp(group, pub_key, x, y, z,ctx)) {
        mb_flist_ecdsa_verify_push(tlv->ecdsa_verify_freelist, ecdsa_verify_req);
        WARN("Failure to get the Jacobian coordinates for public Key\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_INTERNAL_ERROR);
        goto err;
    }

    if ((order = EC_GROUP_get0_order(group)) ==  NULL) {
        mb_flist_ecdsa_verify_push(tlv->ecdsa_verify_freelist, ecdsa_verify_req);
        WARN("Failure to get order from group\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_GET_ORDER_FAILURE);
        goto err;
    }

    len = BN_num_bits(order);
    buflen = (len + 7) / 8;

    /* If digest size is less, expand length with zero as crypto_mb
     * expects digest being sign length */
    if (8 * dlen < len) {
        dgst_buf = OPENSSL_zalloc(buflen);
        if (dgst_buf == NULL) {
            mb_flist_ecdsa_verify_push(tlv->ecdsa_verify_freelist, ecdsa_verify_req);
            WARN("Failure to allocate dgst_buf\n");
            QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_ECDSA_MALLOC_FAILURE);
            goto err;
        }
        alloc_buf = 1;
        memcpy(dgst_buf + buflen - dlen, dgst, dlen);
    } else {
        dgst_buf = (unsigned char *)dgst;
    }

    ecdsa_verify_req->sts = &sts;
    ecdsa_verify_req->s = sig;
    ecdsa_verify_req->x = x;
    ecdsa_verify_req->y = y;
    ecdsa_verify_req->z = z;
    ecdsa_verify_req->digest = dgst_buf;
    ecdsa_verify_req->job = job;

    switch (bit_len) {
    case EC_P256:
        mb_queue_ecdsap256_verify_enqueue(tlv->ecdsap256_verify_queue, ecdsa_verify_req);
        break;
    case EC_P384:
        mb_queue_ecdsap384_verify_enqueue(tlv->ecdsap384_verify_queue, ecdsa_verify_req);
        break;
    }
    STOP_RDTSC(&ecdsa_cycles_verify_setup, 1, "[ECDSA:verify_setup]");
#ifdef ENABLE_QAT_FIPS
    if (job == NULL)
        process_ecdsa_verify_reqs(tlv, bit_len);
#endif

    if (!enable_external_polling && (++req_num % MULTIBUFF_MAX_BATCH) == 0) {
        DEBUG("Signal Polling thread, req_num %d\n", req_num);
        if (sem_post(&tlv->mb_polling_thread_sem) != 0) {
            WARN("hw sem_post failed!, mb_polling_thread_sem address: %p.\n",
                  &tlv->mb_polling_thread_sem);
            /* If we fail the pthread_kill carry on as the timeout
             * will catch processing the request in the polling thread */
        }
    }
    DEBUG("Pausing: %p status = %d\n", ecdsa_verify_req, sts);

#ifdef ENABLE_QAT_FIPS
    if (job != NULL) {
#endif
        do {
            /* 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(job, ASYNC_STATUS_OK)) == 0)
                sched_yield();
        } while (QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

        DEBUG("Finished: %p status = %d\n", ecdsa_verify_req, sts);
#ifdef ENABLE_QAT_FIPS
    }
#endif

    if (sts) {
        ret = 1;

        if (alloc_buf)
            OPENSSL_free(dgst_buf);
    } else {
        WARN("Failure in ECDSA Verify\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_ECDSA_VERIFY_FAILURE);
        goto err;
    }

err:
    if (ctx) {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
    }

    return ret;

use_sw_method:
    EC_KEY_METHOD_get_verify((EC_KEY_METHOD *) EC_KEY_OpenSSL(),
                            NULL, &verify_sig_pfunc);
    if (verify_sig_pfunc == NULL) {
        WARN("verify_sig_pfunc is NULL\n");
        QATerr(QAT_F_MB_ECDSA_DO_VERIFY, QAT_R_SW_GET_VERIFY_PFUNC_NULL);
        return ret;
    }

    return (*verify_sig_pfunc)(dgst, dlen, sig, eckey);
}
# endif /* QAT_BORINGSSL */
#endif /* ENABLE_QAT_SW_ECDSA */

#ifdef ENABLE_QAT_SW_ECDH
int mb_ecdh_generate_key(EC_KEY *ecdh)
{
    BN_CTX *ctx = NULL;
    const EC_GROUP *group;
    EC_POINT *pub_key = NULL;
    BIGNUM *priv_key = NULL;
    const BIGNUM *order;
    BIGNUM *x = NULL, *y = NULL, *z = NULL;
    int ret = 0, job_ret = 0, sts = 0, curve = 0;
    int alloc_priv = 0, alloc_pub = 0;
    PFUNC_GEN_KEY gen_key_pfunc = NULL;
    ecdh_keygen_op_data *ecdh_keygen_req = NULL;
    ASYNC_JOB *job;
    static __thread int req_num = 0;
    mb_thread_data *tlv = NULL;

    if (unlikely(ecdh == NULL || ((group = EC_KEY_get0_group(ecdh)) == NULL))) {
        WARN("Either ecdh or group are NULL\n");
        QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_ECDH_GROUP_NULL);
        return ret;
    }

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    /* Check if curve is p256 or p384 or sm2*/
    if ((curve = mb_ec_check_curve(EC_GROUP_get_curve_name(group))) == 0) {
        DEBUG("Curve type not supported, using SW Method %d\n",
               EC_GROUP_get_curve_name(group));
        goto use_sw_method;
    } else if (curve == -1) {
        return ret;
    }

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
    }

    /* Setup asynchronous notifications */
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }

    tlv = mb_check_thread_local();
    if (NULL == tlv) {
        WARN("Could not create thread local variables\n");
        goto use_sw_method;
    }

    while ((ecdh_keygen_req =
            mb_flist_ecdh_keygen_pop(tlv->ecdh_keygen_freelist)) == NULL) {
        qat_wake_job(job, ASYNC_STATUS_EAGAIN);
        qat_pause_job(job, ASYNC_STATUS_EAGAIN);
    }

    DEBUG("QAT SW ECDH Started  %p\n", ecdh_keygen_req);
    START_RDTSC(&ecdh_cycles_keygen_setup);

    if ((ctx = BN_CTX_new()) == NULL) {
        mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
        WARN("Failure to allocate ctx\n");
        QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_CTX_MALLOC_FAILURE);
        goto err;
    }

    BN_CTX_start(ctx);
    if ((order = EC_GROUP_get0_order(group)) ==  NULL) {
        mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
        WARN("Failure to retrieve order\n");
        QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_GET_ORDER_FAILURE);
        goto err;
    }

    if ((priv_key = (BIGNUM *)EC_KEY_get0_private_key(ecdh)) == NULL) {
        priv_key = BN_new();
        if (priv_key == NULL) {
            mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
            WARN("Failure to get priv_key\n");
            QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_GET_PRIV_KEY_FAILURE);
            goto err;
        }
        alloc_priv = 1;
    }

    do {
        if (!BN_priv_rand_range(priv_key, order)) {
            mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
            WARN("Failure to generate random value\n");
            QATerr(QAT_F_MB_ECDH_GENERATE_KEY,
                   QAT_R_PRIV_KEY_RAND_GENERATE_FAILURE);
            goto err;
        }
    } while (BN_is_zero(priv_key)) ;

    if (alloc_priv) {
        if (!EC_KEY_set_private_key(ecdh, priv_key)) {
            mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
            WARN("Failure to set private key\n");
            QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_SET_PRIV_KEY_FAILURE);
            goto err;
        }
    }

    if ((pub_key = (EC_POINT *)EC_KEY_get0_public_key(ecdh)) == NULL) {
        pub_key = EC_POINT_new(group);
        if (pub_key == NULL) {
            mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
            WARN("Failure to allocate pub_key\n");
            QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_PUB_KEY_MALLOC_FAILURE);
            goto err;
        }
        alloc_pub = 1;
    }

    x = BN_CTX_get(ctx);
    y = BN_CTX_get(ctx);
    z = BN_CTX_get(ctx);

    if (x == NULL || y == NULL || z == NULL) {
        mb_flist_ecdh_keygen_push(tlv->ecdh_keygen_freelist, ecdh_keygen_req);
        WARN("Failed to allocate x or y or z\n");
        QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_X_Y_Z_MALLOC_FAILURE);
        goto err;
    }

    ecdh_keygen_req->x = x;
    ecdh_keygen_req->y = y;
    ecdh_keygen_req->z = z;
    ecdh_keygen_req->priv_key = priv_key;
    ecdh_keygen_req->job = job;
    ecdh_keygen_req->sts = &sts;

    switch (curve) {
    case EC_P256:
        mb_queue_ecdhp256_keygen_enqueue(tlv->ecdhp256_keygen_queue, ecdh_keygen_req);
        break;
    case EC_P384:
        mb_queue_ecdhp384_keygen_enqueue(tlv->ecdhp384_keygen_queue, ecdh_keygen_req);
        break;
    case EC_SM2:
        mb_queue_sm2ecdh_keygen_enqueue(tlv->sm2ecdh_keygen_queue, ecdh_keygen_req);
        break;
    }
    STOP_RDTSC(&ecdh_cycles_keygen_setup, 1, "[ECDH:keygen_setup]");

    if (!enable_external_polling && (++req_num % MULTIBUFF_MAX_BATCH) == 0) {
        DEBUG("Signal Polling thread, req_num %d\n", req_num);
        if (sem_post(&tlv->mb_polling_thread_sem) != 0) {
            WARN("hw sem_post failed!, mb_polling_thread_sem address: %p.\n",
                  &tlv->mb_polling_thread_sem);
            /* If we fail the pthread_kill carry on as the timeout
             * will catch processing the request in the polling thread */
        }
    }

    DEBUG("Pausing: %p status = %d\n", ecdh_keygen_req, sts);
    do {
        /* 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(job, ASYNC_STATUS_OK)) == 0)
            sched_yield();
    } while (QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

    DEBUG("Finished: %p status = %d\n", ecdh_keygen_req, sts);

    if (!EC_POINT_set_Jprojective_coordinates_GFp(group, pub_key, x, y, z, ctx)) {
       WARN("Failure to set the Jacobian coordinates for public Key\n");
       goto err;
    }

    if (sts) {
        if (!EC_KEY_set_public_key(ecdh, pub_key)) {
            WARN("Error setting pub_key\n");
            QATerr(QAT_F_MB_ECDH_GENERATE_KEY, ERR_R_INTERNAL_ERROR);
            goto err;
        }
        ret = 1;
    } else {
        WARN("Failure in Keygen\n");
        QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_KEYGEN_FAILURE);
        goto err;
    }

err:
    if (alloc_pub)
        EC_POINT_free(pub_key);
    if (alloc_priv)
        BN_clear_free(priv_key);
    if (ctx != NULL) {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
    }
    return ret;

use_sw_method:
    EC_KEY_METHOD_get_keygen((EC_KEY_METHOD *) EC_KEY_OpenSSL(), &gen_key_pfunc);
    if (gen_key_pfunc == NULL) {
        WARN("get keygen failed\n");
        QATerr(QAT_F_MB_ECDH_GENERATE_KEY, QAT_R_SW_GET_KEYGEN_PFUNC_NULL);
        return ret;
    } else {
        return (*gen_key_pfunc)(ecdh);
    }
}

int mb_ecdh_compute_key(unsigned char **out,
                        size_t *outlen,
                        const EC_POINT *pub_key,
                        const EC_KEY *ecdh)
{
    BN_CTX *ctx;
    const BIGNUM *priv_key;
    const EC_GROUP *group;
    unsigned char *buf = NULL;
    int ret = 0,job_ret = 0, sts = 0, curve = 0;
    BIGNUM *x = NULL, *y = NULL, *z = NULL;
    PFUNC_COMP_KEY comp_key_pfunc = NULL;
    ecdh_compute_op_data *ecdh_compute_req = NULL;
    ASYNC_JOB *job;
    size_t buflen;
    static __thread int req_num = 0;
    mb_thread_data *tlv = NULL;

#ifdef ENABLE_QAT_FIPS
    qat_fips_get_approved_status();
#endif

    if (unlikely(ecdh == NULL || pub_key == NULL ||
                ((priv_key = EC_KEY_get0_private_key(ecdh)) == NULL) ||
                ((group = EC_KEY_get0_group(ecdh)) == NULL))) {
        WARN("Either ecdh or pub_key or priv_key or group is NULL\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, QAT_R_ECDH_PRIV_KEY_PUB_KEY_NULL);
        return ret;
    }

    /* QAT SW initialization fail, switching to OpenSSL. */
    if (fallback_to_openssl)
        goto use_sw_method;

    /* Check if curve is p256 or p384 or sm2 */
    if ((curve = mb_ec_check_curve(EC_GROUP_get_curve_name(group))) == 0) {
        DEBUG("Curve type not supported, using SW Method %d\n",
               EC_GROUP_get_curve_name(group));
#ifdef ENABLE_QAT_FIPS
        return ret;
#else
        goto use_sw_method;
#endif
    } else if (curve == -1) {
        return ret;
    }

    /* Check if we are running asynchronously */
    if ((job = ASYNC_get_current_job()) == NULL) {
#ifndef ENABLE_QAT_FIPS
        DEBUG("Running synchronously using sw method\n");
        goto use_sw_method;
#endif
    }

    /* Setup asynchronous notifications */
#ifdef ENABLE_QAT_FIPS
    if (job != NULL && !qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications.\n");
        return sts;
    }
#else
    if (!qat_setup_async_event_notification(job)) {
        DEBUG("Failed to setup async notifications, using sw method\n");
        goto use_sw_method;
    }
#endif

    tlv = mb_check_thread_local();
    if (NULL == tlv) {
        WARN("Could not create thread local variables\n");
#ifdef ENABLE_QAT_FIPS
        return ret;
#else
        goto use_sw_method;
#endif
    }

    while ((ecdh_compute_req =
            mb_flist_ecdh_compute_pop(tlv->ecdh_compute_freelist)) == NULL) {
#ifndef ENABLE_QAT_FIPS
        qat_wake_job(job, ASYNC_STATUS_EAGAIN);
        qat_pause_job(job, ASYNC_STATUS_EAGAIN);
#else
        if (job != NULL) {
            qat_wake_job(job, ASYNC_STATUS_EAGAIN);
            qat_pause_job(job, ASYNC_STATUS_EAGAIN);
        }
#endif
    }

    DEBUG("QAT SW ECDH Started %p\n", ecdh_compute_req);
    START_RDTSC(&ecdh_cycles_compute_setup);

    if ((ctx = BN_CTX_new()) == NULL) {
        mb_flist_ecdh_compute_push(tlv->ecdh_compute_freelist, ecdh_compute_req);
        WARN("Failure to allocate ctx\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, QAT_R_CTX_MALLOC_FAILURE);
        goto err;
    }

    BN_CTX_start(ctx);
    x = BN_CTX_get(ctx);
    y = BN_CTX_get(ctx);
    z = BN_CTX_get(ctx);

    if (x == NULL || y == NULL || z == NULL) {
        mb_flist_ecdh_compute_push(tlv->ecdh_compute_freelist, ecdh_compute_req);
        WARN("Failed to allocate x or y or z\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, QAT_R_X_Y_Z_MALLOC_FAILURE);
        goto err;
    }

    buflen = (EC_GROUP_get_degree(group) + 7) / 8;

    if ((buf = OPENSSL_zalloc(buflen)) == NULL) {
        mb_flist_ecdh_compute_push(tlv->ecdh_compute_freelist, ecdh_compute_req);
        WARN("Failed to allocate buf\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (!EC_POINT_get_Jprojective_coordinates_GFp(group, pub_key, x, y, z,ctx)) {
        mb_flist_ecdh_compute_push(tlv->ecdh_compute_freelist, ecdh_compute_req);
        WARN("Failure to get the Jacobian coordinates for public Key\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, ERR_R_INTERNAL_ERROR);
        goto err;
    }

    ecdh_compute_req->shared_key = buf;
    ecdh_compute_req->priv_key = priv_key;
    ecdh_compute_req->x = x;
    ecdh_compute_req->y = y;
    ecdh_compute_req->z = z;
    ecdh_compute_req->job = job;
    ecdh_compute_req->sts = &sts;

    switch (curve) {
    case EC_P256:
        mb_queue_ecdhp256_compute_enqueue(tlv->ecdhp256_compute_queue, ecdh_compute_req);
        break;
    case EC_P384:
        mb_queue_ecdhp384_compute_enqueue(tlv->ecdhp384_compute_queue, ecdh_compute_req);
        break;
    case EC_SM2:
        mb_queue_sm2ecdh_compute_enqueue(tlv->sm2ecdh_compute_queue, ecdh_compute_req);
        break;
    }
    STOP_RDTSC(&ecdh_cycles_compute_setup, 1, "[ECDH:compute_setup]");

#ifdef ENABLE_QAT_FIPS
    if (job == NULL)
        process_ecdh_compute_reqs(tlv, curve);
#endif

    if (!enable_external_polling && (++req_num % MULTIBUFF_MAX_BATCH) == 0) {
        DEBUG("Signal Polling thread, req_num %d\n", req_num);
        if (sem_post(&tlv->mb_polling_thread_sem) != 0) {
            WARN("hw sem_post failed!, mb_polling_thread_sem address: %p.\n",
                  &tlv->mb_polling_thread_sem);
            /* If we fail the pthread_kill carry on as the timeout
             * will catch processing the request in the polling thread */
        }
    }

    DEBUG("Pausing: %p status = %d\n", ecdh_compute_req, sts);
#ifdef ENABLE_QAT_FIPS
    if (job != NULL) {
#endif
        do {
            /* 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(job, ASYNC_STATUS_OK)) == 0)
                sched_yield();
        } while (QAT_CHK_JOB_RESUMED_UNEXPECTEDLY(job_ret));

        DEBUG("Finished: %p status = %d\n", ecdh_compute_req, sts);
#ifdef ENABLE_QAT_FIPS
    }
#endif

    if (sts) {
        *out = buf;
        *outlen = buflen;
        buf = NULL;
        ret = 1;
    } else {
        WARN("Failure in compute key\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, QAT_R_COMPUTE_FAILURE);
        goto err;
    }

err:
    if (ctx != NULL) {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
        OPENSSL_free(buf);
    }
    return ret;

use_sw_method:
    EC_KEY_METHOD_get_compute_key((EC_KEY_METHOD *)EC_KEY_OpenSSL(), &comp_key_pfunc);
    if (comp_key_pfunc == NULL) {
        WARN("comp_key_pfunc is NULL\n");
        QATerr(QAT_F_MB_ECDH_COMPUTE_KEY, QAT_R_SW_GET_COMPUTE_KEY_PFUNC_NULL);
        return ret;
    }
    return (*comp_key_pfunc)(out, outlen, pub_key, ecdh);
}
#endif
