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/*****************************************************************************
 * @file qat_prf.h
 *
 * This file provides an interface of the PRF operations for an
 * OpenSSL engine
 *
 *****************************************************************************/

#ifndef QAT_HW_PRF_H
#define QAT_HW_PRF_H

#include <pthread.h>
#include <string.h>
#include <signal.h>
#include <stdarg.h>

#include "openssl/ossl_typ.h"
#include "openssl/kdf.h"
#include "openssl/evp.h"
#include "openssl/ssl.h"
#include "qat_evp.h"
#include "qat_utils.h"
#include "qat_hw_asym_common.h"
#include "e_qat.h"
#include "qat_hw_callback.h"
#include "qat_hw_polling.h"
#include "qat_events.h"

/* These limits are based on QuickAssist limits.
 * OpenSSL is more generous but better to restrict and fail
 * early on here if they are exceeded rather than later on
 * down in the driver.
 */
# ifdef ENABLE_QAT_HW_PRF
#  define QAT_TLS1_PRF_SECRET_MAXBUF 1024
#  define QAT_TLS1_PRF_SEED_MAXBUF 64
#  define QAT_TLS1_PRF_LABEL_MAXBUF 136

/* QAT TLS  pkey context structure */
typedef struct {
    /* Buffer of concatenated seeds from seed2 to seed5 data */
    unsigned char qat_seed[QAT_TLS1_PRF_SEED_MAXBUF];
    size_t qat_seedlen;
    unsigned char *qat_userLabel;
    size_t qat_userLabel_len;
    /* Digest to use for PRF */
    const EVP_MD *qat_md;
    /* Secret value to use for PRF */
    unsigned char *qat_sec;
    size_t qat_seclen;
    void *sw_prf_ctx_data;
    int qat_svm;
} QAT_TLS1_PRF_CTX;

/* Function Declarations */
int qat_tls1_prf_init(EVP_PKEY_CTX *ctx);
void qat_prf_cleanup(EVP_PKEY_CTX *ctx);
int qat_prf_tls_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
                                size_t *olen);
int qat_tls1_prf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
# endif /* ENABLE_QAT_HW_PRF */

#endif /* QAT_HW_PRF_H */
