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qat_hw_hkdf.c
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qat_hw_hkdf.c
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/* ====================================================================
*
*
* BSD LICENSE
*
* Copyright(c) 2019-2023 Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* ====================================================================
*/
/*****************************************************************************
* @file qat_hkdf.c
*
* This file provides an implementation of the HKDF operations for an
* OpenSSL engine
*
*****************************************************************************/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#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 "e_qat.h"
#include "qat_hw_callback.h"
#include "qat_hw_polling.h"
#include "qat_events.h"
#include "qat_hw_hkdf.h"
#ifdef USE_QAT_CONTIG_MEM
# include "qae_mem_utils.h"
#endif
#ifdef USE_USDM_MEM
# include "qat_hw_usdm_inf.h"
#endif
#ifdef ENABLE_QAT_FIPS
# include "qat_prov_cmvp.h"
#endif
#include "cpa.h"
#include "cpa_types.h"
#include "cpa_cy_key.h"
#ifdef ENABLE_QAT_FIPS
extern int qat_fips_key_zeroize;
#endif
/* 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.
*/
#define QAT_HKDF_INFO_MAXBUF 1024
/* Have a store of the s/w EVP_PKEY_METHOD for software fallback purposes. */
#ifndef QAT_OPENSSL_3
/* Only for OpenSSL 1.1.1. For OpenSSL 3, we use the default provider for SW fallback */
static const EVP_PKEY_METHOD *sw_hkdf_pmeth = NULL;
#endif
static EVP_PKEY_METHOD *_hidden_hkdf_pmeth = NULL;
#ifdef ENABLE_QAT_HW_HKDF
void qat_hkdf_pkey_methods(void)
{
EVP_PKEY_meth_set_init(_hidden_hkdf_pmeth, qat_hkdf_init);
EVP_PKEY_meth_set_cleanup(_hidden_hkdf_pmeth, qat_hkdf_cleanup);
EVP_PKEY_meth_set_derive(_hidden_hkdf_pmeth, NULL,
qat_hkdf_derive);
EVP_PKEY_meth_set_ctrl(_hidden_hkdf_pmeth, qat_hkdf_ctrl, NULL);
}
#endif
EVP_PKEY_METHOD *qat_hkdf_pmeth(void)
{
if (_hidden_hkdf_pmeth) {
if (!qat_reload_algo)
return _hidden_hkdf_pmeth;
EVP_PKEY_meth_free(_hidden_hkdf_pmeth);
}
if ((_hidden_hkdf_pmeth =
EVP_PKEY_meth_new(EVP_PKEY_HKDF, 0)) == NULL) {
QATerr(QAT_F_QAT_HKDF_PMETH, ERR_R_INTERNAL_ERROR);
return NULL;
}
#ifndef QAT_OPENSSL_3
/* Now save the current (non-offloaded) hkdf pmeth to sw_hkdf_pmeth */
/* for software fallback purposes */
if ((sw_hkdf_pmeth = EVP_PKEY_meth_find(EVP_PKEY_HKDF)) == NULL) {
QATerr(QAT_F_QAT_HKDF_PMETH, ERR_R_INTERNAL_ERROR);
return NULL;
}
#endif
#ifdef ENABLE_QAT_HW_HKDF
if (qat_hw_offload && (qat_hw_algo_enable_mask & ALGO_ENABLE_MASK_HKDF)) {
qat_hkdf_pkey_methods();
qat_hw_hkdf_offload = 1;
DEBUG("QAT HW HKDF Registration succeeded\n");
} else {
qat_hw_hkdf_offload = 0;
}
#endif
if (!qat_hw_hkdf_offload) {
#ifndef QAT_OPENSSL_PROVIDER
DEBUG("QAT HW HKDF is disabled, using OpenSSL SW\n");
#endif
#ifndef QAT_OPENSSL_3
EVP_PKEY_meth_copy(_hidden_hkdf_pmeth, sw_hkdf_pmeth);
#else
/* Although QATEngine supports software fallback to the default provider when
* using the OpenSSL 3 legacy engine API, if it fails during the registration
* phase, the pkey method cannot be set correctly because the OpenSSL3 legacy
* engine framework no longer provides a standard method for HKDF, PRF and SM2.
* https://github.com/openssl/openssl/issues/19047
*/
# if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
# ifdef ENABLE_QAT_HW_HKDF
qat_openssl3_hkdf_fallback = 1;
qat_hkdf_pkey_methods();
return _hidden_hkdf_pmeth;
# endif
# endif
EVP_PKEY_meth_free(_hidden_hkdf_pmeth);
return NULL;
#endif
}
return _hidden_hkdf_pmeth;
}
#ifdef ENABLE_QAT_HW_HKDF
/******************************************************************************
* function:
* qat_hkdf_init(EVP_PKEY_CTX *ctx)
*
* @param ctx [IN] - PKEY Context structure pointer
*
* @param [OUT] - Status
*
* description:
* Qat HKDF init function
******************************************************************************/
int qat_hkdf_init(EVP_PKEY_CTX *ctx)
{
QAT_HKDF_CTX *qat_hkdf_ctx = NULL;
int inst_num = QAT_INVALID_INSTANCE;
#ifndef QAT_OPENSSL_3
int (*sw_init_fn_ptr)(EVP_PKEY_CTX *) = NULL;
int ret = 0;
#endif
if (unlikely(ctx == NULL)) {
WARN("ctx (type EVP_PKEY_CTX) is NULL \n");
QATerr(QAT_F_QAT_HKDF_INIT, ERR_R_INTERNAL_ERROR);
return 0;
}
qat_hkdf_ctx = OPENSSL_zalloc(sizeof(*qat_hkdf_ctx));
if (qat_hkdf_ctx == NULL) {
WARN("Cannot allocate qat_hkdf_ctx\n");
QATerr(QAT_F_QAT_HKDF_INIT, ERR_R_MALLOC_FAILURE);
return 0;
}
if ((inst_num = get_instance(QAT_INSTANCE_SYM, QAT_INSTANCE_ANY))
== QAT_INVALID_INSTANCE) {
WARN("Failed to get an instance\n");
QATerr(QAT_F_QAT_HKDF_INIT, ERR_R_MALLOC_FAILURE);
return 0;
}
qat_hkdf_ctx->qat_svm = !qat_instance_details[inst_num].qat_instance_info.requiresPhysicallyContiguousMemory;
#ifndef QAT_OPENSSL_3
/* Software Ctrl functions are called here */
# ifdef QAT_KDF_SUPPORT
EVP_PKEY_meth_get_init((EVP_PKEY_METHOD *)sw_hkdf_pmeth, &sw_init_fn_ptr);
EVP_KDF_CTX *kctx = EVP_KDF_CTX_new_id(EVP_KDF_HKDF);
qat_hkdf_ctx->sw_hkdf_ctx_data = kctx;
# else
QAT_HKDF_PKEY_CTX *kctx;
EVP_PKEY_meth_get_init((EVP_PKEY_METHOD *)sw_hkdf_pmeth, &sw_init_fn_ptr);
kctx = OPENSSL_zalloc(sizeof(*kctx));
qat_hkdf_ctx->sw_hkdf_ctx_data = kctx;
# endif
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx->sw_hkdf_ctx_data);
ret = (*sw_init_fn_ptr)(ctx);
if (ret != 1) {
WARN("s/w hkdf_init fn failed.\n");
QATerr(QAT_F_QAT_HKDF_INIT, ERR_R_INTERNAL_ERROR);
return ret;
}
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx);
#endif
qat_hkdf_ctx->hkdf_op_data =
(CpaCyKeyGenHKDFOpData *) qat_mem_alloc(sizeof(CpaCyKeyGenHKDFOpData),
qat_hkdf_ctx->qat_svm, __FILE__, __LINE__);
if (NULL == qat_hkdf_ctx->hkdf_op_data) {
WARN("Failed to allocate memory for hkdf_op_data\n");
QATerr(QAT_F_QAT_HKDF_INIT, ERR_R_MALLOC_FAILURE);
return 0;
}
memset(qat_hkdf_ctx->hkdf_op_data, 0, sizeof(CpaCyKeyGenHKDFOpData));
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx);
return 1;
}
/******************************************************************************
* function:
* qat_hkdf_cleanup(EVP_PKEY_CTX *ctx)
*
* @param ctx [IN] - PKEY Context structure pointer
*
* description:
* Clear the QAT specific data stored in qat_hkdf_ctx
******************************************************************************/
void qat_hkdf_cleanup(EVP_PKEY_CTX *ctx)
{
#ifdef ENABLE_QAT_FIPS
qat_fips_key_zeroize = 0;
#endif
QAT_HKDF_CTX *qat_hkdf_ctx = NULL;
#ifndef QAT_OPENSSL_3
void (*sw_cleanup_fn_ptr)(EVP_PKEY_CTX *) = NULL;
#endif
if (unlikely(ctx == NULL)) {
WARN("ctx (type EVP_PKEY_CTX) is NULL \n");
return;
}
qat_hkdf_ctx = (QAT_HKDF_CTX *)EVP_PKEY_CTX_get_data(ctx);
if (qat_hkdf_ctx == NULL) {
WARN("qat_hkdf_ctx is NULL\n");
return;
}
#ifndef QAT_OPENSSL_3
if (qat_hkdf_ctx->fallback == 1 ||
qat_get_qat_offload_disabled() || qat_get_sw_fallback_enabled()) {
DEBUG("- Switched to software mode or fallback mode enabled.\n");
/* Clean up the sw_hkdf_ctx_data created by the init function */
EVP_PKEY_meth_get_cleanup((EVP_PKEY_METHOD *)sw_hkdf_pmeth, &sw_cleanup_fn_ptr);
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx->sw_hkdf_ctx_data);
(*sw_cleanup_fn_ptr)(ctx);
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx);
}
#else
/* Cleanup the memory used for sw fallback */
OPENSSL_cleanse(qat_hkdf_ctx->sw_ikm, qat_hkdf_ctx->sw_ikm_size);
OPENSSL_cleanse(qat_hkdf_ctx->sw_info, qat_hkdf_ctx->sw_info_size);
OPENSSL_cleanse(qat_hkdf_ctx->sw_salt, qat_hkdf_ctx->sw_salt_size);
#endif
if (qat_hkdf_ctx->hkdf_op_data) {
if (qat_hkdf_ctx->hkdf_op_data->seedLen)
OPENSSL_cleanse(qat_hkdf_ctx->hkdf_op_data->seed,
qat_hkdf_ctx->hkdf_op_data->seedLen);
if (qat_hkdf_ctx->hkdf_op_data->secretLen)
OPENSSL_cleanse(qat_hkdf_ctx->hkdf_op_data->secret,
qat_hkdf_ctx->hkdf_op_data->secretLen);
if (qat_hkdf_ctx->hkdf_op_data->infoLen)
OPENSSL_cleanse(qat_hkdf_ctx->hkdf_op_data->info,
qat_hkdf_ctx->hkdf_op_data->infoLen);
if (qat_hkdf_ctx->hkdf_op_data->label[0].labelLen) {
OPENSSL_cleanse(&qat_hkdf_ctx->hkdf_op_data->label[0],
qat_hkdf_ctx->hkdf_op_data->label[0].labelLen);
qat_hkdf_ctx->hkdf_op_data->numLabels = 0;
}
QAT_MEM_FREE_NONZERO_BUFF(qat_hkdf_ctx->hkdf_op_data, qat_hkdf_ctx->qat_svm);
}
qat_hkdf_ctx->fallback = 0;
OPENSSL_free(qat_hkdf_ctx);
EVP_PKEY_CTX_set_data(ctx, NULL);
#ifdef ENABLE_QAT_FIPS
qat_fips_key_zeroize = 1;
qat_fips_get_key_zeroize_status();
#endif
}
/******************************************************************************
* function:
* qat_hkdf_ctrl(EVP_PKEY_CTX *ctx,
* int type,
* int p1,
* void *p2)
*
* @param ctx [IN] - PKEY Context structure pointer
* @param type [IN] - Type
* @param p1 [IN] - Length/Size
* @param *p2 [IN] - Data
*
* @param [OUT] - Status
*
* description:
* Qat HKDF control function
******************************************************************************/
int qat_hkdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
if (unlikely(ctx == NULL)) {
WARN("Invalid input param.\n");
return 0;
}
QAT_HKDF_CTX *qat_hkdf_ctx = (QAT_HKDF_CTX *)EVP_PKEY_CTX_get_data(ctx);
#ifndef QAT_OPENSSL_3
int (*sw_ctrl_fn_ptr)(EVP_PKEY_CTX *, int, int, void *) = NULL;
int ret = 0;
#endif
if (unlikely(qat_hkdf_ctx == NULL)) {
WARN("qat_hkdf_ctx cannot be NULL\n");
return 0;
}
#ifndef QAT_OPENSSL_3
/* Software Ctrl functions are called here */
EVP_PKEY_meth_get_ctrl((EVP_PKEY_METHOD *)sw_hkdf_pmeth, &sw_ctrl_fn_ptr, NULL);
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx->sw_hkdf_ctx_data);
ret = (*sw_ctrl_fn_ptr)(ctx, type, p1, p2);
EVP_PKEY_CTX_set_data(ctx, qat_hkdf_ctx);
if (ret != 1) {
WARN("S/W hkdf_ctrl fn failed\n");
return ret;
}
#endif
switch (type) {
case EVP_PKEY_CTRL_HKDF_MD:
if (unlikely(p2 == NULL)) {
WARN("Invalid input param.\n");
return 0;
}
qat_hkdf_ctx->qat_md = p2;
return 1;
case EVP_PKEY_CTRL_HKDF_MODE:
qat_hkdf_ctx->mode = p1;
return 1;
case EVP_PKEY_CTRL_HKDF_SALT:
if (p1 == 0 || p2 == NULL)
return 1;
if (p1 < 0) {
WARN("Input param p1 length less than zero\n");
return 0;
}
if (qat_hkdf_ctx->hkdf_op_data == NULL) {
WARN("hkdf_op_data is NULL\n");
return 0;
}
#ifdef QAT_OPENSSL_3
/* Setup the sw fallback parameters */
OPENSSL_cleanse(qat_hkdf_ctx->sw_salt,
QAT_KDF_MAX_SEED_SZ);
memcpy(qat_hkdf_ctx->sw_salt, p2, p1);
qat_hkdf_ctx->sw_salt_size = p1;
#endif
OPENSSL_cleanse(qat_hkdf_ctx->hkdf_op_data->seed,
qat_hkdf_ctx->hkdf_op_data->seedLen);
qat_hkdf_ctx->hkdf_op_data->seedLen = 0;
memcpy(qat_hkdf_ctx->hkdf_op_data->seed, p2, p1);
qat_hkdf_ctx->hkdf_op_data->seedLen = p1;
return 1;
case EVP_PKEY_CTRL_HKDF_KEY:
if (p1 < 0) {
WARN("Input param p1 length less than zero\n");
return 0;
}
if (qat_hkdf_ctx->hkdf_op_data == NULL) {
WARN("hkdf_op_data is NULL\n");
return 0;
}
#ifdef QAT_OPENSSL_3
/* Setup the sw fallback parameters */
OPENSSL_cleanse(qat_hkdf_ctx->sw_ikm,
QAT_KDF_MAX_KEY_SZ);
memcpy(qat_hkdf_ctx->sw_ikm, p2, p1);
qat_hkdf_ctx->sw_ikm_size = p1;
#endif
OPENSSL_cleanse(qat_hkdf_ctx->hkdf_op_data->secret,
qat_hkdf_ctx->hkdf_op_data->secretLen);
qat_hkdf_ctx->hkdf_op_data->secretLen = 0;
memcpy(qat_hkdf_ctx->hkdf_op_data->secret, p2, p1);
qat_hkdf_ctx->hkdf_op_data->secretLen = p1;
return 1;
case EVP_PKEY_CTRL_HKDF_INFO:
if (p1 == 0 || p2 == NULL)
return 1;
if (qat_hkdf_ctx->hkdf_op_data == NULL) {
WARN("hkdf_op_data is NULL\n");
return 0;
}
if (p1 < 0 || p1 > (int) QAT_HKDF_INFO_MAXBUF - qat_hkdf_ctx->hkdf_op_data->infoLen) {
WARN("info p1 %d is out of range\n", p1);
return 0;
}
#ifdef QAT_OPENSSL_3
/* Setup the sw fallback parameters */
memcpy(qat_hkdf_ctx->sw_info + qat_hkdf_ctx->sw_info_size, p2, p1);
qat_hkdf_ctx->sw_info_size += p1;
#endif
memcpy(qat_hkdf_ctx->hkdf_op_data->info
+ qat_hkdf_ctx->hkdf_op_data->infoLen, p2, p1);
qat_hkdf_ctx->hkdf_op_data->infoLen += p1;
return 1;
#ifdef QAT_OPENSSL_PROVIDER
case EVP_PKEY_CTRL_HKDF_PREFIX:
if (p1 == 0 || p2 == NULL)
return 1;
if (qat_hkdf_ctx->hkdf_op_data == NULL) {
WARN("hkdf_op_data is NULL\n");
return 0;
}
qat_hkdf_ctx->prefix = OPENSSL_zalloc(p1);
if (qat_hkdf_ctx->prefix == NULL) {
WARN("Cannot allocate qat_hkdf_ctx\n");
QATerr(QAT_F_QAT_HKDF_CTRL, ERR_R_MALLOC_FAILURE);
return 0;
}
memcpy(qat_hkdf_ctx->prefix, p2, p1);
qat_hkdf_ctx->prefix_len = p1;
return 1;
case EVP_PKEY_CTRL_HKDF_DATA:
if (p1 == 0 || p2 == NULL)
return 1;
if (qat_hkdf_ctx->hkdf_op_data == NULL) {
WARN("hkdf_op_data is NULL\n");
return 0;
}
qat_hkdf_ctx->data = OPENSSL_zalloc(p1);
if (qat_hkdf_ctx->data == NULL) {
WARN("Cannot allocate qat_hkdf_ctx\n");
QATerr(QAT_F_QAT_HKDF_CTRL, ERR_R_MALLOC_FAILURE);
return 0;
}
memcpy(qat_hkdf_ctx->data, p2, p1);
qat_hkdf_ctx->data_len = p1;
return 1;
case EVP_PKEY_CTRL_HKDF_LABEL:
if (p1 == 0 || p2 == NULL)
return 1;
if (qat_hkdf_ctx->hkdf_op_data == NULL) {
WARN("hkdf_op_data is NULL\n");
return 0;
}
qat_hkdf_ctx->hkdf_op_data->numLabels = 1;
qat_hkdf_ctx->label = OPENSSL_zalloc(p1);
qat_hkdf_ctx->label_len = p1;
if (qat_hkdf_ctx->label == NULL) {
WARN("Cannot allocate qat_hkdf_ctx\n");
QATerr(QAT_F_QAT_HKDF_CTRL, ERR_R_MALLOC_FAILURE);
return 0;
}
memcpy(qat_hkdf_ctx->label, p2, p1);
return 1;
#endif
default:
WARN("Invalid type %d\n", type);
return -2;
} /* switch */
}
/******************************************************************************
* function:
* void qat_hkdf_cb(void *pCallbackTag,
* CpaStatus status,
* void *pOpdata,
* CpaFlatBuffer *pOut)
*
* @param pCallbackTag [IN] - Pointer to user data
* @param status [IN] - Status of the operation
* @param pOpData [IN] - Pointer to operation data of the request
* @param out [IN] - Pointer to the output buffer
*
* description:
* Callback to indicate the completion of HKDF
******************************************************************************/
static void qat_hkdf_cb(void *pCallbackTag, CpaStatus status,
void *pOpData, CpaFlatBuffer * pOut)
{
if (enable_heuristic_polling) {
QAT_ATOMIC_DEC(num_kdf_requests_in_flight);
}
qat_crypto_callbackFn(pCallbackTag, status, CPA_CY_SYM_OP_CIPHER, pOpData,
NULL, CPA_TRUE);
}
/******************************************************************************
* function:
* qat_get_cipher_suite(QAT_HKDF_CTX *qat_hkdf_ctx)
*
* @param qat_hkdf_ctx [IN] - HKDF context
* @param cipher_suite [OUT] - Ptr to cipher suite in CPA format
*
* description:
* Retrieve the cipher suite from the hkdf context and convert it to
* the CPA format
******************************************************************************/
int qat_get_cipher_suite(QAT_HKDF_CTX * qat_hkdf_ctx)
{
const EVP_MD *md = NULL;
if (qat_hkdf_ctx == NULL) {
WARN("qat_hkdf_ctx %p is NULL.\n", qat_hkdf_ctx);
return 0;
}
md = qat_hkdf_ctx->qat_md;
if (md == NULL) {
WARN("md is NULL.\n");
return 0;
}
switch (EVP_MD_type(md)) {
case NID_sha256:
qat_hkdf_ctx->cipher_suite = CPA_CY_HKDF_TLS_AES_128_GCM_SHA256;
break;
case NID_sha384:
qat_hkdf_ctx->cipher_suite = CPA_CY_HKDF_TLS_AES_256_GCM_SHA384;
break;
#if defined(QAT20_OOT)
case NID_sm3:
WARN("HKDF based on SM3 not supported\n");
return 0;
#endif
default:
WARN("Unsupported HKDF hash type\n");
return 0;
}
return 1;
}
/******************************************************************************
* function:
* qat_set_hkdf_mode(HKDF *qat_hkdf_ctx)
*
* @param qat_hkdf_ctx [IN] - HKDF context
*
* description:
* Set the mode into hkdf_op_data from the hkdf context
******************************************************************************/
static int qat_set_hkdf_mode(QAT_HKDF_CTX * qat_hkdf_ctx)
{
if (qat_hkdf_ctx == NULL) {
WARN("Either qat_hkdf_ctx %p is NULL\n", qat_hkdf_ctx);
return 0;
}
switch (qat_hkdf_ctx->mode) {
case EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY:
qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp = CPA_CY_HKDF_KEY_EXTRACT;
break;
case EVP_PKEY_HKDEF_MODE_EXPAND_ONLY:
#ifdef QAT_OPENSSL_PROVIDER
if (!strcmp((const char*)kdf_name, "HKDF"))
qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp = CPA_CY_HKDF_KEY_EXPAND;
if(!strcmp((const char*)kdf_name, "TLS13-KDF"))
qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp = CPA_CY_HKDF_KEY_EXPAND_LABEL;
#else
qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp = CPA_CY_HKDF_KEY_EXPAND;
#endif
break;
case EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND:
qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp = CPA_CY_HKDF_KEY_EXTRACT_EXPAND;
break;
default:
WARN("Unknown HKDF mode \n");
return 0;
}
return 1;
}
#ifdef QAT_OPENSSL_3
/******************************************************************************
* function:
* default_provider_HKDF_derive(QAT_HKDF_CTX *qat_hkdf_ctx,
* unsigned char *out,
* size_t olen)
*
* @param qat_hkdf_ctx [IN] - HKDF context
* @param out [OUT] - Ptr to the key that will be generated
* @param olen [IN] - Length of the key
*
* description:
* HKDF SW fallback function. Using default provider of OpenSSL 3
******************************************************************************/
int default_provider_HKDF_derive(QAT_HKDF_CTX *qat_hkdf_ctx, unsigned char *out, size_t olen) {
int rv = 0;
EVP_KDF *kdf = NULL;
EVP_KDF_CTX *kctx = NULL;
OSSL_PARAM params[6], *p = params;
OSSL_LIB_CTX *library_context = NULL;
char *mode = NULL;
const char *mdname;
library_context = OSSL_LIB_CTX_new();
if (library_context == NULL) {
fprintf(stderr, "OSSL_LIB_CTX_new() returned NULL\n");
goto end;
}
/* Fetch the key derivation function implementation */
kdf = EVP_KDF_fetch(library_context, "HKDF", "provider=default");
if (kdf == NULL) {
fprintf(stderr, "EVP_KDF_fetch() returned NULL\n");
goto end;
}
/* Create a context for the key derivation operation */
kctx = EVP_KDF_CTX_new(kdf);
if (kctx == NULL) {
fprintf(stderr, "EVP_KDF_CTX_new() returned NULL\n");
goto end;
}
switch (qat_hkdf_ctx->mode) {
case EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY:
mode = "EXTRACT_ONLY";
break;
case EVP_PKEY_HKDEF_MODE_EXPAND_ONLY:
mode = "EXPAND_ONLY";
break;
case EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND:
mode = "EXTRACT_AND_EXPAND";
break;
default:
WARN("Unknown HKDF mode \n");
return 0;
}
mdname = EVP_MD_get0_name(qat_hkdf_ctx->qat_md);
/* Set the underlying hash function used to derive the key */
*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, (char *)mdname, 0);
/* Set input keying material */
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, qat_hkdf_ctx->sw_ikm,
qat_hkdf_ctx->sw_ikm_size);
/* Set application specific information */
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, qat_hkdf_ctx->sw_info,
qat_hkdf_ctx->sw_info_size);
/* Set mode */
*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_MODE, mode, 0);
/* Set salt */
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, qat_hkdf_ctx->sw_salt,
qat_hkdf_ctx->sw_salt_size);
*p = OSSL_PARAM_construct_end();
/* Derive the key */
if (EVP_KDF_derive(kctx, out, olen, params) != 1) {
fprintf(stderr, "EVP_KDF_derive() failed\n");
goto end;
}
rv = 1;
end:
EVP_KDF_CTX_free(kctx);
EVP_KDF_free(kdf);
OSSL_LIB_CTX_free(library_context);
return rv;
}
#endif
/******************************************************************************
* function:
* qat_hkdf_derive(QAT_HKDF_CTX *qat_hkdf_ctx,
* unsigned char *key,
* size_t *olen)
*
* @param qat_hkdf_ctx [IN] - HKDF context
* @param key [OUT] - Ptr to the key that will be generated
* @param olen [IN] - Length of the key
*
* description:
* HKDF derive function for TLS case
******************************************************************************/
int qat_hkdf_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *olen)
{
int ret = 0, job_ret = 0;
CpaFlatBuffer *generated_key = NULL;
CpaStatus status = CPA_STATUS_FAIL;
QAT_HKDF_CTX *qat_hkdf_ctx = NULL;
int key_length = 0;
int offset = 0;
int md_size = 0;
op_done_t op_done;
int qatPerformOpRetries = 0;
int iMsgRetry = getQatMsgRetryCount();
unsigned long int ulPollInterval = getQatPollInterval();
int inst_num = QAT_INVALID_INSTANCE;
thread_local_variables_t *tlv = NULL;
#ifdef QAT_OPENSSL_PROVIDER
size_t hkdflabellen;
unsigned char hkdflabel[2048];
qat_WPACKET pkt;
const unsigned char *tls13_data;
size_t tls13_datalen;
unsigned char tls13_kdf_hash[EVP_MAX_MD_SIZE];
#endif
#ifndef QAT_OPENSSL_3
int (*sw_derive_fn_ptr)(EVP_PKEY_CTX *, unsigned char *, size_t *) = NULL;
#endif
if (unlikely(NULL == ctx || NULL == key || NULL == olen)) {
WARN("Either ctx %p, key %p or olen %p is NULL\n", ctx, key, olen);
QATerr(QAT_F_QAT_HKDF_DERIVE, ERR_R_PASSED_NULL_PARAMETER);
return ret;
}
#ifdef ENABLE_QAT_FIPS
qat_fips_get_approved_status();
#endif
qat_hkdf_ctx = (QAT_HKDF_CTX *)EVP_PKEY_CTX_get_data(ctx);
if (qat_hkdf_ctx == NULL) {
WARN("qat_hkdf_ctx is NULL\n");
QATerr(QAT_F_QAT_HKDF_DERIVE, ERR_R_INTERNAL_ERROR);
return ret;
}
#if defined(QAT_OPENSSL_3) && !defined(QAT_OPENSSL_PROVIDER)
if (qat_openssl3_hkdf_fallback == 1) {
DEBUG("- Switched to software mode\n");
qat_hkdf_ctx->fallback = 1;
goto err;
}
#endif
DEBUG("QAT HW HKDF Started\n");
if (qat_get_qat_offload_disabled()) {
DEBUG("- Switched to software mode\n");
qat_hkdf_ctx->fallback = 1;
goto err;
}
if (!qat_get_cipher_suite(qat_hkdf_ctx)) {
DEBUG("Failed to get cipher suite, fallback to SW\n");
qat_hkdf_ctx->fallback = 1;
goto err;
}
if ((inst_num = get_instance(QAT_INSTANCE_SYM, QAT_INSTANCE_ANY))
== QAT_INVALID_INSTANCE) {
WARN("Failed to get an instance\n");
if (qat_get_sw_fallback_enabled()) {
CRYPTO_QAT_LOG("Failed to get an instance - fallback to SW - %s\n", __func__);
qat_hkdf_ctx->fallback = 1;
goto err;
} else {
QATerr(QAT_F_QAT_HKDF_DERIVE, ERR_R_INTERNAL_ERROR);
return 0;
}
}
qat_hkdf_ctx->qat_svm = !qat_instance_details[inst_num].qat_instance_info.requiresPhysicallyContiguousMemory;
if (!qat_set_hkdf_mode(qat_hkdf_ctx)) {
WARN("Error setting mode into HKDFOpdata\n");
QATerr(QAT_F_QAT_HKDF_DERIVE, ERR_R_INTERNAL_ERROR);
goto err;
}
generated_key = (CpaFlatBuffer *) OPENSSL_zalloc(sizeof(CpaFlatBuffer));
if (NULL == generated_key) {
WARN("Failed to allocate memory for generated_key\n");
QATerr(QAT_F_QAT_HKDF_DERIVE, ERR_R_MALLOC_FAILURE);
goto err;
}
key_length = *olen;
md_size = EVP_MD_size(qat_hkdf_ctx->qat_md);
#ifdef QAT_OPENSSL_PROVIDER
/*hkdf label creation and intialization for TLS13-KDF*/
if((qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp == CPA_CY_HKDF_KEY_EXPAND_LABEL)) {
if (qat_hkdf_ctx->hkdf_op_data->seedLen != 0) {
EVP_MD_CTX *mctx = EVP_MD_CTX_new();
/* The pre-extract derive step uses a hash of no messages */
if (mctx == NULL
|| EVP_DigestInit_ex(mctx, qat_hkdf_ctx->qat_md, NULL) <= 0
|| EVP_DigestFinal_ex(mctx, tls13_kdf_hash, NULL) <= 0) {
EVP_MD_CTX_free(mctx);
return 0;
}
EVP_MD_CTX_free(mctx);
memcpy(qat_hkdf_ctx->hkdf_op_data->secret, qat_hkdf_ctx->hkdf_op_data->seed,
qat_hkdf_ctx->hkdf_op_data->seedLen);
qat_hkdf_ctx->hkdf_op_data->secretLen = qat_hkdf_ctx->hkdf_op_data->seedLen;
OPENSSL_cleanse(qat_hkdf_ctx->hkdf_op_data->seed,
qat_hkdf_ctx->hkdf_op_data->seedLen);
qat_hkdf_ctx->hkdf_op_data->seedLen = 0;
tls13_data = tls13_kdf_hash;
tls13_datalen = md_size;
} else {
tls13_data = qat_hkdf_ctx->data;
tls13_datalen = qat_hkdf_ctx->data_len;
}
if (!QAT_WPACKET_init_static_len(&pkt, hkdflabel, sizeof(hkdflabel), 0)
|| !QAT_WPACKET_put_bytes_u16(&pkt, key_length)
|| !QAT_WPACKET_start_sub_packet_u8(&pkt)
|| !QAT_WPACKET_memcpy(&pkt, qat_hkdf_ctx->prefix, qat_hkdf_ctx->prefix_len)
|| !QAT_WPACKET_memcpy(&pkt, qat_hkdf_ctx->label, qat_hkdf_ctx->label_len)
|| !QAT_WPACKET_close(&pkt)
|| !QAT_WPACKET_sub_memcpy_u8(&pkt, tls13_data, (tls13_data == NULL) ? 0 : tls13_datalen)
|| !QAT_WPACKET_get_total_written(&pkt, &hkdflabellen)
|| !QAT_WPACKET_finish(&pkt)) {
QAT_WPACKET_cleanup(&pkt);}
memcpy(qat_hkdf_ctx->hkdf_op_data->label[0].label, hkdflabel, hkdflabellen);
qat_hkdf_ctx->hkdf_op_data->label[0].labelLen = hkdflabellen;
qat_hkdf_ctx->hkdf_op_data->label[0].sublabelFlag = 0x00;
}
#endif
/* For Extract and Expand, PRK and OKM is sent back so datalen is
modified here to accommodate it */
if (qat_hkdf_ctx->hkdf_op_data->hkdfKeyOp == CPA_CY_HKDF_KEY_EXTRACT_EXPAND) {
offset = md_size;
key_length = 2 * offset;
}
/* API Expects Key Length equal to md_size */
if (key_length < md_size)
key_length = md_size;
generated_key->pData = (Cpa8U *) qat_mem_alloc(key_length, qat_hkdf_ctx->qat_svm,
__FILE__, __LINE__);
if (NULL == generated_key->pData) {
WARN("Failed to allocate memory for generated_key data\n");
QATerr(QAT_F_QAT_HKDF_DERIVE, ERR_R_MALLOC_FAILURE);
goto err;
}
generated_key->dataLenInBytes = key_length;
/* ---- Perform the operation ---- */
DUMP_HKDF_OP_DATA(qat_hkdf_ctx->hkdf_op_data);
tlv = qat_check_create_local_variables();
if (NULL == tlv) {
WARN("could not create local variables\n");
QATerr(QAT_F_QAT_HKDF_DERIVE, 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_HKDF_DERIVE, ERR_R_INTERNAL_ERROR);
qat_cleanup_op_done(&op_done);
goto err;
}
}
do {
if (status == CPA_STATUS_RETRY &&
(inst_num = get_instance(QAT_INSTANCE_SYM, qat_hkdf_ctx->qat_svm))
== QAT_INVALID_INSTANCE) {
WARN("Failed to get an instance\n");
if (qat_get_sw_fallback_enabled()) {
CRYPTO_QAT_LOG("Failed to get an instance - fallback to SW - %s\n", __func__);
qat_hkdf_ctx->fallback = 1;
} else {
QATerr(QAT_F_QAT_HKDF_DERIVE, 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;
}
DUMP_KEYGEN_TLS(qat_instance_handles[inst_num], generated_key);
DEBUG("Calling cpaCyKeyGenTls3 \n");
status = cpaCyKeyGenTls3(qat_instance_handles[inst_num],
qat_hkdf_cb, &op_done,
qat_hkdf_ctx->hkdf_op_data,
qat_hkdf_ctx->cipher_suite,
generated_key);
if (status == CPA_STATUS_RETRY) {
if (op_done.job == NULL) {
usleep(ulPollInterval +
(qatPerformOpRetries %
QAT_RETRY_BACKOFF_MODULO_DIVISOR));
qatPerformOpRetries++;
if (iMsgRetry != QAT_INFINITE_MAX_NUM_RETRIES) {
if (qatPerformOpRetries >= iMsgRetry) {
WARN("No. of retries exceeded max retry : %d\n", iMsgRetry);
break;
}
}
} else {
if ((qat_wake_job(op_done.job, ASYNC_STATUS_EAGAIN) == 0) ||
(qat_pause_job(op_done.job, ASYNC_STATUS_EAGAIN) == 0)) {
WARN("qat_wake_job or qat_pause_job failed\n");
break;
}
}
}
} while (status == CPA_STATUS_RETRY);
if (CPA_STATUS_SUCCESS != status) {
WARN("Failed to submit request to qat - status = %d\n", status);
if (qat_get_sw_fallback_enabled() &&
(status == CPA_STATUS_RESTARTING || status == CPA_STATUS_FAIL)) {
CRYPTO_QAT_LOG("Failed to submit request to qat inst_num %d device_id %d - fallback to SW - %s\n",
inst_num,
qat_instance_details[inst_num].qat_instance_info.physInstId.packageId,
__func__);
qat_hkdf_ctx->fallback = 1;
} else if (status == CPA_STATUS_UNSUPPORTED) {
WARN("Algorithm Unsupported in QAT_HW! Using OpenSSL SW\n");
qat_hkdf_ctx->fallback = 1;
} else {
QATerr(QAT_F_QAT_HKDF_DERIVE, 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) {