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qat_hw_chachapoly.c
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qat_hw_chachapoly.c
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/* ====================================================================
*
*
* BSD LICENSE
*
* Copyright(c) 2021-2024 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_hw_chachapoly.c
*
* This file provides an implementation of CHACHAPOLY operations for 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/evp.h>
#include "e_qat.h"
#include "qat_hw_callback.h"
#include "qat_hw_polling.h"
#include "qat_events.h"
#include "qat_utils.h"
#include "qat_hw_ciphers.h"
#include "qat_evp.h"
#include "qat_hw_chachapoly.h"
#ifdef QAT_HW_INTREE
# ifndef ENABLE_QAT_HW_CHACHAPOLY
# define ENABLE_QAT_HW_CHACHAPOLY
# endif
#endif
#ifdef QAT_OPENSSL_PROVIDER
#include "qat_prov_chachapoly.h"
#endif
# define GET_SW_CHACHA_CTX EVP_chacha20_poly1305()
#ifdef ENABLE_QAT_HW_CHACHAPOLY
# ifdef QAT_OPENSSL_PROVIDER
static int qat_chacha20_poly1305_init_key_iv(QAT_PROV_CIPHER_CTX *cp_ctx,
const unsigned char *key,
const unsigned char *iv);
static int qat_chacha20_poly1305_mac_keygen(QAT_PROV_CIPHER_CTX *cp_ctx);
static void qat_chacha20_core(chacha_buf *output,
const unsigned int input[16]);
static void qat_chacha20_ctr32(unsigned char *out, const unsigned char *inp,
size_t len, const unsigned int key[8],
const unsigned int counter[4]);
# else
static int qat_chacha20_poly1305_init(EVP_CIPHER_CTX *ctx,
const unsigned char *user_key,
const unsigned char *iv, int enc);
static int qat_chacha20_poly1305_do_cipher(EVP_CIPHER_CTX * ctx,
unsigned char *out,
const unsigned char *in,
size_t len);
static int qat_chacha20_poly1305_cleanup(EVP_CIPHER_CTX *ctx);
static int qat_chacha20_poly1305_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
void *ptr);
static int qat_chacha20_poly1305_init_key_iv(qat_chachapoly_ctx *cp_ctx,
const unsigned char *key,
const unsigned char *iv);
static int qat_chacha20_poly1305_mac_keygen(qat_chachapoly_ctx *cp_ctx);
static void qat_chacha20_core(chacha_buf *output,
const unsigned int input[16]);
static void qat_chacha20_ctr32(unsigned char *out, const unsigned char *inp,
size_t len, const unsigned int key[8],
const unsigned int counter[4]);
# endif
/******************************************************************************
* function:
* chachapoly_cipher_meth(int nid, int keylen)
*
* @param nid [IN] - Cipher NID to be created
* @param keylen [IN] - Key length of cipher
* @retval - EVP_CIPHER * to created cipher
* @retval - NULL if failure
*
* description:
* create a new EVP_CIPHER based on requested nid
******************************************************************************/
const EVP_CIPHER *chachapoly_cipher_meth(int nid, int keylen)
{
EVP_CIPHER *c = NULL;
# ifndef QAT_OPENSSL_PROVIDER
int res = 1;
if (qat_hw_offload &&
(qat_hw_algo_enable_mask & ALGO_ENABLE_MASK_CHACHA_POLY)) {
/* block size is 1 and key size is 32 bytes. */
if ((c = EVP_CIPHER_meth_new(nid, 1, keylen)) == NULL) {
WARN("Failed to allocate cipher methods for nid %d\n", nid);
return NULL;
}
/* IV size is 12 bytes for TLS protocol */
res &= EVP_CIPHER_meth_set_iv_length(c, QAT_CHACHA20_POLY1305_MAX_IVLEN);
res &= EVP_CIPHER_meth_set_flags(c, EVP_CIPH_FLAG_AEAD_CIPHER |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_ALWAYS_CALL_INIT |
EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY |
EVP_CIPH_FLAG_CUSTOM_CIPHER |
EVP_CIPH_CUSTOM_IV_LENGTH);
res &= EVP_CIPHER_meth_set_init(c, qat_chacha20_poly1305_init);
res &= EVP_CIPHER_meth_set_do_cipher(c, qat_chacha20_poly1305_do_cipher);
res &= EVP_CIPHER_meth_set_cleanup(c, qat_chacha20_poly1305_cleanup);
res &= EVP_CIPHER_meth_set_impl_ctx_size(c, 0);
res &= EVP_CIPHER_meth_set_set_asn1_params(c, NULL);
res &= EVP_CIPHER_meth_set_get_asn1_params(c, NULL);
res &= EVP_CIPHER_meth_set_ctrl(c, qat_chacha20_poly1305_ctrl);
if (res == 0) {
WARN("Failed to set cipher methods for nid %d\n", nid);
EVP_CIPHER_meth_free(c);
c = NULL;
}
qat_hw_chacha_poly_offload = 1;
DEBUG("QAT HW CHACHA POLY registration succeeded\n");
return c;
} else {
qat_hw_chacha_poly_offload = 0;
DEBUG("QAT HW CHACHA POLY is disabled, using OpenSSL SW\n");
EVP_CIPHER_meth_free(c);
return EVP_chacha20_poly1305();
}
# else
return c;
# endif
}
/******************************************************************************
* function:
* qat_chachapoly_cb(void *callbackTag, CpaStatus status,
* const CpaCySymOp operationType, void *pOpData,
* CpaBufferList * pDstBuffer, CpaBoolean verifyResult)
*
* @param pCallbackTag [IN] - Opaque value provided by user while making
* individual function call.
* @param status [IN] - Status of the operation.
* @param operationType [IN] - Identifies the operation type requested.
* @param pOpData [IN] - Pointer to structure with input parameters.
* @param pDstBuffer [IN] - Destination buffer to hold the data output.
* @param verifyResult [IN] - Used to verify digest result.
*
* description:
* Callback function used by chachapoly.
******************************************************************************/
static void qat_chachapoly_cb(void *callbackTag, CpaStatus status,
const CpaCySymOp operationType,
void *pOpData, CpaBufferList *pDstBuffer,
CpaBoolean verifyResult)
{
if (enable_heuristic_polling) {
QAT_ATOMIC_DEC(num_cipher_pipeline_requests_in_flight);
}
qat_crypto_callbackFn(callbackTag, status, CPA_CY_SYM_OP_CIPHER, pOpData,
NULL, CPA_TRUE);
}
static const CpaCySymOpData template_opData = {
.sessionCtx = NULL,
.packetType = CPA_CY_SYM_PACKET_TYPE_FULL,
.pIv = NULL,
.ivLenInBytes = 0,
.cryptoStartSrcOffsetInBytes = 0,
.messageLenToCipherInBytes = 0,
.hashStartSrcOffsetInBytes = 0,
.messageLenToHashInBytes = 0,
.pDigestResult = NULL,
.pAdditionalAuthData = NULL
};
/******************************************************************************
* function:
* qat_chacha20_core(chacha_buf *output, const unsigned int input[16])
*
* @param output [OUT] - output buffer to hold key bytes
* @param input [IN] - input keystream
*
* description:
* chacha_core performs 20 rounds of ChaCha on the input words in
* "input" and writes the 64 output bytes to "output".
******************************************************************************/
static void qat_chacha20_core(chacha_buf *output, const unsigned int input[16])
{
unsigned x[16];
int i;
memcpy(x, input, sizeof(x));
for (i = 20; i > 0; i -= 2) {
QUARTERROUND(0, 4, 8, 12);
QUARTERROUND(1, 5, 9, 13);
QUARTERROUND(2, 6, 10, 14);
QUARTERROUND(3, 7, 11, 15);
QUARTERROUND(0, 5, 10, 15);
QUARTERROUND(1, 6, 11, 12);
QUARTERROUND(2, 7, 8, 13);
QUARTERROUND(3, 4, 9, 14);
}
for (i = 0; i < 16; ++i)
output->u[i] = x[i] + input[i];
}
/******************************************************************************
* function:
* qat_chacha20_ctr32(unsigned char *out, const unsigned char *inp,
* size_t len, const unsigned int key[8],
* const unsigned int counter[4])
*
* @param out [OUT] - output buffer to hold key bytes
* @param inp [IN] - input keystream
* @param len [IN] - length of input key buffer
* @param key [IN] - chacha key collected into 8 64-bit elements
* @param counter [IN] - nonce and counter values concatenated into 4 32-bit elements
*
* description:
* ChaCha20_ctr32 encrypts "len" bytes from "inp" with the given key and
* nonce and writes the result to "out", which may be equal to "inp".
******************************************************************************/
static void qat_chacha20_ctr32(unsigned char *out, const unsigned char *inp,
size_t len, const unsigned int key[8],
const unsigned int counter[4])
{
static const char sigma[16] = "expand 32-byte k";
const char *constants;
unsigned int input[16];
chacha_buf buf;
size_t todo, i;
constants = sigma;
input[0] = U8TO32_LITTLE(constants + 0);
input[1] = U8TO32_LITTLE(constants + 4);
input[2] = U8TO32_LITTLE(constants + 8);
input[3] = U8TO32_LITTLE(constants + 12);
input[4] = key[0];
input[5] = key[1];
input[6] = key[2];
input[7] = key[3];
input[8] = key[4];
input[9] = key[5];
input[10] = key[6];
input[11] = key[7];
input[12] = counter[0];
input[13] = counter[1];
input[14] = counter[2];
input[15] = counter[3];
while (len > 0) {
todo = sizeof(buf);
if (len < todo)
todo = len;
qat_chacha20_core(&buf, input);
for (i = 0; i < todo; i++)
out[i] = inp[i] ^ buf.c[i];
out += todo;
inp += todo;
len -= todo;
input[12]++;
}
}
/******************************************************************************
* function:
* qat_chacha20_poly1305_init_key_iv(qat_chachapoly_ctx *ctx,
* const unsigned char *key,
* const unsigned char *iv)
*
* @param ctx [IN] - pointer to existing cipher ctx
* @param key [IN] - 256 bit cipher key
* @param iv [IN] - 96 bit IV
*
* @retval 1 function succeeded
* @retval 0 function failed
*
* description:
* Initialise cipher key and IV in order to generate Poly1305(mac) key.
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
static int qat_chacha20_poly1305_init_key_iv(QAT_PROV_CIPHER_CTX *cp_ctx,
const unsigned char *key,
const unsigned char *iv)
#else
static int qat_chacha20_poly1305_init_key_iv(qat_chachapoly_ctx *cp_ctx,
const unsigned char *key,
const unsigned char *iv)
#endif
{
int i;
if (cp_ctx == NULL) {
WARN("chachapoly cipher data is NULL.\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_INIT_KEY_IV,
QAT_R_CHACHAPOLY_CTX_NULL);
return 0;
}
if (iv != NULL) {
unsigned char temp[QAT_CHACHA_CTR_SIZE] = { 0 };
if (cp_ctx->nonce_len <= QAT_CHACHA_CTR_SIZE)
memcpy(temp + QAT_CHACHA_CTR_SIZE - cp_ctx->nonce_len, iv,
cp_ctx->nonce_len);
for (i = 0; i < QAT_CHACHA_CTR_SIZE; i+=4)
cp_ctx->counter[i/4] = CHACHA_U8TOU32(temp+i);
cp_ctx->iv[0] = cp_ctx->counter[1];
cp_ctx->iv[1] = cp_ctx->counter[2];
cp_ctx->iv[2] = cp_ctx->counter[3];
}
if (key != NULL) {
for (i = 0; i < QAT_CHACHA_KEY_SIZE; i+=4)
cp_ctx->chacha_key[i/4] = CHACHA_U8TOU32(key+i);
}
return 1;
}
/******************************************************************************
* function:
* qat_chacha20_poly1305_mac_keygen(qat_chachapoly_ctx *cp_ctx)
*
* @param ctx [IN] - pointer to existing cipher ctx
*
* @retval 1 function succeeded
* @retval 0 function failed
*
* description:
* Generate One-Time Poly1305 key for the hash operation
* using cipher key and IV.
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
static int qat_chacha20_poly1305_mac_keygen(QAT_PROV_CIPHER_CTX *cp_ctx)
#else
static int qat_chacha20_poly1305_mac_keygen(qat_chachapoly_ctx *cp_ctx)
#endif
{
const unsigned char in_buf[2 * QAT_CHACHA_BLK_SIZE] = { 0 };
if (cp_ctx == NULL) {
WARN("chachapoly cipher data is NULL.\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_MAC_KEYGEN,
QAT_R_CHACHAPOLY_CTX_NULL);
return 0;
}
/* Initialise counter as 0. */
cp_ctx->counter[0] = 0;
/* qat_chacha20_ctr32 encrypts QAT_CHACHA_BLK_SIZE bytes from in_buf
* with the given key and nonce and writes the result
* to cp_ctx->mac_key */
qat_chacha20_ctr32(cp_ctx->mac_key, in_buf, QAT_CHACHA_BLK_SIZE,
cp_ctx->chacha_key, cp_ctx->counter);
cp_ctx->mac_key_set = 1;
return 1;
}
/******************************************************************************
* function:
* qat_chachapoly_session_data_init(qat_chachapoly_ctx *cp_ctx,
* const unsigned char *inkey,
* const unsigned char *iv,
* int enc)
*
* @param ctx [IN] - pointer to existing cipher ctx
* @param inKey [IN] - cipher key
* @param iv [IN] - initialisation vector
* @param enc [IN] - 1 = encrypt, 0 = decrypt
*
* @retval 1 function succeeded
* @retval 0 function failed
*
* description:
* This function is to create QAT specific session data.
* It is called from the function qat_chacha20_poly1305_init().
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
static int qat_chachapoly_session_data_init(QAT_PROV_CIPHER_CTX *cp_ctx,
const unsigned char* key,
const unsigned char* iv,
int enc)
#else
static int qat_chachapoly_session_data_init(qat_chachapoly_ctx *cp_ctx,
const unsigned char* key,
const unsigned char* iv,
int enc)
#endif
{
if (cp_ctx == NULL) {
WARN("chachapoly cipher data is NULL.\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT,
QAT_R_CHACHAPOLY_CTX_NULL);
return 0;
}
if (cp_ctx->session_data == NULL) {
cp_ctx->session_data = OPENSSL_zalloc(sizeof(CpaCySymSessionSetupData));
if (cp_ctx->session_data == NULL) {
WARN("Failed to allocate session setup data\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT,
ERR_R_MALLOC_FAILURE);
return 0;
}
}
cp_ctx->inst_num = get_instance(QAT_INSTANCE_SYM, QAT_INSTANCE_ANY);
if (cp_ctx->inst_num == QAT_INVALID_INSTANCE) {
WARN("Failed to get a QAT instance.\n");
if (!qat_get_sw_fallback_enabled())
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT, ERR_R_INTERNAL_ERROR);
return 0;
}
cp_ctx->qat_svm = !qat_instance_details[cp_ctx->inst_num].qat_instance_info.requiresPhysicallyContiguousMemory;
DEBUG("inst_num = %d inst mem type %d \n", cp_ctx->inst_num, cp_ctx->qat_svm);
if (cp_ctx->mac_key == NULL) {
cp_ctx->mac_key = qat_mem_alloc(QAT_CHACHA_BLK_SIZE, cp_ctx->qat_svm, __FILE__, __LINE__);
if (cp_ctx->mac_key == NULL) {
WARN("Failure in mac_key buffer allocation.\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT,
ERR_R_MALLOC_FAILURE);
return -1;
}
}
if (key != NULL) {
memcpy(cp_ctx->cipher_key, key, QAT_CHACHA_KEY_SIZE);
cp_ctx->key_set = 1;
DUMPL("key", key, QAT_CHACHA_KEY_SIZE);
}
if (iv != NULL) {
memcpy(cp_ctx->nonce, iv, QAT_CHACHA20_POLY1305_MAX_IVLEN);
cp_ctx->iv_set = 1;
DUMPL("IV", iv, QAT_CHACHA20_POLY1305_MAX_IVLEN);
}
cp_ctx->session_data->sessionPriority = CPA_CY_PRIORITY_HIGH;
cp_ctx->session_data->symOperation = CPA_CY_SYM_OP_ALGORITHM_CHAINING;
cp_ctx->session_data->cipherSetupData.cipherAlgorithm = CPA_CY_SYM_CIPHER_CHACHA;
cp_ctx->session_data->cipherSetupData.cipherDirection = CPA_CY_SYM_CIPHER_DIRECTION_ENCRYPT;
cp_ctx->session_data->cipherSetupData.cipherKeyLenInBytes = QAT_CHACHA_KEY_SIZE;
/* Cipher key set NULL here as it will be set later. */
cp_ctx->session_data->cipherSetupData.pCipherKey = NULL;
cp_ctx->session_data->hashSetupData.hashAlgorithm = CPA_CY_SYM_HASH_POLY;
cp_ctx->session_data->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_AUTH;
cp_ctx->session_data->hashSetupData.digestResultLenInBytes = QAT_POLY1305_DIGEST_SIZE;
cp_ctx->session_data->hashSetupData.authModeSetupData.authKey = NULL;
cp_ctx->session_data->hashSetupData.authModeSetupData.authKeyLenInBytes = 0;
cp_ctx->session_data->hashSetupData.authModeSetupData.aadLenInBytes = 0;
/* ChachaPoly performs the chacha(cipher) operation first and then
* the Poly MAC operation (hash) during encryption. */
cp_ctx->session_data->algChainOrder = CPA_CY_SYM_ALG_CHAIN_ORDER_CIPHER_THEN_HASH;
cp_ctx->session_data->digestIsAppended = CPA_FALSE;
cp_ctx->session_data->verifyDigest = CPA_FALSE;
if (!enc) {
cp_ctx->session_data->cipherSetupData.cipherDirection =
CPA_CY_SYM_CIPHER_DIRECTION_DECRYPT;
cp_ctx->session_data->algChainOrder = CPA_CY_SYM_ALG_CHAIN_ORDER_HASH_THEN_CIPHER;
}
/* Partial requests not supported for CHACHA-POLY in the driver. */
cp_ctx->session_data->partialsNotRequired = CPA_TRUE;
if (cp_ctx->opd == NULL) {
cp_ctx->opd = OPENSSL_zalloc(sizeof(template_opData));
if (cp_ctx->opd == NULL) {
WARN("memory allocation failed for symopData struct.\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT, ERR_R_MALLOC_FAILURE);
return 0;
}
/* Set cipher operation data template */
memcpy(cp_ctx->opd, &template_opData, sizeof(template_opData));
}
/* Set cipher key and IV. */
if (cp_ctx->key_set && cp_ctx->iv_set) {
if (qat_chacha20_poly1305_init_key_iv(cp_ctx, cp_ctx->cipher_key, cp_ctx->nonce)) {
/* Generate Poly1305 mac key */
if (!qat_chacha20_poly1305_mac_keygen(cp_ctx)) {
WARN("MAC keygen operation failed.\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT,
ERR_R_INTERNAL_ERROR);
return 0;
}
DEBUG("Poly1305 key generated\n");
}
cp_ctx->session_data->cipherSetupData.pCipherKey = cp_ctx->cipher_key;
if (cp_ctx->opd->pIv == NULL) {
cp_ctx->opd->pIv = qat_mem_alloc(QAT_CHACHA20_POLY1305_MAX_IVLEN, cp_ctx->qat_svm,
__FILE__, __LINE__);
if (cp_ctx->opd->pIv == NULL) {
WARN("Malloc Failure for opd->pIv.\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SESSION_DATA_INIT, ERR_R_MALLOC_FAILURE);
return 0;
}
}
memcpy(cp_ctx->opd->pIv, cp_ctx->nonce, QAT_CHACHA20_POLY1305_MAX_IVLEN);
cp_ctx->opd->ivLenInBytes = QAT_CHACHA20_POLY1305_MAX_IVLEN;
}
/* Mark session context init as set. */
cp_ctx->context_params_set = 1;
DEBUG("Chachapoly context init set.\n");
return 1;
}
/******************************************************************************
* function:
* qat_chacha20_poly1305_init(EVP_CIPHER_CTX *ctx,
* const unsigned char *inkey,
* const unsigned char *iv,
* int enc)
*
* @param ctx [IN] - pointer to existing cipher ctx
* @param inKey [IN] - cipher key
* @param iv [IN] - initialisation vector
* @param enc [IN] - 1 = encrypt, 0 = decrypt
*
* @retval 1 function succeeded
* @retval 0 function failed
*
* description:
* This function initialises the cipher parameters for this EVP context.
* This function can and will be **called multiple times** with some args
* being NULL.
*
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
int qat_chacha20_poly1305_init(QAT_PROV_CIPHER_CTX *ctx,
const unsigned char *user_key, int keylen,
const unsigned char *iv, int ivlen, int enc)
#else
static int qat_chacha20_poly1305_init(EVP_CIPHER_CTX *ctx,
const unsigned char *user_key,
const unsigned char *iv, int enc)
#endif
{
int ret = 1;
int fallback = 0;
if (unlikely(ctx == NULL)) {
WARN("cipher context is NULL.\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_INIT, QAT_R_CTX_NULL);
return 0;
}
#ifdef QAT_OPENSSL_PROVIDER
QAT_EVP_CIPHER sw_chachapoly_cipher;
QAT_PROV_CIPHER_CTX *cp_ctx = ctx;
#else
qat_chachapoly_ctx *cp_ctx = qat_chachapoly_data(ctx);
#endif
if (cp_ctx == NULL) {
WARN("chachapoly cipher data is NULL.\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_INIT, QAT_R_CHACHAPOLY_CTX_NULL);
return 0;
}
if (qat_get_sw_fallback_enabled())
fallback = 1;
#ifndef ENABLE_QAT_SMALL_PKT_OFFLOAD
fallback = 1;
#endif
/* Return 1 since it's not an error if key and IV not set. */
if (!user_key && !iv) {
DEBUG("key and IV not set.\n");
ret = 1;
goto end;
}
/* Initialize QAT session */
ret = qat_chachapoly_session_data_init(cp_ctx, user_key, iv, enc);
if (ret == 0) {
WARN("qat_chachapoly_session_data_init failed.\n");
if (fallback != 1)
QATerr(QAT_F_QAT_CHACHA20_POLY1305_INIT, ERR_R_INTERNAL_ERROR);
goto init_err;
}
DEBUG("Init complete. ctx %p, cp_ctx %p, Session data %p\n", ctx, cp_ctx,
cp_ctx->session_data);
goto end;
init_err:
if (cp_ctx->opd) {
QAT_MEM_FREE_NONZERO_BUFF(cp_ctx->opd->pIv, cp_ctx->qat_svm);
OPENSSL_clear_free(cp_ctx->opd, sizeof(template_opData));
cp_ctx->opd = NULL;
}
if (cp_ctx->session_data != NULL) {
OPENSSL_free(cp_ctx->session_data);
cp_ctx->session_data = NULL;
cp_ctx->context_params_set = 0;
}
end:
if (fallback) {
# ifndef QAT_OPENSSL_PROVIDER
EVP_CIPHER_CTX_set_cipher_data(ctx, cp_ctx->sw_ctx_cipher_data);
/* Run the software init function */
ret = EVP_CIPHER_meth_get_init(GET_SW_CHACHA_CTX)(ctx, user_key, iv, enc);
EVP_CIPHER_CTX_set_cipher_data(ctx, cp_ctx);
# else
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
sw_chachapoly_cipher = get_default_cipher_chachapoly();
if (enc) {
if (!cp_ctx->sw_ctx)
cp_ctx->sw_ctx = sw_chachapoly_cipher.newctx(ctx);
ret =
sw_chachapoly_cipher.einit(cp_ctx->sw_ctx, user_key, keylen, iv, ivlen,
params);
} else {
if (!cp_ctx->sw_ctx)
cp_ctx->sw_ctx = sw_chachapoly_cipher.newctx(ctx);
unsigned int pad = 0;
params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pad);
ret =
sw_chachapoly_cipher.dinit(cp_ctx->sw_ctx, user_key, keylen, iv, ivlen,
params);
}
# endif
}
return ret;
}
/******************************************************************************
* function:
* qat_chachapoly_setup_op_params(qat_chachapoly_ctx *cp_ctx)
*
* @param ctx [IN] - pointer to existing ctx
*
* @retval 1 function succeeded
* @retval 0 function failed
*
* description:
* This function initialises the crypto session and flatbuffer lists to be
* passed to the driver.
*
******************************************************************************/
# ifdef QAT_OPENSSL_PROVIDER
static int qat_chachapoly_setup_op_params(QAT_PROV_CIPHER_CTX *cp_ctx, int *fallback)
# else
static int qat_chachapoly_setup_op_params(qat_chachapoly_ctx *cp_ctx, int *fallback)
# endif
{
int numBuffers = 1; /* Set numBuffers to 1. (For cipher and hash operations.) */
Cpa32U bufferMetaSize = 0;
Cpa32U sctx_size = 0;
CpaStatus status;
if (cp_ctx == NULL) {
WARN("chachapoly context cipher data is NULL.\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SETUP_OP_PARAMS, QAT_R_CHACHAPOLY_CTX_NULL);
return 0;
}
if (!cp_ctx->context_params_set || !cp_ctx->key_set) {
WARN("Context params or key not set.\n");
if (qat_get_sw_fallback_enabled()) {
*fallback = 1;
}
return 0;
}
status = cpaCySymSessionCtxGetSize(qat_instance_handles[cp_ctx->inst_num],
cp_ctx->session_data, &sctx_size);
if (status != CPA_STATUS_SUCCESS) {
WARN("Failed to get SessionCtx size.\n");
if (qat_get_sw_fallback_enabled()) {
*fallback = 1;
}
return 0;
}
DEBUG("Size of session ctx = %d\n", sctx_size);
cp_ctx->session_ctx = (CpaCySymSessionCtx) qat_mem_alloc(sctx_size, cp_ctx->qat_svm,
__FILE__, __LINE__);
if (cp_ctx->session_ctx == NULL) {
WARN("Memory alloc failed for session ctx\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SETUP_OP_PARAMS, ERR_R_MALLOC_FAILURE);
return 0;
}
DUMP_SESSION_SETUP_DATA(cp_ctx->session_data);
/* Initialise Session data */
status = cpaCySymInitSession(qat_instance_handles[cp_ctx->inst_num],
qat_chachapoly_cb,
cp_ctx->session_data, cp_ctx->session_ctx);
if (status != CPA_STATUS_SUCCESS) {
WARN("cpaCySymInitSession failed! 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",
cp_ctx->inst_num,
qat_instance_details[cp_ctx->inst_num].qat_instance_info.physInstId.packageId,
__func__);
*fallback = 1;
} else
WARN("- No QAT instance available and s/w fallback not enabled.\n");
QAT_MEM_FREE_NONZERO_BUFF(cp_ctx->session_ctx, cp_ctx->qat_svm);
return 0;
} else {
if (qat_get_sw_fallback_enabled()) {
CRYPTO_QAT_LOG("Submit success qat inst_num %d device_id %d - %s\n",
cp_ctx->inst_num,
qat_instance_details[cp_ctx->inst_num].qat_instance_info.physInstId.packageId,
__func__);
}
}
/* Get buffer metasize */
status = cpaCyBufferListGetMetaSize(qat_instance_handles[cp_ctx->inst_num],
numBuffers, &bufferMetaSize);
if (status != CPA_STATUS_SUCCESS) {
WARN("cpaCyBufferListGetMetaSize failed for the instance id %d\n",
cp_ctx->inst_num);
QAT_MEM_FREE_NONZERO_BUFF(cp_ctx->session_ctx, cp_ctx->qat_svm);
if (qat_get_sw_fallback_enabled()) {
*fallback = 1;
} else
QATerr(QAT_F_QAT_CHACHAPOLY_SETUP_OP_PARAMS, ERR_R_INTERNAL_ERROR);
return 0;
}
DEBUG("Buffer MetaSize : %d\n", bufferMetaSize);
cp_ctx->pSrcBufferList.numBuffers = numBuffers;
cp_ctx->pDstBufferList.numBuffers = numBuffers;
if (bufferMetaSize) {
cp_ctx->pSrcBufferList.pPrivateMetaData =
qat_mem_alloc(bufferMetaSize, cp_ctx->qat_svm, __FILE__, __LINE__);
cp_ctx->pDstBufferList.pPrivateMetaData =
qat_mem_alloc(bufferMetaSize, cp_ctx->qat_svm,__FILE__, __LINE__);
if (cp_ctx->pSrcBufferList.pPrivateMetaData == NULL ||
cp_ctx->pDstBufferList.pPrivateMetaData == NULL) {
WARN("QMEM alloc failed for PrivateData\n");
QATerr(QAT_F_QAT_CHACHAPOLY_SETUP_OP_PARAMS, ERR_R_MALLOC_FAILURE);
QAT_MEM_FREE_NONZERO_BUFF(cp_ctx->session_ctx, cp_ctx->qat_svm);
QAT_MEM_FREE_NONZERO_BUFF(cp_ctx->pSrcBufferList.pPrivateMetaData, cp_ctx->qat_svm);
QAT_MEM_FREE_NONZERO_BUFF(cp_ctx->pDstBufferList.pPrivateMetaData, cp_ctx->qat_svm);
return 0;
}
} else {
cp_ctx->pSrcBufferList.pPrivateMetaData = NULL;
cp_ctx->pDstBufferList.pPrivateMetaData = NULL;
}
cp_ctx->pDstBufferList.pUserData = NULL;
cp_ctx->pSrcBufferList.pUserData = NULL;
cp_ctx->pSrcBufferList.pBuffers = &cp_ctx->src_buffer;
cp_ctx->pDstBufferList.pBuffers = &cp_ctx->dst_buffer;
/* Mark session init as set.*/
cp_ctx->session_init = 1;
return 1;
}
/******************************************************************************
* function:
* qat_chacha20_poly1305_tls_cipher(EVP_CIPHER_CTX *evp_ctx, unsigned char *out,
* const unsigned char *in, size_t len)
*
* @param evp_ctx [IN] - pointer to existing context
* @param out [OUT] - output buffer for transform result
* @param in [IN] - input buffer
* @param len [IN] - length of input buffer
*
* @retval 0 failure
* @retval 1 success
*
* description:
* This function performs the cryptographic transform according to the
* parameters setup during initialisation.
*
* This is the function used in the TLS case.
*
******************************************************************************/
#ifdef QAT_OPENSSL_PROVIDER
static int qat_chacha20_poly1305_tls_cipher(QAT_PROV_CIPHER_CTX * ctx, unsigned char *out,
size_t *padlen, size_t outl,
const unsigned char *in, size_t len)
#else
static int qat_chacha20_poly1305_tls_cipher(EVP_CIPHER_CTX * ctx, unsigned char *out,
const unsigned char *in, size_t len)
#endif
{
int outlen = 0;
int job_ret = 0;
int cipher_len = 0;
int plen;
int enc;
CpaStatus status;
op_done_t op_done;
thread_local_variables_t *tlv = NULL;
# ifdef QAT_OPENSSL_PROVIDER
QAT_EVP_CIPHER sw_chachapoly_cipher;
QAT_PROV_CIPHER_CTX *cp_ctx = NULL;
# else
qat_chachapoly_ctx *cp_ctx = NULL;
# endif
int fallback = 0;
#if !defined(QAT_OPENSSL_PROVIDER)
int retVal = 0;
# endif
if (unlikely(ctx == NULL)) {
WARN("ctx parameter is NULL.\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_TLS_CIPHER, QAT_R_CTX_NULL);
return -1;
}
#ifdef QAT_OPENSSL_PROVIDER
cp_ctx = ctx;
#else
cp_ctx = qat_chachapoly_data(ctx);
#endif
if (cp_ctx == NULL) {
WARN("chachapoly context cipher data is NULL.\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_TLS_CIPHER,
QAT_R_CHACHAPOLY_CTX_NULL);
return -1;
}
plen = cp_ctx->tls_payload_length;
if (len != plen + QAT_POLY1305_BLOCK_SIZE) {
WARN("Invalid tls payload length\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_TLS_CIPHER,
QAT_R_INVALID_INPUT_LENGTH);
return -1;
}
#ifdef QAT_OPENSSL_PROVIDER
enc = QAT_PROV_GET_ENC(ctx);
#else
enc = EVP_CIPHER_CTX_encrypting(ctx);
#endif
DEBUG("ctx %p, cp_ctx %p, len %zu plen %d enc: %d\n",
ctx, cp_ctx, len, plen, enc);
#ifndef ENABLE_QAT_SMALL_PKT_OFFLOAD
cp_ctx->packet_size = len;
# ifdef QAT_OPENSSL_PROVIDER
if ((len - QAT_POLY1305_BLOCK_SIZE) <=
qat_pkt_threshold_table_get_threshold(ctx->nid)) {
DEBUG("Using OpenSSL SW for Packetsize %zu\n", len);
fallback = 1;
goto cleanup;
}
# else
if ((len - QAT_POLY1305_BLOCK_SIZE) <=
qat_pkt_threshold_table_get_threshold(EVP_CIPHER_CTX_nid(ctx))) {
DEBUG("Using OpenSSL SW for Packetsize %zu\n", len);
fallback = 1;
goto cleanup;
}
# endif
#endif
/* Set chachapoly opdata params and initialise session. */
if (cp_ctx->context_params_set && !cp_ctx->session_init) {
if (!qat_chachapoly_setup_op_params(cp_ctx, &fallback)) {
WARN("chachapoly operational params setup failed.\n");
if (fallback) {
WARN("- Fallback to software mode.\n");
CRYPTO_QAT_LOG("Resubmitting request to SW - %s\n", __func__);
}
goto cleanup;
}
} else if (!cp_ctx->context_params_set) {
WARN("chachapoly operational params setup failed.\n");
if (qat_get_sw_fallback_enabled()) {
fallback = 1;
WARN("- Fallback to software mode.\n");
CRYPTO_QAT_LOG("Resubmitting request to SW - %s\n", __func__);
goto cleanup;
}
}
/* Actual message length is the input length minus the tag length. */
cipher_len = len - QAT_POLY1305_DIGEST_SIZE;
DEBUG("InputLen %zu, CipherLen %d\n", len, cipher_len);
/* Allocate buffer for HASH and CIPHER operation. */
if (!cp_ctx->qat_svm)
cp_ctx->src_buffer.pData = qaeCryptoMemAlloc(len, __FILE__, __LINE__);
else
cp_ctx->src_buffer.pData = (Cpa8U *)in;
if (cp_ctx->src_buffer.pData == NULL) {
WARN("Unable to allocate memory for TLS header\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_TLS_CIPHER, ERR_R_MALLOC_FAILURE);
goto tls_cipher_err;
}
if (!cp_ctx->qat_svm) {
cp_ctx->dst_buffer.pData = cp_ctx->src_buffer.pData;
memcpy(cp_ctx->src_buffer.pData, in, cipher_len);
} else {
cp_ctx->dst_buffer.pData = (Cpa8U *)out;
}
tlv = qat_check_create_local_variables();
if (NULL == tlv) {
WARN("could not create local variables\n");
QATerr(QAT_F_QAT_CHACHA20_POLY1305_TLS_CIPHER, ERR_R_INTERNAL_ERROR);
goto tls_cipher_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_CHACHA20_POLY1305_TLS_CIPHER,
ERR_R_INTERNAL_ERROR);
qat_cleanup_op_done(&op_done);
goto tls_cipher_err;
}
}
cp_ctx->src_buffer.dataLenInBytes = cipher_len;
cp_ctx->pSrcBufferList.pUserData = NULL;
cp_ctx->dst_buffer.dataLenInBytes = cipher_len;
cp_ctx->pDstBufferList.pUserData = NULL;
cp_ctx->opd->sessionCtx = cp_ctx->session_ctx;
/* Set messageLenToCipherInBytes to the cipher buffer length. */
cp_ctx->opd->messageLenToCipherInBytes = cipher_len;
/* Set the offset where the tag need to be written in the destination buffer. */
cp_ctx->opd->hashStartSrcOffsetInBytes = cipher_len;
/* Set AAD */
cp_ctx->opd->pAdditionalAuthData = cp_ctx->tls_aad;
cp_ctx->opd->pDigestResult = cp_ctx->mac_key;
DUMPL("pDigestResult", cp_ctx->opd->pDigestResult, QAT_CHACHA_KEY_SIZE);
DUMPL("AAD Buffer", cp_ctx->opd->pAdditionalAuthData,
cp_ctx->session_data->hashSetupData.authModeSetupData.aadLenInBytes);