This commit adds modular exponentiation to Intel QuickAssist Technology
driver. For capabilities or limitations refer to qat.rst or
qat_asym_capabilities.h.
Signed-off-by: Arek Kusztal <arkadiuszx.kusz...@intel.com>
---
doc/guides/cryptodevs/qat.rst | 2 +
drivers/crypto/qat/qat_asym.c | 117 +++++++++++++++++++++++++++--
drivers/crypto/qat/qat_asym.h | 9 ++-
drivers/crypto/qat/qat_asym_capabilities.h | 18 ++++-
drivers/crypto/qat/qat_asym_pmd.c | 1 +
5 files changed, 137 insertions(+), 10 deletions(-)
diff --git a/doc/guides/cryptodevs/qat.rst b/doc/guides/cryptodevs/qat.rst
index 767171d..9c0196f 100644
--- a/doc/guides/cryptodevs/qat.rst
+++ b/doc/guides/cryptodevs/qat.rst
@@ -105,6 +105,8 @@ Asymmetric Crypto Service on QAT
The QAT Asym PMD has support for:
+* ``Modular exponentiation``
+
Limitations
~~~~~~~~~~~
diff --git a/drivers/crypto/qat/qat_asym.c b/drivers/crypto/qat/qat_asym.c
index 0b6ef4a..04a35eb 100644
--- a/drivers/crypto/qat/qat_asym.c
+++ b/drivers/crypto/qat/qat_asym.c
@@ -11,7 +11,7 @@
#define qat_asym_sz_2param(arg) (arg, sizeof(arg)/sizeof(*arg))
-static int __rte_unused qat_asym_get_sz_and_func_id(const uint32_t arr[][2],
+static int qat_asym_get_sz_and_func_id(const uint32_t arr[][2],
size_t arr_sz, size_t *size, uint32_t *func_id) {
size_t i;
@@ -26,7 +26,7 @@ static int __rte_unused qat_asym_get_sz_and_func_id(const
uint32_t arr[][2],
}
static void qat_asym_build_req_tmpl(void *sess_private_data,
- struct rte_crypto_asym_xform __rte_unused *xform) {
+ struct rte_crypto_asym_xform *xform) {
struct icp_qat_fw_pke_request *qat_req;
struct qat_asym_session *session = sess_private_data;
@@ -47,9 +47,14 @@ static void qat_asym_build_req_tmpl(void *sess_private_data,
qat_req->resrvd1 = 0;
qat_req->resrvd2 = 0;
qat_req->next_req_adr = 0;
+
+ if (xform->xform_type == RTE_CRYPTO_ASYM_XFORM_MODEX) {
+ qat_req->output_param_count = 1;
+ qat_req->input_param_count = 3;
+ }
}
-static size_t __rte_unused max_of(int n, ...)
+static size_t max_of(int n, ...)
{
va_list args;
size_t len = 0, num;
@@ -68,6 +73,32 @@ static size_t __rte_unused max_of(int n, ...)
return len;
}
+static int qat_asym_check_nonzero(rte_crypto_param n)
+{
+ if (n.length < 8) {
+ /* Not a case for any cryptograpic function */
+ size_t i;
+ if (n.data[n.length - 1] == 0x0) {
+ for (i = 0; i < n.length - 1; i++)
+ if (n.data[i] != 0x0)
+ break;
+ if (i == n.length - 1)
+ return QAT_ASYM_ERROR_DIVIDE_BY_ZERO;
+ }
+ } else if (*(uint64_t *)&n.data[
+ n.length - 8] == 0) {
+ /* Very likely it is zeroed modulus */
+ size_t i;
+ for (i = 0; i < n.length - 8; i++)
+ if (n.data[i] != 0x0)
+ break;
+ if (i == n.length - 8)
+ return QAT_ASYM_ERROR_DIVIDE_BY_ZERO;
+ }
+
+ return 0;
+}
+
int
qat_asym_build_request(void *in_op,
uint8_t *out_msg,
@@ -76,27 +107,64 @@ qat_asym_build_request(void *in_op,
{
struct qat_asym_session *ctx;
struct rte_crypto_op *op = (struct rte_crypto_op *)in_op;
- struct rte_crypto_asym_op __rte_unused *asym_op = op->asym;
+ struct rte_crypto_asym_op *asym_op = op->asym;
struct icp_qat_fw_pke_request *qat_req =
(struct icp_qat_fw_pke_request *)out_msg;
struct qat_asym_op_cookie *cookie =
(struct qat_asym_op_cookie *)op_cookie;
+ uint64_t err = 0;
+ size_t alg_size;
+ size_t alg_size_in_bytes;
+ uint32_t func_id;
ctx = (struct qat_asym_session *)get_asym_session_private_data(
op->asym->session, cryptodev_qat_asym_driver_id);
rte_mov64((uint8_t *)qat_req, (const uint8_t *)&(ctx->req_tmpl));
- qat_req->pke_mid.opaque = (uint64_t)(uintptr_t)op;
+ qat_req->pke_mid.opaque = (uint64_t)(uintptr_t)op;
qat_req->pke_mid.src_data_addr = cookie->input_addr;
qat_req->pke_mid.dest_data_addr = cookie->output_addr;
- goto error;
+ if (ctx->alg == QAT_PKE_MODEXP) {
+ err = qat_asym_check_nonzero(ctx->sess_alg_params.mod_exp.n);
+ if (err)
+ goto error;
+
+ alg_size_in_bytes = max_of(3, asym_op->modex.base.length,
+ ctx->sess_alg_params.mod_exp.e.length,
+ ctx->sess_alg_params.mod_exp.n.length);
+ alg_size = alg_size_in_bytes << 3;
+
+ if (qat_asym_get_sz_and_func_id(MOD_EXP_SIZE,
+ sizeof(MOD_EXP_SIZE)/sizeof(*MOD_EXP_SIZE),
+ &alg_size, &func_id)) {
+ err = QAT_ASYM_ERROR_INVALID_MODEXP_PARAM;
+ goto error;
+ }
+
+ alg_size_in_bytes = alg_size >> 3;
+ rte_memcpy(cookie->input_array[0] + alg_size_in_bytes -
+ asym_op->modex.base.length
+ , asym_op->modex.base.data,
+ asym_op->modex.base.length);
+ rte_memcpy(cookie->input_array[1] + alg_size_in_bytes -
+ ctx->sess_alg_params.mod_exp.e.length
+ , ctx->sess_alg_params.mod_exp.e.data,
+ ctx->sess_alg_params.mod_exp.e.length);
+ rte_memcpy(cookie->input_array[2] + alg_size_in_bytes -
+ ctx->sess_alg_params.mod_exp.n.length,
+ ctx->sess_alg_params.mod_exp.n.data,
+ ctx->sess_alg_params.mod_exp.n.length);
+ cookie->alg_size = alg_size;
+ qat_req->pke_hdr.cd_pars.func_id = func_id;
+ }
+
return 0;
error:
qat_req->output_param_count = 0;
qat_req->input_param_count = 0;
qat_req->pke_hdr.service_type = ICP_QAT_FW_COMN_REQ_NULL;
- cookie->error |= QAT_ASYM_ERROR_DEVIDE_BY_ZERO;
+ cookie->error |= err;
return 0;
}
@@ -105,11 +173,17 @@ void
qat_asym_process_response(void **op, uint8_t *resp,
void *op_cookie)
{
+ struct qat_asym_session *ctx;
struct icp_qat_fw_pke_resp *resp_msg =
(struct icp_qat_fw_pke_resp *)resp;
struct rte_crypto_op *rx_op = (struct rte_crypto_op *)(uintptr_t)
(resp_msg->opaque);
+ struct rte_crypto_asym_op *asym_op = rx_op->asym;
struct qat_asym_op_cookie *cookie = op_cookie;
+ size_t alg_size, alg_size_in_bytes;
+
+ ctx = (struct qat_asym_session *)get_asym_session_private_data(
+ rx_op->asym->session, cryptodev_qat_asym_driver_id);
*op = rx_op;
rx_op->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
@@ -126,6 +200,24 @@ qat_asym_process_response(void **op, uint8_t *resp,
cookie->error = 0;
rx_op->status = RTE_CRYPTO_OP_STATUS_ERROR;
}
+
+ if (ctx->alg == QAT_PKE_MODEXP) {
+ alg_size = cookie->alg_size;
+ alg_size_in_bytes = alg_size >> 3;
+ uint8_t *modexp_result = asym_op->modex.result.data;
+
+ rte_memcpy(modexp_result +
+ (asym_op->modex.result.length -
ctx->sess_alg_params.mod_exp.n.length),
+ cookie->output_array[0] + alg_size_in_bytes
+ - ctx->sess_alg_params.mod_exp.n.length,
+ ctx->sess_alg_params.mod_exp.n.length
+ );
+
+ memset(cookie->input_array[0], 0x0, alg_size_in_bytes);
+ memset(cookie->input_array[1], 0x0, alg_size_in_bytes);
+ memset(cookie->input_array[2], 0x0, alg_size_in_bytes);
+ memset(cookie->output_array[0], 0x0, alg_size_in_bytes);
+ }
}
int
@@ -135,6 +227,7 @@ qat_asym_session_configure(struct rte_cryptodev *dev,
struct rte_mempool *mempool)
{
void *sess_private_data;
+ struct qat_asym_session *session;
if (rte_mempool_get(mempool, &sess_private_data)) {
QAT_LOG(ERR,
@@ -142,8 +235,16 @@ qat_asym_session_configure(struct rte_cryptodev *dev,
return -ENOMEM;
}
- qat_asym_build_req_tmpl(sess_private_data, xform);
+ session = sess_private_data;
+ if (xform->xform_type == RTE_CRYPTO_ASYM_XFORM_MODEX) {
+ session->sess_alg_params.mod_exp.e = xform->modex.exponent;
+ session->sess_alg_params.mod_exp.n = xform->modex.modulus;
+ session->alg = QAT_PKE_MODEXP;
+ if (xform->modex.exponent.length == 0 ||
xform->modex.modulus.length == 0)
+ return -EINVAL;
+ }
+ qat_asym_build_req_tmpl(sess_private_data, xform);
set_asym_session_private_data(sess, dev->driver_id,
sess_private_data);
diff --git a/drivers/crypto/qat/qat_asym.h b/drivers/crypto/qat/qat_asym.h
index 673493d..e6c3ce3 100644
--- a/drivers/crypto/qat/qat_asym.h
+++ b/drivers/crypto/qat/qat_asym.h
@@ -17,7 +17,8 @@ typedef uint64_t large_int_ptr;
#define QAT_PKE_MAX_LN_SIZE 512
#define _PKE_ALIGN_ __attribute__((__aligned__(8)))
-#define QAT_ASYM_ERROR_DEVIDE_BY_ZERO 0x01
+#define QAT_ASYM_ERROR_DIVIDE_BY_ZERO 0x01
+#define QAT_ASYM_ERROR_INVALID_MODEXP_PARAM 0x02
struct qat_asym_op_cookie {
size_t alg_size;
@@ -42,6 +43,12 @@ struct qat_asym_session {
enum qat_asym_alg alg;
struct icp_qat_fw_pke_request req_tmpl;
uint64_t flags;
+ union {
+ struct {
+ rte_crypto_param n;
+ rte_crypto_param e;
+ } mod_exp;
+ } sess_alg_params;
};
int
diff --git a/drivers/crypto/qat/qat_asym_capabilities.h
b/drivers/crypto/qat/qat_asym_capabilities.h
index b50e061..1d6323f 100644
--- a/drivers/crypto/qat/qat_asym_capabilities.h
+++ b/drivers/crypto/qat/qat_asym_capabilities.h
@@ -5,6 +5,22 @@
#ifndef _QAT_ASYM_CAPABILITIES_H_
#define _QAT_ASYM_CAPABILITIES_H_
-#define QAT_BASE_GEN1_ASYM_CAPABILITIES
+#define QAT_BASE_GEN1_ASYM_CAPABILITIES
\
+ { /* modexp */
\
+ .op = RTE_CRYPTO_OP_TYPE_ASYMMETRIC,
\
+ {.asym = {
\
+ .xform_capa = {
\
+ .xform_type = RTE_CRYPTO_ASYM_XFORM_MODEX,
\
+ .op_types = 0,
\
+ {
\
+ .modlen = {
\
+ .min = 1,
\
+ .max = 512,
\
+ .increment = 1
\
+ }, }
\
+ }
\
+ },
\
+ }
\
+ }
\
#endif /* _QAT_ASYM_CAPABILITIES_H_ */
diff --git a/drivers/crypto/qat/qat_asym_pmd.c
b/drivers/crypto/qat/qat_asym_pmd.c
index 9ebaa8d..a12b695 100644
--- a/drivers/crypto/qat/qat_asym_pmd.c
+++ b/drivers/crypto/qat/qat_asym_pmd.c
@@ -14,6 +14,7 @@
uint8_t cryptodev_qat_asym_driver_id;
static const struct rte_cryptodev_capabilities qat_gen1_asym_capabilities[] = {
+ QAT_BASE_GEN1_ASYM_CAPABILITIES,
RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
};
--
2.1.0
