66 static int __sm2_set_pub_key(struct mpi_ec_ctx *ec,
69 static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec)  in sm2_ec_ctx_init()  argument
89 	ec->Q = mpi_point_new(0);  in sm2_ec_ctx_init()
90 	if (!ec->Q)  in sm2_ec_ctx_init()
94 	ec->G = mpi_point_new(0);  in sm2_ec_ctx_init()
95 	if (!ec->G) {  in sm2_ec_ctx_init()
96 		mpi_point_release(ec->Q);  in sm2_ec_ctx_init()
100 	mpi_set(ec->G->x, x);  in sm2_ec_ctx_init()
101 	mpi_set(ec->G->y, y);  in sm2_ec_ctx_init()
102 	mpi_set_ui(ec->G->z, 1);  in sm2_ec_ctx_init()
105 	ec->n = mpi_scanval(ecp->n);  in sm2_ec_ctx_init()
106 	if (!ec->n) {  in sm2_ec_ctx_init()
107 		mpi_point_release(ec->Q);  in sm2_ec_ctx_init()
108 		mpi_point_release(ec->G);  in sm2_ec_ctx_init()
112 	ec->h = ecp->h;  in sm2_ec_ctx_init()
113 	ec->name = ecp->desc;  in sm2_ec_ctx_init()
114 	mpi_ec_init(ec, ecp->model, ecp->dialect, 0, p, a, b);  in sm2_ec_ctx_init()
129 static void sm2_ec_ctx_deinit(struct mpi_ec_ctx *ec)  in sm2_ec_ctx_deinit()  argument
131 	mpi_ec_deinit(ec);  in sm2_ec_ctx_deinit()
133 	memset(ec, 0, sizeof(*ec));  in sm2_ec_ctx_deinit()
250 				     MPI_POINT point, struct mpi_ec_ctx *ec,  in sm2_z_digest_update_point()  argument
259 	ret = mpi_ec_get_affine(x, y, point, ec) ? -EINVAL :  in sm2_z_digest_update_point()
271 	struct mpi_ec_ctx *ec;  in sm2_compute_z_digest()  local
277 	ec = kmalloc(sizeof(*ec), GFP_KERNEL);  in sm2_compute_z_digest()
278 	if (!ec)  in sm2_compute_z_digest()
281 	err = sm2_ec_ctx_init(ec);  in sm2_compute_z_digest()
285 	err = __sm2_set_pub_key(ec, key, keylen);  in sm2_compute_z_digest()
293 	pbytes = MPI_NBYTES(ec->p);  in sm2_compute_z_digest()
309 	err = sm2_z_digest_update(desc, ec->a, pbytes) ?:  in sm2_compute_z_digest()
310 	      sm2_z_digest_update(desc, ec->b, pbytes) ?:  in sm2_compute_z_digest()
311 	      sm2_z_digest_update_point(desc, ec->G, ec, pbytes) ?:  in sm2_compute_z_digest()
312 	      sm2_z_digest_update_point(desc, ec->Q, ec, pbytes);  in sm2_compute_z_digest()
319 	sm2_ec_ctx_deinit(ec);  in sm2_compute_z_digest()
321 	kfree(ec);  in sm2_compute_z_digest()
326 static int _sm2_verify(struct mpi_ec_ctx *ec, MPI hash, MPI sig_r, MPI sig_s)  in _sm2_verify()  argument
340 	if (mpi_cmp_ui(sig_r, 1) < 0 || mpi_cmp(sig_r, ec->n) > 0 ||  in _sm2_verify()
341 		mpi_cmp_ui(sig_s, 1) < 0 || mpi_cmp(sig_s, ec->n) > 0) {  in _sm2_verify()
346 	mpi_addm(t, sig_r, sig_s, ec->n);  in _sm2_verify()
352 	mpi_ec_mul_point(&sG, sig_s, ec->G, ec);  in _sm2_verify()
353 	mpi_ec_mul_point(&tP, t, ec->Q, ec);  in _sm2_verify()
354 	mpi_ec_add_points(&sG, &sG, &tP, ec);  in _sm2_verify()
355 	if (mpi_ec_get_affine(x1, y1, &sG, ec))  in _sm2_verify()
359 	mpi_addm(t, hash, x1, ec->n);  in _sm2_verify()
381 	struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);  in sm2_verify()  local
387 	if (unlikely(!ec->Q))  in sm2_verify()
410 	ret = _sm2_verify(ec, hash, sig.sig_r, sig.sig_s);  in sm2_verify()
423 	struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);  in sm2_set_pub_key()  local
425 	return __sm2_set_pub_key(ec, key, keylen);  in sm2_set_pub_key()
429 static int __sm2_set_pub_key(struct mpi_ec_ctx *ec,  in __sm2_set_pub_key()  argument
441 	rc = sm2_ecc_os2ec(ec->Q, a);  in __sm2_set_pub_key()
455 	struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);  in sm2_init_tfm()  local
457 	return sm2_ec_ctx_init(ec);  in sm2_init_tfm()
462 	struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);  in sm2_exit_tfm()  local
464 	sm2_ec_ctx_deinit(ec);  in sm2_exit_tfm()