1 // SPDX-License-Identifier: BSD-2-Clause
3  * Copyright (c) 2022 Huawei Technologies Co., Ltd
28 	assert(ctx && ctx->ops == &sm4_xts_ops);  in to_sm4_xts_ctx()
39 	struct sm4_xts_ctx *c = to_sm4_xts_ctx(ctx);  in sm4_xts_init()  local
41 	if (key1_len != 16 || key2_len != 16 || iv_len != sizeof(c->iv))  in sm4_xts_init()
45 		memcpy(c->iv, iv, sizeof(c->iv));  in sm4_xts_init()
48 		sm4_setkey_enc(&c->state, key1);  in sm4_xts_init()
50 		sm4_setkey_dec(&c->state, key1);  in sm4_xts_init()
52 	sm4_setkey_enc(&c->state_ek, key2);  in sm4_xts_init()
53 	sm4_setkey_dec(&c->state_dk, key2);  in sm4_xts_init()
62 	struct sm4_xts_ctx *c = to_sm4_xts_ctx(ctx);  in sm4_xts_update()  local
64 	sm4_crypt_xts(&c->state, &c->state_ek, &c->state_dk,  in sm4_xts_update()
65 		      len, c->iv, data, dst);  in sm4_xts_update()
72 	struct sm4_xts_ctx *c = to_sm4_xts_ctx(ctx);  in sm4_xts_final()  local
74 	memzero_explicit(&c->state, sizeof(c->state));  in sm4_xts_final()
75 	memzero_explicit(&c->state_ek, sizeof(c->state_ek));  in sm4_xts_final()
76 	memzero_explicit(&c->state_dk, sizeof(c->state_dk));  in sm4_xts_final()
77 	memzero_explicit(&c->iv, sizeof(c->iv));  in sm4_xts_final()
91 	dst->state = src->state;  in sm4_xts_copy_state()
92 	dst->state_ek = src->state_ek;  in sm4_xts_copy_state()
93 	dst->state_dk = src->state_dk;  in sm4_xts_copy_state()
94 	memcpy(dst->iv, src->iv, sizeof(src->iv));  in sm4_xts_copy_state()
107 	struct sm4_xts_ctx *c = NULL;  in crypto_sm4_xts_alloc_ctx()  local
109 	c = calloc(1, sizeof(*c));  in crypto_sm4_xts_alloc_ctx()
110 	if (!c)  in crypto_sm4_xts_alloc_ctx()
113 	c->ctx.ops = &sm4_xts_ops;  in crypto_sm4_xts_alloc_ctx()
114 	*ctx_ret = &c->ctx;  in crypto_sm4_xts_alloc_ctx()