forked from ~ljy/RK356X_SDK_RELEASE

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hc
2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/crypto/ofb.c
....@@ -8,40 +8,17 @@
88  */
99 
1010 #include <crypto/algapi.h>
11
+#include <crypto/internal/cipher.h>
1112 #include <crypto/internal/skcipher.h>
1213 #include <linux/err.h>
1314 #include <linux/init.h>
1415 #include <linux/kernel.h>
1516 #include <linux/module.h>
16
-#include <linux/scatterlist.h>
17
-#include <linux/slab.h>
18
-
19
-struct crypto_ofb_ctx {
20
-	struct crypto_cipher *child;
21
-};
22
-
23
-
24
-static int crypto_ofb_setkey(struct crypto_skcipher *parent, const u8 *key,
25
-			     unsigned int keylen)
26
-{
27
-	struct crypto_ofb_ctx *ctx = crypto_skcipher_ctx(parent);
28
-	struct crypto_cipher *child = ctx->child;
29
-	int err;
30
-
31
-	crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
32
-	crypto_cipher_set_flags(child, crypto_skcipher_get_flags(parent) &
33
-				       CRYPTO_TFM_REQ_MASK);
34
-	err = crypto_cipher_setkey(child, key, keylen);
35
-	crypto_skcipher_set_flags(parent, crypto_cipher_get_flags(child) &
36
-				  CRYPTO_TFM_RES_MASK);
37
-	return err;
38
-}
3917 
4018 static int crypto_ofb_crypt(struct skcipher_request *req)
4119 {
4220 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
43
-	struct crypto_ofb_ctx *ctx = crypto_skcipher_ctx(tfm);
44
-	struct crypto_cipher *cipher = ctx->child;
21
+	struct crypto_cipher *cipher = skcipher_cipher_simple(tfm);
4522 	const unsigned int bsize = crypto_cipher_blocksize(cipher);
4623 	struct skcipher_walk walk;
4724 	int err;
....@@ -73,75 +50,17 @@
7350 	return err;
7451 }
7552 
76
-static int crypto_ofb_init_tfm(struct crypto_skcipher *tfm)
77
-{
78
-	struct skcipher_instance *inst = skcipher_alg_instance(tfm);
79
-	struct crypto_spawn *spawn = skcipher_instance_ctx(inst);
80
-	struct crypto_ofb_ctx *ctx = crypto_skcipher_ctx(tfm);
81
-	struct crypto_cipher *cipher;
82
-
83
-	cipher = crypto_spawn_cipher(spawn);
84
-	if (IS_ERR(cipher))
85
-		return PTR_ERR(cipher);
86
-
87
-	ctx->child = cipher;
88
-	return 0;
89
-}
90
-
91
-static void crypto_ofb_exit_tfm(struct crypto_skcipher *tfm)
92
-{
93
-	struct crypto_ofb_ctx *ctx = crypto_skcipher_ctx(tfm);
94
-
95
-	crypto_free_cipher(ctx->child);
96
-}
97
-
98
-static void crypto_ofb_free(struct skcipher_instance *inst)
99
-{
100
-	crypto_drop_skcipher(skcipher_instance_ctx(inst));
101
-	kfree(inst);
102
-}
103
-
10453 static int crypto_ofb_create(struct crypto_template *tmpl, struct rtattr **tb)
10554 {
10655 	struct skcipher_instance *inst;
107
-	struct crypto_attr_type *algt;
108
-	struct crypto_spawn *spawn;
10956 	struct crypto_alg *alg;
110
-	u32 mask;
11157 	int err;
11258 
113
-	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER);
114
-	if (err)
115
-		return err;
59
+	inst = skcipher_alloc_instance_simple(tmpl, tb);
60
+	if (IS_ERR(inst))
61
+		return PTR_ERR(inst);
11662 
117
-	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
118
-	if (!inst)
119
-		return -ENOMEM;
120
-
121
-	algt = crypto_get_attr_type(tb);
122
-	err = PTR_ERR(algt);
123
-	if (IS_ERR(algt))
124
-		goto err_free_inst;
125
-
126
-	mask = CRYPTO_ALG_TYPE_MASK |
127
-		crypto_requires_off(algt->type, algt->mask,
128
-				    CRYPTO_ALG_NEED_FALLBACK);
129
-
130
-	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, mask);
131
-	err = PTR_ERR(alg);
132
-	if (IS_ERR(alg))
133
-		goto err_free_inst;
134
-
135
-	spawn = skcipher_instance_ctx(inst);
136
-	err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst),
137
-				CRYPTO_ALG_TYPE_MASK);
138
-	crypto_mod_put(alg);
139
-	if (err)
140
-		goto err_free_inst;
141
-
142
-	err = crypto_inst_setname(skcipher_crypto_instance(inst), "ofb", alg);
143
-	if (err)
144
-		goto err_drop_spawn;
63
+	alg = skcipher_ialg_simple(inst);
14564 
14665 	/* OFB mode is a stream cipher. */
14766 	inst->alg.base.cra_blocksize = 1;
....@@ -152,36 +71,14 @@
15271 	 */
15372 	inst->alg.chunksize = alg->cra_blocksize;
15473 
155
-	inst->alg.base.cra_priority = alg->cra_priority;
156
-	inst->alg.base.cra_alignmask = alg->cra_alignmask;
157
-
158
-	inst->alg.ivsize = alg->cra_blocksize;
159
-	inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize;
160
-	inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize;
161
-
162
-	inst->alg.base.cra_ctxsize = sizeof(struct crypto_ofb_ctx);
163
-
164
-	inst->alg.init = crypto_ofb_init_tfm;
165
-	inst->alg.exit = crypto_ofb_exit_tfm;
166
-
167
-	inst->alg.setkey = crypto_ofb_setkey;
16874 	inst->alg.encrypt = crypto_ofb_crypt;
16975 	inst->alg.decrypt = crypto_ofb_crypt;
17076 
171
-	inst->free = crypto_ofb_free;
172
-
17377 	err = skcipher_register_instance(tmpl, inst);
17478 	if (err)
175
-		goto err_drop_spawn;
79
+		inst->free(inst);
17680 
177
-out:
17881 	return err;
179
-
180
-err_drop_spawn:
181
-	crypto_drop_spawn(spawn);
182
-err_free_inst:
183
-	kfree(inst);
184
-	goto out;
18582 }
18683 
18784 static struct crypto_template crypto_ofb_tmpl = {
....@@ -200,9 +97,10 @@
20097 	crypto_unregister_template(&crypto_ofb_tmpl);
20198 }
20299 
203
-module_init(crypto_ofb_module_init);
100
+subsys_initcall(crypto_ofb_module_init);
204101 module_exit(crypto_ofb_module_exit);
205102 
206103 MODULE_LICENSE("GPL");
207
-MODULE_DESCRIPTION("OFB block cipher algorithm");
104
+MODULE_DESCRIPTION("OFB block cipher mode of operation");
208105 MODULE_ALIAS_CRYPTO("ofb");
106
+MODULE_IMPORT_NS(CRYPTO_INTERNAL);