1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * Cryptographic API. 2 * Cryptographic API.
4 * 3 *
5 * Copyright (c) 2013 Chanho Min <chanho.min@l 4 * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
>> 5 *
>> 6 * This program is free software; you can redistribute it and/or modify it
>> 7 * under the terms of the GNU General Public License version 2 as published by
>> 8 * the Free Software Foundation.
>> 9 *
>> 10 * This program is distributed in the hope that it will be useful, but WITHOUT
>> 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> 13 * more details.
>> 14 *
>> 15 * You should have received a copy of the GNU General Public License along with
>> 16 * this program; if not, write to the Free Software Foundation, Inc., 51
>> 17 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
>> 18 *
6 */ 19 */
7 #include <linux/init.h> 20 #include <linux/init.h>
8 #include <linux/module.h> 21 #include <linux/module.h>
9 #include <linux/crypto.h> 22 #include <linux/crypto.h>
10 #include <linux/vmalloc.h> 23 #include <linux/vmalloc.h>
11 #include <linux/lz4.h> 24 #include <linux/lz4.h>
12 #include <crypto/internal/scompress.h> 25 #include <crypto/internal/scompress.h>
13 26
14 struct lz4hc_ctx { 27 struct lz4hc_ctx {
15 void *lz4hc_comp_mem; 28 void *lz4hc_comp_mem;
16 }; 29 };
17 30
18 static void *lz4hc_alloc_ctx(struct crypto_sco 31 static void *lz4hc_alloc_ctx(struct crypto_scomp *tfm)
19 { 32 {
20 void *ctx; 33 void *ctx;
21 34
22 ctx = vmalloc(LZ4HC_MEM_COMPRESS); 35 ctx = vmalloc(LZ4HC_MEM_COMPRESS);
23 if (!ctx) 36 if (!ctx)
24 return ERR_PTR(-ENOMEM); 37 return ERR_PTR(-ENOMEM);
25 38
26 return ctx; 39 return ctx;
27 } 40 }
28 41
29 static int lz4hc_init(struct crypto_tfm *tfm) 42 static int lz4hc_init(struct crypto_tfm *tfm)
30 { 43 {
31 struct lz4hc_ctx *ctx = crypto_tfm_ctx 44 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
32 45
33 ctx->lz4hc_comp_mem = lz4hc_alloc_ctx( 46 ctx->lz4hc_comp_mem = lz4hc_alloc_ctx(NULL);
34 if (IS_ERR(ctx->lz4hc_comp_mem)) 47 if (IS_ERR(ctx->lz4hc_comp_mem))
35 return -ENOMEM; 48 return -ENOMEM;
36 49
37 return 0; 50 return 0;
38 } 51 }
39 52
40 static void lz4hc_free_ctx(struct crypto_scomp 53 static void lz4hc_free_ctx(struct crypto_scomp *tfm, void *ctx)
41 { 54 {
42 vfree(ctx); 55 vfree(ctx);
43 } 56 }
44 57
45 static void lz4hc_exit(struct crypto_tfm *tfm) 58 static void lz4hc_exit(struct crypto_tfm *tfm)
46 { 59 {
47 struct lz4hc_ctx *ctx = crypto_tfm_ctx 60 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
48 61
49 lz4hc_free_ctx(NULL, ctx->lz4hc_comp_m 62 lz4hc_free_ctx(NULL, ctx->lz4hc_comp_mem);
50 } 63 }
51 64
52 static int __lz4hc_compress_crypto(const u8 *s 65 static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen,
53 u8 *dst, un 66 u8 *dst, unsigned int *dlen, void *ctx)
54 { 67 {
55 int out_len = LZ4_compress_HC(src, dst !! 68 size_t tmp_len = *dlen;
56 *dlen, LZ4HC_DEFAULT_CLEVEL, c !! 69 int err;
>> 70
>> 71 err = lz4hc_compress(src, slen, dst, &tmp_len, ctx);
57 72
58 if (!out_len) !! 73 if (err < 0)
59 return -EINVAL; 74 return -EINVAL;
60 75
61 *dlen = out_len; !! 76 *dlen = tmp_len;
62 return 0; 77 return 0;
63 } 78 }
64 79
65 static int lz4hc_scompress(struct crypto_scomp 80 static int lz4hc_scompress(struct crypto_scomp *tfm, const u8 *src,
66 unsigned int slen, 81 unsigned int slen, u8 *dst, unsigned int *dlen,
67 void *ctx) 82 void *ctx)
68 { 83 {
69 return __lz4hc_compress_crypto(src, sl 84 return __lz4hc_compress_crypto(src, slen, dst, dlen, ctx);
70 } 85 }
71 86
72 static int lz4hc_compress_crypto(struct crypto 87 static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
73 unsigned int 88 unsigned int slen, u8 *dst,
74 unsigned int 89 unsigned int *dlen)
75 { 90 {
76 struct lz4hc_ctx *ctx = crypto_tfm_ctx 91 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
77 92
78 return __lz4hc_compress_crypto(src, sl 93 return __lz4hc_compress_crypto(src, slen, dst, dlen,
79 ctx->l 94 ctx->lz4hc_comp_mem);
80 } 95 }
81 96
82 static int __lz4hc_decompress_crypto(const u8 97 static int __lz4hc_decompress_crypto(const u8 *src, unsigned int slen,
83 u8 *dst, 98 u8 *dst, unsigned int *dlen, void *ctx)
84 { 99 {
85 int out_len = LZ4_decompress_safe(src, !! 100 int err;
>> 101 size_t tmp_len = *dlen;
>> 102 size_t __slen = slen;
86 103
87 if (out_len < 0) !! 104 err = lz4_decompress_unknownoutputsize(src, __slen, dst, &tmp_len);
>> 105 if (err < 0)
88 return -EINVAL; 106 return -EINVAL;
89 107
90 *dlen = out_len; !! 108 *dlen = tmp_len;
91 return 0; !! 109 return err;
92 } 110 }
93 111
94 static int lz4hc_sdecompress(struct crypto_sco 112 static int lz4hc_sdecompress(struct crypto_scomp *tfm, const u8 *src,
95 unsigned int slen 113 unsigned int slen, u8 *dst, unsigned int *dlen,
96 void *ctx) 114 void *ctx)
97 { 115 {
98 return __lz4hc_decompress_crypto(src, 116 return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
99 } 117 }
100 118
101 static int lz4hc_decompress_crypto(struct cryp 119 static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
102 unsigned in 120 unsigned int slen, u8 *dst,
103 unsigned in 121 unsigned int *dlen)
104 { 122 {
105 return __lz4hc_decompress_crypto(src, 123 return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
106 } 124 }
107 125
108 static struct crypto_alg alg_lz4hc = { 126 static struct crypto_alg alg_lz4hc = {
109 .cra_name = "lz4hc", 127 .cra_name = "lz4hc",
110 .cra_driver_name = "lz4hc-gener <<
111 .cra_flags = CRYPTO_ALG_T 128 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
112 .cra_ctxsize = sizeof(struc 129 .cra_ctxsize = sizeof(struct lz4hc_ctx),
113 .cra_module = THIS_MODULE, 130 .cra_module = THIS_MODULE,
>> 131 .cra_list = LIST_HEAD_INIT(alg_lz4hc.cra_list),
114 .cra_init = lz4hc_init, 132 .cra_init = lz4hc_init,
115 .cra_exit = lz4hc_exit, 133 .cra_exit = lz4hc_exit,
116 .cra_u = { .compress 134 .cra_u = { .compress = {
117 .coa_compress = lz4hc_compre 135 .coa_compress = lz4hc_compress_crypto,
118 .coa_decompress = lz4hc_decomp 136 .coa_decompress = lz4hc_decompress_crypto } }
119 }; 137 };
120 138
121 static struct scomp_alg scomp = { 139 static struct scomp_alg scomp = {
122 .alloc_ctx = lz4hc_alloc_ 140 .alloc_ctx = lz4hc_alloc_ctx,
123 .free_ctx = lz4hc_free_c 141 .free_ctx = lz4hc_free_ctx,
124 .compress = lz4hc_scompr 142 .compress = lz4hc_scompress,
125 .decompress = lz4hc_sdecom 143 .decompress = lz4hc_sdecompress,
126 .base = { 144 .base = {
127 .cra_name = "lz4hc", 145 .cra_name = "lz4hc",
128 .cra_driver_name = "lz4hc-scom 146 .cra_driver_name = "lz4hc-scomp",
129 .cra_module = THIS_MODULE 147 .cra_module = THIS_MODULE,
130 } 148 }
131 }; 149 };
132 150
133 static int __init lz4hc_mod_init(void) 151 static int __init lz4hc_mod_init(void)
134 { 152 {
135 int ret; 153 int ret;
136 154
137 ret = crypto_register_alg(&alg_lz4hc); 155 ret = crypto_register_alg(&alg_lz4hc);
138 if (ret) 156 if (ret)
139 return ret; 157 return ret;
140 158
141 ret = crypto_register_scomp(&scomp); 159 ret = crypto_register_scomp(&scomp);
142 if (ret) { 160 if (ret) {
143 crypto_unregister_alg(&alg_lz4 161 crypto_unregister_alg(&alg_lz4hc);
144 return ret; 162 return ret;
145 } 163 }
146 164
147 return ret; 165 return ret;
148 } 166 }
149 167
150 static void __exit lz4hc_mod_fini(void) 168 static void __exit lz4hc_mod_fini(void)
151 { 169 {
152 crypto_unregister_alg(&alg_lz4hc); 170 crypto_unregister_alg(&alg_lz4hc);
153 crypto_unregister_scomp(&scomp); 171 crypto_unregister_scomp(&scomp);
154 } 172 }
155 173
156 subsys_initcall(lz4hc_mod_init); !! 174 module_init(lz4hc_mod_init);
157 module_exit(lz4hc_mod_fini); 175 module_exit(lz4hc_mod_fini);
158 176
159 MODULE_LICENSE("GPL"); 177 MODULE_LICENSE("GPL");
160 MODULE_DESCRIPTION("LZ4HC Compression Algorith 178 MODULE_DESCRIPTION("LZ4HC Compression Algorithm");
161 MODULE_ALIAS_CRYPTO("lz4hc"); 179 MODULE_ALIAS_CRYPTO("lz4hc");
162 180
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