Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Cryptographic API.
4 */
5
6#include <linux/init.h>
7#include <linux/module.h>
8#include <linux/crypto.h>
9#include <linux/vmalloc.h>
10#include <linux/mm.h>
11#include <linux/lzo.h>
12#include <crypto/internal/scompress.h>
13
14struct lzo_ctx {
15 void *lzo_comp_mem;
16};
17
18static void *lzo_alloc_ctx(struct crypto_scomp *tfm)
19{
20 void *ctx;
21
22 ctx = kvmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
23 if (!ctx)
24 return ERR_PTR(-ENOMEM);
25
26 return ctx;
27}
28
29static int lzo_init(struct crypto_tfm *tfm)
30{
31 struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
32
33 ctx->lzo_comp_mem = lzo_alloc_ctx(NULL);
34 if (IS_ERR(ctx->lzo_comp_mem))
35 return -ENOMEM;
36
37 return 0;
38}
39
40static void lzo_free_ctx(struct crypto_scomp *tfm, void *ctx)
41{
42 kvfree(ctx);
43}
44
45static void lzo_exit(struct crypto_tfm *tfm)
46{
47 struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
48
49 lzo_free_ctx(NULL, ctx->lzo_comp_mem);
50}
51
52static int __lzo_compress(const u8 *src, unsigned int slen,
53 u8 *dst, unsigned int *dlen, void *ctx)
54{
55 size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
56 int err;
57
58 err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx);
59
60 if (err != LZO_E_OK)
61 return -EINVAL;
62
63 *dlen = tmp_len;
64 return 0;
65}
66
67static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,
68 unsigned int slen, u8 *dst, unsigned int *dlen)
69{
70 struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
71
72 return __lzo_compress(src, slen, dst, dlen, ctx->lzo_comp_mem);
73}
74
75static int lzo_scompress(struct crypto_scomp *tfm, const u8 *src,
76 unsigned int slen, u8 *dst, unsigned int *dlen,
77 void *ctx)
78{
79 return __lzo_compress(src, slen, dst, dlen, ctx);
80}
81
82static int __lzo_decompress(const u8 *src, unsigned int slen,
83 u8 *dst, unsigned int *dlen)
84{
85 int err;
86 size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
87
88 err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
89
90 if (err != LZO_E_OK)
91 return -EINVAL;
92
93 *dlen = tmp_len;
94 return 0;
95}
96
97static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
98 unsigned int slen, u8 *dst, unsigned int *dlen)
99{
100 return __lzo_decompress(src, slen, dst, dlen);
101}
102
103static int lzo_sdecompress(struct crypto_scomp *tfm, const u8 *src,
104 unsigned int slen, u8 *dst, unsigned int *dlen,
105 void *ctx)
106{
107 return __lzo_decompress(src, slen, dst, dlen);
108}
109
110static struct crypto_alg alg = {
111 .cra_name = "lzo",
112 .cra_driver_name = "lzo-generic",
113 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
114 .cra_ctxsize = sizeof(struct lzo_ctx),
115 .cra_module = THIS_MODULE,
116 .cra_init = lzo_init,
117 .cra_exit = lzo_exit,
118 .cra_u = { .compress = {
119 .coa_compress = lzo_compress,
120 .coa_decompress = lzo_decompress } }
121};
122
123static struct scomp_alg scomp = {
124 .alloc_ctx = lzo_alloc_ctx,
125 .free_ctx = lzo_free_ctx,
126 .compress = lzo_scompress,
127 .decompress = lzo_sdecompress,
128 .base = {
129 .cra_name = "lzo",
130 .cra_driver_name = "lzo-scomp",
131 .cra_module = THIS_MODULE,
132 }
133};
134
135static int __init lzo_mod_init(void)
136{
137 int ret;
138
139 ret = crypto_register_alg(&alg);
140 if (ret)
141 return ret;
142
143 ret = crypto_register_scomp(&scomp);
144 if (ret) {
145 crypto_unregister_alg(&alg);
146 return ret;
147 }
148
149 return ret;
150}
151
152static void __exit lzo_mod_fini(void)
153{
154 crypto_unregister_alg(&alg);
155 crypto_unregister_scomp(&scomp);
156}
157
158subsys_initcall(lzo_mod_init);
159module_exit(lzo_mod_fini);
160
161MODULE_LICENSE("GPL");
162MODULE_DESCRIPTION("LZO Compression Algorithm");
163MODULE_ALIAS_CRYPTO("lzo");
1/*
2 * Cryptographic API.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
16 *
17 */
18
19#include <linux/init.h>
20#include <linux/module.h>
21#include <linux/crypto.h>
22#include <linux/vmalloc.h>
23#include <linux/mm.h>
24#include <linux/lzo.h>
25#include <crypto/internal/scompress.h>
26
27struct lzo_ctx {
28 void *lzo_comp_mem;
29};
30
31static void *lzo_alloc_ctx(struct crypto_scomp *tfm)
32{
33 void *ctx;
34
35 ctx = kvmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
36 if (!ctx)
37 return ERR_PTR(-ENOMEM);
38
39 return ctx;
40}
41
42static int lzo_init(struct crypto_tfm *tfm)
43{
44 struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
45
46 ctx->lzo_comp_mem = lzo_alloc_ctx(NULL);
47 if (IS_ERR(ctx->lzo_comp_mem))
48 return -ENOMEM;
49
50 return 0;
51}
52
53static void lzo_free_ctx(struct crypto_scomp *tfm, void *ctx)
54{
55 kvfree(ctx);
56}
57
58static void lzo_exit(struct crypto_tfm *tfm)
59{
60 struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
61
62 lzo_free_ctx(NULL, ctx->lzo_comp_mem);
63}
64
65static int __lzo_compress(const u8 *src, unsigned int slen,
66 u8 *dst, unsigned int *dlen, void *ctx)
67{
68 size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
69 int err;
70
71 err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx);
72
73 if (err != LZO_E_OK)
74 return -EINVAL;
75
76 *dlen = tmp_len;
77 return 0;
78}
79
80static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,
81 unsigned int slen, u8 *dst, unsigned int *dlen)
82{
83 struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
84
85 return __lzo_compress(src, slen, dst, dlen, ctx->lzo_comp_mem);
86}
87
88static int lzo_scompress(struct crypto_scomp *tfm, const u8 *src,
89 unsigned int slen, u8 *dst, unsigned int *dlen,
90 void *ctx)
91{
92 return __lzo_compress(src, slen, dst, dlen, ctx);
93}
94
95static int __lzo_decompress(const u8 *src, unsigned int slen,
96 u8 *dst, unsigned int *dlen)
97{
98 int err;
99 size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
100
101 err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
102
103 if (err != LZO_E_OK)
104 return -EINVAL;
105
106 *dlen = tmp_len;
107 return 0;
108}
109
110static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
111 unsigned int slen, u8 *dst, unsigned int *dlen)
112{
113 return __lzo_decompress(src, slen, dst, dlen);
114}
115
116static int lzo_sdecompress(struct crypto_scomp *tfm, const u8 *src,
117 unsigned int slen, u8 *dst, unsigned int *dlen,
118 void *ctx)
119{
120 return __lzo_decompress(src, slen, dst, dlen);
121}
122
123static struct crypto_alg alg = {
124 .cra_name = "lzo",
125 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
126 .cra_ctxsize = sizeof(struct lzo_ctx),
127 .cra_module = THIS_MODULE,
128 .cra_init = lzo_init,
129 .cra_exit = lzo_exit,
130 .cra_u = { .compress = {
131 .coa_compress = lzo_compress,
132 .coa_decompress = lzo_decompress } }
133};
134
135static struct scomp_alg scomp = {
136 .alloc_ctx = lzo_alloc_ctx,
137 .free_ctx = lzo_free_ctx,
138 .compress = lzo_scompress,
139 .decompress = lzo_sdecompress,
140 .base = {
141 .cra_name = "lzo",
142 .cra_driver_name = "lzo-scomp",
143 .cra_module = THIS_MODULE,
144 }
145};
146
147static int __init lzo_mod_init(void)
148{
149 int ret;
150
151 ret = crypto_register_alg(&alg);
152 if (ret)
153 return ret;
154
155 ret = crypto_register_scomp(&scomp);
156 if (ret) {
157 crypto_unregister_alg(&alg);
158 return ret;
159 }
160
161 return ret;
162}
163
164static void __exit lzo_mod_fini(void)
165{
166 crypto_unregister_alg(&alg);
167 crypto_unregister_scomp(&scomp);
168}
169
170module_init(lzo_mod_init);
171module_exit(lzo_mod_fini);
172
173MODULE_LICENSE("GPL");
174MODULE_DESCRIPTION("LZO Compression Algorithm");
175MODULE_ALIAS_CRYPTO("lzo");