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-rw-r--r--crypto/Kconfig16
-rw-r--r--crypto/Makefile2
-rw-r--r--crypto/lz4.c106
-rw-r--r--crypto/lz4hc.c106
4 files changed, 230 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 904ffe838567..69ce573f1224 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1336,6 +1336,22 @@ config CRYPTO_842
1336 help 1336 help
1337 This is the 842 algorithm. 1337 This is the 842 algorithm.
1338 1338
1339config CRYPTO_LZ4
1340 tristate "LZ4 compression algorithm"
1341 select CRYPTO_ALGAPI
1342 select LZ4_COMPRESS
1343 select LZ4_DECOMPRESS
1344 help
1345 This is the LZ4 algorithm.
1346
1347config CRYPTO_LZ4HC
1348 tristate "LZ4HC compression algorithm"
1349 select CRYPTO_ALGAPI
1350 select LZ4HC_COMPRESS
1351 select LZ4_DECOMPRESS
1352 help
1353 This is the LZ4 high compression mode algorithm.
1354
1339comment "Random Number Generation" 1355comment "Random Number Generation"
1340 1356
1341config CRYPTO_ANSI_CPRNG 1357config CRYPTO_ANSI_CPRNG
diff --git a/crypto/Makefile b/crypto/Makefile
index 62af87df8729..2d5ed08a239f 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -86,6 +86,8 @@ obj-$(CONFIG_CRYPTO_CRC32) += crc32.o
86obj-$(CONFIG_CRYPTO_CRCT10DIF) += crct10dif.o 86obj-$(CONFIG_CRYPTO_CRCT10DIF) += crct10dif.o
87obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o 87obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o
88obj-$(CONFIG_CRYPTO_LZO) += lzo.o 88obj-$(CONFIG_CRYPTO_LZO) += lzo.o
89obj-$(CONFIG_CRYPTO_LZ4) += lz4.o
90obj-$(CONFIG_CRYPTO_LZ4HC) += lz4hc.o
89obj-$(CONFIG_CRYPTO_842) += 842.o 91obj-$(CONFIG_CRYPTO_842) += 842.o
90obj-$(CONFIG_CRYPTO_RNG2) += rng.o 92obj-$(CONFIG_CRYPTO_RNG2) += rng.o
91obj-$(CONFIG_CRYPTO_RNG2) += krng.o 93obj-$(CONFIG_CRYPTO_RNG2) += krng.o
diff --git a/crypto/lz4.c b/crypto/lz4.c
new file mode 100644
index 000000000000..4586dd15b0d8
--- /dev/null
+++ b/crypto/lz4.c
@@ -0,0 +1,106 @@
1/*
2 * Cryptographic API.
3 *
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 *
19 */
20
21#include <linux/init.h>
22#include <linux/module.h>
23#include <linux/crypto.h>
24#include <linux/vmalloc.h>
25#include <linux/lz4.h>
26
27struct lz4_ctx {
28 void *lz4_comp_mem;
29};
30
31static int lz4_init(struct crypto_tfm *tfm)
32{
33 struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
34
35 ctx->lz4_comp_mem = vmalloc(LZ4_MEM_COMPRESS);
36 if (!ctx->lz4_comp_mem)
37 return -ENOMEM;
38
39 return 0;
40}
41
42static void lz4_exit(struct crypto_tfm *tfm)
43{
44 struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
45 vfree(ctx->lz4_comp_mem);
46}
47
48static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
49 unsigned int slen, u8 *dst, unsigned int *dlen)
50{
51 struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
52 size_t tmp_len = *dlen;
53 int err;
54
55 err = lz4_compress(src, slen, dst, &tmp_len, ctx->lz4_comp_mem);
56
57 if (err < 0)
58 return -EINVAL;
59
60 *dlen = tmp_len;
61 return 0;
62}
63
64static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
65 unsigned int slen, u8 *dst, unsigned int *dlen)
66{
67 int err;
68 size_t tmp_len = *dlen;
69 size_t __slen = slen;
70
71 err = lz4_decompress(src, &__slen, dst, tmp_len);
72 if (err < 0)
73 return -EINVAL;
74
75 *dlen = tmp_len;
76 return err;
77}
78
79static struct crypto_alg alg_lz4 = {
80 .cra_name = "lz4",
81 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
82 .cra_ctxsize = sizeof(struct lz4_ctx),
83 .cra_module = THIS_MODULE,
84 .cra_list = LIST_HEAD_INIT(alg_lz4.cra_list),
85 .cra_init = lz4_init,
86 .cra_exit = lz4_exit,
87 .cra_u = { .compress = {
88 .coa_compress = lz4_compress_crypto,
89 .coa_decompress = lz4_decompress_crypto } }
90};
91
92static int __init lz4_mod_init(void)
93{
94 return crypto_register_alg(&alg_lz4);
95}
96
97static void __exit lz4_mod_fini(void)
98{
99 crypto_unregister_alg(&alg_lz4);
100}
101
102module_init(lz4_mod_init);
103module_exit(lz4_mod_fini);
104
105MODULE_LICENSE("GPL");
106MODULE_DESCRIPTION("LZ4 Compression Algorithm");
diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
new file mode 100644
index 000000000000..151ba31d34e3
--- /dev/null
+++ b/crypto/lz4hc.c
@@ -0,0 +1,106 @@
1/*
2 * Cryptographic API.
3 *
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 *
19 */
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/crypto.h>
23#include <linux/vmalloc.h>
24#include <linux/lz4.h>
25
26struct lz4hc_ctx {
27 void *lz4hc_comp_mem;
28};
29
30static int lz4hc_init(struct crypto_tfm *tfm)
31{
32 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
33
34 ctx->lz4hc_comp_mem = vmalloc(LZ4HC_MEM_COMPRESS);
35 if (!ctx->lz4hc_comp_mem)
36 return -ENOMEM;
37
38 return 0;
39}
40
41static void lz4hc_exit(struct crypto_tfm *tfm)
42{
43 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
44
45 vfree(ctx->lz4hc_comp_mem);
46}
47
48static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
49 unsigned int slen, u8 *dst, unsigned int *dlen)
50{
51 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
52 size_t tmp_len = *dlen;
53 int err;
54
55 err = lz4hc_compress(src, slen, dst, &tmp_len, ctx->lz4hc_comp_mem);
56
57 if (err < 0)
58 return -EINVAL;
59
60 *dlen = tmp_len;
61 return 0;
62}
63
64static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
65 unsigned int slen, u8 *dst, unsigned int *dlen)
66{
67 int err;
68 size_t tmp_len = *dlen;
69 size_t __slen = slen;
70
71 err = lz4_decompress(src, &__slen, dst, tmp_len);
72 if (err < 0)
73 return -EINVAL;
74
75 *dlen = tmp_len;
76 return err;
77}
78
79static struct crypto_alg alg_lz4hc = {
80 .cra_name = "lz4hc",
81 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
82 .cra_ctxsize = sizeof(struct lz4hc_ctx),
83 .cra_module = THIS_MODULE,
84 .cra_list = LIST_HEAD_INIT(alg_lz4hc.cra_list),
85 .cra_init = lz4hc_init,
86 .cra_exit = lz4hc_exit,
87 .cra_u = { .compress = {
88 .coa_compress = lz4hc_compress_crypto,
89 .coa_decompress = lz4hc_decompress_crypto } }
90};
91
92static int __init lz4hc_mod_init(void)
93{
94 return crypto_register_alg(&alg_lz4hc);
95}
96
97static void __exit lz4hc_mod_fini(void)
98{
99 crypto_unregister_alg(&alg_lz4hc);
100}
101
102module_init(lz4hc_mod_init);
103module_exit(lz4hc_mod_fini);
104
105MODULE_LICENSE("GPL");
106MODULE_DESCRIPTION("LZ4HC Compression Algorithm");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 04:18:45 -0500