aboutsummaryrefslogtreecommitdiffstats
path: root/crypto
diff options
context:
space:
mode:
authorChanho Min <chanho.min@lge.com>2013-07-08 16:01:51 -0700
committerSimon Shields <keepcalm444@gmail.com>2016-06-12 21:20:14 +1000
commitaf358596dc922c13d1cf7319513e3371258bfe04 (patch)
tree88cf71915203a4443d5df185ff535c2e27f7cd39 /crypto
parente587fc7e1422e54b05f8b92b601bc09ebe5ca22b (diff)
downloadkernel_samsung_smdk4412-af358596dc922c13d1cf7319513e3371258bfe04.tar.gz
kernel_samsung_smdk4412-af358596dc922c13d1cf7319513e3371258bfe04.tar.bz2
kernel_samsung_smdk4412-af358596dc922c13d1cf7319513e3371258bfe04.zip
crypto: add lz4 Cryptographic API
Add support for lz4 and lz4hc compression algorithm using the lib/lz4/* codebase. [akpm@linux-foundation.org: fix warnings] Signed-off-by: Chanho Min <chanho.min@lge.com> Cc: "Darrick J. Wong" <djwong@us.ibm.com> Cc: Bob Pearson <rpearson@systemfabricworks.com> Cc: Richard Weinberger <richard@nod.at> Cc: Herbert Xu <herbert@gondor.hengli.com.au> Cc: Yann Collet <yann.collet.73@gmail.com> Cc: Kyungsik Lee <kyungsik.lee@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Conflicts: crypto/Kconfig crypto/Makefile Change-Id: Ic3495647e3a902a12ae1b1951ff9bd89011696e0
Diffstat (limited to 'crypto')
-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 0d1211036df..efd8816ee7c 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -865,6 +865,22 @@ config CRYPTO_LZO
help
This is the LZO algorithm.
+config CRYPTO_LZ4
+ tristate "LZ4 compression algorithm"
+ select CRYPTO_ALGAPI
+ select LZ4_COMPRESS
+ select LZ4_DECOMPRESS
+ help
+ This is the LZ4 algorithm.
+
+config CRYPTO_LZ4HC
+ tristate "LZ4HC compression algorithm"
+ select CRYPTO_ALGAPI
+ select LZ4HC_COMPRESS
+ select LZ4_DECOMPRESS
+ help
+ This is the LZ4 high compression mode algorithm.
+
comment "Random Number Generation"
config CRYPTO_ANSI_CPRNG
diff --git a/crypto/Makefile b/crypto/Makefile
index 69c46ed4ff3..a6c3035c45d 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -85,6 +85,8 @@ obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o
obj-$(CONFIG_CRYPTO_LZO) += lzo.o
+obj-$(CONFIG_CRYPTO_LZ4) += lz4.o
+obj-$(CONFIG_CRYPTO_LZ4HC) += lz4hc.o
obj-$(CONFIG_CRYPTO_RNG2) += rng.o
obj-$(CONFIG_CRYPTO_RNG2) += krng.o
obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
diff --git a/crypto/lz4.c b/crypto/lz4.c
new file mode 100644
index 00000000000..4586dd15b0d
--- /dev/null
+++ b/crypto/lz4.c
@@ -0,0 +1,106 @@
+/*
+ * Cryptographic API.
+ *
+ * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/vmalloc.h>
+#include <linux/lz4.h>
+
+struct lz4_ctx {
+ void *lz4_comp_mem;
+};
+
+static int lz4_init(struct crypto_tfm *tfm)
+{
+ struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->lz4_comp_mem = vmalloc(LZ4_MEM_COMPRESS);
+ if (!ctx->lz4_comp_mem)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void lz4_exit(struct crypto_tfm *tfm)
+{
+ struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
+ vfree(ctx->lz4_comp_mem);
+}
+
+static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
+ size_t tmp_len = *dlen;
+ int err;
+
+ err = lz4_compress(src, slen, dst, &tmp_len, ctx->lz4_comp_mem);
+
+ if (err < 0)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return 0;
+}
+
+static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ int err;
+ size_t tmp_len = *dlen;
+ size_t __slen = slen;
+
+ err = lz4_decompress(src, &__slen, dst, tmp_len);
+ if (err < 0)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return err;
+}
+
+static struct crypto_alg alg_lz4 = {
+ .cra_name = "lz4",
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_ctxsize = sizeof(struct lz4_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(alg_lz4.cra_list),
+ .cra_init = lz4_init,
+ .cra_exit = lz4_exit,
+ .cra_u = { .compress = {
+ .coa_compress = lz4_compress_crypto,
+ .coa_decompress = lz4_decompress_crypto } }
+};
+
+static int __init lz4_mod_init(void)
+{
+ return crypto_register_alg(&alg_lz4);
+}
+
+static void __exit lz4_mod_fini(void)
+{
+ crypto_unregister_alg(&alg_lz4);
+}
+
+module_init(lz4_mod_init);
+module_exit(lz4_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZ4 Compression Algorithm");
diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
new file mode 100644
index 00000000000..151ba31d34e
--- /dev/null
+++ b/crypto/lz4hc.c
@@ -0,0 +1,106 @@
+/*
+ * Cryptographic API.
+ *
+ * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/vmalloc.h>
+#include <linux/lz4.h>
+
+struct lz4hc_ctx {
+ void *lz4hc_comp_mem;
+};
+
+static int lz4hc_init(struct crypto_tfm *tfm)
+{
+ struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->lz4hc_comp_mem = vmalloc(LZ4HC_MEM_COMPRESS);
+ if (!ctx->lz4hc_comp_mem)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void lz4hc_exit(struct crypto_tfm *tfm)
+{
+ struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ vfree(ctx->lz4hc_comp_mem);
+}
+
+static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
+ size_t tmp_len = *dlen;
+ int err;
+
+ err = lz4hc_compress(src, slen, dst, &tmp_len, ctx->lz4hc_comp_mem);
+
+ if (err < 0)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return 0;
+}
+
+static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ int err;
+ size_t tmp_len = *dlen;
+ size_t __slen = slen;
+
+ err = lz4_decompress(src, &__slen, dst, tmp_len);
+ if (err < 0)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return err;
+}
+
+static struct crypto_alg alg_lz4hc = {
+ .cra_name = "lz4hc",
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_ctxsize = sizeof(struct lz4hc_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(alg_lz4hc.cra_list),
+ .cra_init = lz4hc_init,
+ .cra_exit = lz4hc_exit,
+ .cra_u = { .compress = {
+ .coa_compress = lz4hc_compress_crypto,
+ .coa_decompress = lz4hc_decompress_crypto } }
+};
+
+static int __init lz4hc_mod_init(void)
+{
+ return crypto_register_alg(&alg_lz4hc);
+}
+
+static void __exit lz4hc_mod_fini(void)
+{
+ crypto_unregister_alg(&alg_lz4hc);
+}
+
+module_init(lz4hc_mod_init);
+module_exit(lz4hc_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZ4HC Compression Algorithm");