[CRYPTO] lzo: Add LZO compression algorithm support
Add LZO compression algorithm support
Signed-off-by: Zoltan Sogor <weth@inf.u-szeged.hu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 40ae92c..4fd14e4 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -536,6 +536,14 @@
Authenc: Combined mode wrapper for IPsec.
This is required for IPSec.
+config CRYPTO_LZO
+ tristate "LZO compression algorithm"
+ select CRYPTO_ALGAPI
+ select LZO_COMPRESS
+ select LZO_DECOMPRESS
+ help
+ This is the LZO algorithm.
+
source "drivers/crypto/Kconfig"
endif # if CRYPTO
diff --git a/crypto/Makefile b/crypto/Makefile
index 957343c..83532ac 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -55,6 +55,7 @@
obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o
+obj-$(CONFIG_CRYPTO_LZO) += lzo.o
obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
diff --git a/crypto/lzo.c b/crypto/lzo.c
new file mode 100644
index 0000000..48c3288
--- /dev/null
+++ b/crypto/lzo.c
@@ -0,0 +1,106 @@
+/*
+ * Cryptographic API.
+ *
+ * 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/lzo.h>
+
+struct lzo_ctx {
+ void *lzo_comp_mem;
+};
+
+static int lzo_init(struct crypto_tfm *tfm)
+{
+ struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->lzo_comp_mem = vmalloc(LZO1X_MEM_COMPRESS);
+ if (!ctx->lzo_comp_mem)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void lzo_exit(struct crypto_tfm *tfm)
+{
+ struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ vfree(ctx->lzo_comp_mem);
+}
+
+static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+ size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
+ int err;
+
+ err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx->lzo_comp_mem);
+
+ if (err != LZO_E_OK)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return 0;
+}
+
+static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ int err;
+ size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
+
+ err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
+
+ if (err != LZO_E_OK)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return 0;
+
+}
+
+static struct crypto_alg alg = {
+ .cra_name = "lzo",
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_ctxsize = sizeof(struct lzo_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(alg.cra_list),
+ .cra_init = lzo_init,
+ .cra_exit = lzo_exit,
+ .cra_u = { .compress = {
+ .coa_compress = lzo_compress,
+ .coa_decompress = lzo_decompress } }
+};
+
+static int __init init(void)
+{
+ return crypto_register_alg(&alg);
+}
+
+static void __exit fini(void)
+{
+ crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZO Compression Algorithm");
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index c8d3e60..943a514 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -84,7 +84,7 @@
"cast6", "arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",
"arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",
"khazad", "wp512", "wp384", "wp256", "tnepres", "xeta", "fcrypt",
- "camellia", "seed", "salsa20", NULL
+ "camellia", "seed", "salsa20", "lzo", NULL
};
static void hexdump(unsigned char *buf, unsigned int len)
@@ -1292,6 +1292,8 @@
test_comp("deflate", deflate_comp_tv_template,
deflate_decomp_tv_template, DEFLATE_COMP_TEST_VECTORS,
DEFLATE_DECOMP_TEST_VECTORS);
+ test_comp("lzo", lzo_comp_tv_template, lzo_decomp_tv_template,
+ LZO_COMP_TEST_VECTORS, LZO_DECOMP_TEST_VECTORS);
test_hash("crc32c", crc32c_tv_template, CRC32C_TEST_VECTORS);
test_hash("hmac(md5)", hmac_md5_tv_template,
HMAC_MD5_TEST_VECTORS);
@@ -1550,6 +1552,11 @@
AES_GCM_DEC_TEST_VECTORS);
break;
+ case 36:
+ test_comp("lzo", lzo_comp_tv_template, lzo_decomp_tv_template,
+ LZO_COMP_TEST_VECTORS, LZO_DECOMP_TEST_VECTORS);
+ break;
+
case 100:
test_hash("hmac(md5)", hmac_md5_tv_template,
HMAC_MD5_TEST_VECTORS);
diff --git a/crypto/tcrypt.h b/crypto/tcrypt.h
index d3c380f..175f26a 100644
--- a/crypto/tcrypt.h
+++ b/crypto/tcrypt.h
@@ -7461,6 +7461,88 @@
};
/*
+ * LZO test vectors (null-terminated strings).
+ */
+#define LZO_COMP_TEST_VECTORS 2
+#define LZO_DECOMP_TEST_VECTORS 2
+
+static struct comp_testvec lzo_comp_tv_template[] = {
+ {
+ .inlen = 70,
+ .outlen = 46,
+ .input = "Join us now and share the software "
+ "Join us now and share the software ",
+ .output = { 0x00, 0x0d, 0x4a, 0x6f, 0x69, 0x6e, 0x20, 0x75,
+ 0x73, 0x20, 0x6e, 0x6f, 0x77, 0x20, 0x61, 0x6e,
+ 0x64, 0x20, 0x73, 0x68, 0x61, 0x72, 0x65, 0x20,
+ 0x74, 0x68, 0x65, 0x20, 0x73, 0x6f, 0x66, 0x74,
+ 0x77, 0x70, 0x01, 0x01, 0x4a, 0x6f, 0x69, 0x6e,
+ 0x3d, 0x88, 0x00, 0x11, 0x00, 0x00 },
+ }, {
+ .inlen = 159,
+ .outlen = 133,
+ .input = "This document describes a compression method based on the LZO "
+ "compression algorithm. This document defines the application of "
+ "the LZO algorithm used in UBIFS.",
+ .output = { 0x00, 0x2b, 0x54, 0x68, 0x69, 0x73, 0x20, 0x64,
+ 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x20,
+ 0x64, 0x65, 0x73, 0x63, 0x72, 0x69, 0x62, 0x65,
+ 0x73, 0x20, 0x61, 0x20, 0x63, 0x6f, 0x6d, 0x70,
+ 0x72, 0x65, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x20,
+ 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x20, 0x62,
+ 0x61, 0x73, 0x65, 0x64, 0x20, 0x6f, 0x6e, 0x20,
+ 0x74, 0x68, 0x65, 0x20, 0x4c, 0x5a, 0x4f, 0x2b,
+ 0x8c, 0x00, 0x0d, 0x61, 0x6c, 0x67, 0x6f, 0x72,
+ 0x69, 0x74, 0x68, 0x6d, 0x2e, 0x20, 0x20, 0x54,
+ 0x68, 0x69, 0x73, 0x2a, 0x54, 0x01, 0x02, 0x66,
+ 0x69, 0x6e, 0x65, 0x73, 0x94, 0x06, 0x05, 0x61,
+ 0x70, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x74, 0x76,
+ 0x0a, 0x6f, 0x66, 0x88, 0x02, 0x60, 0x09, 0x27,
+ 0xf0, 0x00, 0x0c, 0x20, 0x75, 0x73, 0x65, 0x64,
+ 0x20, 0x69, 0x6e, 0x20, 0x55, 0x42, 0x49, 0x46,
+ 0x53, 0x2e, 0x11, 0x00, 0x00 },
+ },
+};
+
+static struct comp_testvec lzo_decomp_tv_template[] = {
+ {
+ .inlen = 133,
+ .outlen = 159,
+ .input = { 0x00, 0x2b, 0x54, 0x68, 0x69, 0x73, 0x20, 0x64,
+ 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x20,
+ 0x64, 0x65, 0x73, 0x63, 0x72, 0x69, 0x62, 0x65,
+ 0x73, 0x20, 0x61, 0x20, 0x63, 0x6f, 0x6d, 0x70,
+ 0x72, 0x65, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x20,
+ 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x20, 0x62,
+ 0x61, 0x73, 0x65, 0x64, 0x20, 0x6f, 0x6e, 0x20,
+ 0x74, 0x68, 0x65, 0x20, 0x4c, 0x5a, 0x4f, 0x2b,
+ 0x8c, 0x00, 0x0d, 0x61, 0x6c, 0x67, 0x6f, 0x72,
+ 0x69, 0x74, 0x68, 0x6d, 0x2e, 0x20, 0x20, 0x54,
+ 0x68, 0x69, 0x73, 0x2a, 0x54, 0x01, 0x02, 0x66,
+ 0x69, 0x6e, 0x65, 0x73, 0x94, 0x06, 0x05, 0x61,
+ 0x70, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x74, 0x76,
+ 0x0a, 0x6f, 0x66, 0x88, 0x02, 0x60, 0x09, 0x27,
+ 0xf0, 0x00, 0x0c, 0x20, 0x75, 0x73, 0x65, 0x64,
+ 0x20, 0x69, 0x6e, 0x20, 0x55, 0x42, 0x49, 0x46,
+ 0x53, 0x2e, 0x11, 0x00, 0x00 },
+ .output = "This document describes a compression method based on the LZO "
+ "compression algorithm. This document defines the application of "
+ "the LZO algorithm used in UBIFS.",
+ }, {
+ .inlen = 46,
+ .outlen = 70,
+ .input = { 0x00, 0x0d, 0x4a, 0x6f, 0x69, 0x6e, 0x20, 0x75,
+ 0x73, 0x20, 0x6e, 0x6f, 0x77, 0x20, 0x61, 0x6e,
+ 0x64, 0x20, 0x73, 0x68, 0x61, 0x72, 0x65, 0x20,
+ 0x74, 0x68, 0x65, 0x20, 0x73, 0x6f, 0x66, 0x74,
+ 0x77, 0x70, 0x01, 0x01, 0x4a, 0x6f, 0x69, 0x6e,
+ 0x3d, 0x88, 0x00, 0x11, 0x00, 0x00 },
+ .output = "Join us now and share the software "
+ "Join us now and share the software ",
+ },
+};
+
+/*
* Michael MIC test vectors from IEEE 802.11i
*/
#define MICHAEL_MIC_TEST_VECTORS 6