linux/3.2: add XZ decompressor support to crypto
SVN-Revision: 30792
This commit is contained in:
Gabor Juhos
parent
5a471e23ad
commit
b8bc1eca45
3 changed files with 149 additions and 2 deletions
|
|
@ -487,6 +487,7 @@ CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
|
|||
# CONFIG_CRYPTO_WP512 is not set
|
||||
# CONFIG_CRYPTO_XCBC is not set
|
||||
# CONFIG_CRYPTO_XTS is not set
|
||||
# CONFIG_CRYPTO_XZ is not set
|
||||
# CONFIG_CRYPTO_ZLIB is not set
|
||||
# CONFIG_CRYSTALHD is not set
|
||||
# CONFIG_CS5535_MFGPT is not set
|
||||
|
|
|
|||
|
|
@ -0,0 +1,146 @@
|
|||
--- a/crypto/Kconfig
|
||||
+++ b/crypto/Kconfig
|
||||
@@ -886,6 +886,13 @@ config CRYPTO_LZO
|
||||
help
|
||||
This is the LZO algorithm.
|
||||
|
||||
+config CRYPTO_XZ
|
||||
+ tristate "XZ compression algorithm"
|
||||
+ select CRYPTO_ALGAPI
|
||||
+ select XZ_DEC
|
||||
+ help
|
||||
+ This is the XZ algorithm. Only decompression is supported for now.
|
||||
+
|
||||
comment "Random Number Generation"
|
||||
|
||||
config CRYPTO_ANSI_CPRNG
|
||||
--- a/crypto/Makefile
|
||||
+++ b/crypto/Makefile
|
||||
@@ -82,6 +82,7 @@ obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += mich
|
||||
obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
|
||||
obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o
|
||||
obj-$(CONFIG_CRYPTO_LZO) += lzo.o
|
||||
+obj-$(CONFIG_CRYPTO_XZ) += xz.o
|
||||
obj-$(CONFIG_CRYPTO_RNG2) += rng.o
|
||||
obj-$(CONFIG_CRYPTO_RNG2) += krng.o
|
||||
obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
|
||||
--- /dev/null
|
||||
+++ b/crypto/xz.c
|
||||
@@ -0,0 +1,117 @@
|
||||
+/*
|
||||
+ * Cryptographic API.
|
||||
+ *
|
||||
+ * XZ decompression support.
|
||||
+ *
|
||||
+ * Copyright (c) 2012 Gabor Juhos <juhosg@openwrt.org>
|
||||
+ *
|
||||
+ * 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.
|
||||
+ *
|
||||
+ */
|
||||
+#include <linux/init.h>
|
||||
+#include <linux/module.h>
|
||||
+#include <linux/crypto.h>
|
||||
+#include <linux/xz.h>
|
||||
+#include <linux/interrupt.h>
|
||||
+#include <linux/mm.h>
|
||||
+#include <linux/net.h>
|
||||
+
|
||||
+struct xz_comp_ctx {
|
||||
+ struct xz_dec *decomp_state;
|
||||
+ struct xz_buf decomp_buf;
|
||||
+};
|
||||
+
|
||||
+static int crypto_xz_decomp_init(struct xz_comp_ctx *ctx)
|
||||
+{
|
||||
+ ctx->decomp_state = xz_dec_init(XZ_SINGLE, 0);
|
||||
+ if (!ctx->decomp_state)
|
||||
+ return -ENOMEM;
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static void crypto_xz_decomp_exit(struct xz_comp_ctx *ctx)
|
||||
+{
|
||||
+ xz_dec_end(ctx->decomp_state);
|
||||
+}
|
||||
+
|
||||
+static int crypto_xz_init(struct crypto_tfm *tfm)
|
||||
+{
|
||||
+ struct xz_comp_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
+
|
||||
+ return crypto_xz_decomp_init(ctx);
|
||||
+}
|
||||
+
|
||||
+static void crypto_xz_exit(struct crypto_tfm *tfm)
|
||||
+{
|
||||
+ struct xz_comp_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
+
|
||||
+ crypto_xz_decomp_exit(ctx);
|
||||
+}
|
||||
+
|
||||
+static int crypto_xz_compress(struct crypto_tfm *tfm, const u8 *src,
|
||||
+ unsigned int slen, u8 *dst, unsigned int *dlen)
|
||||
+{
|
||||
+ return -EOPNOTSUPP;
|
||||
+}
|
||||
+
|
||||
+static int crypto_xz_decompress(struct crypto_tfm *tfm, const u8 *src,
|
||||
+ unsigned int slen, u8 *dst, unsigned int *dlen)
|
||||
+{
|
||||
+ struct xz_comp_ctx *dctx = crypto_tfm_ctx(tfm);
|
||||
+ struct xz_buf *xz_buf = &dctx->decomp_buf;
|
||||
+ int ret;
|
||||
+
|
||||
+ memset(xz_buf, '\0', sizeof(struct xz_buf));
|
||||
+
|
||||
+ xz_buf->in = (u8 *) src;
|
||||
+ xz_buf->in_pos = 0;
|
||||
+ xz_buf->in_size = slen;
|
||||
+ xz_buf->out = (u8 *) dst;
|
||||
+ xz_buf->out_pos = 0;
|
||||
+ xz_buf->out_size = *dlen;
|
||||
+
|
||||
+ ret = xz_dec_run(dctx->decomp_state, xz_buf);
|
||||
+ if (ret != XZ_STREAM_END) {
|
||||
+ ret = -EINVAL;
|
||||
+ goto out;
|
||||
+ }
|
||||
+
|
||||
+ *dlen = xz_buf->out_pos;
|
||||
+ ret = 0;
|
||||
+
|
||||
+out:
|
||||
+ return ret;
|
||||
+}
|
||||
+
|
||||
+static struct crypto_alg crypto_xz_alg = {
|
||||
+ .cra_name = "xz",
|
||||
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
|
||||
+ .cra_ctxsize = sizeof(struct xz_comp_ctx),
|
||||
+ .cra_module = THIS_MODULE,
|
||||
+ .cra_list = LIST_HEAD_INIT(crypto_xz_alg.cra_list),
|
||||
+ .cra_init = crypto_xz_init,
|
||||
+ .cra_exit = crypto_xz_exit,
|
||||
+ .cra_u = { .compress = {
|
||||
+ .coa_compress = crypto_xz_compress,
|
||||
+ .coa_decompress = crypto_xz_decompress } }
|
||||
+};
|
||||
+
|
||||
+static int __init crypto_xz_mod_init(void)
|
||||
+{
|
||||
+ return crypto_register_alg(&crypto_xz_alg);
|
||||
+}
|
||||
+
|
||||
+static void __exit crypto_xz_mod_exit(void)
|
||||
+{
|
||||
+ crypto_unregister_alg(&crypto_xz_alg);
|
||||
+}
|
||||
+
|
||||
+module_init(crypto_xz_mod_init);
|
||||
+module_exit(crypto_xz_mod_exit);
|
||||
+
|
||||
+MODULE_LICENSE("GPL v2");
|
||||
+MODULE_DESCRIPTION("Crypto XZ decompression support");
|
||||
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
|
||||
|
|
@ -1,6 +1,6 @@
|
|||
--- a/crypto/Kconfig
|
||||
+++ b/crypto/Kconfig
|
||||
@@ -923,3 +923,6 @@ config CRYPTO_USER_API_SKCIPHER
|
||||
@@ -930,3 +930,6 @@ config CRYPTO_USER_API_SKCIPHER
|
||||
source "drivers/crypto/Kconfig"
|
||||
|
||||
endif # if CRYPTO
|
||||
|
|
@ -9,7 +9,7 @@
|
|||
+
|
||||
--- a/crypto/Makefile
|
||||
+++ b/crypto/Makefile
|
||||
@@ -91,6 +91,8 @@ obj-$(CONFIG_CRYPTO_USER_API) += af_alg.
|
||||
@@ -92,6 +92,8 @@ obj-$(CONFIG_CRYPTO_USER_API) += af_alg.
|
||||
obj-$(CONFIG_CRYPTO_USER_API_HASH) += algif_hash.o
|
||||
obj-$(CONFIG_CRYPTO_USER_API_SKCIPHER) += algif_skcipher.o
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue