openwrt/upstream - upstream openwrt

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author	Gabor Juhos <juhosg@openwrt.org>	2012-04-29 07:36:36 +0000
committer	Gabor Juhos <juhosg@openwrt.org>	2012-04-29 07:36:36 +0000
commit	5f4e66bbef099288879d478cbe21ebb6afa571fd (patch)
tree	27156fea02f3fe28df74b14cee35e3198eb16808 /package/kernel/modules/netdevices.mk
parent	566114524e374888ffc34925c2ea9a8d1ff1c075 (diff)
download	upstream-5f4e66bbef099288879d478cbe21ebb6afa571fd.tar.gz upstream-5f4e66bbef099288879d478cbe21ebb6afa571fd.tar.bz2 upstream-5f4e66bbef099288879d478cbe21ebb6afa571fd.zip

adm5120: switch to 3.3.3

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31509 3c298f89-4303-0410-b956-a3cf2f4a3e73

Diffstat (limited to 'package/kernel/modules/netdevices.mk')

0 files changed, 0 insertions, 0 deletions

--- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1446,6 +1446,13 @@ config CRYPTO_LZ4HC help This is the LZ4 high compression mode 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 @@ -89,6 +89,7 @@ obj-$(CONFIG_CRYPTO_AUTHENC) += authenc. obj-$(CONFIG_CRYPTO_LZO) += lzo.o obj-$(CONFIG_CRYPTO_LZ4) += lz4.o obj-$(CONFIG_CRYPTO_LZ4HC) += lz4hc.o +obj-$(CONFIG_CRYPTO_XZ) += xz.o obj-$(CONFIG_CRYPTO_842) += 842.o obj-$(CONFIG_CRYPTO_RNG2) += rng.o obj-$(CONFIG_CRYPTO_RNG2) += krng.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>");


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