From 109568e110ed67d4be1b28609b9fa00fca97f8eb Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Fri, 9 Jan 2009 16:49:30 +1100 Subject: crypto: aes - Move key_length in struct crypto_aes_ctx to be the last field The Intel AES-NI AES acceleration instructions need key_enc, key_dec in struct crypto_aes_ctx to be 16 byte aligned, it make this easier to move key_length to be the last one. Signed-off-by: Huang Ying Signed-off-by: Herbert Xu --- include/crypto/aes.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/crypto/aes.h b/include/crypto/aes.h index 656a4c66a568..7524ba3b6f3c 100644 --- a/include/crypto/aes.h +++ b/include/crypto/aes.h @@ -17,10 +17,14 @@ #define AES_MAX_KEYLENGTH (15 * 16) #define AES_MAX_KEYLENGTH_U32 (AES_MAX_KEYLENGTH / sizeof(u32)) +/* + * Please ensure that the first two fields are 16-byte aligned + * relative to the start of the structure, i.e., don't move them! + */ struct crypto_aes_ctx { - u32 key_length; u32 key_enc[AES_MAX_KEYLENGTH_U32]; u32 key_dec[AES_MAX_KEYLENGTH_U32]; + u32 key_length; }; extern const u32 crypto_ft_tab[4][256]; -- cgit v1.3-7-g2ca7 From 1cac2cbc76b9f3fce0d4ccc374e724e7f2533a47 Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Sun, 18 Jan 2009 16:19:46 +1100 Subject: crypto: cryptd - Add support to access underlying blkcipher cryptd_alloc_ablkcipher() will allocate a cryptd-ed ablkcipher for specified algorithm name. The new allocated one is guaranteed to be cryptd-ed ablkcipher, so the blkcipher underlying can be gotten via cryptd_ablkcipher_child(). Signed-off-by: Huang Ying Signed-off-by: Herbert Xu --- crypto/cryptd.c | 35 +++++++++++++++++++++++++++++++++++ include/crypto/cryptd.h | 27 +++++++++++++++++++++++++++ 2 files changed, 62 insertions(+) create mode 100644 include/crypto/cryptd.h (limited to 'include') diff --git a/crypto/cryptd.c b/crypto/cryptd.c index d29e06b350ff..93b98c525b3a 100644 --- a/crypto/cryptd.c +++ b/crypto/cryptd.c @@ -12,6 +12,7 @@ #include #include +#include #include #include #include @@ -537,6 +538,40 @@ static struct crypto_template cryptd_tmpl = { .module = THIS_MODULE, }; +struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct crypto_ablkcipher *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + tfm = crypto_alloc_ablkcipher(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + if (crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_module != THIS_MODULE) { + crypto_free_ablkcipher(tfm); + return ERR_PTR(-EINVAL); + } + + return __cryptd_ablkcipher_cast(tfm); +} +EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher); + +struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm) +{ + struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); + return ctx->child; +} +EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child); + +void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm) +{ + crypto_free_ablkcipher(&tfm->base); +} +EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); + static inline int cryptd_create_thread(struct cryptd_state *state, int (*fn)(void *data), const char *name) { diff --git a/include/crypto/cryptd.h b/include/crypto/cryptd.h new file mode 100644 index 000000000000..55fa7bbdbc71 --- /dev/null +++ b/include/crypto/cryptd.h @@ -0,0 +1,27 @@ +/* + * Software async crypto daemon + */ + +#ifndef _CRYPTO_CRYPT_H +#define _CRYPTO_CRYPT_H + +#include +#include + +struct cryptd_ablkcipher { + struct crypto_ablkcipher base; +}; + +static inline struct cryptd_ablkcipher *__cryptd_ablkcipher_cast( + struct crypto_ablkcipher *tfm) +{ + return (struct cryptd_ablkcipher *)tfm; +} + +/* alg_name should be algorithm to be cryptd-ed */ +struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, + u32 type, u32 mask); +struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm); +void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm); + +#endif -- cgit v1.3-7-g2ca7 From 9749598633efc2561224954217ff0d70aeed8b50 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 3 Feb 2009 12:47:44 +1100 Subject: crypto: shash - Add crypto_shash_blocksize This function is needed by algorithms that don't know their own block size, e.g., in s390 where the code is common between multiple versions of SHA. Signed-off-by: Herbert Xu --- include/crypto/hash.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include') diff --git a/include/crypto/hash.h b/include/crypto/hash.h index d797e119e3d5..d56bb71617c3 100644 --- a/include/crypto/hash.h +++ b/include/crypto/hash.h @@ -231,6 +231,11 @@ static inline unsigned int crypto_shash_alignmask( return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm)); } +static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm) +{ + return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm)); +} + static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg) { return container_of(alg, struct shash_alg, base); -- cgit v1.3-7-g2ca7 From 3f683d6175748ef9daf4698d9ef5a488dd037063 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Wed, 18 Feb 2009 16:56:59 +0800 Subject: crypto: api - Fix crypto_alloc_tfm/create_create_tfm return convention This is based on a report and patch by Geert Uytterhoeven. The functions crypto_alloc_tfm and create_create_tfm return a pointer that needs to be adjusted by the caller when successful and otherwise an error value. This means that the caller has to check for the error and only perform the adjustment if the pointer returned is valid. Since all callers want to make the adjustment and we know how to adjust it ourselves, it's much easier to just return adjusted pointer directly. The only caveat is that we have to return a void * instead of struct crypto_tfm *. However, this isn't that bad because both of these functions are for internal use only (by types code like shash.c, not even algorithms code). This patch also moves crypto_alloc_tfm into crypto/internal.h (crypto_create_tfm is already there) to reflect this. Signed-off-by: Herbert Xu --- crypto/api.c | 15 +++++++-------- crypto/internal.h | 6 ++++-- crypto/shash.c | 18 +++++------------- include/linux/crypto.h | 3 --- 4 files changed, 16 insertions(+), 26 deletions(-) (limited to 'include') diff --git a/crypto/api.c b/crypto/api.c index 56b6e0e66311..22385cac90bb 100644 --- a/crypto/api.c +++ b/crypto/api.c @@ -453,8 +453,8 @@ err: } EXPORT_SYMBOL_GPL(crypto_alloc_base); -struct crypto_tfm *crypto_create_tfm(struct crypto_alg *alg, - const struct crypto_type *frontend) +void *crypto_create_tfm(struct crypto_alg *alg, + const struct crypto_type *frontend) { char *mem; struct crypto_tfm *tfm = NULL; @@ -488,9 +488,9 @@ out_free_tfm: crypto_shoot_alg(alg); kfree(mem); out_err: - tfm = ERR_PTR(err); + mem = ERR_PTR(err); out: - return tfm; + return mem; } EXPORT_SYMBOL_GPL(crypto_create_tfm); @@ -514,12 +514,11 @@ EXPORT_SYMBOL_GPL(crypto_create_tfm); * * In case of error the return value is an error pointer. */ -struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, - const struct crypto_type *frontend, - u32 type, u32 mask) +void *crypto_alloc_tfm(const char *alg_name, + const struct crypto_type *frontend, u32 type, u32 mask) { struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask); - struct crypto_tfm *tfm; + void *tfm; int err; type &= frontend->maskclear; diff --git a/crypto/internal.h b/crypto/internal.h index 3c19a27a7563..fc76e1f37fc3 100644 --- a/crypto/internal.h +++ b/crypto/internal.h @@ -109,8 +109,10 @@ void crypto_alg_tested(const char *name, int err); void crypto_shoot_alg(struct crypto_alg *alg); struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, u32 mask); -struct crypto_tfm *crypto_create_tfm(struct crypto_alg *alg, - const struct crypto_type *frontend); +void *crypto_create_tfm(struct crypto_alg *alg, + const struct crypto_type *frontend); +void *crypto_alloc_tfm(const char *alg_name, + const struct crypto_type *frontend, u32 type, u32 mask); int crypto_register_instance(struct crypto_template *tmpl, struct crypto_instance *inst); diff --git a/crypto/shash.c b/crypto/shash.c index 13a0dc150a4d..7a659733f94a 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -18,15 +18,10 @@ #include #include -static const struct crypto_type crypto_shash_type; - -static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) -{ - return container_of(tfm, struct crypto_shash, base); -} - #include "internal.h" +static const struct crypto_type crypto_shash_type; + static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, unsigned int keylen) { @@ -282,8 +277,7 @@ static int crypto_init_shash_ops_async(struct crypto_tfm *tfm) if (!crypto_mod_get(calg)) return -EAGAIN; - shash = __crypto_shash_cast(crypto_create_tfm( - calg, &crypto_shash_type)); + shash = crypto_create_tfm(calg, &crypto_shash_type); if (IS_ERR(shash)) { crypto_mod_put(calg); return PTR_ERR(shash); @@ -391,8 +385,7 @@ static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) if (!crypto_mod_get(calg)) return -EAGAIN; - shash = __crypto_shash_cast(crypto_create_tfm( - calg, &crypto_shash_type)); + shash = crypto_create_tfm(calg, &crypto_shash_type); if (IS_ERR(shash)) { crypto_mod_put(calg); return PTR_ERR(shash); @@ -480,8 +473,7 @@ static const struct crypto_type crypto_shash_type = { struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, u32 mask) { - return __crypto_shash_cast( - crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask)); + return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); } EXPORT_SYMBOL_GPL(crypto_alloc_shash); diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 1f2e9020acc6..29729b834380 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -548,9 +548,6 @@ struct crypto_attr_u32 { * Transform user interface. */ -struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, - const struct crypto_type *frontend, - u32 type, u32 mask); struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask); void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm); -- cgit v1.3-7-g2ca7 From 25c38d3fb92fc23af7730a1601bc20af8216ae44 Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Thu, 19 Feb 2009 14:33:40 +0800 Subject: crypto: api - Use dedicated workqueue for crypto subsystem Use dedicated workqueue for crypto subsystem A dedicated workqueue named kcrypto_wq is created to be used by crypto subsystem. The system shared keventd_wq is not suitable for encryption/decryption, because of potential starvation problem. Signed-off-by: Huang Ying Signed-off-by: Herbert Xu --- crypto/Kconfig | 3 +++ crypto/Makefile | 2 ++ crypto/crypto_wq.c | 38 ++++++++++++++++++++++++++++++++++++++ include/crypto/crypto_wq.h | 7 +++++++ 4 files changed, 50 insertions(+) create mode 100644 crypto/crypto_wq.c create mode 100644 include/crypto/crypto_wq.h (limited to 'include') diff --git a/crypto/Kconfig b/crypto/Kconfig index a83ce0462b6b..420b630a17cf 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -106,6 +106,9 @@ config CRYPTO_NULL help These are 'Null' algorithms, used by IPsec, which do nothing. +config CRYPTO_WORKQUEUE + tristate + config CRYPTO_CRYPTD tristate "Software async crypto daemon" select CRYPTO_BLKCIPHER diff --git a/crypto/Makefile b/crypto/Makefile index 46b08bf2035f..e05a844e08d5 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -5,6 +5,8 @@ obj-$(CONFIG_CRYPTO) += crypto.o crypto-objs := api.o cipher.o digest.o compress.o +obj-$(CONFIG_CRYPTO_WORKQUEUE) += crypto_wq.o + obj-$(CONFIG_CRYPTO_FIPS) += fips.o crypto_algapi-$(CONFIG_PROC_FS) += proc.o diff --git a/crypto/crypto_wq.c b/crypto/crypto_wq.c new file mode 100644 index 000000000000..fdcf6248f152 --- /dev/null +++ b/crypto/crypto_wq.c @@ -0,0 +1,38 @@ +/* + * Workqueue for crypto subsystem + * + * Copyright (c) 2009 Intel Corp. + * Author: Huang Ying + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#include +#include +#include + +struct workqueue_struct *kcrypto_wq; +EXPORT_SYMBOL_GPL(kcrypto_wq); + +static int __init crypto_wq_init(void) +{ + kcrypto_wq = create_workqueue("crypto"); + if (unlikely(!kcrypto_wq)) + return -ENOMEM; + return 0; +} + +static void __exit crypto_wq_exit(void) +{ + destroy_workqueue(kcrypto_wq); +} + +module_init(crypto_wq_init); +module_exit(crypto_wq_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Workqueue for crypto subsystem"); diff --git a/include/crypto/crypto_wq.h b/include/crypto/crypto_wq.h new file mode 100644 index 000000000000..a7d252daf91b --- /dev/null +++ b/include/crypto/crypto_wq.h @@ -0,0 +1,7 @@ +#ifndef CRYPTO_WQ_H +#define CRYPTO_WQ_H + +#include + +extern struct workqueue_struct *kcrypto_wq; +#endif -- cgit v1.3-7-g2ca7 From 9c3c133b1ed6e6d01bfabb6de29bf3d0f0886354 Mon Sep 17 00:00:00 2001 From: Alexander Clouter Date: Sun, 22 Feb 2009 12:03:56 +0800 Subject: hwrng: timeriomem - New driver Some hardware platforms, the TS-7800[1] is one for example, can supply the kernel with an entropy source, albeit a slow one for TS-7800 users, by just reading a particular IO address. This source must not be read above a certain rate otherwise the quality suffers. The driver is then hooked into by calling platform_device_(register|add|del) passing a structure similar to: ------ static struct timeriomem_rng_data ts78xx_ts_rng_data = { .address = (u32 *__iomem) TS_RNG, .period = 1000000, /* one second */ }; static struct platform_device ts78xx_ts_rng_device = { .name = "timeriomem_rng", .id = -1, .dev = { .platform_data = &ts78xx_ts_rng_data, }, .num_resources = 0, }; ------ [1] http://www.embeddedarm.com/products/board-detail.php?product=TS-7800 Signed-off-by: Alexander Clouter Signed-off-by: Herbert Xu --- drivers/char/hw_random/Kconfig | 14 +++ drivers/char/hw_random/Makefile | 1 + drivers/char/hw_random/timeriomem-rng.c | 151 ++++++++++++++++++++++++++++++++ include/linux/timeriomem-rng.h | 21 +++++ 4 files changed, 187 insertions(+) create mode 100644 drivers/char/hw_random/timeriomem-rng.c create mode 100644 include/linux/timeriomem-rng.h (limited to 'include') diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 8822eca58ffa..e86dd425a70f 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -20,6 +20,20 @@ config HW_RANDOM If unsure, say Y. +config HW_RANDOM_TIMERIOMEM + tristate "Timer IOMEM HW Random Number Generator support" + depends on HW_RANDOM + ---help--- + This driver provides kernel-side support for a generic Random + Number Generator used by reading a 'dumb' iomem address that + is to be read no faster than, for example, once a second; + the default FPGA bitstream on the TS-7800 has such functionality. + + To compile this driver as a module, choose M here: the + module will be called timeriomem-rng. + + If unsure, say Y. + config HW_RANDOM_INTEL tristate "Intel HW Random Number Generator support" depends on HW_RANDOM && (X86 || IA64) && PCI diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile index b6effb7522c2..e81d21a5f28f 100644 --- a/drivers/char/hw_random/Makefile +++ b/drivers/char/hw_random/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_HW_RANDOM) += rng-core.o rng-core-y := core.o +obj-$(CONFIG_HW_RANDOM_TIMERIOMEM) += timeriomem-rng.o obj-$(CONFIG_HW_RANDOM_INTEL) += intel-rng.o obj-$(CONFIG_HW_RANDOM_AMD) += amd-rng.o obj-$(CONFIG_HW_RANDOM_GEODE) += geode-rng.o diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c new file mode 100644 index 000000000000..10ad41be5897 --- /dev/null +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -0,0 +1,151 @@ +/* + * drivers/char/hw_random/timeriomem-rng.c + * + * Copyright (C) 2009 Alexander Clouter + * + * Derived from drivers/char/hw_random/omap-rng.c + * Copyright 2005 (c) MontaVista Software, Inc. + * Author: Deepak Saxena + * + * 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. + * + * Overview: + * This driver is useful for platforms that have an IO range that provides + * periodic random data from a single IO memory address. All the platform + * has to do is provide the address and 'wait time' that new data becomes + * available. + * + * TODO: add support for reading sizes other than 32bits and masking + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct timeriomem_rng_data *timeriomem_rng_data; + +static void timeriomem_rng_trigger(unsigned long); +static DEFINE_TIMER(timeriomem_rng_timer, timeriomem_rng_trigger, 0, 0); + +/* + * have data return 1, however return 0 if we have nothing + */ +static int timeriomem_rng_data_present(struct hwrng *rng, int wait) +{ + if (rng->priv == 0) + return 1; + + if (!wait || timeriomem_rng_data->present) + return timeriomem_rng_data->present; + + wait_for_completion(&timeriomem_rng_data->completion); + + return 1; +} + +static int timeriomem_rng_data_read(struct hwrng *rng, u32 *data) +{ + unsigned long cur; + s32 delay; + + *data = readl(timeriomem_rng_data->address); + + if (rng->priv != 0) { + cur = jiffies; + + delay = cur - timeriomem_rng_timer.expires; + delay = rng->priv - (delay % rng->priv); + + timeriomem_rng_timer.expires = cur + delay; + timeriomem_rng_data->present = 0; + + init_completion(&timeriomem_rng_data->completion); + add_timer(&timeriomem_rng_timer); + } + + return 4; +} + +static void timeriomem_rng_trigger(unsigned long dummy) +{ + timeriomem_rng_data->present = 1; + complete(&timeriomem_rng_data->completion); +} + +static struct hwrng timeriomem_rng_ops = { + .name = "timeriomem", + .data_present = timeriomem_rng_data_present, + .data_read = timeriomem_rng_data_read, + .priv = 0, +}; + +static int __init timeriomem_rng_probe(struct platform_device *pdev) +{ + int ret; + + timeriomem_rng_data = pdev->dev.platform_data; + + if (timeriomem_rng_data->period != 0 + && usecs_to_jiffies(timeriomem_rng_data->period) > 0) { + timeriomem_rng_timer.expires = jiffies; + + timeriomem_rng_ops.priv = usecs_to_jiffies( + timeriomem_rng_data->period); + } + timeriomem_rng_data->present = 1; + + ret = hwrng_register(&timeriomem_rng_ops); + if (ret) { + dev_err(&pdev->dev, "problem registering\n"); + return ret; + } + + dev_info(&pdev->dev, "32bits from 0x%p @ %dus\n", + timeriomem_rng_data->address, + timeriomem_rng_data->period); + + return 0; +} + +static int __devexit timeriomem_rng_remove(struct platform_device *pdev) +{ + del_timer_sync(&timeriomem_rng_timer); + hwrng_unregister(&timeriomem_rng_ops); + + return 0; +} + +static struct platform_driver timeriomem_rng_driver = { + .driver = { + .name = "timeriomem_rng", + .owner = THIS_MODULE, + }, + .probe = timeriomem_rng_probe, + .remove = __devexit_p(timeriomem_rng_remove), +}; + +static int __init timeriomem_rng_init(void) +{ + return platform_driver_register(&timeriomem_rng_driver); +} + +static void __exit timeriomem_rng_exit(void) +{ + platform_driver_unregister(&timeriomem_rng_driver); +} + +module_init(timeriomem_rng_init); +module_exit(timeriomem_rng_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Alexander Clouter "); +MODULE_DESCRIPTION("Timer IOMEM H/W RNG driver"); diff --git a/include/linux/timeriomem-rng.h b/include/linux/timeriomem-rng.h new file mode 100644 index 000000000000..dd253177f65f --- /dev/null +++ b/include/linux/timeriomem-rng.h @@ -0,0 +1,21 @@ +/* + * linux/include/linux/timeriomem-rng.h + * + * Copyright (c) 2009 Alexander Clouter + * + * 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 + +struct timeriomem_rng_data { + struct completion completion; + unsigned int present:1; + + u32 __iomem *address; + + /* measures in usecs */ + unsigned int period; +}; -- cgit v1.3-7-g2ca7 From a1d2f09544065b60598b8167d94a6371bff3e892 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 4 Mar 2009 15:05:33 +0800 Subject: crypto: compress - Add pcomp interface The current "comp" crypto interface supports one-shot (de)compression only, i.e. the whole data buffer to be (de)compressed must be passed at once, and the whole (de)compressed data buffer will be received at once. In several use-cases (e.g. compressed file systems that store files in big compressed blocks), this workflow is not suitable. Furthermore, the "comp" type doesn't provide for the configuration of (de)compression parameters, and always allocates workspace memory for both compression and decompression, which may waste memory. To solve this, add a "pcomp" partial (de)compression interface that provides the following operations: - crypto_compress_{init,update,final}() for compression, - crypto_decompress_{init,update,final}() for decompression, - crypto_{,de}compress_setup(), to configure (de)compression parameters (incl. allocating workspace memory). The (de)compression methods take a struct comp_request, which was mimicked after the z_stream object in zlib, and contains buffer pointer and length pairs for input and output. The setup methods take an opaque parameter pointer and length pair. Parameters are supposed to be encoded using netlink attributes, whose meanings depend on the actual (name of the) (de)compression algorithm. Signed-off-by: Geert Uytterhoeven Signed-off-by: Herbert Xu --- crypto/Kconfig | 4 ++ crypto/Makefile | 2 + crypto/pcompress.c | 97 ++++++++++++++++++++++++++++ include/crypto/compress.h | 125 +++++++++++++++++++++++++++++++++++++ include/crypto/internal/compress.h | 28 +++++++++ include/linux/crypto.h | 1 + 6 files changed, 257 insertions(+) create mode 100644 crypto/pcompress.c create mode 100644 include/crypto/compress.h create mode 100644 include/crypto/internal/compress.h (limited to 'include') diff --git a/crypto/Kconfig b/crypto/Kconfig index 4a3e6b225189..1676f171c54b 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -76,6 +76,10 @@ config CRYPTO_RNG2 tristate select CRYPTO_ALGAPI2 +config CRYPTO_PCOMP + tristate + select CRYPTO_ALGAPI2 + config CRYPTO_MANAGER tristate "Cryptographic algorithm manager" select CRYPTO_MANAGER2 diff --git a/crypto/Makefile b/crypto/Makefile index e05a844e08d5..1132a678b253 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -27,6 +27,8 @@ crypto_hash-objs += ahash.o crypto_hash-objs += shash.o obj-$(CONFIG_CRYPTO_HASH2) += crypto_hash.o +obj-$(CONFIG_CRYPTO_PCOMP) += pcompress.o + cryptomgr-objs := algboss.o testmgr.o obj-$(CONFIG_CRYPTO_MANAGER2) += cryptomgr.o diff --git a/crypto/pcompress.c b/crypto/pcompress.c new file mode 100644 index 000000000000..ca9a4af91efe --- /dev/null +++ b/crypto/pcompress.c @@ -0,0 +1,97 @@ +/* + * Cryptographic API. + * + * Partial (de)compression operations. + * + * Copyright 2008 Sony Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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, see . + */ + +#include +#include +#include +#include +#include + +#include + +#include "internal.h" + + +static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask) +{ + return 0; +} + +static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg, + const struct crypto_type *frontend) +{ + return alg->cra_ctxsize; +} + +static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm, + const struct crypto_type *frontend) +{ + return 0; +} + +static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) + __attribute__ ((unused)); +static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) +{ + seq_printf(m, "type : pcomp\n"); +} + +static const struct crypto_type crypto_pcomp_type = { + .extsize = crypto_pcomp_extsize, + .init = crypto_pcomp_init, + .init_tfm = crypto_pcomp_init_tfm, +#ifdef CONFIG_PROC_FS + .show = crypto_pcomp_show, +#endif + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_PCOMPRESS, + .tfmsize = offsetof(struct crypto_pcomp, base), +}; + +struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, + u32 mask) +{ + return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_alloc_pcomp); + +int crypto_register_pcomp(struct pcomp_alg *alg) +{ + struct crypto_alg *base = &alg->base; + + base->cra_type = &crypto_pcomp_type; + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS; + + return crypto_register_alg(base); +} +EXPORT_SYMBOL_GPL(crypto_register_pcomp); + +int crypto_unregister_pcomp(struct pcomp_alg *alg) +{ + return crypto_unregister_alg(&alg->base); +} +EXPORT_SYMBOL_GPL(crypto_unregister_pcomp); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Partial (de)compression type"); +MODULE_AUTHOR("Sony Corporation"); diff --git a/include/crypto/compress.h b/include/crypto/compress.h new file mode 100644 index 000000000000..b7d228708d6b --- /dev/null +++ b/include/crypto/compress.h @@ -0,0 +1,125 @@ +/* + * Compress: Compression algorithms under the cryptographic API. + * + * Copyright 2008 Sony Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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, see . + */ + +#ifndef _CRYPTO_COMPRESS_H +#define _CRYPTO_COMPRESS_H + +#include + + +struct comp_request { + const void *next_in; /* next input byte */ + void *next_out; /* next output byte */ + unsigned int avail_in; /* bytes available at next_in */ + unsigned int avail_out; /* bytes available at next_out */ +}; + +struct crypto_pcomp { + struct crypto_tfm base; +}; + +struct pcomp_alg { + int (*compress_setup)(struct crypto_pcomp *tfm, void *params, + unsigned int len); + int (*compress_init)(struct crypto_pcomp *tfm); + int (*compress_update)(struct crypto_pcomp *tfm, + struct comp_request *req); + int (*compress_final)(struct crypto_pcomp *tfm, + struct comp_request *req); + int (*decompress_setup)(struct crypto_pcomp *tfm, void *params, + unsigned int len); + int (*decompress_init)(struct crypto_pcomp *tfm); + int (*decompress_update)(struct crypto_pcomp *tfm, + struct comp_request *req); + int (*decompress_final)(struct crypto_pcomp *tfm, + struct comp_request *req); + + struct crypto_alg base; +}; + +extern struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, + u32 mask); + +static inline struct crypto_tfm *crypto_pcomp_tfm(struct crypto_pcomp *tfm) +{ + return &tfm->base; +} + +static inline void crypto_free_pcomp(struct crypto_pcomp *tfm) +{ + crypto_destroy_tfm(tfm, crypto_pcomp_tfm(tfm)); +} + +static inline struct pcomp_alg *__crypto_pcomp_alg(struct crypto_alg *alg) +{ + return container_of(alg, struct pcomp_alg, base); +} + +static inline struct pcomp_alg *crypto_pcomp_alg(struct crypto_pcomp *tfm) +{ + return __crypto_pcomp_alg(crypto_pcomp_tfm(tfm)->__crt_alg); +} + +static inline int crypto_compress_setup(struct crypto_pcomp *tfm, + void *params, unsigned int len) +{ + return crypto_pcomp_alg(tfm)->compress_setup(tfm, params, len); +} + +static inline int crypto_compress_init(struct crypto_pcomp *tfm) +{ + return crypto_pcomp_alg(tfm)->compress_init(tfm); +} + +static inline int crypto_compress_update(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + return crypto_pcomp_alg(tfm)->compress_update(tfm, req); +} + +static inline int crypto_compress_final(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + return crypto_pcomp_alg(tfm)->compress_final(tfm, req); +} + +static inline int crypto_decompress_setup(struct crypto_pcomp *tfm, + void *params, unsigned int len) +{ + return crypto_pcomp_alg(tfm)->decompress_setup(tfm, params, len); +} + +static inline int crypto_decompress_init(struct crypto_pcomp *tfm) +{ + return crypto_pcomp_alg(tfm)->decompress_init(tfm); +} + +static inline int crypto_decompress_update(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + return crypto_pcomp_alg(tfm)->decompress_update(tfm, req); +} + +static inline int crypto_decompress_final(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + return crypto_pcomp_alg(tfm)->decompress_final(tfm, req); +} + +#endif /* _CRYPTO_COMPRESS_H */ diff --git a/include/crypto/internal/compress.h b/include/crypto/internal/compress.h new file mode 100644 index 000000000000..178a888d1d93 --- /dev/null +++ b/include/crypto/internal/compress.h @@ -0,0 +1,28 @@ +/* + * Compress: Compression algorithms under the cryptographic API. + * + * Copyright 2008 Sony Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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, see . + */ + +#ifndef _CRYPTO_INTERNAL_COMPRESS_H +#define _CRYPTO_INTERNAL_COMPRESS_H + +#include + +extern int crypto_register_pcomp(struct pcomp_alg *alg); +extern int crypto_unregister_pcomp(struct pcomp_alg *alg); + +#endif /* _CRYPTO_INTERNAL_COMPRESS_H */ diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 29729b834380..ec29fa268b94 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -40,6 +40,7 @@ #define CRYPTO_ALG_TYPE_SHASH 0x00000009 #define CRYPTO_ALG_TYPE_AHASH 0x0000000a #define CRYPTO_ALG_TYPE_RNG 0x0000000c +#define CRYPTO_ALG_TYPE_PCOMPRESS 0x0000000f #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000c -- cgit v1.3-7-g2ca7 From bf68e65ec9ea61e32ab71bef59aa5d24d255241f Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 4 Mar 2009 15:15:49 +0800 Subject: crypto: zlib - New zlib crypto module, using pcomp Signed-off-by: Geert Uytterhoeven Cc: James Morris Signed-off-by: Herbert Xu --- crypto/Kconfig | 9 ++ crypto/Makefile | 1 + crypto/zlib.c | 378 ++++++++++++++++++++++++++++++++++++++++++++++ include/crypto/compress.h | 20 +++ 4 files changed, 408 insertions(+) create mode 100644 crypto/zlib.c (limited to 'include') diff --git a/crypto/Kconfig b/crypto/Kconfig index 1676f171c54b..be5d3128f8a8 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -748,6 +748,15 @@ config CRYPTO_DEFLATE You will most probably want this if using IPSec. +config CRYPTO_ZLIB + tristate "Zlib compression algorithm" + select CRYPTO_PCOMP + select ZLIB_INFLATE + select ZLIB_DEFLATE + select NLATTR + help + This is the zlib algorithm. + config CRYPTO_LZO tristate "LZO compression algorithm" select CRYPTO_ALGAPI diff --git a/crypto/Makefile b/crypto/Makefile index 1132a678b253..673d9f7c1bda 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -74,6 +74,7 @@ obj-$(CONFIG_CRYPTO_ANUBIS) += anubis.o obj-$(CONFIG_CRYPTO_SEED) += seed.o obj-$(CONFIG_CRYPTO_SALSA20) += salsa20_generic.o obj-$(CONFIG_CRYPTO_DEFLATE) += deflate.o +obj-$(CONFIG_CRYPTO_ZLIB) += zlib.o obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o diff --git a/crypto/zlib.c b/crypto/zlib.c new file mode 100644 index 000000000000..33609bab614e --- /dev/null +++ b/crypto/zlib.c @@ -0,0 +1,378 @@ +/* + * Cryptographic API. + * + * Zlib algorithm + * + * Copyright 2008 Sony Corporation + * + * Based on deflate.c, which is + * Copyright (c) 2003 James Morris + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * FIXME: deflate transforms will require up to a total of about 436k of kernel + * memory on i386 (390k for compression, the rest for decompression), as the + * current zlib kernel code uses a worst case pre-allocation system by default. + * This needs to be fixed so that the amount of memory required is properly + * related to the winbits and memlevel parameters. + */ + +#define pr_fmt(fmt) "%s: " fmt, __func__ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include + + +struct zlib_ctx { + struct z_stream_s comp_stream; + struct z_stream_s decomp_stream; + int decomp_windowBits; +}; + + +static void zlib_comp_exit(struct zlib_ctx *ctx) +{ + struct z_stream_s *stream = &ctx->comp_stream; + + if (stream->workspace) { + zlib_deflateEnd(stream); + vfree(stream->workspace); + stream->workspace = NULL; + } +} + +static void zlib_decomp_exit(struct zlib_ctx *ctx) +{ + struct z_stream_s *stream = &ctx->decomp_stream; + + if (stream->workspace) { + zlib_inflateEnd(stream); + kfree(stream->workspace); + stream->workspace = NULL; + } +} + +static int zlib_init(struct crypto_tfm *tfm) +{ + return 0; +} + +static void zlib_exit(struct crypto_tfm *tfm) +{ + struct zlib_ctx *ctx = crypto_tfm_ctx(tfm); + + zlib_comp_exit(ctx); + zlib_decomp_exit(ctx); +} + + +static int zlib_compress_setup(struct crypto_pcomp *tfm, void *params, + unsigned int len) +{ + struct zlib_ctx *ctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &ctx->comp_stream; + struct nlattr *tb[ZLIB_COMP_MAX + 1]; + size_t workspacesize; + int ret; + + ret = nla_parse(tb, ZLIB_COMP_MAX, params, len, NULL); + if (ret) + return ret; + + zlib_comp_exit(ctx); + + workspacesize = zlib_deflate_workspacesize(); + stream->workspace = vmalloc(workspacesize); + if (!stream->workspace) + return -ENOMEM; + + memset(stream->workspace, 0, workspacesize); + ret = zlib_deflateInit2(stream, + tb[ZLIB_COMP_LEVEL] + ? nla_get_u32(tb[ZLIB_COMP_LEVEL]) + : Z_DEFAULT_COMPRESSION, + tb[ZLIB_COMP_METHOD] + ? nla_get_u32(tb[ZLIB_COMP_METHOD]) + : Z_DEFLATED, + tb[ZLIB_COMP_WINDOWBITS] + ? nla_get_u32(tb[ZLIB_COMP_WINDOWBITS]) + : MAX_WBITS, + tb[ZLIB_COMP_MEMLEVEL] + ? nla_get_u32(tb[ZLIB_COMP_MEMLEVEL]) + : DEF_MEM_LEVEL, + tb[ZLIB_COMP_STRATEGY] + ? nla_get_u32(tb[ZLIB_COMP_STRATEGY]) + : Z_DEFAULT_STRATEGY); + if (ret != Z_OK) { + vfree(stream->workspace); + stream->workspace = NULL; + return -EINVAL; + } + + return 0; +} + +static int zlib_compress_init(struct crypto_pcomp *tfm) +{ + int ret; + struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &dctx->comp_stream; + + ret = zlib_deflateReset(stream); + if (ret != Z_OK) + return -EINVAL; + + return 0; +} + +static int zlib_compress_update(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + int ret; + struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &dctx->comp_stream; + + pr_debug("avail_in %u, avail_out %u\n", req->avail_in, req->avail_out); + stream->next_in = req->next_in; + stream->avail_in = req->avail_in; + stream->next_out = req->next_out; + stream->avail_out = req->avail_out; + + ret = zlib_deflate(stream, Z_NO_FLUSH); + switch (ret) { + case Z_OK: + break; + + case Z_BUF_ERROR: + pr_debug("zlib_deflate could not make progress\n"); + return -EAGAIN; + + default: + pr_debug("zlib_deflate failed %d\n", ret); + return -EINVAL; + } + + pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n", + stream->avail_in, stream->avail_out, + req->avail_in - stream->avail_in, + req->avail_out - stream->avail_out); + req->next_in = stream->next_in; + req->avail_in = stream->avail_in; + req->next_out = stream->next_out; + req->avail_out = stream->avail_out; + return 0; +} + +static int zlib_compress_final(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + int ret; + struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &dctx->comp_stream; + + pr_debug("avail_in %u, avail_out %u\n", req->avail_in, req->avail_out); + stream->next_in = req->next_in; + stream->avail_in = req->avail_in; + stream->next_out = req->next_out; + stream->avail_out = req->avail_out; + + ret = zlib_deflate(stream, Z_FINISH); + if (ret != Z_STREAM_END) { + pr_debug("zlib_deflate failed %d\n", ret); + return -EINVAL; + } + + pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n", + stream->avail_in, stream->avail_out, + req->avail_in - stream->avail_in, + req->avail_out - stream->avail_out); + req->next_in = stream->next_in; + req->avail_in = stream->avail_in; + req->next_out = stream->next_out; + req->avail_out = stream->avail_out; + return 0; +} + + +static int zlib_decompress_setup(struct crypto_pcomp *tfm, void *params, + unsigned int len) +{ + struct zlib_ctx *ctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &ctx->decomp_stream; + struct nlattr *tb[ZLIB_DECOMP_MAX + 1]; + int ret = 0; + + ret = nla_parse(tb, ZLIB_DECOMP_MAX, params, len, NULL); + if (ret) + return ret; + + zlib_decomp_exit(ctx); + + ctx->decomp_windowBits = tb[ZLIB_DECOMP_WINDOWBITS] + ? nla_get_u32(tb[ZLIB_DECOMP_WINDOWBITS]) + : DEF_WBITS; + + stream->workspace = kzalloc(zlib_inflate_workspacesize(), GFP_KERNEL); + if (!stream->workspace) + return -ENOMEM; + + ret = zlib_inflateInit2(stream, ctx->decomp_windowBits); + if (ret != Z_OK) { + kfree(stream->workspace); + stream->workspace = NULL; + return -EINVAL; + } + + return 0; +} + +static int zlib_decompress_init(struct crypto_pcomp *tfm) +{ + int ret; + struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &dctx->decomp_stream; + + ret = zlib_inflateReset(stream); + if (ret != Z_OK) + return -EINVAL; + + return 0; +} + +static int zlib_decompress_update(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + int ret; + struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &dctx->decomp_stream; + + pr_debug("avail_in %u, avail_out %u\n", req->avail_in, req->avail_out); + stream->next_in = req->next_in; + stream->avail_in = req->avail_in; + stream->next_out = req->next_out; + stream->avail_out = req->avail_out; + + ret = zlib_inflate(stream, Z_SYNC_FLUSH); + switch (ret) { + case Z_OK: + case Z_STREAM_END: + break; + + case Z_BUF_ERROR: + pr_debug("zlib_inflate could not make progress\n"); + return -EAGAIN; + + default: + pr_debug("zlib_inflate failed %d\n", ret); + return -EINVAL; + } + + pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n", + stream->avail_in, stream->avail_out, + req->avail_in - stream->avail_in, + req->avail_out - stream->avail_out); + req->next_in = stream->next_in; + req->avail_in = stream->avail_in; + req->next_out = stream->next_out; + req->avail_out = stream->avail_out; + return 0; +} + +static int zlib_decompress_final(struct crypto_pcomp *tfm, + struct comp_request *req) +{ + int ret; + struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm)); + struct z_stream_s *stream = &dctx->decomp_stream; + + pr_debug("avail_in %u, avail_out %u\n", req->avail_in, req->avail_out); + stream->next_in = req->next_in; + stream->avail_in = req->avail_in; + stream->next_out = req->next_out; + stream->avail_out = req->avail_out; + + if (dctx->decomp_windowBits < 0) { + ret = zlib_inflate(stream, Z_SYNC_FLUSH); + /* + * Work around a bug in zlib, which sometimes wants to taste an + * extra byte when being used in the (undocumented) raw deflate + * mode. (From USAGI). + */ + if (ret == Z_OK && !stream->avail_in && stream->avail_out) { + const void *saved_next_in = stream->next_in; + u8 zerostuff = 0; + + stream->next_in = &zerostuff; + stream->avail_in = 1; + ret = zlib_inflate(stream, Z_FINISH); + stream->next_in = saved_next_in; + stream->avail_in = 0; + } + } else + ret = zlib_inflate(stream, Z_FINISH); + if (ret != Z_STREAM_END) { + pr_debug("zlib_inflate failed %d\n", ret); + return -EINVAL; + } + + pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n", + stream->avail_in, stream->avail_out, + req->avail_in - stream->avail_in, + req->avail_out - stream->avail_out); + req->next_in = stream->next_in; + req->avail_in = stream->avail_in; + req->next_out = stream->next_out; + req->avail_out = stream->avail_out; + return 0; +} + + +static struct pcomp_alg zlib_alg = { + .compress_setup = zlib_compress_setup, + .compress_init = zlib_compress_init, + .compress_update = zlib_compress_update, + .compress_final = zlib_compress_final, + .decompress_setup = zlib_decompress_setup, + .decompress_init = zlib_decompress_init, + .decompress_update = zlib_decompress_update, + .decompress_final = zlib_decompress_final, + + .base = { + .cra_name = "zlib", + .cra_flags = CRYPTO_ALG_TYPE_PCOMPRESS, + .cra_ctxsize = sizeof(struct zlib_ctx), + .cra_module = THIS_MODULE, + .cra_init = zlib_init, + .cra_exit = zlib_exit, + } +}; + +static int __init zlib_mod_init(void) +{ + return crypto_register_pcomp(&zlib_alg); +} + +static void __exit zlib_mod_fini(void) +{ + crypto_unregister_pcomp(&zlib_alg); +} + +module_init(zlib_mod_init); +module_exit(zlib_mod_fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Zlib Compression Algorithm"); +MODULE_AUTHOR("Sony Corporation"); diff --git a/include/crypto/compress.h b/include/crypto/compress.h index b7d228708d6b..86163ef24219 100644 --- a/include/crypto/compress.h +++ b/include/crypto/compress.h @@ -30,6 +30,26 @@ struct comp_request { unsigned int avail_out; /* bytes available at next_out */ }; +enum zlib_comp_params { + ZLIB_COMP_LEVEL = 1, /* e.g. Z_DEFAULT_COMPRESSION */ + ZLIB_COMP_METHOD, /* e.g. Z_DEFLATED */ + ZLIB_COMP_WINDOWBITS, /* e.g. MAX_WBITS */ + ZLIB_COMP_MEMLEVEL, /* e.g. DEF_MEM_LEVEL */ + ZLIB_COMP_STRATEGY, /* e.g. Z_DEFAULT_STRATEGY */ + __ZLIB_COMP_MAX, +}; + +#define ZLIB_COMP_MAX (__ZLIB_COMP_MAX - 1) + + +enum zlib_decomp_params { + ZLIB_DECOMP_WINDOWBITS = 1, /* e.g. DEF_WBITS */ + __ZLIB_DECOMP_MAX, +}; + +#define ZLIB_DECOMP_MAX (__ZLIB_DECOMP_MAX - 1) + + struct crypto_pcomp { struct crypto_tfm base; }; -- cgit v1.3-7-g2ca7