crypto: acomp - add asynchronous compression api (2ebda74f) · Commits · e / devices / android_kernel_oneplus_sm8150

crypto/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -102,6 +102,15 @@ config CRYPTO_KPP
		select CRYPTO_ALGAPI
		select CRYPTO_KPP2

		config CRYPTO_ACOMP2
		tristate
		select CRYPTO_ALGAPI2

		config CRYPTO_ACOMP
		tristate
		select CRYPTO_ALGAPI
		select CRYPTO_ACOMP2

		config CRYPTO_RSA
		tristate "RSA algorithm"
		select CRYPTO_AKCIPHER
		@@ -138,6 +147,7 @@ config CRYPTO_MANAGER2
		select CRYPTO_BLKCIPHER2
		select CRYPTO_AKCIPHER2
		select CRYPTO_KPP2
		select CRYPTO_ACOMP2

		config CRYPTO_USER
		tristate "Userspace cryptographic algorithm configuration"

crypto/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,8 @@ rsa_generic-y += rsa_helper.o
		rsa_generic-y += rsa-pkcs1pad.o
		obj-$(CONFIG_CRYPTO_RSA) += rsa_generic.o

		obj-$(CONFIG_CRYPTO_ACOMP2) += acompress.o

		cryptomgr-y := algboss.o testmgr.o

		obj-$(CONFIG_CRYPTO_MANAGER2) += cryptomgr.o

crypto/acompress.c

0 → 100644

+118 −0

Original line number	Diff line number	Diff line
		/*
		* Asynchronous Compression operations
		*
		* Copyright (c) 2016, Intel Corporation
		* Authors: Weigang Li <weigang.li@intel.com>
		* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
		*
		* 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 <linux/errno.h>
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/seq_file.h>
		#include <linux/slab.h>
		#include <linux/string.h>
		#include <linux/crypto.h>
		#include <crypto/algapi.h>
		#include <linux/cryptouser.h>
		#include <net/netlink.h>
		#include <crypto/internal/acompress.h>
		#include "internal.h"

		#ifdef CONFIG_NET
		static int crypto_acomp_report(struct sk_buff skb, struct crypto_alg alg)
		{
		struct crypto_report_acomp racomp;

		strncpy(racomp.type, "acomp", sizeof(racomp.type));

		if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP,
		sizeof(struct crypto_report_acomp), &racomp))
		goto nla_put_failure;
		return 0;

		nla_put_failure:
		return -EMSGSIZE;
		}
		#else
		static int crypto_acomp_report(struct sk_buff skb, struct crypto_alg alg)
		{
		return -ENOSYS;
		}
		#endif

		static void crypto_acomp_show(struct seq_file m, struct crypto_alg alg)
		__attribute__ ((unused));

		static void crypto_acomp_show(struct seq_file m, struct crypto_alg alg)
		{
		seq_puts(m, "type : acomp\n");
		}

		static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
		{
		struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
		struct acomp_alg *alg = crypto_acomp_alg(acomp);

		alg->exit(acomp);
		}

		static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
		{
		struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
		struct acomp_alg *alg = crypto_acomp_alg(acomp);

		if (alg->exit)
		acomp->base.exit = crypto_acomp_exit_tfm;

		if (alg->init)
		return alg->init(acomp);

		return 0;
		}

		static const struct crypto_type crypto_acomp_type = {
		.extsize = crypto_alg_extsize,
		.init_tfm = crypto_acomp_init_tfm,
		#ifdef CONFIG_PROC_FS
		.show = crypto_acomp_show,
		#endif
		.report = crypto_acomp_report,
		.maskclear = ~CRYPTO_ALG_TYPE_MASK,
		.maskset = CRYPTO_ALG_TYPE_MASK,
		.type = CRYPTO_ALG_TYPE_ACOMPRESS,
		.tfmsize = offsetof(struct crypto_acomp, base),
		};

		struct crypto_acomp crypto_alloc_acomp(const char alg_name, u32 type,
		u32 mask)
		{
		return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
		}
		EXPORT_SYMBOL_GPL(crypto_alloc_acomp);

		int crypto_register_acomp(struct acomp_alg *alg)
		{
		struct crypto_alg *base = &alg->base;

		base->cra_type = &crypto_acomp_type;
		base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
		base->cra_flags \|= CRYPTO_ALG_TYPE_ACOMPRESS;

		return crypto_register_alg(base);
		}
		EXPORT_SYMBOL_GPL(crypto_register_acomp);

		int crypto_unregister_acomp(struct acomp_alg *alg)
		{
		return crypto_unregister_alg(&alg->base);
		}
		EXPORT_SYMBOL_GPL(crypto_unregister_acomp);

		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("Asynchronous compression type");

crypto/crypto_user.c

+19 −0

Original line number	Diff line number	Diff line
		@@ -112,6 +112,21 @@ static int crypto_report_comp(struct sk_buff skb, struct crypto_alg alg)
		return -EMSGSIZE;
		}

		static int crypto_report_acomp(struct sk_buff skb, struct crypto_alg alg)
		{
		struct crypto_report_acomp racomp;

		strncpy(racomp.type, "acomp", sizeof(racomp.type));

		if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP,
		sizeof(struct crypto_report_acomp), &racomp))
		goto nla_put_failure;
		return 0;

		nla_put_failure:
		return -EMSGSIZE;
		}

		static int crypto_report_akcipher(struct sk_buff skb, struct crypto_alg alg)
		{
		struct crypto_report_akcipher rakcipher;
		@@ -186,7 +201,11 @@ static int crypto_report_one(struct crypto_alg *alg,
		goto nla_put_failure;

		break;
		case CRYPTO_ALG_TYPE_ACOMPRESS:
		if (crypto_report_acomp(skb, alg))
		goto nla_put_failure;

		break;
		case CRYPTO_ALG_TYPE_AKCIPHER:
		if (crypto_report_akcipher(skb, alg))
		goto nla_put_failure;

include/crypto/acompress.h

0 → 100644

+281 −0

Original line number	Diff line number	Diff line
		/*
		* Asynchronous Compression operations
		*
		* Copyright (c) 2016, Intel Corporation
		* Authors: Weigang Li <weigang.li@intel.com>
		* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
		*
		* 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.
		*
		*/
		#ifndef _CRYPTO_ACOMP_H
		#define _CRYPTO_ACOMP_H
		#include <linux/crypto.h>

		#define CRYPTO_ACOMP_ALLOC_OUTPUT 0x00000001

		/**
		* struct acomp_req - asynchronous (de)compression request
		*
		* @base: Common attributes for asynchronous crypto requests
		* @src: Source Data
		* @dst: Destination data
		* @slen: Size of the input buffer
		* @dlen: Size of the output buffer and number of bytes produced
		* @flags: Internal flags
		* @__ctx: Start of private context data
		*/
		struct acomp_req {
		struct crypto_async_request base;
		struct scatterlist *src;
		struct scatterlist *dst;
		unsigned int slen;
		unsigned int dlen;
		u32 flags;
		void *__ctx[] CRYPTO_MINALIGN_ATTR;
		};

		/**
		* struct crypto_acomp - user-instantiated objects which encapsulate
		* algorithms and core processing logic
		*
		* @base: Common crypto API algorithm data structure
		*/
		struct crypto_acomp {
		struct crypto_tfm base;
		};

		/**
		* struct acomp_alg - asynchronous compression algorithm
		*
		* @compress: Function performs a compress operation
		* @decompress: Function performs a de-compress operation
		* @dst_free: Frees destination buffer if allocated inside the algorithm
		* @init: Initialize the cryptographic transformation object.
		* This function is used to initialize the cryptographic
		* transformation object. This function is called only once at
		* the instantiation time, right after the transformation context
		* was allocated. In case the cryptographic hardware has some
		* special requirements which need to be handled by software, this
		* function shall check for the precise requirement of the
		* transformation and put any software fallbacks in place.
		* @exit: Deinitialize the cryptographic transformation object. This is a
		* counterpart to @init, used to remove various changes set in
		* @init.
		*
		* @reqsize: Context size for (de)compression requests
		* @base: Common crypto API algorithm data structure
		*/
		struct acomp_alg {
		int (compress)(struct acomp_req req);
		int (decompress)(struct acomp_req req);
		void (dst_free)(struct scatterlist dst);
		int (init)(struct crypto_acomp tfm);
		void (exit)(struct crypto_acomp tfm);
		unsigned int reqsize;
		struct crypto_alg base;
		};

		/**
		* DOC: Asynchronous Compression API
		*
		* The Asynchronous Compression API is used with the algorithms of type
		* CRYPTO_ALG_TYPE_ACOMPRESS (listed as type "acomp" in /proc/crypto)
		*/

		/**
		* crypto_alloc_acomp() -- allocate ACOMPRESS tfm handle
		* @alg_name: is the cra_name / name or cra_driver_name / driver name of the
		* compression algorithm e.g. "deflate"
		* @type: specifies the type of the algorithm
		* @mask: specifies the mask for the algorithm
		*
		* Allocate a handle for a compression algorithm. The returned struct
		* crypto_acomp is the handle that is required for any subsequent
		* API invocation for the compression operations.
		*
		* Return: allocated handle in case of success; IS_ERR() is true in case
		* of an error, PTR_ERR() returns the error code.
		*/
		struct crypto_acomp crypto_alloc_acomp(const char alg_name, u32 type,
		u32 mask);

		static inline struct crypto_tfm crypto_acomp_tfm(struct crypto_acomp tfm)
		{
		return &tfm->base;
		}

		static inline struct acomp_alg __crypto_acomp_alg(struct crypto_alg alg)
		{
		return container_of(alg, struct acomp_alg, base);
		}

		static inline struct crypto_acomp __crypto_acomp_tfm(struct crypto_tfm tfm)
		{
		return container_of(tfm, struct crypto_acomp, base);
		}

		static inline struct acomp_alg crypto_acomp_alg(struct crypto_acomp tfm)
		{
		return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg);
		}

		static inline unsigned int crypto_acomp_reqsize(struct crypto_acomp *tfm)
		{
		return crypto_acomp_alg(tfm)->reqsize;
		}

		static inline void acomp_request_set_tfm(struct acomp_req *req,
		struct crypto_acomp *tfm)
		{
		req->base.tfm = crypto_acomp_tfm(tfm);
		}

		static inline struct crypto_acomp crypto_acomp_reqtfm(struct acomp_req req)
		{
		return __crypto_acomp_tfm(req->base.tfm);
		}

		/**
		* crypto_free_acomp() -- free ACOMPRESS tfm handle
		*
		* @tfm: ACOMPRESS tfm handle allocated with crypto_alloc_acomp()
		*/
		static inline void crypto_free_acomp(struct crypto_acomp *tfm)
		{
		crypto_destroy_tfm(tfm, crypto_acomp_tfm(tfm));
		}

		static inline int crypto_has_acomp(const char *alg_name, u32 type, u32 mask)
		{
		type &= ~CRYPTO_ALG_TYPE_MASK;
		type \|= CRYPTO_ALG_TYPE_ACOMPRESS;
		mask \|= CRYPTO_ALG_TYPE_MASK;

		return crypto_has_alg(alg_name, type, mask);
		}

		/**
		* acomp_request_alloc() -- allocates asynchronous (de)compression request
		*
		* @tfm: ACOMPRESS tfm handle allocated with crypto_alloc_acomp()
		*
		* Return: allocated handle in case of success or NULL in case of an error
		*/
		static inline struct acomp_req acomp_request_alloc(struct crypto_acomp tfm)
		{
		struct acomp_req *req;

		req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL);
		if (likely(req))
		acomp_request_set_tfm(req, tfm);

		return req;
		}

		/**
		* acomp_request_free() -- zeroize and free asynchronous (de)compression
		* request as well as the output buffer if allocated
		* inside the algorithm
		*
		* @req: request to free
		*/
		static inline void acomp_request_free(struct acomp_req *req)
		{
		struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
		struct acomp_alg *alg = crypto_acomp_alg(tfm);

		if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
		alg->dst_free(req->dst);
		req->dst = NULL;
		}
		kzfree(req);
		}

		/**
		* acomp_request_set_callback() -- Sets an asynchronous callback
		*
		* Callback will be called when an asynchronous operation on a given
		* request is finished.
		*
		* @req: request that the callback will be set for
		* @flgs: specify for instance if the operation may backlog
		* @cmlp: callback which will be called
		* @data: private data used by the caller
		*/
		static inline void acomp_request_set_callback(struct acomp_req *req,
		u32 flgs,
		crypto_completion_t cmpl,
		void *data)
		{
		req->base.complete = cmpl;
		req->base.data = data;
		req->base.flags = flgs;
		}

		/**
		* acomp_request_set_params() -- Sets request parameters
		*
		* Sets parameters required by an acomp operation
		*
		* @req: asynchronous compress request
		* @src: pointer to input buffer scatterlist
		* @dst: pointer to output buffer scatterlist. If this is NULL, the
		* acomp layer will allocate the output memory
		* @slen: size of the input buffer
		* @dlen: size of the output buffer. If dst is NULL, this can be used by
		* the user to specify the maximum amount of memory to allocate
		*/
		static inline void acomp_request_set_params(struct acomp_req *req,
		struct scatterlist *src,
		struct scatterlist *dst,
		unsigned int slen,
		unsigned int dlen)
		{
		req->src = src;
		req->dst = dst;
		req->slen = slen;
		req->dlen = dlen;

		if (!req->dst)
		req->flags \|= CRYPTO_ACOMP_ALLOC_OUTPUT;
		}

		/**
		* crypto_acomp_compress() -- Invoke asynchronous compress operation
		*
		* Function invokes the asynchronous compress operation
		*
		* @req: asynchronous compress request
		*
		* Return: zero on success; error code in case of error
		*/
		static inline int crypto_acomp_compress(struct acomp_req *req)
		{
		struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
		struct acomp_alg *alg = crypto_acomp_alg(tfm);

		return alg->compress(req);
		}

		/**
		* crypto_acomp_decompress() -- Invoke asynchronous decompress operation
		*
		* Function invokes the asynchronous decompress operation
		*
		* @req: asynchronous compress request
		*
		* Return: zero on success; error code in case of error
		*/
		static inline int crypto_acomp_decompress(struct acomp_req *req)
		{
		struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
		struct acomp_alg *alg = crypto_acomp_alg(tfm);

		return alg->decompress(req);
		}

		#endif