crypto: acomp - add asynchronous compression api
Add acomp, an asynchronous compression api that uses scatterlist buffers. Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Giovanni Cabiddu
Herbert Xu
parent
c8d283ff8b
commit
2ebda74fd6
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@ -102,6 +102,15 @@ config CRYPTO_KPP
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select CRYPTO_ALGAPI
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select CRYPTO_KPP2
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config CRYPTO_ACOMP2
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tristate
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select CRYPTO_ALGAPI2
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config CRYPTO_ACOMP
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tristate
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select CRYPTO_ALGAPI
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select CRYPTO_ACOMP2
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config CRYPTO_RSA
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tristate "RSA algorithm"
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select CRYPTO_AKCIPHER
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@ -138,6 +147,7 @@ config CRYPTO_MANAGER2
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select CRYPTO_BLKCIPHER2
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select CRYPTO_AKCIPHER2
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select CRYPTO_KPP2
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select CRYPTO_ACOMP2
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config CRYPTO_USER
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tristate "Userspace cryptographic algorithm configuration"
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@ -50,6 +50,8 @@ rsa_generic-y += rsa_helper.o
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rsa_generic-y += rsa-pkcs1pad.o
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obj-$(CONFIG_CRYPTO_RSA) += rsa_generic.o
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obj-$(CONFIG_CRYPTO_ACOMP2) += acompress.o
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cryptomgr-y := algboss.o testmgr.o
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obj-$(CONFIG_CRYPTO_MANAGER2) += cryptomgr.o
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@ -0,0 +1,118 @@
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/*
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* Asynchronous Compression operations
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*
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* Copyright (c) 2016, Intel Corporation
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* Authors: Weigang Li <weigang.li@intel.com>
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* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/crypto.h>
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#include <crypto/algapi.h>
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#include <linux/cryptouser.h>
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#include <net/netlink.h>
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#include <crypto/internal/acompress.h>
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#include "internal.h"
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#ifdef CONFIG_NET
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static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_report_acomp racomp;
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strncpy(racomp.type, "acomp", sizeof(racomp.type));
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if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP,
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sizeof(struct crypto_report_acomp), &racomp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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#else
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static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
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{
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return -ENOSYS;
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}
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#endif
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static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
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__attribute__ ((unused));
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static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
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{
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seq_puts(m, "type : acomp\n");
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}
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static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
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struct acomp_alg *alg = crypto_acomp_alg(acomp);
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alg->exit(acomp);
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}
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static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
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struct acomp_alg *alg = crypto_acomp_alg(acomp);
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if (alg->exit)
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acomp->base.exit = crypto_acomp_exit_tfm;
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if (alg->init)
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return alg->init(acomp);
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return 0;
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}
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static const struct crypto_type crypto_acomp_type = {
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.extsize = crypto_alg_extsize,
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.init_tfm = crypto_acomp_init_tfm,
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#ifdef CONFIG_PROC_FS
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.show = crypto_acomp_show,
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#endif
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.report = crypto_acomp_report,
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.maskclear = ~CRYPTO_ALG_TYPE_MASK,
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.maskset = CRYPTO_ALG_TYPE_MASK,
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.type = CRYPTO_ALG_TYPE_ACOMPRESS,
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.tfmsize = offsetof(struct crypto_acomp, base),
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};
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struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
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u32 mask)
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{
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return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
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}
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EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
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int crypto_register_acomp(struct acomp_alg *alg)
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{
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struct crypto_alg *base = &alg->base;
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base->cra_type = &crypto_acomp_type;
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base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
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base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;
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return crypto_register_alg(base);
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}
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EXPORT_SYMBOL_GPL(crypto_register_acomp);
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int crypto_unregister_acomp(struct acomp_alg *alg)
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{
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return crypto_unregister_alg(&alg->base);
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}
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EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Asynchronous compression type");
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@ -112,6 +112,21 @@ nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_report_acomp racomp;
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strncpy(racomp.type, "acomp", sizeof(racomp.type));
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if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP,
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sizeof(struct crypto_report_acomp), &racomp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_report_akcipher rakcipher;
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@ -186,7 +201,11 @@ static int crypto_report_one(struct crypto_alg *alg,
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_ACOMPRESS:
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if (crypto_report_acomp(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_AKCIPHER:
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if (crypto_report_akcipher(skb, alg))
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goto nla_put_failure;
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@ -0,0 +1,281 @@
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/*
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* Asynchronous Compression operations
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*
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* Copyright (c) 2016, Intel Corporation
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* Authors: Weigang Li <weigang.li@intel.com>
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* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_ACOMP_H
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#define _CRYPTO_ACOMP_H
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#include <linux/crypto.h>
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#define CRYPTO_ACOMP_ALLOC_OUTPUT 0x00000001
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/**
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* struct acomp_req - asynchronous (de)compression request
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*
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* @base: Common attributes for asynchronous crypto requests
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* @src: Source Data
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* @dst: Destination data
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* @slen: Size of the input buffer
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* @dlen: Size of the output buffer and number of bytes produced
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* @flags: Internal flags
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* @__ctx: Start of private context data
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*/
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struct acomp_req {
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struct crypto_async_request base;
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struct scatterlist *src;
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struct scatterlist *dst;
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unsigned int slen;
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unsigned int dlen;
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u32 flags;
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void *__ctx[] CRYPTO_MINALIGN_ATTR;
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};
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/**
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* struct crypto_acomp - user-instantiated objects which encapsulate
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* algorithms and core processing logic
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*
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* @base: Common crypto API algorithm data structure
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*/
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struct crypto_acomp {
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struct crypto_tfm base;
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};
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/**
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* struct acomp_alg - asynchronous compression algorithm
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*
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* @compress: Function performs a compress operation
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* @decompress: Function performs a de-compress operation
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* @dst_free: Frees destination buffer if allocated inside the algorithm
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* @init: Initialize the cryptographic transformation object.
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* This function is used to initialize the cryptographic
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* transformation object. This function is called only once at
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* the instantiation time, right after the transformation context
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* was allocated. In case the cryptographic hardware has some
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* special requirements which need to be handled by software, this
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* function shall check for the precise requirement of the
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* transformation and put any software fallbacks in place.
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* @exit: Deinitialize the cryptographic transformation object. This is a
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* counterpart to @init, used to remove various changes set in
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* @init.
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*
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* @reqsize: Context size for (de)compression requests
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* @base: Common crypto API algorithm data structure
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*/
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struct acomp_alg {
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int (*compress)(struct acomp_req *req);
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int (*decompress)(struct acomp_req *req);
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void (*dst_free)(struct scatterlist *dst);
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int (*init)(struct crypto_acomp *tfm);
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void (*exit)(struct crypto_acomp *tfm);
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unsigned int reqsize;
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struct crypto_alg base;
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};
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/**
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* DOC: Asynchronous Compression API
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*
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* The Asynchronous Compression API is used with the algorithms of type
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* CRYPTO_ALG_TYPE_ACOMPRESS (listed as type "acomp" in /proc/crypto)
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*/
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/**
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* crypto_alloc_acomp() -- allocate ACOMPRESS tfm handle
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* @alg_name: is the cra_name / name or cra_driver_name / driver name of the
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* compression algorithm e.g. "deflate"
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* @type: specifies the type of the algorithm
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* @mask: specifies the mask for the algorithm
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*
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* Allocate a handle for a compression algorithm. The returned struct
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* crypto_acomp is the handle that is required for any subsequent
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* API invocation for the compression operations.
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*
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* Return: allocated handle in case of success; IS_ERR() is true in case
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* of an error, PTR_ERR() returns the error code.
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*/
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struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
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u32 mask);
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static inline struct crypto_tfm *crypto_acomp_tfm(struct crypto_acomp *tfm)
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{
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return &tfm->base;
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}
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static inline struct acomp_alg *__crypto_acomp_alg(struct crypto_alg *alg)
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{
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return container_of(alg, struct acomp_alg, base);
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}
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static inline struct crypto_acomp *__crypto_acomp_tfm(struct crypto_tfm *tfm)
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{
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return container_of(tfm, struct crypto_acomp, base);
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}
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static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm)
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{
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return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg);
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}
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static inline unsigned int crypto_acomp_reqsize(struct crypto_acomp *tfm)
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{
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return crypto_acomp_alg(tfm)->reqsize;
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}
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static inline void acomp_request_set_tfm(struct acomp_req *req,
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struct crypto_acomp *tfm)
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{
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req->base.tfm = crypto_acomp_tfm(tfm);
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}
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static inline struct crypto_acomp *crypto_acomp_reqtfm(struct acomp_req *req)
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{
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return __crypto_acomp_tfm(req->base.tfm);
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}
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/**
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* crypto_free_acomp() -- free ACOMPRESS tfm handle
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*
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* @tfm: ACOMPRESS tfm handle allocated with crypto_alloc_acomp()
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*/
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static inline void crypto_free_acomp(struct crypto_acomp *tfm)
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{
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crypto_destroy_tfm(tfm, crypto_acomp_tfm(tfm));
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}
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static inline int crypto_has_acomp(const char *alg_name, u32 type, u32 mask)
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{
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type &= ~CRYPTO_ALG_TYPE_MASK;
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type |= CRYPTO_ALG_TYPE_ACOMPRESS;
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mask |= CRYPTO_ALG_TYPE_MASK;
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return crypto_has_alg(alg_name, type, mask);
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}
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/**
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* acomp_request_alloc() -- allocates asynchronous (de)compression request
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*
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* @tfm: ACOMPRESS tfm handle allocated with crypto_alloc_acomp()
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*
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* Return: allocated handle in case of success or NULL in case of an error
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*/
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static inline struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm)
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{
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struct acomp_req *req;
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req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL);
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if (likely(req))
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acomp_request_set_tfm(req, tfm);
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return req;
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}
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/**
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* acomp_request_free() -- zeroize and free asynchronous (de)compression
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* request as well as the output buffer if allocated
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* inside the algorithm
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*
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* @req: request to free
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*/
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static inline void acomp_request_free(struct acomp_req *req)
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{
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struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
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struct acomp_alg *alg = crypto_acomp_alg(tfm);
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if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
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alg->dst_free(req->dst);
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req->dst = NULL;
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}
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kzfree(req);
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}
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/**
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* acomp_request_set_callback() -- Sets an asynchronous callback
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*
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* Callback will be called when an asynchronous operation on a given
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* request is finished.
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*
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* @req: request that the callback will be set for
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* @flgs: specify for instance if the operation may backlog
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* @cmlp: callback which will be called
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* @data: private data used by the caller
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*/
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static inline void acomp_request_set_callback(struct acomp_req *req,
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u32 flgs,
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crypto_completion_t cmpl,
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void *data)
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{
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req->base.complete = cmpl;
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req->base.data = data;
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req->base.flags = flgs;
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}
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/**
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* acomp_request_set_params() -- Sets request parameters
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*
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* Sets parameters required by an acomp operation
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*
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* @req: asynchronous compress request
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* @src: pointer to input buffer scatterlist
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* @dst: pointer to output buffer scatterlist. If this is NULL, the
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* acomp layer will allocate the output memory
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* @slen: size of the input buffer
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* @dlen: size of the output buffer. If dst is NULL, this can be used by
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* the user to specify the maximum amount of memory to allocate
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*/
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static inline void acomp_request_set_params(struct acomp_req *req,
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struct scatterlist *src,
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struct scatterlist *dst,
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unsigned int slen,
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unsigned int dlen)
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{
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req->src = src;
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req->dst = dst;
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req->slen = slen;
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req->dlen = dlen;
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if (!req->dst)
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req->flags |= CRYPTO_ACOMP_ALLOC_OUTPUT;
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}
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/**
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* crypto_acomp_compress() -- Invoke asynchronous compress operation
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*
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* Function invokes the asynchronous compress operation
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*
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* @req: asynchronous compress request
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*
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* Return: zero on success; error code in case of error
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*/
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static inline int crypto_acomp_compress(struct acomp_req *req)
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{
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struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
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struct acomp_alg *alg = crypto_acomp_alg(tfm);
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return alg->compress(req);
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}
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/**
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* crypto_acomp_decompress() -- Invoke asynchronous decompress operation
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*
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* Function invokes the asynchronous decompress operation
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*
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* @req: asynchronous compress request
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*
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* Return: zero on success; error code in case of error
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*/
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static inline int crypto_acomp_decompress(struct acomp_req *req)
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{
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struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
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struct acomp_alg *alg = crypto_acomp_alg(tfm);
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return alg->decompress(req);
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}
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#endif
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@ -0,0 +1,66 @@
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/*
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* Asynchronous Compression operations
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*
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* Copyright (c) 2016, Intel Corporation
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* Authors: Weigang Li <weigang.li@intel.com>
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* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
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*
|
||||
* 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_INT_H
|
||||
#define _CRYPTO_ACOMP_INT_H
|
||||
#include <crypto/acompress.h>
|
||||
|
||||
/*
|
||||
* Transform internal helpers.
|
||||
*/
|
||||
static inline void *acomp_request_ctx(struct acomp_req *req)
|
||||
{
|
||||
return req->__ctx;
|
||||
}
|
||||
|
||||
static inline void *acomp_tfm_ctx(struct crypto_acomp *tfm)
|
||||
{
|
||||
return tfm->base.__crt_ctx;
|
||||
}
|
||||
|
||||
static inline void acomp_request_complete(struct acomp_req *req,
|
||||
int err)
|
||||
{
|
||||
req->base.complete(&req->base, err);
|
||||
}
|
||||
|
||||
static inline const char *acomp_alg_name(struct crypto_acomp *tfm)
|
||||
{
|
||||
return crypto_acomp_tfm(tfm)->__crt_alg->cra_name;
|
||||
}
|
||||
|
||||
/**
|
||||
* crypto_register_acomp() -- Register asynchronous compression algorithm
|
||||
*
|
||||
* Function registers an implementation of an asynchronous
|
||||
* compression algorithm
|
||||
*
|
||||
* @alg: algorithm definition
|
||||
*
|
||||
* Return: zero on success; error code in case of error
|
||||
*/
|
||||
int crypto_register_acomp(struct acomp_alg *alg);
|
||||
|
||||
/**
|
||||
* crypto_unregister_acomp() -- Unregister asynchronous compression algorithm
|
||||
*
|
||||
* Function unregisters an implementation of an asynchronous
|
||||
* compression algorithm
|
||||
*
|
||||
* @alg: algorithm definition
|
||||
*
|
||||
* Return: zero on success; error code in case of error
|
||||
*/
|
||||
int crypto_unregister_acomp(struct acomp_alg *alg);
|
||||
|
||||
#endif
|
||||
|
|
@ -50,6 +50,7 @@
|
|||
#define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
|
||||
#define CRYPTO_ALG_TYPE_GIVCIPHER 0x00000006
|
||||
#define CRYPTO_ALG_TYPE_KPP 0x00000008
|
||||
#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
|
||||
#define CRYPTO_ALG_TYPE_RNG 0x0000000c
|
||||
#define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d
|
||||
#define CRYPTO_ALG_TYPE_DIGEST 0x0000000e
|
||||
|
|
|
|||
|
|
@ -46,6 +46,7 @@ enum crypto_attr_type_t {
|
|||
CRYPTOCFGA_REPORT_CIPHER, /* struct crypto_report_cipher */
|
||||
CRYPTOCFGA_REPORT_AKCIPHER, /* struct crypto_report_akcipher */
|
||||
CRYPTOCFGA_REPORT_KPP, /* struct crypto_report_kpp */
|
||||
CRYPTOCFGA_REPORT_ACOMP, /* struct crypto_report_acomp */
|
||||
__CRYPTOCFGA_MAX
|
||||
|
||||
#define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
|
||||
|
|
@ -112,5 +113,9 @@ struct crypto_report_kpp {
|
|||
char type[CRYPTO_MAX_NAME];
|
||||
};
|
||||
|
||||
struct crypto_report_acomp {
|
||||
char type[CRYPTO_MAX_NAME];
|
||||
};
|
||||
|
||||
#define CRYPTO_REPORT_MAXSIZE (sizeof(struct crypto_user_alg) + \
|
||||
sizeof(struct crypto_report_blkcipher))
|
||||
|
|
|
|||
Loading…
Reference in New Issue