crypto: akcipher - add PKE API
Add Public Key Encryption API. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Made CRYPTO_AKCIPHER invisible like other type config options. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>hifive-unleashed-5.1
Tadeusz Struk
Herbert Xu
parent
c2b7b20aed
commit
3c339ab83f
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@ -91,6 +91,15 @@ config CRYPTO_PCOMP2
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tristate
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select CRYPTO_ALGAPI2
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config CRYPTO_AKCIPHER2
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tristate
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select CRYPTO_ALGAPI2
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config CRYPTO_AKCIPHER
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tristate
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select CRYPTO_AKCIPHER2
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select CRYPTO_ALGAPI
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config CRYPTO_MANAGER
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tristate "Cryptographic algorithm manager"
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select CRYPTO_MANAGER2
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@ -28,6 +28,7 @@ crypto_hash-y += shash.o
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obj-$(CONFIG_CRYPTO_HASH2) += crypto_hash.o
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obj-$(CONFIG_CRYPTO_PCOMP2) += pcompress.o
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obj-$(CONFIG_CRYPTO_AKCIPHER2) += akcipher.o
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cryptomgr-y := algboss.o testmgr.o
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@ -0,0 +1,117 @@
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/*
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* Public Key Encryption
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*
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* Copyright (c) 2015, Intel Corporation
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* Authors: Tadeusz Struk <tadeusz.struk@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/akcipher.h>
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#include <crypto/public_key.h>
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#include "internal.h"
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#ifdef CONFIG_NET
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static int crypto_akcipher_report(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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strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
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if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
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sizeof(struct crypto_report_akcipher), &rakcipher))
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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_akcipher_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_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
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__attribute__ ((unused));
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static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
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{
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seq_puts(m, "type : akcipher\n");
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}
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static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
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struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
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alg->exit(akcipher);
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}
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static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
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struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
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if (alg->exit)
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akcipher->base.exit = crypto_akcipher_exit_tfm;
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if (alg->init)
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return alg->init(akcipher);
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return 0;
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}
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static const struct crypto_type crypto_akcipher_type = {
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.extsize = crypto_alg_extsize,
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.init_tfm = crypto_akcipher_init_tfm,
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#ifdef CONFIG_PROC_FS
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.show = crypto_akcipher_show,
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#endif
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.report = crypto_akcipher_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_AKCIPHER,
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.tfmsize = offsetof(struct crypto_akcipher, base),
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};
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struct crypto_akcipher *crypto_alloc_akcipher(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_akcipher_type, type, mask);
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}
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EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
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int crypto_register_akcipher(struct akcipher_alg *alg)
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{
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struct crypto_alg *base = &alg->base;
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base->cra_type = &crypto_akcipher_type;
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base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
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base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
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return crypto_register_alg(base);
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}
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EXPORT_SYMBOL_GPL(crypto_register_akcipher);
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void crypto_unregister_akcipher(struct akcipher_alg *alg)
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{
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crypto_unregister_alg(&alg->base);
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}
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EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Generic public key cihper type");
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@ -27,6 +27,7 @@
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#include <net/net_namespace.h>
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#include <crypto/internal/aead.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/akcipher.h>
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#include "internal.h"
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@ -110,6 +111,21 @@ 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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strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
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if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
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sizeof(struct crypto_report_akcipher), &rakcipher))
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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_one(struct crypto_alg *alg,
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struct crypto_user_alg *ualg, struct sk_buff *skb)
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{
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@ -154,6 +170,12 @@ 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_AKCIPHER:
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if (crypto_report_akcipher(skb, alg))
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goto nla_put_failure;
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break;
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}
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out:
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@ -0,0 +1,340 @@
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/*
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* Public Key Encryption
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*
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* Copyright (c) 2015, Intel Corporation
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* Authors: Tadeusz Struk <tadeusz.struk@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_AKCIPHER_H
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#define _CRYPTO_AKCIPHER_H
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#include <linux/crypto.h>
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/**
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* struct akcipher_request - public key request
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*
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* @base: Common attributes for async crypto requests
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* @src: Pointer to memory containing the input parameters
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* The format of the parameter(s) is expeted to be Octet String
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* @dst: Pointer to memory whare the result will be stored
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* @src_len: Size of the input parameter
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* @dst_len: Size of the output buffer. It needs to be at leaset
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* as big as the expected result depending on the operation
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* After operation it will be updated with the acctual size of the
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* result. In case of error, where the dst_len was insufficient,
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* it will be updated to the size required for the operation.
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* @__ctx: Start of private context data
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*/
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struct akcipher_request {
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struct crypto_async_request base;
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void *src;
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void *dst;
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unsigned int src_len;
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unsigned int dst_len;
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void *__ctx[] CRYPTO_MINALIGN_ATTR;
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};
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/**
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* struct crypto_akcipher - 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_akcipher {
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struct crypto_tfm base;
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};
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/**
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* struct akcipher_alg - generic public key algorithm
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*
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* @sign: Function performs a sign operation as defined by public key
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* algorithm. In case of error, where the dst_len was insufficient,
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* the req->dst_len will be updated to the size required for the
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* operation
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* @verify: Function performs a sign operation as defined by public key
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* algorithm. In case of error, where the dst_len was insufficient,
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* the req->dst_len will be updated to the size required for the
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* operation
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* @encrypt: Function performs an encrytp operation as defined by public key
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* algorithm. In case of error, where the dst_len was insufficient,
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* the req->dst_len will be updated to the size required for the
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* operation
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* @decrypt: Function performs a decrypt operation as defined by public key
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* algorithm. In case of error, where the dst_len was insufficient,
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* the req->dst_len will be updated to the size required for the
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* operation
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* @setkey: Function invokes the algorithm specific set key function, which
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* knows how to decode and interpret the BER encoded key
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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: Request context size required by algorithm implementation
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* @base: Common crypto API algorithm data structure
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*/
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struct akcipher_alg {
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int (*sign)(struct akcipher_request *req);
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int (*verify)(struct akcipher_request *req);
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int (*encrypt)(struct akcipher_request *req);
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int (*decrypt)(struct akcipher_request *req);
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int (*setkey)(struct crypto_akcipher *tfm, const void *key,
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unsigned int keylen);
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int (*init)(struct crypto_akcipher *tfm);
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void (*exit)(struct crypto_akcipher *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: Generic Public Key API
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*
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* The Public Key API is used with the algorithms of type
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* CRYPTO_ALG_TYPE_AKCIPHER (listed as type "akcipher" in /proc/crypto)
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*/
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/**
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* crypto_alloc_akcipher() -- allocate AKCIPHER 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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* public key algorithm e.g. "rsa"
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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 public key algorithm. The returned struct
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* crypto_akcipher is the handle that is required for any subsequent
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* API invocation for the public key 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_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
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u32 mask);
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static inline struct crypto_tfm *crypto_akcipher_tfm(
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struct crypto_akcipher *tfm)
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{
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return &tfm->base;
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}
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static inline struct akcipher_alg *__crypto_akcipher_alg(struct crypto_alg *alg)
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{
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return container_of(alg, struct akcipher_alg, base);
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}
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static inline struct crypto_akcipher *__crypto_akcipher_tfm(
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struct crypto_tfm *tfm)
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{
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return container_of(tfm, struct crypto_akcipher, base);
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}
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static inline struct akcipher_alg *crypto_akcipher_alg(
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struct crypto_akcipher *tfm)
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{
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return __crypto_akcipher_alg(crypto_akcipher_tfm(tfm)->__crt_alg);
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}
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static inline unsigned int crypto_akcipher_reqsize(struct crypto_akcipher *tfm)
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{
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return crypto_akcipher_alg(tfm)->reqsize;
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}
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static inline void akcipher_request_set_tfm(struct akcipher_request *req,
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struct crypto_akcipher *tfm)
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{
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req->base.tfm = crypto_akcipher_tfm(tfm);
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}
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static inline struct crypto_akcipher *crypto_akcipher_reqtfm(
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struct akcipher_request *req)
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{
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return __crypto_akcipher_tfm(req->base.tfm);
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}
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/**
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* crypto_free_akcipher() -- free AKCIPHER tfm handle
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*
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* @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
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*/
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static inline void crypto_free_akcipher(struct crypto_akcipher *tfm)
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{
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crypto_destroy_tfm(tfm, crypto_akcipher_tfm(tfm));
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}
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/**
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* akcipher_request_alloc() -- allocates public key request
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*
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* @tfm: AKCIPHER tfm handle allocated with crypto_alloc_akcipher()
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* @gfp: allocation flags
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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 akcipher_request *akcipher_request_alloc(
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struct crypto_akcipher *tfm, gfp_t gfp)
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{
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struct akcipher_request *req;
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req = kmalloc(sizeof(*req) + crypto_akcipher_reqsize(tfm), gfp);
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if (likely(req))
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akcipher_request_set_tfm(req, tfm);
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return req;
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}
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/**
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* akcipher_request_free() -- zeroize and free public key request
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*
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* @req: request to free
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*/
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static inline void akcipher_request_free(struct akcipher_request *req)
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{
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kzfree(req);
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}
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/**
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* akcipher_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 akcipher_request_set_callback(struct akcipher_request *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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* akcipher_request_set_crypt() -- Sets reqest parameters
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*
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* Sets parameters required by crypto operation
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*
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* @req: public key request
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* @src: ptr to input parameter
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* @dst: ptr of output parameter
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* @src_len: size of the input buffer
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* @dst_len: size of the output buffer. It will be updated by the
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* implementation to reflect the acctual size of the result
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*/
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static inline void akcipher_request_set_crypt(struct akcipher_request *req,
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void *src, void *dst,
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unsigned int src_len,
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unsigned int dst_len)
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{
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req->src = src;
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req->dst = dst;
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req->src_len = src_len;
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req->dst_len = dst_len;
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}
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/**
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* crypto_akcipher_encrypt() -- Invoke public key encrypt operation
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*
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* Function invokes the specific public key encrypt operation for a given
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* public key algorithm
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*
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* @req: asymmetric key 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_akcipher_encrypt(struct akcipher_request *req)
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{
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struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
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struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
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return alg->encrypt(req);
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}
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/**
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* crypto_akcipher_decrypt() -- Invoke public key decrypt operation
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*
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* Function invokes the specific public key decrypt operation for a given
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* public key algorithm
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*
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* @req: asymmetric key 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_akcipher_decrypt(struct akcipher_request *req)
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{
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struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
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struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
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return alg->decrypt(req);
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}
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/**
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* crypto_akcipher_sign() -- Invoke public key sign operation
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*
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* Function invokes the specific public key sign operation for a given
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* public key algorithm
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||||
*
|
||||
* @req: asymmetric key request
|
||||
*
|
||||
* Return: zero on success; error code in case of error
|
||||
*/
|
||||
static inline int crypto_akcipher_sign(struct akcipher_request *req)
|
||||
{
|
||||
struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
|
||||
struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
|
||||
|
||||
return alg->sign(req);
|
||||
}
|
||||
|
||||
/**
|
||||
* crypto_akcipher_verify() -- Invoke public key verify operation
|
||||
*
|
||||
* Function invokes the specific public key verify operation for a given
|
||||
* public key algorithm
|
||||
*
|
||||
* @req: asymmetric key request
|
||||
*
|
||||
* Return: zero on success; error code in case of error
|
||||
*/
|
||||
static inline int crypto_akcipher_verify(struct akcipher_request *req)
|
||||
{
|
||||
struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
|
||||
struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
|
||||
|
||||
return alg->verify(req);
|
||||
}
|
||||
|
||||
/**
|
||||
* crypto_akcipher_setkey() -- Invoke public key setkey operation
|
||||
*
|
||||
* Function invokes the algorithm specific set key function, which knows
|
||||
* how to decode and interpret the encoded key
|
||||
*
|
||||
* @tfm: tfm handle
|
||||
* @key: BER encoded private or public key
|
||||
* @keylen: length of the key
|
||||
*
|
||||
* Return: zero on success; error code in case of error
|
||||
*/
|
||||
static inline int crypto_akcipher_setkey(struct crypto_akcipher *tfm, void *key,
|
||||
unsigned int keylen)
|
||||
{
|
||||
struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
|
||||
|
||||
return alg->setkey(tfm, key, keylen);
|
||||
}
|
||||
#endif
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
/*
|
||||
* Public Key Encryption
|
||||
*
|
||||
* Copyright (c) 2015, Intel Corporation
|
||||
* Authors: Tadeusz Struk <tadeusz.struk@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_AKCIPHER_INT_H
|
||||
#define _CRYPTO_AKCIPHER_INT_H
|
||||
#include <crypto/akcipher.h>
|
||||
|
||||
/*
|
||||
* Transform internal helpers.
|
||||
*/
|
||||
static inline void *akcipher_request_ctx(struct akcipher_request *req)
|
||||
{
|
||||
return req->__ctx;
|
||||
}
|
||||
|
||||
static inline void *akcipher_tfm_ctx(struct crypto_akcipher *tfm)
|
||||
{
|
||||
return tfm->base.__crt_ctx;
|
||||
}
|
||||
|
||||
static inline void akcipher_request_complete(struct akcipher_request *req,
|
||||
int err)
|
||||
{
|
||||
req->base.complete(&req->base, err);
|
||||
}
|
||||
|
||||
static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
|
||||
{
|
||||
return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
|
||||
}
|
||||
|
||||
/**
|
||||
* crypto_register_akcipher() -- Register public key algorithm
|
||||
*
|
||||
* Function registers an implementation of a public key verify algorithm
|
||||
*
|
||||
* @alg: algorithm definition
|
||||
*
|
||||
* Return: zero on success; error code in case of error
|
||||
*/
|
||||
int crypto_register_akcipher(struct akcipher_alg *alg);
|
||||
|
||||
/**
|
||||
* crypto_unregister_akcipher() -- Unregister public key algorithm
|
||||
*
|
||||
* Function unregisters an implementation of a public key verify algorithm
|
||||
*
|
||||
* @alg: algorithm definition
|
||||
*/
|
||||
void crypto_unregister_akcipher(struct akcipher_alg *alg);
|
||||
#endif
|
||||
|
|
@ -53,6 +53,7 @@
|
|||
#define CRYPTO_ALG_TYPE_SHASH 0x00000009
|
||||
#define CRYPTO_ALG_TYPE_AHASH 0x0000000a
|
||||
#define CRYPTO_ALG_TYPE_RNG 0x0000000c
|
||||
#define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d
|
||||
#define CRYPTO_ALG_TYPE_PCOMPRESS 0x0000000f
|
||||
|
||||
#define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e
|
||||
|
|
|
|||
|
|
@ -43,6 +43,7 @@ enum crypto_attr_type_t {
|
|||
CRYPTOCFGA_REPORT_COMPRESS, /* struct crypto_report_comp */
|
||||
CRYPTOCFGA_REPORT_RNG, /* struct crypto_report_rng */
|
||||
CRYPTOCFGA_REPORT_CIPHER, /* struct crypto_report_cipher */
|
||||
CRYPTOCFGA_REPORT_AKCIPHER, /* struct crypto_report_akcipher */
|
||||
__CRYPTOCFGA_MAX
|
||||
|
||||
#define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
|
||||
|
|
@ -101,5 +102,9 @@ struct crypto_report_rng {
|
|||
unsigned int seedsize;
|
||||
};
|
||||
|
||||
struct crypto_report_akcipher {
|
||||
char type[CRYPTO_MAX_NAME];
|
||||
};
|
||||
|
||||
#define CRYPTO_REPORT_MAXSIZE (sizeof(struct crypto_user_alg) + \
|
||||
sizeof(struct crypto_report_blkcipher))
|
||||
|
|
|
|||
Loading…
Reference in New Issue