2019-05-26 23:55:01 -07:00
|
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
2015-06-16 10:30:55 -07:00
|
|
|
/*
|
|
|
|
* Public Key Encryption
|
|
|
|
*
|
|
|
|
* Copyright (c) 2015, Intel Corporation
|
|
|
|
* Authors: Tadeusz Struk <tadeusz.struk@intel.com>
|
|
|
|
*/
|
2023-02-16 03:35:13 -07:00
|
|
|
#include <crypto/internal/akcipher.h>
|
|
|
|
#include <linux/cryptouser.h>
|
2015-06-16 10:30:55 -07:00
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
2023-06-15 03:28:46 -07:00
|
|
|
#include <linux/scatterlist.h>
|
2015-06-16 10:30:55 -07:00
|
|
|
#include <linux/seq_file.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <net/netlink.h>
|
2023-02-16 03:35:13 -07:00
|
|
|
|
2015-06-16 10:30:55 -07:00
|
|
|
#include "internal.h"
|
|
|
|
|
2023-06-15 03:28:48 -07:00
|
|
|
#define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e
|
2023-06-15 03:28:46 -07:00
|
|
|
|
2023-02-16 03:35:28 -07:00
|
|
|
static int __maybe_unused crypto_akcipher_report(
|
|
|
|
struct sk_buff *skb, struct crypto_alg *alg)
|
2015-06-16 10:30:55 -07:00
|
|
|
{
|
|
|
|
struct crypto_report_akcipher rakcipher;
|
|
|
|
|
2018-11-03 14:56:03 -07:00
|
|
|
memset(&rakcipher, 0, sizeof(rakcipher));
|
2015-06-16 10:30:55 -07:00
|
|
|
|
2018-11-03 14:56:03 -07:00
|
|
|
strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
|
2015-06-16 10:30:55 -07:00
|
|
|
|
2018-11-03 14:56:03 -07:00
|
|
|
return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
|
|
|
|
sizeof(rakcipher), &rakcipher);
|
2015-06-16 10:30:55 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
|
2016-12-31 08:56:23 -07:00
|
|
|
__maybe_unused;
|
2015-06-16 10:30:55 -07:00
|
|
|
|
|
|
|
static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
|
|
|
|
{
|
|
|
|
seq_puts(m, "type : akcipher\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
|
|
|
|
struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
|
|
|
|
|
|
|
|
alg->exit(akcipher);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
|
|
|
|
struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
|
|
|
|
|
|
|
|
if (alg->exit)
|
|
|
|
akcipher->base.exit = crypto_akcipher_exit_tfm;
|
|
|
|
|
|
|
|
if (alg->init)
|
|
|
|
return alg->init(akcipher);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-12-05 09:09:33 -07:00
|
|
|
static void crypto_akcipher_free_instance(struct crypto_instance *inst)
|
|
|
|
{
|
|
|
|
struct akcipher_instance *akcipher = akcipher_instance(inst);
|
|
|
|
|
|
|
|
akcipher->free(akcipher);
|
|
|
|
}
|
|
|
|
|
2015-06-16 10:30:55 -07:00
|
|
|
static const struct crypto_type crypto_akcipher_type = {
|
|
|
|
.extsize = crypto_alg_extsize,
|
|
|
|
.init_tfm = crypto_akcipher_init_tfm,
|
2015-12-05 09:09:33 -07:00
|
|
|
.free = crypto_akcipher_free_instance,
|
2015-06-16 10:30:55 -07:00
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
.show = crypto_akcipher_show,
|
|
|
|
#endif
|
2023-05-02 01:02:33 -07:00
|
|
|
#if IS_ENABLED(CONFIG_CRYPTO_USER)
|
2015-06-16 10:30:55 -07:00
|
|
|
.report = crypto_akcipher_report,
|
2023-02-16 03:35:13 -07:00
|
|
|
#endif
|
2015-06-16 10:30:55 -07:00
|
|
|
.maskclear = ~CRYPTO_ALG_TYPE_MASK,
|
2023-06-15 03:28:48 -07:00
|
|
|
.maskset = CRYPTO_ALG_TYPE_AHASH_MASK,
|
2015-06-16 10:30:55 -07:00
|
|
|
.type = CRYPTO_ALG_TYPE_AKCIPHER,
|
|
|
|
.tfmsize = offsetof(struct crypto_akcipher, base),
|
|
|
|
};
|
|
|
|
|
2020-01-02 20:58:47 -07:00
|
|
|
int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
|
|
|
|
struct crypto_instance *inst,
|
|
|
|
const char *name, u32 type, u32 mask)
|
2015-12-05 09:09:33 -07:00
|
|
|
{
|
|
|
|
spawn->base.frontend = &crypto_akcipher_type;
|
2020-01-02 20:58:48 -07:00
|
|
|
return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
|
2015-12-05 09:09:33 -07:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
|
|
|
|
|
2015-06-16 10:30:55 -07:00
|
|
|
struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
|
|
|
|
u32 mask)
|
|
|
|
{
|
|
|
|
return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
|
|
|
|
|
2015-12-05 09:09:33 -07:00
|
|
|
static void akcipher_prepare_alg(struct akcipher_alg *alg)
|
2015-06-16 10:30:55 -07:00
|
|
|
{
|
|
|
|
struct crypto_alg *base = &alg->base;
|
|
|
|
|
|
|
|
base->cra_type = &crypto_akcipher_type;
|
|
|
|
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
|
|
|
|
base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
|
2015-12-05 09:09:33 -07:00
|
|
|
}
|
|
|
|
|
2019-04-11 08:51:13 -07:00
|
|
|
static int akcipher_default_op(struct akcipher_request *req)
|
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
2022-08-31 11:37:06 -07:00
|
|
|
static int akcipher_default_set_key(struct crypto_akcipher *tfm,
|
|
|
|
const void *key, unsigned int keylen)
|
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
2015-12-05 09:09:33 -07:00
|
|
|
int crypto_register_akcipher(struct akcipher_alg *alg)
|
|
|
|
{
|
|
|
|
struct crypto_alg *base = &alg->base;
|
|
|
|
|
2019-04-11 08:51:13 -07:00
|
|
|
if (!alg->sign)
|
|
|
|
alg->sign = akcipher_default_op;
|
|
|
|
if (!alg->verify)
|
|
|
|
alg->verify = akcipher_default_op;
|
|
|
|
if (!alg->encrypt)
|
|
|
|
alg->encrypt = akcipher_default_op;
|
|
|
|
if (!alg->decrypt)
|
|
|
|
alg->decrypt = akcipher_default_op;
|
2022-08-31 11:37:06 -07:00
|
|
|
if (!alg->set_priv_key)
|
|
|
|
alg->set_priv_key = akcipher_default_set_key;
|
2019-04-11 08:51:13 -07:00
|
|
|
|
2015-12-05 09:09:33 -07:00
|
|
|
akcipher_prepare_alg(alg);
|
2015-06-16 10:30:55 -07:00
|
|
|
return crypto_register_alg(base);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_register_akcipher);
|
|
|
|
|
|
|
|
void crypto_unregister_akcipher(struct akcipher_alg *alg)
|
|
|
|
{
|
|
|
|
crypto_unregister_alg(&alg->base);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
|
|
|
|
|
2015-12-05 09:09:33 -07:00
|
|
|
int akcipher_register_instance(struct crypto_template *tmpl,
|
|
|
|
struct akcipher_instance *inst)
|
|
|
|
{
|
2020-01-02 21:04:40 -07:00
|
|
|
if (WARN_ON(!inst->free))
|
|
|
|
return -EINVAL;
|
2015-12-05 09:09:33 -07:00
|
|
|
akcipher_prepare_alg(&inst->alg);
|
|
|
|
return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(akcipher_register_instance);
|
|
|
|
|
2023-06-15 03:28:48 -07:00
|
|
|
int crypto_akcipher_sync_prep(struct crypto_akcipher_sync_data *data)
|
2023-06-15 03:28:46 -07:00
|
|
|
{
|
|
|
|
unsigned int reqsize = crypto_akcipher_reqsize(data->tfm);
|
|
|
|
struct akcipher_request *req;
|
|
|
|
struct scatterlist *sg;
|
2023-06-26 03:33:44 -07:00
|
|
|
unsigned int mlen;
|
2023-06-15 03:28:46 -07:00
|
|
|
unsigned int len;
|
|
|
|
u8 *buf;
|
|
|
|
|
2023-06-26 03:33:44 -07:00
|
|
|
if (data->dst)
|
|
|
|
mlen = max(data->slen, data->dlen);
|
|
|
|
else
|
|
|
|
mlen = data->slen + data->dlen;
|
|
|
|
|
2023-06-15 03:28:46 -07:00
|
|
|
len = sizeof(*req) + reqsize + mlen;
|
|
|
|
if (len < mlen)
|
|
|
|
return -EOVERFLOW;
|
|
|
|
|
|
|
|
req = kzalloc(len, GFP_KERNEL);
|
|
|
|
if (!req)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data->req = req;
|
2023-06-26 03:20:25 -07:00
|
|
|
akcipher_request_set_tfm(req, data->tfm);
|
2023-06-15 03:28:46 -07:00
|
|
|
|
|
|
|
buf = (u8 *)(req + 1) + reqsize;
|
|
|
|
data->buf = buf;
|
|
|
|
memcpy(buf, data->src, data->slen);
|
|
|
|
|
2023-06-26 03:33:44 -07:00
|
|
|
sg = &data->sg;
|
2023-06-15 03:28:46 -07:00
|
|
|
sg_init_one(sg, buf, mlen);
|
2023-06-26 03:33:44 -07:00
|
|
|
akcipher_request_set_crypt(req, sg, data->dst ? sg : NULL,
|
|
|
|
data->slen, data->dlen);
|
2023-06-15 03:28:46 -07:00
|
|
|
|
|
|
|
crypto_init_wait(&data->cwait);
|
|
|
|
akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
|
|
|
|
crypto_req_done, &data->cwait);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2023-06-15 03:28:48 -07:00
|
|
|
EXPORT_SYMBOL_GPL(crypto_akcipher_sync_prep);
|
2023-06-15 03:28:46 -07:00
|
|
|
|
2023-06-15 03:28:48 -07:00
|
|
|
int crypto_akcipher_sync_post(struct crypto_akcipher_sync_data *data, int err)
|
2023-06-15 03:28:46 -07:00
|
|
|
{
|
|
|
|
err = crypto_wait_req(err, &data->cwait);
|
2023-06-27 02:59:32 -07:00
|
|
|
if (data->dst)
|
|
|
|
memcpy(data->dst, data->buf, data->dlen);
|
2023-06-15 03:28:46 -07:00
|
|
|
data->dlen = data->req->dst_len;
|
|
|
|
kfree_sensitive(data->req);
|
|
|
|
return err;
|
|
|
|
}
|
2023-06-15 03:28:48 -07:00
|
|
|
EXPORT_SYMBOL_GPL(crypto_akcipher_sync_post);
|
2023-06-15 03:28:46 -07:00
|
|
|
|
|
|
|
int crypto_akcipher_sync_encrypt(struct crypto_akcipher *tfm,
|
|
|
|
const void *src, unsigned int slen,
|
|
|
|
void *dst, unsigned int dlen)
|
|
|
|
{
|
|
|
|
struct crypto_akcipher_sync_data data = {
|
|
|
|
.tfm = tfm,
|
|
|
|
.src = src,
|
|
|
|
.dst = dst,
|
|
|
|
.slen = slen,
|
|
|
|
.dlen = dlen,
|
|
|
|
};
|
|
|
|
|
|
|
|
return crypto_akcipher_sync_prep(&data) ?:
|
|
|
|
crypto_akcipher_sync_post(&data,
|
|
|
|
crypto_akcipher_encrypt(data.req));
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_akcipher_sync_encrypt);
|
|
|
|
|
|
|
|
int crypto_akcipher_sync_decrypt(struct crypto_akcipher *tfm,
|
|
|
|
const void *src, unsigned int slen,
|
|
|
|
void *dst, unsigned int dlen)
|
|
|
|
{
|
|
|
|
struct crypto_akcipher_sync_data data = {
|
|
|
|
.tfm = tfm,
|
|
|
|
.src = src,
|
|
|
|
.dst = dst,
|
|
|
|
.slen = slen,
|
|
|
|
.dlen = dlen,
|
|
|
|
};
|
|
|
|
|
|
|
|
return crypto_akcipher_sync_prep(&data) ?:
|
|
|
|
crypto_akcipher_sync_post(&data,
|
|
|
|
crypto_akcipher_decrypt(data.req)) ?:
|
|
|
|
data.dlen;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_akcipher_sync_decrypt);
|
|
|
|
|
2023-06-15 03:28:48 -07:00
|
|
|
static void crypto_exit_akcipher_ops_sig(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_akcipher **ctx = crypto_tfm_ctx(tfm);
|
|
|
|
|
|
|
|
crypto_free_akcipher(*ctx);
|
|
|
|
}
|
|
|
|
|
|
|
|
int crypto_init_akcipher_ops_sig(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_akcipher **ctx = crypto_tfm_ctx(tfm);
|
|
|
|
struct crypto_alg *calg = tfm->__crt_alg;
|
|
|
|
struct crypto_akcipher *akcipher;
|
|
|
|
|
|
|
|
if (!crypto_mod_get(calg))
|
|
|
|
return -EAGAIN;
|
|
|
|
|
|
|
|
akcipher = crypto_create_tfm(calg, &crypto_akcipher_type);
|
|
|
|
if (IS_ERR(akcipher)) {
|
|
|
|
crypto_mod_put(calg);
|
|
|
|
return PTR_ERR(akcipher);
|
|
|
|
}
|
|
|
|
|
|
|
|
*ctx = akcipher;
|
|
|
|
tfm->exit = crypto_exit_akcipher_ops_sig;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(crypto_init_akcipher_ops_sig);
|
|
|
|
|
2015-06-16 10:30:55 -07:00
|
|
|
MODULE_LICENSE("GPL");
|
2015-06-23 10:18:53 -07:00
|
|
|
MODULE_DESCRIPTION("Generic public key cipher type");
|