mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 01:08:03 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
362
crypto/chainiv.c
Normal file
362
crypto/chainiv.c
Normal file
|
|
@ -0,0 +1,362 @@
|
|||
/*
|
||||
* chainiv: Chain IV Generator
|
||||
*
|
||||
* Generate IVs simply be using the last block of the previous encryption.
|
||||
* This is mainly useful for CBC with a synchronous algorithm.
|
||||
*
|
||||
* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
|
||||
*
|
||||
* 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 <crypto/internal/skcipher.h>
|
||||
#include <crypto/rng.h>
|
||||
#include <crypto/crypto_wq.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/workqueue.h>
|
||||
|
||||
enum {
|
||||
CHAINIV_STATE_INUSE = 0,
|
||||
};
|
||||
|
||||
struct chainiv_ctx {
|
||||
spinlock_t lock;
|
||||
char iv[];
|
||||
};
|
||||
|
||||
struct async_chainiv_ctx {
|
||||
unsigned long state;
|
||||
|
||||
spinlock_t lock;
|
||||
int err;
|
||||
|
||||
struct crypto_queue queue;
|
||||
struct work_struct postponed;
|
||||
|
||||
char iv[];
|
||||
};
|
||||
|
||||
static int chainiv_givencrypt(struct skcipher_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
|
||||
struct chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
|
||||
struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
|
||||
unsigned int ivsize;
|
||||
int err;
|
||||
|
||||
ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv));
|
||||
ablkcipher_request_set_callback(subreq, req->creq.base.flags &
|
||||
~CRYPTO_TFM_REQ_MAY_SLEEP,
|
||||
req->creq.base.complete,
|
||||
req->creq.base.data);
|
||||
ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst,
|
||||
req->creq.nbytes, req->creq.info);
|
||||
|
||||
spin_lock_bh(&ctx->lock);
|
||||
|
||||
ivsize = crypto_ablkcipher_ivsize(geniv);
|
||||
|
||||
memcpy(req->giv, ctx->iv, ivsize);
|
||||
memcpy(subreq->info, ctx->iv, ivsize);
|
||||
|
||||
err = crypto_ablkcipher_encrypt(subreq);
|
||||
if (err)
|
||||
goto unlock;
|
||||
|
||||
memcpy(ctx->iv, subreq->info, ivsize);
|
||||
|
||||
unlock:
|
||||
spin_unlock_bh(&ctx->lock);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int chainiv_givencrypt_first(struct skcipher_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
|
||||
struct chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
|
||||
int err = 0;
|
||||
|
||||
spin_lock_bh(&ctx->lock);
|
||||
if (crypto_ablkcipher_crt(geniv)->givencrypt !=
|
||||
chainiv_givencrypt_first)
|
||||
goto unlock;
|
||||
|
||||
crypto_ablkcipher_crt(geniv)->givencrypt = chainiv_givencrypt;
|
||||
err = crypto_rng_get_bytes(crypto_default_rng, ctx->iv,
|
||||
crypto_ablkcipher_ivsize(geniv));
|
||||
|
||||
unlock:
|
||||
spin_unlock_bh(&ctx->lock);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return chainiv_givencrypt(req);
|
||||
}
|
||||
|
||||
static int chainiv_init_common(struct crypto_tfm *tfm)
|
||||
{
|
||||
tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request);
|
||||
|
||||
return skcipher_geniv_init(tfm);
|
||||
}
|
||||
|
||||
static int chainiv_init(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct chainiv_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
spin_lock_init(&ctx->lock);
|
||||
|
||||
return chainiv_init_common(tfm);
|
||||
}
|
||||
|
||||
static int async_chainiv_schedule_work(struct async_chainiv_ctx *ctx)
|
||||
{
|
||||
int queued;
|
||||
int err = ctx->err;
|
||||
|
||||
if (!ctx->queue.qlen) {
|
||||
smp_mb__before_atomic();
|
||||
clear_bit(CHAINIV_STATE_INUSE, &ctx->state);
|
||||
|
||||
if (!ctx->queue.qlen ||
|
||||
test_and_set_bit(CHAINIV_STATE_INUSE, &ctx->state))
|
||||
goto out;
|
||||
}
|
||||
|
||||
queued = queue_work(kcrypto_wq, &ctx->postponed);
|
||||
BUG_ON(!queued);
|
||||
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int async_chainiv_postpone_request(struct skcipher_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
|
||||
struct async_chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
|
||||
int err;
|
||||
|
||||
spin_lock_bh(&ctx->lock);
|
||||
err = skcipher_enqueue_givcrypt(&ctx->queue, req);
|
||||
spin_unlock_bh(&ctx->lock);
|
||||
|
||||
if (test_and_set_bit(CHAINIV_STATE_INUSE, &ctx->state))
|
||||
return err;
|
||||
|
||||
ctx->err = err;
|
||||
return async_chainiv_schedule_work(ctx);
|
||||
}
|
||||
|
||||
static int async_chainiv_givencrypt_tail(struct skcipher_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
|
||||
struct async_chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
|
||||
struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
|
||||
unsigned int ivsize = crypto_ablkcipher_ivsize(geniv);
|
||||
|
||||
memcpy(req->giv, ctx->iv, ivsize);
|
||||
memcpy(subreq->info, ctx->iv, ivsize);
|
||||
|
||||
ctx->err = crypto_ablkcipher_encrypt(subreq);
|
||||
if (ctx->err)
|
||||
goto out;
|
||||
|
||||
memcpy(ctx->iv, subreq->info, ivsize);
|
||||
|
||||
out:
|
||||
return async_chainiv_schedule_work(ctx);
|
||||
}
|
||||
|
||||
static int async_chainiv_givencrypt(struct skcipher_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
|
||||
struct async_chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
|
||||
struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
|
||||
|
||||
ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv));
|
||||
ablkcipher_request_set_callback(subreq, req->creq.base.flags,
|
||||
req->creq.base.complete,
|
||||
req->creq.base.data);
|
||||
ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst,
|
||||
req->creq.nbytes, req->creq.info);
|
||||
|
||||
if (test_and_set_bit(CHAINIV_STATE_INUSE, &ctx->state))
|
||||
goto postpone;
|
||||
|
||||
if (ctx->queue.qlen) {
|
||||
clear_bit(CHAINIV_STATE_INUSE, &ctx->state);
|
||||
goto postpone;
|
||||
}
|
||||
|
||||
return async_chainiv_givencrypt_tail(req);
|
||||
|
||||
postpone:
|
||||
return async_chainiv_postpone_request(req);
|
||||
}
|
||||
|
||||
static int async_chainiv_givencrypt_first(struct skcipher_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
|
||||
struct async_chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
|
||||
int err = 0;
|
||||
|
||||
if (test_and_set_bit(CHAINIV_STATE_INUSE, &ctx->state))
|
||||
goto out;
|
||||
|
||||
if (crypto_ablkcipher_crt(geniv)->givencrypt !=
|
||||
async_chainiv_givencrypt_first)
|
||||
goto unlock;
|
||||
|
||||
crypto_ablkcipher_crt(geniv)->givencrypt = async_chainiv_givencrypt;
|
||||
err = crypto_rng_get_bytes(crypto_default_rng, ctx->iv,
|
||||
crypto_ablkcipher_ivsize(geniv));
|
||||
|
||||
unlock:
|
||||
clear_bit(CHAINIV_STATE_INUSE, &ctx->state);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
out:
|
||||
return async_chainiv_givencrypt(req);
|
||||
}
|
||||
|
||||
static void async_chainiv_do_postponed(struct work_struct *work)
|
||||
{
|
||||
struct async_chainiv_ctx *ctx = container_of(work,
|
||||
struct async_chainiv_ctx,
|
||||
postponed);
|
||||
struct skcipher_givcrypt_request *req;
|
||||
struct ablkcipher_request *subreq;
|
||||
int err;
|
||||
|
||||
/* Only handle one request at a time to avoid hogging keventd. */
|
||||
spin_lock_bh(&ctx->lock);
|
||||
req = skcipher_dequeue_givcrypt(&ctx->queue);
|
||||
spin_unlock_bh(&ctx->lock);
|
||||
|
||||
if (!req) {
|
||||
async_chainiv_schedule_work(ctx);
|
||||
return;
|
||||
}
|
||||
|
||||
subreq = skcipher_givcrypt_reqctx(req);
|
||||
subreq->base.flags |= CRYPTO_TFM_REQ_MAY_SLEEP;
|
||||
|
||||
err = async_chainiv_givencrypt_tail(req);
|
||||
|
||||
local_bh_disable();
|
||||
skcipher_givcrypt_complete(req, err);
|
||||
local_bh_enable();
|
||||
}
|
||||
|
||||
static int async_chainiv_init(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct async_chainiv_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
spin_lock_init(&ctx->lock);
|
||||
|
||||
crypto_init_queue(&ctx->queue, 100);
|
||||
INIT_WORK(&ctx->postponed, async_chainiv_do_postponed);
|
||||
|
||||
return chainiv_init_common(tfm);
|
||||
}
|
||||
|
||||
static void async_chainiv_exit(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct async_chainiv_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
BUG_ON(test_bit(CHAINIV_STATE_INUSE, &ctx->state) || ctx->queue.qlen);
|
||||
|
||||
skcipher_geniv_exit(tfm);
|
||||
}
|
||||
|
||||
static struct crypto_template chainiv_tmpl;
|
||||
|
||||
static struct crypto_instance *chainiv_alloc(struct rtattr **tb)
|
||||
{
|
||||
struct crypto_attr_type *algt;
|
||||
struct crypto_instance *inst;
|
||||
int err;
|
||||
|
||||
algt = crypto_get_attr_type(tb);
|
||||
if (IS_ERR(algt))
|
||||
return ERR_CAST(algt);
|
||||
|
||||
err = crypto_get_default_rng();
|
||||
if (err)
|
||||
return ERR_PTR(err);
|
||||
|
||||
inst = skcipher_geniv_alloc(&chainiv_tmpl, tb, 0, 0);
|
||||
if (IS_ERR(inst))
|
||||
goto put_rng;
|
||||
|
||||
inst->alg.cra_ablkcipher.givencrypt = chainiv_givencrypt_first;
|
||||
|
||||
inst->alg.cra_init = chainiv_init;
|
||||
inst->alg.cra_exit = skcipher_geniv_exit;
|
||||
|
||||
inst->alg.cra_ctxsize = sizeof(struct chainiv_ctx);
|
||||
|
||||
if (!crypto_requires_sync(algt->type, algt->mask)) {
|
||||
inst->alg.cra_flags |= CRYPTO_ALG_ASYNC;
|
||||
|
||||
inst->alg.cra_ablkcipher.givencrypt =
|
||||
async_chainiv_givencrypt_first;
|
||||
|
||||
inst->alg.cra_init = async_chainiv_init;
|
||||
inst->alg.cra_exit = async_chainiv_exit;
|
||||
|
||||
inst->alg.cra_ctxsize = sizeof(struct async_chainiv_ctx);
|
||||
}
|
||||
|
||||
inst->alg.cra_ctxsize += inst->alg.cra_ablkcipher.ivsize;
|
||||
|
||||
out:
|
||||
return inst;
|
||||
|
||||
put_rng:
|
||||
crypto_put_default_rng();
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void chainiv_free(struct crypto_instance *inst)
|
||||
{
|
||||
skcipher_geniv_free(inst);
|
||||
crypto_put_default_rng();
|
||||
}
|
||||
|
||||
static struct crypto_template chainiv_tmpl = {
|
||||
.name = "chainiv",
|
||||
.alloc = chainiv_alloc,
|
||||
.free = chainiv_free,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int __init chainiv_module_init(void)
|
||||
{
|
||||
return crypto_register_template(&chainiv_tmpl);
|
||||
}
|
||||
|
||||
static void chainiv_module_exit(void)
|
||||
{
|
||||
crypto_unregister_template(&chainiv_tmpl);
|
||||
}
|
||||
|
||||
module_init(chainiv_module_init);
|
||||
module_exit(chainiv_module_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Chain IV Generator");
|
||||
MODULE_ALIAS_CRYPTO("chainiv");
|
||||
Loading…
Add table
Add a link
Reference in a new issue