AetherDroid/android_kernel_samsung_on5xelte
1
0
Fork 0
mirror of https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git synced 2025-09-09 01:28:05 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fixed MTP to work with TWRP

Browse source
This commit is contained in:
awab228 2018-06-19 23:16:04 +02:00
commit f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

148
drivers/crypto/fmp/fmp_derive_iv.c Normal file
View file

@ -0,0 +1,148 @@
/*
* Exynos FMP derive iv for eCryptfs
*
* Copyright (C) 2014 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/crypto.h>
#include <linux/scatterlist.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/fs.h>
#define FMP_MAX_IV_BYTES 16
#define FMP_MAX_OFFSET_BYTES 16
#define DEFAULT_HASH "md5"
#define SHA256_HASH "sha256-fmp"
static DEFINE_SPINLOCK(fmp_tfm_lock);
int calculate_sha256(struct crypto_hash *hash_tfm, char *dst, char *src, int len)
{
int ret = -1;
unsigned long flag;
struct scatterlist sg;
struct hash_desc desc = {
.tfm = hash_tfm,
.flags = 0
};
spin_lock_irqsave(&fmp_tfm_lock, flag);
sg_init_one(&sg, (u8 *)src, len);
if (!desc.tfm) {
desc.tfm = crypto_alloc_hash(SHA256_HASH, 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(desc.tfm)) {
printk(KERN_ERR "%s: Error attemping to allocate crypto context\n", __func__);
goto out;
}
hash_tfm = desc.tfm;
}
ret = crypto_hash_init(&desc);
if (ret) {
printk(KERN_ERR
"%s: Error initializing crypto hash; ret = [%d]\n",
__func__, ret);
goto out;
}
ret = crypto_hash_update(&desc, &sg, len);
if (ret) {
printk(KERN_ERR
"%s: Error updating crypto hash; ret = [%d]\n",
__func__, ret);
goto out;
}
ret = crypto_hash_final(&desc, dst);
if (ret) {
printk(KERN_ERR
"%s: Error finalizing crypto hash; ret = [%d]\n",
__func__, ret);
goto out;
}
out:
spin_unlock_irqrestore(&fmp_tfm_lock, flag);
return ret;
}
int calculate_md5(struct crypto_hash *hash_tfm, char *dst, char *src, int len)
{
int ret = -1;
unsigned long flag;
struct scatterlist sg;
struct hash_desc desc = {
.tfm = hash_tfm,
.flags = 0
};
spin_lock_irqsave(&fmp_tfm_lock, flag);
sg_init_one(&sg, (u8 *)src, len);
if (!desc.tfm) {
desc.tfm = crypto_alloc_hash(DEFAULT_HASH, 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(desc.tfm)) {
printk(KERN_ERR "%s: Error attemping to allocate crypto context\n", __func__);
goto out;
}
hash_tfm = desc.tfm;
}
ret = crypto_hash_init(&desc);
if (ret) {
printk(KERN_ERR
"%s: Error initializing crypto hash; ret = [%d]\n",
__func__, ret);
goto out;
}
ret = crypto_hash_update(&desc, &sg, len);
if (ret) {
printk(KERN_ERR
"%s: Error updating crypto hash; ret = [%d]\n",
__func__, ret);
goto out;
}
ret = crypto_hash_final(&desc, dst);
if (ret) {
printk(KERN_ERR
"%s: Error finalizing crypto hash; ret = [%d]\n",
__func__, ret);
goto out;
}
out:
spin_unlock_irqrestore(&fmp_tfm_lock, flag);
return ret;
}
int file_enc_derive_iv(struct address_space *mapping, loff_t offset, char *extent_iv)
{
char src[FMP_MAX_IV_BYTES + FMP_MAX_OFFSET_BYTES];
int ret;
memcpy(src, mapping->iv, FMP_MAX_IV_BYTES);
memset(src + FMP_MAX_IV_BYTES, 0, FMP_MAX_OFFSET_BYTES);
snprintf(src + FMP_MAX_IV_BYTES, FMP_MAX_OFFSET_BYTES, "%lld", offset);
#ifdef CONFIG_CRYPTO_FIPS
if (mapping->cc_enable)
ret = calculate_sha256(mapping->hash_tfm, extent_iv, src, FMP_MAX_IV_BYTES + FMP_MAX_OFFSET_BYTES);
else
#endif
ret = calculate_md5(mapping->hash_tfm, extent_iv, src, FMP_MAX_IV_BYTES + FMP_MAX_OFFSET_BYTES);
if (ret) {
printk(KERN_ERR "%s: Error attempting to compute generating IV for a page; ret = [%d]\n", __func__, ret);
goto out;
}
out:
return ret;
}