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Diffstat (limited to 'fs/ecryptfs/crypto.c')
-rw-r--r--fs/ecryptfs/crypto.c59
1 files changed, 31 insertions, 28 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 64026e53722a..ebd40f46ed4c 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -105,19 +105,7 @@ static int ecryptfs_calculate_md5(char *dst,
struct crypto_shash *tfm;
int rc = 0;
- mutex_lock(&crypt_stat->cs_hash_tfm_mutex);
tfm = crypt_stat->hash_tfm;
- if (!tfm) {
- tfm = crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0);
- if (IS_ERR(tfm)) {
- rc = PTR_ERR(tfm);
- ecryptfs_printk(KERN_ERR, "Error attempting to "
- "allocate crypto context; rc = [%d]\n",
- rc);
- goto out;
- }
- crypt_stat->hash_tfm = tfm;
- }
rc = ecryptfs_hash_digest(tfm, src, len, dst);
if (rc) {
printk(KERN_ERR
@@ -126,7 +114,6 @@ static int ecryptfs_calculate_md5(char *dst,
goto out;
}
out:
- mutex_unlock(&crypt_stat->cs_hash_tfm_mutex);
return rc;
}
@@ -207,16 +194,29 @@ out:
*
* Initialize the crypt_stat structure.
*/
-void
-ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat)
+int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat)
{
+ struct crypto_shash *tfm;
+ int rc;
+
+ tfm = crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0);
+ if (IS_ERR(tfm)) {
+ rc = PTR_ERR(tfm);
+ ecryptfs_printk(KERN_ERR, "Error attempting to "
+ "allocate crypto context; rc = [%d]\n",
+ rc);
+ return rc;
+ }
+
memset((void *)crypt_stat, 0, sizeof(struct ecryptfs_crypt_stat));
INIT_LIST_HEAD(&crypt_stat->keysig_list);
mutex_init(&crypt_stat->keysig_list_mutex);
mutex_init(&crypt_stat->cs_mutex);
mutex_init(&crypt_stat->cs_tfm_mutex);
- mutex_init(&crypt_stat->cs_hash_tfm_mutex);
+ crypt_stat->hash_tfm = tfm;
crypt_stat->flags |= ECRYPTFS_STRUCT_INITIALIZED;
+
+ return 0;
}
/**
@@ -286,7 +286,7 @@ int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
pg = virt_to_page(addr);
offset = offset_in_page(addr);
sg_set_page(&sg[i], pg, 0, offset);
- remainder_of_page = PAGE_CACHE_SIZE - offset;
+ remainder_of_page = PAGE_SIZE - offset;
if (size >= remainder_of_page) {
sg[i].length = remainder_of_page;
addr += remainder_of_page;
@@ -400,7 +400,7 @@ static loff_t lower_offset_for_page(struct ecryptfs_crypt_stat *crypt_stat,
struct page *page)
{
return ecryptfs_lower_header_size(crypt_stat) +
- ((loff_t)page->index << PAGE_CACHE_SHIFT);
+ ((loff_t)page->index << PAGE_SHIFT);
}
/**
@@ -428,7 +428,7 @@ static int crypt_extent(struct ecryptfs_crypt_stat *crypt_stat,
size_t extent_size = crypt_stat->extent_size;
int rc;
- extent_base = (((loff_t)page_index) * (PAGE_CACHE_SIZE / extent_size));
+ extent_base = (((loff_t)page_index) * (PAGE_SIZE / extent_size));
rc = ecryptfs_derive_iv(extent_iv, crypt_stat,
(extent_base + extent_offset));
if (rc) {
@@ -498,7 +498,7 @@ int ecryptfs_encrypt_page(struct page *page)
}
for (extent_offset = 0;
- extent_offset < (PAGE_CACHE_SIZE / crypt_stat->extent_size);
+ extent_offset < (PAGE_SIZE / crypt_stat->extent_size);
extent_offset++) {
rc = crypt_extent(crypt_stat, enc_extent_page, page,
extent_offset, ENCRYPT);
@@ -512,7 +512,7 @@ int ecryptfs_encrypt_page(struct page *page)
lower_offset = lower_offset_for_page(crypt_stat, page);
enc_extent_virt = kmap(enc_extent_page);
rc = ecryptfs_write_lower(ecryptfs_inode, enc_extent_virt, lower_offset,
- PAGE_CACHE_SIZE);
+ PAGE_SIZE);
kunmap(enc_extent_page);
if (rc < 0) {
ecryptfs_printk(KERN_ERR,
@@ -560,7 +560,7 @@ int ecryptfs_decrypt_page(struct page *page)
lower_offset = lower_offset_for_page(crypt_stat, page);
page_virt = kmap(page);
- rc = ecryptfs_read_lower(page_virt, lower_offset, PAGE_CACHE_SIZE,
+ rc = ecryptfs_read_lower(page_virt, lower_offset, PAGE_SIZE,
ecryptfs_inode);
kunmap(page);
if (rc < 0) {
@@ -571,7 +571,7 @@ int ecryptfs_decrypt_page(struct page *page)
}
for (extent_offset = 0;
- extent_offset < (PAGE_CACHE_SIZE / crypt_stat->extent_size);
+ extent_offset < (PAGE_SIZE / crypt_stat->extent_size);
extent_offset++) {
rc = crypt_extent(crypt_stat, page, page,
extent_offset, DECRYPT);
@@ -659,11 +659,11 @@ void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat)
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
crypt_stat->metadata_size = ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
else {
- if (PAGE_CACHE_SIZE <= ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE)
+ if (PAGE_SIZE <= ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE)
crypt_stat->metadata_size =
ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
else
- crypt_stat->metadata_size = PAGE_CACHE_SIZE;
+ crypt_stat->metadata_size = PAGE_SIZE;
}
}
@@ -1369,7 +1369,9 @@ int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode)
ssize_t size;
int rc = 0;
- size = ecryptfs_getxattr_lower(lower_dentry, ECRYPTFS_XATTR_NAME,
+ size = ecryptfs_getxattr_lower(lower_dentry,
+ ecryptfs_inode_to_lower(ecryptfs_inode),
+ ECRYPTFS_XATTR_NAME,
page_virt, ECRYPTFS_DEFAULT_EXTENT_SIZE);
if (size < 0) {
if (unlikely(ecryptfs_verbosity > 0))
@@ -1391,6 +1393,7 @@ int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
int rc;
rc = ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry),
+ ecryptfs_inode_to_lower(inode),
ECRYPTFS_XATTR_NAME, file_size,
ECRYPTFS_SIZE_AND_MARKER_BYTES);
if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
@@ -1442,7 +1445,7 @@ int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry)
ECRYPTFS_VALIDATE_HEADER_SIZE);
if (rc) {
/* metadata is not in the file header, so try xattrs */
- memset(page_virt, 0, PAGE_CACHE_SIZE);
+ memset(page_virt, 0, PAGE_SIZE);
rc = ecryptfs_read_xattr_region(page_virt, ecryptfs_inode);
if (rc) {
printk(KERN_DEBUG "Valid eCryptfs headers not found in "
@@ -1475,7 +1478,7 @@ int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry)
}
out:
if (page_virt) {
- memset(page_virt, 0, PAGE_CACHE_SIZE);
+ memset(page_virt, 0, PAGE_SIZE);
kmem_cache_free(ecryptfs_header_cache, page_virt);
}
return rc;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.