crypto_free_blkcipher(crypt_stat->tfm);
if (crypt_stat->hash_tfm)
crypto_free_hash(crypt_stat->hash_tfm);
- mutex_lock(&crypt_stat->keysig_list_mutex);
list_for_each_entry_safe(key_sig, key_sig_tmp,
&crypt_stat->keysig_list, crypt_stat_list) {
list_del(&key_sig->crypt_stat_list);
kmem_cache_free(ecryptfs_key_sig_cache, key_sig);
}
- mutex_unlock(&crypt_stat->keysig_list_mutex);
memset(crypt_stat, 0, sizeof(struct ecryptfs_crypt_stat));
}
ecryptfs_inode = page->mapping->host;
crypt_stat =
&(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat);
- if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
- rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page,
- 0, PAGE_CACHE_SIZE);
- if (rc)
- printk(KERN_ERR "%s: Error attempting to copy "
- "page at index [%ld]\n", __func__,
- page->index);
- goto out;
- }
+ BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));
enc_extent_page = alloc_page(GFP_USER);
if (!enc_extent_page) {
rc = -ENOMEM;
+ extent_offset), crypt_stat);
rc = ecryptfs_write_lower(ecryptfs_inode, enc_extent_virt,
offset, crypt_stat->extent_size);
- if (rc) {
+ if (rc < 0) {
ecryptfs_printk(KERN_ERR, "Error attempting "
"to write lower page; rc = [%d]"
"\n", rc);
goto out;
}
}
+ rc = 0;
out:
if (enc_extent_page) {
kunmap(enc_extent_page);
ecryptfs_inode = page->mapping->host;
crypt_stat =
&(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat);
- if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
- rc = ecryptfs_read_lower_page_segment(page, page->index, 0,
- PAGE_CACHE_SIZE,
- ecryptfs_inode);
- if (rc)
- printk(KERN_ERR "%s: Error attempting to copy "
- "page at index [%ld]\n", __func__,
- page->index);
- goto out;
- }
+ BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));
enc_extent_page = alloc_page(GFP_USER);
if (!enc_extent_page) {
rc = -ENOMEM;
rc = ecryptfs_read_lower(enc_extent_virt, offset,
crypt_stat->extent_size,
ecryptfs_inode);
- if (rc) {
+ if (rc < 0) {
ecryptfs_printk(KERN_ERR, "Error attempting "
"to read lower page; rc = [%d]"
"\n", rc);
kfree(full_alg_name);
if (IS_ERR(crypt_stat->tfm)) {
rc = PTR_ERR(crypt_stat->tfm);
+ crypt_stat->tfm = NULL;
ecryptfs_printk(KERN_ERR, "cryptfs: init_crypt_ctx(): "
"Error initializing cipher [%s]\n",
crypt_stat->cipher);
struct ecryptfs_global_auth_tok *global_auth_tok;
int rc = 0;
+ mutex_lock(&crypt_stat->keysig_list_mutex);
mutex_lock(&mount_crypt_stat->global_auth_tok_list_mutex);
+
list_for_each_entry(global_auth_tok,
&mount_crypt_stat->global_auth_tok_list,
mount_crypt_stat_list) {
+ if (global_auth_tok->flags & ECRYPTFS_AUTH_TOK_FNEK)
+ continue;
rc = ecryptfs_add_keysig(crypt_stat, global_auth_tok->sig);
if (rc) {
printk(KERN_ERR "Error adding keysig; rc = [%d]\n", rc);
- mutex_unlock(
- &mount_crypt_stat->global_auth_tok_list_mutex);
goto out;
}
}
- mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex);
+
out:
+ mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex);
+ mutex_unlock(&crypt_stat->keysig_list_mutex);
return rc;
}
crypt_stat->extent_size = ECRYPTFS_DEFAULT_EXTENT_SIZE;
rc = ecryptfs_read_lower(data, 0, crypt_stat->extent_size,
ecryptfs_inode);
- if (rc) {
+ if (rc < 0) {
printk(KERN_ERR "%s: Error reading header region; rc = [%d]\n",
__func__, rc);
goto out;
}
if (!contains_ecryptfs_marker(data + ECRYPTFS_FILE_SIZE_BYTES)) {
rc = -EINVAL;
- }
+ } else
+ rc = 0;
out:
return rc;
}
}
static int
-ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
- struct dentry *ecryptfs_dentry,
- char *virt)
+ecryptfs_write_metadata_to_contents(struct dentry *ecryptfs_dentry,
+ char *virt, size_t virt_len)
{
int rc;
rc = ecryptfs_write_lower(ecryptfs_dentry->d_inode, virt,
- 0, crypt_stat->num_header_bytes_at_front);
- if (rc)
+ 0, virt_len);
+ if (rc < 0)
printk(KERN_ERR "%s: Error attempting to write header "
- "information to lower file; rc = [%d]\n", __func__,
- rc);
+ "information to lower file; rc = [%d]\n", __func__, rc);
+ else
+ rc = 0;
return rc;
}
static int
ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
- struct ecryptfs_crypt_stat *crypt_stat,
char *page_virt, size_t size)
{
int rc;
return rc;
}
+static unsigned long ecryptfs_get_zeroed_pages(gfp_t gfp_mask,
+ unsigned int order)
+{
+ struct page *page;
+
+ page = alloc_pages(gfp_mask | __GFP_ZERO, order);
+ if (page)
+ return (unsigned long) page_address(page);
+ return 0;
+}
+
/**
* ecryptfs_write_metadata
* @ecryptfs_dentry: The eCryptfs dentry
{
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat;
+ unsigned int order;
char *virt;
+ size_t virt_len;
size_t size = 0;
int rc = 0;
rc = -EINVAL;
goto out;
}
+ virt_len = crypt_stat->num_header_bytes_at_front;
+ order = get_order(virt_len);
/* Released in this function */
- virt = (char *)get_zeroed_page(GFP_KERNEL);
+ virt = (char *)ecryptfs_get_zeroed_pages(GFP_KERNEL, order);
if (!virt) {
printk(KERN_ERR "%s: Out of memory\n", __func__);
rc = -ENOMEM;
goto out;
}
- rc = ecryptfs_write_headers_virt(virt, PAGE_CACHE_SIZE, &size,
- crypt_stat, ecryptfs_dentry);
+ rc = ecryptfs_write_headers_virt(virt, virt_len, &size, crypt_stat,
+ ecryptfs_dentry);
if (unlikely(rc)) {
printk(KERN_ERR "%s: Error whilst writing headers; rc = [%d]\n",
__func__, rc);
goto out_free;
}
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
- rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry,
- crypt_stat, virt, size);
+ rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt,
+ size);
else
- rc = ecryptfs_write_metadata_to_contents(crypt_stat,
- ecryptfs_dentry, virt);
+ rc = ecryptfs_write_metadata_to_contents(ecryptfs_dentry, virt,
+ virt_len);
if (rc) {
printk(KERN_ERR "%s: Error writing metadata out to lower file; "
"rc = [%d]\n", __func__, rc);
goto out_free;
}
out_free:
- free_page((unsigned long)virt);
+ free_pages((unsigned long)virt, order);
out:
return rc;
}
}
rc = ecryptfs_read_lower(page_virt, 0, crypt_stat->extent_size,
ecryptfs_inode);
- if (!rc)
+ if (rc >= 0)
rc = ecryptfs_read_headers_virt(page_virt, crypt_stat,
ecryptfs_dentry,
ECRYPTFS_VALIDATE_HEADER_SIZE);
kmalloc(filename->encrypted_filename_size, GFP_KERNEL);
if (!filename->encrypted_filename) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
- "to kmalloc [%Zd] bytes\n", __func__,
+ "to kmalloc [%zd] bytes\n", __func__,
filename->encrypted_filename_size);
rc = -ENOMEM;
goto out;
} else {
printk(KERN_ERR "%s: No support for requested filename "
"encryption method in this release\n", __func__);
- rc = -ENOTSUPP;
+ rc = -EOPNOTSUPP;
goto out;
}
out:
{
int rc = 0;
- (*copied_name) = kmalloc((name_size + 2), GFP_KERNEL);
+ (*copied_name) = kmalloc((name_size + 1), GFP_KERNEL);
if (!(*copied_name)) {
rc = -ENOMEM;
goto out;
* in printing out the
* string in debug
* messages */
- (*copied_name_size) = (name_size + 1);
+ (*copied_name_size) = name_size;
out:
return rc;
}
*key_tfm = NULL;
if (*key_size > ECRYPTFS_MAX_KEY_BYTES) {
rc = -EINVAL;
- printk(KERN_ERR "Requested key size is [%Zd] bytes; maximum "
+ printk(KERN_ERR "Requested key size is [%zd] bytes; maximum "
"allowable is [%d]\n", *key_size, ECRYPTFS_MAX_KEY_BYTES);
goto out;
}
if (IS_ERR(*key_tfm)) {
rc = PTR_ERR(*key_tfm);
printk(KERN_ERR "Unable to allocate crypto cipher with name "
- "[%s]; rc = [%d]\n", cipher_name, rc);
+ "[%s]; rc = [%d]\n", full_alg_name, rc);
goto out;
}
crypto_blkcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY);
get_random_bytes(dummy_key, *key_size);
rc = crypto_blkcipher_setkey(*key_tfm, dummy_key, *key_size);
if (rc) {
- printk(KERN_ERR "Error attempting to set key of size [%Zd] for "
- "cipher [%s]; rc = [%d]\n", *key_size, cipher_name, rc);
+ printk(KERN_ERR "Error attempting to set key of size [%zd] for "
+ "cipher [%s]; rc = [%d]\n", *key_size, full_alg_name,
+ rc);
rc = -EINVAL;
goto out;
}
/* We could either offset on every reverse map or just pad some 0x00's
* at the front here */
-static unsigned char filename_rev_map[] = {
+static const unsigned char filename_rev_map[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 7 */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 15 */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 23 */
return;
}
-int ecryptfs_decode_from_filename(unsigned char *dst, size_t *dst_size,
- const unsigned char *src, size_t src_size)
+/**
+ * ecryptfs_decode_from_filename
+ * @dst: If NULL, this function only sets @dst_size and returns. If
+ * non-NULL, this function decodes the encoded octets in @src
+ * into the memory that @dst points to.
+ * @dst_size: Set to the size of the decoded string.
+ * @src: The encoded set of octets to decode.
+ * @src_size: The size of the encoded set of octets to decode.
+ */
+static void
+ecryptfs_decode_from_filename(unsigned char *dst, size_t *dst_size,
+ const unsigned char *src, size_t src_size)
{
u8 current_bit_offset = 0;
size_t src_byte_offset = 0;
size_t dst_byte_offset = 0;
- int rc = 0;
if (dst == NULL) {
- /* Not exact; conservatively long */
+ /* Not exact; conservatively long. Every block of 4
+ * encoded characters decodes into a block of 3
+ * decoded characters. This segment of code provides
+ * the caller with the maximum amount of allocated
+ * space that @dst will need to point to in a
+ * subsequent call. */
(*dst_size) = (((src_size + 1) * 3) / 4);
goto out;
}
}
(*dst_size) = dst_byte_offset;
out:
- return rc;
+ return;
}
/**
filename = kzalloc(sizeof(*filename), GFP_KERNEL);
if (!filename) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
- "to kzalloc [%d] bytes\n", __func__,
+ "to kzalloc [%zd] bytes\n", __func__,
sizeof(*filename));
rc = -ENOMEM;
goto out;
(*encoded_name) = kmalloc((*encoded_name_size) + 1, GFP_KERNEL);
if (!(*encoded_name)) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
- "to kzalloc [%d] bytes\n", __func__,
+ "to kzalloc [%zd] bytes\n", __func__,
(*encoded_name_size));
rc = -ENOMEM;
kfree(filename->encrypted_filename);
(*encoded_name)[(*encoded_name_size)] = '\0';
(*encoded_name_size)++;
} else {
- rc = -ENOTSUPP;
+ rc = -EOPNOTSUPP;
}
if (rc) {
printk(KERN_ERR "%s: Error attempting to encode "
struct dentry *ecryptfs_dir_dentry,
const char *name, size_t name_size)
{
+ struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
+ &ecryptfs_superblock_to_private(
+ ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
char *decoded_name;
size_t decoded_name_size;
size_t packet_size;
int rc = 0;
- if ((name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
+ if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+ && !(mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED)
+ && (name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
&& (strncmp(name, ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX,
ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE) == 0)) {
- struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
- &ecryptfs_superblock_to_private(
- ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
const char *orig_name = name;
size_t orig_name_size = name_size;
name += ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE;
name_size -= ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE;
- rc = ecryptfs_decode_from_filename(NULL, &decoded_name_size,
- name, name_size);
- if (rc) {
- printk(KERN_ERR "%s: Error attempting to decode "
- "filename; rc = [%d]\n", __func__, rc);
- rc = ecryptfs_copy_filename(plaintext_name,
- plaintext_name_size,
- orig_name, orig_name_size);
- goto out;
- }
+ ecryptfs_decode_from_filename(NULL, &decoded_name_size,
+ name, name_size);
decoded_name = kmalloc(decoded_name_size, GFP_KERNEL);
if (!decoded_name) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
- "to kmalloc [%Zd] bytes\n", __func__,
+ "to kmalloc [%zd] bytes\n", __func__,
decoded_name_size);
rc = -ENOMEM;
goto out;
}
- rc = ecryptfs_decode_from_filename(decoded_name,
- &decoded_name_size,
- name, name_size);
- if (rc) {
- printk(KERN_ERR "%s: Error attempting to decode "
- "filename; rc = [%d]\n", __func__, rc);
- rc = ecryptfs_copy_filename(plaintext_name,
- plaintext_name_size,
- orig_name, orig_name_size);
- goto out_free;
- }
+ ecryptfs_decode_from_filename(decoded_name, &decoded_name_size,
+ name, name_size);
rc = ecryptfs_parse_tag_70_packet(plaintext_name,
plaintext_name_size,
&packet_size,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff