(unsigned long long)(extent_base + extent_offset), rc);
goto out;
}
- if (unlikely(ecryptfs_verbosity > 0)) {
- ecryptfs_printk(KERN_DEBUG, "Encrypting extent "
- "with iv:\n");
- ecryptfs_dump_hex(extent_iv, crypt_stat->iv_bytes);
- ecryptfs_printk(KERN_DEBUG, "First 8 bytes before "
- "encryption:\n");
- ecryptfs_dump_hex((char *)
- (page_address(page)
- + (extent_offset * crypt_stat->extent_size)),
- 8);
- }
rc = ecryptfs_encrypt_page_offset(crypt_stat, enc_extent_page, 0,
page, (extent_offset
* crypt_stat->extent_size),
goto out;
}
rc = 0;
- if (unlikely(ecryptfs_verbosity > 0)) {
- ecryptfs_printk(KERN_DEBUG, "Encrypt extent [0x%.16llx]; "
- "rc = [%d]\n",
- (unsigned long long)(extent_base + extent_offset), rc);
- ecryptfs_printk(KERN_DEBUG, "First 8 bytes after "
- "encryption:\n");
- ecryptfs_dump_hex((char *)(page_address(enc_extent_page)), 8);
- }
out:
return rc;
}
(unsigned long long)(extent_base + extent_offset), rc);
goto out;
}
- if (unlikely(ecryptfs_verbosity > 0)) {
- ecryptfs_printk(KERN_DEBUG, "Decrypting extent "
- "with iv:\n");
- ecryptfs_dump_hex(extent_iv, crypt_stat->iv_bytes);
- ecryptfs_printk(KERN_DEBUG, "First 8 bytes before "
- "decryption:\n");
- ecryptfs_dump_hex((char *)
- (page_address(enc_extent_page)
- + (extent_offset * crypt_stat->extent_size)),
- 8);
- }
rc = ecryptfs_decrypt_page_offset(crypt_stat, page,
(extent_offset
* crypt_stat->extent_size),
goto out;
}
rc = 0;
- if (unlikely(ecryptfs_verbosity > 0)) {
- ecryptfs_printk(KERN_DEBUG, "Decrypt extent [0x%.16llx]; "
- "rc = [%d]\n",
- (unsigned long long)(extent_base + extent_offset), rc);
- ecryptfs_printk(KERN_DEBUG, "First 8 bytes after "
- "decryption:\n");
- ecryptfs_dump_hex((char *)(page_address(page)
- + (extent_offset
- * crypt_stat->extent_size)), 8);
- }
out:
return rc;
}
}
/**
- * contains_ecryptfs_marker - check for the ecryptfs marker
+ * ecryptfs_validate_marker - check for the ecryptfs marker
* @data: The data block in which to check
*
- * Returns one if marker found; zero if not found
+ * Returns zero if marker found; -EINVAL if not found
*/
-static int contains_ecryptfs_marker(char *data)
+static int ecryptfs_validate_marker(char *data)
{
u32 m_1, m_2;
m_1 = get_unaligned_be32(data);
m_2 = get_unaligned_be32(data + 4);
if ((m_1 ^ MAGIC_ECRYPTFS_MARKER) == m_2)
- return 1;
+ return 0;
ecryptfs_printk(KERN_DEBUG, "m_1 = [0x%.8x]; m_2 = [0x%.8x]; "
"MAGIC_ECRYPTFS_MARKER = [0x%.8x]\n", m_1, m_2,
MAGIC_ECRYPTFS_MARKER);
ecryptfs_printk(KERN_DEBUG, "(m_1 ^ MAGIC_ECRYPTFS_MARKER) = "
"[0x%.8x]\n", (m_1 ^ MAGIC_ECRYPTFS_MARKER));
- return 0;
+ return -EINVAL;
}
struct ecryptfs_flag_map_elem {
return rc;
}
-int ecryptfs_read_and_validate_header_region(char *data,
- struct inode *ecryptfs_inode)
+int ecryptfs_read_and_validate_header_region(struct inode *inode)
{
- struct ecryptfs_crypt_stat *crypt_stat =
- &(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat);
+ u8 file_size[ECRYPTFS_SIZE_AND_MARKER_BYTES];
+ u8 *marker = file_size + ECRYPTFS_FILE_SIZE_BYTES;
int rc;
- if (crypt_stat->extent_size == 0)
- crypt_stat->extent_size = ECRYPTFS_DEFAULT_EXTENT_SIZE;
- rc = ecryptfs_read_lower(data, 0, crypt_stat->extent_size,
- ecryptfs_inode);
- 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:
+ rc = ecryptfs_read_lower(file_size, 0, ECRYPTFS_SIZE_AND_MARKER_BYTES,
+ inode);
+ if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
+ return rc >= 0 ? -EINVAL : rc;
+ rc = ecryptfs_validate_marker(marker);
+ if (!rc)
+ ecryptfs_i_size_init(file_size, inode);
return rc;
}
(*written) = 6;
}
-struct kmem_cache *ecryptfs_header_cache_1;
-struct kmem_cache *ecryptfs_header_cache_2;
+struct kmem_cache *ecryptfs_header_cache;
/**
* ecryptfs_write_headers_virt
crypt_stat->mount_crypt_stat = &ecryptfs_superblock_to_private(
ecryptfs_dentry->d_sb)->mount_crypt_stat;
offset = ECRYPTFS_FILE_SIZE_BYTES;
- rc = contains_ecryptfs_marker(page_virt + offset);
- if (rc == 0) {
- rc = -EINVAL;
+ rc = ecryptfs_validate_marker(page_virt + offset);
+ if (rc)
goto out;
- }
if (!(crypt_stat->flags & ECRYPTFS_I_SIZE_INITIALIZED))
ecryptfs_i_size_init(page_virt, ecryptfs_dentry->d_inode);
offset += MAGIC_ECRYPTFS_MARKER_SIZE_BYTES;
return rc;
}
-int ecryptfs_read_and_validate_xattr_region(char *page_virt,
- struct dentry *ecryptfs_dentry)
+int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
+ struct inode *inode)
{
+ u8 file_size[ECRYPTFS_SIZE_AND_MARKER_BYTES];
+ u8 *marker = file_size + ECRYPTFS_FILE_SIZE_BYTES;
int rc;
- rc = ecryptfs_read_xattr_region(page_virt, ecryptfs_dentry->d_inode);
- if (rc)
- goto out;
- if (!contains_ecryptfs_marker(page_virt + ECRYPTFS_FILE_SIZE_BYTES)) {
- printk(KERN_WARNING "Valid data found in [%s] xattr, but "
- "the marker is invalid\n", ECRYPTFS_XATTR_NAME);
- rc = -EINVAL;
- }
-out:
+ rc = ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry),
+ ECRYPTFS_XATTR_NAME, file_size,
+ ECRYPTFS_SIZE_AND_MARKER_BYTES);
+ if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
+ return rc >= 0 ? -EINVAL : rc;
+ rc = ecryptfs_validate_marker(marker);
+ if (!rc)
+ ecryptfs_i_size_init(file_size, inode);
return rc;
}
ecryptfs_copy_mount_wide_flags_to_inode_flags(crypt_stat,
mount_crypt_stat);
/* Read the first page from the underlying file */
- page_virt = kmem_cache_alloc(ecryptfs_header_cache_1, GFP_USER);
+ page_virt = kmem_cache_alloc(ecryptfs_header_cache, GFP_USER);
if (!page_virt) {
rc = -ENOMEM;
printk(KERN_ERR "%s: Unable to allocate page_virt\n",
rc = ecryptfs_read_xattr_region(page_virt, ecryptfs_inode);
if (rc) {
printk(KERN_DEBUG "Valid eCryptfs headers not found in "
- "file header region or xattr region\n");
+ "file header region or xattr region, inode %lu\n",
+ ecryptfs_inode->i_ino);
rc = -EINVAL;
goto out;
}
ECRYPTFS_DONT_VALIDATE_HEADER_SIZE);
if (rc) {
printk(KERN_DEBUG "Valid eCryptfs headers not found in "
- "file xattr region either\n");
+ "file xattr region either, inode %lu\n",
+ ecryptfs_inode->i_ino);
rc = -EINVAL;
}
if (crypt_stat->mount_crypt_stat->flags
"crypto metadata only in the extended attribute "
"region, but eCryptfs was mounted without "
"xattr support enabled. eCryptfs will not treat "
- "this like an encrypted file.\n");
+ "this like an encrypted file, inode %lu\n",
+ ecryptfs_inode->i_ino);
rc = -EINVAL;
}
}
out:
if (page_virt) {
memset(page_virt, 0, PAGE_CACHE_SIZE);
- kmem_cache_free(ecryptfs_header_cache_1, page_virt);
+ kmem_cache_free(ecryptfs_header_cache, page_virt);
}
return rc;
}
/* We could either offset on every reverse map or just pad some 0x00's
* at the front here */
-static const unsigned char filename_rev_map[] = {
+static const unsigned char filename_rev_map[256] = {
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 */
0x00, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, /* 103 */
0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, /* 111 */
0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, /* 119 */
- 0x3D, 0x3E, 0x3F
+ 0x3D, 0x3E, 0x3F /* 123 - 255 initialized to 0x00 */
};
/**
projects / firefly-linux-kernel-4.4.55.git / blobdiff