summaryrefslogtreecommitdiffstats
path: root/fs/ecryptfs/main.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ecryptfs/main.c')
-rw-r--r--fs/ecryptfs/main.c129
1 files changed, 101 insertions, 28 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 64d2ba980df..789cf2e1be1 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -115,6 +115,7 @@ void __ecryptfs_printk(const char *fmt, ...)
*/
int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
{
+ const struct cred *cred = current_cred();
struct ecryptfs_inode_info *inode_info =
ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
int rc = 0;
@@ -127,7 +128,7 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
rc = ecryptfs_privileged_open(&inode_info->lower_file,
- lower_dentry, lower_mnt);
+ lower_dentry, lower_mnt, cred);
if (rc || IS_ERR(inode_info->lower_file)) {
printk(KERN_ERR "Error opening lower persistent file "
"for lower_dentry [0x%p] and lower_mnt [0x%p]; "
@@ -205,7 +206,9 @@ enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig,
ecryptfs_opt_cipher, ecryptfs_opt_ecryptfs_cipher,
ecryptfs_opt_ecryptfs_key_bytes,
ecryptfs_opt_passthrough, ecryptfs_opt_xattr_metadata,
- ecryptfs_opt_encrypted_view, ecryptfs_opt_err };
+ ecryptfs_opt_encrypted_view, ecryptfs_opt_fnek_sig,
+ ecryptfs_opt_fn_cipher, ecryptfs_opt_fn_cipher_key_bytes,
+ ecryptfs_opt_err };
static const match_table_t tokens = {
{ecryptfs_opt_sig, "sig=%s"},
@@ -216,6 +219,9 @@ static const match_table_t tokens = {
{ecryptfs_opt_passthrough, "ecryptfs_passthrough"},
{ecryptfs_opt_xattr_metadata, "ecryptfs_xattr_metadata"},
{ecryptfs_opt_encrypted_view, "ecryptfs_encrypted_view"},
+ {ecryptfs_opt_fnek_sig, "ecryptfs_fnek_sig=%s"},
+ {ecryptfs_opt_fn_cipher, "ecryptfs_fn_cipher=%s"},
+ {ecryptfs_opt_fn_cipher_key_bytes, "ecryptfs_fn_key_bytes=%u"},
{ecryptfs_opt_err, NULL}
};
@@ -280,8 +286,11 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
int rc = 0;
int sig_set = 0;
int cipher_name_set = 0;
+ int fn_cipher_name_set = 0;
int cipher_key_bytes;
int cipher_key_bytes_set = 0;
+ int fn_cipher_key_bytes;
+ int fn_cipher_key_bytes_set = 0;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
&ecryptfs_superblock_to_private(sb)->mount_crypt_stat;
substring_t args[MAX_OPT_ARGS];
@@ -289,7 +298,12 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
char *sig_src;
char *cipher_name_dst;
char *cipher_name_src;
+ char *fn_cipher_name_dst;
+ char *fn_cipher_name_src;
+ char *fnek_dst;
+ char *fnek_src;
char *cipher_key_bytes_src;
+ char *fn_cipher_key_bytes_src;
if (!options) {
rc = -EINVAL;
@@ -321,10 +335,7 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
global_default_cipher_name;
strncpy(cipher_name_dst, cipher_name_src,
ECRYPTFS_MAX_CIPHER_NAME_SIZE);
- ecryptfs_printk(KERN_DEBUG,
- "The mount_crypt_stat "
- "global_default_cipher_name set to: "
- "[%s]\n", cipher_name_dst);
+ cipher_name_dst[ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0';
cipher_name_set = 1;
break;
case ecryptfs_opt_ecryptfs_key_bytes:
@@ -334,11 +345,6 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
&cipher_key_bytes_src, 0);
mount_crypt_stat->global_default_cipher_key_size =
cipher_key_bytes;
- ecryptfs_printk(KERN_DEBUG,
- "The mount_crypt_stat "
- "global_default_cipher_key_size "
- "set to: [%d]\n", mount_crypt_stat->
- global_default_cipher_key_size);
cipher_key_bytes_set = 1;
break;
case ecryptfs_opt_passthrough:
@@ -355,11 +361,51 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
mount_crypt_stat->flags |=
ECRYPTFS_ENCRYPTED_VIEW_ENABLED;
break;
+ case ecryptfs_opt_fnek_sig:
+ fnek_src = args[0].from;
+ fnek_dst =
+ mount_crypt_stat->global_default_fnek_sig;
+ strncpy(fnek_dst, fnek_src, ECRYPTFS_SIG_SIZE_HEX);
+ mount_crypt_stat->global_default_fnek_sig[
+ ECRYPTFS_SIG_SIZE_HEX] = '\0';
+ rc = ecryptfs_add_global_auth_tok(
+ mount_crypt_stat,
+ mount_crypt_stat->global_default_fnek_sig);
+ if (rc) {
+ printk(KERN_ERR "Error attempting to register "
+ "global fnek sig [%s]; rc = [%d]\n",
+ mount_crypt_stat->global_default_fnek_sig,
+ rc);
+ goto out;
+ }
+ mount_crypt_stat->flags |=
+ (ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES
+ | ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK);
+ break;
+ case ecryptfs_opt_fn_cipher:
+ fn_cipher_name_src = args[0].from;
+ fn_cipher_name_dst =
+ mount_crypt_stat->global_default_fn_cipher_name;
+ strncpy(fn_cipher_name_dst, fn_cipher_name_src,
+ ECRYPTFS_MAX_CIPHER_NAME_SIZE);
+ mount_crypt_stat->global_default_fn_cipher_name[
+ ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0';
+ fn_cipher_name_set = 1;
+ break;
+ case ecryptfs_opt_fn_cipher_key_bytes:
+ fn_cipher_key_bytes_src = args[0].from;
+ fn_cipher_key_bytes =
+ (int)simple_strtol(fn_cipher_key_bytes_src,
+ &fn_cipher_key_bytes_src, 0);
+ mount_crypt_stat->global_default_fn_cipher_key_bytes =
+ fn_cipher_key_bytes;
+ fn_cipher_key_bytes_set = 1;
+ break;
case ecryptfs_opt_err:
default:
- ecryptfs_printk(KERN_WARNING,
- "eCryptfs: unrecognized option '%s'\n",
- p);
+ printk(KERN_WARNING
+ "%s: eCryptfs: unrecognized option [%s]\n",
+ __func__, p);
}
}
if (!sig_set) {
@@ -373,33 +419,60 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
int cipher_name_len = strlen(ECRYPTFS_DEFAULT_CIPHER);
BUG_ON(cipher_name_len >= ECRYPTFS_MAX_CIPHER_NAME_SIZE);
-
strcpy(mount_crypt_stat->global_default_cipher_name,
ECRYPTFS_DEFAULT_CIPHER);
}
- if (!cipher_key_bytes_set) {
+ if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+ && !fn_cipher_name_set)
+ strcpy(mount_crypt_stat->global_default_fn_cipher_name,
+ mount_crypt_stat->global_default_cipher_name);
+ if (!cipher_key_bytes_set)
mount_crypt_stat->global_default_cipher_key_size = 0;
- }
+ if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+ && !fn_cipher_key_bytes_set)
+ mount_crypt_stat->global_default_fn_cipher_key_bytes =
+ mount_crypt_stat->global_default_cipher_key_size;
mutex_lock(&key_tfm_list_mutex);
if (!ecryptfs_tfm_exists(mount_crypt_stat->global_default_cipher_name,
- NULL))
+ NULL)) {
rc = ecryptfs_add_new_key_tfm(
NULL, mount_crypt_stat->global_default_cipher_name,
mount_crypt_stat->global_default_cipher_key_size);
- mutex_unlock(&key_tfm_list_mutex);
- if (rc) {
- printk(KERN_ERR "Error attempting to initialize cipher with "
- "name = [%s] and key size = [%td]; rc = [%d]\n",
- mount_crypt_stat->global_default_cipher_name,
- mount_crypt_stat->global_default_cipher_key_size, rc);
- rc = -EINVAL;
- goto out;
+ if (rc) {
+ printk(KERN_ERR "Error attempting to initialize "
+ "cipher with name = [%s] and key size = [%td]; "
+ "rc = [%d]\n",
+ mount_crypt_stat->global_default_cipher_name,
+ mount_crypt_stat->global_default_cipher_key_size,
+ rc);
+ rc = -EINVAL;
+ mutex_unlock(&key_tfm_list_mutex);
+ goto out;
+ }
}
+ if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+ && !ecryptfs_tfm_exists(
+ mount_crypt_stat->global_default_fn_cipher_name, NULL)) {
+ rc = ecryptfs_add_new_key_tfm(
+ NULL, mount_crypt_stat->global_default_fn_cipher_name,
+ mount_crypt_stat->global_default_fn_cipher_key_bytes);
+ if (rc) {
+ printk(KERN_ERR "Error attempting to initialize "
+ "cipher with name = [%s] and key size = [%td]; "
+ "rc = [%d]\n",
+ mount_crypt_stat->global_default_fn_cipher_name,
+ mount_crypt_stat->global_default_fn_cipher_key_bytes,
+ rc);
+ rc = -EINVAL;
+ mutex_unlock(&key_tfm_list_mutex);
+ goto out;
+ }
+ }
+ mutex_unlock(&key_tfm_list_mutex);
rc = ecryptfs_init_global_auth_toks(mount_crypt_stat);
- if (rc) {
+ if (rc)
printk(KERN_WARNING "One or more global auth toks could not "
"properly register; rc = [%d]\n", rc);
- }
out:
return rc;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 01:34:05 +0000