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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-08-21 04:27:46 -0500 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-09-23 09:10:32 -0500 |
| commit | df6ad33ba1b9846bd5f0e2b9016c30c20bc2d948 (patch) | |
| tree | 5bed7a289830867f2bac4dc05f076b7121e41ae3 /fs/ecryptfs | |
| parent | ac22ba23b659e34a5961aec8c945608e471b0d5b (diff) | |
| download | linux-df6ad33ba1b9846bd5f0e2b9016c30c20bc2d948.tar.gz linux-df6ad33ba1b9846bd5f0e2b9016c30c20bc2d948.tar.bz2 linux-df6ad33ba1b9846bd5f0e2b9016c30c20bc2d948.zip | |
eCryptfs: Filename encryption only supports password auth tokens
Returns -ENOTSUPP when attempting to use filename encryption with
something other than a password authentication token, such as a private
token from openssl. Using filename encryption with a userspace eCryptfs
key module is a future goal. Until then, this patch handles the
situation a little better than simply using a BUG_ON().
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: ecryptfs-devel@lists.launchpad.net
Cc: stable <stable@kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Diffstat (limited to 'fs/ecryptfs')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 4 | ||||
| -rw-r--r-- | fs/ecryptfs/keystore.c | 14 |
2 files changed, 14 insertions, 4 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index f92370aa5704..bae20ad1a504 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -1703,7 +1703,7 @@ ecryptfs_encrypt_filename(struct ecryptfs_filename *filename, } else { printk(KERN_ERR "%s: No support for requested filename " "encryption method in this release\n", __func__); - rc = -ENOTSUPP; + rc = -EOPNOTSUPP; goto out; } out: @@ -2168,7 +2168,7 @@ int ecryptfs_encrypt_and_encode_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 " diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c index 3a61f056acf6..17164e483ab1 100644 --- a/fs/ecryptfs/keystore.c +++ b/fs/ecryptfs/keystore.c @@ -612,7 +612,12 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, } /* TODO: Support other key modules than passphrase for * filename encryption */ - BUG_ON(s->auth_tok->token_type != ECRYPTFS_PASSWORD); + if (s->auth_tok->token_type != ECRYPTFS_PASSWORD) { + rc = -EOPNOTSUPP; + printk(KERN_INFO "%s: Filename encryption only supports " + "password tokens\n", __func__); + goto out_free_unlock; + } sg_init_one( &s->hash_sg, (u8 *)s->auth_tok->token.password.session_key_encryption_key, @@ -910,7 +915,12 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, } /* TODO: Support other key modules than passphrase for * filename encryption */ - BUG_ON(s->auth_tok->token_type != ECRYPTFS_PASSWORD); + if (s->auth_tok->token_type != ECRYPTFS_PASSWORD) { + rc = -EOPNOTSUPP; + printk(KERN_INFO "%s: Filename encryption only supports " + "password tokens\n", __func__); + goto out_free_unlock; + } rc = crypto_blkcipher_setkey( s->desc.tfm, s->auth_tok->token.password.session_key_encryption_key, |