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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2018-09-07 14:36:43 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2018-10-23 13:48:57 +0200 |
| commit | 104115a3eb54e7e804cd4ef1d6426c0b8aaaeb60 (patch) | |
| tree | f71f1b6e06ffd7050d2bde6a4c59fc2c109879f7 | |
| parent | e158e02ff70038936d374928a5484f16daa4c7d4 (diff) | |
| download | linux-0-day-104115a3eb54e7e804cd4ef1d6426c0b8aaaeb60.tar.gz linux-0-day-104115a3eb54e7e804cd4ef1d6426c0b8aaaeb60.tar.xz | |
ubifs: Add hashes and HMACs to default filesystem
This patch calculates the necessary hashes and HMACs for the default
filesystem so that the dynamically created default fs can be
authenticated.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
| -rw-r--r-- | fs/ubifs/sb.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c index 7f0967771c9f7..ac1ed5ad126db 100644 --- a/fs/ubifs/sb.c +++ b/fs/ubifs/sb.c @@ -87,6 +87,7 @@ static int create_default_filesystem(struct ubifs_info *c) __le64 tmp_le64; __le32 tmp_le32; struct timespec64 ts; + u8 hash[UBIFS_HASH_ARR_SZ]; u8 hash_lpt[UBIFS_HASH_ARR_SZ]; /* Some functions called from here depend on the @c->key_len filed */ @@ -177,6 +178,16 @@ static int create_default_filesystem(struct ubifs_info *c) sup_flags |= UBIFS_FLG_BIGLPT; sup_flags |= UBIFS_FLG_DOUBLE_HASH; + if (ubifs_authenticated(c)) { + sup_flags |= UBIFS_FLG_AUTHENTICATION; + sup->hash_algo = cpu_to_le16(c->auth_hash_algo); + err = ubifs_hmac_wkm(c, sup->hmac_wkm); + if (err) + goto out; + } else { + sup->hash_algo = 0xffff; + } + sup->ch.node_type = UBIFS_SB_NODE; sup->key_hash = UBIFS_KEY_HASH_R5; sup->flags = cpu_to_le32(sup_flags); @@ -235,6 +246,7 @@ static int create_default_filesystem(struct ubifs_info *c) mst->empty_lebs = cpu_to_le32(main_lebs - 2); mst->idx_lebs = cpu_to_le32(1); mst->leb_cnt = cpu_to_le32(c->leb_cnt); + ubifs_copy_hash(c, hash_lpt, mst->hash_lpt); /* Calculate lprops statistics */ tmp64 = main_bytes; @@ -307,25 +319,33 @@ static int create_default_filesystem(struct ubifs_info *c) cs->ch.node_type = UBIFS_CS_NODE; - err = ubifs_write_node(c, sup, UBIFS_SB_NODE_SZ, 0, 0); + err = ubifs_write_node_hmac(c, sup, UBIFS_SB_NODE_SZ, 0, 0, + offsetof(struct ubifs_sb_node, hmac)); if (err) goto out; - err = ubifs_write_node(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM, 0); + err = ubifs_write_node(c, ino, UBIFS_INO_NODE_SZ, + main_first + DEFAULT_DATA_LEB, 0); if (err) goto out; - err = ubifs_write_node(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM + 1, - 0); + ubifs_node_calc_hash(c, ino, hash); + ubifs_copy_hash(c, hash, ubifs_branch_hash(c, br)); + + err = ubifs_write_node(c, idx, idx_node_size, main_first + DEFAULT_IDX_LEB, 0); if (err) goto out; - err = ubifs_write_node(c, idx, idx_node_size, main_first + DEFAULT_IDX_LEB, 0); + ubifs_node_calc_hash(c, idx, hash); + ubifs_copy_hash(c, hash, mst->hash_root_idx); + + err = ubifs_write_node_hmac(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM, 0, + offsetof(struct ubifs_mst_node, hmac)); if (err) goto out; - err = ubifs_write_node(c, ino, UBIFS_INO_NODE_SZ, - main_first + DEFAULT_DATA_LEB, 0); + err = ubifs_write_node_hmac(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM + 1, + 0, offsetof(struct ubifs_mst_node, hmac)); if (err) goto out; |