[PATCH 2/3] ubifs-media: Add authentication support

[Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>]

Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
 include/mtd/ubifs-media.h | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/include/mtd/ubifs-media.h b/include/mtd/ubifs-media.h
index 7c938b9..be2d890 100644
--- a/include/mtd/ubifs-media.h
+++ b/include/mtd/ubifs-media.h
@@ -289,6 +289,8 @@ enum {
 #define UBIFS_CS_NODE_SZ   sizeof(struct ubifs_cs_node)
 #define UBIFS_ORPH_NODE_SZ sizeof(struct ubifs_orph_node)
 #define UBIFS_AUTH_NODE_SZ sizeof(struct ubifs_auth_node)
+#define UBIFS_SIG_NODE_SZ  sizeof(struct ubifs_sig_node)
+
 /* Extended attribute entry nodes are identical to directory entry nodes */
 #define UBIFS_XENT_NODE_SZ UBIFS_DENT_NODE_SZ
 /* Only this does not have to be multiple of 8 bytes */
@@ -375,6 +377,7 @@ enum {
  * UBIFS_CS_NODE: commit start node
  * UBIFS_ORPH_NODE: orphan node
  * UBIFS_AUTH_NODE: authentication node
+ * UBIFS_SIG_NODE: signature node
  * UBIFS_NODE_TYPES_CNT: count of supported node types
  *
  * Note, we index arrays by these numbers, so keep them low and contiguous.
@@ -395,6 +398,7 @@ enum {
 	UBIFS_CS_NODE,
 	UBIFS_ORPH_NODE,
 	UBIFS_AUTH_NODE,
+	UBIFS_SIG_NODE,
 	UBIFS_NODE_TYPES_CNT,
 };
 
@@ -652,6 +656,8 @@ struct ubifs_pad_node {
  * @hmac_wkm: HMAC of a well known message (the string "UBIFS") as a convenience
  *            to the user to check if the correct key is passed.
  * @hash_algo: The hash algo used for this filesystem (one of enum hash_algo)
+ * @hash_mst: hash of the master node, only valid for signed images in which the
+ *            master node does not contain a hmac
  */
 struct ubifs_sb_node {
 	struct ubifs_ch ch;
@@ -682,7 +688,8 @@ struct ubifs_sb_node {
 	__u8 hmac[UBIFS_MAX_HMAC_LEN];
 	__u8 hmac_wkm[UBIFS_MAX_HMAC_LEN];
 	__le16 hash_algo;
-	__u8 padding2[3838];
+	__u8 hash_mst[UBIFS_MAX_HASH_LEN];
+	__u8 padding2[3774];
 } __attribute__ ((packed));
 
 /**
@@ -784,6 +791,18 @@ struct ubifs_auth_node {
 	__u8 hmac[];
 } __attribute__ ((packed));
 
+/**
+ * struct ubifs_sig_node - node for signing other nodes
+ * @ch: common header
+ * @len: The length of the signature data
+ * @sig: The signature data
+ */
+struct ubifs_sig_node {
+	struct ubifs_ch ch;
+	__le32 len;
+	__u8 sig[];
+} __attribute__ ((packed));
+
 /**
  * struct ubifs_branch - key/reference/length branch
  * @lnum: LEB number of the target node
-- 
2.20.1


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