1 files changed, 20 insertions, 0 deletions
diff --git a/crypto/ext4crypt/ext4crypt_tar.h b/crypto/ext4crypt/ext4crypt_tar.h
index 1c9cef0a5..c35d11571 100644
--- a/crypto/ext4crypt/ext4crypt_tar.h
+++ b/crypto/ext4crypt/ext4crypt_tar.h
@@ -21,8 +21,25 @@
 #include <stdbool.h>
 #include <cutils/multiuser.h>
 
+// ext4enc:TODO Include structure from somewhere sensible
+// MUST be in sync with ext4_crypto.c in kernel
+#define EXT4_KEY_DESCRIPTOR_SIZE 8
+#define EXT4_KEY_DESCRIPTOR_SIZE_HEX 17
+
+// ext4enc:TODO Get value from somewhere sensible
+#define EXT4_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct ext4_encryption_policy)
+#define EXT4_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct ext4_encryption_policy)
+
 __BEGIN_DECLS
 
+struct ext4_encryption_policy {
+    char version;
+    char contents_encryption_mode;
+    char filenames_encryption_mode;
+    char flags;
+    char master_key_descriptor[EXT4_KEY_DESCRIPTOR_SIZE];
+} __attribute__((__packed__));
+
 bool lookup_ref_key(const char* policy, char* policy_type);
 bool lookup_ref_tar(const char* policy_type, char* policy);
 
@@ -31,6 +48,9 @@ bool e4crypt_policy_set(const char *directory, const char *policy,
                                size_t policy_length, int contents_encryption_mode);
 bool e4crypt_policy_get(const char *directory, char *policy,
                                size_t policy_length, int contents_encryption_mode);
+void e4crypt_policy_fill_default_struct(struct ext4_encryption_policy *eep);
+bool e4crypt_policy_set_struct(const char *directory, const struct ext4_encryption_policy *eep);
+bool e4crypt_policy_get_struct(const char *directory, struct ext4_encryption_policy *eep);
 
 bool e4crypt_set_mode();
 __END_DECLS