volume_id: display hfs[+] 128-bit UUID properly

Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/util-linux/volume_id/hfs.c b/util-linux/volume_id/hfs.c
index dd5ec2415..3d9704d12 100644
--- a/util-linux/volume_id/hfs.c
+++ b/util-linux/volume_id/hfs.c
@@ -131,6 +131,27 @@ struct hfsplus_vol_header {
 #define HFS_NODE_LEAF                   0xff
 #define HFSPLUS_POR_CNID                1
 
+static void FAST_FUNC hfs_set_uuid(struct volume_id *id, const uint8_t *hfs_id)
+{
+#define hfs_id_len 8
+        md5_ctx_t md5c;
+        uint8_t uuid[16];
+        unsigned i;
+
+        for (i = 0; i < hfs_id_len; i++)
+                if (hfs_id[i] != 0)
+                        goto do_md5;
+        return;
+ do_md5:
+        md5_begin(&md5c);
+        md5_hash(&md5c, "\263\342\17\71\362\222\21\326\227\244\0\60\145\103\354\254", 16);
+        md5_hash(&md5c, hfs_id, hfs_id_len);
+        md5_end(&md5c, uuid);
+        uuid[6] = 0x30 | (uuid[6] & 0x0f);
+        uuid[8] = 0x80 | (uuid[8] & 0x3f);
+        volume_id_set_uuid(id, uuid, UUID_DCE);
+}
+
 int FAST_FUNC volume_id_probe_hfs_hfsplus(struct volume_id *id /*,uint64_t off*/)
 {
         uint64_t off = 0;
@@ -193,7 +214,7 @@ int FAST_FUNC volume_id_probe_hfs_hfsplus(struct volume_id *id /*,uint64_t off*/
                 volume_id_set_label_string(id, hfs->label, hfs->label_len) ;
         }
 
-        volume_id_set_uuid(id, hfs->finder_info.id, UUID_HFS);
+        hfs_set_uuid(id, hfs->finder_info.id);
 //      volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
         IF_FEATURE_BLKID_TYPE(id->type = "hfs";)
 
@@ -207,7 +228,7 @@ int FAST_FUNC volume_id_probe_hfs_hfsplus(struct volume_id *id /*,uint64_t off*/
         return -1;
 
  hfsplus:
-        volume_id_set_uuid(id, hfsplus->finder_info.id, UUID_HFS);
+        hfs_set_uuid(id, hfsplus->finder_info.id);
 
         blocksize = be32_to_cpu(hfsplus->blocksize);
         dbg("blocksize %u", blocksize);