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volume_id: add comment about hfs uuid conversion

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This commit is contained in:
Kay Sievers 2006-10-15 18:20:15 +02:00
parent 2658afdcf1
commit 2412f0886d
1 changed files with 28 additions and 2 deletions
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30
extras/volume_id/lib/hfs.c
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@ -137,6 +137,32 @@ static struct hfsplus_vol_header {
#define HFS_NODE_LEAF 0xff
#define HFSPLUS_POR_CNID 1
static void hfsid_set_uuid(struct volume_id *id, const uint8_t *hfs_id)
{
#if 0
MD5_CTX md5c;
static const uint8_t hash_init[16] = {
0xb3, 0xe2, 0x0f, 0x39, 0xf2, 0x92, 0x11, 0xd6,
0x97, 0xa4, 0x00, 0x30, 0x65, 0x43, 0xec, 0xac
};
uint8_t uuid[16];
if (*((uint64_t *)hfs_id) == 0)
return;
MD5_Init(&md5c);
MD5_Update(&md5c, &hash_init, 16);
MD5_Update(&md5c, hfs_id, 8);
MD5_Final(uuid, &md5c);
uuid[6] = 0x30 | (uuid[6] & 0x0f);
uuid[8] = 0x80 | (uuid[8] & 0x3f);
volume_id_set_uuid(id, uuid, UUID_DCE);
#endif
volume_id_set_uuid(id, hfs_id, UUID_HFS);
}
int volume_id_probe_hfs_hfsplus(struct volume_id *id, uint64_t off, uint64_t size)
{
unsigned int blocksize;
@ -196,7 +222,7 @@ int volume_id_probe_hfs_hfsplus(struct volume_id *id, uint64_t off, uint64_t siz
volume_id_set_label_string(id, hfs->label, hfs->label_len) ;
}
volume_id_set_uuid(id, hfs->finder_info.id, UUID_HFS);
hfsid_set_uuid(id, hfs->finder_info.id);
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
id->type = "hfs";
@ -212,7 +238,7 @@ checkplus:
return -1;
hfsplus:
volume_id_set_uuid(id, hfsplus->finder_info.id, UUID_HFS);
hfsid_set_uuid(id, hfsplus->finder_info.id);
blocksize = be32_to_cpu(hfsplus->blocksize);
dbg("blocksize %u", blocksize);