diff options
Diffstat (limited to 'src/shared/gpt.c')
| -rw-r--r-- | src/shared/gpt.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/shared/gpt.c b/src/shared/gpt.c index 34180a32c5..2846bad5b8 100644 --- a/src/shared/gpt.c +++ b/src/shared/gpt.c @@ -336,3 +336,24 @@ bool gpt_partition_type_knows_no_auto(GptPartitionType type) { PARTITION_XBOOTLDR, PARTITION_SWAP); } + +bool gpt_header_has_signature(const GptHeader *p) { + assert(p); + + if (memcmp(p->signature, (const char[8]) { 'E', 'F', 'I', ' ', 'P', 'A', 'R', 'T' }, 8) != 0) + return false; + + if (le32toh(p->revision) != UINT32_C(0x00010000)) /* the only known revision of the spec: 1.0 */ + return false; + + if (le32toh(p->header_size) < sizeof(GptHeader)) + return false; + + if (le32toh(p->header_size) > 4096) /* larger than a sector? something is off… */ + return false; + + if (le64toh(p->my_lba) != 1) /* this sector must claim to be at sector offset 1 */ + return false; + + return true; +} |