pldm: Add verify CRC value of the BIOS table
Add a checksum methods to the BIOS table and verify the integrity
of the BIOS table.
Tested: add the UTest method and pass the test.
Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I57849714b0450b65fd894f767b15ab47de8cde89
diff --git a/libpldm/bios_table.c b/libpldm/bios_table.c
index e4e7d96..58c331b 100644
--- a/libpldm/bios_table.c
+++ b/libpldm/bios_table.c
@@ -1117,3 +1117,19 @@
pldm_bios_table_iter_free(iter);
return rc;
}
+
+bool pldm_bios_table_checksum(const uint8_t *table, size_t size)
+{
+ if (table == NULL)
+ return false;
+
+ // 12: BIOSStringHandle(uint16) + BIOSStringLength(uint16) +
+ // Variable(4) + checksum(uint32)
+ if (size < 12)
+ return false;
+
+ uint32_t src_crc = le32toh(*(uint32_t *)(table + size - 4));
+ uint32_t dst_crc = crc32(table, size - 4);
+
+ return src_crc == dst_crc;
+}