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Bug fix: GPT header CRC was computed from all 512 bytes rather than from 92.

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This commit is contained in:
Thomas Schmitt 2013-04-17 16:45:51 +02:00
parent ff3b439bda
commit 91f5ebb376
1 changed files with 2 additions and 2 deletions
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4
libisofs/system_area.c
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@ -1309,7 +1309,7 @@ int iso_write_gpt_header_block(Ecma119Image *t, uint32_t img_blocks,
} }
/* CRC-32 of this header while head_crc is 0 */ /* CRC-32 of this header while head_crc is 0 */
crc = iso_crc32_gpt((unsigned char *) buf, 512, 0); crc = iso_crc32_gpt((unsigned char *) buf, 92, 0);
wpt = ((char *) buf) + 16; wpt = ((char *) buf) + 16;
iso_lsb_to_buf(&wpt, crc, 4, 0); iso_lsb_to_buf(&wpt, crc, 4, 0);
@ -2137,7 +2137,7 @@ tampered_head:;
/* Compute new header CRC */ /* Compute new header CRC */
memset(new_head + 16, 0, 4); memset(new_head + 16, 0, 4);
crc = iso_crc32_gpt((unsigned char *) new_head, 512, 0); crc = iso_crc32_gpt((unsigned char *) new_head, 92, 0);
iso_lsb(new_head + 16, crc, 4); iso_lsb(new_head + 16, crc, 4);
/* Copy GPT entries */ /* Copy GPT entries */