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zero-fill hash context for safety

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Vladimir 'phcoder' Serbinenko 2011-04-24 02:34:32 +02:00
parent 1a1f408f20
commit b44cd9e710
1 changed files with 3 additions and 0 deletions
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3
grub-core/disk/cryptodisk.c
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@ -200,6 +200,9 @@ grub_cryptodisk_decrypt (const struct grub_cryptodisk *dev,
{ {
grub_uint64_t tmp; grub_uint64_t tmp;
grub_uint64_t ctx[(dev->iv_hash->contextsize + 7) / 8]; grub_uint64_t ctx[(dev->iv_hash->contextsize + 7) / 8];
grub_memset (ctx, 0, sizeof (ctx));
tmp = grub_cpu_to_le64 (sector << GRUB_DISK_SECTOR_BITS); tmp = grub_cpu_to_le64 (sector << GRUB_DISK_SECTOR_BITS);
dev->iv_hash->init (ctx); dev->iv_hash->init (ctx);
dev->iv_hash->write (ctx, dev->iv_prefix, dev->iv_prefix_len); dev->iv_hash->write (ctx, dev->iv_prefix, dev->iv_prefix_len);