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7f05fface3
IVs != 96 bits get hashed with GHASH to bring them to 96 bits. Any call to GHASH will mix the ghash state in gcm_ghash. This is expected to be zero at first use in an encrypt or decrypt operation, so it needs to be zeroed after using GHASH in setup. gcm_init() does this, but gcm_avx_init() zeroed it before setup, not after, resulting in incorrect encrypt/decrypt results when using AVX GCM with an IV != 96 bits. OpenZFS _always_ uses a 96 bit IV (ZIO_DATA_IV_LEN) so this will never have been hit in any real-world use, which is extremely fortunate, as we would have incorrectly-encrypted data on-disk. Still, as long as we have this code here we should make sure it's correct. Thanks-to: Joel Low <joel@joelsplace.sg> Sponsored-by: https://despairlabs.com/sponsor/ Signed-off-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de> Reviewed-by: Attila Fülöp <attila@fueloep.org> |
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| algs | ||
| api | ||
| asm-aarch64 | ||
| asm-arm/sha2 | ||
| asm-ppc64 | ||
| asm-x86_64 | ||
| core | ||
| include | ||
| io | ||
| spi | ||
| illumos-crypto.c | ||