* Milan Broz | 2010-01-25 19:39:11 [+0100]: >On 01/25/2010 07:29 PM, Mikulas Patocka wrote: >> Hi >> >> When using arc4 to encrypt a block device, the resulting device is >> unreliable. It reads garbage. That's because arc4 is a stream cipher, if >> you write something, it advances its state and if you attempt to decrypt >> the same sector, it uses new state that is different. >> >> This patch disables the use of arc4 on block devices. > >arc4 again. it is simply not a block cipher:-) > >This should be solved inside cryptoAPI and not blacklist it in dm-crypt, >see that thread >http://article.gmane.org/gmane.linux.kernel.cryptoapi/3441 I some how remember Herbert saying to test for block size > 1. Wouldn't this be acceptable to block all stream cipher in one go? >Milan Sebastian -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
