Date: Sun, 8 Aug 2010 07:17:44 GMT From: Alan Hughes <tazalh@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/149412: bdes in CFB/OFB modes can't decrypt own output Message-ID: <201008080717.o787Hi62020300@www.freebsd.org> Resent-Message-ID: <201008080720.o787K44i037711@freefall.freebsd.org>
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>Number: 149412 >Category: bin >Synopsis: bdes in CFB/OFB modes can't decrypt own output >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Aug 08 07:20:04 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Alan Hughes >Release: 8.1 amd64/i386 >Organization: n/a >Environment: multiple, including release 8.1 amd64 CD in fixit environment also tested several stable amd64 and i386 with same results >Description: encrypted output from bdes on CFB or OFB modes does not decrypt with bdes. For some combinations of plaintext/key/mode/length decryption dumps core, all others merely fail 'nicely'. CBC(default) and ECB modes are unaffected. labeled non-critical/low-priority as these would be rarely used modes. >How-To-Repeat: opt='-f 64 -k $key' ;key=0x$(md5 -qs "testpass") ;echo "plaintext for testing bdes" |bdes $opt |bdes -d $opt replacing "-f 64" with -F or -o and other suitable length >Fix: don't use CFB or OFB modes. >Release-Note: >Audit-Trail: >Unformatted:
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