October 2009 - aescrypt - lists.packetizer.com

Re: [aescrypt] [Fwd: java aes crypt could not support the excel]
by David García 29 Oct '09

29 Oct '09

Hi, It was easy to spot the bug and fix it. The problem was related to the way the last block size was computed. Other changes I've also made: - Added a test suite to make sure AESCrypt.java works as expected. - Fixed a bug when reading the HMAC of an empty payload. - Make sure the "AES" header is correctly encoded. - Some typos in messages and documentation. Paul, would you please publish the new version on the web? Regards, David On Thu, Oct 29, 2009 at 11:14 AM, David García <david.garcia(a)vocali.net>wrote: > Thanks for the test file. > > It definitely is a bug. > I'm working on it now and will be back when it's fixed. > > Sorry for the inconvenience. > > > On Thu, Oct 29, 2009 at 10:04 AM, 赵鲁 <zhaolu(a)ceopen.cn> wrote: > >> >> >> >> 2009-10-29 >> ------------------------------ >> 赵鲁 >> ------------------------------ >> *发件人：* David_García >> *发送时间：* 2009-10-29 16:38:00 >> *收件人：* 赵鲁 >> *抄送：* aescrypt; Paul E. Jones >> *主题：* Re: Re: [aescrypt] [Fwd: java aes crypt could not support the >> excel] >> OK. I'll try to reproduce it, but it would be easier if you could send >> me a test file (XLS that fails). >> >> On Thu, Oct 29, 2009 at 2:13 AM, 赵鲁 <zhaolu(a)ceopen.cn> wrote: >> >>> yes，I tried XLS files with different sizes,but not success. >>> >>> >>> 2009-10-29 >>> ------------------------------ >>> 赵鲁 >>> ------------------------------ >>> *发件人：* David_Garc韆 >>> *发送时间：* 2009-10-28 20:46:40 >>> *收件人：* Paul E. Jones >>> *抄送：* 赵鲁; aescrypt >>> *主题：* Re: [aescrypt] [Fwd: java aes crypt could not support the excel] >>> Hi, >>> >>> Most probably, the bug is related to the way the file size modulo is >>> computed, as the algorithm behavior has nothing to do with file types. >>> >>> Could you try XLS files with different sizes? >>> Could you provide the XLS file or, if not possible, the size of your XLS >>> file? >>> >>> Thanks. >>> >>> David >>> >>> >>> On Wed, Oct 28, 2009 at 1:18 PM, Paul E. Jones <paulej(a)packetizer.com>wrote: >>> >>>> That should definitely not happen. The fact it is an XLS file should >>>> also make no difference at all. Perhaps there is a bug with either reading >>>> or writing the file modulo? >>>> >>>> David, would you be able to provide some guidance? >>>> >>>> Paul >>>> >>>> 赵鲁 wrote: >>>> >>>> >>>> For example , I decrypt the file of a.xls.aes with java AESCrypt , but >>>> the decrypted file a.xls couldn't opened normally . >>>> I modify the code in the AESCrypt.java >>>> <old code> >>>> if (block == 1) { >>>> len = in.read(); // 4 bits size mod 16. >>>> debug("4 bits size mod 16: " + len); >>>> } >>>> out.write(text, 0, len); >>>> <new code> >>>> if (block == 1) { >>>> if (!toFile.toLowerCase().endsWith(".xls")) { >>>> len = in.read(); >>>> debug("4 bits size mod 16: " + len); >>>> } >>>> } >>>> out.write(text, 0, len); >>>> >>>> now ,I can open it normally. >>>> >>>> >>>> 2009-10-28 >>>> ------------------------------ >>>> 赵鲁 >>>> ------------------------------ >>>> *发件人：* Paul E. Jones >>>> *发送时间：* 2009-10-27 16:15:37 >>>> *收件人：* aescrypt; 赵鲁 >>>> *抄送：* >>>> *主题：* [Fwd: java aes crypt could not support the excel] >>>> >>>> 赵鲁, >>>> >>>> I am forwarding your message to the AES Crypt mailing list to see if >>>> others might be able to help you. However, it's not entirely clear what the >>>> issue is, so can you clarify it further? >>>> >>>> Thanks, >>>> Paul >>>> >>>> -------- Original Message -------- Subject: java aes crypt could not >>>> support the excel Date: Tue, 27 Oct 2009 10:26:50 +0800 From: 赵鲁 >>>> <zhaolu(a)ceopen.cn> <zhaolu(a)ceopen.cn> To: support >>>> <support(a)packetizer.com> <support(a)packetizer.com> >>>> >>>> >>>> Hi£º >>>> >>>> java aes crypt could not support the excel , please give me a help >>>> ,thanks very much. >>>> >>>> >>>> >>>> zhaolu >>>> 2009-10-27 >>>> ------------------------------ >>>> http://www.ceopen.cn >>>> >>>> >>>> >>>> >>> >> >

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Re: [aescrypt] [Fwd: java aes crypt could not support the excel]
by Paul E. Jones 29 Oct '09

29 Oct '09

That should definitely not happen. The fact it is an XLS file should also make no difference at all. Perhaps there is a bug with either reading or writing the file modulo? David, would you be able to provide some guidance? Paul 赵鲁 wrote: > > For example , I decrypt the file of a.xls.aes with java AESCrypt , but > the decrypted file a.xls couldn't opened normally . > I modify the code in the AESCrypt.java > <old code> > if (block == 1) { > len = in.read(); // 4 bits size mod 16. > debug("4 bits size mod 16: " + len); > } > out.write(text, 0, len); > <new code> > if (block == 1) { > if (!toFile.toLowerCase().endsWith(".xls")) { > len = in.read(); > debug("4 bits size mod 16: " + len); > } > } > out.write(text, 0, len); > > now ,I can open it normally. > > > 2009-10-28 > ------------------------------------------------------------------------ > 赵鲁 > ------------------------------------------------------------------------ > *发件人：* Paul E. Jones > *发送时间：* 2009-10-27 16:15:37 > *收件人：* aescrypt; 赵鲁 > *抄送：* > *主题：* [Fwd: java aes crypt could not support the excel] > > 赵鲁, > > I am forwarding your message to the AES Crypt mailing list to see if > others might be able to help you. However, it's not entirely clear > what the issue is, so can you clarify it further? > > Thanks, > Paul > > -------- Original Message -------- > Subject: java aes crypt could not support the excel > Date: Tue, 27 Oct 2009 10:26:50 +0800 > From: 赵鲁 <zhaolu(a)ceopen.cn> > To: support <support(a)packetizer.com> > > > > > Hi£º > > java aes crypt could not support the excel , please give me a help > ,thanks very much. > > > > zhaolu > 2009-10-27 > ------------------------------------------------------------------------ > http://www.ceopen.cn > > > >

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[Fwd: java aes crypt could not support the excel]
by Paul E. Jones 27 Oct '09

27 Oct '09

赵鲁, I am forwarding your message to the AES Crypt mailing list to see if others might be able to help you. However, it's not entirely clear what the issue is, so can you clarify it further? Thanks, Paul -------- Original Message -------- Subject: java aes crypt could not support the excel Date: Tue, 27 Oct 2009 10:26:50 +0800 From: 赵鲁 <zhaolu(a)ceopen.cn> To: support <support(a)packetizer.com> Hi£º java aes crypt could not support the excel , please give me a help ,thanks very much. zhaolu 2009-10-27 ------------------------------------------------------------------------ http://www.ceopen.cn

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