Hi, I do see that the file starts with "VimCrypt~01!" for pkzip and "VimCrypt~02!" for blowfish, and the bytes after the header for pkzip encryption does not change (as pkzip encryption does not have an iv), so I think those are the encrypted bytes, but I cannot figure out what decryption algorithm to use for that. As for blowfish, I would guess the 8 or 16 bytes after the header represent the iv, but not exactly sure how. If there is a way to locate the iv for blowfish, I guess I should be able to use cryptopp to decrypt the other data, but the problem is I cannot locate any documentation that describes the format. Thanks.
On Tue, Apr 12, 2011 at 11:14 AM, Tony Mechelynck < antoine.mechely...@gmail.com> wrote: > On 12/04/11 17:19, diyu01 wrote: > >> Hi, I am using vim to edit encrypted files and it works great. >> However, I want to be able to read the (decrypted) file content from a >> C++ application using cryptopp library. I am willing to embed the >> password into the application, but how do I access the data? For >> example, if the data is encrypted with blowfish, where do I get the >> iv? If the data is encrypted with pkzip, what is the exact encryption >> algorithm name that I should choose in cryptopp? (for some reason I >> only see it being described as "zip", I never found out what the exact >> algorithm name is). Thanks! >> >> > AFAIK, you don't. There are some magic bytes at the start of the file which > tell Vim that the file was encrypted, and with which encryption method. > > But you can of course run Vim as a batch program, with command-line > switches to set 'key' then read the file and write it under another name. > This wouldn't really be setting an example of secure processing however. > > > Best regards, > Tony. > -- > Really heard in court in the U.S.A.: > Q.: Doctor, before you started the autopsy, did you check the pulse? > A.: No, I didn't. > Q.: Did you test the blood pressure? > A.: No, I didn't. > Q.: Did you check the breathing? > A.: No, I didn't. > Q.: Then there is a possibility that you autopsied a living person? > A.: No, there isn't. > Q.: How can you be so sure, Doctor? > A.: Because his brain was in a jar on my desk. > Q.: I see. But couldn't the patient be still alive nevertheless? > A.: Hm, yes, he could still be alive, practicing as a lawyer. > -- You received this message from the "vim_use" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php
