> On Nov 7, 2016, at 4:47 PM, MacQueen, Don <macque...@llnl.gov> wrote: > > I have a file containing encrypted contents. The contents can be decrypted > using perl, like this: > > open (FILEHANDLE, "/path/to/file") > chomp ($ciphertext = <FILEHANDLE>); > > > use Crypt::CBC; > $cipher = Crypt::CBC->new( -key => 'my secret key', > -cipher => 'Blowfish' > ); > > $plaintext = $cipher->decrypt($ciphertext); > > > (See http://search.cpan.org/~lds/Crypt-CBC-2.33/CBC.pm) > > M goal is to have the value of $plaintext in an R object, so, is there an > R equivalent to this decrypt() perl function? > > I've found R packages > bcrypt > sodium > that appear to have potential, but I don't understand this business well > enough to figure out how to use them, if indeed they can be used, for > this. Help would be much appreciated. > > Thanks > -Don >
Hi Don, Blowfish is Bruce Schneier's algorithm from the early 90's, which even Bruce suggested some time ago not be used. Bruce has some alternative Blowfish implementations available via his web site: https://www.schneier.com/academic/blowfish/download.html <https://www.schneier.com/academic/blowfish/download.html> and there is a link there for some third party products that still have it and might provide for a CLI based interface as an alternative (e.g. GnuPG) if you need to use it. >From what I can tell, 'sodium' does not support Blowfish and the >implementation in bcrypt, if I am reading correctly, only provides for a >one-way hash implementation, as opposed to encrypt/decrypt functions. Thus, barring that my searching for alternative R implementations of Blowfish resulted in a Type II error, I do not see any R implementations of Blowfish that support encrypt/decrypt. If you want to use the Perl module implementation via R, you can take a look at my WriteXLS package on GitHub: https://github.com/marcschwartz/WriteXLS <https://github.com/marcschwartz/WriteXLS> and see how I call Perl scripts within WriteXLS.R: https://github.com/marcschwartz/WriteXLS/blob/master/R/WriteXLS.R <https://github.com/marcschwartz/WriteXLS/blob/master/R/WriteXLS.R> around line 242. That might provide one method for you. That all being said, as per Bruce's recommendation, there are "better" encryption/decryption algorithms these days (some in the 'digest' package by Dirk), depending upon who you are trying to protect the data from... :-) Regards, Marc Schwartz [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
