Hi,
The openssl rsa , permit to crypt just small files ( < 120 Bytes I think), so if I have big file and want to send it to my friend, of course I have his public Key?

must I split it in smaller ones ? If I do it throw the mail, does the MTA do it in my place ??

thanks a lot
bela

What type of file, and how big is it? Can you compress it?

$ gzip your_file

$ gpg --encrypt --armor your_file.bz (or substitute with your openssl equivalent)

If, after it's been compressed and encrypted, it is still > 2MB or so, you might consider getting it to him in some other way (i.e. not email).

Yeah, you could upload the file to a Web server and just send him the link. But if you need to use email and the file is too big for the attachment limit you could use the split command to break it into chunks.

I've had no trouble with openssl and large files (several hundred mb, maybe 1 gig). Compress it first, to save some space.

Leave off the -a for no base64, and it will be done for you if by mail.

Then he'd need to know the passwd you used. However, if you already have his PGP key, then the above suggestion (w/GPG) is probably the better choice. Be aware that many mail servers have size limits on the files they will send (mine is 50mb). There are plenty of free webhosts, though, if you don't have your own site to post it. If you IRC, you could DCC it, too.

I came across this one, but not actually used it (I've an ftp server, so no real reason to). They report that you need javascript/flash enabled, but beyond that no weird limits/timers/downloaders needed. The do mention some ads, but that's to be expected if they are giving away bandwidth to host people's files (which costs money). http://mihd.net/