Simplest way to encrypt / decrypt a string?

Rails
1

I have done multiple google searches and searched the mailing list. All
of the solutions I found seemed kind of heavy / complicated. I just want
a very simple way to encrypt and decrypt a string. Something like:

encrypt(“fdsfdsfdsf”, “some key”);
decrypt(“fdsfdsfsdf”, “some key”);

Is this possible?

Thanks for your help.

2

Ben J. wrote:

I have done multiple google searches and searched the mailing list. All
of the solutions I found seemed kind of heavy / complicated. I just want
a very simple way to encrypt and decrypt a string. Something like:

encrypt(“fdsfdsfdsf”, “some key”);
decrypt(“fdsfdsfsdf”, “some key”);

Is this possible?

Thanks for your help.

There’s a simple solution if all you want to do is store passwords or

something like that. The thing with this is that you can’t decrypt the
string, because the result is a hash of what you want to encode… But,
as it always generates the same hash for the same string, you can
re-encode the string and check if they are the same.
require ‘digest/sha1’

class Encode
def initialize(key)
@salt= key
end

def encrypt(text)
Digest::SHA1.hexdigest("–#{@salt}–#{text}–")
end
end

e= Encode.new(“This is a very hard key.”)

pas1= e.encrypt(“This is my secret password”)
pas2= e.encrypt(“This is my secret password”)
pas3= e.encrypt(“This is NOT my secret password”)

puts(pas1 == pas2)
puts(pas2 == pas3)

3

Ben J. wrote:

I have done multiple google searches and searched the mailing list. All
of the solutions I found seemed kind of heavy / complicated. I just want
a very simple way to encrypt and decrypt a string. Something like:

encrypt(“fdsfdsfdsf”, “some key”);
decrypt(“fdsfdsfsdf”, “some key”);

Is this possible?

Thanks for your help.

If you really need to decode your strings, check:

http://crypt.rubyforge.org/installation.html

4

Hi Ben:

You can refer to the following URL for help:

http://www.andreavb.com/tip000013.html

Even though the sample code in this URL is in VB, you can modify it
using Java or any other programming language you use.

On Jun 15 2007, 8:23 am, Ben J. <rails-mailing-l…@andreas-

5

Ben J. wrote:

I have done multiple google searches and searched the mailing list. All
of the solutions I found seemed kind of heavy / complicated. I just want
a very simple way to encrypt and decrypt a string. Something like:

encrypt(“fdsfdsfdsf”, “some key”);
decrypt(“fdsfdsfsdf”, “some key”);
A quick Google for “Ruby AES encrypt” reveled several examples.

This one looks fine to me. (completely untested):
http://brentrubyrails.blogspot.com/2007/12/aes-encryption-and-decryption-in-ruby.html

6

On Jun 15 2007, 10:19 pm, Emmanuel O. <rails-mailing-l…@andreas-
s.net> wrote:

Thanks for your help.
@salt= key
pas2= e.encrypt(“This is my secret password”)
pas3= e.encrypt(“This is NOT my secret password”)

puts(pas1 == pas2)
puts(pas2 == pas3)

–
Posted viahttp://www.ruby-forum.com/.

Thank you sir,
It helped me ( or any newbe like me ) about using encryption
algorithm with rails .Its so easy to use.
sumit asok.