alphanumeric encrypt/decrypt

[Ruby Facet]

Hello,

Is there an encryption (decryption) routine that will return only
alphanumeric characters? Looking forward to your help.

RF

 

[Gregory Brown]

Hello,

Is there an encryption (decryption) routine that will return only
alphanumeric characters? Looking forward to your help.

You could take any old routine and pack / unpack it as hex. Would
that do the trick?

unpacked = "non-alpha numeric stuff: ^#%# foas".unpack("H*") => ["6e6f6e2d616c706861206e756d657269632073747566663a205e23252320666f6173"]
unpacked.pack("H*")

=> "non-alpha numeric stuff: ^#%# foas"

-greg

 

[Ruby Facet]

Greg, Thanks for the pack hack. I am using it for file names and the
pack output is a little too long. I will look for other solutions, but
that does the trick.

 

[Gregory Brown]

Greg, Thanks for the pack hack. I am using it for file names and the
pack output is a little too long. I will look for other solutions, but
that does the trick.

Is there any reason you need to decrypt the filenames? If not, you
could use something like SHA.

-greg

 

[Todd Benson]

Hello,

Is there an encryption (decryption) routine that will return only
alphanumeric characters? Looking forward to your help.

RF

s = 'aoa3(;12)>,$!'
.pack('m').chomp

=> "YW9hMyg71mwyKT4sJC="

I haven't read the RFC for base64, but it looks like you would then
need to allow the '=' symbol along with letters and numbers, but no
other special characters besides that. Perhaps '=' is a padding
character.

cheers,
Todd

 

[Ruby Facet]

Todd, thank you. I think that will work for me. Just to note that we
can't remove one '=' in encrypt and add one in decrypt, the number of
'=' could vary.

s = '1231243234232';
.pack('m')

=> "MTIzMTI0MzIzNDIzMg==\n"

Hello,

Is there an encryption (decryption) routine that will return only
alphanumeric characters? Looking forward to your help.

RF

s = 'aoa3(;12)>,$!'
.pack('m').chomp

=> "YW9hMyg71mwyKT4sJC="

I haven't read the RFC for base64, but it looks like you would then
need to allow the '=' symbol along with letters and numbers, but no
other special characters besides that. Perhaps '=' is a padding
character.

cheers,
Todd

 

[Ruby Facet]

Greg, Since I am using it for file names, I thought if the cipher is
both way, I am guaranteed to not get collisions. Actually I don't use
decryption.

 

[Todd Benson]

Greg, Since I am using it for file names, I thought if the cipher is
both way, I am guaranteed to not get collisions. Actually I don't use
decryption.

If it's one way...

my_string.hash #for a number

...or...

my_string.crypt(my_seed_string)

Todd