Re: [PHP] SHA-1 + RSA + base64

[Jason Sheets]

I'm not sure why you would want to encrypt a hash of a string, a hash 
(sha1) is already non reversible and you also do not need to 
base64_encode a sha1 hash (try <?php print sha1('hello'); ?>)..

If you want to do RSA public key encryption you will need to use an 
external application such as gpg or pgp.

Also please note if you are intending to encode the plain text three 
different ways you are exposing yourself with base64, base64 is not an 
encryption technique.

The way I understand your question is data -> sha1 -> rsa -> 
base64_encode but it could also be

data -> sha1
data -> rsa
data -> base64
The latter is not secure because you are using base64 which is not even 
trivial to decode.

Jason

Veniamin Goldin wrote:

Hi all,

I need some help,

I have a request to encode string with SHA-1, then with RSA and at the
end with base64,
There no problems with SHA-1 and base64, but i can't find any
functions to encode using RSA.
md5 seems to be not what I'm looking for.

I heard also, that there should be special function, that makes SHA-1
+ RSA at once.


Help please.

 



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