Passing Encryption/Decryption Keys from Python to PHP?

Question

I am using Python Pycrypto Module to generate RSA key pair:

#!/home/user/Desktop/generate_keys.py

from Crypto.PublicKey import RSA
from Crypto import Random

random_generator = Random.new().read
key = RSA.generate(1024,random_generator)
public_key = key.publickey().exportKey()               #export public key
private_key = key.exportKey()                          #export private key

print(public_key)
print(private_key)

What I need to do is run the script in Python and passing both of the keys to PHP which stores it in database. I am trying to do pass the variable through executing the python script in shell then taking the output in PHP.

<?php

   $command = escapeshellcmd('python3 generate_keys.py');
   $public_key = shell_exec($command);
   echo $public_key;

?>

The problem here is I do not understand how to pass variables from Python to PHP, All I am doing is taking the output of one python script into PHP.

If I try to do it in two separate scripts of Python:

for Public Key:

from Crypto.PublicKey import RSA
from Crypto import Random

random_generator = Random.new().read
key = RSA.generate(1024,random_generator)

print(key.publickey().exportKey())

for Private Key:

from Crypto.PublicKey import RSA
from Crypto import Random

random_generator = Random.new().read
key = RSA.generate(1024,random_generator)

print(key.exportKey())

I will get a different key pair each time I run those random_generator.

How Can I pass variables of Python ('public_key' & 'private_key') to PHP variables?

I have checked some answers about passing variables from python to php and vice-versa but I did not understand. If the communication between php, python and shell can be optimised please inform me. Thank You!

I think stackoverflow.com/questions/5497540/… showed how to call python from php (php.net/manual/en/function.system.php) and get all return values. — Eich
– Eich, Commented Jan 14, 2016 at 11:07

Headhunter Xamd · Accepted Answer · 2016-01-14 11:24:08Z

1

You were almost there ;) you can always combine the 2 keys into one string with a delimiter inbetween.

#!/home/user/Desktop/generate_keys.py

from Crypto.PublicKey import RSA
from Crypto import Random

random_generator = Random.new().read
key = RSA.generate(1024,random_generator)
public_key = key.publickey().exportKey()               #export public key
private_key = key.exportKey()                          #export private key

data = public_key + "||" + private_key
print(data)

so when you receive the data in php you can just use explode(delimiter, string) .

<?php

   $command = escapeshellcmd('python3 generate_keys.py');
   $keys = shell_exec($command);
   $splitted_keys = explode("||", $keys);
   echo $splitted_keys[0];

?>

answered Jan 14, 2016 at 11:24

Headhunter Xamd

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2 Comments

Manuj Mittal Over a year ago

Thank You that solved my problem xD But Can you tell me some way to pass variables in between them ?

Headhunter Xamd Over a year ago

you can always use the command line arguments to communicate with python. sys.argv is an array of items grabbed from the cmd after python3. (read the link, it has a more comprehensive explanation)

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