rsa.py

import re
import os

file = open("/home/agaust/rsa.txt")

key_start = re.compile("-----BEGIN RSA PRIVATE KEY-----")
key_end = re.compile("-----END RSA PRIVATE KEY-----")

def re_range(f, key_start, key_end) :
    for line in f:
        if key_start.match(line):
            yield line
            break
    for line in f:
        yield line
        if key_end.match(line):
            break

first_key = ''
for line in re_range(file, key_start, key_end):
    first_key += line

dest = '/home/agaust/ssl'

if not os.path.exists(dest):
    os.makedirs(dest)

if not os.path.exists(dest+'/rsa-new.txt'):
    ssl_key = open('/home/agaust/rsa-new.txt', 'w')
    ssl_key.write(first_key)
    ssl_key.close()