RSA key gen, encrypt/decrypt, and sign/verify with PyCrypto

rsa_example.py

# using pycrypto (2.3)
from Crypto.PublicKey import RSA


# generate(self, bits, randfunc=None, progress_func=None) method of Crypto.PublicKey.RSA.RSAImplementation instance
new_key = RSA.generate(bits=2048)

# exportKey(self, format='PEM') method of Crypto.PublicKey.RSA._RSAobj instance
# Export the RSA key. A string is returned
# with the encoded public or the private half
# under the selected format.
# 
# format:         'DER' (PKCS#1) or 'PEM' (RFC1421)
public_key = new_key.publickey().exportKey("PEM")
private_key = new_key.exportKey("PEM")

tpl = new_key.encrypt('ninovsnino', 12345670)
print new_key.decrypt(tpl[0]) # 'ninovsnino'

tpl = new_key.sign('ninovsnino', 01234567)
print new_key.verify('ninovsnino', tpl) # True