def test_domain1(self):
"""Verify we can generate new keys in a given domain"""
dsa_key_1 = DSA.generate(1024)
domain_params = dsa_key_1.domain()
dsa_key_2 = DSA.generate(1024, domain=domain_params)
self.assertEqual(dsa_key_1.p, dsa_key_2.p)
self.assertEqual(dsa_key_1.q, dsa_key_2.q)
self.assertEqual(dsa_key_1.g, dsa_key_2.g)
self.assertEqual(dsa_key_1.domain(), dsa_key_2.domain())
def generate_keys(bits, private, public):
key = DSA.generate(bits=bits)
with open(private, "wb") as input_file_pr:
input_file_pr.write(key.exportKey())
with open(public, "wb") as input_file_pb:
input_file_pb.write(key.publickey().exportKey())
return key, key.publickey()
from crypto.PublicKey import DSA
from crypto.Signature import DSS
from crypto.Hash import SHA256
key = DSA.generate(2048)
f = open("public_key.pem", "w")
f.write(key.publickey().export_key())
f.close()
message = b"Hello"
hash_obj = SHA256.new(message)
signer = DSS.new(key, 'fips-186-3')
signature = signer.sign(hash_obj)
f = open("public_key.pem", "r")
hash_obj = SHA256.new(message)
pub_key = DSA.import_key(f.read())
verifier = DSS.new(pub_key, 'fips-186-3')
try:
verifier.verify(hash_obj, signature)
print("The message is authentic.")
except ValueError:
print("The message is not authentic.")