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#!/usr/bin/env python
"""ECDSA demonstration.
Copyright (c) 1999-2003 Ng Pheng Siong. All rights reserved.
Portions copyright (c) 2005-2006 Vrije Universiteit Amsterdam. All rights reserved.
"""
from M2Crypto import EC, EVP, Rand
import base64
md=EVP.MessageDigest('sha1')
md.update('can you spell subliminal channel?')
dgst=md.digest()
ec=EC.load_key('ecdsatest.pem')
#ec=EC.gen_params(EC.NID_sect233k1)
#ec.gen_key()
ec_pub = ec.pub()
pub_der = ec_pub.get_der()
pub_pem = base64.encodestring(pub_der)
print 'PEM public key is',pub_pem
ec.save_key( 'ecdsatest.pem', None )
def test():
print 'testing signing...',
r,s=ec.sign_dsa(dgst)
if not ec.verify_dsa(dgst, r, s):
print 'not ok'
else:
print 'ok'
def test_asn1():
# XXX Randomly fails: bug in there somewhere... (0.9.4)
print 'testing asn1 signing...',
blob=ec.sign_dsa_asn1(dgst)
if not ec.verify_dsa_asn1(dgst, blob):
print 'not ok'
else:
print 'ok'
def speed():
from time import time
N1 = 5242
N2 = 2621
t1 = time()
for i in range(N1):
r,s = ec.sign(dgst)
print '%d signings: %8.2fs' % (N1, (time() - t1))
t1 = time()
for i in range(N2):
ec.verify(dgst, r, s)
print '%d verifications: %8.2fs' % (N2, (time() - t1))
def test_speed():
print 'measuring speed...'
import profile
profile.run('speed()')
if __name__=='__main__':
Rand.load_file('randpool.dat', -1)
test()
test_asn1()
#test_speed()
Rand.save_file('randpool.dat')
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