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#!/usr/bin/python
"""ECDH 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,Rand
def test():
print 'generating ec keys:'
a=EC.gen_params(EC.NID_sect233k1)
a.gen_key()
b=EC.gen_params(EC.NID_sect233k1)
b.gen_key()
a_shared_key = a.compute_dh_key(b.pub())
b_shared_key = b.compute_dh_key(a.pub())
print 'shared key according to a = ', `a_shared_key`
print 'shared key according to b = ', `b_shared_key`
if a_shared_key == b_shared_key:
print 'ok'
else:
print 'not ok'
if __name__=='__main__':
Rand.load_file('randpool.dat', -1)
test()
Rand.save_file('randpool.dat')