def test_get_fingerprint(self):
"""
Creates a new ThresholdEncryptionSetUp and generate commitments for
all trustees add them to the ThresholdEncryptionSetUp
an get a fingerpint
"""
cryptosystem = get_cryptosystem()
commitments = []
# Generate a new instance of ThresholdEncryptionSetUp
tSetUp = ThresholdEncryptionSetUp(cryptosystem, self.num_trustees,
self.threshold)
# Adding the keys from trustees
for i in range(self.num_trustees):
tSetUp.add_trustee_public_key(i, self.trustees[i].public_key)
# Generate commitmes for trustees
for i in range(self.num_trustees):
commitments.append(tSetUp.generate_commitment())
# get_fingerprint must raise ThresholdEncryptionSetUpStateError
# if called without added commitments
self.assertRaises(ThresholdEncryptionSetUpStateError,
tSetUp.get_fingerprint)
# Adding the first self.num_trustees - 1 commitments from trustees
for i in range(self.num_trustees - 1):
tSetUp.add_trustee_commitment(i, commitments[i])
# get_fingerprint must raise ThresholdEncryptionSetUpStateError
# if called without all added commitments
self.assertRaises(ThresholdEncryptionSetUpStateError,
tSetUp.get_fingerprint)
# Add the last commitments from trustees
tSetUp.add_trustee_commitment(self.num_trustees - 1,
commitments[self.num_trustees - 1])
# Create 2 fingerpints and they must match
fingerprint = tSetUp.get_fingerprint()
fingerprintb = tSetUp.get_fingerprint()
self.assertEquals(fingerprint, fingerprintb)
# We create a diferent ThresholdEncryptionSetUp to genera another
# fingerprint that should not match
tSetUp2 = ThresholdEncryptionSetUp(cryptosystem, self.num_trustees - 1,
self.threshold - 1)
for i in range(self.num_trustees - 1):
tSetUp2.add_trustee_public_key(i, self.trustees[i].public_key)
commitments2 = []
for i in range(self.num_trustees - 1):
commitments2.append(tSetUp2.generate_commitment())
for i in range(self.num_trustees - 1):
tSetUp2.add_trustee_commitment(i, commitments2[i])
fingerprint2 = tSetUp2.get_fingerprint()
# figerprints generate from diferent ThresholdEncryptionSetUp
# must be diferent
self.assertNotEqual(fingerprint, fingerprint2)
def test_get_fingerprint(self):
"""
Creates a new ThresholdEncryptionSetUp and generate commitments for
all trustees add them to the ThresholdEncryptionSetUp
an get a fingerpint
"""
cryptosystem = get_cryptosystem()
commitments = []
# Generate a new instance of ThresholdEncryptionSetUp
tSetUp = ThresholdEncryptionSetUp(cryptosystem,
self.num_trustees, self.threshold)
# Adding the keys from trustees
for i in range(self.num_trustees):
tSetUp.add_trustee_public_key(i, self.trustees[i].public_key)
# Generate commitmes for trustees
for i in range(self.num_trustees):
commitments.append(tSetUp.generate_commitment())
# get_fingerprint must raise ThresholdEncryptionSetUpStateError
# if called without added commitments
self.assertRaises(ThresholdEncryptionSetUpStateError,
tSetUp.get_fingerprint)
# Adding the first self.num_trustees - 1 commitments from trustees
for i in range(self.num_trustees - 1):
tSetUp.add_trustee_commitment(i, commitments[i])
# get_fingerprint must raise ThresholdEncryptionSetUpStateError
# if called without all added commitments
self.assertRaises(ThresholdEncryptionSetUpStateError,
tSetUp.get_fingerprint)
# Add the last commitments from trustees
tSetUp.add_trustee_commitment(self.num_trustees - 1,
commitments[self.num_trustees - 1])
# Create 2 fingerpints and they must match
fingerprint = tSetUp.get_fingerprint()
fingerprintb = tSetUp.get_fingerprint()
self.assertEquals(fingerprint,fingerprintb)
# We create a diferent ThresholdEncryptionSetUp to genera another
# fingerprint that should not match
tSetUp2 = ThresholdEncryptionSetUp(cryptosystem,
self.num_trustees-1, self.threshold-1)
for i in range(self.num_trustees-1):
tSetUp2.add_trustee_public_key(i, self.trustees[i].public_key)
commitments2 = []
for i in range(self.num_trustees-1):
commitments2.append(tSetUp2.generate_commitment())
for i in range(self.num_trustees - 1):
tSetUp2.add_trustee_commitment(i, commitments2[i])
fingerprint2 = tSetUp2.get_fingerprint()
# figerprints generate from diferent ThresholdEncryptionSetUp
# must be diferent
self.assertNotEqual(fingerprint,fingerprint2)
