def test_simple(self):
algo = 'sha1'
for d in self.data:
h = EVP.HMAC(d[0], algo)
h.update(d[1])
ret = h.final()
self.assertEqual(ret, d[2])
with self.assertRaises(ValueError):
EVP.HMAC(d[0], algo='nosuchalgo')
def make_chain_HMAC(self, key, start, input, algo='sha1'):
chain = []
hmac = EVP.HMAC(key, algo)
hmac.update( ` start `)
digest = hmac.final()
chain.append((digest, start))
for i in input:
hmac.reset(digest)
hmac.update( ` i `)
digest = hmac.final()
chain.append((digest, i))
return chain
def verify_chain_HMAC(self, key, start, chain, algo='sha1'):
hmac = EVP.HMAC(key, algo)
hmac.update( ` start `)
digest = hmac.final()
c = chain[0]
if c[0] != digest or c[1] != start:
return 0
for d, v in chain[1:]:
hmac.reset(digest)
hmac.update( ` v `)
digest = hmac.final()
if digest != d:
return 0
return 1
def HMAC(self, *data):
hmac = EVP.HMAC(self.cipher.hmac_key, algo="sha1")
for d in data:
hmac.update(d)
return hmac.final()
def HMAC(self, data):
hmac = EVP.HMAC(self.cipher.hmac_key, algo="sha1")
hmac.update(data)
return hmac.final()
