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 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 verify_chain_HMAC(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:
print "verify failed"
return 0
for d, v in chain[1:]:
hmac.reset(digest)
hmac.update(` v `)
digest = hmac.final()
if digest != d:
print "verify failed"
return 0
print "ok"
return 1