def write_signature(output, ):
# calls si.signature
# outputs a signature to output
with open(output, 'w') as outfh:
fig = si.signature(target_name, primary_compounds,
nonprimary_compounds, cell_lines)
outfh.write(fig)
def write_signature(output, ):
# calls si.signature
# outputs a signature to output
with open(output, 'w') as outfh:
fig = si.signature(target_name, primary_compounds,
nonprimary_compounds, cell_lines)
outfh.write(fig)
def verify_sign(self,message,sign):
try:
if type(sign) == type(""):
j = serializer.loads(sign)
else:
j = sign
keyindex = 1
for key in self.keys:
signer = signature.signature(key.get_publickey())
if j.has_key(keyindex):
sig = j[keyindex]
elif j.has_key(str(keyindex)):
sig = j[str(keyindex)]
else:
return False
if not signer.verify(sig,message):
return False
keyindex += 1
except Exception,e:
log.warning("Failed verifying a sign, returning False. More details: %s",e)
print "Error: %s" % e
return False
def do_sign(self,message,raw=True):
# 通用的签名方法
if not self.is_ours:
raise Exception("This is not a private certificate that can be used for signing.")
ret = {}
keyindex = 1
for key in self.keys:
signer = signature.signature(key.get_privatekey())
signlimit = key.sign_limit()
hashalgo = Hash().consult(signlimit)
if len(hashalgo) < 1:
raise Exception("No suitable hash functions found.")
maxhash = hashalgo[max(hashalgo.keys())]
choosenalgo = maxhash[random.randint(0,len(maxhash) - 1)]
sig = signer.new(message,choosenalgo,raw) # XXX 安全泄漏。应当考虑一种提供选择的方法
ret[str(keyindex)] = sig
keyindex += 1
if raw:
return ret
else:
return serializer.dumps(ret)
log.info("Successfully made a sign.")
def test_signature_py2(f, sig):
assert signature(f) == sig, sig
def main():
"""
DISTRIBUTE KEY
"""
print "########## DISTRIBUTE KEY #################"
# GIVE ALICE A KEY ... init with none key
alice = elgamal()
alice.create_key(10)
# GIVE BOB KEY . .other init with 10 bits key
bob = elgamal(10)
print "ALICE:\n", alice
print "BOB:\n", bob
print "################################"
"""
END DISTRIBUTE KEY
"""
##########################################################################################################
"""
ALICE'S TASK
"""
print "########## ALICE's task ###########"
# ALICE have a text
text = "hello bob"
print "TEXT: ", text
# ALICE use public_key of BOB to encrypt that text
cipher = bob.encrypt(text)
#print "CIPHER: \n", cipher
# give ALICE a pen
alice_pen = signature(alice.private_key)
#print alice_pen
# create signature with ALICE's pen
sig_of_alice = alice_pen.sign(text)
#print "SIGNATURE: \n", sig
### alice send a pair contain cipher and her signature to bob
pair = [cipher, sig_of_alice]
print "PAIR[cipher, signature]: \n", pair
print "################################"
"""
END ALICE'S TASK
"""
############################################################################################################
"""
DARTH'S TASK
"""
print "###### DARTH's task ###################"
# DARTH have public_key of bob. He find private key
darth = attack()
k = darth.find_private_key(bob.public_key)
print "DARTH found private key is: ", k
pr = [bob.public_key[0], bob.public_key[1], k] # pr = [p, q, k]
darth_crypto = elgamal()
darth_crypto.set_key([],pr) ### darth only need private key to decrypt cipher
print "Darth try to decrypt: ", darth_crypto.decrypt(pair[0])
print "HAHAHAHAHAHAHA :)"
print "################################"
"""
DARTH'S TASK
"""
############################################################################################################
"""
BOB'S TASK
"""
print "########### BOB's task ###############"
###########bob receive the pair. bob take a accuracy of alice's signature
ca_alice = verification(alice.public_key)
t_text = bob.decrypt(cipher)
print "BOB decrypt: ", t_text
print "VERIFY: " ,ca_alice.verify(t_text,pair[1])
"""
def test_signature_py3(f, sig):
s = signature(f)
assert s == sig, s
