def strenc(data, firstkey, secondkey, thirdKey):
bts_data = extend_to_16bits(data)
bts_firstkey = extend_to_16bits(firstkey)
bts_secondkey = extend_to_16bits(secondkey)
bts_thirdkey = extend_to_16bits(thirdKey)
i = 0
bts_result = []
while i < len(bts_data):
bts_temp = bts_data[i:i + 8] # 将data分成每64位一段，分段加密
j, k, z = 0, 0, 0
while j < len(bts_firstkey):
des_k = pyDes.des(bts_firstkey[j:j + 8],
pyDes.ECB) # 分别取出 first_key 的64位作为密钥
bts_temp = list(des_k.encrypt(bts_temp))
j += 8
while k < len(bts_secondkey):
des_k = pyDes.des(bts_secondkey[k:k + 8],
pyDes.ECB) # 分别取出 second_key 的64位作为密钥
bts_temp = list(des_k.encrypt(bts_temp))
k += 8
while z < len(bts_thirdkey):
des_k = pyDes.des(bts_thirdkey[z:z + 8],
pyDes.ECB) # 分别取出 second_key 的64位作为密钥
bts_temp = list(des_k.encrypt(bts_temp))
z += 8
bts_result.extend(bts_temp)
i += 8
str_result = ''
for each in bts_result:
str_result += '%02X' % each # 分别加密data的各段，串联成字符串
return str_result
def generateChallengeResponseV1(password,
server_challenge,
has_extended_security=False,
client_challenge=None):
"""
Generate a NTLMv1 response
@param password: User password string
@param server_challange: A 8-byte challenge string sent from the server
@param has_extended_security: A boolean value indicating whether NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY flag is enabled in the NTLM negFlag
@param client_challenge: A 8-byte string representing client challenge. If None, it will be generated randomly if needed by the response generation
@return: a tuple of ( NT challenge response string, LM challenge response string )
References:
===========
- http://ubiqx.org/cifs/SMB.html (2.8.3.3 and 2.8.3.4)
- [MS-NLMP]: 3.3.1
"""
_password = (password.upper() + '\0' * 14)[:14]
d1 = des(expandDesKey(_password[:7]))
d2 = des(expandDesKey(_password[7:]))
lm_response_key = d1.encrypt("KGS!@#$%") + d2.encrypt(
"KGS!@#$%"
) # LM password hash. In [MS-NLMP], this is the result of LMOWFv1 function
d = MD4()
d.update(password.encode('UTF-16LE'))
nt_response_key = d.digest(
) # In [MS-NLMP], this is the result of NTOWFv1 function
if has_extended_security:
if not client_challenge:
client_challenge = ''
for i in range(0, 8):
client_challenge += chr(random.getrandbits(8))
assert len(client_challenge) == 8
lm_challenge_response = client_challenge + '\0' * 16
nt_challenge_response = DESL(
nt_response_key,
MD5(server_challenge + client_challenge).digest()[0:8])
else:
nt_challenge_response = DESL(
nt_response_key,
server_challenge) # The result after DESL is the NT response
lm_challenge_response = DESL(
lm_response_key,
server_challenge) # The result after DESL is the LM response
d = MD4()
d.update(nt_response_key)
session_key = d.digest()
return nt_challenge_response, lm_challenge_response, session_key
def DESL(K, D):
"""
References:
===========
- http://ubiqx.org/cifs/SMB.html (2.8.3.4)
- [MS-NLMP]: Section 6
"""
d1 = des(expandDesKey(K[0:7]))
d2 = des(expandDesKey(K[7:14]))
d3 = des(expandDesKey(K[14:16] + "\0" * 5))
return d1.encrypt(D) + d2.encrypt(D) + d3.encrypt(D)
def DESL(K, D):
"""
References:
===========
- http://ubiqx.org/cifs/SMB.html (2.8.3.4)
- [MS-NLMP]: Section 6
"""
d1 = des(expandDesKey(K[0:7]))
d2 = des(expandDesKey(K[7:14]))
d3 = des(expandDesKey(K[14:16] + '\0' * 5))
return d1.encrypt(D) + d2.encrypt(D) + d3.encrypt(D)
def generateChallengeResponseV1(password, server_challenge, has_extended_security=False, client_challenge=None):
"""
Generate a NTLMv1 response
@param password: User password string
@param server_challange: A 8-byte challenge string sent from the server
@param has_extended_security: A boolean value indicating whether NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY flag is enabled in the NTLM negFlag
@param client_challenge: A 8-byte string representing client challenge. If None, it will be generated randomly if needed by the response generation
@return: a tuple of ( NT challenge response string, LM challenge response string )
References:
===========
- http://ubiqx.org/cifs/SMB.html (2.8.3.3 and 2.8.3.4)
- [MS-NLMP]: 3.3.1
"""
_password = (password.upper() + "\0" * 14)[:14]
d1 = des(expandDesKey(_password[:7]))
d2 = des(expandDesKey(_password[7:]))
lm_response_key = d1.encrypt("KGS!@#$%") + d2.encrypt(
"KGS!@#$%"
) # LM password hash. In [MS-NLMP], this is the result of LMOWFv1 function
d = MD4()
d.update(password.encode("UTF-16LE"))
nt_response_key = d.digest() # In [MS-NLMP], this is the result of NTOWFv1 function
if has_extended_security:
if not client_challenge:
client_challenge = ""
for i in range(0, 8):
client_challenge += chr(random.getrandbits(8))
assert len(client_challenge) == 8
lm_challenge_response = client_challenge + "\0" * 16
nt_challenge_response = DESL(nt_response_key, MD5(server_challenge + client_challenge).digest()[0:8])
else:
nt_challenge_response = DESL(nt_response_key, server_challenge) # The result after DESL is the NT response
lm_challenge_response = DESL(lm_response_key, server_challenge) # The result after DESL is the LM response
d = MD4()
d.update(nt_response_key)
session_key = d.digest()
return nt_challenge_response, lm_challenge_response, session_key
