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Adding new fields PasswordField and IpAddressField #542
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449f4f1
Adding new fields PasswordField and IpAddressField
de6a91e
update PasswordField ; add tests
9cf22f6
update PasswordField and add PasswordHandler (to verify encrypted the…
c550c9c
update PasswordField
411da8c
fix bug
e8c1284
update doc
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,83 @@ | ||
# -*- coding: utf-8 -*- | ||
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import hashlib | ||
from fields import PasswordField | ||
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class PasswordHandler: | ||
""" | ||
Check encrypted password | ||
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Example: | ||
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bpass = PasswordHandler() | ||
is_valid = bpass.verify("sha1$e7eHHdB$7033e721c7a9ed84f7d473d99da92b00a7ca81f","sha1$e7eHHdB$7033e721c7a9ed84f7d473d99da92b00a7ca81fb") | ||
--> return is_valid=False | ||
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""" | ||
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def hexdigest(self,password): | ||
if self.algorithm == PasswordField.ALGORITHM_CRYPT: | ||
try: | ||
import crypt | ||
except ImportError: | ||
self.error("crypt module not found in this system. Please use md5 or sha* algorithm") | ||
return crypt.crypt(password, self.salt) | ||
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try: | ||
import hashlib | ||
except ImportError: | ||
self.error("hashlib module not found in this system.") | ||
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''' use sha1 algoritm ''' | ||
if self.algorithm == PasswordField.ALGORITHM_SHA1: | ||
return hashlib.sha1(self.salt + password).hexdigest() | ||
elif self.algorithm == PasswordField.ALGORITHM_MD5: | ||
return hashlib.md5(self.salt + password).hexdigest() | ||
elif self.algorithm == PasswordField.ALGORITHM_SHA256: | ||
return hashlib.sha256(self.salt + password).hexdigest() | ||
elif self.algorithm == PasswordField.ALGORITHM_SHA512: | ||
return hashlib.sha512(self.salt + password).hexdigest() | ||
raise ValueError('Unsupported hash type %s' % self.algorithm) | ||
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def encode(self, password): | ||
""" | ||
Creates an encoded password | ||
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The result is normally formatted as "algorithm$salt$hash" | ||
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""" | ||
password = self.hexdigest(password) | ||
return '%s$%s$%s' % (self.algorithm,self.salt,password) | ||
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def decode(self,encoded_password): | ||
""" | ||
Decode password | ||
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The result is normally formatted as "algorithm$salt$hash" like in the example: | ||
ha1$SgwcbaH$20f16a1fa9af6fa40d59f78fd2c247f426950e46 | ||
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""" | ||
(self.algorithm,self.salt,self.hash) = encoded_password.split(PasswordField.DOLLAR) | ||
if self.algorithm is None: | ||
raise Exception("Algorithm not found in encrypted password") | ||
if self.salt is None: | ||
raise Exception("Password salt not found in encrypted password") | ||
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def verify(self, password, encoded_password): | ||
""" | ||
Checks if the given password is correct | ||
""" | ||
self.decode(encoded_password) | ||
input_encoded_password = self.encode(password) | ||
return self._compare(encoded_password, input_encoded_password) | ||
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def _compare(self,value1,value2): | ||
""" | ||
Returns True if the two strings are equal, False otherwise. | ||
""" | ||
if len(value1) != len(value2): | ||
return False | ||
result = 0 | ||
for x, y in zip(value1, value2): | ||
result |= ord(x) ^ ord(y) | ||
return result == 0 |
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Convert to assertions