diff options
Diffstat (limited to 'pysnmp/proto/secmod/rfc3414/priv/des.py')
| -rw-r--r-- | pysnmp/proto/secmod/rfc3414/priv/des.py | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/pysnmp/proto/secmod/rfc3414/priv/des.py b/pysnmp/proto/secmod/rfc3414/priv/des.py index e011fd66..16b882bd 100644 --- a/pysnmp/proto/secmod/rfc3414/priv/des.py +++ b/pysnmp/proto/secmod/rfc3414/priv/des.py @@ -19,12 +19,13 @@ except ImportError: random.seed() + # 8.2.4 class Des(base.AbstractEncryptionService): - serviceID = (1, 3, 6, 1, 6, 3, 10, 1, 2, 2) # usmDESPrivProtocol + serviceID = (1, 3, 6, 1, 6, 3, 10, 1, 2, 2) # usmDESPrivProtocol if version_info < (2, 3): - _localInt = int(random.random()*0xffffffff) + _localInt = int(random.random() * 0xffffffff) else: _localInt = random.randrange(0, 0xffffffff) @@ -47,7 +48,7 @@ class Des(base.AbstractEncryptionService): raise error.ProtocolError( 'Unknown auth protocol %s' % (authProtocol,) ) - return localPrivKey[:32] # key+IV + return localPrivKey[:32] # key+IV # 8.1.1.1 def __getEncryptionKey(self, privKey, snmpEngineBoots): @@ -56,14 +57,14 @@ class Des(base.AbstractEncryptionService): securityEngineBoots = int(snmpEngineBoots) - salt = [securityEngineBoots>>24&0xff, - securityEngineBoots>>16&0xff, - securityEngineBoots>>8&0xff, - securityEngineBoots&0xff, - self._localInt>>24&0xff, - self._localInt>>16&0xff, - self._localInt>>8&0xff, - self._localInt&0xff] + salt = [securityEngineBoots >> 24 & 0xff, + securityEngineBoots >> 16 & 0xff, + securityEngineBoots >> 8 & 0xff, + securityEngineBoots & 0xff, + self._localInt >> 24 & 0xff, + self._localInt >> 16 & 0xff, + self._localInt >> 8 & 0xff, + self._localInt & 0xff] if self._localInt == 0xffffffff: self._localInt = 0 else: @@ -71,11 +72,12 @@ class Des(base.AbstractEncryptionService): return (desKey.asOctets(), univ.OctetString(salt).asOctets(), - univ.OctetString(map(lambda x, y: x^y, salt, preIV.asNumbers())).asOctets()) + univ.OctetString(map(lambda x, y: x ^ y, salt, preIV.asNumbers())).asOctets()) - def __getDecryptionKey(self, privKey, salt): + @staticmethod + def __getDecryptionKey(privKey, salt): return (privKey[:8].asOctets(), - univ.OctetString(map(lambda x, y: x^y, salt.asNumbers(), privKey[8:16].asNumbers())).asOctets()) + univ.OctetString(map(lambda x, y: x ^ y, salt.asNumbers(), privKey[8:16].asNumbers())).asOctets()) # 8.2.4.1 def encryptData(self, encryptKey, privParameters, dataToEncrypt): |