def calcMAC_3d(self, s):
""" Pad string and calculate MAC according to B.1.2.1 - Full 3DES """
e = DES3.new(self.ses_ENC, DES.MODE_ECB)
s = pad80(s, 8)
q = len(s) / 8
h = ZERO8
for i in xrange(q):
h = e.encrypt(bxor(h, s[8 * i:8 * (i + 1)]))
return h
def calcMAC_3d( self, s ):
""" Pad string and calculate MAC according to B.1.2.1 - Full 3DES """
e = DES3.new( self.ses_ENC, DES.MODE_ECB )
s = pad80( s )
q = len( s ) / 8
h = ZERO8
for i in xrange(q):
h = e.encrypt( bxor( h, s[8*i:8*(i+1)] ))
return h
def calc(self, s):
" Pad string and calculate MAC according to B.1.2.2 - " +\
"Single DES plus final 3DES """
s = pad80(s, 8)
q = len(s) / 8
h = '\0' * 8 # zero ICV
for i in xrange(q):
h = self.e.encrypt(bxor(h, s[8 * i:8 * (i + 1)]))
h = self.d.decrypt(h)
h = self.e.encrypt(h)
return h
def calcMAC_1d(self, s, zResetICV=False):
" Pad string and calculate MAC according to B.1.2.2 - " +\
"Single DES plus final 3DES """
e = DES.new(self.ses_C_MAC[:8], DES.MODE_ECB)
d = DES.new(self.ses_C_MAC[8:], DES.MODE_ECB)
s = pad80(s, 8)
q = len(s) / 8
h = zResetICV and ZERO8 or self.icv
for i in xrange(q):
h = e.encrypt(bxor(h, s[8 * i:8 * (i + 1)]))
h = d.decrypt(h)
h = e.encrypt(h)
self.icv = (self.i & M_ICV_ENC) and self.k_icv.encrypt(h) or h
return h
def calcMAC_1d( self, s, zResetICV = False ):
" Pad string and calculate MAC according to B.1.2.2 - " +\
"Single DES plus final 3DES """
e = DES.new( self.ses_C_MAC[:8], DES.MODE_ECB )
d = DES.new( self.ses_C_MAC[8:], DES.MODE_ECB )
s = pad80( s )
q = len( s ) / 8
h = zResetICV and ZERO8 or self.icv
for i in xrange(q):
h = e.encrypt( bxor( h, s[8*i:8*(i+1)] ))
h = d.decrypt( h )
h = e.encrypt( h )
self.icv = ( self.i & M_ICV_ENC ) and self.k_icv.encrypt( h ) or h
return h
