def _dnskey_to_dsa(key):
# get T
t, = struct.unpack(b'B', key[0])
offset = 1
# get Q
new_offset = offset + 20
q = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get P
new_offset = offset + 64 + (t << 3)
p = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get G
new_offset = offset + 64 + (t << 3)
g = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get Y
new_offset = offset + 64 + (t << 3)
y = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# create the DSA public key
return DSA.pub_key_from_params(p, q, g, y)
def _dnskey_to_dsa(key):
# get T
t = key[0]
# python3/python2 dual compatibility
if not isinstance(t, int):
t = ord(t)
offset = 1
# get Q
new_offset = offset + 20
q = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get P
new_offset = offset + 64 + (t << 3)
p = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get G
new_offset = offset + 64 + (t << 3)
g = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get Y
new_offset = offset + 64 + (t << 3)
y = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# create the DSA public key
return DSA.pub_key_from_params(p, q, g, y)
def _dnskey_to_dsa(key):
# get T
t, = struct.unpack(b'B',key[0])
offset = 1
# get Q
new_offset = offset+20
q = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get P
new_offset = offset+64+(t<<3)
p = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get G
new_offset = offset+64+(t<<3)
g = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# get Y
new_offset = offset+64+(t<<3)
y = bn_to_mpi(hex_to_bn(binascii.hexlify(key[offset:new_offset])))
offset = new_offset
# create the DSA public key
return DSA.pub_key_from_params(p,q,g,y)
def test_pub_key_from_params(self):
dsa = DSA.gen_params(1024, self.callback)
dsa.gen_key()
assert len(dsa) == 1024
p = dsa.p
q = dsa.q
g = dsa.g
pub = dsa.pub
dsa2 = DSA.pub_key_from_params(p, q, g, pub)
assert dsa2.check_key()
r, s = dsa.sign(self.data)
assert dsa2.verify(self.data, r, s)
def test_pub_key_from_params(self):
dsa = DSA.gen_params(1024, self.callback)
dsa.gen_key()
assert len(dsa) == 1024
p = dsa.p
q = dsa.q
g = dsa.g
pub = dsa.pub
dsa2 = DSA.pub_key_from_params(p,q,g,pub)
assert dsa2.check_key()
r,s = dsa.sign(self.data)
assert dsa2.verify(self.data, r, s)
def _dnskey_to_dsa(key):
# get T
t, = struct.unpack(b'B', key[0])
offset = 1
# get Q
new_offset = offset + 20
q = b''
for c in key[offset:new_offset]:
q += b'%02x' % struct.unpack(b'B', c)[0]
q = bn_to_mpi(hex_to_bn(q))
offset = new_offset
# get P
new_offset = offset + 64 + (t << 3)
p = b''
for c in key[offset:new_offset]:
p += b'%02x' % struct.unpack(b'B', c)[0]
p = bn_to_mpi(hex_to_bn(p))
offset = new_offset
# get G
new_offset = offset + 64 + (t << 3)
g = b''
for c in key[offset:new_offset]:
g += b'%02x' % struct.unpack(b'B', c)[0]
g = bn_to_mpi(hex_to_bn(g))
offset = new_offset
# get Y
new_offset = offset + 64 + (t << 3)
y = b''
for c in key[offset:new_offset]:
y += b'%02x' % struct.unpack(b'B', c)[0]
y = bn_to_mpi(hex_to_bn(y))
offset = new_offset
# create the DSA public key
return DSA.pub_key_from_params(p, q, g, y)
def _dnskey_to_dsa(key):
# get T
t, = struct.unpack(b'B',key[0])
offset = 1
# get Q
new_offset = offset+20
q = b''
for c in key[offset:new_offset]:
q += b'%02x' % struct.unpack(b'B',c)[0]
q = bn_to_mpi(hex_to_bn(q))
offset = new_offset
# get P
new_offset = offset+64+(t<<3)
p = b''
for c in key[offset:new_offset]:
p += b'%02x' % struct.unpack(b'B',c)[0]
p = bn_to_mpi(hex_to_bn(p))
offset = new_offset
# get G
new_offset = offset+64+(t<<3)
g = b''
for c in key[offset:new_offset]:
g += b'%02x' % struct.unpack(b'B',c)[0]
g = bn_to_mpi(hex_to_bn(g))
offset = new_offset
# get Y
new_offset = offset+64+(t<<3)
y = b''
for c in key[offset:new_offset]:
y += b'%02x' % struct.unpack(b'B',c)[0]
y = bn_to_mpi(hex_to_bn(y))
offset = new_offset
# create the DSA public key
return DSA.pub_key_from_params(p,q,g,y)