def unsecure_data(self, cred, data):
def pull_seqnum(blob):
"""Pulls initial seq_num off of blob, checks it, then returns data.
"""
# blob = seq_num + data
p.reset(blob)
try:
seq_num = p.unpack_uint()
except:
log_gss.exception("unsecure_data - unpacking seq_num")
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
if seq_num != cred.seq_num:
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
return p.get_buffer()[p.get_position():]
def check_gssapi(qop):
if qop != cred.qop:
# XXX Not sure what error to give here
log_gss.warn("unsecure_data: mismatched qop %i != %i" %
(qop, cred.qop))
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
cred = cred.body
if cred.service == rpc_gss_svc_none or \
cred.gss_proc in (RPCSEC_GSS_INIT, RPCSEC_GSS_CONTINUE_INIT):
return data
p = GSSUnpacker(data)
context = self._get_context(cred.handle)
try:
if cred.service == rpc_gss_svc_integrity:
# data = opaque[gss_seq_num+data] + opaque[checksum]
try:
data = p.unpack_opaque()
checksum = p.unpack_opaque()
p.done()
except:
log_gss.exception("unsecure_data - initial unpacking")
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
qop = context.verifyMIC(data, checksum)
check_gssapi(qop)
data = pull_seqnum(data)
elif cred.service == rpc_gss_svc_privacy:
# data = opaque[wrap([gss_seq_num+data])]
try:
data = p.unpack_opaque()
p.done()
except:
log_gss.exception("unsecure_data - initial unpacking")
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
# data, qop, conf = context.unwrap(data)
data, qop = context.unwrap(data)
check_gssapi(qop)
data = pull_seqnum(data)
else:
# Can't get here, but doesn't hurt
log_gss.error("Unknown service %i for RPCSEC_GSS" % cred.service)
except gssapi.Error as e:
log_gss.warn("unsecure_data: gssapi call returned %s" % e.name)
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
return data
def unsecure_data(self, cred, data):
def pull_seqnum(blob):
"""Pulls initial seq_num off of blob, checks it, then returns data.
"""
# blob = seq_num + data
p.reset(blob)
try:
seq_num = p.unpack_uint()
except:
log_gss.exception("unsecure_data - unpacking seq_num")
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
if seq_num != cred.seq_num:
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
return p.get_buffer()[p.get_position():]
def check_gssapi(qop):
if qop != cred.qop:
# XXX Not sure what error to give here
log_gss.warn("unsecure_data: mismatched qop %i != %i" %
(qop, cred.qop))
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
cred = cred.body
if cred.service == rpc_gss_svc_none or \
cred.gss_proc in (RPCSEC_GSS_INIT, RPCSEC_GSS_CONTINUE_INIT):
return data
p = GSSUnpacker(data)
context = self._get_context(cred.handle)
try:
if cred.service == rpc_gss_svc_integrity:
# data = opaque[gss_seq_num+data] + opaque[checksum]
try:
data = p.unpack_opaque()
checksum = p.unpack_opaque()
p.done()
except:
log_gss.exception("unsecure_data - initial unpacking")
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
qop = context.verifyMIC(data, checksum)
check_gssapi(qop)
data = pull_seqnum(data)
elif cred.service == rpc_gss_svc_privacy:
# data = opaque[wrap([gss_seq_num+data])]
try:
data = p.unpack_opaque()
p.done()
except:
log_gss.exception("unsecure_data - initial unpacking")
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
# data, qop, conf = context.unwrap(data)
data, qop = context.unwrap(data)
check_gssapi(qop)
data = pull_seqnum(data)
else:
# Can't get here, but doesn't hurt
log_gss.error("Unknown service %i for RPCSEC_GSS" %
cred.service)
except gssapi.Error, e:
log_gss.warn("unsecure_data: gssapi call returned %s" % e.name)
raise rpclib.RPCUnsuccessfulReply(GARBAGE_ARGS)
def handle_gss_init(self, cred, data, first):
p = GSSUnpacker(data)
token = p.unpack_opaque()
p.done()
log_gss.debug("***ACCEPTSECCONTEXT***")
if first:
context = gssapi.Context()
else:
context = self._get_context(cred.body.handle)
try:
token = context.accept(token)
except gssapi.Error, e:
log_gss.debug("RPCSEC_GSS_INIT failed (%s, %i)!" %
(e.name, e.minor))
res = rpc_gss_init_res('', e.major, e.minor, 0, '')
def handle_gss_init(self, cred, data, first):
p = GSSUnpacker(data)
token = p.unpack_opaque()
p.done()
log_gss.debug("***ACCEPTSECCONTEXT***")
if first:
context = gssapi.Context()
else:
context = self._get_context(cred.body.handle)
try:
token = context.accept(token)
except gssapi.Error, e:
log_gss.debug("RPCSEC_GSS_INIT failed (%s, %i)!" %
(e.name, e.minor))
res = rpc_gss_init_res('', e.major, e.minor, 0, '')
def handle_gss_init(self, cred, data, first):
p = GSSUnpacker(data)
token = p.unpack_opaque()
p.done()
log_gss.debug("***ACCEPTSECCONTEXT***")
if first:
context = gssapi.Context()
else:
context = self._get_context(cred.body.handle)
try:
token = context.accept(token)
except gssapi.Error as e:
log_gss.debug("RPCSEC_GSS_INIT failed (%s, %i)!" %
(e.name, e.minor))
res = rpc_gss_init_res('', e.major, e.minor, 0, '')
else:
log_gss.debug("RPCSEC_GSS_*INIT succeeded!")
if first:
handle = self._add_context(context)
# XXX HACK - this ensures make_reply_verf works, but
# is a subtle side-effect that could introduce bugs if code
# is ever reorganized. Currently cred is forgotten once
# we leave here though.
cred.body.rpc_gss_cred_vers_1_t.handle = handle
else:
handle = cred.body.handle
if context.open:
major = gssapi.GSS_S_COMPLETE
else:
major = gssapi.GSS_S_CONTINUE_NEEDED
res = rpc_gss_init_res(
handle,
major,
0, # XXX can't see minor
WINDOWSIZE,
token)
# Prepare response
p = GSSPacker()
p.pack_rpc_gss_init_res(res)
# NOTE this is an annoying case for make_reply_verf.
# It is the only time that you need msg_data to feed into it.
verf = self.make_reply_verf(cred, major)
raise rpclib.RPCSuccessfulReply(verf, p.get_buffer())
def handle_gss_init(self, cred, data, first):
p = GSSUnpacker(data)
token = p.unpack_opaque()
p.done()
log_gss.debug("***ACCEPTSECCONTEXT***")
if first:
context = gssapi.Context()
else:
context = self._get_context(cred.body.handle)
try:
token = context.accept(token)
except gssapi.Error as e:
log_gss.debug("RPCSEC_GSS_INIT failed (%s, %i)!" %
(e.name, e.minor))
res = rpc_gss_init_res('', e.major, e.minor, 0, '')
else:
log_gss.debug("RPCSEC_GSS_*INIT succeeded!")
if first:
handle = self._add_context(context)
# XXX HACK - this ensures make_reply_verf works, but
# is a subtle side-effect that could introduce bugs if code
# is ever reorganized. Currently cred is forgotten once
# we leave here though.
cred.body.rpc_gss_cred_vers_1_t.handle = handle
else:
handle = cred.body.handle
if context.open:
major = gssapi.GSS_S_COMPLETE
else:
major = gssapi.GSS_S_CONTINUE_NEEDED
res = rpc_gss_init_res(handle, major, 0, # XXX can't see minor
WINDOWSIZE, token)
# Prepare response
p = GSSPacker()
p.pack_rpc_gss_init_res(res)
# NOTE this is an annoying case for make_reply_verf.
# It is the only time that you need msg_data to feed into it.
verf = self.make_reply_verf(cred, major)
raise rpclib.RPCSuccessfulReply(verf, p.get_buffer())
