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|
GSSAPI="BASE" # This ensures that a full module is generated by Cython
from libc.stdlib cimport free
from gssapi.raw.cython_types cimport *
from gssapi.raw.cython_converters cimport c_py_ttl_to_c, c_c_ttl_to_py
from gssapi.raw.creds cimport Creds
from gssapi.raw.names cimport Name
from gssapi.raw.oids cimport OID
from gssapi.raw.chan_bindings cimport ChannelBindings
from gssapi.raw.types import MechType, RequirementFlag, IntEnumFlagSet
from gssapi.raw.misc import GSSError
from gssapi.raw.named_tuples import AcceptSecContextResult
from gssapi.raw.named_tuples import InitSecContextResult
from gssapi.raw.named_tuples import InquireContextResult
cdef extern from "python_gssapi.h":
OM_uint32 gss_init_sec_context(OM_uint32 *min_stat,
const gss_cred_id_t initiator_creds,
gss_ctx_id_t *context,
const gss_name_t target_name,
const gss_OID mech_type,
OM_uint32 flags,
OM_uint32 ttl,
const gss_channel_bindings_t chan_bdgs,
const gss_buffer_t input_token,
gss_OID *actual_mech_type,
gss_buffer_t output_token,
OM_uint32 *actual_flags,
OM_uint32 *actual_ttl) nogil
OM_uint32 gss_accept_sec_context(OM_uint32 *min_stat,
gss_ctx_id_t *context,
const gss_cred_id_t acceptor_creds,
const gss_buffer_t input_token,
const gss_channel_bindings_t chan_bdgs,
const gss_name_t *initiator_name,
gss_OID *mech_type,
gss_buffer_t output_token,
OM_uint32 *flags,
OM_uint32 *ttl,
gss_cred_id_t *delegated_creds) nogil
OM_uint32 gss_delete_sec_context(OM_uint32 *min_stat,
gss_ctx_id_t *context,
gss_buffer_t output_token) nogil
OM_uint32 gss_process_context_token(OM_uint32 *min_stat,
const gss_ctx_id_t context,
const gss_buffer_t token) nogil
OM_uint32 gss_context_time(OM_uint32 *min_stat,
const gss_ctx_id_t context_handle,
OM_uint32 *ttl) nogil
OM_uint32 gss_inquire_context(OM_uint32 *min_stat,
const gss_ctx_id_t context,
gss_name_t *initiator_name,
gss_name_t *target_name,
OM_uint32 *ttl,
gss_OID *mech_type,
OM_uint32 *ctx_flags,
int *locally_initiated,
int *is_open) nogil
OM_uint32 gss_export_sec_context(OM_uint32 *min_stat,
gss_ctx_id_t *context,
gss_buffer_t interprocess_token) nogil
OM_uint32 gss_import_sec_context(OM_uint32 *min_stat,
const gss_buffer_t interprocess_token,
gss_ctx_id_t *context) nogil
cdef class SecurityContext:
# defined in pxd
# cdef gss_ctx_id_t raw_ctx
def __cinit__(self, SecurityContext cpy=None):
if cpy is not None:
self.raw_ctx = cpy.raw_ctx
cpy.raw_ctx = GSS_C_NO_CONTEXT
else:
self.raw_ctx = GSS_C_NO_CONTEXT
property _started:
"""Whether the underlying context is NULL."""
def __get__(self):
return self.raw_ctx is not NULL
def __dealloc__(self):
# basically just deleteSecContext, but we are not
# allowed to call methods here
cdef OM_uint32 maj_stat, min_stat
if self.raw_ctx is not GSS_C_NO_CONTEXT:
# local deletion only
maj_stat = gss_delete_sec_context(&min_stat, &self.raw_ctx,
GSS_C_NO_BUFFER)
if maj_stat != GSS_S_COMPLETE:
raise GSSError(maj_stat, min_stat)
self.raw_ctx = NULL
# TODO(directxman12): figure out whether GSS_C_NO_NAME can be passed in here
def init_sec_context(Name target_name not None, Creds creds=None,
SecurityContext context=None,
OID mech=None,
flags=None, lifetime=None,
ChannelBindings channel_bindings=None,
input_token=None):
cdef gss_OID mech_oid
if mech is not None:
mech_oid = &mech.raw_oid
else:
mech_oid = GSS_C_NO_OID
# TODO(directxman12): should we default to this?
cdef OM_uint32 req_flags = IntEnumFlagSet(RequirementFlag, flags or [
RequirementFlag.mutual_authentication,
RequirementFlag.out_of_sequence_detection])
cdef gss_channel_bindings_t bdng
if channel_bindings is not None:
bdng = channel_bindings.__cvalue__()
else:
bdng = GSS_C_NO_CHANNEL_BINDINGS
cdef gss_buffer_desc input_token_buffer = gss_buffer_desc(0, NULL)
cdef OM_uint32 input_ttl = c_py_ttl_to_c(lifetime)
cdef SecurityContext output_context = context
if output_context is None:
output_context = SecurityContext()
cdef gss_cred_id_t act_cred
if creds is not None:
act_cred = creds.raw_creds
else:
act_cred = GSS_C_NO_CREDENTIAL
if input_token is not None:
input_token_buffer.value = input_token
input_token_buffer.length = len(input_token)
cdef gss_OID actual_mech_type = GSS_C_NO_OID
cdef gss_buffer_desc output_token_buffer = gss_buffer_desc(0, NULL)
cdef OM_uint32 ret_flags
cdef OM_uint32 output_ttl
cdef OM_uint32 maj_stat, min_stat
with nogil:
maj_stat = gss_init_sec_context(&min_stat, act_cred,
&output_context.raw_ctx,
target_name.raw_name,
mech_oid, req_flags, input_ttl,
bdng, &input_token_buffer,
&actual_mech_type,
&output_token_buffer,
&ret_flags, &output_ttl)
output_token = None
if output_token_buffer.length:
output_token = \
(<char*>output_token_buffer.value)[:output_token_buffer.length]
cdef OM_uint32 tmp_min_stat
gss_release_buffer(&tmp_min_stat, &output_token_buffer)
if channel_bindings is not None:
free(bdng)
cdef OID output_mech_type = OID()
if maj_stat == GSS_S_COMPLETE or maj_stat == GSS_S_CONTINUE_NEEDED:
if actual_mech_type is not GSS_C_NO_OID:
output_mech_type.raw_oid = actual_mech_type[0]
return InitSecContextResult(output_context, output_mech_type,
IntEnumFlagSet(RequirementFlag, ret_flags),
output_token,
c_c_ttl_to_py(output_ttl),
maj_stat == GSS_S_CONTINUE_NEEDED)
else:
raise GSSError(maj_stat, min_stat, token=output_token)
def accept_sec_context(input_token not None, Creds acceptor_creds=None,
SecurityContext context=None,
ChannelBindings channel_bindings=None):
cdef gss_channel_bindings_t bdng
if channel_bindings is not None:
bdng = channel_bindings.__cvalue__()
else:
bdng = GSS_C_NO_CHANNEL_BINDINGS
cdef gss_buffer_desc input_token_buffer = gss_buffer_desc(len(input_token),
input_token)
cdef SecurityContext output_context = context
if output_context is None:
output_context = SecurityContext()
cdef gss_cred_id_t act_acceptor_cred
if acceptor_creds is not None:
act_acceptor_cred = acceptor_creds.raw_creds
else:
act_acceptor_cred = GSS_C_NO_CREDENTIAL
cdef gss_name_t initiator_name
cdef gss_OID mech_type
# GSS_C_EMPTY_BUFFER
cdef gss_buffer_desc output_token_buffer = gss_buffer_desc(0, NULL)
cdef OM_uint32 ret_flags
cdef OM_uint32 output_ttl
cdef gss_cred_id_t delegated_cred
cdef OM_uint32 maj_stat, min_stat
with nogil:
maj_stat = gss_accept_sec_context(&min_stat, &output_context.raw_ctx,
act_acceptor_cred,
&input_token_buffer, bdng,
&initiator_name,
&mech_type, &output_token_buffer,
&ret_flags, &output_ttl,
&delegated_cred)
output_token = None
if output_token_buffer.length:
output_token = \
(<char*>output_token_buffer.value)[:output_token_buffer.length]
cdef OM_uint32 tmp_min_stat
gss_release_buffer(&tmp_min_stat, &output_token_buffer)
if channel_bindings is not None:
free(bdng)
cdef Name on = Name()
cdef Creds oc = None
cdef OID py_mech_type
if maj_stat == GSS_S_COMPLETE or maj_stat == GSS_S_CONTINUE_NEEDED:
if output_ttl == GSS_C_INDEFINITE:
output_ttl_py = None
else:
output_ttl_py = output_ttl
on.raw_name = initiator_name
if delegated_cred is not NULL:
oc = Creds()
oc.raw_creds = delegated_cred
if mech_type is not NULL:
py_mech_type = OID()
py_mech_type.raw_oid = mech_type[0]
else:
py_mech_type = None
return AcceptSecContextResult(output_context, on, py_mech_type,
output_token,
IntEnumFlagSet(RequirementFlag,
ret_flags),
output_ttl_py, oc,
maj_stat == GSS_S_CONTINUE_NEEDED)
else:
raise GSSError(maj_stat, min_stat, token=output_token)
def inquire_context(SecurityContext context not None, initiator_name=True,
target_name=True, lifetime=True, mech=True,
flags=True, locally_init=True, complete=True):
cdef gss_name_t output_init_name
cdef gss_name_t *init_name_ptr = NULL
if initiator_name:
init_name_ptr = &output_init_name
cdef gss_name_t output_target_name
cdef gss_name_t *target_name_ptr = NULL
if target_name:
target_name_ptr = &output_target_name
cdef OM_uint32 ttl
cdef OM_uint32 *ttl_ptr = NULL
if lifetime:
ttl_ptr = &ttl
cdef gss_OID output_mech_type
cdef gss_OID *mech_type_ptr = NULL
if mech:
mech_type_ptr = &output_mech_type
cdef OM_uint32 output_flags
cdef OM_uint32 *flags_ptr = NULL
if flags:
flags_ptr = &output_flags
cdef int output_locally_init
cdef int *locally_init_ptr = NULL
if locally_init:
locally_init_ptr = &output_locally_init
cdef int is_complete
cdef int *is_complete_ptr = NULL
if complete:
is_complete_ptr = &is_complete
cdef OM_uint32 maj_stat, min_stat
maj_stat = gss_inquire_context(&min_stat, context.raw_ctx, init_name_ptr,
target_name_ptr, ttl_ptr, mech_type_ptr,
flags_ptr, locally_init_ptr,
is_complete_ptr)
cdef Name sn
cdef OID py_mech_type
cdef Name tn
if maj_stat == GSS_S_COMPLETE:
if initiator_name:
sn = Name()
sn.raw_name = output_init_name
else:
sn = None
if target_name and output_target_name != GSS_C_NO_NAME:
tn = Name()
tn.raw_name = output_target_name
else:
tn = None
if mech:
py_mech_type = OID()
py_mech_type.raw_oid = output_mech_type[0]
else:
py_mech_type = None
if lifetime and ttl != GSS_C_INDEFINITE:
py_ttl = ttl
else:
py_ttl = None
if flags:
py_flags = IntEnumFlagSet(RequirementFlag, output_flags)
else:
py_flags = None
if locally_init:
py_locally_init = <bint>output_locally_init
else:
py_locally_init = None
if complete:
py_complete = <bint>is_complete
else:
py_complete = None
return InquireContextResult(sn, tn, py_ttl, py_mech_type, py_flags,
py_locally_init, py_complete)
else:
raise GSSError(maj_stat, min_stat)
def context_time(SecurityContext context not None):
cdef OM_uint32 ttl
cdef OM_uint32 maj_stat, min_stat
maj_stat = gss_context_time(&min_stat, context.raw_ctx, &ttl)
if maj_stat == GSS_S_COMPLETE:
return ttl
else:
raise GSSError(maj_stat, min_stat)
def process_context_token(SecurityContext context not None, token):
cdef gss_buffer_desc token_buffer = gss_buffer_desc(len(token), token)
cdef OM_uint32 maj_stat, min_stat
with nogil:
maj_stat = gss_process_context_token(&min_stat, context.raw_ctx,
&token_buffer)
if maj_stat != GSS_S_COMPLETE:
raise GSSError(maj_stat, min_stat)
def import_sec_context(token not None):
cdef gss_buffer_desc token_buffer = gss_buffer_desc(len(token), token)
cdef gss_ctx_id_t ctx
cdef OM_uint32 maj_stat, min_stat
with nogil:
maj_stat = gss_import_sec_context(&min_stat, &token_buffer, &ctx)
if maj_stat == GSS_S_COMPLETE:
res = SecurityContext()
res.raw_ctx = ctx
return res
else:
raise GSSError(maj_stat, min_stat)
def export_sec_context(SecurityContext context not None):
cdef gss_buffer_desc output_token = gss_buffer_desc(0, NULL)
cdef OM_uint32 maj_stat, min_stat
with nogil:
maj_stat = gss_export_sec_context(&min_stat, &context.raw_ctx,
&output_token)
if maj_stat == GSS_S_COMPLETE:
res_token = (<char*>output_token.value)[:output_token.length]
gss_release_buffer(&min_stat, &output_token)
return res_token
else:
raise GSSError(maj_stat, min_stat)
def delete_sec_context(SecurityContext context not None, local_only=True):
cdef OM_uint32 maj_stat, min_stat
# GSS_C_EMPTY_BUFFER
cdef gss_buffer_desc output_token = gss_buffer_desc(0, NULL)
if not local_only:
maj_stat = gss_delete_sec_context(&min_stat, &context.raw_ctx,
&output_token)
else:
maj_stat = gss_delete_sec_context(&min_stat, &context.raw_ctx,
GSS_C_NO_BUFFER)
if maj_stat == GSS_S_COMPLETE:
res = (<char*>output_token.value)[:output_token.length]
context.raw_ctx = NULL
return res
else:
raise GSSError(maj_stat, min_stat)
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