From a1e1f02efea3a6c1f419a7d93498718d46636d2b Mon Sep 17 00:00:00 2001 From: Andrew Bartlett Date: Tue, 18 Jan 2011 19:14:45 +1100 Subject: s4-gensec Extend python bindings for GENSEC and the associated test This now tests a real GENSEC exchange, including wrap and unwrap, using GSSAPI. Therefore, it now needs to access a KDC. Andrew Bartlett Autobuild-User: Andrew Bartlett Autobuild-Date: Tue Jan 18 11:41:26 CET 2011 on sn-devel-104 --- source4/auth/gensec/pygensec.c | 244 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 223 insertions(+), 21 deletions(-) (limited to 'source4/auth/gensec/pygensec.c') diff --git a/source4/auth/gensec/pygensec.c b/source4/auth/gensec/pygensec.c index 80fdd728e0..da62018eeb 100644 --- a/source4/auth/gensec/pygensec.c +++ b/source4/auth/gensec/pygensec.c @@ -20,6 +20,7 @@ #include "includes.h" #include "param/pyparam.h" #include "auth/gensec/gensec.h" +#include "auth/credentials/pycredentials.h" #include "libcli/util/pyerrors.h" #include "scripting/python/modules.h" #include "lib/talloc/pytalloc.h" @@ -84,7 +85,7 @@ static PyObject *py_gensec_start_client(PyTypeObject *type, PyObject *args, PyOb struct tevent_context *ev; struct gensec_security *gensec; - if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O", discard_const_p(char *, kwnames), &py_settings)) + if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|O", discard_const_p(char *, kwnames), &py_settings)) return NULL; self = (py_talloc_Object*)type->tp_alloc(type, 0); @@ -98,10 +99,20 @@ static PyObject *py_gensec_start_client(PyTypeObject *type, PyObject *args, PyOb return NULL; } - settings = settings_from_object(self->talloc_ctx, py_settings); - if (settings == NULL) { - PyObject_DEL(self); - return NULL; + if (py_settings != Py_None) { + settings = settings_from_object(self->talloc_ctx, py_settings); + if (settings == NULL) { + PyObject_DEL(self); + return NULL; + } + } else { + settings = talloc_zero(self->talloc_ctx, struct gensec_settings); + if (settings == NULL) { + PyObject_DEL(self); + return NULL; + } + + settings->lp_ctx = loadparm_init_global(true); } ev = tevent_context_init(self->talloc_ctx); @@ -134,15 +145,15 @@ static PyObject *py_gensec_start_server(PyTypeObject *type, PyObject *args, PyOb { NTSTATUS status; py_talloc_Object *self; - struct gensec_settings *settings; - const char *kwnames[] = { "auth_context", "settings", NULL }; - PyObject *py_settings; - PyObject *py_auth_context; + struct gensec_settings *settings = NULL; + const char *kwnames[] = { "settings", "auth_context", NULL }; + PyObject *py_settings = Py_None; + PyObject *py_auth_context = Py_None; struct tevent_context *ev; struct gensec_security *gensec; - struct auth_context *auth_context; + struct auth_context *auth_context = NULL; - if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO", discard_const_p(char *, kwnames), &py_auth_context, &py_settings)) + if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OO", discard_const_p(char *, kwnames), &py_settings, &py_auth_context)) return NULL; self = (py_talloc_Object*)type->tp_alloc(type, 0); @@ -156,10 +167,20 @@ static PyObject *py_gensec_start_server(PyTypeObject *type, PyObject *args, PyOb return NULL; } - settings = settings_from_object(self->talloc_ctx, py_settings); - if (settings == NULL) { - PyObject_DEL(self); - return NULL; + if (py_settings != Py_None) { + settings = settings_from_object(self->talloc_ctx, py_settings); + if (settings == NULL) { + PyObject_DEL(self); + return NULL; + } + } else { + settings = talloc_zero(self->talloc_ctx, struct gensec_settings); + if (settings == NULL) { + PyObject_DEL(self); + return NULL; + } + + settings->lp_ctx = loadparm_init_global(true); } ev = tevent_context_init(self->talloc_ctx); @@ -169,7 +190,15 @@ static PyObject *py_gensec_start_server(PyTypeObject *type, PyObject *args, PyOb return NULL; } - auth_context = py_talloc_get_type(self, struct auth_context); + if (py_auth_context != Py_None) { + auth_context = py_talloc_get_type(py_auth_context, struct auth_context); + if (!auth_context) { + PyErr_Format(PyExc_TypeError, + "Expected auth.AuthContext for auth_context argument, got %s", + talloc_get_name(py_talloc_get_ptr(py_auth_context))); + return NULL; + } + } status = gensec_init(settings->lp_ctx); if (!NT_STATUS_IS_OK(status)) { @@ -190,6 +219,32 @@ static PyObject *py_gensec_start_server(PyTypeObject *type, PyObject *args, PyOb return (PyObject *)self; } +static PyObject *py_gensec_set_credentials(PyObject *self, PyObject *args) +{ + PyObject *py_creds = Py_None; + struct cli_credentials *creds; + struct gensec_security *security = py_talloc_get_type(self, struct gensec_security); + NTSTATUS status; + + if (!PyArg_ParseTuple(args, "O", &py_creds)) + return NULL; + + creds = PyCredentials_AsCliCredentials(py_creds); + if (!creds) { + PyErr_Format(PyExc_TypeError, + "Expected samba.credentaials for credentials argument got %s", + talloc_get_name(py_talloc_get_ptr(py_creds))); + } + + status = gensec_set_credentials(security, creds); + if (!NT_STATUS_IS_OK(status)) { + PyErr_SetNTSTATUS(status); + return NULL; + } + + Py_RETURN_NONE; +} + static PyObject *py_gensec_session_info(PyObject *self) { NTSTATUS status; @@ -206,7 +261,7 @@ static PyObject *py_gensec_session_info(PyObject *self) return NULL; } - py_session_info = py_return_ndr_struct("samba.auth", "session_info", + py_session_info = py_return_ndr_struct("samba.auth", "AuthSession", info, info); return py_session_info; } @@ -229,6 +284,24 @@ static PyObject *py_gensec_start_mech_by_name(PyObject *self, PyObject *args) Py_RETURN_NONE; } +static PyObject *py_gensec_start_mech_by_sasl_name(PyObject *self, PyObject *args) +{ + char *sasl_name; + struct gensec_security *security = py_talloc_get_type(self, struct gensec_security); + NTSTATUS status; + + if (!PyArg_ParseTuple(args, "s", &sasl_name)) + return NULL; + + status = gensec_start_mech_by_sasl_name(security, sasl_name); + if (!NT_STATUS_IS_OK(status)) { + PyErr_SetNTSTATUS(status); + return NULL; + } + + Py_RETURN_NONE; +} + static PyObject *py_gensec_start_mech_by_authtype(PyObject *self, PyObject *args) { int authtype, level; @@ -246,6 +319,33 @@ static PyObject *py_gensec_start_mech_by_authtype(PyObject *self, PyObject *args Py_RETURN_NONE; } +static PyObject *py_gensec_want_feature(PyObject *self, PyObject *args) +{ + int feature; + struct gensec_security *security = py_talloc_get_type(self, struct gensec_security); + /* This is i (and declared as an int above) by design, as they are handled as an integer in python */ + if (!PyArg_ParseTuple(args, "i", &feature)) + return NULL; + + gensec_want_feature(security, feature); + + Py_RETURN_NONE; +} + +static PyObject *py_gensec_have_feature(PyObject *self, PyObject *args) +{ + int feature; + struct gensec_security *security = py_talloc_get_type(self, struct gensec_security); + /* This is i (and declared as an int above) by design, as they are handled as an integer in python */ + if (!PyArg_ParseTuple(args, "i", &feature)) + return NULL; + + if (gensec_have_feature(security, feature)) { + return Py_True; + } + return Py_False; +} + static PyObject *py_gensec_update(PyObject *self, PyObject *args) { NTSTATUS status; @@ -260,18 +360,107 @@ static PyObject *py_gensec_update(PyObject *self, PyObject *args) mem_ctx = talloc_new(NULL); - in.data = (uint8_t *)PyString_AsString(py_in); - in.length = PyString_Size(py_in); + if (py_in == Py_None) { + in = data_blob_null; + } else { + in.data = (uint8_t *)PyString_AsString(py_in); + in.length = PyString_Size(py_in); + } status = gensec_update(security, mem_ctx, in, &out); + if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) + && !NT_STATUS_IS_OK(status)) { + PyErr_SetNTSTATUS(status); + talloc_free(mem_ctx); + return NULL; + } + if (out.length != 0) { + ret = PyString_FromStringAndSize((const char *)out.data, out.length); + } else { + ret = Py_None; + } + talloc_free(mem_ctx); + if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) + { + return PyTuple_Pack(2, Py_False, ret); + } else { + return PyTuple_Pack(2, Py_True, ret); + } +} + +static PyObject *py_gensec_wrap(PyObject *self, PyObject *args) +{ + NTSTATUS status; + + TALLOC_CTX *mem_ctx; + DATA_BLOB in, out; + PyObject *ret, *py_in; + struct gensec_security *security = py_talloc_get_type(self, struct gensec_security); + + if (!PyArg_ParseTuple(args, "O", &py_in)) + return NULL; + + mem_ctx = talloc_new(NULL); + + if (py_in == Py_None) { + in = data_blob_null; + } else { + in.data = (uint8_t *)PyString_AsString(py_in); + in.length = PyString_Size(py_in); + } + + status = gensec_wrap(security, mem_ctx, &in, &out); + if (!NT_STATUS_IS_OK(status)) { PyErr_SetNTSTATUS(status); talloc_free(mem_ctx); return NULL; } - ret = PyString_FromStringAndSize((const char *)out.data, out.length); + if (out.length != 0) { + ret = PyString_FromStringAndSize((const char *)out.data, out.length); + } else { + ret = Py_None; + } + talloc_free(mem_ctx); + return ret; +} + +static PyObject *py_gensec_unwrap(PyObject *self, PyObject *args) +{ + NTSTATUS status; + + TALLOC_CTX *mem_ctx; + DATA_BLOB in, out; + PyObject *ret, *py_in; + struct gensec_security *security = py_talloc_get_type(self, struct gensec_security); + + if (!PyArg_ParseTuple(args, "O", &py_in)) + return NULL; + + mem_ctx = talloc_new(NULL); + + if (py_in == Py_None) { + in = data_blob_null; + } else { + in.data = (uint8_t *)PyString_AsString(py_in); + in.length = PyString_Size(py_in); + } + + status = gensec_unwrap(security, mem_ctx, &in, &out); + + if (!NT_STATUS_IS_OK(status)) { + PyErr_SetNTSTATUS(status); + talloc_free(mem_ctx); + return NULL; + } + + if (out.length != 0) { + ret = PyString_FromStringAndSize((const char *)out.data, out.length); + } else { + ret = Py_None; + } talloc_free(mem_ctx); return ret; } @@ -281,15 +470,28 @@ static PyMethodDef py_gensec_security_methods[] = { "S.start_client(settings) -> gensec" }, { "start_server", (PyCFunction)py_gensec_start_server, METH_VARARGS|METH_KEYWORDS|METH_CLASS, "S.start_server(auth_ctx, settings) -> gensec" }, + { "set_credentials", (PyCFunction)py_gensec_set_credentials, METH_VARARGS, + "S.start_client(credentials)" }, { "session_info", (PyCFunction)py_gensec_session_info, METH_NOARGS, "S.session_info() -> info" }, { "start_mech_by_name", (PyCFunction)py_gensec_start_mech_by_name, METH_VARARGS, "S.start_mech_by_name(name)" }, + { "start_mech_by_sasl_name", (PyCFunction)py_gensec_start_mech_by_sasl_name, METH_VARARGS, + "S.start_mech_by_sasl_name(name)" }, { "start_mech_by_authtype", (PyCFunction)py_gensec_start_mech_by_authtype, METH_VARARGS, "S.start_mech_by_authtype(authtype, level)" }, { "get_name_by_authtype", (PyCFunction)py_get_name_by_authtype, METH_VARARGS, "S.get_name_by_authtype(authtype) -> name\nLookup an auth type." }, + { "want_feature", (PyCFunction)py_gensec_want_feature, METH_VARARGS, + "S.want_feature(feature)\n Request that GENSEC negotiate a particular feature." }, + { "have_feature", (PyCFunction)py_gensec_have_feature, METH_VARARGS, + "S.have_feature()\n Return True if GENSEC negotiated a particular feature." }, { "update", (PyCFunction)py_gensec_update, METH_VARARGS, - "S.update(blob_in) -> blob_out\nPerform one step in a GENSEC dance." }, + "S.update(blob_in) -> (finished, blob_out)\nPerform one step in a GENSEC dance. Repeat with new packets until finished is true or exception." }, + { "wrap", (PyCFunction)py_gensec_wrap, METH_VARARGS, + "S.wrap(blob_in) -> blob_out\nPackage one clear packet into a wrapped GENSEC packet." }, + { "unwrap", (PyCFunction)py_gensec_unwrap, METH_VARARGS, + "S.unwrap(blob_in) -> blob_out\nPerform one wrapped GENSEC packet into a clear packet." }, + { NULL } }; -- cgit