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- /**
- * Copyright (c) 2006-2008 Apple Inc. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- **/
- #include <Python.h>
- #include "kerberosbasic.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #undef PRINTFS
- extern PyObject *BasicAuthException_class;
- static void set_basicauth_error(krb5_context context, krb5_error_code code);
- static krb5_error_code verify_krb5_user(krb5_context context, krb5_principal principal, const char *password, krb5_principal server);
- int authenticate_user_krb5pwd(const char *user, const char *pswd, const char *service, const char *default_realm)
- {
- krb5_context kcontext = NULL;
- krb5_error_code code;
- krb5_principal client = NULL;
- krb5_principal server = NULL;
- int ret = 0;
- char *name = NULL;
- char *p = NULL;
- code = krb5_init_context(&kcontext);
- if (code)
- {
- PyErr_SetObject(BasicAuthException_class, Py_BuildValue("((s:i))",
- "Cannot initialize Kerberos5 context", code));
- return 0;
- }
- ret = krb5_parse_name (kcontext, service, &server);
- if (ret)
- {
- set_basicauth_error(kcontext, ret);
- ret = 0;
- goto end;
- }
- code = krb5_unparse_name(kcontext, server, &name);
- if (code)
- {
- set_basicauth_error(kcontext, code);
- ret = 0;
- goto end;
- }
- #ifdef PRINTFS
- printf("Using %s as server principal for password verification\n", name);
- #endif
- free(name);
- name = NULL;
- name = (char *)malloc(256);
- p = strchr(user, '@');
- if (p == NULL)
- {
- snprintf(name, 256, "%s@%s", user, default_realm);
- }
- else
- {
- snprintf(name, 256, "%s", user);
- }
- code = krb5_parse_name(kcontext, name, &client);
- if (code)
- {
- set_basicauth_error(kcontext, code);
- ret = 0;
- goto end;
- }
- code = verify_krb5_user(kcontext, client, pswd, server);
- if (code)
- {
- ret = 0;
- goto end;
- }
- ret = 1;
- end:
- #ifdef PRINTFS
- printf("kerb_authenticate_user_krb5pwd ret=%d user=%s authtype=%s\n", ret, user, "Basic");
- #endif
- if (name)
- free(name);
- if (client)
- krb5_free_principal(kcontext, client);
- if (server)
- krb5_free_principal(kcontext, server);
- krb5_free_context(kcontext);
- return ret;
- }
- /* Inspired by krb5_verify_user from Heimdal */
- static krb5_error_code verify_krb5_user(krb5_context context, krb5_principal principal, const char *password, krb5_principal server)
- {
- krb5_creds creds;
- krb5_get_init_creds_opt gic_options;
- krb5_error_code ret;
- char *name = NULL;
- memset(&creds, 0, sizeof(creds));
- ret = krb5_unparse_name(context, principal, &name);
- if (ret == 0)
- {
- #ifdef PRINTFS
- printf("Trying to get TGT for user %s\n", name);
- #endif
- free(name);
- }
- krb5_get_init_creds_opt_init(&gic_options);
- ret = krb5_get_init_creds_password(context, &creds, principal, (char *)password, NULL, NULL, 0, NULL, &gic_options);
- if (ret)
- {
- set_basicauth_error(context, ret);
- goto end;
- }
- end:
- krb5_free_cred_contents(context, &creds);
- return ret;
- }
- static void set_basicauth_error(krb5_context context, krb5_error_code code)
- {
- PyErr_SetObject(BasicAuthException_class, Py_BuildValue("(s:i)", krb5_get_err_text(context, code), code));
- }
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