1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ 2 /* lib/kadm5/srv/pwqual.c */ 3 /* 4 * Copyright (C) 2010 by the Massachusetts Institute of Technology. 5 * All rights reserved. 6 * 7 * Export of this software from the United States of America may 8 * require a specific license from the United States Government. 9 * It is the responsibility of any person or organization contemplating 10 * export to obtain such a license before exporting. 11 * 12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 13 * distribute this software and its documentation for any purpose and 14 * without fee is hereby granted, provided that the above copyright 15 * notice appear in all copies and that both that copyright notice and 16 * this permission notice appear in supporting documentation, and that 17 * the name of M.I.T. not be used in advertising or publicity pertaining 18 * to distribution of the software without specific, written prior 19 * permission. Furthermore if you modify this software you must label 20 * your software as modified software and not distribute it in such a 21 * fashion that it might be confused with the original M.I.T. software. 22 * M.I.T. makes no representations about the suitability of 23 * this software for any purpose. It is provided "as is" without express 24 * or implied warranty. 25 */ 26 27 /* 28 * 29 * Consumer interface for password quality plugins. 30 */ 31 32 #include "k5-int.h" 33 #include "server_internal.h" 34 #include <krb5/pwqual_plugin.h> 35 36 struct pwqual_handle_st { 37 struct krb5_pwqual_vtable_st vt; 38 krb5_pwqual_moddata data; 39 }; 40 41 krb5_error_code 42 k5_pwqual_load(krb5_context context, const char *dict_file, 43 pwqual_handle **handles_out) 44 { 45 krb5_error_code ret; 46 krb5_plugin_initvt_fn *modules = NULL, *mod; 47 size_t count; 48 pwqual_handle *list = NULL, handle = NULL; 49 50 *handles_out = NULL; 51 52 ret = k5_plugin_load_all(context, PLUGIN_INTERFACE_PWQUAL, &modules); 53 if (ret != 0) 54 goto cleanup; 55 56 /* Allocate a large enough list of handles. */ 57 for (count = 0; modules[count] != NULL; count++); 58 list = k5calloc(count + 1, sizeof(*list), &ret); 59 if (list == NULL) 60 goto cleanup; 61 62 /* For each module, allocate a handle, initialize its vtable, and bind the 63 * dictionary filename. */ 64 count = 0; 65 for (mod = modules; *mod != NULL; mod++) { 66 handle = k5alloc(sizeof(*handle), &ret); 67 if (handle == NULL) 68 goto cleanup; 69 ret = (*mod)(context, 1, 1, (krb5_plugin_vtable)&handle->vt); 70 if (ret != 0) { /* Failed vtable init is non-fatal. */ 71 free(handle); 72 handle = NULL; 73 continue; 74 } 75 handle->data = NULL; 76 if (handle->vt.open != NULL) { 77 ret = handle->vt.open(context, dict_file, &handle->data); 78 if (ret != 0) /* Failed dictionary binding is fatal. */ 79 goto cleanup; 80 } 81 list[count++] = handle; 82 list[count] = NULL; 83 handle = NULL; 84 } 85 list[count] = NULL; 86 87 ret = 0; 88 *handles_out = list; 89 list = NULL; 90 91 cleanup: 92 free(handle); 93 k5_plugin_free_modules(context, modules); 94 k5_pwqual_free_handles(context, list); 95 return ret; 96 } 97 98 void 99 k5_pwqual_free_handles(krb5_context context, pwqual_handle *handles) 100 { 101 pwqual_handle *hp, handle; 102 103 if (handles == NULL) 104 return; 105 for (hp = handles; *hp != NULL; hp++) { 106 handle = *hp; 107 if (handle->vt.close != NULL) 108 handle->vt.close(context, handle->data); 109 free(handle); 110 } 111 free(handles); 112 } 113 114 const char * 115 k5_pwqual_name(krb5_context context, pwqual_handle handle) 116 { 117 return handle->vt.name; 118 } 119 120 krb5_error_code 121 k5_pwqual_check(krb5_context context, pwqual_handle handle, 122 const char *password, const char *policy_name, 123 krb5_principal princ) 124 { 125 return handle->vt.check(context, handle->data, password, policy_name, 126 princ, NULL); 127 } 128