1 /*- 2 * Copyright (c) 2011 Dag-Erling Smørgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $Id: openpam_dump_policy.c 648 2013-03-05 17:54:27Z des $ 30 */ 31 32 #ifdef HAVE_CONFIG_H 33 # include "config.h" 34 #endif 35 36 #include <ctype.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 #include <security/pam_appl.h> 43 44 #include "openpam_impl.h" 45 #include "openpam_asprintf.h" 46 47 static char * 48 openpam_chain_name(const char *service, pam_facility_t fclt) 49 { 50 const char *facility = pam_facility_name[fclt]; 51 char *name; 52 53 if (asprintf(&name, "pam_%s_%s", service, facility) == -1) 54 return (NULL); 55 return (name); 56 } 57 58 static char * 59 openpam_facility_index_name(pam_facility_t fclt) 60 { 61 const char *facility = pam_facility_name[fclt]; 62 char *name, *p; 63 64 if (asprintf(&name, "PAM_%s", facility) == -1) 65 return (NULL); 66 for (p = name + 4; *p; ++p) 67 *p = toupper(*p); 68 return (name); 69 } 70 71 int 72 openpam_dump_chain(const char *name, pam_chain_t *chain) 73 { 74 char *modname, **opt, *p; 75 int i; 76 77 for (i = 0; chain != NULL; ++i, chain = chain->next) { 78 /* declare the module's struct pam_module */ 79 modname = strrchr(chain->module->path, '/'); 80 modname = strdup(modname ? modname : chain->module->path); 81 if (modname == NULL) 82 return (PAM_BUF_ERR); 83 for (p = modname; *p && *p != '.'; ++p) 84 /* nothing */ ; 85 *p = '\0'; 86 printf("extern struct pam_module %s_pam_module;\n", modname); 87 /* module arguments */ 88 printf("static char *%s_%d_optv[] = {\n", name, i); 89 for (opt = chain->optv; *opt; ++opt) { 90 printf("\t\""); 91 for (p = *opt; *p; ++p) { 92 if (isprint((unsigned char)*p) && *p != '"') 93 printf("%c", *p); 94 else 95 printf("\\x%02x", (unsigned char)*p); 96 } 97 printf("\",\n"); 98 } 99 printf("\tNULL,\n"); 100 printf("};\n"); 101 /* next module in chain */ 102 if (chain->next != NULL) 103 printf("static pam_chain_t %s_%d;\n", name, i + 1); 104 /* chain entry */ 105 printf("static pam_chain_t %s_%d = {\n", name, i); 106 printf("\t.module = &%s_pam_module,\n", modname); 107 printf("\t.flag = 0x%08x,\n", chain->flag); 108 printf("\t.optc = %d,\n", chain->optc); 109 printf("\t.optv = %s_%d_optv,\n", name, i); 110 if (chain->next) 111 printf("\t.next = &%s_%d,\n", name, i + 1); 112 else 113 printf("\t.next = NULL,\n"); 114 printf("};\n"); 115 free(modname); 116 } 117 return (PAM_SUCCESS); 118 } 119 120 int 121 openpam_dump_policy(const char *service) 122 { 123 pam_handle_t *pamh; 124 char *name; 125 int fclt, ret; 126 127 if ((pamh = calloc(1, sizeof *pamh)) == NULL) 128 return (PAM_BUF_ERR); 129 if ((ret = openpam_configure(pamh, service)) != PAM_SUCCESS) 130 return (ret); 131 for (fclt = 0; fclt < PAM_NUM_FACILITIES; ++fclt) { 132 if (pamh->chains[fclt] != NULL) { 133 if ((name = openpam_chain_name(service, fclt)) == NULL) 134 return (PAM_BUF_ERR); 135 ret = openpam_dump_chain(name, pamh->chains[fclt]); 136 free(name); 137 if (ret != PAM_SUCCESS) 138 return (ret); 139 } 140 } 141 printf("static pam_policy_t pam_%s_policy = {\n", service); 142 printf("\t.service = \"%s\",\n", service); 143 printf("\t.chains = {\n"); 144 for (fclt = 0; fclt < PAM_NUM_FACILITIES; ++fclt) { 145 if ((name = openpam_facility_index_name(fclt)) == NULL) 146 return (PAM_BUF_ERR); 147 printf("\t\t[%s] = ", name); 148 free(name); 149 if (pamh->chains[fclt] != NULL) { 150 if ((name = openpam_chain_name(service, fclt)) == NULL) 151 return (PAM_BUF_ERR); 152 printf("&%s_0,\n", name); 153 free(name); 154 } else { 155 printf("NULL,\n"); 156 } 157 } 158 printf("\t},\n"); 159 printf("};\n"); 160 free(pamh); 161 return (PAM_SUCCESS); 162 } 163 164 static void 165 usage(void) 166 { 167 168 fprintf(stderr, "usage: openpam_dump_policy [-d] policy ...\n"); 169 exit(1); 170 } 171 172 int 173 main(int argc, char *argv[]) 174 { 175 int i, opt; 176 177 while ((opt = getopt(argc, argv, "d")) != -1) 178 switch (opt) { 179 case 'd': 180 openpam_debug = 1; 181 break; 182 default: 183 usage(); 184 } 185 186 argc -= optind; 187 argv += optind; 188 189 if (argc < 1) 190 usage(); 191 192 printf("#include <security/pam_appl.h>\n"); 193 printf("#include \"openpam_impl.h\"\n"); 194 for (i = 0; i < argc; ++i) 195 openpam_dump_policy(argv[i]); 196 printf("pam_policy_t *pam_embedded_policies[] = {\n"); 197 for (i = 0; i < argc; ++i) 198 printf("\t&pam_%s_policy,\n", argv[i]); 199 printf("\tNULL,\n"); 200 printf("};\n"); 201 exit(0); 202 } 203