1 /*-
2 * Copyright (c) 2011-2014 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
30 #ifdef HAVE_CONFIG_H
31 # include "config.h"
32 #endif
33
34 #include <ctype.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39
40 #include <security/pam_appl.h>
41
42 #include "openpam_impl.h"
43 #include "openpam_asprintf.h"
44
45 static char *
openpam_chain_name(const char * service,pam_facility_t fclt)46 openpam_chain_name(const char *service, pam_facility_t fclt)
47 {
48 const char *facility = pam_facility_name[fclt];
49 char *name;
50
51 if (asprintf(&name, "pam_%s_%s", service, facility) == -1)
52 return (NULL);
53 return (name);
54 }
55
56 static char *
openpam_facility_index_name(pam_facility_t fclt)57 openpam_facility_index_name(pam_facility_t fclt)
58 {
59 const char *facility = pam_facility_name[fclt];
60 char *name, *p;
61
62 if (asprintf(&name, "PAM_%s", facility) == -1)
63 return (NULL);
64 for (p = name + 4; *p; ++p)
65 *p = toupper((unsigned char)*p);
66 return (name);
67 }
68
69 int
openpam_dump_chain(const char * name,pam_chain_t * chain)70 openpam_dump_chain(const char *name, pam_chain_t *chain)
71 {
72 char *modname, **opt, *p;
73 int i;
74
75 for (i = 0; chain != NULL; ++i, chain = chain->next) {
76 /* declare the module's struct pam_module */
77 modname = strrchr(chain->module->path, '/');
78 modname = strdup(modname ? modname : chain->module->path);
79 if (modname == NULL)
80 return (PAM_BUF_ERR);
81 for (p = modname; *p && *p != '.'; ++p)
82 /* nothing */ ;
83 *p = '\0';
84 printf("extern struct pam_module %s_pam_module;\n", modname);
85 /* module arguments */
86 printf("static char *%s_%d_optv[] = {\n", name, i);
87 for (opt = chain->optv; *opt; ++opt) {
88 printf("\t\"");
89 for (p = *opt; *p; ++p) {
90 if (isprint((unsigned char)*p) && *p != '"')
91 printf("%c", *p);
92 else
93 printf("\\x%02x", (unsigned char)*p);
94 }
95 printf("\",\n");
96 }
97 printf("\tNULL,\n");
98 printf("};\n");
99 /* next module in chain */
100 if (chain->next != NULL)
101 printf("static pam_chain_t %s_%d;\n", name, i + 1);
102 /* chain entry */
103 printf("static pam_chain_t %s_%d = {\n", name, i);
104 printf("\t.module = &%s_pam_module,\n", modname);
105 printf("\t.flag = 0x%08x,\n", chain->flag);
106 printf("\t.optc = %d,\n", chain->optc);
107 printf("\t.optv = %s_%d_optv,\n", name, i);
108 if (chain->next)
109 printf("\t.next = &%s_%d,\n", name, i + 1);
110 else
111 printf("\t.next = NULL,\n");
112 printf("};\n");
113 free(modname);
114 }
115 return (PAM_SUCCESS);
116 }
117
118 int
openpam_dump_policy(const char * service)119 openpam_dump_policy(const char *service)
120 {
121 pam_handle_t *pamh;
122 char *name;
123 int fclt, ret;
124
125 if ((pamh = calloc(1, sizeof *pamh)) == NULL)
126 return (PAM_BUF_ERR);
127 if ((ret = openpam_configure(pamh, service)) != PAM_SUCCESS)
128 return (ret);
129 for (fclt = 0; fclt < PAM_NUM_FACILITIES; ++fclt) {
130 if (pamh->chains[fclt] != NULL) {
131 if ((name = openpam_chain_name(service, fclt)) == NULL)
132 return (PAM_BUF_ERR);
133 ret = openpam_dump_chain(name, pamh->chains[fclt]);
134 free(name);
135 if (ret != PAM_SUCCESS)
136 return (ret);
137 }
138 }
139 printf("static pam_policy_t pam_%s_policy = {\n", service);
140 printf("\t.service = \"%s\",\n", service);
141 printf("\t.chains = {\n");
142 for (fclt = 0; fclt < PAM_NUM_FACILITIES; ++fclt) {
143 if ((name = openpam_facility_index_name(fclt)) == NULL)
144 return (PAM_BUF_ERR);
145 printf("\t\t[%s] = ", name);
146 free(name);
147 if (pamh->chains[fclt] != NULL) {
148 if ((name = openpam_chain_name(service, fclt)) == NULL)
149 return (PAM_BUF_ERR);
150 printf("&%s_0,\n", name);
151 free(name);
152 } else {
153 printf("NULL,\n");
154 }
155 }
156 printf("\t},\n");
157 printf("};\n");
158 free(pamh);
159 return (PAM_SUCCESS);
160 }
161
162 static void
usage(void)163 usage(void)
164 {
165
166 fprintf(stderr, "usage: openpam_dump_policy [-d] policy ...\n");
167 exit(1);
168 }
169
170 int
main(int argc,char * argv[])171 main(int argc, char *argv[])
172 {
173 int i, opt;
174
175 while ((opt = getopt(argc, argv, "d")) != -1)
176 switch (opt) {
177 case 'd':
178 openpam_debug = 1;
179 break;
180 default:
181 usage();
182 }
183
184 argc -= optind;
185 argv += optind;
186
187 if (argc < 1)
188 usage();
189
190 printf("#include <security/pam_appl.h>\n");
191 printf("#include \"openpam_impl.h\"\n");
192 for (i = 0; i < argc; ++i)
193 openpam_dump_policy(argv[i]);
194 printf("pam_policy_t *pam_embedded_policies[] = {\n");
195 for (i = 0; i < argc; ++i)
196 printf("\t&pam_%s_policy,\n", argv[i]);
197 printf("\tNULL,\n");
198 printf("};\n");
199 exit(0);
200 }
201