add external blob and internal blobmsg data structures
[oweals/ucert.git] / ucert.c
1 /*
2  * Copyright (C) 2018 Daniel Golle <daniel@makrotopia.org>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 3
6  * as published by the Free Software Foundation
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  */
13
14 #define _GNU_SOURCE
15
16 #include <fcntl.h>
17 #include <dlfcn.h>
18 #include <stdio.h>
19 #include <stdbool.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <getopt.h>
23 #include <stdint.h>
24 #include <unistd.h>
25 #include <inttypes.h>
26 #include <sys/stat.h>
27 #include <sys/wait.h>
28
29 #include <json-c/json.h>
30 #include <libubox/blob.h>
31 #include <libubox/list.h>
32 #include <libubox/vlist.h>
33 #include <libubox/blobmsg_json.h>
34
35 static enum {
36         CMD_APPEND,
37         CMD_DUMP,
38         CMD_ISSUE,
39         CMD_REVOKE,
40         CMD_VERIFY,
41         CMD_NONE,
42 } cmd = CMD_NONE;
43
44 static bool quiet;
45
46 enum cert_attr {
47         CERT_ATTR_SIGNATURE,
48         CERT_ATTR_PAYLOAD,
49         CERT_ATTR_MAX
50 };
51
52 static const struct blob_attr_info cert_policy[CERT_ATTR_MAX] = {
53         [CERT_ATTR_SIGNATURE] = { .type = BLOB_ATTR_BINARY },
54         [CERT_ATTR_PAYLOAD] = { .type = BLOB_ATTR_NESTED },
55 };
56
57 enum cert_payload_attr {
58         CERT_PL_ATTR_CERTTYPE,
59         CERT_PL_ATTR_CERTID,
60         CERT_PL_ATTR_PUBKEY,
61         CERT_PL_ATTR_KEY_FINGERPRINT,
62         CERT_PL_ATTR_MAX
63 };
64
65 enum certtype_id {
66         CERTTYPE_AUTH,
67         CERTTYPE_REVOKE
68 };
69
70 static const struct blobmsg_policy cert_payload_policy[CERT_PL_ATTR_MAX] = {
71         [CERT_PL_ATTR_CERTTYPE] = { .type = BLOBMSG_TYPE_INT8 },
72         [CERT_PL_ATTR_CERTID] = { .type = BLOBMSG_TYPE_INT64 },
73         [CERT_PL_ATTR_PUBKEY] = { .type = BLOBMSG_TYPE_STRING },
74         [CERT_PL_ATTR_KEY_FINGERPRINT] = { .type = BLOBMSG_TYPE_STRING },
75 };
76
77 static int cert_append(const char *certfile, const char *pubkeyfile, const char *sigfile) {
78         fprintf(stderr, "not implemented\n");
79         return 1;
80 }
81
82 static int cert_dump(const char *certfile) {
83         fprintf(stderr, "not implemented\n");
84         return 1;
85 }
86
87 static int cert_issue(const char *certfile, const char *pubkeyfile, const char *seckeyfile) {
88         fprintf(stderr, "not implemented\n");
89         return 1;
90 }
91
92 static int cert_process_revoker(const char *certfile) {
93         fprintf(stderr, "not implemented\n");
94         return 1;
95 }
96
97 static int cert_verify(const char *certfile, const char *pubkeyfile, const char *pubkeydir, const char *msgfile) {
98         fprintf(stderr, "not implemented\n");
99         return 1;
100 }
101
102 static int usage(const char *cmd)
103 {
104         fprintf(stderr,
105                 "Usage: %s <command> <options>\n"
106                 "Commands:\n"
107                 "  -A:                  append (needs -c and -p and/or -x)\n"
108                 "  -D:                  dump\n"
109                 "  -I:                  issue cert and revoker (needs -c and -p and -s)\n"
110                 "  -R:                  process revoker certificate (needs -c)\n"
111                 "  -V:                  verify (needs -c and -p|-P)\n"
112                 "Options:\n"
113                 "  -c <file>:           certificate file\n"
114                 "  -m <file>:           message file (verify only)\n"
115                 "  -p <file>:           public key file\n"
116                 "  -P <path>:           public key directory (verify only)\n"
117                 "  -q:                  quiet (do not print verification result, use return code only)\n"
118                 "  -s <file>:           secret key file (issue only)\n"
119                 "  -x <file>:           signature file\n"
120                 "\n",
121                 cmd);
122         return 1;
123 }
124
125 int main(int argc, char *argv[]) {
126         int ch;
127         const char *msgfile = NULL;
128         const char *sigfile = NULL;
129         const char *pubkeyfile = NULL;
130         const char *pubkeydir = NULL;
131         const char *certfile = NULL;
132         const char *seckeyfile = NULL;
133
134         quiet = false;
135         while ((ch = getopt(argc, argv, "ADIRVc:m:p:P:qs:x:")) != -1) {
136                 switch (ch) {
137                 case 'A':
138                         cmd = CMD_APPEND;
139                         break;
140                 case 'D':
141                         cmd = CMD_DUMP;
142                         break;
143                 case 'I':
144                         cmd = CMD_ISSUE;
145                         break;
146                 case 'R':
147                         cmd = CMD_REVOKE;
148                         break;
149                 case 'V':
150                         cmd = CMD_VERIFY;
151                         break;
152                 case 'c':
153                         certfile = optarg;
154                         break;
155                 case 'm':
156                         msgfile = optarg;
157                         break;
158                 case 'p':
159                         pubkeyfile = optarg;
160                         break;
161                 case 'P':
162                         pubkeydir = optarg;
163                         break;
164                 case 's':
165                         seckeyfile = optarg;
166                         break;
167                 case 'q':
168                         quiet = true;
169                         break;
170                 case 'x':
171                         sigfile = optarg;
172                         break;
173                 default:
174                         return usage(argv[0]);
175                 }
176         }
177
178         switch (cmd) {
179         case CMD_APPEND:
180                 if (certfile && (pubkeyfile || sigfile))
181                         return cert_append(certfile, pubkeyfile, sigfile);
182                 else
183                         return usage(argv[0]);
184         case CMD_DUMP:
185                 if (certfile)
186                         return cert_dump(certfile);
187                 else
188                         return usage(argv[0]);
189         case CMD_ISSUE:
190                 if (certfile && pubkeyfile && seckeyfile)
191                         return cert_issue(certfile, pubkeyfile, seckeyfile);
192                 else
193                         return usage(argv[0]);
194         case CMD_REVOKE:
195                 if (certfile)
196                         return cert_process_revoker(certfile);
197                 else
198                         return usage(argv[0]);
199         case CMD_VERIFY:
200                 if (certfile && (pubkeyfile || pubkeydir))
201                         return cert_verify(certfile, pubkeyfile, pubkeydir, msgfile);
202                 else
203                         return usage(argv[0]);
204         case CMD_NONE:
205                 return usage(argv[0]);
206         }
207
208         /* unreachable */
209         return usage(argv[0]);
210 }