2 * Copyright (C) 2018 Daniel Golle <daniel@makrotopia.org>
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
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.
29 #include <json-c/json.h>
30 #include <libubox/blob.h>
31 #include <libubox/utils.h>
32 #include <libubox/list.h>
33 #include <libubox/vlist.h>
34 #include <libubox/blobmsg_json.h>
38 #define CERT_BUF_LEN 4096
57 static const struct blob_attr_info cert_policy[CERT_ATTR_MAX] = {
58 [CERT_ATTR_SIGNATURE] = { .type = BLOB_ATTR_BINARY },
59 [CERT_ATTR_PAYLOAD] = { .type = BLOB_ATTR_NESTED },
62 enum cert_payload_attr {
63 CERT_PL_ATTR_CERTTYPE,
65 CERT_PL_ATTR_VALIDFROMTIME,
66 CERT_PL_ATTR_EXPIRETIME,
68 CERT_PL_ATTR_KEY_FINGERPRINT,
78 static const struct blobmsg_policy cert_payload_policy[CERT_PL_ATTR_MAX] = {
79 [CERT_PL_ATTR_CERTTYPE] = { .name = "certtype", .type = BLOBMSG_TYPE_INT8 },
80 [CERT_PL_ATTR_CERTID] = { .name = "certid", .type = BLOBMSG_TYPE_INT64 },
81 [CERT_PL_ATTR_VALIDFROMTIME] = { .name = "validfrom", .type = BLOBMSG_TYPE_INT64 },
82 [CERT_PL_ATTR_EXPIRETIME] = { .name = "expiresat", .type = BLOBMSG_TYPE_INT64 },
83 [CERT_PL_ATTR_PUBKEY] = { .name = "pubkey", .type = BLOBMSG_TYPE_STRING },
84 [CERT_PL_ATTR_KEY_FINGERPRINT] = { .name = "fingerprint", .type = BLOBMSG_TYPE_STRING },
87 static int write_file(const char *filename, void *buf, size_t len, bool append) {
91 f = fopen(filename, append?"a":"w");
95 outlen = fwrite(buf, 1, len, f);
97 return (outlen == len);
100 static int cert_load(const char *certfile, struct blob_attr *certtb[]) {
103 char filebuf[CERT_BUF_LEN];
106 f = fopen(certfile, "r");
110 len = fread(&filebuf, 1, CERT_BUF_LEN - 1, f);
111 ret = ferror(f) || !feof(f);
115 ret = blob_parse(filebuf, certtb, cert_policy, CERT_ATTR_MAX);
116 fprintf(stderr, "blob_parse return %d\n", ret);
120 static int cert_append(const char *certfile, const char *pubkeyfile, const char *sigfile) {
121 fprintf(stderr, "not implemented\n");
125 static int cert_dump(const char *certfile) {
126 struct blob_attr *certtb[CERT_ATTR_MAX];
129 if (cert_load(certfile, certtb)) {
130 fprintf(stderr, "cannot parse cert\n");
134 for (i = 0; i < CERT_ATTR_MAX; i++) {
135 struct blob_attr *v = certtb[i];
140 switch(cert_policy[i].type) {
141 case BLOB_ATTR_BINARY:
142 fprintf(stdout, "signature: %s\n", blob_data(v));
144 case BLOB_ATTR_NESTED:
145 fprintf(stdout, "payload:\n%s\n", blobmsg_format_json(blob_data(v), true));
152 static int cert_issue(const char *certfile, const char *pubkeyfile, const char *seckeyfile) {
153 struct blob_buf certbuf;
154 struct blob_buf payloadbuf;
163 char fname[256], sfname[256];
165 char tmpdir[] = "/tmp/ucert-XXXXXX";
167 if (stat(certfile, &st) == 0) {
168 fprintf(stderr, "certfile %s exists, won't overwrite.\n", certfile);
172 pkf = fopen(pubkeyfile, "r");
176 pklen = fread(pkb, 1, 512, pkf);
177 pkb[pklen - 1] = '\0';
184 if (usign_f_pubkey(pkfp, pubkeyfile))
187 gettimeofday(&tv, NULL);
189 if (mkdtemp(tmpdir) == NULL)
192 while (revoker >= 0) {
193 blob_buf_init(&payloadbuf, 0);
194 blobmsg_add_u8(&payloadbuf, "certtype", revoker?CERTTYPE_REVOKE:CERTTYPE_AUTH);
195 blobmsg_add_u64(&payloadbuf, "validfrom", tv.tv_sec);
197 blobmsg_add_u64(&payloadbuf, "expiresat", tv.tv_sec + 60 * 60 * 24 * 365);
198 blobmsg_add_string(&payloadbuf, "pubkey", pkb);
200 blobmsg_add_string(&payloadbuf, "fingerprint", pkfp);
203 snprintf(fname, sizeof(fname) - 1, "%s/%s", tmpdir, revoker?"revoker":"payload");
204 write_file(fname, blob_data(payloadbuf.head), blob_len(payloadbuf.head), false);
206 snprintf(sfname, sizeof(sfname) - 1, "%s/%s", tmpdir, revoker?"revoker.sig":"payload.sig");
207 if (usign_s(fname, seckeyfile, sfname, quiet))
210 sigf = fopen(sfname, "r");
214 siglen = fread(sigb, 1, 1024, sigf);
218 sigb[siglen-1] = '\0';
224 blob_buf_init(&certbuf, 0);
225 blob_put(&certbuf, CERT_ATTR_SIGNATURE, sigb, siglen);
226 blob_put(&certbuf, CERT_ATTR_PAYLOAD, blob_data(payloadbuf.head), blob_len(payloadbuf.head));
227 snprintf(fname, sizeof(fname) - 1, "%s%s", certfile, revoker?".revoke":"");
228 write_file(fname, blob_data(certbuf.head), blob_len(certbuf.head), false);
237 static int cert_process_revoker(const char *certfile) {
238 fprintf(stderr, "not implemented\n");
242 static int cert_verify(const char *certfile, const char *pubkeyfile, const char *pubkeydir, const char *msgfile) {
243 fprintf(stderr, "not implemented\n");
247 static int usage(const char *cmd)
250 "Usage: %s <command> <options>\n"
252 " -A: append (needs -c and -p and/or -x)\n"
254 " -I: issue cert and revoker (needs -c and -p and -s)\n"
255 " -R: process revoker certificate (needs -c)\n"
256 " -V: verify (needs -c and -p|-P)\n"
258 " -c <file>: certificate file\n"
259 " -m <file>: message file (verify only)\n"
260 " -p <file>: public key file\n"
261 " -P <path>: public key directory (verify only)\n"
262 " -q: quiet (do not print verification result, use return code only)\n"
263 " -s <file>: secret key file (issue only)\n"
264 " -x <file>: signature file\n"
270 int main(int argc, char *argv[]) {
272 const char *msgfile = NULL;
273 const char *sigfile = NULL;
274 const char *pubkeyfile = NULL;
275 const char *pubkeydir = NULL;
276 const char *certfile = NULL;
277 const char *seckeyfile = NULL;
280 while ((ch = getopt(argc, argv, "ADIRVc:m:p:P:qs:x:")) != -1) {
319 return usage(argv[0]);
325 if (certfile && (pubkeyfile || sigfile))
326 return cert_append(certfile, pubkeyfile, sigfile);
328 return usage(argv[0]);
331 return cert_dump(certfile);
333 return usage(argv[0]);
335 if (certfile && pubkeyfile && seckeyfile)
336 return cert_issue(certfile, pubkeyfile, seckeyfile);
338 return usage(argv[0]);
341 return cert_process_revoker(certfile);
343 return usage(argv[0]);
345 if (certfile && (pubkeyfile || pubkeydir))
346 return cert_verify(certfile, pubkeyfile, pubkeydir, msgfile);
348 return usage(argv[0]);
350 return usage(argv[0]);
354 return usage(argv[0]);