2 * wrapper functions around the usign executable
3 * Copyright (C) 2018 Daniel Golle <daniel@makrotopia.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
23 #ifdef UCERT_HOST_BUILD
24 #define USIGN_EXEC "usign"
26 #define USIGN_EXEC "/usr/bin/usign"
30 * check for revoker deadlink in pubkeydir
31 * return true if a revoker exists, false otherwise
33 int _usign_key_is_revoked(const char *fingerprint, const char *pubkeydir) {
35 char rfname[256] = {0};
37 snprintf(rfname, sizeof(rfname)-1, "%s/%s", pubkeydir, fingerprint);
38 if (readlink(rfname, tml, sizeof(tml)) > 0 &&
39 !strcmp(tml, ".revoked.")) {
49 * return WEXITSTATUS or -1 if fork or execv fails
51 int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bool quiet) {
54 const char *usign_argv[16] = {0};
55 unsigned int usign_argc = 0;
57 usign_argv[usign_argc++] = USIGN_EXEC;
58 usign_argv[usign_argc++] = "-S";
59 usign_argv[usign_argc++] = "-m";
60 usign_argv[usign_argc++] = msgfile;
61 usign_argv[usign_argc++] = "-s";
62 usign_argv[usign_argc++] = seckeyfile;
63 usign_argv[usign_argc++] = "-x";
64 usign_argv[usign_argc++] = sigfile;
67 usign_argv[usign_argc++] = "-q";
75 if (execvp(usign_argv[0], (char *const *)usign_argv))
81 waitpid(pid, &status, 0);
82 return WEXITSTATUS(status);
88 int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bool quiet) {
94 * call usign -F ... and set fingerprint returned
95 * return WEXITSTATUS or -1 if fork or execv fails
97 static int usign_f(char *fingerprint, const char *pubkeyfile, const char *seckeyfile, const char *sigfile) {
101 const char *usign_argv[16] = {0};
102 unsigned int usign_argc = 0;
107 usign_argv[usign_argc++] = USIGN_EXEC;
108 usign_argv[usign_argc++] = "-F";
111 usign_argv[usign_argc++] = "-p";
112 usign_argv[usign_argc++] = pubkeyfile;
116 usign_argv[usign_argc++] = "-s";
117 usign_argv[usign_argc++] = seckeyfile;
121 usign_argv[usign_argc++] = "-x";
122 usign_argv[usign_argc++] = sigfile;
138 if (execvp(usign_argv[0], (char *const *)usign_argv))
144 waitpid(pid, &status, 0);
145 status = WEXITSTATUS(status);
146 if (fingerprint && !WEXITSTATUS(status)) {
148 memset(fingerprint, 0, 17);
149 r = read(fds[0], fingerprint, 17);
153 fingerprint[16] = '\0';
165 * call usign -F -p ...
167 int usign_f_pubkey(char *fingerprint, const char *pubkeyfile) {
168 return usign_f(fingerprint, pubkeyfile, NULL, NULL);
172 * call usign -F -s ...
174 int usign_f_seckey(char *fingerprint, const char *seckeyfile) {
175 return usign_f(fingerprint, NULL, seckeyfile, NULL);
179 * call usign -F -x ...
181 int usign_f_sig(char *fingerprint, const char *sigfile) {
182 return usign_f(fingerprint, NULL, NULL, sigfile);
188 * return WEXITSTATUS or -1 if fork or execv fails
190 int usign_v(const char *msgfile, const char *pubkeyfile,
191 const char *pubkeydir, const char *sigfile, bool quiet) {
194 const char *usign_argv[16] = {0};
195 unsigned int usign_argc = 0;
196 char fingerprint[17];
198 if (usign_f_sig(fingerprint, sigfile)) {
200 fprintf(stderr, "cannot get signing key fingerprint\n");
204 if (pubkeydir && _usign_key_is_revoked(fingerprint, pubkeydir)) {
206 fprintf(stderr, "key %s has been revoked!\n", fingerprint);
209 usign_argv[usign_argc++] = USIGN_EXEC;
210 usign_argv[usign_argc++] = "-V";
211 usign_argv[usign_argc++] = "-m";
212 usign_argv[usign_argc++] = msgfile;
215 usign_argv[usign_argc++] = "-q";
218 usign_argv[usign_argc++] = "-p";
219 usign_argv[usign_argc++] = pubkeyfile;
223 usign_argv[usign_argc++] = "-P";
224 usign_argv[usign_argc++] = pubkeydir;
228 usign_argv[usign_argc++] = "-x";
229 usign_argv[usign_argc++] = sigfile;
238 if (execvp(usign_argv[0], (char *const *)usign_argv))
244 waitpid(pid, &status, 0);
245 return WEXITSTATUS(status);