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";
76 #ifdef UCERT_HOST_BUILD
77 execvp(usign_argv[0], (char *const *)usign_argv)
79 execv(usign_argv[0], (char *const *)usign_argv)
87 waitpid(pid, &status, 0);
88 return WEXITSTATUS(status);
94 int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bool quiet) {
100 * call usign -F ... and set fingerprint returned
101 * return WEXITSTATUS or -1 if fork or execv fails
103 static int usign_f(char *fingerprint, const char *pubkeyfile, const char *seckeyfile, const char *sigfile) {
107 const char *usign_argv[16] = {0};
108 unsigned int usign_argc = 0;
113 usign_argv[usign_argc++] = USIGN_EXEC;
114 usign_argv[usign_argc++] = "-F";
117 usign_argv[usign_argc++] = "-p";
118 usign_argv[usign_argc++] = pubkeyfile;
122 usign_argv[usign_argc++] = "-s";
123 usign_argv[usign_argc++] = seckeyfile;
127 usign_argv[usign_argc++] = "-x";
128 usign_argv[usign_argc++] = sigfile;
145 #ifdef UCERT_HOST_BUILD
146 execvp(usign_argv[0], (char *const *)usign_argv)
148 execv(usign_argv[0], (char *const *)usign_argv)
156 waitpid(pid, &status, 0);
157 status = WEXITSTATUS(status);
158 if (fingerprint && !WEXITSTATUS(status)) {
160 memset(fingerprint, 0, 17);
161 r = read(fds[0], fingerprint, 17);
165 fingerprint[16] = '\0';
177 * call usign -F -p ...
179 int usign_f_pubkey(char *fingerprint, const char *pubkeyfile) {
180 return usign_f(fingerprint, pubkeyfile, NULL, NULL);
184 * call usign -F -s ...
186 int usign_f_seckey(char *fingerprint, const char *seckeyfile) {
187 return usign_f(fingerprint, NULL, seckeyfile, NULL);
191 * call usign -F -x ...
193 int usign_f_sig(char *fingerprint, const char *sigfile) {
194 return usign_f(fingerprint, NULL, NULL, sigfile);
200 * return WEXITSTATUS or -1 if fork or execv fails
202 int usign_v(const char *msgfile, const char *pubkeyfile,
203 const char *pubkeydir, const char *sigfile, bool quiet) {
206 const char *usign_argv[16] = {0};
207 unsigned int usign_argc = 0;
208 char fingerprint[17];
210 if (usign_f_sig(fingerprint, sigfile)) {
212 fprintf(stderr, "cannot get signing key fingerprint\n");
216 if (pubkeydir && _usign_key_is_revoked(fingerprint, pubkeydir)) {
218 fprintf(stderr, "key %s has been revoked!\n", fingerprint);
221 usign_argv[usign_argc++] = USIGN_EXEC;
222 usign_argv[usign_argc++] = "-V";
223 usign_argv[usign_argc++] = "-m";
224 usign_argv[usign_argc++] = msgfile;
227 usign_argv[usign_argc++] = "-q";
230 usign_argv[usign_argc++] = "-p";
231 usign_argv[usign_argc++] = pubkeyfile;
235 usign_argv[usign_argc++] = "-P";
236 usign_argv[usign_argc++] = pubkeydir;
240 usign_argv[usign_argc++] = "-x";
241 usign_argv[usign_argc++] = sigfile;
251 #ifdef UCERT_HOST_BUILD
252 execvp(usign_argv[0], (char *const *)usign_argv)
254 execv(usign_argv[0], (char *const *)usign_argv)
262 waitpid(pid, &status, 0);
263 return WEXITSTATUS(status);