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.
24 * check for revoker deadlink in pubkeydir
25 * return true if a revoker exists, false otherwise
27 int _usign_key_is_revoked(const char *fingerprint, const char *pubkeydir) {
29 char rfname[256] = {0};
31 snprintf(rfname, sizeof(rfname)-1, "%s/%s", pubkeydir, fingerprint);
32 if (readlink(rfname, tml, sizeof(tml)) > 0 &&
33 !strcmp(tml, ".revoked.")) {
42 * return WEXITSTATUS or -1 if fork or execv fails
44 int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bool quiet) {
47 const char *usign_argv[16] = {0};
48 unsigned int usign_argc = 0;
50 usign_argv[usign_argc++] = "/usr/bin/usign";
51 usign_argv[usign_argc++] = "-S";
52 usign_argv[usign_argc++] = "-m";
53 usign_argv[usign_argc++] = msgfile;
54 usign_argv[usign_argc++] = "-s";
55 usign_argv[usign_argc++] = seckeyfile;
56 usign_argv[usign_argc++] = "-x";
57 usign_argv[usign_argc++] = sigfile;
60 usign_argv[usign_argc++] = "-q";
68 if (execv(usign_argv[0], usign_argv))
74 waitpid(pid, &status, 0);
75 return WEXITSTATUS(status);
82 * call usign -F ... and set fingerprint returned
83 * return WEXITSTATUS or -1 if fork or execv fails
85 static int usign_f(char *fingerprint, const char *pubkeyfile, const char *seckeyfile, const char *sigfile) {
89 const char *usign_argv[16] = {0};
90 unsigned int usign_argc = 0;
95 usign_argv[usign_argc++] = "/usr/bin/usign";
96 usign_argv[usign_argc++] = "-F";
99 usign_argv[usign_argc++] = "-p";
100 usign_argv[usign_argc++] = pubkeyfile;
104 usign_argv[usign_argc++] = "-s";
105 usign_argv[usign_argc++] = seckeyfile;
109 usign_argv[usign_argc++] = "-x";
110 usign_argv[usign_argc++] = sigfile;
126 if (execv(usign_argv[0], usign_argv))
132 waitpid(pid, &status, 0);
133 if (fingerprint && !WEXITSTATUS(status)) {
134 memset(fingerprint, 0, 16);
135 read(fds[0], fingerprint, 16);
136 fingerprint[16] = '\0';
140 return WEXITSTATUS(status);
147 * call usign -F -p ...
149 int usign_f_pubkey(char *fingerprint, const char *pubkeyfile) {
150 return usign_f(fingerprint, pubkeyfile, NULL, NULL);
154 * call usign -F -s ...
156 int usign_f_seckey(char *fingerprint, const char *seckeyfile) {
157 return usign_f(fingerprint, NULL, seckeyfile, NULL);
161 * call usign -F -x ...
163 int usign_f_sig(char *fingerprint, const char *sigfile) {
164 return usign_f(fingerprint, NULL, NULL, sigfile);
170 * return WEXITSTATUS or -1 if fork or execv fails
172 int usign_v(const char *msgfile, const char *pubkeyfile,
173 const char *pubkeydir, const char *sigfile, bool quiet) {
176 const char *usign_argv[16] = {0};
177 unsigned int usign_argc = 0;
178 char fingerprint[17];
180 if (usign_f_sig(fingerprint, sigfile))
183 if (pubkeydir && _usign_key_is_revoked(fingerprint, pubkeydir))
186 usign_argv[usign_argc++] = "/usr/bin/usign";
187 usign_argv[usign_argc++] = "-V";
188 usign_argv[usign_argc++] = "-m";
189 usign_argv[usign_argc++] = msgfile;
192 usign_argv[usign_argc++] = "-q";
195 usign_argv[usign_argc++] = "-p";
196 usign_argv[usign_argc++] = pubkeyfile;
200 usign_argv[usign_argc++] = "-P";
201 usign_argv[usign_argc++] = pubkeydir;
205 usign_argv[usign_argc++] = "-x";
206 usign_argv[usign_argc++] = sigfile;
215 if (execv(usign_argv[0], usign_argv))
221 waitpid(pid, &status, 0);
222 return WEXITSTATUS(status);