2ab2cd3c434bee4f5f8110feaa3feabab4591c82
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 #define USIGN_EXEC "/usr/bin/usign"
26 * check for revoker deadlink in pubkeydir
27 * return true if a revoker exists, false otherwise
29 int _usign_key_is_revoked(const char *fingerprint
, const char *pubkeydir
) {
31 char rfname
[256] = {0};
33 snprintf(rfname
, sizeof(rfname
)-1, "%s/%s", pubkeydir
, fingerprint
);
34 if (readlink(rfname
, tml
, sizeof(tml
)) > 0 &&
35 !strcmp(tml
, ".revoked.")) {
45 * return WEXITSTATUS or -1 if fork or execv fails
47 int usign_s(const char *msgfile
, const char *seckeyfile
, const char *sigfile
, bool quiet
) {
50 const char *usign_argv
[16] = {0};
51 unsigned int usign_argc
= 0;
53 usign_argv
[usign_argc
++] = USIGN_EXEC
;
54 usign_argv
[usign_argc
++] = "-S";
55 usign_argv
[usign_argc
++] = "-m";
56 usign_argv
[usign_argc
++] = msgfile
;
57 usign_argv
[usign_argc
++] = "-s";
58 usign_argv
[usign_argc
++] = seckeyfile
;
59 usign_argv
[usign_argc
++] = "-x";
60 usign_argv
[usign_argc
++] = sigfile
;
63 usign_argv
[usign_argc
++] = "-q";
71 if (execv(usign_argv
[0], usign_argv
))
77 waitpid(pid
, &status
, 0);
78 return WEXITSTATUS(status
);
84 int usign_s(const char *msgfile
, const char *seckeyfile
, const char *sigfile
, bool quiet
) {
90 * call usign -F ... and set fingerprint returned
91 * return WEXITSTATUS or -1 if fork or execv fails
93 static int usign_f(char *fingerprint
, const char *pubkeyfile
, const char *seckeyfile
, const char *sigfile
) {
97 const char *usign_argv
[16] = {0};
98 unsigned int usign_argc
= 0;
103 usign_argv
[usign_argc
++] = USIGN_EXEC
;
104 usign_argv
[usign_argc
++] = "-F";
107 usign_argv
[usign_argc
++] = "-p";
108 usign_argv
[usign_argc
++] = pubkeyfile
;
112 usign_argv
[usign_argc
++] = "-s";
113 usign_argv
[usign_argc
++] = seckeyfile
;
117 usign_argv
[usign_argc
++] = "-x";
118 usign_argv
[usign_argc
++] = sigfile
;
134 if (execv(usign_argv
[0], usign_argv
))
140 waitpid(pid
, &status
, 0);
141 status
= WEXITSTATUS(status
);
142 if (fingerprint
&& !WEXITSTATUS(status
)) {
143 memset(fingerprint
, 0, 17);
144 read(fds
[0], fingerprint
, 17);
145 if (fingerprint
[16] != '\n')
148 fingerprint
[16] = '\0';
160 * call usign -F -p ...
162 int usign_f_pubkey(char *fingerprint
, const char *pubkeyfile
) {
163 return usign_f(fingerprint
, pubkeyfile
, NULL
, NULL
);
167 * call usign -F -s ...
169 int usign_f_seckey(char *fingerprint
, const char *seckeyfile
) {
170 return usign_f(fingerprint
, NULL
, seckeyfile
, NULL
);
174 * call usign -F -x ...
176 int usign_f_sig(char *fingerprint
, const char *sigfile
) {
177 return usign_f(fingerprint
, NULL
, NULL
, sigfile
);
183 * return WEXITSTATUS or -1 if fork or execv fails
185 int usign_v(const char *msgfile
, const char *pubkeyfile
,
186 const char *pubkeydir
, const char *sigfile
, bool quiet
) {
189 const char *usign_argv
[16] = {0};
190 unsigned int usign_argc
= 0;
191 char fingerprint
[17];
193 if (usign_f_sig(fingerprint
, sigfile
)) {
195 fprintf(stdout
, "cannot get signing key fingerprint\n");
199 if (pubkeydir
&& _usign_key_is_revoked(fingerprint
, pubkeydir
)) {
201 fprintf(stdout
, "key %s has been revoked!\n", fingerprint
);
204 usign_argv
[usign_argc
++] = USIGN_EXEC
;
205 usign_argv
[usign_argc
++] = "-V";
206 usign_argv
[usign_argc
++] = "-m";
207 usign_argv
[usign_argc
++] = msgfile
;
210 usign_argv
[usign_argc
++] = "-q";
213 usign_argv
[usign_argc
++] = "-p";
214 usign_argv
[usign_argc
++] = pubkeyfile
;
218 usign_argv
[usign_argc
++] = "-P";
219 usign_argv
[usign_argc
++] = pubkeydir
;
223 usign_argv
[usign_argc
++] = "-x";
224 usign_argv
[usign_argc
++] = sigfile
;
233 if (execv(usign_argv
[0], usign_argv
))
239 waitpid(pid
, &status
, 0);
240 return WEXITSTATUS(status
);