1 // GPGEdit edits GPG encrypted files
2 // Copyright (C) 2018 Aaron Ball <nullspoon@oper.io>
3 //
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
8 //
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.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <https://www.gnu.org/licenses/>.
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <string.h>
20 #include <unistd.h>
21 #include <gpgme.h>
22
23 #include "gpg.h"
24 #include "gpg_keyids.h"
25 #include "strarray.h"
26
27 void system_edit(char* file) {
28 char cmd[256]; // Buffer for editor command
29 sprintf(cmd, "%s %s\n", "vim", file);
30 system(cmd);
31 }
32
33
34 int main(int argc, char* argv[]) {
35 char tmpfile[32] = "/tmp/gpgedit-XXXXXX";
36 gpgme_ctx_t decctx;
37 gpgme_error_t err;
38 char** keyids;
39
40 if(argc == 1) {
41 printf("Please specify a gpg encrypted file to edit\n");
42 return 1;
43 }
44
45 // Initialize decryption context, create tmp file to write decrypted contents
46 // to, and run decryption operation.
47 err = init_gpg(&decctx, GPGME_PROTOCOL_OPENPGP);
48 if(err != GPG_ERR_NO_ERROR) {
49 printf("Error: %s\n", gpgme_strerror(err));
50 return 1;
51 }
52
53 mkstemp(tmpfile);
54 gpgme_decrypt_result_t res = gpg_decrypt_file(argv[1], tmpfile, decctx);
55 // Get keyids array from recipients list
56 keyids = strarray_new();
57 gpg_keyids_load_from_recip(&keyids, res->recipients);
58 // Freedom!
59 gpgme_release(decctx);
60
61 // Open the system editor
62 system_edit(tmpfile);
63
64 // Re-encrypt the plaintext tmp file
65 //printf("Re-encrypting file '%s' -> '%s'\n", tmpfile, argv[1]);
66 gpg_encrypt_file(tmpfile, argv[1], keyids);
67
68 // Clean up tmpfile
69 strarray_release(&keyids);
70 unlink(tmpfile);
71 return 0;
72 }
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