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 "gpgedit_config.h"
25 #include "strll.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 void parseargs(int argc, char* argv[], struct gpgedit_config* config) {
35 int i = 1;
36
37 while(i < argc) {
38 if(strcmp(argv[i], "-r") == 0 || strcmp(argv[i], "--recipient") == 0) {
39 i++;
40 //printf("Adding recipient %s\n", argv[i]);
41 strll_add(config->recipients, argv[i]);
42 } else {
43 gpgedit_config_file_set(config, argv[i]);
44 }
45 i++;
46 }
47 }
48
49
50 int main(int argc, char* argv[]) {
51 char tmpfile[32] = "/tmp/gpgedit-XXXXXX";
52 gpgme_ctx_t decctx;
53 gpgme_error_t err;
54 struct gpgedit_config* config;
55
56 if(argc == 1) {
57 printf("Please specify a gpg encrypted file to edit\n");
58 return 1;
59 }
60
61 config = gpgedit_config_new();
62 parseargs(argc, argv, config);
63
64 // Initialize decryption context, create tmp file to write decrypted contents
65 // to, and run decryption operation.
66 err = init_gpg(&decctx, GPGME_PROTOCOL_OPENPGP);
67 if(err != GPG_ERR_NO_ERROR) {
68 printf("Error: %s\n", gpgme_strerror(err));
69 return 1;
70 }
71
72 mkstemp(tmpfile);
73 gpgme_decrypt_result_t res = gpg_decrypt_file(config->file, tmpfile, decctx);
74 // Get keyids array from recipients list
75 gpgedit_config_recip_from_gpgme_recip(config, res->recipients);
76 // Freedom!
77 gpgme_release(decctx);
78
79 // Open the system editor
80 system_edit(tmpfile);
81
82 printf("Recipients:\n");
83 strll_dump(config->recipients);
84
85 // Re-encrypt the plaintext tmp file
86 //printf("Re-encrypting file '%s' -> '%s'\n", tmpfile, config->file);
87 gpg_encrypt_file(tmpfile, config->file, config->recipients);
88
89 // Clean up tmpfile
90 gpgedit_config_release(config);
91 unlink(tmpfile);
92 return 0;
93 }
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