2 * tfcrypt -- high security Threefish encryption tool.
4 * tfcrypt is copyrighted:
5 * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
7 * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
9 * Permission is hereby granted, free of charge, to any person obtaining
10 * a copy of this software and associated documentation files (the
11 * "Software"), to deal in the Software without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
23 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
24 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 void do_edbase64(char **fargv)
33 struct base64_decodestate dstate;
34 struct base64_encodestate estate;
40 if (!strcmp(fargv[0], "-")) sfd = 0;
42 sfd = open(fargv[0], O_RDONLY | O_LARGEFILE);
43 if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
44 xerror(YES, NO, YES, "stat(%s)", fargv[0]);
46 if (sfd == -1) xerror(NO, NO, YES, "%s", fargv[0]);
49 if (fargv[0] && fargv[1]) {
50 if (!strcmp(fargv[1], "-")) dfd = 1;
51 else dfd = open(fargv[1], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
52 if (dfd == -1) xerror(NO, NO, YES, "%s", fargv[1]);
55 if (do_edcrypt == TFC_DO_ENCRYPT) {
56 memset(&estate, 0, sizeof(struct base64_encodestate));
57 base64_init_encodestate(&estate);
59 else if (do_edcrypt == TFC_DO_DECRYPT) {
60 memset(&dstate, 0, sizeof(struct base64_decodestate));
61 base64_init_decodestate(&dstate);
69 lblock = lrem = do_edcrypt == TFC_DO_DECRYPT ? TFC_B64_DWIDTH : TFC_B64_EWIDTH;
71 _again: lio = read(sfd, pblk, lrem);
72 if (lio == 0) do_stop = YES;
73 if (lio != NOSIZE) ldone += lio;
75 if (errno != EIO && catch_all_errors != YES)
76 xerror(NO, NO, NO, "%s", fargv[0]);
77 switch (error_action) {
78 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", fargv[0]); goto _again; break;
80 xerror(YES, NO, NO, "%s", fargv[0]);
81 lio = ldone = lrem = lblock;
82 memset(srcblk, 0, lio);
83 lseek(sfd, lio, SEEK_CUR);
85 default: xerror(NO, NO, NO, "%s", fargv[0]); break;
88 if (lio && lio < lrem) {
94 if (do_edcrypt == TFC_DO_ENCRYPT) {
96 base64_encode_block((const char *)srcblk, ldone, (char *)dstblk, &estate);
100 else if (do_edcrypt == TFC_DO_DECRYPT) {
102 base64_decode_block((const char *)srcblk, ldone, (char *)dstblk, sizeof(dstblk), &dstate);
103 ldone = dstate.count;
108 do_stop = TFC_STOP_FULL;
113 _wagain: lio = write(dfd, pblk, lrem);
114 if (lio != NOSIZE) ldone += lio;
115 else xerror(NO, NO, NO, "%s", fargv[1]);
116 if (do_edcrypt == TFC_DO_ENCRYPT) {
118 if (lread >= lblock || do_stop == TFC_STOP_FULL) {
119 t = write(dfd, "\n", 1);
120 if (t != NOSIZE) lio += t;
124 if (lio != NOSIZE) ldone += lio;
125 else xerror(NO, NO, NO, "%s", fargv[1]);
126 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", fargv[1]);
134 if (do_edcrypt == TFC_DO_ENCRYPT && do_stop == TFC_STOP_BEGAN) {
135 size_t t = estate.count;
136 pblk = dstblk + estate.count;
137 base64_encode_blockend((char *)dstblk, &estate);
138 lrem = estate.count - t;
140 do_stop = TFC_STOP_FULL;
144 memset(&estate, 0, sizeof(struct base64_encodestate));
145 memset(&dstate, 0, sizeof(struct base64_decodestate));
146 if (do_preserve_time) fcopy_matime(dfd, &s_stat);
150 static void base64_eprint(FILE *where, struct base64_encodestate *estate, const char *input, size_t inputl)
156 memset(t, 0, sizeof(t));
158 base64_encode_block(input, ix > 128 ? 128 : ix, t, estate);
160 if (ix < 128) base64_encode_blockend(t, estate);
161 fprintf(where, "%s", t);
165 memset(t, 0, sizeof(t));
168 void tfc_printbase64(FILE *where, const void *p, size_t n, tfc_yesno nl)
170 struct base64_encodestate estate;
171 memset(&estate, 0, sizeof(struct base64_encodestate));
172 base64_eprint(where, &estate, (const char *)p, n);
173 if (nl) tfc_nfsay(where, "\n");