2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static const char copyright[] =
33 "@(#) Copyright (c) 1983, 1993\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
47 * create the specified file, decoding as you go.
50 #include <sys/param.h>
51 #include <sys/socket.h>
54 #include <netinet/in.h>
68 static const char *infile, *outfile;
69 static FILE *infp, *outfp;
70 static int base64, cflag, iflag, oflag, pflag, rflag, sflag;
72 static void usage(void);
73 static int decode(void);
74 static int decode2(void);
75 static int uu_decode(void);
76 static int base64_decode(void);
79 main(int argc, char *argv[])
83 if (strcmp(basename(argv[0]), "b64decode") == 0)
86 while ((ch = getopt(argc, argv, "cimo:prs")) != -1) {
91 cflag = 1; /* multiple uudecode'd files */
94 iflag = 1; /* ask before override files */
100 if (cflag || pflag || rflag || sflag)
102 oflag = 1; /* output to the specified file */
103 sflag = 1; /* do not strip pathnames for output */
104 outfile = optarg; /* set the output filename */
109 pflag = 1; /* print output to stdout */
114 rflag = 1; /* decode raw data */
119 sflag = 1; /* do not strip pathnames for output */
131 infp = fopen(infile = *argv, "r");
154 /* relaxed alternative to decode2() */
155 outfile = "/dev/stdout";
158 return (base64_decode());
160 return (uu_decode());
164 warnx("%s: missing or bad \"begin\" line", infile);
167 for (r = v; cflag; r |= v) {
184 char buf[MAXPATHLEN + 1];
187 /* search for header line */
189 if (fgets(buf, sizeof(buf), infp) == NULL)
192 if (strncmp(p, "begin-base64 ", 13) == 0) {
195 } else if (strncmp(p, "begin ", 6) == 0)
199 /* p points to mode */
204 /* q points to filename */
206 while (n > 0 && (q[n-1] == '\n' || q[n-1] == '\r'))
208 /* found valid header? */
214 if (handle == NULL) {
215 warnx("%s: unable to parse file mode", infile);
218 mode = getmode(handle, 0) & 0666;
222 /* don't strip, so try ~user/file expansion */
229 pw = getpwnam(q + 1);
233 n = strlen(pw->pw_dir);
237 if (sizeof(buf) < n + m) {
238 warnx("%s: bad output filename",
242 p = memmove(buf + n, p, m);
244 q = memcpy(p - n, pw->pw_dir, n);
247 /* strip down to leaf name */
255 /* POSIX says "/dev/stdout" is a 'magic cookie' not a special file. */
256 if (pflag || strcmp(outfile, "/dev/stdout") == 0)
259 flags = O_WRONLY | O_CREAT | O_EXCL;
260 if (lstat(outfile, &st) == 0) {
262 warnc(EEXIST, "%s: %s", infile, outfile);
265 switch (st.st_mode & S_IFMT) {
268 /* avoid symlink attacks */
269 if (unlink(outfile) == 0 || errno == ENOENT)
271 warn("%s: unlink %s", infile, outfile);
274 warnc(EISDIR, "%s: %s", infile, outfile);
278 /* trust command-line names */
282 warnc(EEXIST, "%s: %s", infile, outfile);
285 } else if (errno != ENOENT) {
286 warn("%s: %s", infile, outfile);
289 if ((fd = open(outfile, flags, mode)) < 0 ||
290 (outfp = fdopen(fd, "w")) == NULL) {
291 warn("%s: %s", infile, outfile);
297 return (base64_decode());
299 return (uu_decode());
303 getline(char *buf, size_t size)
306 if (fgets(buf, size, infp) != NULL)
310 warnx("%s: %s: short file", infile, outfile);
315 checkend(const char *ptr, const char *end, const char *msg)
320 if (strncmp(ptr, end, n) != 0 ||
321 strspn(ptr + n, " \t\r\n") != strlen(ptr + n)) {
322 warnx("%s: %s: %s", infile, outfile, msg);
325 if (fclose(outfp) != 0) {
326 warn("%s: %s", infile, outfile);
337 char buf[MAXPATHLEN+1];
339 /* for each input line */
341 switch (getline(buf, sizeof(buf))) {
348 #define DEC(c) (((c) - ' ') & 077) /* single character decode */
349 #define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) )
351 #define OUT_OF_RANGE do { \
352 warnx("%s: %s: character out of range: [%d-%d]", \
353 infile, outfile, 1 + ' ', 077 + ' ' + 1); \
358 * `i' is used to avoid writing out all the characters
359 * at the end of the file.
362 if ((i = DEC(*p)) <= 0)
364 for (++p; i > 0; p += 4, i -= 3)
366 if (!(IS_DEC(*p) && IS_DEC(*(p + 1)) &&
367 IS_DEC(*(p + 2)) && IS_DEC(*(p + 3))))
370 ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
372 ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
374 ch = DEC(p[2]) << 6 | DEC(p[3]);
378 if (!(IS_DEC(*p) && IS_DEC(*(p + 1))))
380 ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
384 if (!(IS_DEC(*(p + 1)) &&
388 ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
392 if (!(IS_DEC(*(p + 2)) &&
395 ch = DEC(p[2]) << 6 | DEC(p[3]);
400 switch (getline(buf, sizeof(buf))) {
406 return (checkend(buf, "end", "no \"end\" line"));
413 int n, count, count4;
414 char inbuf[MAXPATHLEN + 1], *p;
415 unsigned char outbuf[MAXPATHLEN * 4];
416 char leftover[MAXPATHLEN + 1];
420 strcpy(inbuf, leftover);
421 switch (getline(inbuf + strlen(inbuf),
422 sizeof(inbuf) - strlen(inbuf))) {
434 * Base64 encoded strings have the following
435 * characters in them: A-Z, a-z, 0-9 and +, / and =
437 if (isalnum(*p) || *p == '+' || *p == '/' || *p == '=')
444 strcpy(leftover, inbuf + count4 + 1);
445 inbuf[count4 + 1] = 0;
447 n = b64_pton(inbuf, outbuf, sizeof(outbuf));
451 fwrite(outbuf, 1, n, outfp);
453 return (checkend(inbuf, "====", "error decoding base64 input stream"));
460 (void)fprintf(stderr,
461 "usage: uudecode [-cimprs] [file ...]\n"
462 " uudecode [-i] -o output_file [file]\n"
463 " b64decode [-cimprs] [file ...]\n"
464 " b64decode [-i] -o output_file [file]\n");