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1 | /* $OpenBSD: uuencode.c,v 1.25 2009/03/05 11:30:50 djm Exp $ */ | |
2 | /* | |
3 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
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 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | */ | |
25 | ||
26 | #include "includes.h" | |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <netinet/in.h> | |
30 | #include <resolv.h> | |
31 | #include <stdio.h> | |
32 | ||
33 | #include "xmalloc.h" | |
34 | #include "uuencode.h" | |
35 | ||
36 | /* | |
37 | * Encode binary 'src' of length 'srclength', writing base64-encoded text | |
38 | * to 'target' of size 'targsize'. Will always nul-terminate 'target'. | |
39 | * Returns the number of bytes stored in 'target' or -1 on error (inc. | |
40 | * 'targsize' too small). | |
41 | */ | |
42 | int | |
43 | uuencode(const u_char *src, u_int srclength, | |
44 | char *target, size_t targsize) | |
45 | { | |
46 | return __b64_ntop(src, srclength, target, targsize); | |
47 | } | |
48 | ||
49 | /* | |
50 | * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes. | |
51 | * Will skip leading and trailing whitespace. Returns the number of bytes | |
52 | * stored in 'target' or -1 on error (inc. targsize too small). | |
53 | */ | |
54 | int | |
55 | uudecode(const char *src, u_char *target, size_t targsize) | |
56 | { | |
57 | int len; | |
58 | char *encoded, *p; | |
59 | ||
60 | /* copy the 'readonly' source */ | |
61 | encoded = xstrdup(src); | |
62 | /* skip whitespace and data */ | |
63 | for (p = encoded; *p == ' ' || *p == '\t'; p++) | |
64 | ; | |
65 | for (; *p != '\0' && *p != ' ' && *p != '\t'; p++) | |
66 | ; | |
67 | /* and remove trailing whitespace because __b64_pton needs this */ | |
68 | *p = '\0'; | |
69 | len = __b64_pton(encoded, target, targsize); | |
70 | xfree(encoded); | |
71 | return len; | |
72 | } | |
73 | ||
74 | void | |
75 | dump_base64(FILE *fp, u_char *data, u_int len) | |
76 | { | |
77 | char *buf; | |
78 | int i, n; | |
79 | ||
80 | if (len > 65536) { | |
81 | fprintf(fp, "dump_base64: len > 65536\n"); | |
82 | return; | |
83 | } | |
84 | buf = xmalloc(2*len); | |
85 | n = uuencode(data, len, buf, 2*len); | |
86 | for (i = 0; i < n; i++) { | |
87 | fprintf(fp, "%c", buf[i]); | |
88 | if (i % 70 == 69) | |
89 | fprintf(fp, "\n"); | |
90 | } | |
91 | if (i % 70 != 69) | |
92 | fprintf(fp, "\n"); | |
93 | xfree(buf); | |
94 | } |