uuencode.c revision 1.4
1/* $NetBSD: uuencode.c,v 1.4 2011/07/25 03:03:11 christos Exp $ */ 2/* $OpenBSD: uuencode.c,v 1.26 2010/08/31 11:54:45 djm Exp $ */ 3/* 4 * Copyright (c) 2000 Markus Friedl. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "includes.h" 28__RCSID("$NetBSD: uuencode.c,v 1.4 2011/07/25 03:03:11 christos Exp $"); 29#include <sys/types.h> 30#include <netinet/in.h> 31#include <resolv.h> 32#include <stdio.h> 33 34#include "xmalloc.h" 35#include "uuencode.h" 36 37/* 38 * Encode binary 'src' of length 'srclength', writing base64-encoded text 39 * to 'target' of size 'targsize'. Will always nul-terminate 'target'. 40 * Returns the number of bytes stored in 'target' or -1 on error (inc. 41 * 'targsize' too small). 42 */ 43int 44uuencode(const u_char *src, u_int srclength, 45 char *target, size_t targsize) 46{ 47 return __b64_ntop(src, srclength, target, targsize); 48} 49 50/* 51 * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes. 52 * Will skip leading and trailing whitespace. Returns the number of bytes 53 * stored in 'target' or -1 on error (inc. targsize too small). 54 */ 55int 56uudecode(const char *src, u_char *target, size_t targsize) 57{ 58 int len; 59 char *encoded, *p; 60 61 /* copy the 'readonly' source */ 62 encoded = xstrdup(src); 63 /* skip whitespace and data */ 64 for (p = encoded; *p == ' ' || *p == '\t'; p++) 65 ; 66 for (; *p != '\0' && *p != ' ' && *p != '\t'; p++) 67 ; 68 /* and remove trailing whitespace because __b64_pton needs this */ 69 *p = '\0'; 70 len = __b64_pton(encoded, target, targsize); 71 xfree(encoded); 72 return len; 73} 74 75void 76dump_base64(FILE *fp, const u_char *data, u_int len) 77{ 78 char *buf; 79 int i, n; 80 81 if (len > 65536) { 82 fprintf(fp, "dump_base64: len > 65536\n"); 83 return; 84 } 85 buf = xmalloc(2*len); 86 n = uuencode(data, len, buf, 2*len); 87 for (i = 0; i < n; i++) { 88 fprintf(fp, "%c", buf[i]); 89 if (i % 70 == 69) 90 fprintf(fp, "\n"); 91 } 92 if (i % 70 != 69) 93 fprintf(fp, "\n"); 94 xfree(buf); 95} 96