1295367Sdes/* $OpenBSD: uuencode.c,v 1.28 2015/04/24 01:36:24 deraadt Exp $ */ 260573Skris/* 360573Skris * Copyright (c) 2000 Markus Friedl. All rights reserved. 465668Skris * 565668Skris * Redistribution and use in source and binary forms, with or without 665668Skris * modification, are permitted provided that the following conditions 765668Skris * are met: 865668Skris * 1. Redistributions of source code must retain the above copyright 965668Skris * notice, this list of conditions and the following disclaimer. 1065668Skris * 2. Redistributions in binary form must reproduce the above copyright 1165668Skris * notice, this list of conditions and the following disclaimer in the 1265668Skris * documentation and/or other materials provided with the distribution. 1365668Skris * 1465668Skris * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1565668Skris * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1665668Skris * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1765668Skris * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1865668Skris * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 1965668Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2065668Skris * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2165668Skris * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2265668Skris * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2365668Skris * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2460573Skris */ 2565668Skris 2660573Skris#include "includes.h" 27106121Sdes 28162852Sdes#include <sys/types.h> 29162852Sdes#include <netinet/in.h> 30162852Sdes#include <resolv.h> 31162852Sdes#include <stdio.h> 32255767Sdes#include <stdlib.h> 33162852Sdes 3460573Skris#include "xmalloc.h" 3576259Sgreen#include "uuencode.h" 3660573Skris 37197679Sdes/* 38197679Sdes * Encode binary 'src' of length 'srclength', writing base64-encoded text 39197679Sdes * to 'target' of size 'targsize'. Will always nul-terminate 'target'. 40197679Sdes * Returns the number of bytes stored in 'target' or -1 on error (inc. 41197679Sdes * 'targsize' too small). 42197679Sdes */ 4360573Skrisint 44126274Sdesuuencode(const u_char *src, u_int srclength, 4560573Skris char *target, size_t targsize) 4660573Skris{ 4760573Skris return __b64_ntop(src, srclength, target, targsize); 4860573Skris} 4960573Skris 50197679Sdes/* 51197679Sdes * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes. 52197679Sdes * Will skip leading and trailing whitespace. Returns the number of bytes 53197679Sdes * stored in 'target' or -1 on error (inc. targsize too small). 54197679Sdes */ 5560573Skrisint 5676259Sgreenuudecode(const char *src, u_char *target, size_t targsize) 5760573Skris{ 5860573Skris int len; 5960573Skris char *encoded, *p; 6060573Skris 6160573Skris /* copy the 'readonly' source */ 6260573Skris encoded = xstrdup(src); 6360573Skris /* skip whitespace and data */ 6460573Skris for (p = encoded; *p == ' ' || *p == '\t'; p++) 6560573Skris ; 6660573Skris for (; *p != '\0' && *p != ' ' && *p != '\t'; p++) 6760573Skris ; 6892555Sdes /* and remove trailing whitespace because __b64_pton needs this */ 6960573Skris *p = '\0'; 7060573Skris len = __b64_pton(encoded, target, targsize); 71255767Sdes free(encoded); 7260573Skris return len; 7360573Skris} 7460573Skris 7560573Skrisvoid 76221420Sdesdump_base64(FILE *fp, const u_char *data, u_int len) 7760573Skris{ 78162852Sdes char *buf; 7960573Skris int i, n; 8076259Sgreen 81162852Sdes if (len > 65536) { 82162852Sdes fprintf(fp, "dump_base64: len > 65536\n"); 83162852Sdes return; 84162852Sdes } 85295367Sdes buf = xreallocarray(NULL, 2, len); 8660573Skris n = uuencode(data, len, buf, 2*len); 8760573Skris for (i = 0; i < n; i++) { 8860573Skris fprintf(fp, "%c", buf[i]); 8960573Skris if (i % 70 == 69) 9060573Skris fprintf(fp, "\n"); 9160573Skris } 9260573Skris if (i % 70 != 69) 9360573Skris fprintf(fp, "\n"); 94255767Sdes free(buf); 9560573Skris} 96