1 /* $OpenBSD: uuencode.c,v 1.28 2015/04/24 01:36:24 deraadt 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 #include <stdlib.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 */ 43 int 44 uuencode(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 */ 55 int 56 uudecode(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 free(encoded); 72 return len; 73 } 74 75 void 76 dump_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 = xreallocarray(NULL, 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 free(buf); 95 } 96
