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/* $OpenBSD: uuencode.c,v 1.28 2015/04/24 01:36:24 deraadt Exp $ */ |
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/* |
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* Copyright (c) 2000 Markus Friedl. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <sys/types.h> |
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#include <netinet/in.h> |
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#include <resolv.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "xmalloc.h" |
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#include "uuencode.h" |
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/* |
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* Encode binary 'src' of length 'srclength', writing base64-encoded text |
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* to 'target' of size 'targsize'. Will always nul-terminate 'target'. |
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* Returns the number of bytes stored in 'target' or -1 on error (inc. |
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* 'targsize' too small). |
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*/ |
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int |
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uuencode(const u_char *src, u_int srclength, |
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char *target, size_t targsize) |
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{ |
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return __b64_ntop(src, srclength, target, targsize); |
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} |
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/* |
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* Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes. |
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* Will skip leading and trailing whitespace. Returns the number of bytes |
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* stored in 'target' or -1 on error (inc. targsize too small). |
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*/ |
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int |
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uudecode(const char *src, u_char *target, size_t targsize) |
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{ |
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int len; |
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char *encoded, *p; |
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/* copy the 'readonly' source */ |
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encoded = xstrdup(src); |
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/* skip whitespace and data */ |
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for (p = encoded; *p == ' ' || *p == '\t'; p++) |
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; |
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for (; *p != '\0' && *p != ' ' && *p != '\t'; p++) |
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; |
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/* and remove trailing whitespace because __b64_pton needs this */ |
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*p = '\0'; |
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len = __b64_pton(encoded, target, targsize); |
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free(encoded); |
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return len; |
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} |
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void |
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dump_base64(FILE *fp, const u_char *data, u_int len) |
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{ |
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char *buf; |
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int i, n; |
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if (len > 65536) { |
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fprintf(fp, "dump_base64: len > 65536\n"); |
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return; |
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} |
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buf = xreallocarray(NULL, 2, len); |
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n = uuencode(data, len, buf, 2*len); |
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for (i = 0; i < n; i++) { |
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fprintf(fp, "%c", buf[i]); |
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if (i % 70 == 69) |
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fprintf(fp, "\n"); |
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} |
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if (i % 70 != 69) |
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fprintf(fp, "\n"); |
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free(buf); |
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} |