+/* $OpenBSD: uuencode.c,v 1.25 2009/03/05 11:30:50 djm Exp $ */
/*
- * base-64 encoding pinched from lynx2-7-2, who pinched it from rpem.
- * Originally written by Mark Riordan 12 August 1990 and 17 Feb 1991
- * and placed in the public domain.
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
*
- * Dug Song <dugsong@UMICH.EDU>
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
-#include "xmalloc.h"
-char six2pr[64] = {
- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
- 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
- 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
-};
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <stdio.h>
-unsigned char pr2six[256];
+#include "xmalloc.h"
+#include "uuencode.h"
+/*
+ * Encode binary 'src' of length 'srclength', writing base64-encoded text
+ * to 'target' of size 'targsize'. Will always nul-terminate 'target'.
+ * Returns the number of bytes stored in 'target' or -1 on error (inc.
+ * 'targsize' too small).
+ */
int
-uuencode(unsigned char *bufin, unsigned int nbytes, char *bufcoded)
+uuencode(const u_char *src, u_int srclength,
+ char *target, size_t targsize)
{
- /* ENC is the basic 1 character encoding function to make a char printing */
-#define ENC(c) six2pr[c]
-
- register char *outptr = bufcoded;
- unsigned int i;
-
- for (i = 0; i < nbytes; i += 3) {
- *(outptr++) = ENC(*bufin >> 2); /* c1 */
- *(outptr++) = ENC(((*bufin << 4) & 060) | ((bufin[1] >> 4) & 017)); /* c2 */
- *(outptr++) = ENC(((bufin[1] << 2) & 074) | ((bufin[2] >> 6) & 03)); /* c3 */
- *(outptr++) = ENC(bufin[2] & 077); /* c4 */
- bufin += 3;
- }
- if (i == nbytes + 1) {
- outptr[-1] = '=';
- } else if (i == nbytes + 2) {
- outptr[-1] = '=';
- outptr[-2] = '=';
- } else if (i == nbytes) {
- *(outptr++) = '=';
- }
- *outptr = '\0';
- return (outptr - bufcoded);
+ return __b64_ntop(src, srclength, target, targsize);
}
+/*
+ * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes.
+ * Will skip leading and trailing whitespace. Returns the number of bytes
+ * stored in 'target' or -1 on error (inc. targsize too small).
+ */
int
-uudecode(const char *bufcoded, unsigned char *bufplain, int outbufsize)
+uudecode(const char *src, u_char *target, size_t targsize)
{
- /* single character decode */
-#define DEC(c) pr2six[(unsigned char)c]
-#define MAXVAL 63
+ int len;
+ char *encoded, *p;
- static int first = 1;
- int nbytesdecoded, j;
- const char *bufin = bufcoded;
- register unsigned char *bufout = bufplain;
- register int nprbytes;
-
- /* If this is the first call, initialize the mapping table. */
- if (first) {
- first = 0;
- for (j = 0; j < 256; j++)
- pr2six[j] = MAXVAL + 1;
- for (j = 0; j < 64; j++)
- pr2six[(unsigned char) six2pr[j]] = (unsigned char) j;
- }
- /* Strip leading whitespace. */
- while (*bufcoded == ' ' || *bufcoded == '\t')
- bufcoded++;
-
- /*
- * Figure out how many characters are in the input buffer. If this
- * would decode into more bytes than would fit into the output
- * buffer, adjust the number of input bytes downwards.
- */
- bufin = bufcoded;
- while (DEC(*(bufin++)) <= MAXVAL)
+ /* copy the 'readonly' source */
+ encoded = xstrdup(src);
+ /* skip whitespace and data */
+ for (p = encoded; *p == ' ' || *p == '\t'; p++)
;
- nprbytes = bufin - bufcoded - 1;
- nbytesdecoded = ((nprbytes + 3) / 4) * 3;
- if (nbytesdecoded > outbufsize)
- nprbytes = (outbufsize * 4) / 3;
-
- bufin = bufcoded;
-
- while (nprbytes > 0) {
- *(bufout++) = (unsigned char) (DEC(*bufin) << 2 | DEC(bufin[1]) >> 4);
- *(bufout++) = (unsigned char) (DEC(bufin[1]) << 4 | DEC(bufin[2]) >> 2);
- *(bufout++) = (unsigned char) (DEC(bufin[2]) << 6 | DEC(bufin[3]));
- bufin += 4;
- nprbytes -= 4;
- }
- if (nprbytes & 03) {
- if (DEC(bufin[-2]) > MAXVAL)
- nbytesdecoded -= 2;
- else
- nbytesdecoded -= 1;
- }
- return (nbytesdecoded);
+ for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
+ ;
+ /* and remove trailing whitespace because __b64_pton needs this */
+ *p = '\0';
+ len = __b64_pton(encoded, target, targsize);
+ xfree(encoded);
+ return len;
}
void
-dump_base64(FILE *fp, unsigned char *data, int len)
+dump_base64(FILE *fp, u_char *data, u_int len)
{
- unsigned char *buf = xmalloc(2*len);
+ char *buf;
int i, n;
- n = uuencode(data, len, buf);
+
+ if (len > 65536) {
+ fprintf(fp, "dump_base64: len > 65536\n");
+ return;
+ }
+ buf = xmalloc(2*len);
+ n = uuencode(data, len, buf, 2*len);
for (i = 0; i < n; i++) {
fprintf(fp, "%c", buf[i]);
if (i % 70 == 69)
andersk / openssh.git / blobdiff