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/* $OpenBSD: sshbuf-misc.c,v 1.5 2015/10/05 17:11:21 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <stdlib.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <stdio.h>
#include <limits.h>
#include <string.h>
#include <resolv.h>
#include <ctype.h>
#include "ssherr.h"
#define SSHBUF_INTERNAL
#include "sshbuf.h"
void
sshbuf_dump_data(const void *s, size_t len, FILE *f)
{
size_t i, j;
const u_char *p = (const u_char *)s;
for (i = 0; i < len; i += 16) {
fprintf(f, "%.4zu: ", i);
for (j = i; j < i + 16; j++) {
if (j < len)
fprintf(f, "%02x ", p[j]);
else
fprintf(f, " ");
}
fprintf(f, " ");
for (j = i; j < i + 16; j++) {
if (j < len) {
if (isascii(p[j]) && isprint(p[j]))
fprintf(f, "%c", p[j]);
else
fprintf(f, ".");
}
}
fprintf(f, "\n");
}
}
void
sshbuf_dump(struct sshbuf *buf, FILE *f)
{
fprintf(f, "buffer %p len = %zu\n", buf, sshbuf_len(buf));
sshbuf_dump_data(sshbuf_ptr(buf), sshbuf_len(buf), f);
}
char *
sshbuf_dtob16(struct sshbuf *buf)
{
size_t i, j, len = sshbuf_len(buf);
const u_char *p = sshbuf_ptr(buf);
char *ret;
const char hex[] = "0123456789abcdef";
if (len == 0)
return strdup("");
if (SIZE_MAX / 2 <= len || (ret = malloc(len * 2 + 1)) == NULL)
return NULL;
for (i = j = 0; i < len; i++) {
ret[j++] = hex[(p[i] >> 4) & 0xf];
ret[j++] = hex[p[i] & 0xf];
}
ret[j] = '\0';
return ret;
}
char *
sshbuf_dtob64(struct sshbuf *buf)
{
size_t len = sshbuf_len(buf), plen;
const u_char *p = sshbuf_ptr(buf);
char *ret;
int r;
if (len == 0)
return strdup("");
plen = ((len + 2) / 3) * 4 + 1;
if (SIZE_MAX / 2 <= len || (ret = malloc(plen)) == NULL)
return NULL;
if ((r = b64_ntop(p, len, ret, plen)) == -1) {
explicit_bzero(ret, plen);
free(ret);
return NULL;
}
return ret;
}
int
sshbuf_b64tod(struct sshbuf *buf, const char *b64)
{
size_t plen = strlen(b64);
int nlen, r;
u_char *p;
if (plen == 0)
return 0;
if ((p = malloc(plen)) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((nlen = b64_pton(b64, p, plen)) < 0) {
explicit_bzero(p, plen);
free(p);
return SSH_ERR_INVALID_FORMAT;
}
if ((r = sshbuf_put(buf, p, nlen)) < 0) {
explicit_bzero(p, plen);
free(p);
return r;
}
explicit_bzero(p, plen);
free(p);
return 0;
}
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