1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* $OpenBSD: sshbuf-misc.c,v 1.6 2016/05/02 08:49:03 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 <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <stdlib.h>
#include <stdint.h>
#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;
}
char *
sshbuf_dup_string(struct sshbuf *buf)
{
const u_char *p = NULL, *s = sshbuf_ptr(buf);
size_t l = sshbuf_len(buf);
char *r;
if (s == NULL || l > SIZE_MAX)
return NULL;
/* accept a nul only as the last character in the buffer */
if (l > 0 && (p = memchr(s, '\0', l)) != NULL) {
if (p != s + l - 1)
return NULL;
l--; /* the nul is put back below */
}
if ((r = malloc(l + 1)) == NULL)
return NULL;
if (l > 0)
memcpy(r, s, l);
r[l] = '\0';
return r;
}
|
