* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-esp.c,v 1.58 2007-12-07 00:03:07 mcr Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
+/* Any code in this file that depends on HAVE_LIBCRYPTO depends on
+ * HAVE_OPENSSL_EVP_H too. Undefining the former when the latter isn't defined
+ * is the simplest way of handling the dependency.
+ */
#ifdef HAVE_LIBCRYPTO
#ifdef HAVE_OPENSSL_EVP_H
#include <openssl/evp.h>
#include <stdio.h>
#include "ip.h"
-#include "esp.h"
#ifdef INET6
#include "ip6.h"
#endif
#include "addrtoname.h"
#include "extract.h"
-#ifndef HAVE_SOCKADDR_STORAGE
-#ifdef INET6
-struct sockaddr_storage {
- union {
- struct sockaddr_in sin;
- struct sockaddr_in6 sin6;
- } un;
+/*
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * All rights reserved.
+ *
+ * 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.
+ * 3. Neither the name of the project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
+ */
+
+/*
+ * RFC1827/2406 Encapsulated Security Payload.
+ */
+
+struct newesp {
+ u_int32_t esp_spi; /* ESP */
+ u_int32_t esp_seq; /* Sequence number */
+ /*variable size*/ /* (IV and) Payload data */
+ /*variable size*/ /* padding */
+ /*8bit*/ /* pad size */
+ /*8bit*/ /* next header */
+ /*8bit*/ /* next header */
+ /*variable size, 32bit bound*/ /* Authentication data */
};
-#else
-#define sockaddr_storage sockaddr
-#endif
-#endif /* HAVE_SOCKADDR_STORAGE */
#ifdef HAVE_LIBCRYPTO
+union inaddr_u {
+ struct in_addr in4;
+#ifdef INET6
+ struct in6_addr in6;
+#endif
+};
struct sa_list {
struct sa_list *next;
- struct sockaddr_storage daddr;
+ u_int daddr_version;
+ union inaddr_u daddr;
u_int32_t spi; /* if == 0, then IKEv2 */
int initiator;
u_char spii[8]; /* for IKEv2 */
/*
* this will adjust ndo_packetp and ndo_snapend to new buffer!
*/
+USES_APPLE_DEPRECATED_API
int esp_print_decrypt_buffer_by_ikev2(netdissect_options *ndo,
int initiator,
u_char spii[8], u_char spir[8],
/* initiator arg is any non-zero value */
if(initiator) initiator=1;
-
+
/* see if we can find the SA, and if so, decode it */
for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
if (sa->spi == 0
ndo->ndo_snapend = end;
return 1;
-
+
}
+USES_APPLE_RST
static void esp_print_addsa(netdissect_options *ndo,
struct sa_list *sa, int sa_def)
int i;
len = strlen(hex) / 2;
-
+
if (len > binbuf_len) {
(*ndo->ndo_warning)(ndo, "secret is too big: %d\n", len);
return 0;
}
-
+
i = 0;
while (hex[0] != '\0' && hex[1]!='\0') {
binbuf[i] = hex2byte(ndo, hex);
* decode the form: SPINUM@IP <tab> ALGONAME:0xsecret
*/
+USES_APPLE_DEPRECATED_API
static int
espprint_decode_encalgo(netdissect_options *ndo,
char *decode, struct sa_list *sa)
{
- int len;
size_t i;
const EVP_CIPHER *evp;
int authlen = 0;
char *colon, *p;
-
+
colon = strchr(decode, ':');
if (colon == NULL) {
(*ndo->ndo_warning)(ndo, "failed to decode espsecret: %s\n", decode);
return 0;
}
*colon = '\0';
-
- len = colon - decode;
+
if (strlen(decode) > strlen("-hmac96") &&
!strcmp(decode + strlen(decode) - strlen("-hmac96"),
"-hmac96")) {
sa->ivlen = 0;
return 0;
}
-
+
sa->evp = evp;
sa->authlen = authlen;
sa->ivlen = EVP_CIPHER_iv_length(evp);
-
+
colon++;
if (colon[0] == '0' && colon[1] == 'x') {
/* decode some hex! */
if(sa->secretlen == 0) return 0;
} else {
i = strlen(colon);
-
+
if (i < sizeof(sa->secret)) {
memcpy(sa->secret, colon, i);
sa->secretlen = i;
return 1;
}
+USES_APPLE_RST
/*
* for the moment, ignore the auth algorith, just hard code the authenticator
return 0;
}
*colon = '\0';
-
+
if(strcasecmp(colon,"sha1") == 0 ||
strcasecmp(colon,"md5") == 0) {
sa->authlen = 12;
int ilen, rlen;
char *authkey;
char *enckey;
-
+
init = strsep(&line, " \t");
icookie = strsep(&line, " \t");
rcookie = strsep(&line, " \t");
authkey = strsep(&line, " \t");
enckey = strsep(&line, " \t");
-
+
/* if any fields are missing */
if(!init || !icookie || !rcookie || !authkey || !enckey) {
(*ndo->ndo_warning)(ndo, "print_esp: failed to find all fields for ikev2 at %s:%u",
file, lineno);
-
+
return;
}
-
+
ilen = strlen(icookie);
rlen = strlen(rcookie);
(*ndo->ndo_warning)(ndo, "init=%s icookie=%s(%u) rcookie=%s(%u)",
init, icookie, ilen, rcookie, rlen);
-
+
return;
}
if(!espprint_decode_encalgo(ndo, enckey, &sa1)) return;
if(!espprint_decode_authalgo(ndo, authkey, &sa1)) return;
-
+
esp_print_addsa(ndo, &sa1, FALSE);
}
if (line == NULL) {
decode = spikey;
spikey = NULL;
+ /* sa1.daddr.version = 0; */
/* memset(&sa1.daddr, 0, sizeof(sa1.daddr)); */
/* sa1.spi = 0; */
sa_def = 1;
if (spikey && strcasecmp(spikey, "ikev2") == 0) {
esp_print_decode_ikeline(ndo, line, file, lineno);
return;
- }
+ }
if (spikey) {
-
+
char *spistr, *foo;
u_int32_t spino;
- struct sockaddr_in *sin;
-#ifdef INET6
- struct sockaddr_in6 *sin6;
-#endif
-
+
spistr = strsep(&spikey, "@");
-
+
spino = strtoul(spistr, &foo, 0);
if (spistr == foo || !spikey) {
(*ndo->ndo_warning)(ndo, "print_esp: failed to decode spi# %s\n", foo);
return;
}
-
+
sa1.spi = spino;
-
- sin = (struct sockaddr_in *)&sa1.daddr;
+
#ifdef INET6
- sin6 = (struct sockaddr_in6 *)&sa1.daddr;
- if (inet_pton(AF_INET6, spikey, &sin6->sin6_addr) == 1) {
-#ifdef HAVE_SOCKADDR_SA_LEN
- sin6->sin6_len = sizeof(struct sockaddr_in6);
-#endif
- sin6->sin6_family = AF_INET6;
+ if (inet_pton(AF_INET6, spikey, &sa1.daddr.in6) == 1) {
+ sa1.daddr_version = 6;
} else
#endif
- if (inet_pton(AF_INET, spikey, &sin->sin_addr) == 1) {
-#ifdef HAVE_SOCKADDR_SA_LEN
- sin->sin_len = sizeof(struct sockaddr_in);
-#endif
- sin->sin_family = AF_INET;
+ if (inet_pton(AF_INET, spikey, &sa1.daddr.in4) == 1) {
+ sa1.daddr_version = 4;
} else {
(*ndo->ndo_warning)(ndo, "print_esp: can not decode IP# %s\n", spikey);
return;
/* skip any blank spaces */
while (isspace((unsigned char)*decode))
decode++;
-
+
if(!espprint_decode_encalgo(ndo, decode, &sa1)) {
return;
}
esp_print_addsa(ndo, &sa1, sa_def);
}
+USES_APPLE_DEPRECATED_API
static void esp_init(netdissect_options *ndo _U_)
{
OpenSSL_add_all_algorithms();
EVP_add_cipher_alias(SN_des_ede3_cbc, "3des");
}
+USES_APPLE_RST
void esp_print_decodesecret(netdissect_options *ndo)
{
#endif
+#ifdef HAVE_LIBCRYPTO
+USES_APPLE_DEPRECATED_API
+#endif
int
esp_print(netdissect_options *ndo,
const u_char *bp, const int length, const u_char *bp2
#ifdef HAVE_LIBCRYPTO
struct ip *ip;
struct sa_list *sa = NULL;
- int espsecret_keylen;
#ifdef INET6
struct ip6_hdr *ip6 = NULL;
#endif
u_char *ivoff;
u_char *p;
EVP_CIPHER_CTX ctx;
- int blocksz;
#endif
esp = (struct newesp *)bp;
/* see if we can find the SA, and if so, decode it */
for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&sa->daddr;
if (sa->spi == EXTRACT_32BITS(&esp->esp_spi) &&
- sin6->sin6_family == AF_INET6 &&
- memcmp(&sin6->sin6_addr, &ip6->ip6_dst,
+ sa->daddr_version == 6 &&
+ UNALIGNED_MEMCMP(&sa->daddr.in6, &ip6->ip6_dst,
sizeof(struct in6_addr)) == 0) {
break;
}
/* see if we can find the SA, and if so, decode it */
for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
- struct sockaddr_in *sin = (struct sockaddr_in *)&sa->daddr;
if (sa->spi == EXTRACT_32BITS(&esp->esp_spi) &&
- sin->sin_family == AF_INET &&
- sin->sin_addr.s_addr == ip->ip_dst.s_addr) {
+ sa->daddr_version == 4 &&
+ UNALIGNED_MEMCMP(&sa->daddr.in4, &ip->ip_dst,
+ sizeof(struct in_addr)) == 0) {
break;
}
}
*/
if (sa == NULL)
sa = ndo->ndo_sa_default;
-
+
/* if not found fail */
if (sa == NULL)
goto fail;
ivoff = (u_char *)(esp + 1) + 0;
ivlen = sa->ivlen;
secret = sa->secret;
- espsecret_keylen = sa->secretlen;
ep = ep - sa->authlen;
if (sa->evp) {
if (EVP_CipherInit(&ctx, sa->evp, secret, NULL, 0) < 0)
(*ndo->ndo_warning)(ndo, "espkey init failed");
- blocksz = EVP_CIPHER_CTX_block_size(&ctx);
-
p = ivoff;
EVP_CipherInit(&ctx, NULL, NULL, p, 0);
EVP_Cipher(&ctx, p + ivlen, p + ivlen, ep - (p + ivlen));
fail:
return -1;
}
+#ifdef HAVE_LIBCRYPTO
+USES_APPLE_RST
+#endif
/*
* Local Variables:
projects / tcpdump / blobdiff