* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#define NETDISSECT_REWORKED
+/* \summary: IPSEC Encapsulating Security Payload (ESP) printer */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
#include <string.h>
#include <stdlib.h>
#endif
#endif
+#include "netdissect.h"
+#include "strtoaddr.h"
+#include "extract.h"
+
+#include "ascii_strcasecmp.h"
+
#include "ip.h"
-#ifdef INET6
#include "ip6.h"
-#endif
-
-#include "interface.h"
-#include "extract.h"
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
*/
struct newesp {
- u_int32_t esp_spi; /* ESP */
- u_int32_t esp_seq; /* Sequence number */
+ uint32_t esp_spi; /* ESP */
+ uint32_t esp_seq; /* Sequence number */
/*variable size*/ /* (IV and) Payload data */
/*variable size*/ /* padding */
/*8bit*/ /* pad size */
#ifdef HAVE_LIBCRYPTO
union inaddr_u {
struct in_addr in4;
-#ifdef INET6
struct in6_addr in6;
-#endif
};
struct sa_list {
struct sa_list *next;
u_int daddr_version;
union inaddr_u daddr;
- u_int32_t spi; /* if == 0, then IKEv2 */
+ uint32_t spi; /* if == 0, then IKEv2 */
int initiator;
u_char spii[8]; /* for IKEv2 */
u_char spir[8];
int secretlen;
};
+#ifndef HAVE_EVP_CIPHER_CTX_NEW
+/*
+ * Allocate an EVP_CIPHER_CTX.
+ * Used if we have an older version of OpenSSL that doesn't provide
+ * routines to allocate and free them.
+ */
+static EVP_CIPHER_CTX *
+EVP_CIPHER_CTX_new(void)
+{
+ EVP_CIPHER_CTX *ctx;
+
+ ctx = malloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return (NULL);
+ memset(ctx, 0, sizeof(*ctx));
+ return (ctx);
+}
+
+static void
+EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+{
+ EVP_CIPHER_CTX_cleanup(ctx);
+ free(ctx);
+}
+#endif
+
/*
* this will adjust ndo_packetp and ndo_snapend to new buffer!
*/
int esp_print_decrypt_buffer_by_ikev2(netdissect_options *ndo,
int initiator,
u_char spii[8], u_char spir[8],
- u_char *buf, u_char *end)
+ const u_char *buf, const u_char *end)
{
struct sa_list *sa;
- u_char *iv;
+ const u_char *iv;
int len;
- EVP_CIPHER_CTX ctx;
+ EVP_CIPHER_CTX *ctx;
/* initiator arg is any non-zero value */
if(initiator) initiator=1;
if(end <= buf) return 0;
- memset(&ctx, 0, sizeof(ctx));
- if (EVP_CipherInit(&ctx, sa->evp, sa->secret, NULL, 0) < 0)
+ ctx = EVP_CIPHER_CTX_new();
+ if (ctx == NULL)
+ return 0;
+ if (EVP_CipherInit(ctx, sa->evp, sa->secret, NULL, 0) < 0)
(*ndo->ndo_warning)(ndo, "espkey init failed");
- EVP_CipherInit(&ctx, NULL, NULL, iv, 0);
- EVP_Cipher(&ctx, buf, buf, len);
- EVP_CIPHER_CTX_cleanup(&ctx);
+ EVP_CipherInit(ctx, NULL, NULL, iv, 0);
+ EVP_Cipher(ctx, buf, buf, len);
+ EVP_CIPHER_CTX_free(ctx);
ndo->ndo_packetp = buf;
ndo->ndo_snapend = end;
}
*colon = '\0';
- if(strcasecmp(colon,"sha1") == 0 ||
- strcasecmp(colon,"md5") == 0) {
+ if(ascii_strcasecmp(colon,"sha1") == 0 ||
+ ascii_strcasecmp(colon,"md5") == 0) {
sa->authlen = 12;
}
return 1;
} else
decode = line;
- if (spikey && strcasecmp(spikey, "file") == 0) {
+ if (spikey && ascii_strcasecmp(spikey, "file") == 0) {
/* open file and read it */
FILE *secretfile;
char fileline[1024];
- int lineno=0;
+ int subfile_lineno=0;
char *nl;
char *filename = line;
secretfile = fopen(filename, FOPEN_READ_TXT);
if (secretfile == NULL) {
- perror(filename);
- exit(3);
+ (*ndo->ndo_error)(ndo, "print_esp: can't open %s: %s\n",
+ filename, strerror(errno));
+ return;
}
while (fgets(fileline, sizeof(fileline)-1, secretfile) != NULL) {
- lineno++;
+ subfile_lineno++;
/* remove newline from the line */
nl = strchr(fileline, '\n');
if (nl)
if (fileline[0] == '#') continue;
if (fileline[0] == '\0') continue;
- esp_print_decode_onesecret(ndo, fileline, filename, lineno);
+ esp_print_decode_onesecret(ndo, fileline, filename, subfile_lineno);
}
fclose(secretfile);
return;
}
- if (spikey && strcasecmp(spikey, "ikev2") == 0) {
+ if (spikey && ascii_strcasecmp(spikey, "ikev2") == 0) {
esp_print_decode_ikeline(ndo, line, file, lineno);
return;
}
if (spikey) {
char *spistr, *foo;
- u_int32_t spino;
+ uint32_t spino;
spistr = strsep(&spikey, "@");
sa1.spi = spino;
-#ifdef INET6
- if (inet_pton(AF_INET6, spikey, &sa1.daddr.in6) == 1) {
+ if (strtoaddr6(spikey, &sa1.daddr.in6) == 1) {
sa1.daddr_version = 6;
- } else
-#endif
- 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;
- }
+ } else if (strtoaddr(spikey, &sa1.daddr.in4) == 1) {
+ sa1.daddr_version = 4;
+ } else {
+ (*ndo->ndo_warning)(ndo, "print_esp: can not decode IP# %s\n", spikey);
+ return;
+ }
}
if (decode) {
USES_APPLE_DEPRECATED_API
static void esp_init(netdissect_options *ndo _U_)
{
-
+ /*
+ * 0.9.6 doesn't appear to define OPENSSL_API_COMPAT, so
+ * we check whether it's undefined or it's less than the
+ * value for 1.1.0.
+ */
+#if !defined(OPENSSL_API_COMPAT) || OPENSSL_API_COMPAT < 0x10100000L
OpenSSL_add_all_algorithms();
+#endif
EVP_add_cipher_alias(SN_des_ede3_cbc, "3des");
}
USES_APPLE_RST
register const struct newesp *esp;
register const u_char *ep;
#ifdef HAVE_LIBCRYPTO
- struct ip *ip;
+ const struct ip *ip;
struct sa_list *sa = NULL;
-#ifdef INET6
- struct ip6_hdr *ip6 = NULL;
-#endif
+ const struct ip6_hdr *ip6 = NULL;
int advance;
int len;
u_char *secret;
int ivlen = 0;
- u_char *ivoff;
- u_char *p;
- EVP_CIPHER_CTX ctx;
+ const u_char *ivoff;
+ const u_char *p;
+ EVP_CIPHER_CTX *ctx;
#endif
- esp = (struct newesp *)bp;
+ esp = (const struct newesp *)bp;
#ifdef HAVE_LIBCRYPTO
secret = NULL;
/* 'ep' points to the end of available data. */
ep = ndo->ndo_snapend;
- if ((u_char *)(esp + 1) >= ep) {
+ if ((const u_char *)(esp + 1) >= ep) {
ND_PRINT((ndo, "[|ESP]"));
goto fail;
}
if (ndo->ndo_sa_list_head == NULL)
goto fail;
- ip = (struct ip *)bp2;
+ ip = (const struct ip *)bp2;
switch (IP_V(ip)) {
-#ifdef INET6
case 6:
- ip6 = (struct ip6_hdr *)bp2;
+ ip6 = (const struct ip6_hdr *)bp2;
/* we do not attempt to decrypt jumbograms */
if (!EXTRACT_16BITS(&ip6->ip6_plen))
goto fail;
}
}
break;
-#endif /*INET6*/
case 4:
/* nexthdr & padding are in the last fragment */
if (EXTRACT_16BITS(&ip->ip_off) & IP_MF)
ep = bp2 + len;
}
- ivoff = (u_char *)(esp + 1) + 0;
+ ivoff = (const u_char *)(esp + 1) + 0;
ivlen = sa->ivlen;
secret = sa->secret;
ep = ep - sa->authlen;
if (sa->evp) {
- memset(&ctx, 0, sizeof(ctx));
- if (EVP_CipherInit(&ctx, sa->evp, secret, NULL, 0) < 0)
- (*ndo->ndo_warning)(ndo, "espkey init failed");
-
- p = ivoff;
- EVP_CipherInit(&ctx, NULL, NULL, p, 0);
- EVP_Cipher(&ctx, p + ivlen, p + ivlen, ep - (p + ivlen));
- EVP_CIPHER_CTX_cleanup(&ctx);
- advance = ivoff - (u_char *)esp + ivlen;
+ ctx = EVP_CIPHER_CTX_new();
+ if (ctx != NULL) {
+ if (EVP_CipherInit(ctx, sa->evp, secret, NULL, 0) < 0)
+ (*ndo->ndo_warning)(ndo, "espkey init failed");
+
+ p = ivoff;
+ EVP_CipherInit(ctx, NULL, NULL, p, 0);
+ EVP_Cipher(ctx, p + ivlen, p + ivlen, ep - (p + ivlen));
+ EVP_CIPHER_CTX_free(ctx);
+ advance = ivoff - (const u_char *)esp + ivlen;
+ } else
+ advance = sizeof(struct newesp);
} else
advance = sizeof(struct newesp);
projects / tcpdump / blobdiff