add boundary, infinite loop checks

[tcpdump] / print-esp.c

diff --git a/print-esp.c b/print-esp.c
index 636ff8eda2fa23a0e62138c2eb49e2cefb86b9a1..260fe8710e898bffb805d7fe2a145bb4178efd82 100644 (file)
--- a/print-esp.c
+++ b/print-esp.c
@@ -22,8 +22,8 @@
  */
 
 #ifndef lint
  */
 
 #ifndef lint

-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-esp.c,v 1.29 2002-09-05 00:00:12 guy Exp $ (LBL)";
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-esp.c,v 1.56 2005-04-21 06:44:40 guy Exp $ (LBL)";

 #endif
 
 #ifdef HAVE_CONFIG_H
 #endif
 
 #ifdef HAVE_CONFIG_H


@@ -37,13 +37,8 @@ static const char rcsid[] =
 #include <stdlib.h>
 
 #ifdef HAVE_LIBCRYPTO
 #include <stdlib.h>
 
 #ifdef HAVE_LIBCRYPTO

-#include <openssl/des.h>
-#include <openssl/blowfish.h>
-#ifdef HAVE_OPENSSL_RC5_H
-#include <openssl/rc5.h>
-#endif
-#ifdef HAVE_OPENSSL_CAST_H
-#include <openssl/cast.h>
+#ifdef HAVE_OPENSSL_EVP_H
+#include <openssl/evp.h>

 #endif
 #endif
 
 #endif
 #endif
 


@@ -55,153 +50,329 @@ static const char rcsid[] =
 #include "ip6.h"
 #endif
 
 #include "ip6.h"
 #endif
 

-#define AVOID_CHURN 1
-#include "interface.h"
+#include "netdissect.h"

 #include "addrtoname.h"
 #include "addrtoname.h"

+#include "extract.h"

 
 

-static struct esp_algorithm *espsecret_xform=NULL;  /* cache of decoded alg. */
-static char                 *espsecret_key=NULL;
+#ifndef HAVE_SOCKADDR_STORAGE
+#ifdef INET6
+struct sockaddr_storage {
+       union {
+               struct sockaddr_in sin;
+               struct sockaddr_in6 sin6;
+       } un;
+};
+#else
+#define sockaddr_storage sockaddr
+#endif
+#endif /* HAVE_SOCKADDR_STORAGE */

 
 

+#ifdef HAVE_LIBCRYPTO
+struct sa_list {
+       struct sa_list  *next;
+       struct sockaddr_storage daddr;
+       u_int32_t       spi;
+       const EVP_CIPHER *evp;
+       int             ivlen;
+       int             authlen;
+       u_char          secret[256];  /* is that big enough for all secrets? */
+       int             secretlen;
+};

 
 

-enum cipher { NONE,
-             DESCBC,
-             BLOWFISH,
-             RC5,
-             CAST128,
-             DES3CBC};
+static void esp_print_addsa(netdissect_options *ndo,
+                           struct sa_list *sa, int sa_def)
+{
+       /* copy the "sa" */

 
 

+       struct sa_list *nsa;

 
 

+       nsa = (struct sa_list *)malloc(sizeof(struct sa_list));
+       if (nsa == NULL)
+               (*ndo->ndo_error)(ndo, "ran out of memory to allocate sa structure");

 
 

-struct esp_algorithm {
-       const char   *name;
-       enum  cipher algo;
-       int          ivlen;
-       int          authlen;
-       int          replaysize;
-};
+       *nsa = *sa;

 
 

-struct esp_algorithm esp_xforms[]={
-       {"none",                  NONE,    0,  0, 0},
-       {"des-cbc",               DESCBC,  8,  0, 0},
-       {"des-cbc-hmac96",        DESCBC,  8, 12, 4},
-       {"blowfish-cbc",          BLOWFISH,8,  0, 0},
-       {"blowfish-cbc-hmac96",   BLOWFISH,8, 12, 4},
-       {"rc5-cbc",               RC5,     8,  0, 0},
-       {"rc5-cbc-hmac96",        RC5,     8, 12, 4},
-       {"cast128-cbc",           CAST128, 8,  0, 0},
-       {"cast128-cbc-hmac96",    CAST128, 8, 12, 4},
-       {"3des-cbc-hmac96",       DES3CBC, 8, 12, 4},
-       {NULL,                    NONE,    0,  0, 0}
-};
+       if (sa_def)
+               ndo->ndo_sa_default = nsa;
+
+       nsa->next = ndo->ndo_sa_list_head;
+       ndo->ndo_sa_list_head = nsa;
+}

 
 

-static int hexdigit(char hex)
+
+static u_int hexdigit(netdissect_options *ndo, char hex)

 {
 {

-       if(hex >= '0' && hex <= '9') {
+       if (hex >= '0' && hex <= '9')

                return (hex - '0');
                return (hex - '0');

-       } else if(hex >= 'A' && hex <= 'F') {
+       else if (hex >= 'A' && hex <= 'F')

                return (hex - 'A' + 10);
                return (hex - 'A' + 10);

-       } else if(hex >= 'a' && hex <= 'f') {
+       else if (hex >= 'a' && hex <= 'f')

                return (hex - 'a' + 10);
                return (hex - 'a' + 10);

-       } else {
-               printf("invalid hex digit %c in espsecret\n", hex);
+       else {
+               (*ndo->ndo_error)(ndo, "invalid hex digit %c in espsecret\n", hex);

                return 0;
        }
 }
 
                return 0;
        }
 }
 

-static int hex2byte(char *hexstring)
+static u_int hex2byte(netdissect_options *ndo, char *hexstring)

 {
 {

-       int byte;
+       u_int byte;

 
 

-       byte = (hexdigit(hexstring[0]) << 4) +
-               hexdigit(hexstring[1]);
+       byte = (hexdigit(ndo, hexstring[0]) << 4) + hexdigit(ndo, hexstring[1]);

        return byte;
 }
 
        return byte;
 }
 

-
-static void esp_print_decodesecret(void)
+/*
+ * decode the form:    SPINUM@IP <tab> ALGONAME:0xsecret
+ *
+ * special form: file /name
+ * causes us to go read from this file instead.
+ *
+ */
+static void esp_print_decode_onesecret(netdissect_options *ndo, char *line)

 {
 {

-       char *colon;
-       int   len, i;
-       struct esp_algorithm *xf;
-       struct esp_algorithm *null_xf =
-               &esp_xforms[sizeof(esp_xforms)/sizeof(esp_xforms[0]) - 1];
-
-       if(espsecret == NULL) {
-               /* set to NULL transform */
-               espsecret_xform = null_xf;
-               return;
-       }
+       struct sa_list sa1;
+       int sa_def;
+
+       char *spikey;
+       char *decode;
+
+       spikey = strsep(&line, " \t");
+       sa_def = 0;
+       memset(&sa1, 0, sizeof(struct sa_list));
+
+       /* if there is only one token, then it is an algo:key token */
+       if (line == NULL) {
+               decode = spikey;
+               spikey = NULL;
+               /* memset(&sa1.daddr, 0, sizeof(sa1.daddr)); */
+               /* sa1.spi = 0; */
+               sa_def    = 1;
+       } else
+               decode = line;
+
+       if (spikey && strcasecmp(spikey, "file") == 0) {
+               /* open file and read it */
+               FILE *secretfile;
+               char  fileline[1024];
+               char  *nl;
+
+               secretfile = fopen(line, FOPEN_READ_TXT);
+               if (secretfile == NULL) {
+                       perror(line);
+                       exit(3);
+               }

 
 

-       if(espsecret_key != NULL) {
-               return;
-       }
+               while (fgets(fileline, sizeof(fileline)-1, secretfile) != NULL) {
+                       /* remove newline from the line */
+                       nl = strchr(fileline, '\n');
+                       if (nl)
+                               *nl = '\0';
+                       if (fileline[0] == '#') continue;
+                       if (fileline[0] == '\0') continue;
+
+                       esp_print_decode_onesecret(ndo, fileline);
+               }
+               fclose(secretfile);

 
 

-       colon = strchr(espsecret, ':');
-       if(colon == NULL) {
-               printf("failed to decode espsecret: %s\n",
-                      espsecret);
-               /* set to NULL transform */
-               espsecret_xform = null_xf;

                return;
        }
 
                return;
        }
 

-       len = colon - espsecret;
-       xf = esp_xforms;
-       while(xf->name && strncasecmp(espsecret, xf->name, len)!=0) {
-               xf++;
-       }
-       if(xf->name == NULL) {
-               printf("failed to find cipher algo %s\n",
-                      espsecret);
-               /* set to NULL transform */
-               espsecret_xform = null_xf;
-               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;
+               } 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;
+               } else {
+                       (*ndo->ndo_warning)(ndo, "print_esp: can not decode IP# %s\n", spikey);
+                       return;
+               }

        }
        }

-       espsecret_xform = xf;
-
-       colon++;
-       if(colon[0]=='0' && colon[1]=='x') {
-               /* decode some hex! */
-               colon+=2;
-               len = strlen(colon) / 2;
-               espsecret_key = (char *)malloc(len);
-               if(espsecret_key == NULL) {
-                 fprintf(stderr, "%s: ran out of memory (%d) to allocate secret key\n",
-                         program_name, len);
-                 exit(2);
+
+       if (decode) {
+               char *colon, *p;
+               u_char espsecret_key[256];
+               int len;
+               size_t i;
+               const EVP_CIPHER *evp;
+               int authlen = 0;
+
+               /* skip any blank spaces */
+               while (isspace((unsigned char)*decode))
+                       decode++;
+
+               colon = strchr(decode, ':');
+               if (colon == NULL) {
+                       (*ndo->ndo_warning)(ndo, "failed to decode espsecret: %s\n", decode);
+                       return;

                }
                }

-               i = 0;
-               while(colon[0] != '\0' && colon[1]!='\0') {
-                       espsecret_key[i]=hex2byte(colon);
-                       colon+=2;
-                       i++;
+               *colon = '\0';
+
+               len = colon - decode;
+               if (strlen(decode) > strlen("-hmac96") &&
+                   !strcmp(decode + strlen(decode) - strlen("-hmac96"),
+                   "-hmac96")) {
+                       p = strstr(decode, "-hmac96");
+                       *p = '\0';
+                       authlen = 12;
+               }
+               if (strlen(decode) > strlen("-cbc") &&
+                   !strcmp(decode + strlen(decode) - strlen("-cbc"), "-cbc")) {
+                       p = strstr(decode, "-cbc");
+                       *p = '\0';
+               }
+               evp = EVP_get_cipherbyname(decode);
+               if (!evp) {
+                       (*ndo->ndo_warning)(ndo, "failed to find cipher algo %s\n", decode);
+                       sa1.evp = NULL;
+                       sa1.authlen = 0;
+                       sa1.ivlen = 0;
+                       return;
+               }
+
+               sa1.evp = evp;
+               sa1.authlen = authlen;
+               sa1.ivlen = EVP_CIPHER_iv_length(evp);
+
+               colon++;
+               if (colon[0] == '0' && colon[1] == 'x') {
+                       /* decode some hex! */
+                       colon += 2;
+                       len = strlen(colon) / 2;
+
+                       if (len > 256) {
+                               (*ndo->ndo_warning)(ndo, "secret is too big: %d\n", len);
+                               return;
+                       }
+
+                       i = 0;
+                       while (colon[0] != '\0' && colon[1]!='\0') {
+                               espsecret_key[i] = hex2byte(ndo, colon);
+                               colon += 2;
+                               i++;
+                       }
+
+                       memcpy(sa1.secret, espsecret_key, i);
+                       sa1.secretlen = i;
+               } else {
+                       i = strlen(colon);
+
+                       if (i < sizeof(sa1.secret)) {
+                               memcpy(sa1.secret, colon, i);
+                               sa1.secretlen = i;
+                       } else {
+                               memcpy(sa1.secret, colon, sizeof(sa1.secret));
+                               sa1.secretlen = sizeof(sa1.secret);
+                       }
+               }
+       }
+
+       esp_print_addsa(ndo, &sa1, sa_def);
+}
+
+static void esp_print_decodesecret(netdissect_options *ndo)
+{
+       char *line;
+       char *p;
+
+       p = ndo->ndo_espsecret;
+
+       while (ndo->ndo_espsecret && ndo->ndo_espsecret[0] != '\0') {
+               /* pick out the first line or first thing until a comma */
+               if ((line = strsep(&ndo->ndo_espsecret, "\n,")) == NULL) {
+                       line = ndo->ndo_espsecret;
+                       ndo->ndo_espsecret = NULL;

                }
                }

-       } else {
-               espsecret_key = colon;
+
+               esp_print_decode_onesecret(ndo, line);

        }
 }
 
        }
 }
 

+static void esp_init(netdissect_options *ndo _U_)
+{
+
+       OpenSSL_add_all_algorithms();
+       EVP_add_cipher_alias(SN_des_ede3_cbc, "3des");
+}
+#endif
+

 int
 int

-esp_print(register const u_char *bp, register const u_char *bp2,
-         int *nhdr, int *padlen)
+esp_print(netdissect_options *ndo,
+         const u_char *bp, const int length, const u_char *bp2
+#ifndef HAVE_LIBCRYPTO
+       _U_
+#endif
+       ,
+       int *nhdr
+#ifndef HAVE_LIBCRYPTO
+       _U_
+#endif
+       ,
+       int *padlen
+#ifndef HAVE_LIBCRYPTO
+       _U_
+#endif
+       )

 {
        register const struct newesp *esp;
        register const u_char *ep;
 {
        register const struct newesp *esp;
        register const u_char *ep;

-       struct ip *ip = NULL;
+#ifdef HAVE_LIBCRYPTO
+       struct ip *ip;
+       struct sa_list *sa = NULL;
+       int espsecret_keylen;

 #ifdef INET6
        struct ip6_hdr *ip6 = NULL;
 #endif
        int advance;
        int len;
 #ifdef INET6
        struct ip6_hdr *ip6 = NULL;
 #endif
        int advance;
        int len;

-       char *secret;
+       u_char *secret;

        int ivlen = 0;
        u_char *ivoff;
        int ivlen = 0;
        u_char *ivoff;

-#ifdef HAVE_LIBCRYPTO

        u_char *p;
        u_char *p;

+       EVP_CIPHER_CTX ctx;
+       int blocksz;
+       static int initialized = 0;

 #endif
 
        esp = (struct newesp *)bp;
 #endif
 
        esp = (struct newesp *)bp;

+
+#ifdef HAVE_LIBCRYPTO

        secret = NULL;
        secret = NULL;

+       advance = 0;
+
+       if (!initialized) {
+               esp_init(ndo);
+               initialized = 1;
+       }
+#endif

 
 #if 0
        /* keep secret out of a register */
 
 #if 0
        /* keep secret out of a register */


@@ -209,224 +380,111 @@ esp_print(register const u_char *bp, register const u_char *bp2,
 #endif
 
        /* 'ep' points to the end of available data. */
 #endif
 
        /* 'ep' points to the end of available data. */

-       ep = snapend;
+       ep = ndo->ndo_snapend;

 
        if ((u_char *)(esp + 1) >= ep) {
                fputs("[|ESP]", stdout);
                goto fail;
        }
 
        if ((u_char *)(esp + 1) >= ep) {
                fputs("[|ESP]", stdout);
                goto fail;
        }

-       printf("ESP(spi=0x%08x", (u_int32_t)ntohl(esp->esp_spi));
-       printf(",seq=0x%x", (u_int32_t)ntohl(esp->esp_seq));
-       printf(")");
+       (*ndo->ndo_printf)(ndo, "ESP(spi=0x%08x", EXTRACT_32BITS(&esp->esp_spi));
+       (*ndo->ndo_printf)(ndo, ",seq=0x%x)", EXTRACT_32BITS(&esp->esp_seq));
+        (*ndo->ndo_printf)(ndo, ", length %u", length);

 
 

-       /* if we don't have decryption key, we can't decrypt this packet. */
-       if (!espsecret)
-               goto fail;
+#ifndef HAVE_LIBCRYPTO
+       goto fail;
+#else
+       /* initiailize SAs */
+       if (ndo->ndo_sa_list_head == NULL) {
+               if (!ndo->ndo_espsecret)
+                       goto fail;

 
 

-       if(!espsecret_xform) {
-               esp_print_decodesecret();
+               esp_print_decodesecret(ndo);

        }
        }

-       if(espsecret_xform->name == NULL) {
+
+       if (ndo->ndo_sa_list_head == NULL)

                goto fail;
                goto fail;

-       }

 
        ip = (struct ip *)bp2;
        switch (IP_V(ip)) {
 #ifdef INET6
        case 6:
                ip6 = (struct ip6_hdr *)bp2;
 
        ip = (struct ip *)bp2;
        switch (IP_V(ip)) {
 #ifdef INET6
        case 6:
                ip6 = (struct ip6_hdr *)bp2;

-               ip = NULL;

                /* we do not attempt to decrypt jumbograms */
                /* we do not attempt to decrypt jumbograms */

-               if (!ntohs(ip6->ip6_plen))
+               if (!EXTRACT_16BITS(&ip6->ip6_plen))

                        goto fail;
                /* if we can't get nexthdr, we do not need to decrypt it */
                        goto fail;
                /* if we can't get nexthdr, we do not need to decrypt it */

-               len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
+               len = sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen);
+
+               /* 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 == ntohl(esp->esp_spi) &&
+                           sin6->sin6_family == AF_INET6 &&
+                           memcmp(&sin6->sin6_addr, &ip6->ip6_dst,
+                                  sizeof(struct in6_addr)) == 0) {
+                               break;
+                       }
+               }

                break;
 #endif /*INET6*/
        case 4:
                /* nexthdr & padding are in the last fragment */
                break;
 #endif /*INET6*/
        case 4:
                /* nexthdr & padding are in the last fragment */

-               if (ntohs(ip->ip_off) & IP_MF)
+               if (EXTRACT_16BITS(&ip->ip_off) & IP_MF)

                        goto fail;
                        goto fail;

-#ifdef INET6
-               ip6 = NULL;
-#endif
-               len = ntohs(ip->ip_len);
+               len = EXTRACT_16BITS(&ip->ip_len);
+
+               /* 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 == ntohl(esp->esp_spi) &&
+                           sin->sin_family == AF_INET &&
+                           sin->sin_addr.s_addr == ip->ip_dst.s_addr) {
+                               break;
+                       }
+               }

                break;
        default:
                goto fail;
        }
 
                break;
        default:
                goto fail;
        }
 

-       /* if we can't get nexthdr, we do not need to decrypt it */
-       if (ep - bp2 < len)
-               goto fail;
-
-       ivoff = (u_char *)(esp + 1) + espsecret_xform->replaysize;
-       ivlen = espsecret_xform->ivlen;
-       secret = espsecret_key;
-
-       switch (espsecret_xform->algo) {
-       case DESCBC:
-#ifdef HAVE_LIBCRYPTO
-           {
-               u_char iv[8];
-#if OPENSSL_VERSION_NUMBER >= 0x00907000L
-               DES_key_schedule schedule;
-#else
-               des_key_schedule schedule;
-#endif
-
-               switch (ivlen) {
-               case 4:
-                       memcpy(iv, ivoff, 4);
-                       memcpy(&iv[4], ivoff, 4);
-                       p = &iv[4];
-                       *p++ ^= 0xff;
-                       *p++ ^= 0xff;
-                       *p++ ^= 0xff;
-                       *p++ ^= 0xff;
-                       break;
-               case 8:
-                       memcpy(iv, ivoff, 8);
-                       break;
-               default:
-                       goto fail;
-               }
-               p = ivoff + ivlen;
-
-#if OPENSSL_VERSION_NUMBER >= 0x00907000L
-               DES_set_key_unchecked((DES_cblock *)secret, schedule);
-
-               DES_cbc_encrypt((const unsigned char *)p, p,
-                       (long)(ep - p), schedule, (DES_cblock *)iv,
-                       DES_DECRYPT);
-#else
-               des_check_key = 0;
-               des_set_key((void *)secret, schedule);
-
-               des_cbc_encrypt((void *)p, (void *)p,
-                       (long)(ep - p), schedule, (void *)iv,
-                       DES_DECRYPT);
-#endif
-               advance = ivoff - (u_char *)esp + ivlen;
-               break;
-           }
-#else
-               goto fail;
-#endif /*HAVE_LIBCRYPTO*/
-
-       case BLOWFISH:
-#ifdef HAVE_LIBCRYPTO
-           {
-               BF_KEY schedule;
-
-               BF_set_key(&schedule, strlen(secret), secret);
-
-               p = ivoff + ivlen;
-               BF_cbc_encrypt(p, p, (long)(ep - p), &schedule, ivoff,
-                       BF_DECRYPT);
-               advance = ivoff - (u_char *)esp + ivlen;
-               break;
-           }
-#else
+       /* if we didn't find the specific one, then look for
+        * an unspecified one.
+        */
+       if (sa == NULL)
+               sa = ndo->ndo_sa_default;
+       
+       /* if not found fail */
+       if (sa == NULL)

                goto fail;
                goto fail;

-#endif /*HAVE_LIBCRYPTO*/
-
-       case RC5:
-#if defined(HAVE_LIBCRYPTO) && defined(HAVE_RC5_H)
-           {
-               RC5_32_KEY schedule;
-
-               RC5_32_set_key(&schedule, strlen(secret), secret,
-                       RC5_16_ROUNDS);

 
 

-               p = ivoff + ivlen;
-               RC5_32_cbc_encrypt(p, p, (long)(ep - p), &schedule, ivoff,
-                       RC5_DECRYPT);
-               advance = ivoff - (u_char *)esp + ivlen;
-               break;
-           }
-#else
+       /* if we can't get nexthdr, we do not need to decrypt it */
+       if (ep - bp2 < len)

                goto fail;
                goto fail;

-#endif /*HAVE_LIBCRYPTO*/
-
-       case CAST128:
-#if defined(HAVE_LIBCRYPTO) && defined(HAVE_CAST_H) && !defined(HAVE_BUGGY_CAST128)
-           {
-               CAST_KEY schedule;
+       if (ep - bp2 > len) {
+               /* FCS included at end of frame (NetBSD 1.6 or later) */
+               ep = bp2 + len;
+       }

 
 

-               CAST_set_key(&schedule, strlen(secret), secret);
+       ivoff = (u_char *)(esp + 1) + 0;
+       ivlen = sa->ivlen;
+       secret = sa->secret;
+       espsecret_keylen = sa->secretlen;
+       ep = ep - sa->authlen;

 
 

-               p = ivoff + ivlen;
-               CAST_cbc_encrypt(p, p, (long)(ep - p), &schedule, ivoff,
-                       CAST_DECRYPT);
-               advance = ivoff - (u_char *)esp + ivlen;
-               break;
-           }
-#else
-               goto fail;
-#endif /*HAVE_LIBCRYPTO*/
-
-       case DES3CBC:
-#if defined(HAVE_LIBCRYPTO)
-           {
-#if OPENSSL_VERSION_NUMBER >= 0x00907000L
-               DES_key_schedule s1, s2, s3;
-
-               DES_set_odd_parity((DES_cblock *)secret);
-               DES_set_odd_parity((DES_cblock *)(secret + 8));
-               DES_set_odd_parity((DES_cblock *)(secret + 16));
-               if(DES_set_key_checked((DES_cblock *)secret, s1) != 0) {
-                 printf("failed to schedule key 1\n");
-               }
-               if(DES_set_key_checked((DES_cblock *)(secret + 8), s2)!=0) {
-                 printf("failed to schedule key 2\n");
-               }
-               if(DES_set_key_checked((DES_cblock *)(secret + 16), s3)!=0) {
-                 printf("failed to schedule key 3\n");
-               }
+       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 + ivlen;
-               DES_ede3_cbc_encrypt((const unsigned char *)p, p,
-                                    (long)(ep - p),
-                                    &s1, &s2, &s3,
-                                    (DES_cblock *)ivoff, DES_DECRYPT);
-#else
-               des_key_schedule s1, s2, s3;
-
-               des_check_key = 1;
-               des_set_odd_parity((void *)secret);
-               des_set_odd_parity((void *)(secret + 8));
-               des_set_odd_parity((void *)(secret + 16));
-               if(des_set_key((void *)secret, s1) != 0) {
-                 printf("failed to schedule key 1\n");
-               }
-               if(des_set_key((void *)(secret + 8), s2)!=0) {
-                 printf("failed to schedule key 2\n");
-               }
-               if(des_set_key((void *)(secret + 16), s3)!=0) {
-                 printf("failed to schedule key 3\n");
-               }
+               blocksz = EVP_CIPHER_CTX_block_size(&ctx);

 
 

-               p = ivoff + ivlen;
-               des_ede3_cbc_encrypt((void *)p, (void *)p,
-                                    (long)(ep - p),
-                                    s1, s2, s3,
-                                    (void *)ivoff, DES_DECRYPT);
-#endif
+               p = ivoff;
+               EVP_CipherInit(&ctx, NULL, NULL, p, 0);
+               EVP_Cipher(&ctx, p + ivlen, p + ivlen, ep - (p + ivlen));

                advance = ivoff - (u_char *)esp + ivlen;
                advance = ivoff - (u_char *)esp + ivlen;

-               break;
-           }
-#else
-               goto fail;
-#endif /*HAVE_LIBCRYPTO*/
+       } else
+               advance = sizeof(struct newesp);

 
 

-       case NONE:
-       default:
-               advance = sizeof(struct newesp) + espsecret_xform->replaysize;
-               break;
-       }
-
-       ep = ep - espsecret_xform->authlen;

        /* sanity check for pad length */
        if (ep - bp < *(ep - 2))
                goto fail;
        /* sanity check for pad length */
        if (ep - bp < *(ep - 2))
                goto fail;


@@ -437,11 +495,17 @@ esp_print(register const u_char *bp, register const u_char *bp2,
        if (nhdr)
                *nhdr = *(ep - 1);
 
        if (nhdr)
                *nhdr = *(ep - 1);
 

-       printf(": ");
+       (ndo->ndo_printf)(ndo, ": ");

        return advance;
        return advance;

+#endif

 
 fail:
 
 fail:

-       if (nhdr)
-               *nhdr = -1;
-       return 65536;
+       return -1;

 }
 }

+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */