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|
/* $OpenBSD: ipsecadm.c,v 1.12 1997/11/18 00:13:44 provos Exp $ */
/*
* The author of this code is John Ioannidis, ji@tla.org,
* (except when noted otherwise).
*
* This code was written for BSD/OS in Athens, Greece, in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis, kermit@forthnet.gr. Additional code written by
* Niels Provos in Germany.
*
* Copyright (C) 1995, 1996, 1997 by John Ioannidis, Angelos D. Keromytis
* and Niels Provos
*
* Permission to use, copy, and modify this software without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NEITHER AUTHOR MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netns/ns.h>
#include <netiso/iso.h>
#include <netccitt/x25.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include "net/encap.h"
#include "netinet/ip_ipsp.h"
#include "netinet/ip_esp.h"
#define ESP_OLD 0x01
#define ESP_NEW 0x02
#define AH_OLD 0x04
#define AH_NEW 0x08
#define XF_ENC 0x10
#define XF_AUTH 0x20
#define DEL_SPI 0x30
#define GRP_SPI 0x40
#define ENC_IP 0x80
#define CMD_MASK 0xf0
#define isencauth(x) ((x)&~CMD_MASK)
#define iscmd(x,y) (((x) & CMD_MASK) == (y))
typedef struct {
char *name;
int id, flags;
} transform;
int xf_esp_new __P((struct in_addr, struct in_addr, u_int32_t, int, int,
u_char *, u_char *, u_char *, struct in_addr,
struct in_addr, int));
int xf_esp_old __P((struct in_addr, struct in_addr, u_int32_t, int, u_char *,
u_char *, struct in_addr, struct in_addr));
int xf_ah_new __P((struct in_addr, struct in_addr, u_int32_t, int, u_char *,
struct in_addr, struct in_addr));
int xf_ah_old __P((struct in_addr, struct in_addr, u_int32_t, int, u_char *,
struct in_addr, struct in_addr));
int xf_delspi __P((struct in_addr, u_int32_t, int, int));
int xf_grp __P((struct in_addr, u_int32_t, int, struct in_addr, u_int32_t, int));
int xf_ip4 __P((struct in_addr, struct in_addr, u_int32_t,
struct in_addr, struct in_addr));
transform xf[] = {
{"des", ALG_ENC_DES, XF_ENC |ESP_OLD|ESP_NEW},
{"3des", ALG_ENC_3DES, XF_ENC |ESP_OLD|ESP_NEW},
{"blf", ALG_ENC_BLF, XF_ENC | ESP_NEW},
{"cast", ALG_ENC_CAST, XF_ENC | ESP_NEW},
{"md5", ALG_AUTH_MD5, XF_AUTH|AH_OLD|AH_NEW|ESP_NEW},
{"sha1", ALG_AUTH_SHA1,XF_AUTH|AH_OLD|AH_NEW|ESP_NEW},
};
char buf[1024];
int
x2i(char *s)
{
char ss[3];
ss[0] = s[0];
ss[1] = s[1];
ss[2] = 0;
return strtoul(ss, NULL, 16);
}
int
isvalid(char *option, int type, int mode)
{
int i;
for (i = sizeof(xf) / sizeof(transform) - 1; i >= 0; i--)
if (!strcmp(option, xf[i].name))
if ((xf[i].flags & CMD_MASK) == type &&
(xf[i].flags & mode))
return xf[i].id;
else
return 0;
return 0;
}
void
usage()
{
fprintf( stderr, "usage: ipsecadm [command] <modifier...>\n"
"\tCommands: new esp, old esp, new ah, old ah, group, delspi, ip4\n"
"\tPossible modifiers:\n"
"\t\t-enc <alg>\t encryption algorithm\n"
"\t\t-auth <alg>\t authentication algorithm\n"
"\t\t-src <ip>\t source address to be used\n"
"\t\t-tunnel <ip> <ip> tunneling addresses\n"
"\t\t-dst <ip>\t destination address to be used\n"
"\t\t-spi <val>\t SPI to be used\n"
"\t\t-key <val>\t key material to be used\n"
"\t\t-authkey <val>\t key material for auth in new esp\n"
"\t\t-iv <val>\t iv to be used\n"
"\t\t-proto <val>\t security protocol\n"
"\t\t-chain\t\t SPI chain delete\n"
"\t\t-newpadding\t new style padding for new ESP\n"
"\talso: dst2, spi2, proto2\n"
);
}
int
main(argc, argv)
int argc;
char **argv;
{
int i;
int mode = ESP_NEW, new = 1, flag = 0, newpadding = 0;
int auth = 0, enc = 0, ivlen = 0, klen = 0, alen = 0;
int proto = IPPROTO_ESP, proto2 = IPPROTO_AH;
int chain = 0;
u_int32_t spi = 0, spi2 = 0;
struct in_addr src, dst, dst2, osrc, odst;
u_char *ivp = NULL, *keyp = NULL, *authp = NULL;
osrc.s_addr = odst.s_addr = src.s_addr = dst.s_addr = dst2.s_addr = 0;
if (argc < 2) {
usage();
exit(1);
}
for (i=1; i < argc; i++) {
if (!strcmp(argv[i], "new") && !flag) {
flag = 1;
new = 1;
} else if (!strcmp(argv[i], "old") && !flag) {
flag = 1;
new = 0;
} else if (!strcmp(argv[i], "esp") && flag < 2) {
flag = 2;
mode = new ? ESP_NEW : ESP_OLD;
} else if (!strcmp(argv[i], "ah") && flag < 2) {
flag = 2;
mode = new ? AH_NEW : AH_OLD;
} else if (!strcmp(argv[i], "delspi") && flag < 2) {
flag = 2;
mode = DEL_SPI;
} else if (!strcmp(argv[i], "group") && flag < 2) {
flag = 2;
mode = GRP_SPI;
} else if (!strcmp(argv[i], "ip4") && flag < 2) {
flag = 2;
mode = ENC_IP;
} else if (argv[i][0] == '-') {
break;
} else {
fprintf(stderr, "%s: Unknown command: %s", argv[0], argv[i]);
exit(1);
}
}
for (; i < argc; i++) {
if (argv[i][0] != '-') {
fprintf(stderr, "%s: Expected option, got %s\n",
argv[0], argv[i]);
exit(1);
} else if (!strcmp(argv[i]+1, "enc") && enc == 0 && i+1 < argc) {
if ((enc = isvalid(argv[i+1], XF_ENC, mode)) == 0) {
fprintf(stderr, "%s: Invalid encryption algorithm %s\n",
argv[0], argv[i+1]);
exit(1);
}
i++;
} else if (!strcmp(argv[i]+1, "auth") && auth == 0 && i+1 < argc) {
if ((auth = isvalid(argv[i+1], XF_AUTH, mode)) == 0) {
fprintf(stderr, "%s: Invalid auth algorithm %s\n",
argv[0], argv[i+1]);
exit(1);
}
i++;
} else if (!strcmp(argv[i]+1, "key") && keyp == NULL && i+1 < argc) {
keyp = argv[++i];
klen = strlen(keyp);
} else if (!strcmp(argv[i]+1, "authkey") && authp == NULL && i+1 < argc) {
if (!(mode & ESP_NEW)) {
fprintf(stderr, "%s: Invalid option %s for selected mode\n",
argv[0], argv[i]);
exit(1);
}
authp = argv[++i];
alen = strlen(keyp);
} else if (!strcmp(argv[i]+1, "iv") && ivp == NULL && i+1 < argc) {
if (mode & (AH_OLD|AH_NEW)) {
fprintf(stderr, "%s: Invalid option %s with auth\n",
argv[0], argv[i]);
exit(1);
}
ivp = argv[++i];
ivlen = strlen(ivp);
} else if (!strcmp(argv[i]+1, "spi") && spi == 0 && i+1 < argc) {
if ((spi = htonl(strtoul(argv[i+1], NULL, 16))) == 0) {
fprintf(stderr, "%s: Invalid spi %s\n",
argv[0], argv[i+1]);
exit(1);
}
i++;
} else if (!strcmp(argv[i]+1, "spi2") && spi2 == 0 &&
iscmd(mode, GRP_SPI) && i+1 < argc) {
if ((spi2 = htonl(strtoul(argv[i+1], NULL, 16))) == 0) {
fprintf(stderr, "%s: Invalid spi2 %s\n",
argv[0], argv[i+1]);
exit(1);
}
i++;
} else if (!strcmp(argv[i]+1, "src") && i+1 < argc) {
src.s_addr = inet_addr(argv[i+1]);
i++;
} else if (!strcmp(argv[i]+1, "newpadding")) {
newpadding = 1;
} else if (!strcmp(argv[i]+1, "tunnel") && i+2 < argc) {
osrc.s_addr = inet_addr(argv[i+1]);
i++;
odst.s_addr = inet_addr(argv[i+1]);
i++;
} else if (!strcmp(argv[i]+1, "dst") && i+1 < argc) {
dst.s_addr = inet_addr(argv[i+1]);
i++;
} else if (!strcmp(argv[i]+1, "dst2") &&
iscmd(mode, GRP_SPI) && i+1 < argc) {
dst2.s_addr = inet_addr(argv[i+1]);
i++;
} else if (!strcmp(argv[i]+1, "proto") && i+1 < argc) {
proto = atoi(argv[i+1]);
i++;
} else if (!strcmp(argv[i]+1, "proto2") &&
iscmd(mode, GRP_SPI) && i+1 < argc) {
proto2 = atoi(argv[i+1]);
i++;
} else if (!strcmp(argv[i]+1, "chain") && chain == 0 &&
iscmd(mode, DEL_SPI)) {
chain = 1;
} else {
fprintf(stderr, "%s: Unkown option: %s\n", argv[0], argv[i]);
exit(1);
}
}
/* Sanity checks */
if ((mode & (ESP_NEW|ESP_OLD)) && enc == 0) {
fprintf(stderr, "%s: No encryption algorithm specified\n",
argv[0]);
exit(1);
} else if ((mode & (AH_NEW|AH_OLD)) && auth == 0) {
fprintf(stderr, "%s: No authenication algorithm specified\n",
argv[0]);
exit(1);
} else if (isencauth(mode) && keyp == NULL) {
fprintf(stderr, "%s: No key material specified\n", argv[0]);
exit(1);
} else if ((mode & ESP_NEW) && auth & authp == NULL) {
fprintf(stderr, "%s: No auth key material specified\n", argv[0]);
exit(1);
} else if (spi == 0) {
fprintf(stderr, "%s: No SPI specified\n", argv[0]);
exit(1);
} else if (iscmd(mode, GRP_SPI) && spi2 == 0) {
fprintf(stderr, "%s: No SPI2 specified\n", argv[0]);
exit(1);
} else if ((isencauth(mode) || iscmd(mode, ENC_IP)) &&
src.s_addr == 0) {
fprintf(stderr, "%s: No source address specified\n", argv[0]);
exit(1);
} else if ((iscmd(mode, DEL_SPI) || iscmd(mode, GRP_SPI))
&& proto == 0) {
fprintf(stderr, "%s: No security protocol specified\n", argv[0]);
exit(1);
} else if (iscmd(mode, GRP_SPI) && proto2 == 0) {
fprintf(stderr, "%s: No security protocol2 specified\n", argv[0]);
exit(1);
} else if (dst.s_addr == 0) {
fprintf(stderr, "%s: No destination address specified\n",
argv[0]);
exit(1);
} else if (iscmd(mode, ENC_IP) &&
(odst.s_addr == 0 || osrc.s_addr == 0)) {
fprintf(stderr, "%s: No tunnel addresses specified\n",
argv[0]);
exit(1);
} else if (iscmd(mode, GRP_SPI) && dst2.s_addr == 0) {
fprintf(stderr, "%s: No destination address2 specified\n",
argv[0]);
exit(1);
}
if (isencauth(mode)) {
switch(mode) {
case ESP_NEW:
xf_esp_new(src, dst, spi, enc, auth, ivp, keyp, authp,
osrc, odst, newpadding);
break;
case ESP_OLD:
xf_esp_old(src, dst, spi, enc, ivp, keyp, osrc, odst);
break;
case AH_NEW:
xf_ah_new(src, dst, spi, auth, keyp, osrc, odst);
break;
case AH_OLD:
xf_ah_old(src, dst, spi, auth, keyp, osrc, odst);
break;
}
} else {
switch(mode & CMD_MASK) {
case GRP_SPI:
xf_grp(dst, spi, proto, dst2, spi2, proto2);
break;
case DEL_SPI:
xf_delspi(dst, spi, proto, chain);
break;
case ENC_IP:
xf_ip4(src, dst, spi, osrc, odst);
break;
}
}
return 1;
}
|
