1 /* 2 * Copyright (c) 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * Initial contribution from John Hawkinson (jhawk@mit.edu). 22 */ 23 24 #ifndef lint 25 static const char rcsid[] = 26 "@(#) $Header: print-krb.c,v 1.9 97/04/26 14:01:45 leres Exp $"; 27 #endif 28 29 #include <sys/param.h> 30 #include <sys/time.h> 31 #include <sys/socket.h> 32 33 #include <netinet/in.h> 34 #include <netinet/in_systm.h> 35 #include <netinet/ip.h> 36 #include <netinet/ip_var.h> 37 #include <netinet/udp.h> 38 #include <netinet/udp_var.h> 39 40 #include <ctype.h> 41 #include <errno.h> 42 #include <stdio.h> 43 44 #include "interface.h" 45 #include "addrtoname.h" 46 47 const u_char *c_print(register const u_char *, register const u_char *); 48 const u_char *krb4_print_hdr(const u_char *); 49 void krb4_print(const u_char *); 50 void krb_print(const u_char *, u_int); 51 52 53 #define AUTH_MSG_KDC_REQUEST 1<<1 54 #define AUTH_MSG_KDC_REPLY 2<<1 55 #define AUTH_MSG_APPL_REQUEST 3<<1 56 #define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1 57 #define AUTH_MSG_ERR_REPLY 5<<1 58 #define AUTH_MSG_PRIVATE 6<<1 59 #define AUTH_MSG_SAFE 7<<1 60 #define AUTH_MSG_APPL_ERR 8<<1 61 #define AUTH_MSG_DIE 63<<1 62 63 #define KERB_ERR_OK 0 64 #define KERB_ERR_NAME_EXP 1 65 #define KERB_ERR_SERVICE_EXP 2 66 #define KERB_ERR_AUTH_EXP 3 67 #define KERB_ERR_PKT_VER 4 68 #define KERB_ERR_NAME_MAST_KEY_VER 5 69 #define KERB_ERR_SERV_MAST_KEY_VER 6 70 #define KERB_ERR_BYTE_ORDER 7 71 #define KERB_ERR_PRINCIPAL_UNKNOWN 8 72 #define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9 73 #define KERB_ERR_NULL_KEY 10 74 75 struct krb { 76 u_char pvno; /* Protocol Version */ 77 u_char type; /* Type+B */ 78 }; 79 80 static char tstr[] = " [|kerberos]"; 81 82 static struct tok type2str[] = { 83 { AUTH_MSG_KDC_REQUEST, "KDC_REQUEST" }, 84 { AUTH_MSG_KDC_REPLY, "KDC_REPLY" }, 85 { AUTH_MSG_APPL_REQUEST, "APPL_REQUEST" }, 86 { AUTH_MSG_APPL_REQUEST_MUTUAL, "APPL_REQUEST_MUTUAL" }, 87 { AUTH_MSG_ERR_REPLY, "ERR_REPLY" }, 88 { AUTH_MSG_PRIVATE, "PRIVATE" }, 89 { AUTH_MSG_SAFE, "SAFE" }, 90 { AUTH_MSG_APPL_ERR, "APPL_ERR" }, 91 { AUTH_MSG_DIE, "DIE" }, 92 { 0, NULL } 93 }; 94 95 static struct tok kerr2str[] = { 96 { KERB_ERR_OK, "OK" }, 97 { KERB_ERR_NAME_EXP, "NAME_EXP" }, 98 { KERB_ERR_SERVICE_EXP, "SERVICE_EXP" }, 99 { KERB_ERR_AUTH_EXP, "AUTH_EXP" }, 100 { KERB_ERR_PKT_VER, "PKT_VER" }, 101 { KERB_ERR_NAME_MAST_KEY_VER, "NAME_MAST_KEY_VER" }, 102 { KERB_ERR_SERV_MAST_KEY_VER, "SERV_MAST_KEY_VER" }, 103 { KERB_ERR_BYTE_ORDER, "BYTE_ORDER" }, 104 { KERB_ERR_PRINCIPAL_UNKNOWN, "PRINCIPAL_UNKNOWN" }, 105 { KERB_ERR_PRINCIPAL_NOT_UNIQUE,"PRINCIPAL_NOT_UNIQUE" }, 106 { KERB_ERR_NULL_KEY, "NULL_KEY"}, 107 { 0, NULL} 108 }; 109 110 111 /* little endian (unaligned) to host byte order */ 112 /* XXX need to look at this... */ 113 #define vtohlp(x) ((( ((char *)(x))[0] ) ) | \ 114 (( ((char *)(x))[1] ) << 8) | \ 115 (( ((char *)(x))[2] ) << 16) | \ 116 (( ((char *)(x))[3] ) << 24)) 117 #define vtohsp(x) ((( ((char *)(x))[0] ) ) | \ 118 (( ((char *)(x))[1] ) << 8)) 119 /* network (big endian) (unaligned) to host byte order */ 120 #define ntohlp(x) ((( ((char *)(x))[3] ) ) | \ 121 (( ((char *)(x))[2] ) << 8) | \ 122 (( ((char *)(x))[1] ) << 16) | \ 123 (( ((char *)(x))[0] ) << 24)) 124 #define ntohsp(x) ((( ((char *)(x))[1] ) ) | \ 125 (( ((char *)(x))[0] ) << 8)) 126 127 128 129 const u_char * 130 c_print(register const u_char *s, register const u_char *ep) 131 { 132 register u_char c; 133 register int flag; 134 135 flag = 1; 136 while (s < ep) { 137 c = *s++; 138 if (c == '\0') { 139 flag = 0; 140 break; 141 } 142 if (!isascii(c)) { 143 c = toascii(c); 144 putchar('M'); 145 putchar('-'); 146 } 147 if (!isprint(c)) { 148 c ^= 0x40; /* DEL to ?, others to alpha */ 149 putchar('^'); 150 } 151 putchar(c); 152 } 153 if (flag) 154 return NULL; 155 return (s); 156 } 157 158 const u_char * 159 krb4_print_hdr(const u_char *cp) 160 { 161 cp += 2; 162 163 #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc 164 165 PRINT; 166 putchar('.'); 167 PRINT; 168 putchar('@'); 169 PRINT; 170 return (cp); 171 172 trunc: 173 fputs(tstr, stdout); 174 return (NULL); 175 176 #undef PRINT 177 } 178 179 void 180 krb4_print(const u_char *cp) 181 { 182 register const struct krb *kp; 183 u_char type; 184 u_short len; 185 186 #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc 187 /* True if struct krb is little endian */ 188 #define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0) 189 #define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? vtohsp(cp) : ntohsp(cp)) 190 191 kp = (struct krb *)cp; 192 193 if ((&kp->type) >= snapend) { 194 fputs(tstr, stdout); 195 return; 196 } 197 198 type = kp->type & (0xFF << 1); 199 200 printf(" %s %s: ", 201 IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type)); 202 203 switch (type) { 204 205 case AUTH_MSG_KDC_REQUEST: 206 if ((cp = krb4_print_hdr(cp)) == NULL) 207 return; 208 cp += 4; /* ctime */ 209 TCHECK(*cp); 210 printf(" %dmin ", *cp++ * 5); 211 PRINT; 212 putchar('.'); 213 PRINT; 214 break; 215 216 case AUTH_MSG_APPL_REQUEST: 217 cp += 2; 218 TCHECK(*cp); 219 printf("v%d ", *cp++); 220 PRINT; 221 TCHECK(*cp); 222 printf(" (%d)", *cp++); 223 TCHECK(*cp); 224 printf(" (%d)", *cp); 225 break; 226 227 case AUTH_MSG_KDC_REPLY: 228 if ((cp = krb4_print_hdr(cp)) == NULL) 229 return; 230 cp += 10; /* timestamp + n + exp + kvno */ 231 TCHECK2(*cp, sizeof(short)); 232 len = KTOHSP(kp, cp); 233 printf(" (%d)", len); 234 break; 235 236 case AUTH_MSG_ERR_REPLY: 237 if ((cp = krb4_print_hdr(cp)) == NULL) 238 return; 239 cp += 4; /* timestamp */ 240 TCHECK2(*cp, sizeof(short)); 241 printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp))); 242 cp += 4; 243 PRINT; 244 break; 245 246 default: 247 fputs("(unknown)", stdout); 248 break; 249 } 250 251 return; 252 trunc: 253 fputs(tstr, stdout); 254 } 255 256 void 257 krb_print(const u_char *dat, u_int length) 258 { 259 register const struct krb *kp; 260 261 kp = (struct krb *)dat; 262 263 if (dat >= snapend) { 264 fputs(tstr, stdout); 265 return; 266 } 267 268 switch (kp->pvno) { 269 270 case 1: 271 case 2: 272 case 3: 273 printf(" v%d", kp->pvno); 274 break; 275 276 case 4: 277 printf(" v%d", kp->pvno); 278 krb4_print((const u_char *)kp); 279 break; 280 281 case 106: 282 case 107: 283 fputs(" v5", stdout); 284 /* Decode ASN.1 here "someday" */ 285 break; 286 } 287 return; 288 } 289