1 /* 2 * Copyright (c) 1995, 1996 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 char rcsid[] = 26 "@(#) $Header: print-krb.c,v 1.6 96/07/23 14:17:24 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 (ep == NULL || 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 TCHECK2(cp, 0); 166 PRINT; 167 TCHECK2(cp, 0); 168 putchar('.'); PRINT; 169 TCHECK2(cp, 0); 170 putchar('@'); PRINT; 171 return(cp); 172 173 trunc: 174 fputs(tstr, stdout); 175 return(NULL); 176 177 #undef PRINT 178 } 179 180 void 181 krb4_print(const u_char *cp) 182 { 183 register const struct krb *kp; 184 u_char type; 185 u_short len; 186 187 #define PRINT if ((cp=c_print(cp, snapend))==NULL) goto trunc 188 /* True if struct krb is little endian */ 189 #define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0) 190 #define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? vtohsp(cp) : ntohsp(cp)) 191 192 kp = (struct krb *)cp; 193 194 if ((&kp->type) >= snapend) { 195 fputs(tstr, stdout); 196 return; 197 } 198 199 type = kp->type & (0xFF << 1); 200 201 printf(" %s %s: ", 202 IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type)); 203 204 switch (type) { 205 206 case AUTH_MSG_KDC_REQUEST: 207 if ((cp = krb4_print_hdr(cp)) == NULL) 208 return; 209 cp += 4; /* ctime */ 210 TCHECK2(cp, 0); 211 printf(" %dmin ", *cp++ * 5); 212 TCHECK2(cp, 0); 213 PRINT; 214 TCHECK2(cp, 0); 215 putchar('.'); PRINT; 216 break; 217 218 case AUTH_MSG_APPL_REQUEST: 219 cp += 2; 220 TCHECK2(cp, 0); 221 printf("v%d ", *cp++); 222 TCHECK2(cp, 0); 223 PRINT; 224 TCHECK2(cp, 0); 225 printf(" (%d)", *cp++); 226 TCHECK2(cp, 0); 227 printf(" (%d)", *cp); 228 TCHECK2(cp, 0); 229 break; 230 231 case AUTH_MSG_KDC_REPLY: 232 if ((cp = krb4_print_hdr(cp)) == NULL) 233 return; 234 cp += 10; /* timestamp + n + exp + kvno */ 235 TCHECK2(cp, 0); 236 len = KTOHSP(kp, cp); 237 printf(" (%d)", len); 238 TCHECK2(cp, 0); 239 break; 240 241 case AUTH_MSG_ERR_REPLY: 242 if ((cp = krb4_print_hdr(cp)) == NULL) 243 return; 244 cp += 4; /* timestamp */ 245 TCHECK2(cp, 0); 246 printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp))); 247 cp += 4; 248 TCHECK2(cp, 0); 249 PRINT; 250 break; 251 252 default: 253 fputs("(unknown)", stdout); 254 break; 255 } 256 257 return; 258 trunc: 259 fputs(tstr, stdout); 260 } 261 262 void 263 krb_print(const u_char *dat, u_int length) 264 { 265 register const struct krb *kp; 266 267 kp = (struct krb *)dat; 268 269 if (dat >= snapend) { 270 fputs(tstr, stdout); 271 return; 272 } 273 274 switch (kp->pvno) { 275 276 case 1: 277 case 2: 278 case 3: 279 printf(" v%d", kp->pvno); 280 break; 281 282 case 4: 283 printf(" v%d", kp->pvno); 284 krb4_print((const u_char*)kp); 285 break; 286 287 case 106: 288 case 107: 289 fputs(" v5", stdout); 290 /* Decode ASN.1 here "someday" */ 291 break; 292 } 293 return; 294 } 295