1 /* $OpenBSD: print-krb.c,v 1.7 2007/10/07 16:41:05 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 * 23 * Initial contribution from John Hawkinson (jhawk@mit.edu). 24 */ 25 26 #ifndef lint 27 static const char rcsid[] = 28 "@(#) $Id: print-krb.c,v 1.7 2007/10/07 16:41:05 deraadt Exp $"; 29 #endif 30 31 #include <sys/param.h> 32 #include <sys/time.h> 33 #include <sys/socket.h> 34 35 #include <netinet/in.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/ip.h> 38 #include <netinet/ip_var.h> 39 #include <netinet/udp.h> 40 #include <netinet/udp_var.h> 41 42 #include <ctype.h> 43 #include <errno.h> 44 #include <stdio.h> 45 46 #include "interface.h" 47 #include "addrtoname.h" 48 49 const u_char *c_print(register const u_char *, register const u_char *); 50 const u_char *krb4_print_hdr(const u_char *); 51 void krb4_print(const u_char *); 52 void krb_print(const u_char *, u_int); 53 54 55 #define AUTH_MSG_KDC_REQUEST 1<<1 56 #define AUTH_MSG_KDC_REPLY 2<<1 57 #define AUTH_MSG_APPL_REQUEST 3<<1 58 #define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1 59 #define AUTH_MSG_ERR_REPLY 5<<1 60 #define AUTH_MSG_PRIVATE 6<<1 61 #define AUTH_MSG_SAFE 7<<1 62 #define AUTH_MSG_APPL_ERR 8<<1 63 #define AUTH_MSG_DIE 63<<1 64 65 #define KERB_ERR_OK 0 66 #define KERB_ERR_NAME_EXP 1 67 #define KERB_ERR_SERVICE_EXP 2 68 #define KERB_ERR_AUTH_EXP 3 69 #define KERB_ERR_PKT_VER 4 70 #define KERB_ERR_NAME_MAST_KEY_VER 5 71 #define KERB_ERR_SERV_MAST_KEY_VER 6 72 #define KERB_ERR_BYTE_ORDER 7 73 #define KERB_ERR_PRINCIPAL_UNKNOWN 8 74 #define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9 75 #define KERB_ERR_NULL_KEY 10 76 77 struct krb { 78 u_char pvno; /* Protocol Version */ 79 u_char type; /* Type+B */ 80 }; 81 82 static char tstr[] = " [|kerberos]"; 83 84 static struct tok type2str[] = { 85 { AUTH_MSG_KDC_REQUEST, "KDC_REQUEST" }, 86 { AUTH_MSG_KDC_REPLY, "KDC_REPLY" }, 87 { AUTH_MSG_APPL_REQUEST, "APPL_REQUEST" }, 88 { AUTH_MSG_APPL_REQUEST_MUTUAL, "APPL_REQUEST_MUTUAL" }, 89 { AUTH_MSG_ERR_REPLY, "ERR_REPLY" }, 90 { AUTH_MSG_PRIVATE, "PRIVATE" }, 91 { AUTH_MSG_SAFE, "SAFE" }, 92 { AUTH_MSG_APPL_ERR, "APPL_ERR" }, 93 { AUTH_MSG_DIE, "DIE" }, 94 { 0, NULL } 95 }; 96 97 static struct tok kerr2str[] = { 98 { KERB_ERR_OK, "OK" }, 99 { KERB_ERR_NAME_EXP, "NAME_EXP" }, 100 { KERB_ERR_SERVICE_EXP, "SERVICE_EXP" }, 101 { KERB_ERR_AUTH_EXP, "AUTH_EXP" }, 102 { KERB_ERR_PKT_VER, "PKT_VER" }, 103 { KERB_ERR_NAME_MAST_KEY_VER, "NAME_MAST_KEY_VER" }, 104 { KERB_ERR_SERV_MAST_KEY_VER, "SERV_MAST_KEY_VER" }, 105 { KERB_ERR_BYTE_ORDER, "BYTE_ORDER" }, 106 { KERB_ERR_PRINCIPAL_UNKNOWN, "PRINCIPAL_UNKNOWN" }, 107 { KERB_ERR_PRINCIPAL_NOT_UNIQUE,"PRINCIPAL_NOT_UNIQUE" }, 108 { KERB_ERR_NULL_KEY, "NULL_KEY"}, 109 { 0, NULL} 110 }; 111 112 113 /* little endian (unaligned) to host byte order */ 114 /* XXX need to look at this... */ 115 #define vtohlp(x) ((( ((char *)(x))[0] ) ) | \ 116 (( ((char *)(x))[1] ) << 8) | \ 117 (( ((char *)(x))[2] ) << 16) | \ 118 (( ((char *)(x))[3] ) << 24)) 119 #define vtohsp(x) ((( ((char *)(x))[0] ) ) | \ 120 (( ((char *)(x))[1] ) << 8)) 121 /* network (big endian) (unaligned) to host byte order */ 122 #define ntohlp(x) ((( ((char *)(x))[3] ) ) | \ 123 (( ((char *)(x))[2] ) << 8) | \ 124 (( ((char *)(x))[1] ) << 16) | \ 125 (( ((char *)(x))[0] ) << 24)) 126 #define ntohsp(x) ((( ((char *)(x))[1] ) ) | \ 127 (( ((char *)(x))[0] ) << 8)) 128 129 130 131 const u_char * 132 c_print(register const u_char *s, register const u_char *ep) 133 { 134 register u_char c; 135 register int flag; 136 137 flag = 1; 138 while (ep == NULL || s < ep) { 139 c = *s++; 140 if (c == '\0') { 141 flag = 0; 142 break; 143 } 144 if (!isascii(c)) { 145 c = toascii(c); 146 putchar('M'); 147 putchar('-'); 148 } 149 if (!isprint(c)) { 150 c ^= 0x40; /* DEL to ?, others to alpha */ 151 putchar('^'); 152 } 153 putchar(c); 154 } 155 if (flag) 156 return NULL; 157 return (s); 158 } 159 160 const u_char * 161 krb4_print_hdr(const u_char *cp) 162 { 163 cp += 2; 164 165 #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc 166 167 TCHECK2(cp, 0); 168 PRINT; 169 TCHECK2(cp, 0); 170 putchar('.'); PRINT; 171 TCHECK2(cp, 0); 172 putchar('@'); PRINT; 173 return(cp); 174 175 trunc: 176 fputs(tstr, stdout); 177 return (NULL); 178 179 #undef PRINT 180 } 181 182 void 183 krb4_print(const u_char *cp) 184 { 185 register const struct krb *kp; 186 u_char type; 187 u_short len; 188 189 #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc 190 /* True if struct krb is little endian */ 191 #define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0) 192 #define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? vtohsp(cp) : ntohsp(cp)) 193 194 kp = (struct krb *)cp; 195 196 if ((&kp->type) >= snapend) { 197 fputs(tstr, stdout); 198 return; 199 } 200 201 type = kp->type & (0xFF << 1); 202 203 printf(" %s %s: ", 204 IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type)); 205 206 switch (type) { 207 208 case AUTH_MSG_KDC_REQUEST: 209 if ((cp = krb4_print_hdr(cp)) == NULL) 210 return; 211 cp += 4; /* ctime */ 212 TCHECK2(cp, 0); 213 printf(" %dmin ", *cp++ * 5); 214 TCHECK2(cp, 0); 215 PRINT; 216 TCHECK2(cp, 0); 217 putchar('.'); PRINT; 218 break; 219 220 case AUTH_MSG_APPL_REQUEST: 221 cp += 2; 222 TCHECK2(cp, 0); 223 printf("v%d ", *cp++); 224 TCHECK2(cp, 0); 225 PRINT; 226 TCHECK2(cp, 0); 227 printf(" (%d)", *cp++); 228 TCHECK2(cp, 0); 229 printf(" (%d)", *cp); 230 TCHECK2(cp, 0); 231 break; 232 233 case AUTH_MSG_KDC_REPLY: 234 if ((cp = krb4_print_hdr(cp)) == NULL) 235 return; 236 cp += 10; /* timestamp + n + exp + kvno */ 237 TCHECK2(cp, 0); 238 len = KTOHSP(kp, cp); 239 printf(" (%d)", len); 240 TCHECK2(cp, 0); 241 break; 242 243 case AUTH_MSG_ERR_REPLY: 244 if ((cp = krb4_print_hdr(cp)) == NULL) 245 return; 246 cp += 4; /* timestamp */ 247 TCHECK2(cp, 0); 248 printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp))); 249 cp += 4; 250 TCHECK2(cp, 0); 251 PRINT; 252 break; 253 254 default: 255 fputs("(unknown)", stdout); 256 break; 257 } 258 259 return; 260 trunc: 261 fputs(tstr, stdout); 262 } 263 264 void 265 krb_print(const u_char *dat, u_int length) 266 { 267 register const struct krb *kp; 268 269 kp = (struct krb *)dat; 270 271 if (dat >= snapend) { 272 fputs(tstr, stdout); 273 return; 274 } 275 276 switch (kp->pvno) { 277 278 case 1: 279 case 2: 280 case 3: 281 printf(" v%d", kp->pvno); 282 break; 283 284 case 4: 285 printf(" v%d", kp->pvno); 286 krb4_print((const u_char *)kp); 287 break; 288 289 case 106: 290 case 107: 291 fputs(" v5", stdout); 292 /* Decode ASN.1 here "someday" */ 293 break; 294 } 295 return; 296 } 297