print-krb.c revision 1.4.8.1
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 (at) mit.edu). 22 */ 23 24 #include <sys/cdefs.h> 25 #ifndef lint 26 __RCSID("$NetBSD: print-krb.c,v 1.4.8.1 2017/03/13 07:41:14 skrll Exp $"); 27 #endif 28 29 /* \summary: Kerberos printer */ 30 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 35 #include <netdissect-stdinc.h> 36 37 #include "netdissect.h" 38 #include "extract.h" 39 40 static const char tstr[] = " [|kerberos]"; 41 42 static const u_char *c_print(netdissect_options *, register const u_char *, register const u_char *); 43 static const u_char *krb4_print_hdr(netdissect_options *, const u_char *); 44 static void krb4_print(netdissect_options *, const u_char *); 45 46 #define AUTH_MSG_KDC_REQUEST 1<<1 47 #define AUTH_MSG_KDC_REPLY 2<<1 48 #define AUTH_MSG_APPL_REQUEST 3<<1 49 #define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1 50 #define AUTH_MSG_ERR_REPLY 5<<1 51 #define AUTH_MSG_PRIVATE 6<<1 52 #define AUTH_MSG_SAFE 7<<1 53 #define AUTH_MSG_APPL_ERR 8<<1 54 #define AUTH_MSG_DIE 63<<1 55 56 #define KERB_ERR_OK 0 57 #define KERB_ERR_NAME_EXP 1 58 #define KERB_ERR_SERVICE_EXP 2 59 #define KERB_ERR_AUTH_EXP 3 60 #define KERB_ERR_PKT_VER 4 61 #define KERB_ERR_NAME_MAST_KEY_VER 5 62 #define KERB_ERR_SERV_MAST_KEY_VER 6 63 #define KERB_ERR_BYTE_ORDER 7 64 #define KERB_ERR_PRINCIPAL_UNKNOWN 8 65 #define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9 66 #define KERB_ERR_NULL_KEY 10 67 68 struct krb { 69 uint8_t pvno; /* Protocol Version */ 70 uint8_t type; /* Type+B */ 71 }; 72 73 static const struct tok type2str[] = { 74 { AUTH_MSG_KDC_REQUEST, "KDC_REQUEST" }, 75 { AUTH_MSG_KDC_REPLY, "KDC_REPLY" }, 76 { AUTH_MSG_APPL_REQUEST, "APPL_REQUEST" }, 77 { AUTH_MSG_APPL_REQUEST_MUTUAL, "APPL_REQUEST_MUTUAL" }, 78 { AUTH_MSG_ERR_REPLY, "ERR_REPLY" }, 79 { AUTH_MSG_PRIVATE, "PRIVATE" }, 80 { AUTH_MSG_SAFE, "SAFE" }, 81 { AUTH_MSG_APPL_ERR, "APPL_ERR" }, 82 { AUTH_MSG_DIE, "DIE" }, 83 { 0, NULL } 84 }; 85 86 static const struct tok kerr2str[] = { 87 { KERB_ERR_OK, "OK" }, 88 { KERB_ERR_NAME_EXP, "NAME_EXP" }, 89 { KERB_ERR_SERVICE_EXP, "SERVICE_EXP" }, 90 { KERB_ERR_AUTH_EXP, "AUTH_EXP" }, 91 { KERB_ERR_PKT_VER, "PKT_VER" }, 92 { KERB_ERR_NAME_MAST_KEY_VER, "NAME_MAST_KEY_VER" }, 93 { KERB_ERR_SERV_MAST_KEY_VER, "SERV_MAST_KEY_VER" }, 94 { KERB_ERR_BYTE_ORDER, "BYTE_ORDER" }, 95 { KERB_ERR_PRINCIPAL_UNKNOWN, "PRINCIPAL_UNKNOWN" }, 96 { KERB_ERR_PRINCIPAL_NOT_UNIQUE,"PRINCIPAL_NOT_UNIQUE" }, 97 { KERB_ERR_NULL_KEY, "NULL_KEY"}, 98 { 0, NULL} 99 }; 100 101 static const u_char * 102 c_print(netdissect_options *ndo, 103 register const u_char *s, register const u_char *ep) 104 { 105 register u_char c; 106 register int flag; 107 108 flag = 1; 109 while (s < ep) { 110 c = *s++; 111 if (c == '\0') { 112 flag = 0; 113 break; 114 } 115 if (!ND_ISASCII(c)) { 116 c = ND_TOASCII(c); 117 ND_PRINT((ndo, "M-")); 118 } 119 if (!ND_ISPRINT(c)) { 120 c ^= 0x40; /* DEL to ?, others to alpha */ 121 ND_PRINT((ndo, "^")); 122 } 123 ND_PRINT((ndo, "%c", c)); 124 } 125 if (flag) 126 return NULL; 127 return (s); 128 } 129 130 static const u_char * 131 krb4_print_hdr(netdissect_options *ndo, 132 const u_char *cp) 133 { 134 cp += 2; 135 136 #define PRINT if ((cp = c_print(ndo, cp, ndo->ndo_snapend)) == NULL) goto trunc 137 138 PRINT; 139 ND_PRINT((ndo, ".")); 140 PRINT; 141 ND_PRINT((ndo, "@")); 142 PRINT; 143 return (cp); 144 145 trunc: 146 ND_PRINT((ndo, "%s", tstr)); 147 return (NULL); 148 149 #undef PRINT 150 } 151 152 static void 153 krb4_print(netdissect_options *ndo, 154 const u_char *cp) 155 { 156 register const struct krb *kp; 157 u_char type; 158 u_short len; 159 160 #define PRINT if ((cp = c_print(ndo, cp, ndo->ndo_snapend)) == NULL) goto trunc 161 /* True if struct krb is little endian */ 162 #define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0) 163 #define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? EXTRACT_LE_16BITS(cp) : EXTRACT_16BITS(cp)) 164 165 kp = (const struct krb *)cp; 166 167 if ((&kp->type) >= ndo->ndo_snapend) { 168 ND_PRINT((ndo, "%s", tstr)); 169 return; 170 } 171 172 type = kp->type & (0xFF << 1); 173 174 ND_PRINT((ndo, " %s %s: ", 175 IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type))); 176 177 switch (type) { 178 179 case AUTH_MSG_KDC_REQUEST: 180 if ((cp = krb4_print_hdr(ndo, cp)) == NULL) 181 return; 182 cp += 4; /* ctime */ 183 ND_TCHECK(*cp); 184 ND_PRINT((ndo, " %dmin ", *cp++ * 5)); 185 PRINT; 186 ND_PRINT((ndo, ".")); 187 PRINT; 188 break; 189 190 case AUTH_MSG_APPL_REQUEST: 191 cp += 2; 192 ND_TCHECK(*cp); 193 ND_PRINT((ndo, "v%d ", *cp++)); 194 PRINT; 195 ND_TCHECK(*cp); 196 ND_PRINT((ndo, " (%d)", *cp++)); 197 ND_TCHECK(*cp); 198 ND_PRINT((ndo, " (%d)", *cp)); 199 break; 200 201 case AUTH_MSG_KDC_REPLY: 202 if ((cp = krb4_print_hdr(ndo, cp)) == NULL) 203 return; 204 cp += 10; /* timestamp + n + exp + kvno */ 205 ND_TCHECK2(*cp, sizeof(short)); 206 len = KTOHSP(kp, cp); 207 ND_PRINT((ndo, " (%d)", len)); 208 break; 209 210 case AUTH_MSG_ERR_REPLY: 211 if ((cp = krb4_print_hdr(ndo, cp)) == NULL) 212 return; 213 cp += 4; /* timestamp */ 214 ND_TCHECK2(*cp, sizeof(short)); 215 ND_PRINT((ndo, " %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp)))); 216 cp += 4; 217 PRINT; 218 break; 219 220 default: 221 ND_PRINT((ndo, "(unknown)")); 222 break; 223 } 224 225 return; 226 trunc: 227 ND_PRINT((ndo, "%s", tstr)); 228 } 229 230 void 231 krb_print(netdissect_options *ndo, 232 const u_char *dat) 233 { 234 register const struct krb *kp; 235 236 kp = (const struct krb *)dat; 237 238 if (dat >= ndo->ndo_snapend) { 239 ND_PRINT((ndo, "%s", tstr)); 240 return; 241 } 242 243 switch (kp->pvno) { 244 245 case 1: 246 case 2: 247 case 3: 248 ND_PRINT((ndo, " v%d", kp->pvno)); 249 break; 250 251 case 4: 252 ND_PRINT((ndo, " v%d", kp->pvno)); 253 krb4_print(ndo, (const u_char *)kp); 254 break; 255 256 case 106: 257 case 107: 258 ND_PRINT((ndo, " v5")); 259 /* Decode ASN.1 here "someday" */ 260 break; 261 } 262 return; 263 } 264
Indexes created Fri May 01 00:23:41 UTC 2026