1 /* $OpenBSD: print-krb.c,v 1.13 2020/01/24 22:46:37 procter 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 #include <sys/time.h> 27 #include <sys/socket.h> 28 29 #include <netinet/in.h> 30 #include <netinet/ip.h> 31 #include <netinet/ip_var.h> 32 #include <netinet/udp.h> 33 #include <netinet/udp_var.h> 34 35 #include <ctype.h> 36 #include <errno.h> 37 #include <stdio.h> 38 39 #include "interface.h" 40 #include "addrtoname.h" 41 42 const u_char *c_print(const u_char *, const u_char *); 43 const u_char *krb4_print_hdr(const u_char *); 44 void krb4_print(const u_char *); 45 void krb_print(const u_char *, u_int); 46 47 48 #define AUTH_MSG_KDC_REQUEST 1<<1 49 #define AUTH_MSG_KDC_REPLY 2<<1 50 #define AUTH_MSG_APPL_REQUEST 3<<1 51 #define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1 52 #define AUTH_MSG_ERR_REPLY 5<<1 53 #define AUTH_MSG_PRIVATE 6<<1 54 #define AUTH_MSG_SAFE 7<<1 55 #define AUTH_MSG_APPL_ERR 8<<1 56 #define AUTH_MSG_DIE 63<<1 57 58 #define KERB_ERR_OK 0 59 #define KERB_ERR_NAME_EXP 1 60 #define KERB_ERR_SERVICE_EXP 2 61 #define KERB_ERR_AUTH_EXP 3 62 #define KERB_ERR_PKT_VER 4 63 #define KERB_ERR_NAME_MAST_KEY_VER 5 64 #define KERB_ERR_SERV_MAST_KEY_VER 6 65 #define KERB_ERR_BYTE_ORDER 7 66 #define KERB_ERR_PRINCIPAL_UNKNOWN 8 67 #define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9 68 #define KERB_ERR_NULL_KEY 10 69 70 struct krb { 71 u_char pvno; /* Protocol Version */ 72 u_char type; /* Type+B */ 73 }; 74 75 static char tstr[] = " [|kerberos]"; 76 77 static struct tok type2str[] = { 78 { AUTH_MSG_KDC_REQUEST, "KDC_REQUEST" }, 79 { AUTH_MSG_KDC_REPLY, "KDC_REPLY" }, 80 { AUTH_MSG_APPL_REQUEST, "APPL_REQUEST" }, 81 { AUTH_MSG_APPL_REQUEST_MUTUAL, "APPL_REQUEST_MUTUAL" }, 82 { AUTH_MSG_ERR_REPLY, "ERR_REPLY" }, 83 { AUTH_MSG_PRIVATE, "PRIVATE" }, 84 { AUTH_MSG_SAFE, "SAFE" }, 85 { AUTH_MSG_APPL_ERR, "APPL_ERR" }, 86 { AUTH_MSG_DIE, "DIE" }, 87 { 0, NULL } 88 }; 89 90 static struct tok kerr2str[] = { 91 { KERB_ERR_OK, "OK" }, 92 { KERB_ERR_NAME_EXP, "NAME_EXP" }, 93 { KERB_ERR_SERVICE_EXP, "SERVICE_EXP" }, 94 { KERB_ERR_AUTH_EXP, "AUTH_EXP" }, 95 { KERB_ERR_PKT_VER, "PKT_VER" }, 96 { KERB_ERR_NAME_MAST_KEY_VER, "NAME_MAST_KEY_VER" }, 97 { KERB_ERR_SERV_MAST_KEY_VER, "SERV_MAST_KEY_VER" }, 98 { KERB_ERR_BYTE_ORDER, "BYTE_ORDER" }, 99 { KERB_ERR_PRINCIPAL_UNKNOWN, "PRINCIPAL_UNKNOWN" }, 100 { KERB_ERR_PRINCIPAL_NOT_UNIQUE,"PRINCIPAL_NOT_UNIQUE" }, 101 { KERB_ERR_NULL_KEY, "NULL_KEY"}, 102 { 0, NULL} 103 }; 104 105 106 /* little endian (unaligned) to host byte order */ 107 /* XXX need to look at this... */ 108 #define vtohlp(x) ((( ((char *)(x))[0] ) ) | \ 109 (( ((char *)(x))[1] ) << 8) | \ 110 (( ((char *)(x))[2] ) << 16) | \ 111 (( ((char *)(x))[3] ) << 24)) 112 #define vtohsp(x) ((( ((char *)(x))[0] ) ) | \ 113 (( ((char *)(x))[1] ) << 8)) 114 /* network (big endian) (unaligned) to host byte order */ 115 #define ntohlp(x) ((( ((char *)(x))[3] ) ) | \ 116 (( ((char *)(x))[2] ) << 8) | \ 117 (( ((char *)(x))[1] ) << 16) | \ 118 (( ((char *)(x))[0] ) << 24)) 119 #define ntohsp(x) ((( ((char *)(x))[1] ) ) | \ 120 (( ((char *)(x))[0] ) << 8)) 121 122 123 124 const u_char * 125 c_print(const u_char *s, const u_char *ep) 126 { 127 u_char c; 128 int flag; 129 130 flag = 1; 131 while (ep == NULL || s < ep) { 132 c = *s++; 133 if (c == '\0') { 134 flag = 0; 135 break; 136 } 137 if (!isascii(c)) { 138 c = toascii(c); 139 putchar('M'); 140 putchar('-'); 141 } 142 if (!isprint(c)) { 143 c ^= 0x40; /* DEL to ?, others to alpha */ 144 putchar('^'); 145 } 146 putchar(c); 147 } 148 if (flag) 149 return NULL; 150 return (s); 151 } 152 153 const u_char * 154 krb4_print_hdr(const u_char *cp) 155 { 156 cp += 2; 157 158 #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc 159 160 TCHECK2(cp, 0); 161 PRINT; 162 TCHECK2(cp, 0); 163 putchar('.'); PRINT; 164 TCHECK2(cp, 0); 165 putchar('@'); PRINT; 166 return(cp); 167 168 trunc: 169 printf("%s", tstr); 170 return (NULL); 171 172 #undef PRINT 173 } 174 175 void 176 krb4_print(const u_char *cp) 177 { 178 const struct krb *kp; 179 u_char type; 180 u_short len; 181 182 #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc 183 /* True if struct krb is little endian */ 184 #define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0) 185 #define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? vtohsp(cp) : ntohsp(cp)) 186 187 kp = (struct krb *)cp; 188 189 if ((&kp->type) >= snapend) { 190 printf("%s", tstr); 191 return; 192 } 193 194 type = kp->type & (0xFF << 1); 195 196 printf(" %s %s: ", 197 IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type)); 198 199 switch (type) { 200 201 case AUTH_MSG_KDC_REQUEST: 202 if ((cp = krb4_print_hdr(cp)) == NULL) 203 return; 204 cp += 4; /* ctime */ 205 TCHECK2(cp, 0); 206 printf(" %dmin ", *cp++ * 5); 207 TCHECK2(cp, 0); 208 PRINT; 209 TCHECK2(cp, 0); 210 putchar('.'); PRINT; 211 break; 212 213 case AUTH_MSG_APPL_REQUEST: 214 cp += 2; 215 TCHECK2(cp, 0); 216 printf("v%d ", *cp++); 217 TCHECK2(cp, 0); 218 PRINT; 219 TCHECK2(cp, 0); 220 printf(" (%d)", *cp++); 221 TCHECK2(cp, 0); 222 printf(" (%d)", *cp); 223 TCHECK2(cp, 0); 224 break; 225 226 case AUTH_MSG_KDC_REPLY: 227 if ((cp = krb4_print_hdr(cp)) == NULL) 228 return; 229 cp += 10; /* timestamp + n + exp + kvno */ 230 TCHECK2(cp, 0); 231 len = KTOHSP(kp, cp); 232 printf(" (%d)", len); 233 TCHECK2(cp, 0); 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, 0); 241 printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp))); 242 cp += 4; 243 TCHECK2(cp, 0); 244 PRINT; 245 break; 246 247 default: 248 printf("(unknown)"); 249 break; 250 } 251 252 return; 253 trunc: 254 printf("%s", tstr); 255 } 256 257 void 258 krb_print(const u_char *dat, u_int length) 259 { 260 const struct krb *kp; 261 262 kp = (struct krb *)dat; 263 264 if (dat >= snapend) { 265 printf("%s", tstr); 266 return; 267 } 268 269 switch (kp->pvno) { 270 271 case 1: 272 case 2: 273 case 3: 274 printf("v%d", kp->pvno); 275 break; 276 277 case 4: 278 printf("v%d", kp->pvno); 279 krb4_print((const u_char *)kp); 280 break; 281 282 case 106: 283 case 107: 284 printf("v5"); 285 /* Decode ASN.1 here "someday" */ 286 break; 287 } 288 return; 289 } 290