1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * lib/krb5/rcache/ser_rc.c 9 * 10 * Copyright 1995 by the Massachusetts Institute of Technology. 11 * All Rights Reserved. 12 * 13 * Export of this software from the United States of America may 14 * require a specific license from the United States Government. 15 * It is the responsibility of any person or organization contemplating 16 * export to obtain such a license before exporting. 17 * 18 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 19 * distribute this software and its documentation for any purpose and 20 * without fee is hereby granted, provided that the above copyright 21 * notice appear in all copies and that both that copyright notice and 22 * this permission notice appear in supporting documentation, and that 23 * the name of M.I.T. not be used in advertising or publicity pertaining 24 * to distribution of the software without specific, written prior 25 * permission. Furthermore if you modify this software you must label 26 * your software as modified software and not distribute it in such a 27 * fashion that it might be confused with the original M.I.T. software. 28 * M.I.T. makes no representations about the suitability of 29 * this software for any purpose. It is provided "as is" without express 30 * or implied warranty. 31 * 32 */ 33 34 /* 35 * ser_rcdfl.c - Serialize replay cache context. 36 */ 37 #include "k5-int.h" 38 #include "rc-int.h" 39 40 /* 41 * Routines to deal with externalizing krb5_rcache. 42 * krb5_rcache_size(); 43 * krb5_rcache_externalize(); 44 * krb5_rcache_internalize(); 45 */ 46 static krb5_error_code krb5_rcache_size 47 (krb5_context, krb5_pointer, size_t *); 48 static krb5_error_code krb5_rcache_externalize 49 (krb5_context, krb5_pointer, krb5_octet **, size_t *); 50 static krb5_error_code krb5_rcache_internalize 51 (krb5_context,krb5_pointer *, krb5_octet **, size_t *); 52 53 /* 54 * Serialization entry for this type. 55 */ 56 static const krb5_ser_entry krb5_rcache_ser_entry = { 57 KV5M_RCACHE, /* Type */ 58 krb5_rcache_size, /* Sizer routine */ 59 krb5_rcache_externalize, /* Externalize routine */ 60 krb5_rcache_internalize /* Internalize routine */ 61 }; 62 63 /* 64 * krb5_rcache_size() - Determine the size required to externalize 65 * this krb5_rcache variant. 66 */ 67 static krb5_error_code 68 krb5_rcache_size(krb5_context kcontext, krb5_pointer arg, size_t *sizep) 69 { 70 krb5_error_code kret; 71 krb5_rcache rcache; 72 size_t required; 73 74 kret = EINVAL; 75 /* Solaris Kerberos */ 76 if ((rcache = (krb5_rcache) arg) != NULL) { 77 /* 78 * Saving FILE: variants of krb5_rcache requires at minimum: 79 * krb5_int32 for KV5M_RCACHE 80 * krb5_int32 for length of rcache name. 81 * krb5_int32 for KV5M_RCACHE 82 */ 83 required = sizeof(krb5_int32) * 3; 84 if (rcache->ops && rcache->ops->type) 85 required += (strlen(rcache->ops->type)+1); 86 87 /* 88 * The rcache name is formed as follows: 89 * <type>:<name> 90 */ 91 required += strlen(krb5_rc_get_name(kcontext, rcache)); 92 93 kret = 0; 94 *sizep += required; 95 } 96 return(kret); 97 } 98 99 /* 100 * krb5_rcache_externalize() - Externalize the krb5_rcache. 101 */ 102 static krb5_error_code 103 krb5_rcache_externalize(krb5_context kcontext, krb5_pointer arg, krb5_octet **buffer, size_t *lenremain) 104 { 105 krb5_error_code kret; 106 krb5_rcache rcache; 107 size_t required; 108 krb5_octet *bp; 109 size_t remain; 110 char *rcname; 111 size_t namelen; 112 char *fnamep; 113 114 required = 0; 115 bp = *buffer; 116 remain = *lenremain; 117 kret = EINVAL; 118 /* Solaris Kerberos */ 119 if ((rcache = (krb5_rcache) arg) != NULL) { 120 kret = ENOMEM; 121 if (!krb5_rcache_size(kcontext, arg, &required) && 122 (required <= remain)) { 123 /* Our identifier */ 124 (void) krb5_ser_pack_int32(KV5M_RCACHE, &bp, &remain); 125 126 /* Calculate the length of the name */ 127 namelen = (rcache->ops && rcache->ops->type) ? 128 strlen(rcache->ops->type)+1 : 0; 129 fnamep = krb5_rc_get_name(kcontext, rcache); 130 namelen += (strlen(fnamep)+1); 131 132 if ((rcname = (char *) malloc(namelen))) { 133 /* Format the rcache name. */ 134 if (rcache->ops && rcache->ops->type) 135 sprintf(rcname, "%s:%s", rcache->ops->type, fnamep); 136 else 137 strcpy(rcname, fnamep); 138 139 /* Put the length of the file name */ 140 (void) krb5_ser_pack_int32((krb5_int32) strlen(rcname), 141 &bp, &remain); 142 143 /* Put the name */ 144 (void) krb5_ser_pack_bytes((krb5_octet *) rcname, 145 strlen(rcname), 146 &bp, &remain); 147 148 /* Put the trailer */ 149 (void) krb5_ser_pack_int32(KV5M_RCACHE, &bp, &remain); 150 kret = 0; 151 *buffer = bp; 152 *lenremain = remain; 153 free(rcname); 154 } 155 } 156 } 157 return(kret); 158 } 159 160 /* 161 * krb5_rcache_internalize() - Internalize the krb5_rcache. 162 */ 163 static krb5_error_code 164 krb5_rcache_internalize(krb5_context kcontext, krb5_pointer *argp, krb5_octet **buffer, size_t *lenremain) 165 { 166 krb5_error_code kret; 167 krb5_rcache rcache; 168 krb5_int32 ibuf; 169 krb5_octet *bp; 170 size_t remain; 171 char *rcname; 172 173 bp = *buffer; 174 remain = *lenremain; 175 kret = EINVAL; 176 /* Read our magic number */ 177 if (krb5_ser_unpack_int32(&ibuf, &bp, &remain)) 178 ibuf = 0; 179 if (ibuf == KV5M_RCACHE) { 180 kret = ENOMEM; 181 182 /* Get the length of the rcache name */ 183 kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain); 184 185 if (!kret && 186 (rcname = (char *) malloc((size_t) (ibuf+1))) && 187 !(kret = krb5_ser_unpack_bytes((krb5_octet *) rcname, 188 (size_t) ibuf, 189 &bp, &remain))) { 190 rcname[ibuf] = '\0'; 191 if (!(kret = krb5_rc_resolve_full(kcontext, &rcache, rcname))) { 192 (void) krb5_rc_recover(kcontext, rcache); 193 if (!kret && 194 !(kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain)) && 195 (ibuf == KV5M_RCACHE)) { 196 *buffer = bp; 197 *lenremain = remain; 198 *argp = (krb5_pointer) rcache; 199 } 200 else /* Solaris Kerberos */ 201 (void)krb5_rc_close(kcontext, rcache); 202 } 203 free(rcname); 204 } 205 } 206 return(kret); 207 } 208 209 /* 210 * Register the rcache serializer. 211 */ 212 krb5_error_code KRB5_CALLCONV 213 krb5_ser_rcache_init(krb5_context kcontext) 214 { 215 return(krb5_register_serializer(kcontext, &krb5_rcache_ser_entry)); 216 } 217