1 /* 2 * Copyright 2002 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 #pragma ident "%Z%%M% %I% %E% SMI" 7 8 /* 9 * lib/krb5/keytab/read_servi.c 10 * 11 * Copyright 1990 by the Massachusetts Institute of Technology. 12 * All Rights Reserved. 13 * 14 * Export of this software from the United States of America may 15 * require a specific license from the United States Government. 16 * It is the responsibility of any person or organization contemplating 17 * export to obtain such a license before exporting. 18 * 19 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 20 * distribute this software and its documentation for any purpose and 21 * without fee is hereby granted, provided that the above copyright 22 * notice appear in all copies and that both that copyright notice and 23 * this permission notice appear in supporting documentation, and that 24 * the name of M.I.T. not be used in advertising or publicity pertaining 25 * to distribution of the software without specific, written prior 26 * permission. Furthermore if you modify this software you must label 27 * your software as modified software and not distribute it in such a 28 * fashion that it might be confused with the original M.I.T. software. 29 * M.I.T. makes no representations about the suitability of 30 * this software for any purpose. It is provided "as is" without express 31 * or implied warranty. 32 * 33 * 34 * This routine is designed to be passed to krb5_rd_req. 35 * It is a convenience function that reads a key out of a keytab. 36 * It handles all of the opening and closing of the keytab 37 * internally. 38 */ 39 40 #include <k5-int.h> 41 42 #define KSUCCESS 0 43 44 /* 45 * effects: If keyprocarg is not NULL, it is taken to be the name of a 46 * keytab. Otherwise, the default keytab will be used. This 47 * routine opens the keytab and finds the principal associated with 48 * principal, vno, and enctype and returns the resulting key in *key 49 * or returning an error code if it is not found. 50 * returns: Either KSUCCESS or error code. 51 * errors: error code if not found or keyprocarg is invalid. 52 */ 53 KRB5_DLLIMP krb5_error_code KRB5_CALLCONV 54 krb5_kt_read_service_key(context, keyprocarg, principal, vno, enctype, key) 55 krb5_context context; 56 krb5_pointer keyprocarg; 57 krb5_principal principal; 58 krb5_kvno vno; 59 krb5_enctype enctype; 60 krb5_keyblock FAR * FAR * key; 61 { 62 krb5_error_code kerror = KSUCCESS; 63 char keytabname[MAX_KEYTAB_NAME_LEN + 1]; /* + 1 for NULL termination */ 64 krb5_keytab id; 65 krb5_keytab_entry entry; 66 67 /* 68 * Get the name of the file that we should use. 69 */ 70 if (!keyprocarg) { 71 if ((kerror = krb5_kt_default_name(context, (char *)keytabname, 72 sizeof(keytabname) - 1))!= KSUCCESS) 73 return (kerror); 74 } else { 75 memset(keytabname, 0, sizeof(keytabname)); 76 (void) strncpy(keytabname, (char *)keyprocarg, 77 sizeof(keytabname) - 1); 78 } 79 80 if ((kerror = krb5_kt_resolve(context, (char *)keytabname, &id))) 81 return (kerror); 82 83 kerror = krb5_kt_get_entry(context, id, principal, vno, enctype, &entry); 84 (void) krb5_kt_close(context, id); 85 86 if (kerror) 87 return(kerror); 88 89 krb5_copy_keyblock(context, &entry.key, key); 90 91 krb5_kt_free_entry(context, &entry); 92 93 return (KSUCCESS); 94 } 95