1 /* 2 * Copyright 2005 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/krb/kdc_rep_dc.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 * krb5_kdc_rep_decrypt_proc() 35 */ 36 37 #include <k5-int.h> 38 39 /* 40 * Decrypt the encrypted portion of the KDC_REP message, using the key 41 * passed. 42 * 43 */ 44 45 /*ARGSUSED*/ 46 krb5_error_code 47 krb5_kdc_rep_decrypt_proc(krb5_context context, const krb5_keyblock *key, krb5_const_pointer decryptarg, krb5_kdc_rep *dec_rep) 48 { 49 krb5_error_code retval; 50 krb5_data scratch; 51 krb5_enc_kdc_rep_part *local_encpart; 52 krb5_keyusage usage; 53 54 if (decryptarg) { 55 usage = *(const krb5_keyusage *) decryptarg; 56 } else { 57 usage = KRB5_KEYUSAGE_AS_REP_ENCPART; 58 } 59 60 /* set up scratch decrypt/decode area */ 61 62 scratch.length = dec_rep->enc_part.ciphertext.length; 63 if (!(scratch.data = malloc(dec_rep->enc_part.ciphertext.length))) { 64 return(ENOMEM); 65 } 66 67 /*(void) (dec_rep->enc_part.enctype);*/ 68 69 retval = krb5_c_decrypt(context, key, usage, 0, &dec_rep->enc_part, 70 &scratch); 71 if (retval) { 72 free(scratch.data); 73 return(retval); 74 } 75 76 #define clean_scratch() {memset(scratch.data, 0, scratch.length); \ 77 free(scratch.data);} 78 79 /* and do the decode */ 80 retval = decode_krb5_enc_kdc_rep_part(&scratch, &local_encpart); 81 clean_scratch(); 82 if (retval) 83 return retval; 84 85 dec_rep->enc_part2 = local_encpart; 86 87 return 0; 88 } 89