1 /* 2 * lib/krb5/krb/kdc_rep_dc.c 3 * 4 * Copyright 1990 by the Massachusetts Institute of Technology. 5 * All Rights Reserved. 6 * 7 * Export of this software from the United States of America may 8 * require a specific license from the United States Government. 9 * It is the responsibility of any person or organization contemplating 10 * export to obtain such a license before exporting. 11 * 12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 13 * distribute this software and its documentation for any purpose and 14 * without fee is hereby granted, provided that the above copyright 15 * notice appear in all copies and that both that copyright notice and 16 * this permission notice appear in supporting documentation, and that 17 * the name of M.I.T. not be used in advertising or publicity pertaining 18 * to distribution of the software without specific, written prior 19 * permission. Furthermore if you modify this software you must label 20 * your software as modified software and not distribute it in such a 21 * fashion that it might be confused with the original M.I.T. software. 22 * M.I.T. makes no representations about the suitability of 23 * this software for any purpose. It is provided "as is" without express 24 * or implied warranty. 25 * 26 * 27 * krb5_kdc_rep_decrypt_proc() 28 */ 29 30 #include "k5-int.h" 31 32 /* 33 * Decrypt the encrypted portion of the KDC_REP message, using the key 34 * passed. 35 * 36 */ 37 38 /*ARGSUSED*/ 39 krb5_error_code 40 krb5_kdc_rep_decrypt_proc(krb5_context context, const krb5_keyblock *key, krb5_const_pointer decryptarg, krb5_kdc_rep *dec_rep) 41 { 42 krb5_error_code retval; 43 krb5_data scratch; 44 krb5_enc_kdc_rep_part *local_encpart; 45 krb5_keyusage usage; 46 47 if (decryptarg) { 48 usage = *(const krb5_keyusage *) decryptarg; 49 } else { 50 usage = KRB5_KEYUSAGE_AS_REP_ENCPART; 51 } 52 53 /* set up scratch decrypt/decode area */ 54 55 scratch.length = dec_rep->enc_part.ciphertext.length; 56 if (!(scratch.data = malloc(dec_rep->enc_part.ciphertext.length))) { 57 return(ENOMEM); 58 } 59 60 /*dec_rep->enc_part.enctype;*/ 61 62 if ((retval = krb5_c_decrypt(context, key, usage, 0, &dec_rep->enc_part, 63 &scratch))) { 64 free(scratch.data); 65 return(retval); 66 } 67 68 #define clean_scratch() {memset(scratch.data, 0, scratch.length); \ 69 free(scratch.data);} 70 71 /* and do the decode */ 72 retval = decode_krb5_enc_kdc_rep_part(&scratch, &local_encpart); 73 clean_scratch(); 74 if (retval) 75 return retval; 76 77 dec_rep->enc_part2 = local_encpart; 78 79 return 0; 80 } 81