17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * lib/krb5/krb/kdc_rep_dc.c 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * Copyright 1990 by the Massachusetts Institute of Technology. 57c478bd9Sstevel@tonic-gate * All Rights Reserved. 67c478bd9Sstevel@tonic-gate * 77c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may 87c478bd9Sstevel@tonic-gate * require a specific license from the United States Government. 97c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating 107c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting. 117c478bd9Sstevel@tonic-gate * 127c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 137c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 147c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 157c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 167c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 177c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining 187c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 197c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label 207c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a 217c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software. 227c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of 237c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 247c478bd9Sstevel@tonic-gate * or implied warranty. 257c478bd9Sstevel@tonic-gate * 267c478bd9Sstevel@tonic-gate * 277c478bd9Sstevel@tonic-gate * krb5_kdc_rep_decrypt_proc() 287c478bd9Sstevel@tonic-gate */ 297c478bd9Sstevel@tonic-gate 30*159d09a2SMark Phalan #include "k5-int.h" 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate /* 337c478bd9Sstevel@tonic-gate * Decrypt the encrypted portion of the KDC_REP message, using the key 347c478bd9Sstevel@tonic-gate * passed. 357c478bd9Sstevel@tonic-gate * 367c478bd9Sstevel@tonic-gate */ 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 397c478bd9Sstevel@tonic-gate krb5_error_code 40505d05c7Sgtb krb5_kdc_rep_decrypt_proc(krb5_context context, const krb5_keyblock *key, krb5_const_pointer decryptarg, krb5_kdc_rep *dec_rep) 417c478bd9Sstevel@tonic-gate { 427c478bd9Sstevel@tonic-gate krb5_error_code retval; 437c478bd9Sstevel@tonic-gate krb5_data scratch; 447c478bd9Sstevel@tonic-gate krb5_enc_kdc_rep_part *local_encpart; 457c478bd9Sstevel@tonic-gate krb5_keyusage usage; 467c478bd9Sstevel@tonic-gate 477c478bd9Sstevel@tonic-gate if (decryptarg) { 487c478bd9Sstevel@tonic-gate usage = *(const krb5_keyusage *) decryptarg; 497c478bd9Sstevel@tonic-gate } else { 507c478bd9Sstevel@tonic-gate usage = KRB5_KEYUSAGE_AS_REP_ENCPART; 517c478bd9Sstevel@tonic-gate } 527c478bd9Sstevel@tonic-gate 537c478bd9Sstevel@tonic-gate /* set up scratch decrypt/decode area */ 547c478bd9Sstevel@tonic-gate 557c478bd9Sstevel@tonic-gate scratch.length = dec_rep->enc_part.ciphertext.length; 567c478bd9Sstevel@tonic-gate if (!(scratch.data = malloc(dec_rep->enc_part.ciphertext.length))) { 577c478bd9Sstevel@tonic-gate return(ENOMEM); 587c478bd9Sstevel@tonic-gate } 597c478bd9Sstevel@tonic-gate 60*159d09a2SMark Phalan /*dec_rep->enc_part.enctype;*/ 617c478bd9Sstevel@tonic-gate 62*159d09a2SMark Phalan if ((retval = krb5_c_decrypt(context, key, usage, 0, &dec_rep->enc_part, 63*159d09a2SMark Phalan &scratch))) { 647c478bd9Sstevel@tonic-gate free(scratch.data); 657c478bd9Sstevel@tonic-gate return(retval); 667c478bd9Sstevel@tonic-gate } 677c478bd9Sstevel@tonic-gate 687c478bd9Sstevel@tonic-gate #define clean_scratch() {memset(scratch.data, 0, scratch.length); \ 697c478bd9Sstevel@tonic-gate free(scratch.data);} 707c478bd9Sstevel@tonic-gate 717c478bd9Sstevel@tonic-gate /* and do the decode */ 727c478bd9Sstevel@tonic-gate retval = decode_krb5_enc_kdc_rep_part(&scratch, &local_encpart); 737c478bd9Sstevel@tonic-gate clean_scratch(); 747c478bd9Sstevel@tonic-gate if (retval) 757c478bd9Sstevel@tonic-gate return retval; 767c478bd9Sstevel@tonic-gate 777c478bd9Sstevel@tonic-gate dec_rep->enc_part2 = local_encpart; 787c478bd9Sstevel@tonic-gate 797c478bd9Sstevel@tonic-gate return 0; 807c478bd9Sstevel@tonic-gate } 81