1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * Copyright (C) 1998 by the FundsXpress, INC. 9 * 10 * All rights reserved. 11 * 12 * Export of this software from the United States of America may require 13 * a specific license from the United States Government. It is the 14 * responsibility of any person or organization contemplating export to 15 * obtain such a license before exporting. 16 * 17 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 18 * distribute this software and its documentation for any purpose and 19 * without fee is hereby granted, provided that the above copyright 20 * notice appear in all copies and that both that copyright notice and 21 * this permission notice appear in supporting documentation, and that 22 * the name of FundsXpress. not be used in advertising or publicity pertaining 23 * to distribution of the software without specific, written prior 24 * permission. FundsXpress makes no representations about the suitability of 25 * this software for any purpose. It is provided "as is" without express 26 * or implied warranty. 27 * 28 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 29 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 30 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 31 */ 32 33 #include "dk.h" 34 35 static const unsigned char kerberos[] = "kerberos"; 36 #define kerberos_len (sizeof(kerberos)-1) 37 38 krb5_error_code 39 krb5int_dk_string_to_key( 40 krb5_context context, 41 const struct krb5_enc_provider *enc, 42 const krb5_data *string, const krb5_data *salt, 43 const krb5_data *parms, krb5_keyblock *key) 44 { 45 krb5_error_code ret; 46 size_t keybytes, keylength, concatlen; 47 unsigned char *concat, *foldstring, *foldkeydata; 48 krb5_data indata; 49 krb5_keyblock foldkey; 50 51 /* key->length is checked by krb5_derive_key */ 52 53 keybytes = enc->keybytes; 54 keylength = enc->keylength; 55 56 concatlen = string->length+(salt?salt->length:0); 57 58 if ((concat = (unsigned char *) malloc(concatlen)) == NULL) 59 return(ENOMEM); 60 if ((foldstring = (unsigned char *) malloc(keybytes)) == NULL) { 61 free(concat); 62 return(ENOMEM); 63 } 64 if ((foldkeydata = (unsigned char *) malloc(keylength)) == NULL) { 65 free(foldstring); 66 free(concat); 67 return(ENOMEM); 68 } 69 70 /* construct input string ( = string + salt), fold it, make_key it */ 71 72 memcpy(concat, string->data, string->length); 73 if (salt) 74 memcpy(concat+string->length, salt->data, salt->length); 75 76 krb5_nfold(concatlen*8, concat, keybytes*8, foldstring); 77 78 indata.length = keybytes; 79 indata.data = (char *) foldstring; 80 81 /* Solaris Kerberos */ 82 memset(&foldkey, 0, sizeof (krb5_keyblock)); 83 foldkey.enctype = key->enctype; 84 foldkey.length = keylength; 85 foldkey.contents = foldkeydata; 86 87 /* Solaris Kerberos */ 88 (*(enc->make_key))(context, &indata, &foldkey); 89 90 /* now derive the key from this one */ 91 92 indata.length = kerberos_len; 93 indata.data = (char *) kerberos; 94 /* Solaris Kerberos */ 95 if ((ret = krb5_derive_key(context, enc, &foldkey, key, &indata))) 96 (void) memset(key->contents, 0, key->length); 97 98 /* ret is set correctly by the prior call */ 99 100 memset(concat, 0, concatlen); 101 memset(foldstring, 0, keybytes); 102 memset(foldkeydata, 0, keylength); 103 104 free(foldkeydata); 105 free(foldstring); 106 free(concat); 107 108 return(ret); 109 } 110