1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * lib/krb5/krb/copy_key.c 8 * 9 * Copyright 1990,1991 by the Massachusetts Institute of Technology. 10 * All Rights Reserved. 11 * 12 * Export of this software from the United States of America may 13 * require a specific license from the United States Government. 14 * It is the responsibility of any person or organization contemplating 15 * export to 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 M.I.T. not be used in advertising or publicity pertaining 23 * to distribution of the software without specific, written prior 24 * permission. Furthermore if you modify this software you must label 25 * your software as modified software and not distribute it in such a 26 * fashion that it might be confused with the original M.I.T. software. 27 * M.I.T. makes no representations about the suitability of 28 * this software for any purpose. It is provided "as is" without express 29 * or implied warranty. 30 * 31 * 32 * krb5_copy_keyblock() 33 */ 34 35 #include "k5-int.h" 36 37 /* 38 * krb5_copy_keyblock_data 39 * 40 * Utility for copying keyblock data structures safely. 41 * This assumes that the necessary storage areas are 42 * already allocated. 43 */ 44 krb5_error_code 45 krb5_copy_keyblock_data(krb5_context context, 46 const krb5_keyblock *from, krb5_keyblock *to) 47 { 48 krb5_error_code ret = 0; 49 50 /* If nothing to copy, return no error */ 51 if (from == NULL || to == NULL) 52 return (0); 53 54 if ((to->contents == NULL || from->contents == NULL) && 55 from->length > 0) 56 return (ENOMEM); 57 58 to->magic = from->magic; 59 to->enctype = from->enctype; 60 to->length = from->length; 61 to->dk_list = NULL; 62 63 if (from->length > 0) 64 (void) memcpy(to->contents, from->contents, from->length); 65 66 #ifdef _KERNEL 67 to->kef_mt = from->kef_mt; 68 to->kef_key.ck_data = NULL; 69 to->key_tmpl = NULL; 70 if ((ret = init_key_kef(context->kef_cipher_mt, to))) { 71 return (ret); 72 } 73 #else 74 /* 75 * Don't copy or try to initialize crypto framework 76 * data. This data gets initialized the first time it is 77 * used. 78 */ 79 to->hKey = CK_INVALID_HANDLE; 80 #endif /* _KERNEL */ 81 return (ret); 82 } 83 84 85 /* 86 * Copy a keyblock, including alloc'ed storage. 87 */ 88 /*ARGSUSED*/ 89 krb5_error_code KRB5_CALLCONV 90 krb5_copy_keyblock(context, from, to) 91 krb5_context context; 92 const krb5_keyblock *from; 93 krb5_keyblock **to; 94 { 95 krb5_keyblock *new_key; 96 krb5_error_code ret = 0; 97 if (!(new_key = (krb5_keyblock *) MALLOC(sizeof(krb5_keyblock)))) 98 return (ENOMEM); 99 100 if (!(new_key->contents = (krb5_octet *)MALLOC(from->length))) { 101 FREE(new_key, sizeof(krb5_keyblock)); 102 return (ENOMEM); 103 } 104 105 ret = krb5_copy_keyblock_data(context, from, new_key); 106 if (ret) { 107 krb5_free_keyblock(context, new_key); 108 return (ret); 109 } 110 111 *to = new_key; 112 return (ret); 113 } 114