osfmk/corecrypto/ccmode/src/ccmode_ctr_init.c

   1 /*
   2  *  ccmode_ctr_init.c
   3  *  corecrypto
   4  *
   5  *  Created on 12/17/2010
   6  *
   7  *  Copyright (c) 2010,2011,2012,2014,2015 Apple Inc. All rights reserved.
   8  *
   9  *
  10  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  11  *
  12  * This file contains Original Code and/or Modifications of Original Code
  13  * as defined in and that are subject to the Apple Public Source License
  14  * Version 2.0 (the 'License'). You may not use this file except in
  15  * compliance with the License. The rights granted to you under the License
  16  * may not be used to create, or enable the creation or redistribution of,
  17  * unlawful or unlicensed copies of an Apple operating system, or to
  18  * circumvent, violate, or enable the circumvention or violation of, any
  19  * terms of an Apple operating system software license agreement.
  20  *
  21  * Please obtain a copy of the License at
  22  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  23  *
  24  * The Original Code and all software distributed under the License are
  25  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  26  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  27  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  28  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  29  * Please see the License for the specific language governing rights and
  30  * limitations under the License.
  31  *
  32  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  33  */
  34
  35 #include "ccmode_internal.h"
  36
  37 int ccmode_ctr_init(const struct ccmode_ctr *ctr, ccctr_ctx *key,
  38                     size_t rawkey_len, const void *rawkey,
  39                     const void *iv) {
  40     int rc;
  41     const struct ccmode_ecb *ecb = ctr->custom;
  42     CCMODE_CTR_KEY_ECB(key) = ecb;
  43
  44     rc = ecb->init(ecb, CCMODE_CTR_KEY_ECB_KEY(key), rawkey_len, rawkey);
  45
  46     ccctr_setctr(ctr, key, iv);
  47
  48     return rc;
  49 }