1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 /*
  26  * Copyright 2015 by Saso Kiselkov. All rights reserved.
  27  */
  28 
  29 #ifndef _KERNEL
  30 #include <stdlib.h>
  31 #endif
  32 
  33 #include <sys/strsun.h>
  34 #include <sys/types.h>
  35 #include <modes/modes.h>
  36 #include <sys/crypto/common.h>
  37 #include <sys/crypto/impl.h>
  38 
  39 /*
  40  * Initialize by setting iov_or_mp to point to the current iovec or mp,
  41  * and by setting current_offset to an offset within the current iovec or mp.
  42  */
  43 void
  44 crypto_init_ptrs(crypto_data_t *out, void **iov_or_mp, offset_t *current_offset)
  45 {
  46         offset_t offset;
  47 
  48         switch (out->cd_format) {
  49         case CRYPTO_DATA_RAW:
  50                 *current_offset = out->cd_offset;
  51                 break;
  52 
  53         case CRYPTO_DATA_UIO: {
  54                 uio_t *uiop = out->cd_uio;
  55                 uintptr_t vec_idx;
  56 
  57                 offset = out->cd_offset;
  58                 for (vec_idx = 0; vec_idx < uiop->uio_iovcnt &&
  59                     offset >= uiop->uio_iov[vec_idx].iov_len;
  60                     offset -= uiop->uio_iov[vec_idx++].iov_len)
  61                         ;
  62 
  63                 *current_offset = offset;
  64                 *iov_or_mp = (void *)vec_idx;
  65                 break;
  66         }
  67 
  68         case CRYPTO_DATA_MBLK: {
  69                 mblk_t *mp;
  70 
  71                 offset = out->cd_offset;
  72                 for (mp = out->cd_mp; mp != NULL && offset >= MBLKL(mp);
  73                     offset -= MBLKL(mp), mp = mp->b_cont)
  74                         ;
  75 
  76                 *current_offset = offset;
  77                 *iov_or_mp = mp;
  78                 break;
  79 
  80         }
  81         } /* end switch */
  82 }
  83 
  84 void
  85 crypto_free_mode_ctx(void *ctx)
  86 {
  87         common_ctx_t *common_ctx = (common_ctx_t *)ctx;
  88 
  89         switch (common_ctx->cc_flags &
  90             (ECB_MODE|CBC_MODE|CTR_MODE|CCM_MODE|GCM_MODE|GMAC_MODE)) {
  91         case ECB_MODE:
  92 #ifdef _KERNEL
  93                 kmem_free(common_ctx, sizeof (ecb_ctx_t));
  94 #else
  95                 free(common_ctx);
  96 #endif
  97                 break;
  98 
  99         case CBC_MODE:
 100 #ifdef _KERNEL
 101                 kmem_free(common_ctx, sizeof (cbc_ctx_t));
 102 #else
 103                 free(common_ctx);
 104 #endif
 105                 break;
 106 
 107         case CTR_MODE:
 108 #ifdef _KERNEL
 109                 kmem_free(common_ctx, sizeof (ctr_ctx_t));
 110 #else
 111                 free(common_ctx);
 112 #endif
 113                 break;
 114 
 115         case CCM_MODE:
 116 #ifdef _KERNEL
 117                 if (((ccm_ctx_t *)ctx)->ccm_pt_buf != NULL)
 118                         kmem_free(((ccm_ctx_t *)ctx)->ccm_pt_buf,
 119                             ((ccm_ctx_t *)ctx)->ccm_data_len);
 120 
 121                 kmem_free(ctx, sizeof (ccm_ctx_t));
 122 #else
 123                 if (((ccm_ctx_t *)ctx)->ccm_pt_buf != NULL)
 124                         free(((ccm_ctx_t *)ctx)->ccm_pt_buf);
 125                 free(ctx);
 126 #endif
 127                 break;
 128 
 129         case GCM_MODE:
 130         case GMAC_MODE:
 131 #ifdef _KERNEL
 132                 kmem_free(ctx, sizeof (gcm_ctx_t));
 133 #else
 134                 free(ctx);
 135 #endif
 136         }
 137 }