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// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/zfs_context.h>
#include <modes/modes.h>
#include <aes/aes_impl.h>
/* Copy a 16-byte AES block from "in" to "out" */
void
aes_copy_block(uint8_t *in, uint8_t *out)
{
if (IS_P2ALIGNED2(in, out, sizeof (uint32_t))) {
/* LINTED: pointer alignment */
*(uint32_t *)&out[0] = *(uint32_t *)&in[0];
/* LINTED: pointer alignment */
*(uint32_t *)&out[4] = *(uint32_t *)&in[4];
/* LINTED: pointer alignment */
*(uint32_t *)&out[8] = *(uint32_t *)&in[8];
/* LINTED: pointer alignment */
*(uint32_t *)&out[12] = *(uint32_t *)&in[12];
} else {
AES_COPY_BLOCK(in, out);
}
}
/* XOR a 16-byte AES block of data into dst */
void
aes_xor_block(uint8_t *data, uint8_t *dst)
{
if (IS_P2ALIGNED2(dst, data, sizeof (uint32_t))) {
/* LINTED: pointer alignment */
*(uint32_t *)&dst[0] ^= *(uint32_t *)&data[0];
/* LINTED: pointer alignment */
*(uint32_t *)&dst[4] ^= *(uint32_t *)&data[4];
/* LINTED: pointer alignment */
*(uint32_t *)&dst[8] ^= *(uint32_t *)&data[8];
/* LINTED: pointer alignment */
*(uint32_t *)&dst[12] ^= *(uint32_t *)&data[12];
} else {
AES_XOR_BLOCK(data, dst);
}
}
/*
* Encrypt multiple blocks of data according to mode.
*/
int
aes_encrypt_contiguous_blocks(void *ctx, char *data, size_t length,
crypto_data_t *out)
{
aes_ctx_t *aes_ctx = ctx;
int rv;
if (aes_ctx->ac_flags & CCM_MODE) {
rv = ccm_mode_encrypt_contiguous_blocks(ctx, data, length,
out, AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block,
aes_xor_block);
} else if (aes_ctx->ac_flags & GCM_MODE) {
rv = gcm_mode_encrypt_contiguous_blocks(ctx, data, length,
out, AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block,
aes_xor_block);
}
else
__builtin_unreachable();
return (rv);
}
/*
* Decrypt multiple blocks of data according to mode.
*/
int
aes_decrypt_contiguous_blocks(void *ctx, char *data, size_t length,
crypto_data_t *out)
{
aes_ctx_t *aes_ctx = ctx;
int rv;
if (aes_ctx->ac_flags & CCM_MODE) {
rv = ccm_mode_decrypt_contiguous_blocks(ctx, data, length,
out, AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block,
aes_xor_block);
} else if (aes_ctx->ac_flags & GCM_MODE) {
rv = gcm_mode_decrypt_contiguous_blocks(ctx, data, length,
out, AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block,
aes_xor_block);
} else
__builtin_unreachable();
return (rv);
}
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