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