23c57df72989c916b3e98084eb88d48777999691mcpowers * CDDL HEADER START
23c57df72989c916b3e98084eb88d48777999691mcpowers * The contents of this file are subject to the terms of the
23c57df72989c916b3e98084eb88d48777999691mcpowers * Common Development and Distribution License (the "License").
23c57df72989c916b3e98084eb88d48777999691mcpowers * You may not use this file except in compliance with the License.
23c57df72989c916b3e98084eb88d48777999691mcpowers * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
23c57df72989c916b3e98084eb88d48777999691mcpowers * See the License for the specific language governing permissions
23c57df72989c916b3e98084eb88d48777999691mcpowers * and limitations under the License.
23c57df72989c916b3e98084eb88d48777999691mcpowers * When distributing Covered Code, include this CDDL HEADER in each
23c57df72989c916b3e98084eb88d48777999691mcpowers * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
23c57df72989c916b3e98084eb88d48777999691mcpowers * If applicable, add the following below this CDDL HEADER, with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * fields enclosed by brackets "[]" replaced with your own identifying
23c57df72989c916b3e98084eb88d48777999691mcpowers * information: Portions Copyright [yyyy] [name of copyright owner]
23c57df72989c916b3e98084eb88d48777999691mcpowers * CDDL HEADER END
23c57df72989c916b3e98084eb88d48777999691mcpowers * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23c57df72989c916b3e98084eb88d48777999691mcpowers * Use is subject to license terms.
23c57df72989c916b3e98084eb88d48777999691mcpowers * Algorithm independent CBC functions.
23c57df72989c916b3e98084eb88d48777999691mcpowerscbc_encrypt_contiguous_blocks(cbc_ctx_t *ctx, char *data, size_t length,
23c57df72989c916b3e98084eb88d48777999691mcpowers int (*encrypt)(const void *, const uint8_t *, uint8_t *),
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (length + ctx->cbc_remainder_len < block_size) {
23c57df72989c916b3e98084eb88d48777999691mcpowers /* accumulate bytes here and return */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (uint8_t *)ctx->cbc_remainder + ctx->cbc_remainder_len,
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Unprocessed data from last call. */
23c57df72989c916b3e98084eb88d48777999691mcpowers * XOR the previous cipher block or IV with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * current clear block.
23c57df72989c916b3e98084eb88d48777999691mcpowers * XOR the previous cipher block or IV with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * current clear block.
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_get_ptrs(out, &iov_or_mp, &offset, &out_data_1,
23c57df72989c916b3e98084eb88d48777999691mcpowers /* copy block to where it belongs */
23c57df72989c916b3e98084eb88d48777999691mcpowers /* update offset */
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Update pointer to next block of data to be processed. */
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Incomplete last block. */
23c57df72989c916b3e98084eb88d48777999691mcpowers } while (remainder > 0);
23c57df72989c916b3e98084eb88d48777999691mcpowers * Save the last encrypted block in the context.
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers copy_block((uint8_t *)ctx->cbc_lastp, (uint8_t *)ctx->cbc_iv);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (((a) == (ctx)->cbc_lastblock) ? (ctx)->cbc_iv : (ctx)->cbc_lastblock)
23c57df72989c916b3e98084eb88d48777999691mcpowers/* ARGSUSED */
23c57df72989c916b3e98084eb88d48777999691mcpowerscbc_decrypt_contiguous_blocks(cbc_ctx_t *ctx, char *data, size_t length,
23c57df72989c916b3e98084eb88d48777999691mcpowers int (*decrypt)(const void *, const uint8_t *, uint8_t *),
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (length + ctx->cbc_remainder_len < block_size) {
23c57df72989c916b3e98084eb88d48777999691mcpowers /* accumulate bytes here and return */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (uint8_t *)ctx->cbc_remainder + ctx->cbc_remainder_len,
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Unprocessed data from last call. */
23c57df72989c916b3e98084eb88d48777999691mcpowers /* LINTED: pointer alignment */
23c57df72989c916b3e98084eb88d48777999691mcpowers copy_block(blockp, (uint8_t *)OTHER((uint64_t *)lastp, ctx));
23c57df72989c916b3e98084eb88d48777999691mcpowers * XOR the previous cipher block or IV with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * currently decrypted block.
23c57df72989c916b3e98084eb88d48777999691mcpowers /* LINTED: pointer alignment */
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_get_ptrs(out, &iov_or_mp, &offset, &out_data_1,
23c57df72989c916b3e98084eb88d48777999691mcpowers /* update offset */
23c57df72989c916b3e98084eb88d48777999691mcpowers /* copy temporary block to where it belongs */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(blockp, ctx->cbc_copy_to, ctx->cbc_remainder_len);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(blockp + ctx->cbc_remainder_len, datap, need);
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Update pointer to next block of data to be processed. */
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Incomplete last block. */
23c57df72989c916b3e98084eb88d48777999691mcpowers } while (remainder > 0);
23c57df72989c916b3e98084eb88d48777999691mcpowerscbc_init_ctx(cbc_ctx_t *cbc_ctx, char *param, size_t param_len,
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t block_size, void (*copy_block)(uint8_t *, uint64_t *))
23c57df72989c916b3e98084eb88d48777999691mcpowers * Copy IV into context.
23c57df72989c916b3e98084eb88d48777999691mcpowers * If cm_param == NULL then the IV comes from the
23c57df72989c916b3e98084eb88d48777999691mcpowers * cd_miscdata field in the crypto_data structure.
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers cbc_ctx->cbc_lastp = (uint8_t *)&cbc_ctx->cbc_iv[0];
23c57df72989c916b3e98084eb88d48777999691mcpowers/* ARGSUSED */
23c57df72989c916b3e98084eb88d48777999691mcpowers if ((cbc_ctx = kmem_zalloc(sizeof (cbc_ctx_t), kmflag)) == NULL)