23c57df72989c916b3e98084eb88d48777999691mcpowers/*
23c57df72989c916b3e98084eb88d48777999691mcpowers * CDDL HEADER START
23c57df72989c916b3e98084eb88d48777999691mcpowers *
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 *
23c57df72989c916b3e98084eb88d48777999691mcpowers * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
23c57df72989c916b3e98084eb88d48777999691mcpowers * or http://www.opensolaris.org/os/licensing.
23c57df72989c916b3e98084eb88d48777999691mcpowers * See the License for the specific language governing permissions
23c57df72989c916b3e98084eb88d48777999691mcpowers * and limitations under the License.
23c57df72989c916b3e98084eb88d48777999691mcpowers *
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 *
23c57df72989c916b3e98084eb88d48777999691mcpowers * CDDL HEADER END
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowers/*
23c57df72989c916b3e98084eb88d48777999691mcpowers * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23c57df72989c916b3e98084eb88d48777999691mcpowers * Use is subject to license terms.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers#ifndef _KERNEL
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <strings.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <limits.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <assert.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <security/cryptoki.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#endif
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <sys/types.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <modes/modes.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <sys/crypto/common.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers#include <sys/crypto/impl.h>
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers/*
23c57df72989c916b3e98084eb88d48777999691mcpowers * Algorithm independent CBC functions.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowersint
23c57df72989c916b3e98084eb88d48777999691mcpowerscbc_encrypt_contiguous_blocks(cbc_ctx_t *ctx, char *data, size_t length,
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_data_t *out, size_t block_size,
23c57df72989c916b3e98084eb88d48777999691mcpowers int (*encrypt)(const void *, const uint8_t *, uint8_t *),
23c57df72989c916b3e98084eb88d48777999691mcpowers void (*copy_block)(uint8_t *, uint8_t *),
23c57df72989c916b3e98084eb88d48777999691mcpowers void (*xor_block)(uint8_t *, uint8_t *))
23c57df72989c916b3e98084eb88d48777999691mcpowers{
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t remainder = length;
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t need;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *datap = (uint8_t *)data;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *blockp;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *lastp;
23c57df72989c916b3e98084eb88d48777999691mcpowers void *iov_or_mp;
23c57df72989c916b3e98084eb88d48777999691mcpowers offset_t offset;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *out_data_1;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *out_data_2;
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t out_data_1_len;
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (length + ctx->cbc_remainder_len < block_size) {
23c57df72989c916b3e98084eb88d48777999691mcpowers /* accumulate bytes here and return */
23c57df72989c916b3e98084eb88d48777999691mcpowers bcopy(datap,
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (uint8_t *)ctx->cbc_remainder + ctx->cbc_remainder_len,
23c57df72989c916b3e98084eb88d48777999691mcpowers length);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len += length;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_copy_to = datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_SUCCESS);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers lastp = (uint8_t *)ctx->cbc_iv;
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out != NULL)
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_init_ptrs(out, &iov_or_mp, &offset);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers do {
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Unprocessed data from last call. */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (ctx->cbc_remainder_len > 0) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers need = block_size - ctx->cbc_remainder_len;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers if (need > remainder)
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_DATA_LEN_RANGE);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(datap, &((uint8_t *)ctx->cbc_remainder)
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers [ctx->cbc_remainder_len], need);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers blockp = (uint8_t *)ctx->cbc_remainder;
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
23c57df72989c916b3e98084eb88d48777999691mcpowers blockp = datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out == NULL) {
23c57df72989c916b3e98084eb88d48777999691mcpowers /*
23c57df72989c916b3e98084eb88d48777999691mcpowers * XOR the previous cipher block or IV with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * current clear block.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowers xor_block(lastp, blockp);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers encrypt(ctx->cbc_keysched, blockp, blockp);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_lastp = blockp;
23c57df72989c916b3e98084eb88d48777999691mcpowers lastp = blockp;
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (ctx->cbc_remainder_len > 0) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(blockp, ctx->cbc_copy_to,
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(blockp + ctx->cbc_remainder_len, datap,
23c57df72989c916b3e98084eb88d48777999691mcpowers need);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
23c57df72989c916b3e98084eb88d48777999691mcpowers /*
23c57df72989c916b3e98084eb88d48777999691mcpowers * XOR the previous cipher block or IV with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * current clear block.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowers xor_block(blockp, lastp);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers encrypt(ctx->cbc_keysched, lastp, lastp);
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_get_ptrs(out, &iov_or_mp, &offset, &out_data_1,
23c57df72989c916b3e98084eb88d48777999691mcpowers &out_data_1_len, &out_data_2, block_size);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* copy block to where it belongs */
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out_data_1_len == block_size) {
23c57df72989c916b3e98084eb88d48777999691mcpowers copy_block(lastp, out_data_1);
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
23c57df72989c916b3e98084eb88d48777999691mcpowers bcopy(lastp, out_data_1, out_data_1_len);
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out_data_2 != NULL) {
23c57df72989c916b3e98084eb88d48777999691mcpowers bcopy(lastp + out_data_1_len,
23c57df72989c916b3e98084eb88d48777999691mcpowers out_data_2,
23c57df72989c916b3e98084eb88d48777999691mcpowers block_size - out_data_1_len);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers /* update offset */
23c57df72989c916b3e98084eb88d48777999691mcpowers out->cd_offset += block_size;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Update pointer to next block of data to be processed. */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (ctx->cbc_remainder_len != 0) {
23c57df72989c916b3e98084eb88d48777999691mcpowers datap += need;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len = 0;
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
23c57df72989c916b3e98084eb88d48777999691mcpowers datap += block_size;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers remainder = (size_t)&data[length] - (size_t)datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Incomplete last block. */
23c57df72989c916b3e98084eb88d48777999691mcpowers if (remainder > 0 && remainder < block_size) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(datap, ctx->cbc_remainder, remainder);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len = remainder;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_copy_to = datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers goto out;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_copy_to = NULL;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers } while (remainder > 0);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowersout:
23c57df72989c916b3e98084eb88d48777999691mcpowers /*
23c57df72989c916b3e98084eb88d48777999691mcpowers * Save the last encrypted block in the context.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (ctx->cbc_lastp != NULL) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers copy_block((uint8_t *)ctx->cbc_lastp, (uint8_t *)ctx->cbc_iv);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_lastp = (uint8_t *)ctx->cbc_iv;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_SUCCESS);
23c57df72989c916b3e98084eb88d48777999691mcpowers}
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers#define OTHER(a, ctx) \
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (((a) == (ctx)->cbc_lastblock) ? (ctx)->cbc_iv : (ctx)->cbc_lastblock)
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers/* ARGSUSED */
23c57df72989c916b3e98084eb88d48777999691mcpowersint
23c57df72989c916b3e98084eb88d48777999691mcpowerscbc_decrypt_contiguous_blocks(cbc_ctx_t *ctx, char *data, size_t length,
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_data_t *out, size_t block_size,
23c57df72989c916b3e98084eb88d48777999691mcpowers int (*decrypt)(const void *, const uint8_t *, uint8_t *),
23c57df72989c916b3e98084eb88d48777999691mcpowers void (*copy_block)(uint8_t *, uint8_t *),
23c57df72989c916b3e98084eb88d48777999691mcpowers void (*xor_block)(uint8_t *, uint8_t *))
23c57df72989c916b3e98084eb88d48777999691mcpowers{
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t remainder = length;
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t need;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *datap = (uint8_t *)data;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *blockp;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *lastp;
23c57df72989c916b3e98084eb88d48777999691mcpowers void *iov_or_mp;
23c57df72989c916b3e98084eb88d48777999691mcpowers offset_t offset;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *out_data_1;
23c57df72989c916b3e98084eb88d48777999691mcpowers uint8_t *out_data_2;
23c57df72989c916b3e98084eb88d48777999691mcpowers size_t out_data_1_len;
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (length + ctx->cbc_remainder_len < block_size) {
23c57df72989c916b3e98084eb88d48777999691mcpowers /* accumulate bytes here and return */
23c57df72989c916b3e98084eb88d48777999691mcpowers bcopy(datap,
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (uint8_t *)ctx->cbc_remainder + ctx->cbc_remainder_len,
23c57df72989c916b3e98084eb88d48777999691mcpowers length);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len += length;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_copy_to = datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_SUCCESS);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers lastp = ctx->cbc_lastp;
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out != NULL)
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_init_ptrs(out, &iov_or_mp, &offset);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers do {
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Unprocessed data from last call. */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (ctx->cbc_remainder_len > 0) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers need = block_size - ctx->cbc_remainder_len;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers if (need > remainder)
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_ENCRYPTED_DATA_LEN_RANGE);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(datap, &((uint8_t *)ctx->cbc_remainder)
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers [ctx->cbc_remainder_len], need);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers blockp = (uint8_t *)ctx->cbc_remainder;
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
23c57df72989c916b3e98084eb88d48777999691mcpowers blockp = datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* LINTED: pointer alignment */
23c57df72989c916b3e98084eb88d48777999691mcpowers copy_block(blockp, (uint8_t *)OTHER((uint64_t *)lastp, ctx));
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out != NULL) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers decrypt(ctx->cbc_keysched, blockp,
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers (uint8_t *)ctx->cbc_remainder);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers blockp = (uint8_t *)ctx->cbc_remainder;
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers decrypt(ctx->cbc_keysched, blockp, blockp);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /*
23c57df72989c916b3e98084eb88d48777999691mcpowers * XOR the previous cipher block or IV with the
23c57df72989c916b3e98084eb88d48777999691mcpowers * currently decrypted block.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowers xor_block(lastp, blockp);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* LINTED: pointer alignment */
23c57df72989c916b3e98084eb88d48777999691mcpowers lastp = (uint8_t *)OTHER((uint64_t *)lastp, ctx);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out != NULL) {
23c57df72989c916b3e98084eb88d48777999691mcpowers crypto_get_ptrs(out, &iov_or_mp, &offset, &out_data_1,
23c57df72989c916b3e98084eb88d48777999691mcpowers &out_data_1_len, &out_data_2, block_size);
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers bcopy(blockp, out_data_1, out_data_1_len);
23c57df72989c916b3e98084eb88d48777999691mcpowers if (out_data_2 != NULL) {
23c57df72989c916b3e98084eb88d48777999691mcpowers bcopy(blockp + out_data_1_len, out_data_2,
23c57df72989c916b3e98084eb88d48777999691mcpowers block_size - out_data_1_len);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* update offset */
23c57df72989c916b3e98084eb88d48777999691mcpowers out->cd_offset += block_size;
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers } else if (ctx->cbc_remainder_len > 0) {
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 }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Update pointer to next block of data to be processed. */
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers if (ctx->cbc_remainder_len != 0) {
23c57df72989c916b3e98084eb88d48777999691mcpowers datap += need;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len = 0;
23c57df72989c916b3e98084eb88d48777999691mcpowers } else {
23c57df72989c916b3e98084eb88d48777999691mcpowers datap += block_size;
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers remainder = (size_t)&data[length] - (size_t)datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers /* Incomplete last block. */
23c57df72989c916b3e98084eb88d48777999691mcpowers if (remainder > 0 && remainder < block_size) {
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers bcopy(datap, ctx->cbc_remainder, remainder);
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_remainder_len = remainder;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_lastp = lastp;
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_copy_to = datap;
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_SUCCESS);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_copy_to = NULL;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers } while (remainder > 0);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers ctx->cbc_lastp = lastp;
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_SUCCESS);
23c57df72989c916b3e98084eb88d48777999691mcpowers}
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowersint
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{
23c57df72989c916b3e98084eb88d48777999691mcpowers /*
23c57df72989c916b3e98084eb88d48777999691mcpowers * Copy IV into context.
23c57df72989c916b3e98084eb88d48777999691mcpowers *
23c57df72989c916b3e98084eb88d48777999691mcpowers * If cm_param == NULL then the IV comes from the
23c57df72989c916b3e98084eb88d48777999691mcpowers * cd_miscdata field in the crypto_data structure.
23c57df72989c916b3e98084eb88d48777999691mcpowers */
23c57df72989c916b3e98084eb88d48777999691mcpowers if (param != NULL) {
23c57df72989c916b3e98084eb88d48777999691mcpowers#ifdef _KERNEL
23c57df72989c916b3e98084eb88d48777999691mcpowers ASSERT(param_len == block_size);
23c57df72989c916b3e98084eb88d48777999691mcpowers#else
23c57df72989c916b3e98084eb88d48777999691mcpowers assert(param_len == block_size);
23c57df72989c916b3e98084eb88d48777999691mcpowers#endif
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers copy_block((uchar_t *)param, cbc_ctx->cbc_iv);
23c57df72989c916b3e98084eb88d48777999691mcpowers }
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers cbc_ctx->cbc_lastp = (uint8_t *)&cbc_ctx->cbc_iv[0];
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers cbc_ctx->cbc_flags |= CBC_MODE;
23c57df72989c916b3e98084eb88d48777999691mcpowers return (CRYPTO_SUCCESS);
23c57df72989c916b3e98084eb88d48777999691mcpowers}
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers/* ARGSUSED */
23c57df72989c916b3e98084eb88d48777999691mcpowersvoid *
23c57df72989c916b3e98084eb88d48777999691mcpowerscbc_alloc_ctx(int kmflag)
23c57df72989c916b3e98084eb88d48777999691mcpowers{
23c57df72989c916b3e98084eb88d48777999691mcpowers cbc_ctx_t *cbc_ctx;
23c57df72989c916b3e98084eb88d48777999691mcpowers
23c57df72989c916b3e98084eb88d48777999691mcpowers#ifdef _KERNEL
23c57df72989c916b3e98084eb88d48777999691mcpowers if ((cbc_ctx = kmem_zalloc(sizeof (cbc_ctx_t), kmflag)) == NULL)
23c57df72989c916b3e98084eb88d48777999691mcpowers#else
23c57df72989c916b3e98084eb88d48777999691mcpowers if ((cbc_ctx = calloc(1, sizeof (cbc_ctx_t))) == NULL)
23c57df72989c916b3e98084eb88d48777999691mcpowers#endif
23c57df72989c916b3e98084eb88d48777999691mcpowers return (NULL);
23c57df72989c916b3e98084eb88d48777999691mcpowers
16239bc82c111618343e0a5b1a70e0fc702d00e0Mark Powers cbc_ctx->cbc_flags = CBC_MODE;
23c57df72989c916b3e98084eb88d48777999691mcpowers return (cbc_ctx);
23c57df72989c916b3e98084eb88d48777999691mcpowers}