64d85cc999
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation version 2 only this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 15 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141902.274594435@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/**
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* AES CBC routines supporting the Power 7+ Nest Accelerators driver
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*
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* Copyright (C) 2011-2012 International Business Machines Inc.
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*
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* Author: Kent Yoder <yoder1@us.ibm.com>
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*/
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#include <crypto/aes.h>
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#include <crypto/algapi.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/crypto.h>
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#include <asm/vio.h>
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#include "nx_csbcpb.h"
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#include "nx.h"
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static int cbc_aes_nx_set_key(struct crypto_tfm *tfm,
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const u8 *in_key,
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unsigned int key_len)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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nx_ctx_init(nx_ctx, HCOP_FC_AES);
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switch (key_len) {
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case AES_KEYSIZE_128:
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
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break;
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case AES_KEYSIZE_192:
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
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break;
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case AES_KEYSIZE_256:
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
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break;
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default:
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return -EINVAL;
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}
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csbcpb->cpb.hdr.mode = NX_MODE_AES_CBC;
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memcpy(csbcpb->cpb.aes_cbc.key, in_key, key_len);
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return 0;
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}
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static int cbc_aes_nx_crypt(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src,
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unsigned int nbytes,
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int enc)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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unsigned long irq_flags;
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unsigned int processed = 0, to_process;
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int rc;
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spin_lock_irqsave(&nx_ctx->lock, irq_flags);
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if (enc)
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NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
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else
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NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
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do {
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to_process = nbytes - processed;
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rc = nx_build_sg_lists(nx_ctx, desc, dst, src, &to_process,
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processed, csbcpb->cpb.aes_cbc.iv);
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if (rc)
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goto out;
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if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
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rc = -EINVAL;
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goto out;
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}
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rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
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desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
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if (rc)
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goto out;
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memcpy(desc->info, csbcpb->cpb.aes_cbc.cv, AES_BLOCK_SIZE);
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atomic_inc(&(nx_ctx->stats->aes_ops));
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atomic64_add(csbcpb->csb.processed_byte_count,
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&(nx_ctx->stats->aes_bytes));
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processed += to_process;
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} while (processed < nbytes);
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out:
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spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
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return rc;
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}
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static int cbc_aes_nx_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src,
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unsigned int nbytes)
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{
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return cbc_aes_nx_crypt(desc, dst, src, nbytes, 1);
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}
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static int cbc_aes_nx_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src,
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unsigned int nbytes)
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{
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return cbc_aes_nx_crypt(desc, dst, src, nbytes, 0);
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}
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struct crypto_alg nx_cbc_aes_alg = {
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.cra_name = "cbc(aes)",
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.cra_driver_name = "cbc-aes-nx",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct nx_crypto_ctx),
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.cra_type = &crypto_blkcipher_type,
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.cra_alignmask = 0xf,
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.cra_module = THIS_MODULE,
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.cra_init = nx_crypto_ctx_aes_cbc_init,
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.cra_exit = nx_crypto_ctx_exit,
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.cra_blkcipher = {
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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.setkey = cbc_aes_nx_set_key,
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.encrypt = cbc_aes_nx_encrypt,
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.decrypt = cbc_aes_nx_decrypt,
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}
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};
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