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crypto: ccp - fix AES CFB error exposed by new test vectors

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Updated testmgr will exhibit this error message when loading the
ccp-crypto module:

alg: skcipher: cfb-aes-ccp encryption failed with err -22 on test vector 3, cfg="in-place"

Update the CCP crypto driver to correctly treat CFB as a streaming mode
cipher (instead of block mode). Update the configuration for CFB to
specify the block size as a single byte;

Fixes: 2b789435d7 ('crypto: ccp - CCP AES crypto API support')

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Hook, Gary 2019-05-14 21:53:23 +00:00 committed by Herbert Xu
parent 499df9674c
commit c3b359d656
1 changed files with 4 additions and 4 deletions
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8
drivers/crypto/ccp/ccp-crypto-aes.c
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@ -1,7 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
/*
* AMD Cryptographic Coprocessor (CCP) AES crypto API support
*
* Copyright (C) 2013,2016 Advanced Micro Devices, Inc.
* Copyright (C) 2013-2019 Advanced Micro Devices, Inc.
*
* Author: Tom Lendacky <thomas.lendacky@amd.com>
*
@ -79,8 +80,7 @@ static int ccp_aes_crypt(struct ablkcipher_request *req, bool encrypt)
return -EINVAL;
if (((ctx->u.aes.mode == CCP_AES_MODE_ECB) ||
(ctx->u.aes.mode == CCP_AES_MODE_CBC) ||
(ctx->u.aes.mode == CCP_AES_MODE_CFB)) &&
(ctx->u.aes.mode == CCP_AES_MODE_CBC)) &&
(req->nbytes & (AES_BLOCK_SIZE - 1)))
return -EINVAL;
@ -291,7 +291,7 @@ static struct ccp_aes_def aes_algs[] = {
.version = CCP_VERSION(3, 0),
.name = "cfb(aes)",
.driver_name = "cfb-aes-ccp",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.ivsize = AES_BLOCK_SIZE,
.alg_defaults = &ccp_aes_defaults,
},