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Subject[PATCH 4.19 177/271] crypto: crypto4xx - fix AES CTR blocksize value
Date
From: Christian Lamparter <chunkeey@gmail.com>

commit bfa2ba7d9e6b20aca82b99e6842fe18842ae3a0f upstream.

This patch fixes a issue with crypto4xx's ctr(aes) that was
discovered by libcapi's kcapi-enc-test.sh test.

The some of the ctr(aes) encryptions test were failing on the
non-power-of-two test:

kcapi-enc - Error: encryption failed with error 0
kcapi-enc - Error: decryption failed with error 0
[FAILED: 32-bit - 5.1.0-rc1+] 15 bytes: STDIN / STDOUT enc test (128 bits):
original file (1d100e..cc96184c) and generated file (e3b0c442..1b7852b855)
[FAILED: 32-bit - 5.1.0-rc1+] 15 bytes: STDIN / STDOUT enc test (128 bits)
(openssl generated CT): original file (e3b0..5) and generated file (3..8e)
[PASSED: 32-bit - 5.1.0-rc1+] 15 bytes: STDIN / STDOUT enc test (128 bits)
(openssl generated PT)
[FAILED: 32-bit - 5.1.0-rc1+] 15 bytes: STDIN / STDOUT enc test (password):
original file (1d1..84c) and generated file (e3b..852b855)

But the 16, 32, 512, 65536 tests always worked.

Thankfully, this isn't a hidden hardware problem like previously,
instead this turned out to be a copy and paste issue.

With this patch, all the tests are passing with and
kcapi-enc-test.sh gives crypto4xx's a clean bill of health:
"Number of failures: 0" :).

Cc: stable@vger.kernel.org
Fixes: 98e87e3d933b ("crypto: crypto4xx - add aes-ctr support")
Fixes: f2a13e7cba9e ("crypto: crypto4xx - enable AES RFC3686, ECB, CFB and OFB offloads")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/crypto/amcc/crypto4xx_core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/crypto/amcc/crypto4xx_core.c
+++ b/drivers/crypto/amcc/crypto4xx_core.c
@@ -1186,7 +1186,7 @@ static struct crypto4xx_alg_common crypt
.cra_flags = CRYPTO_ALG_NEED_FALLBACK |
CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
- .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_blocksize = 1,
.cra_ctxsize = sizeof(struct crypto4xx_ctx),
.cra_module = THIS_MODULE,
},
@@ -1206,7 +1206,7 @@ static struct crypto4xx_alg_common crypt
.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
- .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_blocksize = 1,
.cra_ctxsize = sizeof(struct crypto4xx_ctx),
.cra_module = THIS_MODULE,
},

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