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| author | Christian Lamparter <chunkeey@gmail.com> | 2018-04-19 18:41:55 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-04-28 16:09:43 +0800 |
| commit | fc340115ffb8235c1bbd200c28855e6373d0dd1a (patch) | |
| tree | 024d0641e73e5eba1df9b589dd78c292200b03ea | |
| parent | 98e87e3d933b8e504ea41b8857c038d2cd06cddc (diff) | |
| download | linux-fc340115ffb8235c1bbd200c28855e6373d0dd1a.tar.gz linux-fc340115ffb8235c1bbd200c28855e6373d0dd1a.tar.bz2 linux-fc340115ffb8235c1bbd200c28855e6373d0dd1a.zip | |
crypto: crypto4xx - properly set IV after de- and encrypt
This patch fixes cts(cbc(aes)) test when cbc-aes-ppc4xx is used.
alg: skcipher: Test 1 failed (invalid result) on encryption for cts(cbc-aes-ppc4xx)
00000000: 4b 10 75 fc 2f 14 1b 6a 27 35 37 33 d1 b7 70 05
00000010: 97
alg: skcipher: Failed to load transform for cts(cbc(aes)): -2
The CTS cipher mode expect the IV (req->iv) of skcipher_request
to contain the last ciphertext block after the {en,de}crypt
operation is complete.
Fix this issue for the AMCC Crypto4xx hardware engine.
The tcrypt test case for cts(cbc(aes)) is now correctly passed.
name : cts(cbc(aes))
driver : cts(cbc-aes-ppc4xx)
module : cts
priority : 300
refcnt : 1
selftest : passed
internal : no
type : skcipher
async : yes
blocksize : 16
min keysize : 16
max keysize : 32
ivsize : 16
chunksize : 16
walksize : 16
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/amcc/crypto4xx_alg.c | 3 | ||||
| -rw-r--r-- | drivers/crypto/amcc/crypto4xx_core.c | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/crypto/amcc/crypto4xx_alg.c b/drivers/crypto/amcc/crypto4xx_alg.c index 8a352ddefd52..5abe86f0b4c6 100644 --- a/drivers/crypto/amcc/crypto4xx_alg.c +++ b/drivers/crypto/amcc/crypto4xx_alg.c @@ -141,7 +141,8 @@ static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher, /* Setup SA */ sa = ctx->sa_in; - set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV, + set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_CBC ? + SA_SAVE_IV : SA_NOT_SAVE_IV), SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, SA_NO_HEADER_PROC, SA_HASH_ALG_NULL, SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, diff --git a/drivers/crypto/amcc/crypto4xx_core.c b/drivers/crypto/amcc/crypto4xx_core.c index 73963928d91b..605398c89ccd 100644 --- a/drivers/crypto/amcc/crypto4xx_core.c +++ b/drivers/crypto/amcc/crypto4xx_core.c @@ -545,6 +545,15 @@ static void crypto4xx_cipher_done(struct crypto4xx_device *dev, addr = dma_map_page(dev->core_dev->device, sg_page(dst), dst->offset, dst->length, DMA_FROM_DEVICE); } + + if (pd_uinfo->sa_va->sa_command_0.bf.save_iv == SA_SAVE_IV) { + struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); + + crypto4xx_memcpy_from_le32((u32 *)req->iv, + pd_uinfo->sr_va->save_iv, + crypto_skcipher_ivsize(skcipher)); + } + crypto4xx_ret_sg_desc(dev, pd_uinfo); if (pd_uinfo->state & PD_ENTRY_BUSY) |