LinuxLists.cc - [PATCH] crypto: s390 des3 - permit weak keys unless REQ_WEAK

2009-06-08 17:33:05

Subject: [PATCH] crypto: s390 des3 - permit weak keys unless REQ_WEAK_KEY set

Just started running fips cavs test vectors through an s390x system
for giggles, and discovered that I missed patching s390's arch-specific
des3 implementation w/an earlier des3 patch to permit weak keys.

This change adds the same flag tweaks as ad79cdd77fc1466e45cf923890f66bcfe7c43f12
for s390's des3 implementation, yields expected test results now.

Signed-off-by: Jarod Wilson <[email protected]>

---
arch/s390/crypto/des_s390.c | 11 ++++++-----
1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c
index 4aba83b..2bc479a 100644
--- a/arch/s390/crypto/des_s390.c
+++ b/arch/s390/crypto/des_s390.c
@@ -250,8 +250,9 @@ static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
const u8 *temp_key = key;
u32 *flags = &tfm->crt_flags;

- if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
- *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
+ if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE)) &&
+ (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
return -EINVAL;
}
for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
@@ -411,9 +412,9 @@ static int des3_192_setkey(struct crypto_tfm *tfm, const u8 *key,

if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
- DES_KEY_SIZE))) {

2009-06-11 13:39:08

by Heiko Carstens

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Subject: Re: [PATCH] crypto: s390 des3 - permit weak keys unless REQ_WEAK_KEY set

On Mon, Jun 08, 2009 at 01:32:09PM -0400, Jarod Wilson wrote:
> Just started running fips cavs test vectors through an s390x system
> for giggles, and discovered that I missed patching s390's arch-specific
> des3 implementation w/an earlier des3 patch to permit weak keys.
>
> This change adds the same flag tweaks as ad79cdd77fc1466e45cf923890f66bcfe7c43f12
> for s390's des3 implementation, yields expected test results now.
>
> Signed-off-by: Jarod Wilson <[email protected]>
>
> ---
> arch/s390/crypto/des_s390.c | 11 ++++++-----
> 1 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c
> index 4aba83b..2bc479a 100644
> --- a/arch/s390/crypto/des_s390.c
> +++ b/arch/s390/crypto/des_s390.c
> @@ -250,8 +250,9 @@ static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
> const u8 *temp_key = key;
> u32 *flags = &tfm->crt_flags;
>
> - if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
> - *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
> + if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE)) &&
> + (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
> + *flags |= CRYPTO_TFM_RES_WEAK_KEY;
> return -EINVAL;

I think this should go in via crypt-dev. Herbert?

2009-06-18 11:53:20

by Herbert Xu

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