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

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

[Jarod Wilson]

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 <jarod@redhat.com>

---
 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))) {
-
-		*flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
+		   DES_KEY_SIZE)) &&
+	    (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+		*flags |= CRYPTO_TFM_RES_WEAK_KEY;
 		return -EINVAL;
 	}
 	for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {

-- 
Jarod Wilson
jarod@redhat.com

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

[Heiko Carstens]

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 <jarod@redhat.com>
> 
> ---
>  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?

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

[Herbert Xu]

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 <jarod@redhat.com>

Patch applied to cryptodev.  Thanks Jarod!
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