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| author | Evgeniy Polyakov <johnpol@2ka.mipt.ru> | 2007-10-11 19:58:16 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2008-01-11 08:16:03 +1100 |
| commit | c3041f9c93e31159f4e321abea7c1549d271e6a7 (patch) | |
| tree | 12a4b27c2717f2935ccac0f1873c19e09492d4c7 /drivers/crypto/hifn_795x.c | |
| parent | 16d004a2eda7be2c6a2de63eca2ad3c6b57307b3 (diff) | |
| download | lwn-c3041f9c93e31159f4e321abea7c1549d271e6a7.tar.gz lwn-c3041f9c93e31159f4e321abea7c1549d271e6a7.zip | |
[CRYPTO] hifn_795x: Detect weak keys
HIFN driver update to use DES weak key checks (exported in this patch).
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/hifn_795x.c')
| -rw-r--r-- | drivers/crypto/hifn_795x.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c index e3376f2236b2..391c20a3dff8 100644 --- a/drivers/crypto/hifn_795x.c +++ b/drivers/crypto/hifn_795x.c @@ -29,6 +29,7 @@ #include <linux/crypto.h> #include <crypto/algapi.h> +#include <crypto/des.h> #include <asm/kmap_types.h> @@ -1924,6 +1925,16 @@ static int hifn_setkey(struct crypto_ablkcipher *cipher, const u8 *key, return -1; } + if (len == HIFN_DES_KEY_LENGTH) { + u32 tmp[DES_EXPKEY_WORDS]; + int ret = des_ekey(tmp, key); + + if (unlikely(ret == 0) && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { + tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; + return -EINVAL; + } + } + dev->flags &= ~HIFN_FLAG_OLD_KEY; memcpy(ctx->key, key, len); |