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[CRYPTO] hifn_795x: Detect weak keys

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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>
This commit is contained in:
Evgeniy Polyakov
2007-10-11 19:58:16 +08:00
committed by Herbert Xu
parent 16d004a2ed
commit c3041f9c93
3 changed files with 17 additions and 5 deletions
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11
drivers/crypto/hifn_795x.c
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@ -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);