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crypto: talitos - fix setkey to check key weakness

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Crypto manager test report the following failures:
[    3.061081] alg: skcipher: setkey failed on test 5 for ecb-des-talitos: flags=100
[    3.069342] alg: skcipher-ddst: setkey failed on test 5 for ecb-des-talitos: flags=100
[    3.077754] alg: skcipher-ddst: setkey failed on test 5 for ecb-des-talitos: flags=100

This is due to setkey being expected to detect weak keys.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
LEROY Christophe 2017-10-06 15:04:37 +02:00 committed by Herbert Xu
parent e04a61bebc
commit f384cdc4fa
1 changed files with 8 additions and 0 deletions
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8
drivers/crypto/talitos.c
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@ -1507,12 +1507,20 @@ static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
const u8 *key, unsigned int keylen)
{
struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
u32 tmp[DES_EXPKEY_WORDS];
if (keylen > TALITOS_MAX_KEY_SIZE) {
crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
if (unlikely(crypto_ablkcipher_get_flags(cipher) &
CRYPTO_TFM_REQ_WEAK_KEY) &&
!des_ekey(tmp, key)) {
crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_WEAK_KEY);
return -EINVAL;
}
memcpy(&ctx->key, key, keylen);
ctx->keylen = keylen;