Am Donnerstag, 11. Januar 2018, 10:17:10 CET schrieb Gilad Ben-Yossef:
Hi Gilad,
> + // verify weak keys
> + if (ctx_p->flow_mode == S_DIN_to_DES) {
> + if (!des_ekey(tmp, key) &&
> + (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_WEAK_KEY)) {
> + tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
> + dev_dbg(dev, "weak DES key");
> + return -EINVAL;
> + }
> + }
> + if (ctx_p->cipher_mode == DRV_CIPHER_XTS &&
> + xts_check_key(tfm, key, keylen)) {
> + dev_dbg(dev, "weak XTS key");
> + return -EINVAL;
> + }
> + if (ctx_p->flow_mode == S_DIN_to_DES &&
> + keylen == DES3_EDE_KEY_SIZE &&
> + cc_verify_3des_keys(key, keylen)) {
> + dev_dbg(dev, "weak 3DES key");
> + return -EINVAL;
> + }
For the DES key, wouldn't it make sense to use __des3_ede_setkey?
Note, I would plan to release a patch for review to change that function to
disallow key1 == key2 or key1 == key3 or key2 == key3 in FIPS mode.
Ciao
Stephan
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