crypto: drbg - leave cipher handles operational
As the DRBG does not operate on shadow copies of the DRBG instance any more, the cipher handles only need to be allocated once during initalization time and deallocated during uninstantiate time. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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76899a41f8
Коммит
fa3ae6253c
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@ -1249,11 +1249,6 @@ static int drbg_generate(struct drbg_state *drbg,
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if ((drbg_max_requests(drbg)) < drbg->reseed_ctr)
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drbg->seeded = false;
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/* allocate cipher handle */
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len = drbg->d_ops->crypto_init(drbg);
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if (len)
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goto err;
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if (drbg->pr || !drbg->seeded) {
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pr_devel("DRBG: reseeding before generation (prediction "
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"resistance: %s, state %s)\n",
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@ -1325,7 +1320,6 @@ static int drbg_generate(struct drbg_state *drbg,
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*/
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len = 0;
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err:
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drbg->d_ops->crypto_fini(drbg);
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return len;
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}
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@ -1424,9 +1418,10 @@ static int drbg_instantiate(struct drbg_state *drbg, struct drbg_string *pers,
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if (drbg->d_ops->crypto_init(drbg))
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goto err;
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ret = drbg_seed(drbg, pers, false);
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drbg->d_ops->crypto_fini(drbg);
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if (ret)
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if (ret) {
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drbg->d_ops->crypto_fini(drbg);
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goto err;
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}
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mutex_unlock(&drbg->drbg_mutex);
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return 0;
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@ -1450,6 +1445,7 @@ unlock:
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static int drbg_uninstantiate(struct drbg_state *drbg)
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{
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mutex_lock(&drbg->drbg_mutex);
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drbg->d_ops->crypto_fini(drbg);
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drbg_dealloc_state(drbg);
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/* no scrubbing of test_data -- this shall survive an uninstantiate */
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mutex_unlock(&drbg->drbg_mutex);
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