Am Dienstag, 14. Juni 2016, 16:14:58 schrieb Tudor Ambarus:
Hi Tudor,
> static int rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
> unsigned int keylen)
> {
> - struct rsa_key *pkey = akcipher_tfm_ctx(tfm);
> + struct rsa_mpi_key *mpi_key = akcipher_tfm_ctx(tfm);
> + struct rsa_key raw_key = {0};
> int ret;
>
> - ret = rsa_parse_priv_key(pkey, key, keylen);
> + /* Free the old MPI key if any */
> + rsa_free_mpi_key(mpi_key);
> +
> + ret = rsa_parse_priv_key(&raw_key, key, keylen);
> if (ret)
> return ret;
>
> - if (rsa_check_key_length(mpi_get_size(pkey->n) << 3)) {
> - rsa_free_key(pkey);
> - ret = -EINVAL;
> + mpi_key->d = mpi_read_raw_data(raw_key.d, raw_key.d_sz);
> + if (!mpi_key->d)
> + goto err;
> +
> + mpi_key->e = mpi_read_raw_data(raw_key.e, raw_key.e_sz);
> + if (!mpi_key->e)
> + goto err;
> +
> + mpi_key->n = mpi_read_raw_data(raw_key.n, raw_key.n_sz);
> + if (!mpi_key->n)
> + goto err;
> +
> + if (rsa_check_key_length(mpi_get_size(mpi_key->n) << 3)) {
> + rsa_free_mpi_key(mpi_key);
> + return -EINVAL;
> }
> - return ret;
> +
> + return 0;
> +
> +err:
> + rsa_free_mpi_key(mpi_key);
> + return -ENOMEM;
> }
memzero_explicit(raw_key) should be added here in success and failure code
paths.
Ciao
Stephan
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