コード例 #1
0
ファイル: ablkcipher.c プロジェクト: johnny/CobraDroidBeta
static int setkey(struct crypto_ablkcipher *tfm, const u8 *key,
		  unsigned int keylen)
{
	struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
	unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);

	if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
		crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
		return -EINVAL;
	}

	if ((unsigned long)key & alignmask)
		return setkey_unaligned(tfm, key, keylen);

	return cipher->setkey(tfm, key, keylen);
}
コード例 #2
0
ファイル: cryptd.c プロジェクト: 3sOx/asuswrt-merlin
static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
				    crypto_completion_t complete)
{
	struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
	struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
	struct cryptd_state *state =
		cryptd_get_state(crypto_ablkcipher_tfm(tfm));
	int err;

	rctx->complete = req->base.complete;
	req->base.complete = complete;

	spin_lock_bh(&state->lock);
	err = ablkcipher_enqueue_request(crypto_ablkcipher_alg(tfm), req);
	spin_unlock_bh(&state->lock);

	wake_up_process(state->task);
	return err;
}
コード例 #3
0
ファイル: ablkcipher.c プロジェクト: johnny/CobraDroidBeta
static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key,
			    unsigned int keylen)
{
	struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
	unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
	int ret;
	u8 *buffer, *alignbuffer;
	unsigned long absize;

	absize = keylen + alignmask;
	buffer = kmalloc(absize, GFP_ATOMIC);
	if (!buffer)
		return -ENOMEM;

	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
	memcpy(alignbuffer, key, keylen);
	ret = cipher->setkey(tfm, alignbuffer, keylen);
	memset(alignbuffer, 0, keylen);
	kfree(buffer);
	return ret;
}
コード例 #4
0
int cryptodev_cipher_init(struct cipher_data *out, const char *alg_name,
				uint8_t *keyp, size_t keylen, int stream, int aead)
{
	int ret;

	if (aead == 0) {
		struct ablkcipher_alg *alg;

		out->async.s = crypto_alloc_ablkcipher(alg_name, 0, 0);
		if (unlikely(IS_ERR(out->async.s))) {
			ddebug(1, "Failed to load cipher %s", alg_name);
				return -EINVAL;
		}

		alg = crypto_ablkcipher_alg(out->async.s);
		if (alg != NULL) {
			/* Was correct key length supplied? */
			if (alg->max_keysize > 0 &&
					unlikely((keylen < alg->min_keysize) ||
					(keylen > alg->max_keysize))) {
				ddebug(1, "Wrong keylen '%zu' for algorithm '%s'. Use %u to %u.",
						keylen, alg_name, alg->min_keysize, alg->max_keysize);
				ret = -EINVAL;
				goto error;
			}
		}

		out->blocksize = crypto_ablkcipher_blocksize(out->async.s);
		out->ivsize = crypto_ablkcipher_ivsize(out->async.s);
		out->alignmask = crypto_ablkcipher_alignmask(out->async.s);

		ret = crypto_ablkcipher_setkey(out->async.s, keyp, keylen);
	} else {
		out->async.as = crypto_alloc_aead(alg_name, 0, 0);
		if (unlikely(IS_ERR(out->async.as))) {
			ddebug(1, "Failed to load cipher %s", alg_name);
			return -EINVAL;
		}

		out->blocksize = crypto_aead_blocksize(out->async.as);
		out->ivsize = crypto_aead_ivsize(out->async.as);
		out->alignmask = crypto_aead_alignmask(out->async.as);

		ret = crypto_aead_setkey(out->async.as, keyp, keylen);
	}

	if (unlikely(ret)) {
		ddebug(1, "Setting key failed for %s-%zu.", alg_name, keylen*8);
		ret = -EINVAL;
		goto error;
	}

	out->stream = stream;
	out->aead = aead;

	out->async.result = kzalloc(sizeof(*out->async.result), GFP_KERNEL);
	if (unlikely(!out->async.result)) {
		ret = -ENOMEM;
		goto error;
	}

	init_completion(&out->async.result->completion);

	if (aead == 0) {
		out->async.request = ablkcipher_request_alloc(out->async.s, GFP_KERNEL);
		if (unlikely(!out->async.request)) {
			derr(1, "error allocating async crypto request");
			ret = -ENOMEM;
			goto error;
		}

		ablkcipher_request_set_callback(out->async.request,
					CRYPTO_TFM_REQ_MAY_BACKLOG,
					cryptodev_complete, out->async.result);
	} else {
		out->async.arequest = aead_request_alloc(out->async.as, GFP_KERNEL);
		if (unlikely(!out->async.arequest)) {
			derr(1, "error allocating async crypto request");
			ret = -ENOMEM;
			goto error;
		}

		aead_request_set_callback(out->async.arequest,
					CRYPTO_TFM_REQ_MAY_BACKLOG,
					cryptodev_complete, out->async.result);
	}

	out->init = 1;
	return 0;
error:
	if (aead == 0) {
		if (out->async.request)
			ablkcipher_request_free(out->async.request);
		if (out->async.s)
			crypto_free_ablkcipher(out->async.s);
	} else {
		if (out->async.arequest)
			aead_request_free(out->async.arequest);
		if (out->async.as)
			crypto_free_aead(out->async.as);
	}
	kfree(out->async.result);

	return ret;
}