예제 #1
0
/*
 * The verify operation is here for completeness similar to the verification
 * defined in RFC2313 section 10.2 except that block type 0 is not accepted,
 * as in RFC2437.  RFC2437 section 9.2 doesn't define any operation to
 * retrieve the DigestInfo from a signature, instead the user is expected
 * to call the sign operation to generate the expected signature and compare
 * signatures instead of the message-digests.
 */
static int pkcs1pad_verify(struct akcipher_request *req)
{
	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
	struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm);
	struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req);
	int err;

	if (!ctx->key_size || req->src_len < ctx->key_size)
		return -EINVAL;

	req_ctx->out_buf = kmalloc(ctx->key_size, GFP_KERNEL);
	if (!req_ctx->out_buf)
		return -ENOMEM;

	pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf,
			    ctx->key_size, NULL);

	akcipher_request_set_tfm(&req_ctx->child_req, ctx->child);
	akcipher_request_set_callback(&req_ctx->child_req, req->base.flags,
			pkcs1pad_verify_complete_cb, req);

	/* Reuse input buffer, output to a new buffer */
	akcipher_request_set_crypt(&req_ctx->child_req, req->src,
				   req_ctx->out_sg, req->src_len,
				   ctx->key_size);

	err = crypto_akcipher_verify(&req_ctx->child_req);
	if (err != -EINPROGRESS && err != -EBUSY)
		return pkcs1pad_verify_complete(req, err);

	return err;
}
예제 #2
0
파일: rsa-pkcs1pad.c 프로젝트: 1888/linux
static void pkcs1pad_verify_complete_cb(
		struct crypto_async_request *child_async_req, int err)
{
	struct akcipher_request *req = child_async_req->data;
	struct crypto_async_request async_req;

	if (err == -EINPROGRESS)
		return;

	async_req.data = req->base.data;
	async_req.tfm = crypto_akcipher_tfm(crypto_akcipher_reqtfm(req));
	async_req.flags = child_async_req->flags;
	req->base.complete(&async_req, pkcs1pad_verify_complete(req, err));
}
예제 #3
0
파일: rsa-pkcs1pad.c 프로젝트: 1888/linux
/*
 * The verify operation is here for completeness similar to the verification
 * defined in RFC2313 section 10.2 except that block type 0 is not accepted,
 * as in RFC2437.  RFC2437 section 9.2 doesn't define any operation to
 * retrieve the DigestInfo from a signature, instead the user is expected
 * to call the sign operation to generate the expected signature and compare
 * signatures instead of the message-digests.
 */
static int pkcs1pad_verify(struct akcipher_request *req)
{
	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
	struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm);
	struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req);
	int err;

	if (!ctx->key_size || req->src_len < ctx->key_size)
		return -EINVAL;

	if (ctx->key_size > PAGE_SIZE)
		return -ENOTSUPP;

	/* Reuse input buffer, output to a new buffer */
	req_ctx->child_req.src = req->src;
	req_ctx->child_req.src_len = req->src_len;
	req_ctx->child_req.dst = req_ctx->out_sg;
	req_ctx->child_req.dst_len = ctx->key_size - 1;

	req_ctx->out_buf = kmalloc(ctx->key_size - 1,
			(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
			GFP_KERNEL : GFP_ATOMIC);
	if (!req_ctx->out_buf)
		return -ENOMEM;

	pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf,
			ctx->key_size - 1, NULL);

	akcipher_request_set_tfm(&req_ctx->child_req, ctx->child);
	akcipher_request_set_callback(&req_ctx->child_req, req->base.flags,
			pkcs1pad_verify_complete_cb, req);

	err = crypto_akcipher_verify(&req_ctx->child_req);
	if (err != -EINPROGRESS &&
			(err != -EBUSY ||
			 !(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)))
		return pkcs1pad_verify_complete(req, err);

	return err;
}