crypto: mediatek - Add empty messages check in GCM mode (e4727066) · Commits · 戴 / test

Currently, empty messages are not supported in GCM mode, hence add a check to prevent producing incorrect results. Signed-off-by:

drivers/crypto/mediatek/mtk-aes.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -928,8 +928,13 @@ static int mtk_aes_gcm_start(struct mtk_cryp cryp, struct mtk_aes_rec aes)
		static int mtk_aes_gcm_crypt(struct aead_request *req, u64 mode)
		{
		struct mtk_aes_base_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
		struct mtk_aes_gcm_ctx *gctx = mtk_aes_gcm_ctx_cast(ctx);
		struct mtk_aes_reqctx *rctx = aead_request_ctx(req);

		/* Empty messages are not supported yet */
		if (!gctx->textlen && !req->assoclen)
		return -EINVAL;

		rctx->mode = AES_FLAGS_GCM \| mode;

		return mtk_aes_handle_queue(ctx->cryp, !!(mode & AES_FLAGS_ENCRYPT),