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| author | Ryder Lee <ryder.lee@mediatek.com> | 2017-08-22 15:53:39 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-09-22 17:43:08 +0800 |
| commit | e47270665b5fcdf8a9ae628e603119e998ca3715 (patch) | |
| tree | 360dbd14aef94b8a2b13e2233917d6af2143cef0 /drivers/crypto/mediatek | |
| parent | b7e2753040a2fef0f748c615121577da3f846781 (diff) | |
| download | linux-e47270665b5fcdf8a9ae628e603119e998ca3715.tar.gz linux-e47270665b5fcdf8a9ae628e603119e998ca3715.tar.bz2 linux-e47270665b5fcdf8a9ae628e603119e998ca3715.zip | |
crypto: mediatek - Add empty messages check in GCM mode
Currently, empty messages are not supported in GCM mode, hence add
a check to prevent producing incorrect results.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/mediatek')
| -rw-r--r-- | drivers/crypto/mediatek/mtk-aes.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/crypto/mediatek/mtk-aes.c b/drivers/crypto/mediatek/mtk-aes.c index 9e845e866dec..72e4549ed36b 100644 --- a/drivers/crypto/mediatek/mtk-aes.c +++ b/drivers/crypto/mediatek/mtk-aes.c @@ -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), |