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    Subject[PATCH 01/22] crypto: arm/aes-ce - add check for xts input length equal to zero
    Date
    From: Andrei Botila <andrei.botila@nxp.com>

    Standardize the way input lengths equal to 0 are handled in all skcipher
    algorithms. All the algorithms return 0 for input lengths equal to zero.

    Cc: Russell King <linux@armlinux.org.uk>
    Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
    ---
    arch/arm/crypto/aes-ce-glue.c | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/arch/arm/crypto/aes-ce-glue.c b/arch/arm/crypto/aes-ce-glue.c
    index b668c97663ec..57a9cf7fe98a 100644
    --- a/arch/arm/crypto/aes-ce-glue.c
    +++ b/arch/arm/crypto/aes-ce-glue.c
    @@ -452,6 +452,9 @@ static int xts_encrypt(struct skcipher_request *req)
    struct scatterlist *src, *dst;
    struct skcipher_walk walk;

    + if (!req->cryptlen)
    + return 0;
    +
    if (req->cryptlen < AES_BLOCK_SIZE)
    return -EINVAL;

    @@ -524,6 +527,9 @@ static int xts_decrypt(struct skcipher_request *req)
    struct scatterlist *src, *dst;
    struct skcipher_walk walk;

    + if (!req->cryptlen)
    + return 0;
    +
    if (req->cryptlen < AES_BLOCK_SIZE)
    return -EINVAL;

    --
    2.17.1
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