Re: [PULL 04/20] crypto: Redundant type conversion for AES_KEY pointer

["Daniel P. Berrangé" <berrange@redhat.com>]

Hi Chen,

This patch triggered a build failure in QEMU about discarding the
"const" qualifier.

IOW, the type conversion is not redundant after all - it is required
in order to explicitly discard "const".

I believe we can probably fix this by changing
qcrypto_cipher_aes_ecb_(en|de)crypt() methods so that they also have
a "const" qualifier on the AES_KEY parameter.

On Mon, May 04, 2020 at 01:57:42PM +0200, Laurent Vivier wrote:
> From: Chen Qun <kuhn.chenqun@huawei.com>
> 
> Fix: eaec903c5b8
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
> Acked-by: Daniel P. Berrangé <berrange@redhat.com>
> Reviewed-by: Laurent Vivier <laurent@vivier.eu>
> Message-Id: <20200325092137.24020-4-kuhn.chenqun@huawei.com>
> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
> ---
>  crypto/cipher-builtin.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/crypto/cipher-builtin.c b/crypto/cipher-builtin.c
> index bf8413e71a6e..99d6280a1669 100644
> --- a/crypto/cipher-builtin.c
> +++ b/crypto/cipher-builtin.c
> @@ -133,8 +133,7 @@ static void qcrypto_cipher_aes_xts_encrypt(const void *ctx,
>  {
>      const QCryptoCipherBuiltinAESContext *aesctx = ctx;
>  
> -    qcrypto_cipher_aes_ecb_encrypt((AES_KEY *)&aesctx->enc,
> -                                   src, dst, length);
> +    qcrypto_cipher_aes_ecb_encrypt(&aesctx->enc, src, dst, length);
>  }
>  
>  
> @@ -145,8 +144,7 @@ static void qcrypto_cipher_aes_xts_decrypt(const void *ctx,
>  {
>      const QCryptoCipherBuiltinAESContext *aesctx = ctx;
>  
> -    qcrypto_cipher_aes_ecb_decrypt((AES_KEY *)&aesctx->dec,
> -                                   src, dst, length);
> +    qcrypto_cipher_aes_ecb_decrypt(&aesctx->dec, src, dst, length);
>  }
>  
>  
> -- 
> 2.26.2
> 

Regards,
Daniel
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