Re: [PATCH 1/2] linux-user: Implement SOL_ALG encryption support

[Laurent Vivier <laurent@vivier.eu>]

Le 12/12/2022 à 18:34, Helge Deller a écrit :
> Add suport to handle SOL_ALG packets via sendmsg() and recvmsg().
> This allows emulated userspace to use encryption functionality.
> 
> Tested with the debian ell package with hppa guest on x86_64 host.
> 
> Signed-off-by: Helge Deller <deller@gmx.de>
> ---
>   linux-user/syscall.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 71ae867024..a365903a3a 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -1871,6 +1871,14 @@ static inline abi_long target_to_host_cmsg(struct msghdr *msgh,
>               __get_user(cred->pid, &target_cred->pid);
>               __get_user(cred->uid, &target_cred->uid);
>               __get_user(cred->gid, &target_cred->gid);
> +        } else if (cmsg->cmsg_level == SOL_ALG) {
> +            uint32_t *dst = (uint32_t *)data;
> +
> +            memcpy(dst, target_data, len);
> +            /* fix endianess of first 32-bit word */
> +            if (len >= sizeof(uint32_t)) {
> +                *dst = tswap32(*dst);
> +            }
>           } else {
>               qemu_log_mask(LOG_UNIMP, "Unsupported ancillary data: %d/%d\n",
>                             cmsg->cmsg_level, cmsg->cmsg_type);
> --
> 2.38.1
> 
> 

Reviewed-by: Laurent Vivier <laurent@vivier.eu>