Re: [PATCH v18 19/25] x86/sgx: Add provisioning

[Jethro Beekman <jethro@fortanix.com>]

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On 2018-12-22 04:41, Jarkko Sakkinen wrote:
> In order to provide a mechanism for devilering provisoning rights:
> 
> 1. Add a new file to the securityfs file called sgx/provision that works
>     as a token for allowing an enclave to have the provisioning privileges.
> 2. Add a new ioctl called SGX_IOC_ENCLAVE_SET_ATTRIBUTE that accepts the
>     following data structure:
> 
>     struct sgx_enclave_set_attribute {
>             __u64 addr;
>             __u64 token_fd;
>     };
> 
> A daemon could sit on top of sgx/provision and send a file descriptor of
> this file to a process that needs to be able to provision enclaves.
> 
> The way this API is used is more or less straight-forward. Lets assume that
> dev_fd is a handle to /dev/sgx and prov_fd is a handle to sgx/provision.
> You would allow SGX_IOC_ENCLAVE_CREATE to initialize an enclave with the
> PROVISIONKEY attribute by
> 
> params.addr = <enclave address>;
> params.token_fd = prov_fd;
> 
> ioctl(dev_fd, SGX_IOC_ENCLAVE_SET_ATTRIBUTE, &params);

I think the attribute handling in this and the previous patch doesn't 
work. How am I supposed to call this ioctl between sgx_encl_alloc and 
sgx_encl_create in sgx_ioc_enclave_create? Even if I somehow manage to 
call this, how is secs->attributes getting set? How do I unset 
SGX_ATTR_DEBUG?

--
Jethro Beekman | Fortanix


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