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use fidl::encoding::unpersist;
use fidl_cf_sc_internal_passwordauthenticatorconfig::Config as FidlConfig;
use fuchsia_inspect::Node;
use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
use fuchsia_zircon as zx;
#[derive(Debug)]
pub struct Config {
pub allow_pinweaver: bool,
pub allow_scrypt: bool,
}
impl Config {
pub fn take_from_startup_handle() -> Self {
let config_vmo: zx::Vmo =
take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
.expect("Config VMO handle must be provided and cannot already have been taken.")
.into();
let config_size =
config_vmo.get_content_size().expect("must be able to read config vmo content size");
assert_ne!(config_size, 0, "config vmo must be non-empty");
let mut config_bytes = Vec::new();
config_bytes.resize(config_size as usize, 0);
config_vmo.read(&mut config_bytes, 0).expect("must be able to read config vmo");
let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
let fidl_start = 2 + checksum_length;
let observed_checksum = &config_bytes[2..fidl_start];
let expected_checksum = vec![
0xa5, 0x21, 0xa2, 0xad, 0x82, 0xd4, 0xda, 0x5d, 0x20, 0xd3, 0x14, 0x63, 0xd2, 0x02,
0xbe, 0xb2, 0x87, 0x4e, 0x16, 0x89, 0x6b, 0xdc, 0x2f, 0x75, 0x87, 0x0e, 0x80, 0x12,
0xe7, 0x6f, 0x63, 0x5b,
];
assert_eq!(
observed_checksum, expected_checksum,
"checksum from config VMO does not match expected checksum"
);
let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
.expect("must be able to parse bytes as config FIDL");
Self {
allow_pinweaver: fidl_config.allow_pinweaver,
allow_scrypt: fidl_config.allow_scrypt,
}
}
pub fn record_inspect(&self, inspector_node: &Node) {
inspector_node.record_bool("allow_pinweaver", self.allow_pinweaver);
inspector_node.record_bool("allow_scrypt", self.allow_scrypt);
}
}