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use crate::tss2_esys::TPM2B_NONCE;
use crate::{Error, Result, WrapperErrorKind};
use log::error;
use std::convert::TryFrom;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Nonce {
value: Vec<u8>,
}
impl Nonce {
const MAX_SIZE: usize = 64;
pub fn value(&self) -> &[u8] {
&self.value
}
}
impl Default for Nonce {
fn default() -> Self {
Nonce {
value: Vec::<u8>::new(),
}
}
}
impl TryFrom<Vec<u8>> for Nonce {
type Error = Error;
fn try_from(bytes: Vec<u8>) -> Result<Self> {
if bytes.len() > Nonce::MAX_SIZE {
error!("Error: Invalid Vec<u8> size(> {})", Nonce::MAX_SIZE);
return Err(Error::local_error(WrapperErrorKind::WrongParamSize));
}
Ok(Nonce { value: bytes })
}
}
impl TryFrom<TPM2B_NONCE> for Nonce {
type Error = Error;
fn try_from(tss_nonce: TPM2B_NONCE) -> Result<Self> {
let size = tss_nonce.size as usize;
if size > Nonce::MAX_SIZE {
error!("Error: Invalid TPM2B_NONCE size(> {})", Nonce::MAX_SIZE);
return Err(Error::local_error(WrapperErrorKind::WrongParamSize));
}
Ok(Nonce {
value: tss_nonce.buffer[..size].to_vec(),
})
}
}
impl TryFrom<Nonce> for TPM2B_NONCE {
type Error = Error;
fn try_from(nonce: Nonce) -> Result<Self> {
if nonce.value.len() > Nonce::MAX_SIZE {
error!("Error: Invalid data size(> {}) in nonce", Nonce::MAX_SIZE);
return Err(Error::local_error(WrapperErrorKind::WrongParamSize));
}
let mut tss_nonce: TPM2B_NONCE = Default::default();
if !nonce.value.is_empty() {
tss_nonce.size = nonce.value().len() as u16;
tss_nonce.buffer[..nonce.value().len()].copy_from_slice(&nonce.value());
}
Ok(tss_nonce)
}
}