use crate::context::Function;
use crate::error::{Result, Rv};
use crate::mechanism::Mechanism;
use crate::session::Session;
use cryptoki_sys::*;
use std::convert::TryInto;
impl Session {
pub fn digest(&self, m: &Mechanism, data: &[u8]) -> Result<Vec<u8>> {
let mut mechanism: CK_MECHANISM = m.into();
let mut digest_len = 0;
unsafe {
Rv::from(get_pkcs11!(self.client(), C_DigestInit)(
self.handle(),
&mut mechanism as CK_MECHANISM_PTR,
))
.into_result(Function::DigestInit)?;
}
unsafe {
Rv::from(get_pkcs11!(self.client(), C_Digest)(
self.handle(),
data.as_ptr() as *mut u8,
data.len().try_into()?,
std::ptr::null_mut(),
&mut digest_len,
))
.into_result(Function::Digest)?;
}
let mut digest = vec![0; digest_len.try_into()?];
unsafe {
Rv::from(get_pkcs11!(self.client(), C_Digest)(
self.handle(),
data.as_ptr() as *mut u8,
data.len().try_into()?,
digest.as_mut_ptr(),
&mut digest_len,
))
.into_result(Function::Digest)?;
}
digest.resize(digest_len.try_into()?, 0);
Ok(digest)
}
}