rustls_cng/
error.rs

1//! Error struct
2
3use std::fmt;
4
5use windows_sys::{
6    core::HRESULT,
7    Win32::Foundation::{GetLastError, ERROR_SUCCESS, WIN32_ERROR},
8};
9
10/// Errors that may be returned in this crate
11#[derive(Debug, Clone, PartialEq)]
12#[non_exhaustive]
13pub enum CngError {
14    InvalidHashLength,
15    UnsupportedKeyAlgorithmGroup,
16    WindowsError(u32),
17}
18
19impl fmt::Display for CngError {
20    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
21        match self {
22            CngError::InvalidHashLength => write!(f, "Invalid hash length"),
23            CngError::UnsupportedKeyAlgorithmGroup => write!(f, "Unsupported key algorithm group"),
24            CngError::WindowsError(code) => write!(f, "Error code {:08x}", code),
25        }
26    }
27}
28
29impl std::error::Error for CngError {}
30
31impl CngError {
32    pub fn from_win32_error() -> Self {
33        unsafe { Self::WindowsError(GetLastError()) }
34    }
35
36    pub fn from_hresult(result: HRESULT) -> crate::Result<()> {
37        if result as WIN32_ERROR == ERROR_SUCCESS {
38            Ok(())
39        } else {
40            Err(CngError::WindowsError(result as _))
41        }
42    }
43}
rustls_cng/error.rs

rustls_cng/
error.rs
