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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use crate::{
err::{nspr, Error, PR_ErrorToName, PR_ErrorToString, PR_GetError, Res, PR_LANGUAGE_I_DEFAULT},
ssl,
};
use std::ffi::CStr;
pub fn result(rv: ssl::SECStatus) -> Res<()> {
_ = result_helper(rv, false)?;
Ok(())
}
pub fn result_or_blocked(rv: ssl::SECStatus) -> Res<bool> {
result_helper(rv, true)
}
fn wrap_str_fn<F>(f: F, dflt: &str) -> String
where
F: FnOnce() -> *const i8,
{
unsafe {
let p = f();
if p.is_null() {
return dflt.to_string();
}
CStr::from_ptr(p).to_string_lossy().into_owned()
}
}
fn result_helper(rv: ssl::SECStatus, allow_blocked: bool) -> Res<bool> {
if rv == ssl::_SECStatus_SECSuccess {
return Ok(false);
}
let code = unsafe { PR_GetError() };
if allow_blocked && code == nspr::PR_WOULD_BLOCK_ERROR {
return Ok(true);
}
let name = wrap_str_fn(|| unsafe { PR_ErrorToName(code) }, "UNKNOWN_ERROR");
let desc = wrap_str_fn(
|| unsafe { PR_ErrorToString(code, PR_LANGUAGE_I_DEFAULT) },
"...",
);
Err(Error::NssError { name, code, desc })
}
#[cfg(test)]
mod tests {
use super::{result, result_or_blocked};
use crate::{
err::{self, nspr, Error, PRErrorCode, PR_SetError},
ssl,
};
use test_fixture::fixture_init;
fn set_error_code(code: PRErrorCode) {
unsafe { PR_SetError(code, 0) };
}
#[test]
fn is_ok() {
assert!(result(ssl::SECSuccess).is_ok());
}
#[test]
fn is_err() {
// This code doesn't work without initializing NSS first.
fixture_init();
set_error_code(err::ssl::SSL_ERROR_BAD_MAC_READ);
let r = result(ssl::SECFailure);
assert!(r.is_err());
match r.unwrap_err() {
Error::NssError { name, code, desc } => {
assert_eq!(name, "SSL_ERROR_BAD_MAC_READ");
assert_eq!(code, -12273);
assert_eq!(
desc,
"SSL received a record with an incorrect Message Authentication Code."
);
}
_ => unreachable!(),
}
}
#[test]
fn is_err_zero_code() {
// This code doesn't work without initializing NSS first.
fixture_init();
set_error_code(0);
let r = result(ssl::SECFailure);
assert!(r.is_err());
match r.unwrap_err() {
Error::NssError { name, code, .. } => {
assert_eq!(name, "UNKNOWN_ERROR");
assert_eq!(code, 0);
// Note that we don't test |desc| here because that comes from
// strerror(0), which is platform-dependent.
}
_ => unreachable!(),
}
}
#[test]
fn blocked_as_error() {
// This code doesn't work without initializing NSS first.
fixture_init();
set_error_code(nspr::PR_WOULD_BLOCK_ERROR);
let r = result(ssl::SECFailure);
assert!(r.is_err());
match r.unwrap_err() {
Error::NssError { name, code, desc } => {
assert_eq!(name, "PR_WOULD_BLOCK_ERROR");
assert_eq!(code, -5998);
assert_eq!(desc, "The operation would have blocked");
}
_ => panic!("bad error type"),
}
}
#[test]
fn is_blocked() {
set_error_code(nspr::PR_WOULD_BLOCK_ERROR);
assert!(result_or_blocked(ssl::SECFailure).unwrap());
}
}