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use libc::c_ulong;
use std::fmt;
use std::error;
use std::ffi::CStr;
use std::io;
use std::str;
use ffi;
#[derive(Debug)]
pub struct ErrorStack(Vec<Error>);
impl ErrorStack {
/// Returns the contents of the OpenSSL error stack.
pub fn get() -> ErrorStack {
let mut vec = vec![];
while let Some(err) = Error::get() {
vec.push(err);
}
ErrorStack(vec)
}
}
impl ErrorStack {
/// Returns the errors in the stack.
pub fn errors(&self) -> &[Error] {
&self.0
}
}
impl fmt::Display for ErrorStack {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
let mut first = true;
for err in &self.0 {
if first {
try!(fmt.write_str(", "));
first = false;
}
try!(write!(fmt, "{}", err));
}
Ok(())
}
}
impl error::Error for ErrorStack {
fn description(&self) -> &str {
"An OpenSSL error stack"
}
}
impl From<ErrorStack> for io::Error {
fn from(e: ErrorStack) -> io::Error {
io::Error::new(io::ErrorKind::Other, e)
}
}
/// An error reported from OpenSSL.
pub struct Error(c_ulong);
impl Error {
/// Returns the first error on the OpenSSL error stack.
pub fn get() -> Option<Error> {
ffi::init();
match unsafe { ffi::ERR_get_error() } {
0 => None,
err => Some((Error(err))),
}
}
/// Returns the raw OpenSSL error code for this error.
pub fn error_code(&self) -> c_ulong {
self.0
}
/// Returns the name of the library reporting the error.
pub fn library(&self) -> &'static str {
get_lib(self.0)
}
/// Returns the name of the function reporting the error.
pub fn function(&self) -> &'static str {
get_func(self.0)
}
/// Returns the reason for the error.
pub fn reason(&self) -> &'static str {
get_reason(self.0)
}
}
impl fmt::Debug for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.debug_struct("Error")
.field("library", &self.library())
.field("function", &self.function())
.field("reason", &self.reason())
.finish()
}
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str(&self.reason())
}
}
impl error::Error for Error {
fn description(&self) -> &str {
"An OpenSSL error"
}
}
fn get_lib(err: c_ulong) -> &'static str {
unsafe {
let cstr = ffi::ERR_lib_error_string(err);
let bytes = CStr::from_ptr(cstr as *const _).to_bytes();
str::from_utf8(bytes).unwrap()
}
}
fn get_func(err: c_ulong) -> &'static str {
unsafe {
let cstr = ffi::ERR_func_error_string(err);
let bytes = CStr::from_ptr(cstr as *const _).to_bytes();
str::from_utf8(bytes).unwrap()
}
}
fn get_reason(err: c_ulong) -> &'static str {
unsafe {
let cstr = ffi::ERR_reason_error_string(err);
let bytes = CStr::from_ptr(cstr as *const _).to_bytes();
str::from_utf8(bytes).unwrap()
}
}
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