libkrb5 0.0.3

[UNMAINTAINED] Rust bindings for MIT Kerberos 5
Documentation 
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use std::mem::MaybeUninit;

use libkrb5_sys::*;

use crate::ccache::Krb5CCache;
use crate::context::Krb5Context;
use crate::error::{krb5_error_code_escape_hatch, Krb5Error};

#[derive(Debug)]
pub struct Krb5CCCol<'a> {
    pub(crate) context: &'a Krb5Context,
    pub(crate) cursor: krb5_cccol_cursor,
}

impl<'a> Krb5CCCol<'a> {
    pub fn new(context: &Krb5Context) -> Result<Krb5CCCol, Krb5Error> {
        let mut cursor_ptr: MaybeUninit<krb5_cccol_cursor> = MaybeUninit::zeroed();

        let code: krb5_error_code = unsafe { krb5_cccol_cursor_new(context.context, cursor_ptr.as_mut_ptr()) };

        krb5_error_code_escape_hatch(context, code)?;

        let cursor = Krb5CCCol {
            context: &context,
            cursor: unsafe { cursor_ptr.assume_init() },
        };

        Ok(cursor)
    }
}

impl<'a> Drop for Krb5CCCol<'a> {
    fn drop(&mut self) {
        unsafe {
            krb5_cccol_cursor_free(self.context.context, &mut self.cursor);
        }
    }
}

impl<'a> Iterator for Krb5CCCol<'a> {
    type Item = Result<Krb5CCache<'a>, Krb5Error>;

    fn next(&mut self) -> Option<Self::Item> {
        let mut ccache_ptr: MaybeUninit<krb5_ccache> = MaybeUninit::zeroed();

        let code: krb5_error_code =
            unsafe { krb5_cccol_cursor_next(self.context.context, self.cursor, ccache_ptr.as_mut_ptr()) };

        krb5_error_code_escape_hatch(self.context, code).ok()?;

        let ccache_ptr = unsafe { ccache_ptr.assume_init() };

        if ccache_ptr.is_null() {
            return None;
        }

        let ccache = Krb5CCache {
            context: &self.context,
            ccache: ccache_ptr,
        };

        Some(Ok(ccache))
    }
}