rust_keylock 0.3.0

A password manager with goals to be Secure, Simple to use, Portable and Extensible
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</pre><pre class='rust '>
<span class='comment'>// Copyright 2013 The Rust Project Developers. See the COPYRIGHT</span>
<span class='comment'>// file at the top-level directory of this distribution and at</span>
<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span>
<span class='comment'>//</span>
<span class='comment'>// Licensed under the Apache License, Version 2.0 &lt;LICENSE-APACHE or</span>
<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0&gt; or the MIT license</span>
<span class='comment'>// &lt;LICENSE-MIT or http://opensource.org/licenses/MIT&gt;, at your</span>
<span class='comment'>// option. This file may not be copied, modified, or distributed</span>
<span class='comment'>// except according to those terms.</span>

<span class='doccomment'>//! A wrapper around any Read to treat it as an RNG.</span>

<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>::{<span class='self'>self</span>, <span class='ident'>Read</span>};
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>mem</span>;
<span class='kw'>use</span> <span class='ident'>Rng</span>;

<span class='doccomment'>/// An RNG that reads random bytes straight from a `Read`. This will</span>
<span class='doccomment'>/// work best with an infinite reader, but this is not required.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Panics</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// It will panic if it there is insufficient data to fulfill a request.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Example</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```rust</span>
<span class='doccomment'>/// use rand::{read, Rng};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let data = vec![1, 2, 3, 4, 5, 6, 7, 8];</span>
<span class='doccomment'>/// let mut rng = read::ReadRng::new(&amp;data[..]);</span>
<span class='doccomment'>/// println!(&quot;{:x}&quot;, rng.gen::&lt;u32&gt;());</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>ReadRng</span><span class='op'>&lt;</span><span class='ident'>R</span><span class='op'>&gt;</span> {
    <span class='ident'>reader</span>: <span class='ident'>R</span>
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='ident'>R</span>: <span class='ident'>Read</span><span class='op'>&gt;</span> <span class='ident'>ReadRng</span><span class='op'>&lt;</span><span class='ident'>R</span><span class='op'>&gt;</span> {
    <span class='doccomment'>/// Create a new `ReadRng` from a `Read`.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>r</span>: <span class='ident'>R</span>) <span class='op'>-&gt;</span> <span class='ident'>ReadRng</span><span class='op'>&lt;</span><span class='ident'>R</span><span class='op'>&gt;</span> {
        <span class='ident'>ReadRng</span> {
            <span class='ident'>reader</span>: <span class='ident'>r</span>
        }
    }
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='ident'>R</span>: <span class='ident'>Read</span><span class='op'>&gt;</span> <span class='ident'>Rng</span> <span class='kw'>for</span> <span class='ident'>ReadRng</span><span class='op'>&lt;</span><span class='ident'>R</span><span class='op'>&gt;</span> {
    <span class='kw'>fn</span> <span class='ident'>next_u32</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>u32</span> {
        <span class='comment'>// This is designed for speed: reading a LE integer on a LE</span>
        <span class='comment'>// platform just involves blitting the bytes into the memory</span>
        <span class='comment'>// of the u32, similarly for BE on BE; avoiding byteswapping.</span>
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>4</span>];
        <span class='ident'>fill</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>reader</span>, <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>buf</span>).<span class='ident'>unwrap</span>();
        <span class='kw'>unsafe</span> { <span class='kw-2'>*</span>(<span class='ident'>buf</span>.<span class='ident'>as_ptr</span>() <span class='kw'>as</span> <span class='kw-2'>*</span><span class='kw'>const</span> <span class='ident'>u32</span>) }
    }
    <span class='kw'>fn</span> <span class='ident'>next_u64</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>u64</span> {
        <span class='comment'>// see above for explanation.</span>
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>8</span>];
        <span class='ident'>fill</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>reader</span>, <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>buf</span>).<span class='ident'>unwrap</span>();
        <span class='kw'>unsafe</span> { <span class='kw-2'>*</span>(<span class='ident'>buf</span>.<span class='ident'>as_ptr</span>() <span class='kw'>as</span> <span class='kw-2'>*</span><span class='kw'>const</span> <span class='ident'>u64</span>) }
    }
    <span class='kw'>fn</span> <span class='ident'>fill_bytes</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>v</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) {
        <span class='kw'>if</span> <span class='ident'>v</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> { <span class='kw'>return</span> }
        <span class='ident'>fill</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>reader</span>, <span class='ident'>v</span>).<span class='ident'>unwrap</span>();
    }
}

<span class='kw'>fn</span> <span class='ident'>fill</span>(<span class='ident'>r</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>Read</span>, <span class='kw-2'>mut</span> <span class='ident'>buf</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'>&lt;</span>()<span class='op'>&gt;</span> {
    <span class='kw'>while</span> <span class='ident'>buf</span>.<span class='ident'>len</span>() <span class='op'>&gt;</span> <span class='number'>0</span> {
        <span class='kw'>match</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>r</span>.<span class='ident'>read</span>(<span class='ident'>buf</span>)) {
            <span class='number'>0</span> <span class='op'>=&gt;</span> <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='ident'>io</span>::<span class='ident'>Error</span>::<span class='ident'>new</span>(<span class='ident'>io</span>::<span class='ident'>ErrorKind</span>::<span class='ident'>Other</span>,
                                           <span class='string'>&quot;end of file reached&quot;</span>)),
            <span class='ident'>n</span> <span class='op'>=&gt;</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>mem</span>::<span class='ident'>replace</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>buf</span>, <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> [])[<span class='ident'>n</span>..],
        }
    }
    <span class='prelude-val'>Ok</span>(())
}

<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span>
<span class='kw'>mod</span> <span class='ident'>test</span> {
    <span class='kw'>use</span> <span class='kw'>super</span>::<span class='ident'>ReadRng</span>;
    <span class='kw'>use</span> <span class='ident'>Rng</span>;

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_reader_rng_u64</span>() {
        <span class='comment'>// transmute from the target to avoid endianness concerns.</span>
        <span class='kw'>let</span> <span class='ident'>v</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>0u8</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>,
                     <span class='number'>0</span>  , <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>2</span>,
                     <span class='number'>0</span>,   <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>3</span>];
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>rng</span> <span class='op'>=</span> <span class='ident'>ReadRng</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='ident'>v</span>[..]);

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>rng</span>.<span class='ident'>next_u64</span>(), <span class='number'>1_u64</span>.<span class='ident'>to_be</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>rng</span>.<span class='ident'>next_u64</span>(), <span class='number'>2_u64</span>.<span class='ident'>to_be</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>rng</span>.<span class='ident'>next_u64</span>(), <span class='number'>3_u64</span>.<span class='ident'>to_be</span>());
    }
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_reader_rng_u32</span>() {
        <span class='kw'>let</span> <span class='ident'>v</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>0u8</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>2</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>3</span>];
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>rng</span> <span class='op'>=</span> <span class='ident'>ReadRng</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='ident'>v</span>[..]);

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>rng</span>.<span class='ident'>next_u32</span>(), <span class='number'>1_u32</span>.<span class='ident'>to_be</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>rng</span>.<span class='ident'>next_u32</span>(), <span class='number'>2_u32</span>.<span class='ident'>to_be</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>rng</span>.<span class='ident'>next_u32</span>(), <span class='number'>3_u32</span>.<span class='ident'>to_be</span>());
    }
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_reader_rng_fill_bytes</span>() {
        <span class='kw'>let</span> <span class='ident'>v</span> <span class='op'>=</span> [<span class='number'>1u8</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>, <span class='number'>5</span>, <span class='number'>6</span>, <span class='number'>7</span>, <span class='number'>8</span>];
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>w</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>8</span>];

        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>rng</span> <span class='op'>=</span> <span class='ident'>ReadRng</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='ident'>v</span>[..]);
        <span class='ident'>rng</span>.<span class='ident'>fill_bytes</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>w</span>);

        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>v</span> <span class='op'>==</span> <span class='ident'>w</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='attribute'>#[<span class='ident'>should_panic</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_reader_rng_insufficient_bytes</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>rng</span> <span class='op'>=</span> <span class='ident'>ReadRng</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span>[][..]);
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>v</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>3</span>];
        <span class='ident'>rng</span>.<span class='ident'>fill_bytes</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>v</span>);
    }
}
</pre>
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                    <dd>Show this help dialog</dd>
                    <dt>S</dt>
                    <dd>Focus the search field</dd>
                    <dt>&larrb;</dt>
                    <dd>Move up in search results</dd>
                    <dt>&rarrb;</dt>
                    <dd>Move down in search results</dd>
                    <dt>&#9166;</dt>
                    <dd>Go to active search result</dd>
                    <dt>+</dt>
                    <dd>Collapse/expand all sections</dd>
                </dl>
            </div>

            <div class="infos">
                <h2>Search Tricks</h2>

                <p>
                    Prefix searches with a type followed by a colon (e.g.
                    <code>fn:</code>) to restrict the search to a given type.
                </p>

                <p>
                    Accepted types are: <code>fn</code>, <code>mod</code>,
                    <code>struct</code>, <code>enum</code>,
                    <code>trait</code>, <code>type</code>, <code>macro</code>,
                    and <code>const</code>.
                </p>

                <p>
                    Search functions by type signature (e.g.
                    <code>vec -> usize</code> or <code>* -> vec</code>)
                </p>
            </div>
        </div>
    </aside>

    

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