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</pre><pre class='rust '>
<span class='comment'>// Copyright 2013 Jack Lloyd</span>
<span class='comment'>//</span>
<span class='comment'>// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span>
<span class='comment'>// you may not use this file except in compliance with the License.</span>
<span class='comment'>// You may obtain a copy of the License at</span>
<span class='comment'>//</span>
<span class='comment'>//     http://www.apache.org/licenses/LICENSE-2.0</span>
<span class='comment'>//</span>
<span class='comment'>// Unless required by applicable law or agreed to in writing, software</span>
<span class='comment'>// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span>
<span class='comment'>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class='comment'>// See the License for the specific language governing permissions and</span>
<span class='comment'>// limitations under the License.</span>
<span class='comment'>//</span>

<span class='kw'>use</span> <span class='ident'>libc</span>::{<span class='ident'>c_int</span>, <span class='ident'>c_uint</span>};
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>iter</span>::<span class='ident'>repeat</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>::<span class='ident'>prelude</span>::<span class='op'>*</span>;

<span class='kw'>use</span> <span class='ident'>crypto</span>::<span class='ident'>hash</span>::<span class='ident'>Type</span>;
<span class='kw'>use</span> <span class='ident'>ffi</span>;
<span class='kw'>use</span> <span class='ident'>ffi_extras</span>;

<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>PartialEq</span>, <span class='ident'>Copy</span>, <span class='ident'>Clone</span>)]</span>
<span class='kw'>enum</span> <span class='ident'>State</span> {
    <span class='ident'>Reset</span>,
    <span class='ident'>Updated</span>,
    <span class='ident'>Finalized</span>,
}

<span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>State</span>::<span class='op'>*</span>;

<span class='doccomment'>/// Provides HMAC computation.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// Calculate a HMAC in one go.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use openssl::crypto::hash::Type;</span>
<span class='doccomment'>/// use openssl::crypto::hmac::hmac;</span>
<span class='doccomment'>/// let key = b&quot;Jefe&quot;;</span>
<span class='doccomment'>/// let data = b&quot;what do ya want for nothing?&quot;;</span>
<span class='doccomment'>/// let spec = b&quot;\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38&quot;;</span>
<span class='doccomment'>/// let res = hmac(Type::MD5, key, data);</span>
<span class='doccomment'>/// assert_eq!(res, spec);</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// Use the `Write` trait to supply the input in chunks.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use std::io::prelude::*;</span>
<span class='doccomment'>/// use openssl::crypto::hash::Type;</span>
<span class='doccomment'>/// use openssl::crypto::hmac::HMAC;</span>
<span class='doccomment'>/// let key = b&quot;Jefe&quot;;</span>
<span class='doccomment'>/// let data: &amp;[&amp;[u8]] = &amp;[b&quot;what do ya &quot;, b&quot;want for nothing?&quot;];</span>
<span class='doccomment'>/// let spec = b&quot;\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38&quot;;</span>
<span class='doccomment'>/// let mut h = HMAC::new(Type::MD5, &amp;*key);</span>
<span class='doccomment'>/// h.write_all(data[0]);</span>
<span class='doccomment'>/// h.write_all(data[1]);</span>
<span class='doccomment'>/// let res = h.finish();</span>
<span class='doccomment'>/// assert_eq!(res, spec);</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>HMAC</span> {
    <span class='ident'>ctx</span>: <span class='ident'>ffi</span>::<span class='ident'>HMAC_CTX</span>,
    <span class='ident'>type_</span>: <span class='ident'>Type</span>,
    <span class='ident'>state</span>: <span class='ident'>State</span>,
}

<span class='kw'>impl</span> <span class='ident'>HMAC</span> {
    <span class='doccomment'>/// Creates a new `HMAC` with the specified hash type using the `key`.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>ty</span>: <span class='ident'>Type</span>, <span class='ident'>key</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='ident'>HMAC</span> {
        <span class='ident'>ffi</span>::<span class='ident'>init</span>();

        <span class='kw'>let</span> <span class='ident'>ctx</span> <span class='op'>=</span> <span class='kw'>unsafe</span> {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>ctx</span> <span class='op'>=</span> ::<span class='ident'>std</span>::<span class='ident'>mem</span>::<span class='ident'>uninitialized</span>();
            <span class='ident'>ffi</span>::<span class='ident'>HMAC_CTX_init</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>ctx</span>);
            <span class='ident'>ctx</span>
        };
        <span class='kw'>let</span> <span class='ident'>md</span> <span class='op'>=</span> <span class='ident'>ty</span>.<span class='ident'>evp_md</span>();

        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='ident'>HMAC</span> {
            <span class='ident'>ctx</span>: <span class='ident'>ctx</span>,
            <span class='ident'>type_</span>: <span class='ident'>ty</span>,
            <span class='ident'>state</span>: <span class='ident'>Finalized</span>,
        };
        <span class='ident'>h</span>.<span class='ident'>init_once</span>(<span class='ident'>md</span>, <span class='ident'>key</span>);
        <span class='ident'>h</span>
    }

    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>init_once</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>md</span>: <span class='op'>*</span><span class='kw'>const</span> <span class='ident'>ffi</span>::<span class='ident'>EVP_MD</span>, <span class='ident'>key</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) {
        <span class='kw'>unsafe</span> {
            <span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>ffi_extras</span>::<span class='ident'>HMAC_Init_ex</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>ctx</span>,
                                             <span class='ident'>key</span>.<span class='ident'>as_ptr</span>(),
                                             <span class='ident'>key</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>c_int</span>,
                                             <span class='ident'>md</span>,
                                             <span class='number'>0</span> <span class='kw'>as</span> <span class='op'>*</span><span class='kw'>const</span> _);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>r</span>, <span class='number'>1</span>);
        }
        <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>=</span> <span class='ident'>Reset</span>;
    }

    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>init</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) {
        <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>state</span> {
            <span class='ident'>Reset</span> <span class='op'>=&gt;</span> <span class='kw'>return</span>,
            <span class='ident'>Updated</span> <span class='op'>=&gt;</span> {
                <span class='self'>self</span>.<span class='ident'>finalize</span>();
            }
            <span class='ident'>Finalized</span> <span class='op'>=&gt;</span> (),
        }
        <span class='comment'>// If the key and/or md is not supplied it&#39;s reused from the last time</span>
        <span class='comment'>// avoiding redundant initializations</span>
        <span class='kw'>unsafe</span> {
            <span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>ffi_extras</span>::<span class='ident'>HMAC_Init_ex</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>ctx</span>,
                                             <span class='number'>0</span> <span class='kw'>as</span> <span class='op'>*</span><span class='kw'>const</span> _,
                                             <span class='number'>0</span>,
                                             <span class='number'>0</span> <span class='kw'>as</span> <span class='op'>*</span><span class='kw'>const</span> _,
                                             <span class='number'>0</span> <span class='kw'>as</span> <span class='op'>*</span><span class='kw'>const</span> _);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>r</span>, <span class='number'>1</span>);
        }
        <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>=</span> <span class='ident'>Reset</span>;
    }

    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>update</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>data</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) {
        <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>==</span> <span class='ident'>Finalized</span> {
            <span class='self'>self</span>.<span class='ident'>init</span>();
        }
        <span class='kw'>unsafe</span> {
            <span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>ffi_extras</span>::<span class='ident'>HMAC_Update</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>ctx</span>, <span class='ident'>data</span>.<span class='ident'>as_ptr</span>(), <span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>c_uint</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>r</span>, <span class='number'>1</span>);
        }
        <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>=</span> <span class='ident'>Updated</span>;
    }

    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>finalize</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'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> {
        <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>==</span> <span class='ident'>Finalized</span> {
            <span class='self'>self</span>.<span class='ident'>init</span>();
        }
        <span class='kw'>let</span> <span class='ident'>md_len</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>type_</span>.<span class='ident'>md_len</span>();
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>res</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='ident'>md_len</span>).<span class='ident'>collect</span>();
        <span class='kw'>unsafe</span> {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>len</span> <span class='op'>=</span> <span class='number'>0</span>;
            <span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>ffi_extras</span>::<span class='ident'>HMAC_Final</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>ctx</span>, <span class='ident'>res</span>.<span class='ident'>as_mut_ptr</span>(), <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>len</span>);
            <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>=</span> <span class='ident'>Finalized</span>;
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>len</span> <span class='kw'>as</span> <span class='ident'>usize</span>, <span class='ident'>md_len</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>r</span>, <span class='number'>1</span>);
        }
        <span class='ident'>res</span>
    }

    <span class='doccomment'>/// Returns the hash of the data written since creation or</span>
    <span class='doccomment'>/// the last `finish` and resets the hasher.</span>
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>finish</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'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> {
        <span class='self'>self</span>.<span class='ident'>finalize</span>()
    }
}

<span class='kw'>impl</span> <span class='ident'>Write</span> <span class='kw'>for</span> <span class='ident'>HMAC</span> {
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>write</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>buf</span>: <span class='kw-2'>&amp;</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='ident'>usize</span><span class='op'>&gt;</span> {
        <span class='self'>self</span>.<span class='ident'>update</span>(<span class='ident'>buf</span>);
        <span class='prelude-val'>Ok</span>(<span class='ident'>buf</span>.<span class='ident'>len</span>())
    }

    <span class='kw'>fn</span> <span class='ident'>flush</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'>io</span>::<span class='prelude-ty'>Result</span><span class='op'>&lt;</span>()<span class='op'>&gt;</span> {
        <span class='prelude-val'>Ok</span>(())
    }
}

<span class='kw'>impl</span> <span class='ident'>Clone</span> <span class='kw'>for</span> <span class='ident'>HMAC</span> {
    <span class='kw'>fn</span> <span class='ident'>clone</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HMAC</span> {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>ctx</span>: <span class='ident'>ffi</span>::<span class='ident'>HMAC_CTX</span>;
        <span class='kw'>unsafe</span> {
            <span class='ident'>ctx</span> <span class='op'>=</span> ::<span class='ident'>std</span>::<span class='ident'>mem</span>::<span class='ident'>uninitialized</span>();
            <span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>ffi_extras</span>::<span class='ident'>HMAC_CTX_copy</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>ctx</span>, <span class='kw-2'>&amp;</span><span class='self'>self</span>.<span class='ident'>ctx</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>r</span>, <span class='number'>1</span>);
        }
        <span class='ident'>HMAC</span> {
            <span class='ident'>ctx</span>: <span class='ident'>ctx</span>,
            <span class='ident'>type_</span>: <span class='self'>self</span>.<span class='ident'>type_</span>,
            <span class='ident'>state</span>: <span class='self'>self</span>.<span class='ident'>state</span>,
        }
    }
}

<span class='kw'>impl</span> <span class='ident'>Drop</span> <span class='kw'>for</span> <span class='ident'>HMAC</span> {
    <span class='kw'>fn</span> <span class='ident'>drop</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) {
        <span class='kw'>unsafe</span> {
            <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>state</span> <span class='op'>!=</span> <span class='ident'>Finalized</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='self'>self</span>.<span class='ident'>type_</span>.<span class='ident'>md_len</span>()).<span class='ident'>collect</span>();
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>len</span> <span class='op'>=</span> <span class='number'>0</span>;
                <span class='ident'>ffi_extras</span>::<span class='ident'>HMAC_Final</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>ctx</span>, <span class='ident'>buf</span>.<span class='ident'>as_mut_ptr</span>(), <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>len</span>);
            }
            <span class='ident'>ffi</span>::<span class='ident'>HMAC_CTX_cleanup</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>ctx</span>);
        }
    }
}

<span class='doccomment'>/// Computes the HMAC of the `data` with the hash `t` and `key`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>hmac</span>(<span class='ident'>t</span>: <span class='ident'>Type</span>, <span class='ident'>key</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='ident'>data</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> {
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='ident'>HMAC</span>::<span class='ident'>new</span>(<span class='ident'>t</span>, <span class='ident'>key</span>);
    <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h</span>.<span class='ident'>write_all</span>(<span class='ident'>data</span>);
    <span class='ident'>h</span>.<span class='ident'>finish</span>()
}

<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span>
<span class='kw'>mod</span> <span class='ident'>tests</span> {
    <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>iter</span>::<span class='ident'>repeat</span>;
    <span class='kw'>use</span> <span class='ident'>serialize</span>::<span class='ident'>hex</span>::<span class='ident'>FromHex</span>;
    <span class='kw'>use</span> <span class='ident'>crypto</span>::<span class='ident'>hash</span>::<span class='ident'>Type</span>;
    <span class='kw'>use</span> <span class='ident'>crypto</span>::<span class='ident'>hash</span>::<span class='ident'>Type</span>::<span class='op'>*</span>;
    <span class='kw'>use</span> <span class='kw'>super</span>::{<span class='ident'>hmac</span>, <span class='ident'>HMAC</span>};
    <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>::<span class='ident'>prelude</span>::<span class='op'>*</span>;

    <span class='kw'>fn</span> <span class='ident'>test_hmac</span>(<span class='ident'>ty</span>: <span class='ident'>Type</span>, <span class='ident'>tests</span>: <span class='kw-2'>&amp;</span>[(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>)]) {
        <span class='kw'>for</span> <span class='kw-2'>&amp;</span>(<span class='kw-2'>ref</span> <span class='ident'>key</span>, <span class='kw-2'>ref</span> <span class='ident'>data</span>, <span class='kw-2'>ref</span> <span class='ident'>res</span>) <span class='kw'>in</span> <span class='ident'>tests</span>.<span class='ident'>iter</span>() {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>hmac</span>(<span class='ident'>ty</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='op'>*</span><span class='ident'>key</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='op'>*</span><span class='ident'>data</span>), <span class='op'>*</span><span class='ident'>res</span>);
        }
    }

    <span class='kw'>fn</span> <span class='ident'>test_hmac_recycle</span>(<span class='ident'>h</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>HMAC</span>, <span class='ident'>test</span>: <span class='kw-2'>&amp;</span>(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>)) {
        <span class='kw'>let</span> <span class='kw-2'>&amp;</span>(_, <span class='kw-2'>ref</span> <span class='ident'>data</span>, <span class='kw-2'>ref</span> <span class='ident'>res</span>) <span class='op'>=</span> <span class='ident'>test</span>;
        <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h</span>.<span class='ident'>write_all</span>(<span class='kw-2'>&amp;</span><span class='op'>*</span><span class='op'>*</span><span class='ident'>data</span>);
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h</span>.<span class='ident'>finish</span>(), <span class='op'>*</span><span class='ident'>res</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_md5</span>() {
        <span class='comment'>// test vectors from RFC 2202</span>
        <span class='kw'>let</span> <span class='ident'>tests</span>: [(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>); <span class='number'>7</span>] <span class='op'>=</span>
            [(<span class='ident'>repeat</span>(<span class='number'>0x0b_u8</span>).<span class='ident'>take</span>(<span class='number'>16</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Hi There&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;9294727a3638bb1c13f48ef8158bfc9d&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='string'>b&quot;Jefe&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>b&quot;what do ya want for nothing?&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;750c783e6ab0b503eaa86e310a5db738&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>16</span>).<span class='ident'>collect</span>(),
              <span class='ident'>repeat</span>(<span class='number'>0xdd_u8</span>).<span class='ident'>take</span>(<span class='number'>50</span>).<span class='ident'>collect</span>(),
              <span class='string'>&quot;56be34521d144c88dbb8c733f0e8b3f6&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='string'>&quot;0102030405060708090a0b0c0d0e0f10111213141516171819&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>(),
              <span class='ident'>repeat</span>(<span class='number'>0xcd_u8</span>).<span class='ident'>take</span>(<span class='number'>50</span>).<span class='ident'>collect</span>(),
              <span class='string'>&quot;697eaf0aca3a3aea3a75164746ffaa79&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0x0c_u8</span>).<span class='ident'>take</span>(<span class='number'>16</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test With Truncation&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;56461ef2342edc00f9bab995690efd4c&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key \
               and Larger Than One Block-Size Data&quot;</span>
                  .<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;6f630fad67cda0ee1fb1f562db3aa53e&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>())];

        <span class='ident'>test_hmac</span>(<span class='ident'>MD5</span>, <span class='kw-2'>&amp;</span><span class='ident'>tests</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_md5_recycle</span>() {
        <span class='kw'>let</span> <span class='ident'>tests</span>: [(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>); <span class='number'>2</span>] <span class='op'>=</span>
            [(<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key \
               and Larger Than One Block-Size Data&quot;</span>
                  .<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;6f630fad67cda0ee1fb1f562db3aa53e&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>())];

        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='ident'>HMAC</span>::<span class='ident'>new</span>(<span class='ident'>MD5</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>0</span>);
        <span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>100usize</span> {
            <span class='kw'>let</span> <span class='ident'>test</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>tests</span>[<span class='ident'>i</span> <span class='op'>%</span> <span class='number'>2</span>];
            <span class='ident'>test_hmac_recycle</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>h</span>, <span class='ident'>test</span>);
        }
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_finish_twice</span>() {
        <span class='kw'>let</span> <span class='ident'>test</span>: (<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>) <span class='op'>=</span>
            (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
             <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>(),
             <span class='string'>&quot;6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>());

        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='ident'>HMAC</span>::<span class='ident'>new</span>(<span class='ident'>Type</span>::<span class='ident'>MD5</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>test</span>.<span class='number'>0</span>);
        <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h</span>.<span class='ident'>write_all</span>(<span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>test</span>.<span class='number'>1</span>);
        <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h</span>.<span class='ident'>finish</span>();
        <span class='kw'>let</span> <span class='ident'>res</span> <span class='op'>=</span> <span class='ident'>h</span>.<span class='ident'>finish</span>();
        <span class='kw'>let</span> <span class='ident'>null</span> <span class='op'>=</span> <span class='ident'>hmac</span>(<span class='ident'>Type</span>::<span class='ident'>MD5</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>test</span>.<span class='number'>0</span>, <span class='kw-2'>&amp;</span>[]);
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>res</span>, <span class='ident'>null</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_clone</span>() {
        <span class='kw'>let</span> <span class='ident'>tests</span>: [(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>); <span class='number'>2</span>] <span class='op'>=</span>
            [(<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key \
               and Larger Than One Block-Size Data&quot;</span>
                  .<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;6f630fad67cda0ee1fb1f562db3aa53e&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>())];
        <span class='kw'>let</span> <span class='ident'>p</span> <span class='op'>=</span> <span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>0</span>.<span class='ident'>len</span>() <span class='op'>/</span> <span class='number'>2</span>;
        <span class='kw'>let</span> <span class='ident'>h0</span> <span class='op'>=</span> <span class='ident'>HMAC</span>::<span class='ident'>new</span>(<span class='ident'>Type</span>::<span class='ident'>MD5</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>0</span>);

        <span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;Clone a new hmac&quot;</span>);
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h1</span> <span class='op'>=</span> <span class='ident'>h0</span>.<span class='ident'>clone</span>();
        <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h1</span>.<span class='ident'>write_all</span>(<span class='kw-2'>&amp;</span><span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>1</span>[..<span class='ident'>p</span>]);
        {
            <span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;Clone an updated hmac&quot;</span>);
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h2</span> <span class='op'>=</span> <span class='ident'>h1</span>.<span class='ident'>clone</span>();
            <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h2</span>.<span class='ident'>write_all</span>(<span class='kw-2'>&amp;</span><span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>1</span>[<span class='ident'>p</span>..]);
            <span class='kw'>let</span> <span class='ident'>res</span> <span class='op'>=</span> <span class='ident'>h2</span>.<span class='ident'>finish</span>();
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>res</span>, <span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>2</span>);
        }
        <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h1</span>.<span class='ident'>write_all</span>(<span class='kw-2'>&amp;</span><span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>1</span>[<span class='ident'>p</span>..]);
        <span class='kw'>let</span> <span class='ident'>res</span> <span class='op'>=</span> <span class='ident'>h1</span>.<span class='ident'>finish</span>();
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>res</span>, <span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>2</span>);

        <span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;Clone a finished hmac&quot;</span>);
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h3</span> <span class='op'>=</span> <span class='ident'>h1</span>.<span class='ident'>clone</span>();
        <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>h3</span>.<span class='ident'>write_all</span>(<span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>tests</span>[<span class='number'>1</span>].<span class='number'>1</span>);
        <span class='kw'>let</span> <span class='ident'>res</span> <span class='op'>=</span> <span class='ident'>h3</span>.<span class='ident'>finish</span>();
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>res</span>, <span class='ident'>tests</span>[<span class='number'>1</span>].<span class='number'>2</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_sha1</span>() {
        <span class='comment'>// test vectors from RFC 2202</span>
        <span class='kw'>let</span> <span class='ident'>tests</span>: [(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>); <span class='number'>7</span>] <span class='op'>=</span>
            [(<span class='ident'>repeat</span>(<span class='number'>0x0b_u8</span>).<span class='ident'>take</span>(<span class='number'>20</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Hi There&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;b617318655057264e28bc0b6fb378c8ef146be00&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='string'>b&quot;Jefe&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>b&quot;what do ya want for nothing?&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;effcdf6ae5eb2fa2d27416d5f184df9c259a7c79&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>20</span>).<span class='ident'>collect</span>(),
              <span class='ident'>repeat</span>(<span class='number'>0xdd_u8</span>).<span class='ident'>take</span>(<span class='number'>50</span>).<span class='ident'>collect</span>(),
              <span class='string'>&quot;125d7342b9ac11cd91a39af48aa17b4f63f175d3&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='string'>&quot;0102030405060708090a0b0c0d0e0f10111213141516171819&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>(),
              <span class='ident'>repeat</span>(<span class='number'>0xcd_u8</span>).<span class='ident'>take</span>(<span class='number'>50</span>).<span class='ident'>collect</span>(),
              <span class='string'>&quot;4c9007f4026250c6bc8414f9bf50c86c2d7235da&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0x0c_u8</span>).<span class='ident'>take</span>(<span class='number'>20</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test With Truncation&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;4c1a03424b55e07fe7f27be1d58bb9324a9a5a04&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;aa4ae5e15272d00e95705637ce8a3b55ed402112&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key \
               and Larger Than One Block-Size Data&quot;</span>
                  .<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;e8e99d0f45237d786d6bbaa7965c7808bbff1a91&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>())];

        <span class='ident'>test_hmac</span>(<span class='ident'>SHA1</span>, <span class='kw-2'>&amp;</span><span class='ident'>tests</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_sha1_recycle</span>() {
        <span class='kw'>let</span> <span class='ident'>tests</span>: [(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>); <span class='number'>2</span>] <span class='op'>=</span>
            [(<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;aa4ae5e15272d00e95705637ce8a3b55ed402112&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>80</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key \
               and Larger Than One Block-Size Data&quot;</span>
                  .<span class='ident'>to_vec</span>(),
              <span class='string'>&quot;e8e99d0f45237d786d6bbaa7965c7808bbff1a91&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>())];

        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='ident'>HMAC</span>::<span class='ident'>new</span>(<span class='ident'>SHA1</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>tests</span>[<span class='number'>0</span>].<span class='number'>0</span>);
        <span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>100usize</span> {
            <span class='kw'>let</span> <span class='ident'>test</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>tests</span>[<span class='ident'>i</span> <span class='op'>%</span> <span class='number'>2</span>];
            <span class='ident'>test_hmac_recycle</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>h</span>, <span class='ident'>test</span>);
        }
    }



    <span class='kw'>fn</span> <span class='ident'>test_sha2</span>(<span class='ident'>ty</span>: <span class='ident'>Type</span>, <span class='ident'>results</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>]) {
        <span class='comment'>// test vectors from RFC 4231</span>
        <span class='kw'>let</span> <span class='ident'>tests</span>: [(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>); <span class='number'>6</span>] <span class='op'>=</span>
            [(<span class='ident'>repeat</span>(<span class='number'>0xb_u8</span>).<span class='ident'>take</span>(<span class='number'>20</span>).<span class='ident'>collect</span>(), <span class='string'>b&quot;Hi There&quot;</span>.<span class='ident'>to_vec</span>()),
             (<span class='string'>b&quot;Jefe&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;what do ya want for nothing?&quot;</span>.<span class='ident'>to_vec</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>20</span>).<span class='ident'>collect</span>(), <span class='ident'>repeat</span>(<span class='number'>0xdd_u8</span>).<span class='ident'>take</span>(<span class='number'>50</span>).<span class='ident'>collect</span>()),
             (<span class='string'>&quot;0102030405060708090a0b0c0d0e0f10111213141516171819&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>(),
              <span class='ident'>repeat</span>(<span class='number'>0xcd_u8</span>).<span class='ident'>take</span>(<span class='number'>50</span>).<span class='ident'>collect</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>131</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;Test Using Larger Than Block-Size Key - Hash Key First&quot;</span>.<span class='ident'>to_vec</span>()),
             (<span class='ident'>repeat</span>(<span class='number'>0xaa_u8</span>).<span class='ident'>take</span>(<span class='number'>131</span>).<span class='ident'>collect</span>(),
              <span class='string'>b&quot;This is a test using a larger than block-size key and a \
               larger than block-size data. The key needs to be hashed \
               before being used by the HMAC algorithm.&quot;</span>
                  .<span class='ident'>to_vec</span>())];

        <span class='kw'>for</span> (<span class='kw-2'>&amp;</span>(<span class='kw-2'>ref</span> <span class='ident'>key</span>, <span class='kw-2'>ref</span> <span class='ident'>data</span>), <span class='ident'>res</span>) <span class='kw'>in</span> <span class='ident'>tests</span>.<span class='ident'>iter</span>().<span class='ident'>zip</span>(<span class='ident'>results</span>.<span class='ident'>iter</span>()) {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>hmac</span>(<span class='ident'>ty</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='op'>*</span><span class='ident'>key</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='op'>*</span><span class='ident'>data</span>), <span class='op'>*</span><span class='ident'>res</span>);
        }

        <span class='comment'>// recycle test</span>
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='ident'>HMAC</span>::<span class='ident'>new</span>(<span class='ident'>ty</span>, <span class='kw-2'>&amp;</span><span class='op'>*</span><span class='ident'>tests</span>[<span class='number'>5</span>].<span class='number'>0</span>);
        <span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>100usize</span> {
            <span class='kw'>let</span> <span class='ident'>test</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>tests</span>[<span class='number'>4</span> <span class='op'>+</span> <span class='ident'>i</span> <span class='op'>%</span> <span class='number'>2</span>];
            <span class='kw'>let</span> <span class='ident'>tup</span> <span class='op'>=</span> (<span class='ident'>test</span>.<span class='number'>0</span>.<span class='ident'>clone</span>(), <span class='ident'>test</span>.<span class='number'>1</span>.<span class='ident'>clone</span>(), <span class='ident'>results</span>[<span class='number'>4</span> <span class='op'>+</span> <span class='ident'>i</span> <span class='op'>%</span> <span class='number'>2</span>].<span class='ident'>clone</span>());
            <span class='ident'>test_hmac_recycle</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>h</span>, <span class='kw-2'>&amp;</span><span class='ident'>tup</span>);
        }
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_sha224</span>() {
        <span class='kw'>let</span> <span class='ident'>results</span> <span class='op'>=</span> [<span class='string'>&quot;896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;a30e01098bc6dbbf45690f3a7e9e6d0f8bbea2a39e6148008fd05e44&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;7fb3cb3588c6c1f6ffa9694d7d6ad2649365b0c1f65d69d1ec8333ea&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;6c11506874013cac6a2abc1bb382627cec6a90d86efc012de7afec5a&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;95e9a0db962095adaebe9b2d6f0dbce2d499f112f2d2b7273fa6870e&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;3a854166ac5d9f023f54d517d0b39dbd946770db9c2b95c9f6f565d1&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>()];
        <span class='ident'>test_sha2</span>(<span class='ident'>SHA224</span>, <span class='kw-2'>&amp;</span><span class='ident'>results</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_sha256</span>() {
        <span class='kw'>let</span> <span class='ident'>results</span> <span class='op'>=</span> [<span class='string'>&quot;b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f51535c3a35e2&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>()];
        <span class='ident'>test_sha2</span>(<span class='ident'>SHA256</span>, <span class='kw-2'>&amp;</span><span class='ident'>results</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_sha384</span>() {
        <span class='kw'>let</span> <span class='ident'>results</span> <span class='op'>=</span> [<span class='string'>&quot;afd03944d84895626b0825f4ab46907f15f9dadbe4101ec682aa034c7cebc59cfaea9ea90\
                        76ede7f4af152e8b2fa9cb6&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;af45d2e376484031617f78d2b58a6b1b9c7ef464f5a01b47e42ec3736322445e8e2240ca5\
                        e69e2c78b3239ecfab21649&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;88062608d3e6ad8a0aa2ace014c8a86f0aa635d947ac9febe83ef4e55966144b2a5ab39dc\
                        13814b94e3ab6e101a34f27&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;3e8a69b7783c25851933ab6290af6ca77a9981480850009cc5577c6e1f573b4e6801dd23c\
                        4a7d679ccf8a386c674cffb&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;4ece084485813e9088d2c63a041bc5b44f9ef1012a2b588f3cd11f05033ac4c60c2ef6ab4\
                        030fe8296248df163f44952&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;6617178e941f020d351e2f254e8fd32c602420feb0b8fb9adccebb82461e99c5a678cc31e\
                        799176d3860e6110c46523e&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>()];
        <span class='ident'>test_sha2</span>(<span class='ident'>SHA384</span>, <span class='kw-2'>&amp;</span><span class='ident'>results</span>);
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_hmac_sha512</span>() {
        <span class='kw'>let</span> <span class='ident'>results</span> <span class='op'>=</span> [<span class='string'>&quot;87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b30545e17cdedaa833b7d\
                        6b8a702038b274eaea3f4e4be9d914eeb61f1702e696c203a126854&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7ea2505549758bf75c\
                        05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b636e070a38bce737&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33b2279d39bf3e84827\
                        9a722c806b485a47e67c807b946a337bee8942674278859e13292fb&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050361ee3dba91ca5c11\
                        aa25eb4d679275cc5788063a5f19741120c4f2de2adebeb10a298dd&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b013783f8f3526b56d037e\
                        05f2598bd0fd2215d6a1e5295e64f73f63f0aec8b915a985d786598&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>(),
                       <span class='string'>&quot;e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d20cdc944b6022cac3\
                        c4982b10d5eeb55c3e4de15134676fb6de0446065c97440fa8c6a58&quot;</span>
                           .<span class='ident'>from_hex</span>()
                           .<span class='ident'>unwrap</span>()];
        <span class='ident'>test_sha2</span>(<span class='ident'>SHA512</span>, <span class='kw-2'>&amp;</span><span class='ident'>results</span>);
    }
}
</pre>
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