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</pre><pre class='rust '>
<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, 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'>//! This module implements the HMAC-based Extract-and-Expand Key</span>
<span class='doccomment'>//! Derivation Function as specified by https://tools.ietf.org/html/rfc5869.</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'>cryptoutil</span>::<span class='ident'>copy_memory</span>;
<span class='kw'>use</span> <span class='ident'>digest</span>::<span class='ident'>Digest</span>;
<span class='kw'>use</span> <span class='ident'>hmac</span>::<span class='ident'>Hmac</span>;
<span class='kw'>use</span> <span class='ident'>mac</span>::<span class='ident'>Mac</span>;
<span class='doccomment'>/// Execute the HKDF-Extract function. Applications MUST NOT use this for</span>
<span class='doccomment'>/// password hashing.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Arguments</span>
<span class='doccomment'>/// * digest - The digest function to use.</span>
<span class='doccomment'>/// * salt - The optional salt value (a non-secret random value) to use.</span>
<span class='doccomment'>/// * ikm - The input keying material to use.</span>
<span class='doccomment'>/// * prk - The output buffer to fill with a digest.output_bytes() length</span>
<span class='doccomment'>/// pseudo random key.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>hkdf_extract</span><span class='op'><</span><span class='ident'>D</span>: <span class='ident'>Digest</span><span class='op'>></span>(<span class='kw-2'>mut</span> <span class='ident'>digest</span>: <span class='ident'>D</span>, <span class='ident'>salt</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>ikm</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>prk</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) {
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>prk</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='ident'>digest</span>.<span class='ident'>output_bytes</span>());
<span class='ident'>digest</span>.<span class='ident'>reset</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>mac</span> <span class='op'>=</span> <span class='ident'>Hmac</span>::<span class='ident'>new</span>(<span class='ident'>digest</span>, <span class='ident'>salt</span>);
<span class='ident'>mac</span>.<span class='ident'>input</span>(<span class='ident'>ikm</span>);
<span class='ident'>mac</span>.<span class='ident'>raw_result</span>(<span class='ident'>prk</span>);
<span class='ident'>mac</span>.<span class='ident'>reset</span>();
}
<span class='doccomment'>/// Execute the HKDF-Expand function. Applications MUST NOT use this for</span>
<span class='doccomment'>/// password hashing.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Arguments</span>
<span class='doccomment'>/// * digest - The digest function to use.</span>
<span class='doccomment'>/// * prk - The pseudorandom key of at least digest.output_bytes() octets.</span>
<span class='doccomment'>/// * info - The optional context and application specific information to use.</span>
<span class='doccomment'>/// * okm - The output buffer to fill with the derived key value.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>hkdf_expand</span><span class='op'><</span><span class='ident'>D</span>: <span class='ident'>Digest</span><span class='op'>></span>(<span class='kw-2'>mut</span> <span class='ident'>digest</span>: <span class='ident'>D</span>, <span class='ident'>prk</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>info</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>okm</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) {
<span class='ident'>digest</span>.<span class='ident'>reset</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>mac</span> <span class='op'>=</span> <span class='ident'>Hmac</span>::<span class='ident'>new</span>(<span class='ident'>digest</span>, <span class='ident'>prk</span>);
<span class='kw'>let</span> <span class='ident'>os</span> <span class='op'>=</span> <span class='ident'>mac</span>.<span class='ident'>output_bytes</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>t</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='ident'>os</span>).<span class='ident'>collect</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>n</span>: <span class='ident'>u8</span> <span class='op'>=</span> <span class='number'>0</span>;
<span class='kw'>for</span> <span class='ident'>chunk</span> <span class='kw'>in</span> <span class='ident'>okm</span>.<span class='ident'>chunks_mut</span>(<span class='ident'>os</span>) {
<span class='comment'>// The block index starts at 1. So, this is supposed to run on the first execution.</span>
<span class='ident'>n</span> <span class='op'>=</span> <span class='ident'>n</span>.<span class='ident'>checked_add</span>(<span class='number'>1</span>).<span class='ident'>expect</span>(<span class='string'>"HKDF size limit exceeded."</span>);
<span class='kw'>if</span> <span class='ident'>n</span> <span class='op'>!=</span> <span class='number'>1</span> {
<span class='ident'>mac</span>.<span class='ident'>input</span>(<span class='kw-2'>&</span><span class='ident'>t</span>[..]);
}
<span class='kw'>let</span> <span class='ident'>nbuf</span> <span class='op'>=</span> [<span class='ident'>n</span>];
<span class='ident'>mac</span>.<span class='ident'>input</span>(<span class='ident'>info</span>);
<span class='ident'>mac</span>.<span class='ident'>input</span>(<span class='kw-2'>&</span><span class='ident'>nbuf</span>);
<span class='ident'>mac</span>.<span class='ident'>raw_result</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>t</span>);
<span class='ident'>mac</span>.<span class='ident'>reset</span>();
<span class='kw'>let</span> <span class='ident'>chunk_len</span> <span class='op'>=</span> <span class='ident'>chunk</span>.<span class='ident'>len</span>();
<span class='ident'>copy_memory</span>(<span class='kw-2'>&</span><span class='ident'>t</span>[..<span class='ident'>chunk_len</span>], <span class='ident'>chunk</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='ident'>std</span>::<span class='ident'>iter</span>::<span class='ident'>repeat</span>;
<span class='kw'>use</span> <span class='ident'>digest</span>::<span class='ident'>Digest</span>;
<span class='kw'>use</span> <span class='ident'>sha1</span>::<span class='ident'>Sha1</span>;
<span class='kw'>use</span> <span class='ident'>sha2</span>::<span class='ident'>Sha256</span>;
<span class='kw'>use</span> <span class='ident'>hkdf</span>::{<span class='ident'>hkdf_extract</span>, <span class='ident'>hkdf_expand</span>};
<span class='kw'>struct</span> <span class='ident'>TestVector</span><span class='op'><</span><span class='ident'>D</span>: <span class='ident'>Digest</span><span class='op'>></span>{
<span class='ident'>digest</span>: <span class='ident'>D</span>,
<span class='ident'>ikm</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>salt</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>info</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>l</span>: <span class='ident'>usize</span>,
<span class='ident'>prk</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>okm</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>test_hkdf_rfc5869_sha256_vectors</span>() {
<span class='kw'>let</span> <span class='ident'>test_vectors</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>(
<span class='ident'>TestVector</span>{
<span class='ident'>digest</span>: <span class='ident'>Sha256</span>::<span class='ident'>new</span>(),
<span class='ident'>ikm</span>: <span class='ident'>repeat</span>(<span class='number'>0x0b</span>).<span class='ident'>take</span>(<span class='number'>22</span>).<span class='ident'>collect</span>(),
<span class='ident'>salt</span>: (<span class='number'>0x00</span>..<span class='number'>0x0c</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>info</span>: (<span class='number'>0xf0</span>..<span class='number'>0xf9</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>l</span>: <span class='number'>42</span>,
<span class='ident'>prk</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x07</span>, <span class='number'>0x77</span>, <span class='number'>0x09</span>, <span class='number'>0x36</span>, <span class='number'>0x2c</span>, <span class='number'>0x2e</span>, <span class='number'>0x32</span>, <span class='number'>0xdf</span>,
<span class='number'>0x0d</span>, <span class='number'>0xdc</span>, <span class='number'>0x3f</span>, <span class='number'>0x0d</span>, <span class='number'>0xc4</span>, <span class='number'>0x7b</span>, <span class='number'>0xba</span>, <span class='number'>0x63</span>,
<span class='number'>0x90</span>, <span class='number'>0xb6</span>, <span class='number'>0xc7</span>, <span class='number'>0x3b</span>, <span class='number'>0xb5</span>, <span class='number'>0x0f</span>, <span class='number'>0x9c</span>, <span class='number'>0x31</span>,
<span class='number'>0x22</span>, <span class='number'>0xec</span>, <span class='number'>0x84</span>, <span class='number'>0x4a</span>, <span class='number'>0xd7</span>, <span class='number'>0xc2</span>, <span class='number'>0xb3</span>, <span class='number'>0xe5</span> ],
<span class='ident'>okm</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x3c</span>, <span class='number'>0xb2</span>, <span class='number'>0x5f</span>, <span class='number'>0x25</span>, <span class='number'>0xfa</span>, <span class='number'>0xac</span>, <span class='number'>0xd5</span>, <span class='number'>0x7a</span>,
<span class='number'>0x90</span>, <span class='number'>0x43</span>, <span class='number'>0x4f</span>, <span class='number'>0x64</span>, <span class='number'>0xd0</span>, <span class='number'>0x36</span>, <span class='number'>0x2f</span>, <span class='number'>0x2a</span>,
<span class='number'>0x2d</span>, <span class='number'>0x2d</span>, <span class='number'>0x0a</span>, <span class='number'>0x90</span>, <span class='number'>0xcf</span>, <span class='number'>0x1a</span>, <span class='number'>0x5a</span>, <span class='number'>0x4c</span>,
<span class='number'>0x5d</span>, <span class='number'>0xb0</span>, <span class='number'>0x2d</span>, <span class='number'>0x56</span>, <span class='number'>0xec</span>, <span class='number'>0xc4</span>, <span class='number'>0xc5</span>, <span class='number'>0xbf</span>,
<span class='number'>0x34</span>, <span class='number'>0x00</span>, <span class='number'>0x72</span>, <span class='number'>0x08</span>, <span class='number'>0xd5</span>, <span class='number'>0xb8</span>, <span class='number'>0x87</span>, <span class='number'>0x18</span>,
<span class='number'>0x58</span>, <span class='number'>0x65</span> ],
},
<span class='ident'>TestVector</span>{
<span class='ident'>digest</span>: <span class='ident'>Sha256</span>::<span class='ident'>new</span>(),
<span class='ident'>ikm</span>: (<span class='number'>0x00</span>..<span class='number'>0x4f</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>salt</span>: (<span class='number'>0x60</span>..<span class='number'>0xaf</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>info</span>: (<span class='number'>0xb0</span>..<span class='number'>0xff</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span> <span class='kw'>as</span> <span class='ident'>u8</span>).<span class='ident'>collect</span>(),
<span class='ident'>l</span>: <span class='number'>82</span>,
<span class='ident'>prk</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x06</span>, <span class='number'>0xa6</span>, <span class='number'>0xb8</span>, <span class='number'>0x8c</span>, <span class='number'>0x58</span>, <span class='number'>0x53</span>, <span class='number'>0x36</span>, <span class='number'>0x1a</span>,
<span class='number'>0x06</span>, <span class='number'>0x10</span>, <span class='number'>0x4c</span>, <span class='number'>0x9c</span>, <span class='number'>0xeb</span>, <span class='number'>0x35</span>, <span class='number'>0xb4</span>, <span class='number'>0x5c</span>,
<span class='number'>0xef</span>, <span class='number'>0x76</span>, <span class='number'>0x00</span>, <span class='number'>0x14</span>, <span class='number'>0x90</span>, <span class='number'>0x46</span>, <span class='number'>0x71</span>, <span class='number'>0x01</span>,
<span class='number'>0x4a</span>, <span class='number'>0x19</span>, <span class='number'>0x3f</span>, <span class='number'>0x40</span>, <span class='number'>0xc1</span>, <span class='number'>0x5f</span>, <span class='number'>0xc2</span>, <span class='number'>0x44</span> ],
<span class='ident'>okm</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0xb1</span>, <span class='number'>0x1e</span>, <span class='number'>0x39</span>, <span class='number'>0x8d</span>, <span class='number'>0xc8</span>, <span class='number'>0x03</span>, <span class='number'>0x27</span>, <span class='number'>0xa1</span>,
<span class='number'>0xc8</span>, <span class='number'>0xe7</span>, <span class='number'>0xf7</span>, <span class='number'>0x8c</span>, <span class='number'>0x59</span>, <span class='number'>0x6a</span>, <span class='number'>0x49</span>, <span class='number'>0x34</span>,
<span class='number'>0x4f</span>, <span class='number'>0x01</span>, <span class='number'>0x2e</span>, <span class='number'>0xda</span>, <span class='number'>0x2d</span>, <span class='number'>0x4e</span>, <span class='number'>0xfa</span>, <span class='number'>0xd8</span>,
<span class='number'>0xa0</span>, <span class='number'>0x50</span>, <span class='number'>0xcc</span>, <span class='number'>0x4c</span>, <span class='number'>0x19</span>, <span class='number'>0xaf</span>, <span class='number'>0xa9</span>, <span class='number'>0x7c</span>,
<span class='number'>0x59</span>, <span class='number'>0x04</span>, <span class='number'>0x5a</span>, <span class='number'>0x99</span>, <span class='number'>0xca</span>, <span class='number'>0xc7</span>, <span class='number'>0x82</span>, <span class='number'>0x72</span>,
<span class='number'>0x71</span>, <span class='number'>0xcb</span>, <span class='number'>0x41</span>, <span class='number'>0xc6</span>, <span class='number'>0x5e</span>, <span class='number'>0x59</span>, <span class='number'>0x0e</span>, <span class='number'>0x09</span>,
<span class='number'>0xda</span>, <span class='number'>0x32</span>, <span class='number'>0x75</span>, <span class='number'>0x60</span>, <span class='number'>0x0c</span>, <span class='number'>0x2f</span>, <span class='number'>0x09</span>, <span class='number'>0xb8</span>,
<span class='number'>0x36</span>, <span class='number'>0x77</span>, <span class='number'>0x93</span>, <span class='number'>0xa9</span>, <span class='number'>0xac</span>, <span class='number'>0xa3</span>, <span class='number'>0xdb</span>, <span class='number'>0x71</span>,
<span class='number'>0xcc</span>, <span class='number'>0x30</span>, <span class='number'>0xc5</span>, <span class='number'>0x81</span>, <span class='number'>0x79</span>, <span class='number'>0xec</span>, <span class='number'>0x3e</span>, <span class='number'>0x87</span>,
<span class='number'>0xc1</span>, <span class='number'>0x4c</span>, <span class='number'>0x01</span>, <span class='number'>0xd5</span>, <span class='number'>0xc1</span>, <span class='number'>0xf3</span>, <span class='number'>0x43</span>, <span class='number'>0x4f</span>,
<span class='number'>0x1d</span>, <span class='number'>0x87</span> ],
},
<span class='ident'>TestVector</span>{
<span class='ident'>digest</span>: <span class='ident'>Sha256</span>::<span class='ident'>new</span>(),
<span class='ident'>ikm</span>: <span class='ident'>repeat</span>(<span class='number'>0x0b</span>).<span class='ident'>take</span>(<span class='number'>22</span>).<span class='ident'>collect</span>(),
<span class='ident'>salt</span>: <span class='macro'>vec</span><span class='macro'>!</span>[],
<span class='ident'>info</span>: <span class='macro'>vec</span><span class='macro'>!</span>[],
<span class='ident'>l</span>:<span class='number'>42</span>,
<span class='ident'>prk</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x19</span>, <span class='number'>0xef</span>, <span class='number'>0x24</span>, <span class='number'>0xa3</span>, <span class='number'>0x2c</span>, <span class='number'>0x71</span>, <span class='number'>0x7b</span>, <span class='number'>0x16</span>,
<span class='number'>0x7f</span>, <span class='number'>0x33</span>, <span class='number'>0xa9</span>, <span class='number'>0x1d</span>, <span class='number'>0x6f</span>, <span class='number'>0x64</span>, <span class='number'>0x8b</span>, <span class='number'>0xdf</span>,
<span class='number'>0x96</span>, <span class='number'>0x59</span>, <span class='number'>0x67</span>, <span class='number'>0x76</span>, <span class='number'>0xaf</span>, <span class='number'>0xdb</span>, <span class='number'>0x63</span>, <span class='number'>0x77</span>,
<span class='number'>0xac</span>, <span class='number'>0x43</span>, <span class='number'>0x4c</span>, <span class='number'>0x1c</span>, <span class='number'>0x29</span>, <span class='number'>0x3c</span>, <span class='number'>0xcb</span>, <span class='number'>0x04</span> ],
<span class='ident'>okm</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x8d</span>, <span class='number'>0xa4</span>, <span class='number'>0xe7</span>, <span class='number'>0x75</span>, <span class='number'>0xa5</span>, <span class='number'>0x63</span>, <span class='number'>0xc1</span>, <span class='number'>0x8f</span>,
<span class='number'>0x71</span>, <span class='number'>0x5f</span>, <span class='number'>0x80</span>, <span class='number'>0x2a</span>, <span class='number'>0x06</span>, <span class='number'>0x3c</span>, <span class='number'>0x5a</span>, <span class='number'>0x31</span>,
<span class='number'>0xb8</span>, <span class='number'>0xa1</span>, <span class='number'>0x1f</span>, <span class='number'>0x5c</span>, <span class='number'>0x5e</span>, <span class='number'>0xe1</span>, <span class='number'>0x87</span>, <span class='number'>0x9e</span>,
<span class='number'>0xc3</span>, <span class='number'>0x45</span>, <span class='number'>0x4e</span>, <span class='number'>0x5f</span>, <span class='number'>0x3c</span>, <span class='number'>0x73</span>, <span class='number'>0x8d</span>, <span class='number'>0x2d</span>,
<span class='number'>0x9d</span>, <span class='number'>0x20</span>, <span class='number'>0x13</span>, <span class='number'>0x95</span>, <span class='number'>0xfa</span>, <span class='number'>0xa4</span>, <span class='number'>0xb6</span>, <span class='number'>0x1a</span>,
<span class='number'>0x96</span>, <span class='number'>0xc8</span> ],
},
);
<span class='kw'>for</span> <span class='ident'>t</span> <span class='kw'>in</span> <span class='ident'>test_vectors</span>.<span class='ident'>iter</span>() {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>prk</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='ident'>t</span>.<span class='ident'>prk</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='ident'>hkdf_extract</span>(<span class='ident'>t</span>.<span class='ident'>digest</span>, <span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>salt</span>[..], <span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>ikm</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>prk</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>prk</span> <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>prk</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>okm</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='ident'>t</span>.<span class='ident'>okm</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>okm</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>l</span>);
<span class='ident'>hkdf_expand</span>(<span class='ident'>t</span>.<span class='ident'>digest</span>, <span class='kw-2'>&</span><span class='ident'>prk</span>[..], <span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>info</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>okm</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>okm</span> <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>okm</span>);
}
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>test_hkdf_rfc5869_sha1_vectors</span>() {
<span class='kw'>let</span> <span class='ident'>test_vectors</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>(
<span class='ident'>TestVector</span>{
<span class='ident'>digest</span>: <span class='ident'>Sha1</span>::<span class='ident'>new</span>(),
<span class='ident'>ikm</span>: <span class='ident'>repeat</span>(<span class='number'>0x0b</span>).<span class='ident'>take</span>(<span class='number'>11</span>).<span class='ident'>collect</span>(),
<span class='ident'>salt</span>: (<span class='number'>0x00</span>..<span class='number'>0x0c</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>info</span>: (<span class='number'>0xf0</span>..<span class='number'>0xf9</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>l</span>: <span class='number'>42</span>,
<span class='ident'>prk</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x9b</span>, <span class='number'>0x6c</span>, <span class='number'>0x18</span>, <span class='number'>0xc4</span>, <span class='number'>0x32</span>, <span class='number'>0xa7</span>, <span class='number'>0xbf</span>, <span class='number'>0x8f</span>,
<span class='number'>0x0e</span>, <span class='number'>0x71</span>, <span class='number'>0xc8</span>, <span class='number'>0xeb</span>, <span class='number'>0x88</span>, <span class='number'>0xf4</span>, <span class='number'>0xb3</span>, <span class='number'>0x0b</span>,
<span class='number'>0xaa</span>, <span class='number'>0x2b</span>, <span class='number'>0xa2</span>, <span class='number'>0x43</span> ],
<span class='ident'>okm</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x08</span>, <span class='number'>0x5a</span>, <span class='number'>0x01</span>, <span class='number'>0xea</span>, <span class='number'>0x1b</span>, <span class='number'>0x10</span>, <span class='number'>0xf3</span>, <span class='number'>0x69</span>,
<span class='number'>0x33</span>, <span class='number'>0x06</span>, <span class='number'>0x8b</span>, <span class='number'>0x56</span>, <span class='number'>0xef</span>, <span class='number'>0xa5</span>, <span class='number'>0xad</span>, <span class='number'>0x81</span>,
<span class='number'>0xa4</span>, <span class='number'>0xf1</span>, <span class='number'>0x4b</span>, <span class='number'>0x82</span>, <span class='number'>0x2f</span>, <span class='number'>0x5b</span>, <span class='number'>0x09</span>, <span class='number'>0x15</span>,
<span class='number'>0x68</span>, <span class='number'>0xa9</span>, <span class='number'>0xcd</span>, <span class='number'>0xd4</span>, <span class='number'>0xf1</span>, <span class='number'>0x55</span>, <span class='number'>0xfd</span>, <span class='number'>0xa2</span>,
<span class='number'>0xc2</span>, <span class='number'>0x2e</span>, <span class='number'>0x42</span>, <span class='number'>0x24</span>, <span class='number'>0x78</span>, <span class='number'>0xd3</span>, <span class='number'>0x05</span>, <span class='number'>0xf3</span>,
<span class='number'>0xf8</span>, <span class='number'>0x96</span> ],
},
<span class='ident'>TestVector</span>{
<span class='ident'>digest</span>: <span class='ident'>Sha1</span>::<span class='ident'>new</span>(),
<span class='ident'>ikm</span>: (<span class='number'>0x00</span>..<span class='number'>0x4f</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>salt</span>: (<span class='number'>0x60</span>..<span class='number'>0xaf</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>collect</span>(),
<span class='ident'>info</span>: (<span class='number'>0xb0</span>..<span class='number'>0xff</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span> <span class='kw'>as</span> <span class='ident'>u8</span>).<span class='ident'>collect</span>(),
<span class='ident'>l</span>: <span class='number'>82</span>,
<span class='ident'>prk</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x8a</span>, <span class='number'>0xda</span>, <span class='number'>0xe0</span>, <span class='number'>0x9a</span>, <span class='number'>0x2a</span>, <span class='number'>0x30</span>, <span class='number'>0x70</span>, <span class='number'>0x59</span>,
<span class='number'>0x47</span>, <span class='number'>0x8d</span>, <span class='number'>0x30</span>, <span class='number'>0x9b</span>, <span class='number'>0x26</span>, <span class='number'>0xc4</span>, <span class='number'>0x11</span>, <span class='number'>0x5a</span>,
<span class='number'>0x22</span>, <span class='number'>0x4c</span>, <span class='number'>0xfa</span>, <span class='number'>0xf6</span> ],
<span class='ident'>okm</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x0b</span>, <span class='number'>0xd7</span>, <span class='number'>0x70</span>, <span class='number'>0xa7</span>, <span class='number'>0x4d</span>, <span class='number'>0x11</span>, <span class='number'>0x60</span>, <span class='number'>0xf7</span>,
<span class='number'>0xc9</span>, <span class='number'>0xf1</span>, <span class='number'>0x2c</span>, <span class='number'>0xd5</span>, <span class='number'>0x91</span>, <span class='number'>0x2a</span>, <span class='number'>0x06</span>, <span class='number'>0xeb</span>,
<span class='number'>0xff</span>, <span class='number'>0x6a</span>, <span class='number'>0xdc</span>, <span class='number'>0xae</span>, <span class='number'>0x89</span>, <span class='number'>0x9d</span>, <span class='number'>0x92</span>, <span class='number'>0x19</span>,
<span class='number'>0x1f</span>, <span class='number'>0xe4</span>, <span class='number'>0x30</span>, <span class='number'>0x56</span>, <span class='number'>0x73</span>, <span class='number'>0xba</span>, <span class='number'>0x2f</span>, <span class='number'>0xfe</span>,
<span class='number'>0x8f</span>, <span class='number'>0xa3</span>, <span class='number'>0xf1</span>, <span class='number'>0xa4</span>, <span class='number'>0xe5</span>, <span class='number'>0xad</span>, <span class='number'>0x79</span>, <span class='number'>0xf3</span>,
<span class='number'>0xf3</span>, <span class='number'>0x34</span>, <span class='number'>0xb3</span>, <span class='number'>0xb2</span>, <span class='number'>0x02</span>, <span class='number'>0xb2</span>, <span class='number'>0x17</span>, <span class='number'>0x3c</span>,
<span class='number'>0x48</span>, <span class='number'>0x6e</span>, <span class='number'>0xa3</span>, <span class='number'>0x7c</span>, <span class='number'>0xe3</span>, <span class='number'>0xd3</span>, <span class='number'>0x97</span>, <span class='number'>0xed</span>,
<span class='number'>0x03</span>, <span class='number'>0x4c</span>, <span class='number'>0x7f</span>, <span class='number'>0x9d</span>, <span class='number'>0xfe</span>, <span class='number'>0xb1</span>, <span class='number'>0x5c</span>, <span class='number'>0x5e</span>,
<span class='number'>0x92</span>, <span class='number'>0x73</span>, <span class='number'>0x36</span>, <span class='number'>0xd0</span>, <span class='number'>0x44</span>, <span class='number'>0x1f</span>, <span class='number'>0x4c</span>, <span class='number'>0x43</span>,
<span class='number'>0x00</span>, <span class='number'>0xe2</span>, <span class='number'>0xcf</span>, <span class='number'>0xf0</span>, <span class='number'>0xd0</span>, <span class='number'>0x90</span>, <span class='number'>0x0b</span>, <span class='number'>0x52</span>,
<span class='number'>0xd3</span>, <span class='number'>0xb4</span> ],
},
<span class='ident'>TestVector</span>{
<span class='ident'>digest</span>: <span class='ident'>Sha1</span>::<span class='ident'>new</span>(),
<span class='ident'>ikm</span>: <span class='ident'>repeat</span>(<span class='number'>0x0b</span>).<span class='ident'>take</span>(<span class='number'>22</span>).<span class='ident'>collect</span>(),
<span class='ident'>salt</span>: <span class='macro'>vec</span><span class='macro'>!</span>[],
<span class='ident'>info</span>: <span class='macro'>vec</span><span class='macro'>!</span>[],
<span class='ident'>l</span>:<span class='number'>42</span>,
<span class='ident'>prk</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0xda</span>, <span class='number'>0x8c</span>, <span class='number'>0x8a</span>, <span class='number'>0x73</span>, <span class='number'>0xc7</span>, <span class='number'>0xfa</span>, <span class='number'>0x77</span>, <span class='number'>0x28</span>,
<span class='number'>0x8e</span>, <span class='number'>0xc6</span>, <span class='number'>0xf5</span>, <span class='number'>0xe7</span>, <span class='number'>0xc2</span>, <span class='number'>0x97</span>, <span class='number'>0x78</span>, <span class='number'>0x6a</span>,
<span class='number'>0xa0</span>, <span class='number'>0xd3</span>, <span class='number'>0x2d</span>, <span class='number'>0x01</span> ],
<span class='ident'>okm</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x0a</span>, <span class='number'>0xc1</span>, <span class='number'>0xaf</span>, <span class='number'>0x70</span>, <span class='number'>0x02</span>, <span class='number'>0xb3</span>, <span class='number'>0xd7</span>, <span class='number'>0x61</span>,
<span class='number'>0xd1</span>, <span class='number'>0xe5</span>, <span class='number'>0x52</span>, <span class='number'>0x98</span>, <span class='number'>0xda</span>, <span class='number'>0x9d</span>, <span class='number'>0x05</span>, <span class='number'>0x06</span>,
<span class='number'>0xb9</span>, <span class='number'>0xae</span>, <span class='number'>0x52</span>, <span class='number'>0x05</span>, <span class='number'>0x72</span>, <span class='number'>0x20</span>, <span class='number'>0xa3</span>, <span class='number'>0x06</span>,
<span class='number'>0xe0</span>, <span class='number'>0x7b</span>, <span class='number'>0x6b</span>, <span class='number'>0x87</span>, <span class='number'>0xe8</span>, <span class='number'>0xdf</span>, <span class='number'>0x21</span>, <span class='number'>0xd0</span>,
<span class='number'>0xea</span>, <span class='number'>0x00</span>, <span class='number'>0x03</span>, <span class='number'>0x3d</span>, <span class='number'>0xe0</span>, <span class='number'>0x39</span>, <span class='number'>0x84</span>, <span class='number'>0xd3</span>,
<span class='number'>0x49</span>, <span class='number'>0x18</span> ],
},
);
<span class='kw'>for</span> <span class='ident'>t</span> <span class='kw'>in</span> <span class='ident'>test_vectors</span>.<span class='ident'>iter</span>() {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>prk</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='ident'>t</span>.<span class='ident'>prk</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='ident'>hkdf_extract</span>(<span class='ident'>t</span>.<span class='ident'>digest</span>, <span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>salt</span>[..], <span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>ikm</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>prk</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>prk</span> <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>prk</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>okm</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>repeat</span>(<span class='number'>0</span>).<span class='ident'>take</span>(<span class='ident'>t</span>.<span class='ident'>okm</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>okm</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>l</span>);
<span class='ident'>hkdf_expand</span>(<span class='ident'>t</span>.<span class='ident'>digest</span>, <span class='kw-2'>&</span><span class='ident'>prk</span>[..], <span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>info</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>okm</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>okm</span> <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>okm</span>);
}
}
}
</pre>
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