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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='kw'>use</span> <span class='ident'>aes</span>::{<span class='ident'>ctr</span>, <span class='ident'>KeySize</span>};
<span class='kw'>use</span> <span class='ident'>aead</span>::{<span class='ident'>AeadEncryptor</span>,<span class='ident'>AeadDecryptor</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'>symmetriccipher</span>::<span class='ident'>SynchronousStreamCipher</span>;
<span class='kw'>use</span> <span class='ident'>ghash</span>::{<span class='ident'>Ghash</span>};
<span class='kw'>use</span> <span class='ident'>util</span>::<span class='ident'>fixed_time_eq</span>;
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>AesGcm</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> {
<span class='ident'>cipher</span>: <span class='ident'>Box</span><span class='op'><</span><span class='ident'>SynchronousStreamCipher</span> <span class='op'>+</span> <span class='lifetime'>'a</span><span class='op'>></span>,
<span class='ident'>mac</span>: <span class='ident'>Ghash</span>,
<span class='ident'>finished</span>: <span class='ident'>bool</span>,
<span class='ident'>end_tag</span>: [<span class='ident'>u8</span>; <span class='number'>16</span>]
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>AesGcm</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> {
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span> (<span class='ident'>key_size</span>: <span class='ident'>KeySize</span>, <span class='ident'>key</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>nonce</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>aad</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>AesGcm</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> {
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>key</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>16</span> <span class='op'>||</span> <span class='ident'>key</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>24</span> <span class='op'>||</span> <span class='ident'>key</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>32</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>nonce</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>12</span>);
<span class='comment'>// GCM technically differs from CTR mode in how role overs are handled</span>
<span class='comment'>// GCM only touches the right most 4 bytes while CTR roles all 16 over</span>
<span class='comment'>// when the iv is only 96 bits (12 bytes) then 4 bytes of zeros are</span>
<span class='comment'>// appended to it meaning you have to encrypt 2^37 bytes (256 gigabytes)</span>
<span class='comment'>// of data before a difference crops up.</span>
<span class='comment'>// The GCM handles nonces of other lengths by hashing them once with ghash</span>
<span class='comment'>// this would cause the roleover behavior to potentially be triggered much</span>
<span class='comment'>// earlier preventing the use of generic CTR mode.</span>
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>iv</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='ident'>copy_memory</span>(<span class='ident'>nonce</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>iv</span>);
<span class='ident'>iv</span>[<span class='number'>15</span>] <span class='op'>=</span> <span class='number'>1u8</span>;
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>cipher</span> <span class='op'>=</span> <span class='ident'>ctr</span>(<span class='ident'>key_size</span>,<span class='ident'>key</span>,<span class='kw-2'>&</span><span class='ident'>iv</span>);
<span class='kw'>let</span> <span class='ident'>temp_block</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>final_block</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='ident'>cipher</span>.<span class='ident'>process</span>(<span class='kw-2'>&</span><span class='ident'>temp_block</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>final_block</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>hash_key</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>encryptor</span> <span class='op'>=</span> <span class='ident'>ctr</span>(<span class='ident'>key_size</span>,<span class='ident'>key</span>,<span class='kw-2'>&</span><span class='ident'>temp_block</span>);
<span class='ident'>encryptor</span>.<span class='ident'>process</span>(<span class='kw-2'>&</span><span class='ident'>temp_block</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>hash_key</span>);
<span class='ident'>AesGcm</span> {
<span class='ident'>cipher</span>: <span class='ident'>cipher</span>,
<span class='ident'>mac</span>: <span class='ident'>Ghash</span>::<span class='ident'>new</span>(<span class='kw-2'>&</span><span class='ident'>hash_key</span>).<span class='ident'>input_a</span>(<span class='ident'>aad</span>),
<span class='ident'>finished</span>: <span class='bool-val'>false</span>,
<span class='ident'>end_tag</span>: <span class='ident'>final_block</span>
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>AeadEncryptor</span> <span class='kw'>for</span> <span class='ident'>AesGcm</span><span class='op'><</span><span class='lifetime'>'static</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>encrypt</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>input</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>output</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>], <span class='ident'>tag</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'>input</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='ident'>output</span>.<span class='ident'>len</span>());
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='self'>self</span>.<span class='ident'>finished</span>);
<span class='self'>self</span>.<span class='ident'>cipher</span>.<span class='ident'>process</span>(<span class='ident'>input</span>, <span class='ident'>output</span>);
<span class='kw'>let</span> <span class='ident'>result</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>mac</span>.<span class='ident'>input_c</span>(<span class='ident'>output</span>).<span class='ident'>result</span>();
<span class='self'>self</span>.<span class='ident'>finished</span> <span class='op'>=</span> <span class='bool-val'>true</span>;
<span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>16</span> {
<span class='ident'>tag</span>[<span class='ident'>i</span>] <span class='op'>=</span> <span class='ident'>result</span>[<span class='ident'>i</span>] <span class='op'>^</span> <span class='self'>self</span>.<span class='ident'>end_tag</span>[<span class='ident'>i</span>];
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>AeadDecryptor</span> <span class='kw'>for</span> <span class='ident'>AesGcm</span><span class='op'><</span><span class='lifetime'>'static</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>decrypt</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>input</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>output</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>], <span class='ident'>tag</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>input</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='ident'>output</span>.<span class='ident'>len</span>());
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='self'>self</span>.<span class='ident'>finished</span>);
<span class='self'>self</span>.<span class='ident'>finished</span> <span class='op'>=</span> <span class='bool-val'>true</span>;
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>calc_tag</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>mac</span>.<span class='ident'>input_c</span>(<span class='ident'>input</span>).<span class='ident'>result</span>();
<span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>16</span> {
<span class='ident'>calc_tag</span>[<span class='ident'>i</span>] <span class='op'>^=</span> <span class='self'>self</span>.<span class='ident'>end_tag</span>[<span class='ident'>i</span>];
}
<span class='kw'>if</span> <span class='ident'>fixed_time_eq</span>(<span class='kw-2'>&</span><span class='ident'>calc_tag</span>, <span class='ident'>tag</span>) {
<span class='self'>self</span>.<span class='ident'>cipher</span>.<span class='ident'>process</span>(<span class='ident'>input</span>, <span class='ident'>output</span>);
<span class='bool-val'>true</span>
} <span class='kw'>else</span> {
<span class='bool-val'>false</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'>aes</span>::<span class='ident'>KeySize</span>;
<span class='kw'>use</span> <span class='ident'>aes_gcm</span>::<span class='ident'>AesGcm</span>;
<span class='kw'>use</span> <span class='ident'>aead</span>::{<span class='ident'>AeadEncryptor</span>, <span class='ident'>AeadDecryptor</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'>std</span>::<span class='ident'>iter</span>::<span class='ident'>repeat</span>;
<span class='kw'>fn</span> <span class='ident'>hex_to_bytes</span>(<span class='ident'>raw_hex</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> {
<span class='ident'>raw_hex</span>.<span class='ident'>from_hex</span>().<span class='ident'>ok</span>().<span class='ident'>unwrap</span>()
}
<span class='kw'>struct</span> <span class='ident'>TestVector</span> {
<span class='ident'>key</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>iv</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>plain_text</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>cipher_text</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>aad</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>tag</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
}
<span class='kw'>fn</span> <span class='ident'>get_test_vectors</span>()<span class='op'>-></span> [<span class='ident'>TestVector</span>; <span class='number'>5</span>]{
[
<span class='ident'>TestVector</span> {
<span class='ident'>key</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"00000000000000000000000000000000"</span>),
<span class='ident'>iv</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"000000000000000000000000"</span>),
<span class='ident'>plain_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>""</span>),
<span class='ident'>cipher_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>""</span>),
<span class='ident'>aad</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>""</span>),
<span class='ident'>tag</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"58e2fccefa7e3061367f1d57a4e7455a"</span>)
},
<span class='ident'>TestVector</span> {
<span class='ident'>key</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"00000000000000000000000000000000"</span>),
<span class='ident'>iv</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"000000000000000000000000"</span>),
<span class='ident'>plain_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"00000000000000000000000000000000"</span>),
<span class='ident'>cipher_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"0388dace60b6a392f328c2b971b2fe78"</span>),
<span class='ident'>aad</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>""</span>),
<span class='ident'>tag</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"ab6e47d42cec13bdf53a67b21257bddf"</span>)
},
<span class='ident'>TestVector</span> {
<span class='ident'>key</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"feffe9928665731c6d6a8f9467308308"</span>),
<span class='ident'>iv</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"cafebabefacedbaddecaf888"</span>),
<span class='ident'>plain_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39"</span>),
<span class='ident'>cipher_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"42831ec2217774244b7221b784d0d49ce3aa212f2c02a4e035c17e2329aca12e21d514b25466931c7d8f6a5aac84aa051ba30b396a0aac973d58e091"</span>),
<span class='ident'>aad</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"feedfacedeadbeeffeedfacedeadbeefabaddad2"</span>),
<span class='ident'>tag</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"5bc94fbc3221a5db94fae95ae7121a47"</span>)
},
<span class='ident'>TestVector</span> {
<span class='ident'>key</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"feffe9928665731c6d6a8f9467308308feffe9928665731c"</span>),
<span class='ident'>iv</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"cafebabefacedbaddecaf888"</span>),
<span class='ident'>plain_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39"</span>),
<span class='ident'>cipher_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"3980ca0b3c00e841eb06fac4872a2757859e1ceaa6efd984628593b40ca1e19c7d773d00c144c525ac619d18c84a3f4718e2448b2fe324d9ccda2710"</span>),
<span class='ident'>aad</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"feedfacedeadbeeffeedfacedeadbeefabaddad2"</span>),
<span class='ident'>tag</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"2519498e80f1478f37ba55bd6d27618c"</span>)
},
<span class='ident'>TestVector</span> {
<span class='ident'>key</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308"</span>),
<span class='ident'>iv</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"cafebabefacedbaddecaf888"</span>),
<span class='ident'>plain_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39"</span>),
<span class='ident'>cipher_text</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"522dc1f099567d07f47f37a32a84427d643a8cdcbfe5c0c97598a2bd2555d1aa8cb08e48590dbb3da7b08b1056828838c5f61e6393ba7a0abcc9f662"</span>),
<span class='ident'>aad</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"feedfacedeadbeeffeedfacedeadbeefabaddad2"</span>),
<span class='ident'>tag</span>: <span class='ident'>hex_to_bytes</span>(<span class='string'>"76fc6ece0f4e1768cddf8853bb2d551b"</span>)
},
]
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>aes_gcm_test</span>() {
<span class='kw'>for</span> <span class='ident'>item</span> <span class='kw'>in</span> <span class='ident'>get_test_vectors</span>().<span class='ident'>iter</span>() {
<span class='kw'>let</span> <span class='ident'>key_size</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>item</span>.<span class='ident'>key</span>.<span class='ident'>len</span>() {
<span class='number'>16</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize128</span>,
<span class='number'>24</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize192</span>,
<span class='number'>32</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>,
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>()
};
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>cipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>key_size</span>, <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>key</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>iv</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>aad</span>[..]);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>out</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'>item</span>.<span class='ident'>plain_text</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>out_tag</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='number'>16</span>).<span class='ident'>collect</span>();
<span class='ident'>cipher</span>.<span class='ident'>encrypt</span>(<span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>plain_text</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>out</span>[..],<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>out_tag</span>[..]);
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>out</span>, <span class='ident'>item</span>.<span class='ident'>cipher_text</span>);
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>out_tag</span>, <span class='ident'>item</span>.<span class='ident'>tag</span>);
}
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>aes_gcm_decrypt_test</span>() {
<span class='kw'>for</span> <span class='ident'>item</span> <span class='kw'>in</span> <span class='ident'>get_test_vectors</span>().<span class='ident'>iter</span>() {
<span class='kw'>let</span> <span class='ident'>key_size</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>item</span>.<span class='ident'>key</span>.<span class='ident'>len</span>() {
<span class='number'>16</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize128</span>,
<span class='number'>24</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize192</span>,
<span class='number'>32</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>,
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>()
};
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>decipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>key_size</span>, <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>key</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>iv</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>aad</span>[..]);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>out</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'>item</span>.<span class='ident'>plain_text</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='kw'>let</span> <span class='ident'>result</span> <span class='op'>=</span> <span class='ident'>decipher</span>.<span class='ident'>decrypt</span>(<span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>cipher_text</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>out</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>tag</span>[..]);
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>out</span>, <span class='ident'>item</span>.<span class='ident'>plain_text</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>result</span>);
}
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>aes_gcm_decrypt_fail_test</span>() {
<span class='kw'>for</span> <span class='ident'>item</span> <span class='kw'>in</span> <span class='ident'>get_test_vectors</span>().<span class='ident'>iter</span>() {
<span class='kw'>let</span> <span class='ident'>key_size</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>item</span>.<span class='ident'>key</span>.<span class='ident'>len</span>() {
<span class='number'>16</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize128</span>,
<span class='number'>24</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize192</span>,
<span class='number'>32</span> <span class='op'>=></span> <span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>,
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>()
};
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>decipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>key_size</span>, <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>key</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>iv</span>[..], <span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>aad</span>[..]);
<span class='kw'>let</span> <span class='ident'>tag</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='number'>16</span>).<span class='ident'>collect</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>out1</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'>item</span>.<span class='ident'>plain_text</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='kw'>let</span> <span class='ident'>out2</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'>item</span>.<span class='ident'>plain_text</span>.<span class='ident'>len</span>()).<span class='ident'>collect</span>();
<span class='kw'>let</span> <span class='ident'>result</span> <span class='op'>=</span> <span class='ident'>decipher</span>.<span class='ident'>decrypt</span>(<span class='kw-2'>&</span><span class='ident'>item</span>.<span class='ident'>cipher_text</span>[..], <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>out1</span>[..], <span class='kw-2'>&</span><span class='ident'>tag</span>[..]);
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>out1</span>, <span class='ident'>out2</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>result</span>);
}
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>all</span>(<span class='ident'>test</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"with-bench"</span>))]</span>
<span class='kw'>mod</span> <span class='ident'>bench</span> {
<span class='kw'>use</span> <span class='ident'>test</span>::<span class='ident'>Bencher</span>;
<span class='kw'>use</span> <span class='ident'>aes</span>::<span class='ident'>KeySize</span>;
<span class='kw'>use</span> <span class='ident'>aes_gcm</span>::<span class='ident'>AesGcm</span>;
<span class='kw'>use</span> <span class='ident'>aead</span>::{<span class='ident'>AeadEncryptor</span>, <span class='ident'>AeadDecryptor</span>};
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>gsm_10</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='ident'>input</span> <span class='op'>=</span> [<span class='number'>1u8</span>; <span class='number'>10</span>];
<span class='kw'>let</span> <span class='ident'>aad</span> <span class='op'>=</span> [<span class='number'>3u8</span>; <span class='number'>10</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>cipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>, <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>32</span>], <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>12</span>], <span class='kw-2'>&</span><span class='ident'>aad</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>decipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>, <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>32</span>], <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>12</span>], <span class='kw-2'>&</span><span class='ident'>aad</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>output</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>10</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>tag</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>output2</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>10</span>];
<span class='ident'>cipher</span>.<span class='ident'>encrypt</span>(<span class='kw-2'>&</span><span class='ident'>input</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>output</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>tag</span>);
<span class='ident'>decipher</span>.<span class='ident'>decrypt</span>(<span class='kw-2'>&</span><span class='ident'>output</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>output2</span>, <span class='kw-2'>&</span><span class='ident'>tag</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='number'>10u64</span>;
}
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>gsm_1k</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='ident'>input</span> <span class='op'>=</span> [<span class='number'>1u8</span>; <span class='number'>1024</span>];
<span class='kw'>let</span> <span class='ident'>aad</span> <span class='op'>=</span> [<span class='number'>3u8</span>; <span class='number'>1024</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>cipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>, <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>32</span>], <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>12</span>], <span class='kw-2'>&</span><span class='ident'>aad</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>decipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>, <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>32</span>], <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>12</span>], <span class='kw-2'>&</span><span class='ident'>aad</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>output</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>1024</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>tag</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>output2</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>1024</span>];
<span class='ident'>cipher</span>.<span class='ident'>encrypt</span>(<span class='kw-2'>&</span><span class='ident'>input</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>output</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>tag</span>);
<span class='ident'>decipher</span>.<span class='ident'>decrypt</span>(<span class='kw-2'>&</span><span class='ident'>output</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>output2</span>, <span class='kw-2'>&</span><span class='ident'>tag</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='number'>1024u64</span>;
}
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>gsm_64k</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='ident'>input</span> <span class='op'>=</span> [<span class='number'>1u8</span>; <span class='number'>65536</span>];
<span class='kw'>let</span> <span class='ident'>aad</span> <span class='op'>=</span> [<span class='number'>3u8</span>; <span class='number'>65536</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>cipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>, <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>32</span>], <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>12</span>], <span class='kw-2'>&</span><span class='ident'>aad</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>decipher</span> <span class='op'>=</span> <span class='ident'>AesGcm</span>::<span class='ident'>new</span>(<span class='ident'>KeySize</span>::<span class='ident'>KeySize256</span>, <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>32</span>], <span class='kw-2'>&</span>[<span class='number'>0</span>; <span class='number'>12</span>], <span class='kw-2'>&</span><span class='ident'>aad</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>output</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>65536</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>tag</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>16</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>output2</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>65536</span>];
<span class='ident'>cipher</span>.<span class='ident'>encrypt</span>(<span class='kw-2'>&</span><span class='ident'>input</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>output</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>tag</span>);
<span class='ident'>decipher</span>.<span class='ident'>decrypt</span>(<span class='kw-2'>&</span><span class='ident'>output</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>output2</span>, <span class='kw-2'>&</span><span class='ident'>tag</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='number'>65536u64</span>;
}
}
</pre>
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