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</pre><pre class="rust"><code><span class="comment">// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// &quot;License&quot;); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License..
</span><span class="kw">use </span>core::array::TryFromSliceError;
<span class="kw">use </span>core::convert::{From, TryFrom, TryInto};
<span class="kw">use </span>sgx_crypto_sys::<span class="kw-2">*</span>;
<span class="kw">use </span>sgx_types::error::{SgxResult, SgxStatus};
<span class="kw">use </span>sgx_types::marker::{BytewiseEquality, ContiguousMemory};
<span class="kw">use </span>sgx_types::types::{AlignKey128bit, Key128bit, SM4CBC_IV_SIZE};
<span class="attribute">#[derive(Clone, Copy, Debug, Eq, PartialEq)]
</span><span class="kw">pub struct </span>Sm4Cbc {
key: AlignKey128bit,
iv: Nonce,
}
<span class="kw">impl </span>Sm4Cbc {
<span class="kw">const </span>MBS_SMS4: usize = <span class="number">16</span>;
<span class="kw">pub fn </span>new(key: <span class="kw-2">&amp;</span>Key128bit, iv: Nonce) -&gt; Sm4Cbc {
Sm4Cbc {
key: AlignKey128bit::from(key),
iv,
}
}
<span class="kw">pub fn </span>encrypt(<span class="kw-2">&amp;mut </span><span class="self">self</span>, src: <span class="kw-2">&amp;</span>[u8], dst: <span class="kw-2">&amp;mut </span>[u8]) -&gt; SgxResult {
<span class="kw">let </span>src_len = src.len();
<span class="kw">let </span>dst_len = dst.len();
<span class="macro">ensure!</span>(
(<span class="number">1</span>..i32::MAX <span class="kw">as </span>usize).contains(<span class="kw-2">&amp;</span>src_len),
SgxStatus::InvalidParameter
);
<span class="macro">ensure!</span>(src_len % <span class="self">Self</span>::MBS_SMS4 == <span class="number">0</span>, SgxStatus::InvalidParameter);
<span class="macro">ensure!</span>(src_len == dst_len, SgxStatus::InvalidParameter);
<span class="kw">let </span>status = <span class="kw">unsafe </span>{
sgx_sm4_cbc_encrypt(
<span class="kw-2">&amp;</span><span class="self">self</span>.key.key <span class="kw">as </span><span class="kw-2">*const </span>Key128bit,
src.as_ptr(),
src_len <span class="kw">as </span>u32,
dst.as_mut_ptr(),
<span class="self">self</span>.iv.as_ref().as_ptr(),
<span class="self">self</span>.iv.as_ref().len() <span class="kw">as </span>u32,
)
};
<span class="macro">ensure!</span>(status.is_success(), status);
<span class="prelude-val">Ok</span>(())
}
<span class="kw">pub fn </span>encrypt_in_place(<span class="kw-2">&amp;mut </span><span class="self">self</span>, in_out: <span class="kw-2">&amp;mut </span>[u8]) -&gt; SgxResult {
<span class="kw">let </span><span class="kw-2">mut </span>dst = <span class="macro">vec!</span>[<span class="number">0_u8</span>; in_out.len()];
<span class="self">self</span>.encrypt(in_out, dst.as_mut_slice())<span class="question-mark">?</span>;
in_out.clone_from_slice(dst.as_slice());
<span class="prelude-val">Ok</span>(())
}
<span class="kw">pub fn </span>decrypt(<span class="kw-2">&amp;mut </span><span class="self">self</span>, src: <span class="kw-2">&amp;</span>[u8], dst: <span class="kw-2">&amp;mut </span>[u8]) -&gt; SgxResult {
<span class="kw">let </span>src_len = src.len();
<span class="kw">let </span>dst_len = dst.len();
<span class="macro">ensure!</span>(
(<span class="number">1</span>..i32::MAX <span class="kw">as </span>usize).contains(<span class="kw-2">&amp;</span>src_len),
SgxStatus::InvalidParameter
);
<span class="macro">ensure!</span>(src_len % <span class="self">Self</span>::MBS_SMS4 == <span class="number">0</span>, SgxStatus::InvalidParameter);
<span class="macro">ensure!</span>(src_len == dst_len, SgxStatus::InvalidParameter);
<span class="kw">let </span>status = <span class="kw">unsafe </span>{
sgx_sm4_cbc_decrypt(
<span class="kw-2">&amp;</span><span class="self">self</span>.key.key <span class="kw">as </span><span class="kw-2">*const </span>Key128bit,
src.as_ptr(),
src_len <span class="kw">as </span>u32,
dst.as_mut_ptr(),
<span class="self">self</span>.iv.as_ref().as_ptr(),
<span class="self">self</span>.iv.as_ref().len() <span class="kw">as </span>u32,
)
};
<span class="macro">ensure!</span>(status.is_success(), status);
<span class="prelude-val">Ok</span>(())
}
<span class="kw">pub fn </span>decrypt_in_place(<span class="kw-2">&amp;mut </span><span class="self">self</span>, in_out: <span class="kw-2">&amp;mut </span>[u8]) -&gt; SgxResult {
<span class="kw">let </span><span class="kw-2">mut </span>dst = <span class="macro">vec!</span>[<span class="number">0_u8</span>; in_out.len()];
<span class="self">self</span>.decrypt(in_out, dst.as_mut_slice())<span class="question-mark">?</span>;
in_out.clone_from_slice(dst.as_slice());
<span class="prelude-val">Ok</span>(())
}
}
<span class="kw">impl </span>Default <span class="kw">for </span>Sm4Cbc {
<span class="kw">fn </span>default() -&gt; Sm4Cbc {
<span class="kw">let </span><span class="kw-2">mut </span>key = AlignKey128bit::default();
<span class="kw">super</span>::rand(<span class="kw-2">&amp;mut </span>key.key);
Sm4Cbc {
key,
iv: Nonce::new(),
}
}
}
<span class="attribute">#[derive(Clone, Copy, Debug, Eq, PartialEq)]
</span><span class="kw">pub struct </span>Nonce([u8; SM4CBC_IV_SIZE]);
<span class="kw">impl </span>Nonce {
<span class="kw">pub fn </span>new() -&gt; Nonce {
<span class="kw">let </span><span class="kw-2">mut </span>nonce = [<span class="number">0_u8</span>; SM4CBC_IV_SIZE];
<span class="kw">super</span>::rand(<span class="kw-2">&amp;mut </span>nonce);
Nonce(nonce)
}
<span class="attribute">#[inline]
</span><span class="kw">pub fn </span>zeroed() -&gt; Nonce {
Nonce([<span class="number">0_u8</span>; SM4CBC_IV_SIZE])
}
}
<span class="kw">impl </span>Default <span class="kw">for </span>Nonce {
<span class="attribute">#[inline]
</span><span class="kw">fn </span>default() -&gt; Nonce {
Nonce::new()
}
}
<span class="kw">impl </span>AsRef&lt;[u8; SM4CBC_IV_SIZE]&gt; <span class="kw">for </span>Nonce {
<span class="attribute">#[inline]
</span><span class="kw">fn </span>as_ref(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span>[u8; SM4CBC_IV_SIZE] {
<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="number">0
</span>}
}
<span class="kw">impl </span>From&lt;[u8; SM4CBC_IV_SIZE]&gt; <span class="kw">for </span>Nonce {
<span class="attribute">#[inline]
</span><span class="kw">fn </span>from(nonce: [u8; SM4CBC_IV_SIZE]) -&gt; Nonce {
Nonce(nonce)
}
}
<span class="kw">impl </span>From&lt;<span class="kw-2">&amp;</span>[u8; SM4CBC_IV_SIZE]&gt; <span class="kw">for </span>Nonce {
<span class="attribute">#[inline]
</span><span class="kw">fn </span>from(nonce: <span class="kw-2">&amp;</span>[u8; SM4CBC_IV_SIZE]) -&gt; Nonce {
Nonce(<span class="kw-2">*</span>nonce)
}
}
<span class="kw">impl </span>TryFrom&lt;<span class="kw-2">&amp;</span>[u8]&gt; <span class="kw">for </span>Nonce {
<span class="kw">type </span>Error = TryFromSliceError;
<span class="kw">fn </span>try_from(nonce: <span class="kw-2">&amp;</span>[u8]) -&gt; <span class="prelude-ty">Result</span>&lt;Nonce, TryFromSliceError&gt; {
<span class="kw">let </span>nonce: <span class="kw-2">&amp;</span>[u8; SM4CBC_IV_SIZE] = nonce.try_into()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(Nonce(<span class="kw-2">*</span>nonce))
}
}
<span class="kw">unsafe impl </span>ContiguousMemory <span class="kw">for </span>Nonce {}
<span class="kw">unsafe impl </span>BytewiseEquality <span class="kw">for </span>Nonce {}
</code></pre></div>
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