| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-0.10.54/src/aes.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>aes.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../openssl/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../openssl/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="doccomment">//! Low level AES IGE and key wrapping functionality |
| //! |
| //! AES ECB, CBC, XTS, CTR, CFB, GCM and other conventional symmetric encryption |
| //! modes are found in [`symm`]. This is the implementation of AES IGE and key wrapping |
| //! |
| //! Advanced Encryption Standard (AES) provides symmetric key cipher that |
| //! the same key is used to encrypt and decrypt data. This implementation |
| //! uses 128, 192, or 256 bit keys. This module provides functions to |
| //! create a new key with [`new_encrypt`] and perform an encryption/decryption |
| //! using that key with [`aes_ige`]. |
| //! |
| //! [`new_encrypt`]: struct.AesKey.html#method.new_encrypt |
| //! [`aes_ige`]: fn.aes_ige.html |
| //! |
| //! The [`symm`] module should be used in preference to this module in most cases. |
| //! The IGE block cipher is a non-traditional cipher mode. More traditional AES |
| //! encryption methods are found in the [`Crypter`] and [`Cipher`] structs. |
| //! |
| //! [`symm`]: ../symm/index.html |
| //! [`Crypter`]: ../symm/struct.Crypter.html |
| //! [`Cipher`]: ../symm/struct.Cipher.html |
| //! |
| //! # Examples |
| |
| </span><span class="attribute">#![cfg_attr( |
| all(not(boringssl), not(osslconf = <span class="string">"OPENSSL_NO_DEPRECATED_3_0"</span>)), |
| doc = <span class="string">r#"\ |
| ## AES IGE |
| ```rust |
| use openssl::aes::{AesKey, aes_ige}; |
| use openssl::symm::Mode; |
| |
| let key = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"; |
| let plaintext = b"\x12\x34\x56\x78\x90\x12\x34\x56\x12\x34\x56\x78\x90\x12\x34\x56"; |
| let mut iv = *b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F\ |
| \x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F"; |
| |
| let key = AesKey::new_encrypt(key).unwrap(); |
| let mut output = [0u8; 16]; |
| aes_ige(plaintext, &mut output, &key, &mut iv, Mode::Encrypt); |
| assert_eq!(output, *b"\xa6\xad\x97\x4d\x5c\xea\x1d\x36\xd2\xf3\x67\x98\x09\x07\xed\x32"); |
| ```"# |
| </span>)] |
| |
| </span><span class="doccomment">//! |
| //! ## Key wrapping |
| //! ```rust |
| //! use openssl::aes::{AesKey, unwrap_key, wrap_key}; |
| //! |
| //! let kek = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"; |
| //! let key_to_wrap = b"\x00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xAA\xBB\xCC\xDD\xEE\xFF"; |
| //! |
| //! let enc_key = AesKey::new_encrypt(kek).unwrap(); |
| //! let mut ciphertext = [0u8; 24]; |
| //! wrap_key(&enc_key, None, &mut ciphertext, &key_to_wrap[..]).unwrap(); |
| //! let dec_key = AesKey::new_decrypt(kek).unwrap(); |
| //! let mut orig_key = [0u8; 16]; |
| //! unwrap_key(&dec_key, None, &mut orig_key, &ciphertext[..]).unwrap(); |
| //! |
| //! assert_eq!(&orig_key[..], &key_to_wrap[..]); |
| //! ``` |
| //! |
| </span><span class="kw">use </span>cfg_if::cfg_if; |
| <span class="kw">use </span>libc::{c_int, c_uint}; |
| <span class="kw">use </span>std::mem::MaybeUninit; |
| <span class="kw">use </span>std::ptr; |
| |
| <span class="attribute">#[cfg(not(boringssl))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::symm::Mode; |
| <span class="kw">use </span>openssl_macros::corresponds; |
| |
| <span class="doccomment">/// Provides Error handling for parsing keys. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>KeyError(()); |
| |
| <span class="doccomment">/// The key used to encrypt or decrypt cipher blocks. |
| </span><span class="kw">pub struct </span>AesKey(ffi::AES_KEY); |
| |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(boringssl)] </span>{ |
| <span class="kw">type </span>AesBitType = c_uint; |
| <span class="kw">type </span>AesSizeType = usize; |
| } <span class="kw">else </span>{ |
| <span class="kw">type </span>AesBitType = c_int; |
| <span class="kw">type </span>AesSizeType = c_uint; |
| } |
| } |
| |
| <span class="kw">impl </span>AesKey { |
| <span class="doccomment">/// Prepares a key for encryption. |
| /// |
| /// # Failure |
| /// |
| /// Returns an error if the key is not 128, 192, or 256 bits. |
| </span><span class="attribute">#[corresponds(AES_set_encrypt_key)] |
| </span><span class="kw">pub fn </span>new_encrypt(key: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><AesKey, KeyError> { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(key.len() <= c_int::max_value() <span class="kw">as </span>usize / <span class="number">8</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>aes_key = MaybeUninit::uninit(); |
| <span class="kw">let </span>r = ffi::AES_set_encrypt_key( |
| key.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>, |
| key.len() <span class="kw">as </span>AesBitType * <span class="number">8</span>, |
| aes_key.as_mut_ptr(), |
| ); |
| <span class="kw">if </span>r == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(AesKey(aes_key.assume_init())) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(KeyError(())) |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Prepares a key for decryption. |
| /// |
| /// # Failure |
| /// |
| /// Returns an error if the key is not 128, 192, or 256 bits. |
| </span><span class="attribute">#[corresponds(AES_set_decrypt_key)] |
| </span><span class="kw">pub fn </span>new_decrypt(key: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><AesKey, KeyError> { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(key.len() <= c_int::max_value() <span class="kw">as </span>usize / <span class="number">8</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>aes_key = MaybeUninit::uninit(); |
| <span class="kw">let </span>r = ffi::AES_set_decrypt_key( |
| key.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>, |
| key.len() <span class="kw">as </span>AesBitType * <span class="number">8</span>, |
| aes_key.as_mut_ptr(), |
| ); |
| |
| <span class="kw">if </span>r == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(AesKey(aes_key.assume_init())) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(KeyError(())) |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Performs AES IGE encryption or decryption |
| /// |
| /// AES IGE (Infinite Garble Extension) is a form of AES block cipher utilized in |
| /// OpenSSL. Infinite Garble refers to propagating forward errors. IGE, like other |
| /// block ciphers implemented for AES requires an initialization vector. The IGE mode |
| /// allows a stream of blocks to be encrypted or decrypted without having the entire |
| /// plaintext available. For more information, visit [AES IGE Encryption]. |
| /// |
| /// This block cipher uses 16 byte blocks. The rust implementation will panic |
| /// if the input or output does not meet this 16-byte boundary. Attention must |
| /// be made in this low level implementation to pad the value to the 128-bit boundary. |
| /// |
| /// [AES IGE Encryption]: http://www.links.org/files/openssl-ige.pdf |
| /// |
| /// # Panics |
| /// |
| /// Panics if `in_` is not the same length as `out`, if that length is not a multiple of 16, or if |
| /// `iv` is not at least 32 bytes. |
| </span><span class="attribute">#[cfg(not(boringssl))] |
| #[cfg(not(osslconf = <span class="string">"OPENSSL_NO_DEPRECATED_3_0"</span>))] |
| #[corresponds(AES_ige_encrypt)] |
| </span><span class="kw">pub fn </span>aes_ige(in_: <span class="kw-2">&</span>[u8], out: <span class="kw-2">&mut </span>[u8], key: <span class="kw-2">&</span>AesKey, iv: <span class="kw-2">&mut </span>[u8], mode: Mode) { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(in_.len() == out.len()); |
| <span class="macro">assert!</span>(in_.len() % ffi::AES_BLOCK_SIZE <span class="kw">as </span>usize == <span class="number">0</span>); |
| <span class="macro">assert!</span>(iv.len() >= ffi::AES_BLOCK_SIZE <span class="kw">as </span>usize * <span class="number">2</span>); |
| |
| <span class="kw">let </span>mode = <span class="kw">match </span>mode { |
| Mode::Encrypt => ffi::AES_ENCRYPT, |
| Mode::Decrypt => ffi::AES_DECRYPT, |
| }; |
| ffi::AES_ige_encrypt( |
| in_.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>, |
| out.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, |
| in_.len(), |
| <span class="kw-2">&</span>key.<span class="number">0</span>, |
| iv.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, |
| mode, |
| ); |
| } |
| } |
| |
| <span class="doccomment">/// Wrap a key, according to [RFC 3394](https://tools.ietf.org/html/rfc3394) |
| /// |
| /// * `key`: The key-encrypting-key to use. Must be a encrypting key |
| /// * `iv`: The IV to use. You must use the same IV for both wrapping and unwrapping |
| /// * `out`: The output buffer to store the ciphertext |
| /// * `in_`: The input buffer, storing the key to be wrapped |
| /// |
| /// Returns the number of bytes written into `out` |
| /// |
| /// # Panics |
| /// |
| /// Panics if either `out` or `in_` do not have sizes that are a multiple of 8, or if |
| /// `out` is not 8 bytes longer than `in_` |
| </span><span class="attribute">#[corresponds(AES_wrap_key)] |
| </span><span class="kw">pub fn </span>wrap_key( |
| key: <span class="kw-2">&</span>AesKey, |
| iv: <span class="prelude-ty">Option</span><[u8; <span class="number">8</span>]>, |
| out: <span class="kw-2">&mut </span>[u8], |
| in_: <span class="kw-2">&</span>[u8], |
| ) -> <span class="prelude-ty">Result</span><usize, KeyError> { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(out.len() >= in_.len() + <span class="number">8</span>); <span class="comment">// Ciphertext is 64 bits longer (see 2.2.1) |
| |
| </span><span class="kw">let </span>written = ffi::AES_wrap_key( |
| <span class="kw-2">&</span>key.<span class="number">0 </span><span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span><span class="kw-2">*mut </span><span class="kw">_</span>, <span class="comment">// this is safe, the implementation only uses the key as a const pointer. |
| </span>iv.as_ref() |
| .map_or(ptr::null(), |iv| iv.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>), |
| out.as_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, |
| in_.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>, |
| in_.len() <span class="kw">as </span>AesSizeType, |
| ); |
| <span class="kw">if </span>written <= <span class="number">0 </span>{ |
| <span class="prelude-val">Err</span>(KeyError(())) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(written <span class="kw">as </span>usize) |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Unwrap a key, according to [RFC 3394](https://tools.ietf.org/html/rfc3394) |
| /// |
| /// * `key`: The key-encrypting-key to decrypt the wrapped key. Must be a decrypting key |
| /// * `iv`: The same IV used for wrapping the key |
| /// * `out`: The buffer to write the unwrapped key to |
| /// * `in_`: The input ciphertext |
| /// |
| /// Returns the number of bytes written into `out` |
| /// |
| /// # Panics |
| /// |
| /// Panics if either `out` or `in_` do not have sizes that are a multiple of 8, or |
| /// if `in_` is not 8 bytes longer than `out` |
| </span><span class="attribute">#[corresponds(AES_unwrap_key)] |
| </span><span class="kw">pub fn </span>unwrap_key( |
| key: <span class="kw-2">&</span>AesKey, |
| iv: <span class="prelude-ty">Option</span><[u8; <span class="number">8</span>]>, |
| out: <span class="kw-2">&mut </span>[u8], |
| in_: <span class="kw-2">&</span>[u8], |
| ) -> <span class="prelude-ty">Result</span><usize, KeyError> { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(out.len() + <span class="number">8 </span><= in_.len()); |
| |
| <span class="kw">let </span>written = ffi::AES_unwrap_key( |
| <span class="kw-2">&</span>key.<span class="number">0 </span><span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span><span class="kw-2">*mut </span><span class="kw">_</span>, <span class="comment">// this is safe, the implementation only uses the key as a const pointer. |
| </span>iv.as_ref() |
| .map_or(ptr::null(), |iv| iv.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>), |
| out.as_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, |
| in_.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_</span>, |
| in_.len() <span class="kw">as </span>AesSizeType, |
| ); |
| |
| <span class="kw">if </span>written <= <span class="number">0 </span>{ |
| <span class="prelude-val">Err</span>(KeyError(())) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(written <span class="kw">as </span>usize) |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use </span>hex::FromHex; |
| |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="attribute">#[cfg(not(boringssl))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::symm::Mode; |
| |
| <span class="comment">// From https://www.mgp25.com/AESIGE/ |
| </span><span class="attribute">#[test] |
| #[cfg(not(boringssl))] |
| #[cfg(not(osslconf = <span class="string">"OPENSSL_NO_DEPRECATED_3_0"</span>))] |
| </span><span class="kw">fn </span>ige_vector_1() { |
| <span class="kw">let </span>raw_key = <span class="string">"000102030405060708090A0B0C0D0E0F"</span>; |
| <span class="kw">let </span>raw_iv = <span class="string">"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"</span>; |
| <span class="kw">let </span>raw_pt = <span class="string">"0000000000000000000000000000000000000000000000000000000000000000"</span>; |
| <span class="kw">let </span>raw_ct = <span class="string">"1A8519A6557BE652E9DA8E43DA4EF4453CF456B4CA488AA383C79C98B34797CB"</span>; |
| |
| <span class="kw">let </span>key = AesKey::new_encrypt(<span class="kw-2">&</span>Vec::from_hex(raw_key).unwrap()).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>iv = Vec::from_hex(raw_iv).unwrap(); |
| <span class="kw">let </span>pt = Vec::from_hex(raw_pt).unwrap(); |
| <span class="kw">let </span>ct = Vec::from_hex(raw_ct).unwrap(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>ct_actual = <span class="macro">vec!</span>[<span class="number">0</span>; ct.len()]; |
| aes_ige(<span class="kw-2">&</span>pt, <span class="kw-2">&mut </span>ct_actual, <span class="kw-2">&</span>key, <span class="kw-2">&mut </span>iv, Mode::Encrypt); |
| <span class="macro">assert_eq!</span>(ct_actual, ct); |
| |
| <span class="kw">let </span>key = AesKey::new_decrypt(<span class="kw-2">&</span>Vec::from_hex(raw_key).unwrap()).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>iv = Vec::from_hex(raw_iv).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>pt_actual = <span class="macro">vec!</span>[<span class="number">0</span>; pt.len()]; |
| aes_ige(<span class="kw-2">&</span>ct, <span class="kw-2">&mut </span>pt_actual, <span class="kw-2">&</span>key, <span class="kw-2">&mut </span>iv, Mode::Decrypt); |
| <span class="macro">assert_eq!</span>(pt_actual, pt); |
| } |
| |
| <span class="comment">// from the RFC https://tools.ietf.org/html/rfc3394#section-2.2.3 |
| </span><span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_wrap_unwrap() { |
| <span class="kw">let </span>raw_key = Vec::from_hex(<span class="string">"000102030405060708090A0B0C0D0E0F"</span>).unwrap(); |
| <span class="kw">let </span>key_data = Vec::from_hex(<span class="string">"00112233445566778899AABBCCDDEEFF"</span>).unwrap(); |
| <span class="kw">let </span>expected_ciphertext = |
| Vec::from_hex(<span class="string">"1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5"</span>).unwrap(); |
| |
| <span class="kw">let </span>enc_key = AesKey::new_encrypt(<span class="kw-2">&</span>raw_key).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>wrapped = [<span class="number">0</span>; <span class="number">24</span>]; |
| <span class="macro">assert_eq!</span>( |
| wrap_key(<span class="kw-2">&</span>enc_key, <span class="prelude-val">None</span>, <span class="kw-2">&mut </span>wrapped, <span class="kw-2">&</span>key_data).unwrap(), |
| <span class="number">24 |
| </span>); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>wrapped[..], <span class="kw-2">&</span>expected_ciphertext[..]); |
| |
| <span class="kw">let </span>dec_key = AesKey::new_decrypt(<span class="kw-2">&</span>raw_key).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>unwrapped = [<span class="number">0</span>; <span class="number">16</span>]; |
| <span class="macro">assert_eq!</span>( |
| unwrap_key(<span class="kw-2">&</span>dec_key, <span class="prelude-val">None</span>, <span class="kw-2">&mut </span>unwrapped, <span class="kw-2">&</span>wrapped).unwrap(), |
| <span class="number">16 |
| </span>); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>unwrapped[..], <span class="kw-2">&</span>key_data[..]); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="openssl" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
