├── .gitignore ├── Cargo.toml ├── .github └── workflows │ └── build.yml ├── LICENSE-MIT ├── CHANGELOG.md ├── README.md ├── LICENSE-APACHE ├── tests └── aes.rs └── src └── lib.rs /.gitignore: -------------------------------------------------------------------------------- 1 | Cargo.lock 2 | /target 3 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "libaes" 3 | version = "0.7.0" 4 | authors = ["Han Xu "] 5 | edition = "2018" 6 | description = "AES cipher in safe Rust with no dependencies" 7 | license = "Apache-2.0 OR MIT" 8 | repository = "https://github.com/keepsimple1/libaes" 9 | documentation = "https://docs.rs/libaes" 10 | keywords = ["crypto", "aes", "block-cipher"] 11 | categories = ["cryptography"] 12 | readme = "README.md" 13 | -------------------------------------------------------------------------------- /.github/workflows/build.yml: -------------------------------------------------------------------------------- 1 | name: Build and Test 2 | 3 | on: 4 | push: 5 | branches: [ master ] 6 | pull_request: 7 | branches: [ master ] 8 | 9 | env: 10 | CARGO_TERM_COLOR: always 11 | 12 | jobs: 13 | build: 14 | 15 | runs-on: ubuntu-20.04 16 | 17 | steps: 18 | - uses: actions/checkout@v2 19 | - name: Install Rust version 20 | run: rustup toolchain install 1.46.0 21 | - name: Select Rust version 22 | run: rustup default 1.46.0 23 | - name: Install clippy 24 | run: rustup component add clippy 25 | - name: Install cargo fmt 26 | run: rustup component add rustfmt 27 | - name: Run cargo fmt and fail if any warnings 28 | run: cargo fmt -- --check 29 | - name: Build 30 | run: cargo build 31 | - name: Run tests 32 | run: cargo test 33 | - name: Run Clippy 34 | run: cargo clippy 35 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | Permission is hereby granted, free of charge, to any 2 | person obtaining a copy of this software and associated 3 | documentation files (the "Software"), to deal in the 4 | Software without restriction, including without 5 | limitation the rights to use, copy, modify, merge, 6 | publish, distribute, sublicense, and/or sell copies of 7 | the Software, and to permit persons to whom the Software 8 | is furnished to do so, subject to the following 9 | conditions: 10 | 11 | The above copyright notice and this permission notice 12 | shall be included in all copies or substantial portions 13 | of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF 16 | ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 17 | TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 18 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT 19 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 20 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 22 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 | DEALINGS IN THE SOFTWARE. 24 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Version 0.7.0 2 | No breaking changes. Bumped the minor version because of a new API of padding. 3 | 4 | - support changing auto_padding setting in CBC mode (#30) 5 | 6 | # Version 0.6.5 7 | - Handles empty data gracefully in unpad() (#22) 8 | - Fix build warnings in recent Rust 1.69 (#23) 9 | - Add a test case for empty data in CBC (#24) 10 | 11 | # Version 0.6.4 12 | - Enable cargo fmt check (#19) 13 | 14 | # Version 0.6.3 15 | - check input length in decrypt (#17) 16 | 17 | # Verison 0.6.2 18 | - add keyword and category (#15) 19 | 20 | # Version 0.6.1 21 | - Fix a typo 22 | 23 | # Version 0.6.0 24 | - Reverse API change in 0.5.0 25 | 26 | # Version 0.5.0 27 | - API change: return an error type for cbc_decrypt 28 | - Update README 29 | 30 | # Version 0.4.0 31 | 32 | - Add support for CFB128 mode 33 | 34 | # Version 0.3.0 35 | 36 | - Add support for 192-bit keys 37 | 38 | # Version 0.2.0 39 | 40 | - Add support for 256-bit keys 41 | 42 | # Version 0.1.2 43 | 44 | - Add missing crates.io doc link 45 | 46 | # Version 0.1.1 47 | 48 | - Add missing fields in Cargo publish 49 | 50 | # Version 0.1.0 51 | 52 | - Initial version 53 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # libaes 2 | 3 | [![Build](https://github.com/keepsimple1/libaes/workflows/Build%20and%20Test/badge.svg)](https://github.com/keepsimple1/libaes/actions) 4 | [![Cargo](https://img.shields.io/crates/v/libaes.svg)](https://crates.io/crates/libaes) 5 | 6 | This is a small implementation of AES in safe Rust, with no dependencies. The core algorithm is ported 7 | from AES core of [OpenSSL 1.1.1 stable](https://github.com/openssl/openssl/blob/OpenSSL_1_1_1-stable/crypto/aes/aes_core.c). 8 | It is hardware-independent and fast (for example, as of January 2021, its AES-128 CBC mode is more than 3X faster than 9 | RustCrypto [`aes`](https://crates.io/crates/aes) + [`block-modes`](https://crates.io/crates/block-modes) crates, 10 | see [benchmark](https://github.com/keepsimple1/libaes-utils/blob/main/README.md#Benchmark)). 11 | 12 | Currently, this library supports: 13 | 14 | - CBC mode: 128-bit, 192-bit and 256-bit keys 15 | - CFB128 mode 16 | 17 | See [Documentation](https://docs.rs/libaes/) for examples and [tests](tests). 18 | 19 | ## Correctness 20 | 21 | We use the test data in NIST Special Publication 800-38A to verify the cipher, see the [test code](tests/aes.rs). 22 | 23 | ## Minimum Rust version 24 | 25 | Tested against Rust 1.46.0 26 | 27 | ## License 28 | 29 | Licensed under either of 30 | 31 | * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) 32 | * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) 33 | 34 | at your option. 35 | 36 | ### Contribution 37 | 38 | Contributions are welcome! 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /tests/aes.rs: -------------------------------------------------------------------------------- 1 | use libaes::{Cipher, AES_128_KEY_LEN, AES_192_KEY_LEN, AES_256_KEY_LEN}; 2 | 3 | const NIST_AES_128_KEY: &[u8; AES_128_KEY_LEN] = 4 | b"\x2b\x7e\x15\x16\x28\xae\xd2\xa6\xab\xf7\x15\x88\x09\xcf\x4f\x3c"; 5 | const NIST_AES_192_KEY: &[u8; AES_192_KEY_LEN] = 6 | b"\x8e\x73\xb0\xf7\xda\x0e\x64\x52\xc8\x10\xf3\x2b\x80\x90\x79\xe5\ 7 | \x62\xf8\xea\xd2\x52\x2c\x6b\x7b"; 8 | const NIST_AES_256_KEY: &[u8; AES_256_KEY_LEN] = 9 | b"\x60\x3d\xeb\x10\x15\xca\x71\xbe\x2b\x73\xae\xf0\x85\x7d\x77\x81\ 10 | \x1f\x35\x2c\x07\x3b\x61\x08\xd7\x2d\x98\x10\xa3\x09\x14\xdf\xf4"; 11 | 12 | const NIST_IV: &[u8; 16] = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"; 13 | 14 | #[test] 15 | fn nist_verify_aes_128_cbc() { 16 | // Verify the implementation's correctness using NIST Special Publication 800-38A: 17 | // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf 18 | // Appendix F.2.1 and F.2.2 CBC Example Vectors 19 | let plaintext = b"\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a\ 20 | \xae\x2d\x8a\x57\x1e\x03\xac\x9c\x9e\xb7\x6f\xac\x45\xaf\x8e\x51\ 21 | \x30\xc8\x1c\x46\xa3\x5c\xe4\x11\xe5\xfb\xc1\x19\x1a\x0a\x52\xef\ 22 | \xf6\x9f\x24\x45\xdf\x4f\x9b\x17\xad\x2b\x41\x7b\xe6\x6c\x37\x10"; 23 | let ciphertext = b"\x76\x49\xab\xac\x81\x19\xb2\x46\xce\xe9\x8e\x9b\x12\xe9\x19\x7d\ 24 | \x50\x86\xcb\x9b\x50\x72\x19\xee\x95\xdb\x11\x3a\x91\x76\x78\xb2\ 25 | \x73\xbe\xd6\xb8\xe3\xc1\x74\x3b\x71\x16\xe6\x9e\x22\x22\x95\x16\ 26 | \x3f\xf1\xca\xa1\x68\x1f\xac\x09\x12\x0e\xca\x30\x75\x86\xe1\xa7"; 27 | 28 | let cipher = Cipher::new_128(NIST_AES_128_KEY); 29 | let encrypted = cipher.cbc_encrypt(NIST_IV, plaintext); 30 | let len_without_padding = 16 * 4; 31 | let padding_size = 16; 32 | assert_eq!(encrypted.len(), len_without_padding + padding_size); 33 | assert_eq!(encrypted[..len_without_padding], ciphertext[..]); 34 | 35 | let decrypted = cipher.cbc_decrypt(NIST_IV, &encrypted[..]); 36 | assert_eq!(decrypted[..], plaintext[..]); 37 | } 38 | 39 | #[test] 40 | fn nist_verify_aes_192_cbc() { 41 | // Verify the implementation's correctness using NIST Special Publication 800-38A: 42 | // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf 43 | // Appendix F.2.3 and F.2.4 CBC Example Vectors for 192-bit 44 | let plaintext = b"\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a\ 45 | \xae\x2d\x8a\x57\x1e\x03\xac\x9c\x9e\xb7\x6f\xac\x45\xaf\x8e\x51\ 46 | \x30\xc8\x1c\x46\xa3\x5c\xe4\x11\xe5\xfb\xc1\x19\x1a\x0a\x52\xef\ 47 | \xf6\x9f\x24\x45\xdf\x4f\x9b\x17\xad\x2b\x41\x7b\xe6\x6c\x37\x10"; 48 | let ciphertext = b"\x4f\x02\x1d\xb2\x43\xbc\x63\x3d\x71\x78\x18\x3a\x9f\xa0\x71\xe8\ 49 | \xb4\xd9\xad\xa9\xad\x7d\xed\xf4\xe5\xe7\x38\x76\x3f\x69\x14\x5a\ 50 | \x57\x1b\x24\x20\x12\xfb\x7a\xe0\x7f\xa9\xba\xac\x3d\xf1\x02\xe0\ 51 | \x08\xb0\xe2\x79\x88\x59\x88\x81\xd9\x20\xa9\xe6\x4f\x56\x15\xcd"; 52 | let cipher = Cipher::new_192(NIST_AES_192_KEY); 53 | let encrypted = cipher.cbc_encrypt(NIST_IV, plaintext); 54 | let len_without_padding = 16 * 4; 55 | let padding_size = 16; 56 | assert_eq!(encrypted.len(), len_without_padding + padding_size); 57 | assert_eq!(encrypted[..len_without_padding], ciphertext[..]); 58 | 59 | let decrypted = cipher.cbc_decrypt(NIST_IV, &encrypted[..]); 60 | assert_eq!(decrypted[..], plaintext[..]); 61 | } 62 | 63 | #[test] 64 | fn nist_verify_aes_256_cbc() { 65 | // Verify the implementation's correctness using NIST Special Publication 800-38A: 66 | // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf 67 | // Appendix F.2.5 and F.2.6 CBC Example Vectors 68 | let plaintext = b"\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a\ 69 | \xae\x2d\x8a\x57\x1e\x03\xac\x9c\x9e\xb7\x6f\xac\x45\xaf\x8e\x51\ 70 | \x30\xc8\x1c\x46\xa3\x5c\xe4\x11\xe5\xfb\xc1\x19\x1a\x0a\x52\xef\ 71 | \xf6\x9f\x24\x45\xdf\x4f\x9b\x17\xad\x2b\x41\x7b\xe6\x6c\x37\x10"; 72 | let ciphertext = b"\xf5\x8c\x4c\x04\xd6\xe5\xf1\xba\x77\x9e\xab\xfb\x5f\x7b\xfb\xd6\ 73 | \x9c\xfc\x4e\x96\x7e\xdb\x80\x8d\x67\x9f\x77\x7b\xc6\x70\x2c\x7d\ 74 | \x39\xf2\x33\x69\xa9\xd9\xba\xcf\xa5\x30\xe2\x63\x04\x23\x14\x61\ 75 | \xb2\xeb\x05\xe2\xc3\x9b\xe9\xfc\xda\x6c\x19\x07\x8c\x6a\x9d\x1b"; 76 | let cipher = Cipher::new_256(NIST_AES_256_KEY); 77 | let encrypted = cipher.cbc_encrypt(NIST_IV, plaintext); 78 | let len_without_padding = 16 * 4; 79 | let padding_size = 16; 80 | assert_eq!(encrypted.len(), len_without_padding + padding_size); 81 | assert_eq!(encrypted[..len_without_padding], ciphertext[..]); 82 | 83 | let decrypted = cipher.cbc_decrypt(NIST_IV, &encrypted[..]); 84 | assert_eq!(decrypted[..], plaintext[..]); 85 | } 86 | 87 | #[test] 88 | fn nist_verify_aes_128_cfb_128() { 89 | // Verify the implementation's correctness using NIST Special Publication 800-38A: 90 | // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf 91 | // Appendix F.3.13 and F.3.14 CFB_128 AES-128 Examples 92 | let plaintext = b"\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a\ 93 | \xae\x2d\x8a\x57\x1e\x03\xac\x9c\x9e\xb7\x6f\xac\x45\xaf\x8e\x51\ 94 | \x30\xc8\x1c\x46\xa3\x5c\xe4\x11\xe5\xfb\xc1\x19\x1a\x0a\x52\xef\ 95 | \xf6\x9f\x24\x45\xdf\x4f\x9b\x17\xad\x2b\x41\x7b\xe6\x6c\x37\x10"; 96 | let ciphertext = b"\x3b\x3f\xd9\x2e\xb7\x2d\xad\x20\x33\x34\x49\xf8\xe8\x3c\xfb\x4a\ 97 | \xc8\xa6\x45\x37\xa0\xb3\xa9\x3f\xcd\xe3\xcd\xad\x9f\x1c\xe5\x8b\ 98 | \x26\x75\x1f\x67\xa3\xcb\xb1\x40\xb1\x80\x8c\xf1\x87\xa4\xf4\xdf\ 99 | \xc0\x4b\x05\x35\x7c\x5d\x1c\x0e\xea\xc4\xc6\x6f\x9f\xf7\xf2\xe6"; 100 | 101 | let cipher = Cipher::new_128(NIST_AES_128_KEY); 102 | let encrypted = cipher.cfb128_encrypt(NIST_IV, plaintext); 103 | assert_eq!(encrypted[..], ciphertext[..]); 104 | 105 | let decrypted = cipher.cfb128_decrypt(NIST_IV, ciphertext); 106 | assert_eq!(decrypted[..], plaintext[..]); 107 | } 108 | 109 | #[test] 110 | fn nist_verify_aes_192_cfb_128() { 111 | // Verify the implementation's correctness using NIST Special Publication 800-38A: 112 | // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf 113 | // Appendix F.3.15 and F.3.16 CFB_128 AES-192 Examples 114 | let plaintext = b"\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a\ 115 | \xae\x2d\x8a\x57\x1e\x03\xac\x9c\x9e\xb7\x6f\xac\x45\xaf\x8e\x51\ 116 | \x30\xc8\x1c\x46\xa3\x5c\xe4\x11\xe5\xfb\xc1\x19\x1a\x0a\x52\xef\ 117 | \xf6\x9f\x24\x45\xdf\x4f\x9b\x17\xad\x2b\x41\x7b\xe6\x6c\x37\x10"; 118 | let ciphertext = b"\xcd\xc8\x0d\x6f\xdd\xf1\x8c\xab\x34\xc2\x59\x09\xc9\x9a\x41\x74\ 119 | \x67\xce\x7f\x7f\x81\x17\x36\x21\x96\x1a\x2b\x70\x17\x1d\x3d\x7a\ 120 | \x2e\x1e\x8a\x1d\xd5\x9b\x88\xb1\xc8\xe6\x0f\xed\x1e\xfa\xc4\xc9\ 121 | \xc0\x5f\x9f\x9c\xa9\x83\x4f\xa0\x42\xae\x8f\xba\x58\x4b\x09\xff"; 122 | let cipher = Cipher::new_192(NIST_AES_192_KEY); 123 | let encrypted = cipher.cfb128_encrypt(NIST_IV, plaintext); 124 | assert_eq!(encrypted[..], ciphertext[..]); 125 | 126 | let decrypted = cipher.cfb128_decrypt(NIST_IV, ciphertext); 127 | assert_eq!(decrypted[..], plaintext[..]); 128 | } 129 | 130 | #[test] 131 | fn nist_verify_aes_256_cfb_128() { 132 | // Verify the implementation's correctness using NIST Special Publication 800-38A: 133 | // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf 134 | // Appendix F.3.17 and F.3.18 CFB_128 AES-256 Examples 135 | let plaintext = b"\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a\ 136 | \xae\x2d\x8a\x57\x1e\x03\xac\x9c\x9e\xb7\x6f\xac\x45\xaf\x8e\x51\ 137 | \x30\xc8\x1c\x46\xa3\x5c\xe4\x11\xe5\xfb\xc1\x19\x1a\x0a\x52\xef\ 138 | \xf6\x9f\x24\x45\xdf\x4f\x9b\x17\xad\x2b\x41\x7b\xe6\x6c\x37\x10"; 139 | let ciphertext = b"\xdc\x7e\x84\xbf\xda\x79\x16\x4b\x7e\xcd\x84\x86\x98\x5d\x38\x60\ 140 | \x39\xff\xed\x14\x3b\x28\xb1\xc8\x32\x11\x3c\x63\x31\xe5\x40\x7b\ 141 | \xdf\x10\x13\x24\x15\xe5\x4b\x92\xa1\x3e\xd0\xa8\x26\x7a\xe2\xf9\ 142 | \x75\xa3\x85\x74\x1a\xb9\xce\xf8\x20\x31\x62\x3d\x55\xb1\xe4\x71"; 143 | let cipher = Cipher::new_256(NIST_AES_256_KEY); 144 | let encrypted = cipher.cfb128_encrypt(NIST_IV, plaintext); 145 | assert_eq!(encrypted[..], ciphertext[..]); 146 | 147 | let decrypted = cipher.cfb128_decrypt(NIST_IV, ciphertext); 148 | assert_eq!(decrypted[..], plaintext[..]); 149 | } 150 | 151 | #[test] 152 | fn empty_data() { 153 | // Encrypt an input that is empty, i.e. zero bytes. 154 | let key_128 = b"This is the key!"; // key is 16 bytes 155 | let cipher = Cipher::new_128(key_128); 156 | let plaintext = b""; // less than 16 bytes 157 | let iv = b"This is 16 bytes"; 158 | let encrypted_128 = cipher.cbc_encrypt(iv, plaintext); 159 | assert_eq!(encrypted_128.len(), 16); // Verify padding 160 | let decrypted_128 = cipher.cbc_decrypt(iv, &encrypted_128[..]); 161 | assert_eq!(decrypted_128, plaintext); 162 | } 163 | 164 | #[test] 165 | fn small_data() { 166 | // Encrypt and decrypt data that is smaller than 1 AES block size. 167 | let key_128 = b"This is the key!"; // key is 16 bytes 168 | let cipher = Cipher::new_128(key_128); 169 | let plaintext = b"A plaintext"; // less than 16 bytes 170 | let iv = b"This is 16 bytes"; 171 | let encrypted_128 = cipher.cbc_encrypt(iv, plaintext); 172 | assert_eq!(encrypted_128.len(), 16); // Verify padding 173 | let decrypted_128 = cipher.cbc_decrypt(iv, &encrypted_128[..]); 174 | assert_eq!(decrypted_128[..], plaintext[..]); 175 | 176 | // Test with AES-256 CBC 177 | let key_256 = b"This is the key!This is the key!"; 178 | let cipher = Cipher::new_256(key_256); 179 | let encrypted_256 = cipher.cbc_encrypt(iv, plaintext); 180 | assert_eq!(encrypted_256.len(), 16); // Verify padding 181 | assert_ne!(encrypted_256[..], encrypted_128[..]); // Verify AES-256 is different from AES-128 182 | let decrypted_256 = cipher.cbc_decrypt(iv, &encrypted_256[..]); 183 | assert_eq!(decrypted_256[..], plaintext[..]); 184 | 185 | // Test with AES-192 CBC 186 | let key_192 = b"This is the key! 192 bit"; 187 | let cipher = Cipher::new_192(key_192); 188 | let encrypted_192 = cipher.cbc_encrypt(iv, plaintext); 189 | assert_eq!(encrypted_192.len(), 16); // Verify padding 190 | assert_ne!(encrypted_192[..], encrypted_256[..]); // Verify AES-192 is different from AES-256 191 | let decrypted_192 = cipher.cbc_decrypt(iv, &encrypted_192[..]); 192 | assert_eq!(decrypted_192[..], plaintext[..]); 193 | 194 | // Test with AES-128 CFB128 195 | let cipher = Cipher::new_128(key_128); 196 | let encrypted_cfb128 = cipher.cfb128_encrypt(iv, plaintext); 197 | assert_eq!(encrypted_cfb128.len(), plaintext.len()); 198 | assert_ne!(encrypted_128[..], encrypted_cfb128[..]); 199 | let decrypted_cfb128 = cipher.cfb128_decrypt(iv, &encrypted_cfb128[..]); 200 | assert_eq!(decrypted_cfb128[..], plaintext[..]); 201 | 202 | // Test with AES-192 CFB128 203 | let cipher = Cipher::new_192(key_192); 204 | let encrypted_192 = cipher.cfb128_encrypt(iv, plaintext); 205 | assert_eq!(encrypted_192.len(), plaintext.len()); 206 | assert_ne!(encrypted_192[..], encrypted_cfb128[..]); 207 | let decrypted_192 = cipher.cfb128_decrypt(iv, &encrypted_192[..]); 208 | assert_eq!(decrypted_192[..], plaintext[..]); 209 | 210 | // Test with AES-256 CFB128 211 | let cipher = Cipher::new_256(key_256); 212 | let encrypted_256 = cipher.cfb128_encrypt(iv, plaintext); 213 | assert_eq!(encrypted_256.len(), plaintext.len()); 214 | assert_ne!(encrypted_256[..], encrypted_192[..]); 215 | let decrypted_256 = cipher.cfb128_decrypt(iv, &encrypted_256[..]); 216 | assert_eq!(decrypted_256[..], plaintext[..]); 217 | } 218 | 219 | #[test] 220 | fn large_data() { 221 | // Encrypt and decrypt data that is larger than 10 blocks. 222 | let key_128 = b"This is the key!"; 223 | let iv = b"This is 16 bytes"; 224 | let plaintext = b"The Road Not Taken - by Robert Frost\ 225 | Two roads diverged in a yellow wood,\ 226 | And sorry I could not travel both\ 227 | And be one traveler, long I stood\ 228 | And looked down one as far as I could\ 229 | To where it bent in the undergrowth;\ 230 | Then took the other, as just as fair,\ 231 | And having perhaps the better claim,\ 232 | Because it was grassy and wanted wear;\ 233 | Though as for that the passing there\ 234 | Had worn them really about the same,\ 235 | And both that morning equally lay\ 236 | In leaves no step had trodden black.\ 237 | Oh, I kept the first for another day!\ 238 | Yet knowing how way leads on to way,\ 239 | I doubted if I should ever come back.\ 240 | I shall be telling this with a sigh\ 241 | Somewhere ages and ages hence:\ 242 | Two roads diverged in a wood, and I\ 243 | I took the one less traveled by,\ 244 | And that has made all the difference."; 245 | let cipher = Cipher::new_128(key_128); 246 | let encrypted_128 = cipher.cbc_encrypt(iv, plaintext); 247 | let decrypted_128 = cipher.cbc_decrypt(iv, &encrypted_128[..]); 248 | assert_eq!(decrypted_128[..], plaintext[..]); 249 | 250 | // Test with AES-256 251 | let key_256 = b"This is the key!This is the key!"; 252 | let cipher = Cipher::new_256(key_256); 253 | let encrypted_256 = cipher.cbc_encrypt(iv, plaintext); 254 | assert_eq!(encrypted_256.len(), encrypted_128.len()); 255 | assert_ne!(encrypted_256[..], encrypted_128[..]); 256 | let decrypted_256 = cipher.cbc_decrypt(iv, &encrypted_256[..]); 257 | assert_eq!(decrypted_256[..], plaintext[..]); 258 | 259 | // Test with AES-192 260 | let key_192 = b"This is the key! 192 bit"; 261 | let cipher = Cipher::new_192(key_192); 262 | let encrypted_192 = cipher.cbc_encrypt(iv, plaintext); 263 | assert_eq!(encrypted_192.len(), encrypted_256.len()); 264 | assert_ne!(encrypted_192[..], encrypted_256[..]); 265 | let decrypted_192 = cipher.cbc_decrypt(iv, &encrypted_192[..]); 266 | assert_eq!(decrypted_192[..], plaintext[..]); 267 | 268 | // Test with AES-128 CFB128 269 | let cipher = Cipher::new_128(key_128); 270 | let encrypted_cfb128 = cipher.cfb128_encrypt(iv, plaintext); 271 | assert_eq!(encrypted_cfb128.len(), plaintext.len()); 272 | let decrypted_cfb128 = cipher.cfb128_decrypt(iv, &encrypted_cfb128); 273 | assert_eq!(decrypted_cfb128[..], plaintext[..]); 274 | 275 | // Test with AES-192 CFB128 276 | let cipher = Cipher::new_192(key_192); 277 | let encrypted_192 = cipher.cfb128_encrypt(iv, plaintext); 278 | assert_eq!(encrypted_192.len(), plaintext.len()); 279 | assert_ne!(encrypted_192[..], encrypted_cfb128[..]); 280 | let decrypted_192 = cipher.cfb128_decrypt(iv, &encrypted_192); 281 | assert_eq!(decrypted_192[..], plaintext[..]); 282 | 283 | // Test with AES-256 CFB128 284 | let cipher = Cipher::new_256(key_256); 285 | let encrypted_256 = cipher.cfb128_encrypt(iv, plaintext); 286 | assert_eq!(encrypted_256.len(), plaintext.len()); 287 | assert_ne!(encrypted_256[..], encrypted_192[..]); 288 | let decrypted_256 = cipher.cfb128_decrypt(iv, &encrypted_256); 289 | assert_eq!(decrypted_256[..], plaintext[..]); 290 | } 291 | 292 | #[test] 293 | fn invalid_key_decrypt() { 294 | // Encrypt with the original key 295 | 296 | let key_128 = b"k123456789012345"; // key is 16 bytes 297 | let cipher = Cipher::new_128(key_128); 298 | let plaintext = b"m2"; // a very small message 299 | let iv = b"v123456789012345"; 300 | let encrypted_128 = cipher.cbc_encrypt(iv, plaintext); 301 | assert_eq!(encrypted_128.len(), 16); // Verify padding 302 | 303 | // Try to decrypt with an invalid key 304 | 305 | let invalid_key = b"k123456789012347"; 306 | let cipher = Cipher::new_128(invalid_key); 307 | let decrypted_128 = cipher.cbc_decrypt(iv, &encrypted_128[..]); 308 | assert!(decrypted_128.is_empty()); 309 | } 310 | 311 | #[test] 312 | fn invalid_input_decrypt() { 313 | let key_128 = b"k123456789012345"; 314 | let cipher = Cipher::new_128(key_128); 315 | let iv = b"v123456789012345"; 316 | let bad_ciphertext = b"foo"; 317 | let decrypted = cipher.cbc_decrypt(iv, &bad_ciphertext[..]); 318 | assert!(decrypted.is_empty()); 319 | 320 | let empty_ciphertext = b""; 321 | let decrypted = cipher.cbc_decrypt(iv, &empty_ciphertext[..]); 322 | assert!(decrypted.is_empty()); 323 | } 324 | 325 | #[test] 326 | fn cbc_without_auto_padding() { 327 | let plaintext: &[u8; 16] = b"\x59\xf9\x62\x18\xd8\xec\xca\xb2\x77\xed\x47\x7a\x33\xdc\xb7\xf3"; 328 | let ciphertext: &[u8; 16] = b"\x9f\x27\x07\xbc\x98\xbb\x57\x81\xd4\xe7\xb4\x61\xbf\xfe\x62\x70"; 329 | let key: &[u8; 16] = b"\x64\xc5\xfd\x55\xdd\x3a\xd9\x88\x32\x5b\xaa\xec\x52\x43\xdb\x98"; 330 | let iv: &[u8; 16] = b"\x00\x04\x00\x8c\x00\x16\x58\x00\x00\x00\x00\x00\x00\x00\x00\x00"; 331 | 332 | // create a cipher and disable its auto_padding. 333 | let mut aes: Cipher = Cipher::new_128(key); 334 | aes.set_auto_padding(false); 335 | 336 | // verify decrypt. 337 | let decrypted = aes.cbc_decrypt(iv, ciphertext); 338 | assert_eq!(&decrypted, plaintext); 339 | 340 | // verify encrypt. 341 | let encrypted = aes.cbc_encrypt(iv, plaintext); 342 | assert_eq!(&encrypted, ciphertext); 343 | 344 | // encrypt returns empty if the plaintext is not valid block-sized. 345 | let invalidblock: &[u8; 10] = b"\x59\xf9\x62\x18\xd8\xec\xca\xb2\x77\xed"; 346 | let encrypted = aes.cbc_encrypt(iv, invalidblock); 347 | assert!(encrypted.is_empty()); 348 | } 349 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | // Copyright 2020 Han Xu 2 | // 3 | // This Rust implementation is ported from the C version in OpenSSL 1.1.1 stable AES core. 4 | // Please see README.md for license info. 5 | 6 | //! A safe and small Rust implementation of AES cipher. 7 | //! 8 | //! This Rust implementation is ported from the C implementation in [OpenSSL 1.1.1 stable](https://github.com/openssl/openssl/blob/OpenSSL_1_1_1-stable/crypto/aes/aes_core.c) 9 | //! with these highlights: 10 | //! 11 | //! - Safe Rust code only. 12 | //! - Zero dependencies. 13 | //! - Fast (thanks to algorithms in OpenSSL 1.1.1, see some [benchmark](https://github.com/keepsimple1/libaes-utils/blob/main/README.md#Benchmark)). 14 | //! 15 | //! Currently, this cipher supports 128-bit, 192-bit and 256-bit keys with the following modes: 16 | //! 17 | //! - CBC mode: automatic padding is included. 18 | //! - CFB mode: no padding as it is not needed. Only 128-bit segment size (i.e. CFB128) is supported. 19 | //! 20 | //! # Examples 21 | //! 22 | //! ``` 23 | //! // Example for AES-128 CBC mode 24 | //! 25 | //! use libaes::Cipher; 26 | //! 27 | //! let my_key = b"This is the key!"; // key is 16 bytes, i.e. 128-bit 28 | //! let plaintext = b"A plaintext"; 29 | //! let iv = b"This is 16 bytes"; 30 | //! 31 | //! // Create a new 128-bit cipher 32 | //! let cipher = Cipher::new_128(my_key); 33 | //! 34 | //! // Encryption 35 | //! let encrypted = cipher.cbc_encrypt(iv, plaintext); 36 | //! 37 | //! // Decryption 38 | //! let decrypted = cipher.cbc_decrypt(iv, &encrypted[..]); 39 | //! ``` 40 | 41 | #![forbid(unsafe_code)] 42 | 43 | /// 128-bit are 16 bytes 44 | pub const AES_128_KEY_LEN: usize = 16; 45 | /// 192-bit are 24 bytes 46 | pub const AES_192_KEY_LEN: usize = 24; 47 | /// 256-bit are 32 bytes 48 | pub const AES_256_KEY_LEN: usize = 32; 49 | 50 | const AES_BLOCK_SIZE: usize = 16; // in bytes 51 | const AES_MAX_ROUNDS: usize = 14; // 14 rounds for 256-bit keys 52 | const RD_KEY_MAX_SIZE: usize = 4 * (AES_MAX_ROUNDS + 1); 53 | 54 | /// AES cipher struct 55 | /// 56 | /// The user would create a cipher first by calling `new_()` (e.g. `new_128()`), and then 57 | /// call encrypt and/or decrypt methods as needed. 58 | pub struct Cipher { 59 | encrypt_key: AesKey, 60 | decrypt_key: AesKey, 61 | 62 | /// By default, this is true. It is only used in CBC mode now. 63 | auto_padding: bool, 64 | } 65 | 66 | impl Cipher { 67 | /// Create an AES 128-bit cipher with a given key. 68 | /// 69 | /// Once created, a cipher can encrypt or decrypt any times of data using the same key. 70 | /// `user_key` must be at length of 128-bits, i.e. 16 bytes. 71 | /// 72 | /// # Examples 73 | /// 74 | /// ``` 75 | /// use libaes::Cipher; 76 | /// 77 | /// let my_key = b"This is the key!"; // 16 bytes 78 | /// let cipher = Cipher::new_128(my_key); 79 | /// ``` 80 | pub fn new_128(user_key: &[u8; AES_128_KEY_LEN]) -> Cipher { 81 | let mut encrypt_key = AesKey { 82 | rd_key: [0; RD_KEY_MAX_SIZE], 83 | rounds: 0, 84 | }; 85 | aes_set_encrypt_key(user_key, 128, &mut encrypt_key); 86 | 87 | let mut decrypt_key = AesKey { 88 | rd_key: [0; RD_KEY_MAX_SIZE], 89 | rounds: 0, 90 | }; 91 | aes_set_decrypt_key(user_key, 128, &mut decrypt_key); 92 | 93 | Cipher { 94 | encrypt_key, 95 | decrypt_key, 96 | auto_padding: true, 97 | } 98 | } 99 | 100 | /// Create an AES 192-bit cipher with a given key. 101 | /// 102 | /// Once created, a cipher can encrypt or decrypt any times of data using the same key. 103 | /// `user_key` must be at length of 192-bits, i.e. 24 bytes. 104 | /// 105 | /// # Examples 106 | /// 107 | /// ``` 108 | /// use libaes::Cipher; 109 | /// 110 | /// let my_key = b"This is the key! 192 bit"; // 24 bytes 111 | /// let cipher = Cipher::new_192(my_key); 112 | /// ``` 113 | pub fn new_192(user_key: &[u8; AES_192_KEY_LEN]) -> Cipher { 114 | let mut encrypt_key = AesKey { 115 | rd_key: [0; RD_KEY_MAX_SIZE], 116 | rounds: 0, 117 | }; 118 | aes_set_encrypt_key(user_key, 192, &mut encrypt_key); 119 | 120 | let mut decrypt_key = AesKey { 121 | rd_key: [0; RD_KEY_MAX_SIZE], 122 | rounds: 0, 123 | }; 124 | aes_set_decrypt_key(user_key, 192, &mut decrypt_key); 125 | 126 | Cipher { 127 | encrypt_key, 128 | decrypt_key, 129 | auto_padding: true, 130 | } 131 | } 132 | 133 | /// Create an AES 256-bit cipher with a given key. 134 | /// 135 | /// Once created, a cipher can encrypt or decrypt any times of data using the same key. 136 | /// `user_key` must be at length of 256-bits, i.e. 32 bytes. 137 | /// 138 | /// # Examples 139 | /// 140 | /// ``` 141 | /// use libaes::Cipher; 142 | /// 143 | /// let my_key = b"This is the key!This is the key!"; // 32 bytes 144 | /// let cipher = Cipher::new_256(my_key); 145 | /// ``` 146 | pub fn new_256(user_key: &[u8; AES_256_KEY_LEN]) -> Cipher { 147 | let mut encrypt_key = AesKey { 148 | rd_key: [0; RD_KEY_MAX_SIZE], 149 | rounds: 0, 150 | }; 151 | aes_set_encrypt_key(user_key, 256, &mut encrypt_key); 152 | 153 | let mut decrypt_key = AesKey { 154 | rd_key: [0; RD_KEY_MAX_SIZE], 155 | rounds: 0, 156 | }; 157 | aes_set_decrypt_key(user_key, 256, &mut decrypt_key); 158 | 159 | Cipher { 160 | encrypt_key, 161 | decrypt_key, 162 | auto_padding: true, 163 | } 164 | } 165 | 166 | /// Changes the `auto_padding` setting of the cipher. The default value is `true`. 167 | /// 168 | /// When setting it to `false`, the input data of CBC encryption must be multiple of `AES_BLOCK_SIZE`. 169 | /// 170 | /// And note that `auto_padding` is ignored in CFB mode. 171 | pub fn set_auto_padding(&mut self, auto_padding: bool) { 172 | self.auto_padding = auto_padding; 173 | } 174 | 175 | /// Returns the `auto_padding` setting in this cipher. If true, 176 | /// the padding is done in PKCS7. 177 | pub fn auto_padding(&self) -> bool { 178 | self.auto_padding 179 | } 180 | 181 | /// Encrypt in CBC mode. 182 | /// 183 | /// The input data is not modified. The output is a new Vec. Padding (PKCS7) is included. 184 | /// `iv` is a 16-byte slice. Panics if `iv` is less than 16 bytes. 185 | /// 186 | /// This method works for all key sizes. 187 | /// 188 | /// Note: auto padding is enabled by default. If the cipher disabled auto padding, this 189 | /// method will not add padding. If the input data length is not multiple of AES_BLOCK_SIZE, 190 | /// the output will be an empty Vec (i.e. error). 191 | /// 192 | /// # Examples 193 | /// 194 | /// ``` 195 | /// use libaes::Cipher; 196 | /// 197 | /// let my_key = b"This is the key!"; // key is 16 bytes 198 | /// let plaintext = b"A plaintext"; // less than 16 bytes, will be padded automatically 199 | /// let iv = b"This is 16 bytes"; 200 | /// let cipher = Cipher::new_128(my_key); 201 | /// let encrypted = cipher.cbc_encrypt(iv, plaintext); 202 | /// ``` 203 | pub fn cbc_encrypt(&self, iv: &[u8], data: &[u8]) -> Vec { 204 | let mut padded = if self.auto_padding { 205 | pad(data) 206 | } else if data.len() % AES_BLOCK_SIZE == 0 { 207 | data.to_vec() 208 | } else { 209 | return Vec::new(); 210 | }; 211 | 212 | let mut my_iv = iv; 213 | let mut rest = &mut padded[..]; 214 | while rest.len() >= AES_BLOCK_SIZE { 215 | let (block, remain) = rest.split_at_mut(AES_BLOCK_SIZE); 216 | xor_with_iv(block, my_iv); 217 | aes_encrypt(BlockBuf::InPlace(block), &self.encrypt_key); 218 | my_iv = block; 219 | rest = remain; 220 | } 221 | padded 222 | } 223 | 224 | /// Decrypt in CBC mode. 225 | /// 226 | /// The input data is not modified. The output is a new Vec. Padding is handled automatically. 227 | /// If decrypt encountered unexpected errors, the output is an empty Vec. If the cipher has 228 | /// the wrong key, the output will either be a wrong plaintext or an empty Vec. 229 | /// 230 | /// `iv` is a 16-byte slice. Panics if `iv` is less than 16 bytes. 231 | /// 232 | /// This method works for all key sizes. 233 | /// 234 | /// # Examples 235 | /// 236 | /// ``` 237 | /// use libaes::Cipher; 238 | /// 239 | /// let my_key = b"This is the key!"; 240 | /// let iv = b"This is 16 bytes"; 241 | /// let plaintext = b"This is plain text for AES"; 242 | /// let ciphertext = b"\xfe\x2e\xa4\x03\xd2\x65\xa9\xe6\x78\xee\x16\x35\xf3\xa6\xe6\xf4\ 243 | /// \xa3\x16\xb6\xd4\x35\x6d\x2b\x6f\x49\xff\x9e\x3c\xe4\x66\x16\xb9"; 244 | /// 245 | /// let cipher = Cipher::new_128(my_key); 246 | /// let decrypted = cipher.cbc_decrypt(iv, ciphertext); 247 | /// assert_eq!(plaintext, &decrypted[..]); 248 | /// ``` 249 | pub fn cbc_decrypt(&self, iv: &[u8], data: &[u8]) -> Vec { 250 | let length = data.len(); 251 | if (length % AES_BLOCK_SIZE) != 0 { 252 | return Vec::new(); // data is invalid. 253 | } 254 | let mut new = data.to_vec(); 255 | let mut my_iv = iv; 256 | 257 | for i in (0..length).step_by(AES_BLOCK_SIZE) { 258 | let block = &mut new[i..i + AES_BLOCK_SIZE]; 259 | aes_decrypt(block, &self.decrypt_key); 260 | xor_with_iv(block, my_iv); 261 | my_iv = &data[i..i + AES_BLOCK_SIZE]; 262 | } 263 | if self.auto_padding { 264 | unpad(&mut new); 265 | } 266 | new 267 | } 268 | 269 | /// Encrypt in CFB128 mode (i.e. CFB mode with 128-bit segment size). 270 | /// 271 | /// The input `data` is not modified. The output is a new Vec. No padding. 272 | /// `iv` is a 16-byte slice. Panics if `iv` is less than 16 bytes. 273 | /// 274 | /// # Examples 275 | /// 276 | /// ``` 277 | /// use libaes::Cipher; 278 | /// 279 | /// let my_key = b"This is the key!"; // key is 16 bytes, i.e. 128-bit 280 | /// let plaintext = b"A plaintext"; // less than 16 bytes, will be padded automatically 281 | /// let iv = b"This is 16 bytes"; 282 | /// let cipher = Cipher::new_128(my_key); 283 | /// let encrypted = cipher.cfb128_encrypt(iv, plaintext); 284 | /// ``` 285 | pub fn cfb128_encrypt(&self, iv: &[u8], data: &[u8]) -> Vec { 286 | let mut new = data.to_vec(); 287 | let mut rest = &mut new[..]; 288 | let mut my_iv = iv; 289 | let mut i = 0; 290 | 291 | while rest.len() >= AES_BLOCK_SIZE { 292 | let (block, remain) = rest.split_at_mut(AES_BLOCK_SIZE); 293 | aes_encrypt(BlockBuf::FromTo((my_iv, block)), &self.encrypt_key); 294 | let plain_text = &data[i..i + AES_BLOCK_SIZE]; 295 | xor_with_iv(block, plain_text); 296 | my_iv = block; 297 | rest = remain; 298 | i += AES_BLOCK_SIZE; 299 | } 300 | 301 | if !rest.is_empty() { 302 | // rest.len() < AES_BLOCK_SIZE 303 | let mut out_block = my_iv.to_vec(); 304 | aes_encrypt(BlockBuf::FromTo((my_iv, &mut out_block)), &self.encrypt_key); 305 | xor_with_iv(rest, &out_block); 306 | } 307 | 308 | new 309 | } 310 | 311 | /// Decrypt in CFB128 mode (i.e. CFB mode with 128-bit segment size). 312 | /// 313 | /// The input `data` is not modified. The output is a new Vec. No padding. 314 | /// `iv` is a 16-byte slice. Panics if `iv` is less than 16 bytes. 315 | /// 316 | /// # Examples 317 | /// 318 | /// ``` 319 | /// use libaes::Cipher; 320 | /// 321 | /// let my_key = b"This is the key!"; 322 | /// let iv = b"This is 16 bytes"; 323 | /// let plaintext = b"This is plain text for AES"; 324 | /// let ciphertext = b"\x16\x94\x9e\xe0\x7c\x4b\x7a\xc2\x83\xca\x96\x4f\xae\ 325 | /// \x6a\x35\xbc\x8e\xdb\x19\x0a\x4d\x8d\x19\x59\x0f\x2a"; 326 | /// 327 | /// let cipher = Cipher::new_128(my_key); 328 | /// let decrypted = cipher.cfb128_decrypt(iv, ciphertext); 329 | /// assert_eq!(plaintext, &decrypted[..]); 330 | /// ``` 331 | pub fn cfb128_decrypt(&self, iv: &[u8], data: &[u8]) -> Vec { 332 | let length = data.len(); 333 | let mut new = data.to_vec(); 334 | let mut my_iv = iv; 335 | let mut i = 0; 336 | 337 | while i + AES_BLOCK_SIZE <= length { 338 | let block = &mut new[i..i + AES_BLOCK_SIZE]; 339 | aes_encrypt(BlockBuf::FromTo((my_iv, block)), &self.encrypt_key); 340 | my_iv = &data[i..i + AES_BLOCK_SIZE]; 341 | xor_with_iv(block, my_iv); 342 | 343 | i += AES_BLOCK_SIZE; 344 | } 345 | 346 | if i < length { 347 | let remain = &mut new[i..length]; // remain.len() < AES_BLOCK_SIZE 348 | let mut out_block = my_iv.to_vec(); 349 | aes_encrypt(BlockBuf::FromTo((my_iv, &mut out_block)), &self.encrypt_key); 350 | xor_with_iv(remain, &out_block); 351 | } 352 | 353 | new 354 | } 355 | } 356 | 357 | // PKCS7 padding: a new Vec is returned with padding. 358 | fn pad(input: &[u8]) -> Vec { 359 | let sz = input.len(); 360 | let add = 16 - (sz % 16); 361 | let mut v: Vec = Vec::with_capacity(sz + add); 362 | v.extend_from_slice(input); 363 | for _ in 0..add { 364 | v.push(add as u8); 365 | } 366 | v 367 | } 368 | 369 | // PKCS7 un-padding in-place: the input Vec is truncated as needed if successful, 370 | // otherwise truncated to empty. 371 | fn unpad(padded: &mut Vec) { 372 | let sz = padded.len(); 373 | if sz < AES_BLOCK_SIZE { 374 | return; // Should be at least one block length. 375 | } 376 | let added = padded[sz - 1] as usize; 377 | let unpad_sz = if sz > added { sz - added } else { 0 }; 378 | padded.truncate(unpad_sz); 379 | } 380 | 381 | // bit-wise XOR `buf` slice with `iv` slice 382 | // `buf` length must be less or equal to `iv` length 383 | fn xor_with_iv(buf: &mut [u8], iv: &[u8]) { 384 | for i in 0..buf.len() { 385 | buf[i] ^= iv[i]; 386 | } 387 | } 388 | 389 | /*- 390 | TE0[x] = S [x].[02, 01, 01, 03]; 391 | TE1[x] = S [x].[03, 02, 01, 01]; 392 | TE2[x] = S [x].[01, 03, 02, 01]; 393 | TE3[x] = S [x].[01, 01, 03, 02]; 394 | 395 | TD0[x] = Si[x].[0e, 09, 0d, 0b]; 396 | TD1[x] = Si[x].[0b, 0e, 09, 0d]; 397 | TD2[x] = Si[x].[0d, 0b, 0e, 09]; 398 | TD3[x] = Si[x].[09, 0d, 0b, 0e]; 399 | TD4[x] = Si[x].[01]; 400 | */ 401 | 402 | const TE0: [u32; 256] = [ 403 | 0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 404 | 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 405 | 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 406 | 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 407 | 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 408 | 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 409 | 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 410 | 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 411 | 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 412 | 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 413 | 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 414 | 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 415 | 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 416 | 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 417 | 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 418 | 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 419 | 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 420 | 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 421 | 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 422 | 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 423 | 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 424 | 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 425 | 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 426 | 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 427 | 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 428 | 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 429 | 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 430 | 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 431 | 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 432 | 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 433 | 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 434 | 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a, 435 | ]; 436 | 437 | const TE1: [u32; 256] = [ 438 | 0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 439 | 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 440 | 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 441 | 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 442 | 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 443 | 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 444 | 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 445 | 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 446 | 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 447 | 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 448 | 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 449 | 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 450 | 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 451 | 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 452 | 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 453 | 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 454 | 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 455 | 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 456 | 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 457 | 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 458 | 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 459 | 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 460 | 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 461 | 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 462 | 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 463 | 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 464 | 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 465 | 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 466 | 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 467 | 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 468 | 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 469 | 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616, 470 | ]; 471 | 472 | const TE2: [u32; 256] = [ 473 | 0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 474 | 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 475 | 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 476 | 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 477 | 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 478 | 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 479 | 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 480 | 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 481 | 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 482 | 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 483 | 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 484 | 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 485 | 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 486 | 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 487 | 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 488 | 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 489 | 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 490 | 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 491 | 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 492 | 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 493 | 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 494 | 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 495 | 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 496 | 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 497 | 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 498 | 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 499 | 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 500 | 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 501 | 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 502 | 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 503 | 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 504 | 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16, 505 | ]; 506 | 507 | const TE3: [u32; 256] = [ 508 | 0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 509 | 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 510 | 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 511 | 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 512 | 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 513 | 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 514 | 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 515 | 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 516 | 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 517 | 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 518 | 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 519 | 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 520 | 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 521 | 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 522 | 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 523 | 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 524 | 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 525 | 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 526 | 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 527 | 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 528 | 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 529 | 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 530 | 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 531 | 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 532 | 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 533 | 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 534 | 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 535 | 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 536 | 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 537 | 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 538 | 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 539 | 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c, 540 | ]; 541 | 542 | const TD0: [u32; 256] = [ 543 | 0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 544 | 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 545 | 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 546 | 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 547 | 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 548 | 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 549 | 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 550 | 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 551 | 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 552 | 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 553 | 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 554 | 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 555 | 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 556 | 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 557 | 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 558 | 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 559 | 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 560 | 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 561 | 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 562 | 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 563 | 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 564 | 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 565 | 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 566 | 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 567 | 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 568 | 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 569 | 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 570 | 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 571 | 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 572 | 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 573 | 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 574 | 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742, 575 | ]; 576 | 577 | const TD1: [u32; 256] = [ 578 | 0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 579 | 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 580 | 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 581 | 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 582 | 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 583 | 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 584 | 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 585 | 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 586 | 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 587 | 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 588 | 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 589 | 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 590 | 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 591 | 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 592 | 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 593 | 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 594 | 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 595 | 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 596 | 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 597 | 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 598 | 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 599 | 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 600 | 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 601 | 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 602 | 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 603 | 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 604 | 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 605 | 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 606 | 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 607 | 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 608 | 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 609 | 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857, 610 | ]; 611 | 612 | const TD2: [u32; 256] = [ 613 | 0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 614 | 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 615 | 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 616 | 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 617 | 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 618 | 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 619 | 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 620 | 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 621 | 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 622 | 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 623 | 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 624 | 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 625 | 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 626 | 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 627 | 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 628 | 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 629 | 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 630 | 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 631 | 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 632 | 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 633 | 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 634 | 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 635 | 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 636 | 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 637 | 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 638 | 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 639 | 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 640 | 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 641 | 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 642 | 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 643 | 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 644 | 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8, 645 | ]; 646 | 647 | const TD3: [u32; 256] = [ 648 | 0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 649 | 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 650 | 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 651 | 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 652 | 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 653 | 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 654 | 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 655 | 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 656 | 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 657 | 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 658 | 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 659 | 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 660 | 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 661 | 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 662 | 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 663 | 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 664 | 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 665 | 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 666 | 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 667 | 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 668 | 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 669 | 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 670 | 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 671 | 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 672 | 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 673 | 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 674 | 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 675 | 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 676 | 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 677 | 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 678 | 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 679 | 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0, 680 | ]; 681 | 682 | const TD4: [u8; 256] = [ 683 | 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 684 | 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 685 | 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 686 | 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 687 | 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 688 | 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 689 | 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 690 | 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 691 | 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 692 | 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 693 | 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 694 | 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 695 | 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 696 | 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 697 | 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 698 | 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d, 699 | ]; 700 | 701 | const RCON: [u32; 10] = [ 702 | 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000, 703 | 0x1B000000, 704 | 0x36000000, // for 128-bit blocks, Rijndael never uses more than 10 RCON values 705 | ]; 706 | 707 | // `bytes` must have at least 4 bytes. 708 | fn get_u32(bytes: &[u8]) -> u32 { 709 | let u8_array: [u8; 4] = [bytes[0], bytes[1], bytes[2], bytes[3]]; 710 | u32::from_be_bytes(u8_array) 711 | } 712 | 713 | fn put_u32(bytes: &mut [u8], val: u32) { 714 | let u8_array: [u8; 4] = u32::to_be_bytes(val); 715 | bytes.copy_from_slice(&u8_array); 716 | } 717 | 718 | struct AesKey { 719 | pub rd_key: [u32; RD_KEY_MAX_SIZE], // big enough for any key length 720 | pub rounds: u8, 721 | } 722 | 723 | // Expand the cipher key into the encryption key schedule. 724 | fn aes_set_encrypt_key(user_key: &[u8], key_bits: u16, key: &mut AesKey) { 725 | key.rounds = match key_bits { 726 | 128 => 10, 727 | 192 => 12, 728 | 256 => 14, 729 | _ => panic!("wrong value for bits {}", key_bits), 730 | }; 731 | 732 | let mut rk = &mut key.rd_key[..]; 733 | rk[0] = get_u32(&user_key[0..4]); 734 | rk[1] = get_u32(&user_key[4..8]); 735 | rk[2] = get_u32(&user_key[8..12]); 736 | rk[3] = get_u32(&user_key[12..16]); 737 | 738 | if key_bits == 128 { 739 | let mut i = 0; 740 | loop { 741 | let temp: usize = rk[3] as usize; 742 | rk[4] = rk[0] 743 | ^ (TE2[(temp >> 16) & 0xff] & 0xff000000) 744 | ^ (TE3[(temp >> 8) & 0xff] & 0x00ff0000) 745 | ^ (TE0[(temp) & 0xff] & 0x0000ff00) 746 | ^ (TE1[temp >> 24] & 0x000000ff) 747 | ^ RCON[i]; 748 | rk[5] = rk[1] ^ rk[4]; 749 | rk[6] = rk[2] ^ rk[5]; 750 | rk[7] = rk[3] ^ rk[6]; 751 | 752 | i += 1; 753 | if i == 10 { 754 | return; 755 | } 756 | 757 | rk = &mut rk[4..]; 758 | } 759 | } 760 | 761 | rk[4] = get_u32(&user_key[16..20]); 762 | rk[5] = get_u32(&user_key[20..24]); 763 | 764 | if key_bits == 192 { 765 | let mut i = 0; 766 | loop { 767 | let temp: usize = rk[5] as usize; 768 | rk[6] = rk[0] 769 | ^ (TE2[(temp >> 16) & 0xff] & 0xff000000) 770 | ^ (TE3[(temp >> 8) & 0xff] & 0x00ff0000) 771 | ^ (TE0[(temp) & 0xff] & 0x0000ff00) 772 | ^ (TE1[temp >> 24] & 0x000000ff) 773 | ^ RCON[i]; 774 | rk[7] = rk[1] ^ rk[6]; 775 | rk[8] = rk[2] ^ rk[7]; 776 | rk[9] = rk[3] ^ rk[8]; 777 | 778 | i += 1; 779 | if i == 8 { 780 | return; 781 | } 782 | 783 | rk[10] = rk[4] ^ rk[9]; 784 | rk[11] = rk[5] ^ rk[10]; 785 | 786 | rk = &mut rk[6..]; 787 | } 788 | } 789 | 790 | rk[6] = get_u32(&user_key[24..28]); 791 | rk[7] = get_u32(&user_key[28..32]); 792 | 793 | if key_bits == 256 { 794 | let mut i = 0; 795 | loop { 796 | let temp: usize = rk[7] as usize; 797 | rk[8] = rk[0] 798 | ^ (TE2[(temp >> 16) & 0xff] & 0xff000000) 799 | ^ (TE3[(temp >> 8) & 0xff] & 0x00ff0000) 800 | ^ (TE0[(temp) & 0xff] & 0x0000ff00) 801 | ^ (TE1[temp >> 24] & 0x000000ff) 802 | ^ RCON[i]; 803 | rk[9] = rk[1] ^ rk[8]; 804 | rk[10] = rk[2] ^ rk[9]; 805 | rk[11] = rk[3] ^ rk[10]; 806 | 807 | i += 1; 808 | if i == 7 { 809 | return; 810 | } 811 | 812 | let temp: usize = rk[11] as usize; 813 | rk[12] = rk[4] 814 | ^ (TE2[temp >> 24] & 0xff000000) 815 | ^ (TE3[(temp >> 16) & 0xff] & 0x00ff0000) 816 | ^ (TE0[(temp >> 8) & 0xff] & 0x0000ff00) 817 | ^ (TE1[(temp) & 0xff] & 0x000000ff); 818 | rk[13] = rk[5] ^ rk[12]; 819 | rk[14] = rk[6] ^ rk[13]; 820 | rk[15] = rk[7] ^ rk[14]; 821 | 822 | rk = &mut rk[8..]; 823 | } 824 | } 825 | } 826 | 827 | // Expand the cipher key into the decryption key schedule. 828 | fn aes_set_decrypt_key(user_key: &[u8], key_bits: u16, key: &mut AesKey) { 829 | // first, start with an encryption schedule 830 | aes_set_encrypt_key(user_key, key_bits, key); 831 | 832 | let mut rk = &mut key.rd_key[..]; 833 | let mut temp: u32; 834 | 835 | // invert the order of the round keys 836 | let mut i: usize = 0; 837 | let mut j: usize = 4 * key.rounds as usize; 838 | while i < j { 839 | temp = rk[i]; 840 | rk[i] = rk[j]; 841 | rk[j] = temp; 842 | temp = rk[i + 1]; 843 | rk[i + 1] = rk[j + 1]; 844 | rk[j + 1] = temp; 845 | temp = rk[i + 2]; 846 | rk[i + 2] = rk[j + 2]; 847 | rk[j + 2] = temp; 848 | temp = rk[i + 3]; 849 | rk[i + 3] = rk[j + 3]; 850 | rk[j + 3] = temp; 851 | i += 4; 852 | j -= 4; 853 | } 854 | 855 | // apply the inverse MixColumn transform to all round keys but the first and the last 856 | for _ in 1..key.rounds { 857 | rk = &mut rk[4..]; 858 | rk[0] = TD0[TE1[(rk[0] >> 24) as usize] as usize & 0xff] 859 | ^ TD1[TE1[(rk[0] >> 16) as usize & 0xff] as usize & 0xff] 860 | ^ TD2[TE1[(rk[0] >> 8) as usize & 0xff] as usize & 0xff] 861 | ^ TD3[TE1[(rk[0]) as usize & 0xff] as usize & 0xff]; 862 | rk[1] = TD0[TE1[(rk[1] >> 24) as usize] as usize & 0xff] 863 | ^ TD1[TE1[(rk[1] >> 16) as usize & 0xff] as usize & 0xff] 864 | ^ TD2[TE1[(rk[1] >> 8) as usize & 0xff] as usize & 0xff] 865 | ^ TD3[TE1[(rk[1]) as usize & 0xff] as usize & 0xff]; 866 | rk[2] = TD0[TE1[(rk[2] >> 24) as usize] as usize & 0xff] 867 | ^ TD1[TE1[(rk[2] >> 16) as usize & 0xff] as usize & 0xff] 868 | ^ TD2[TE1[(rk[2] >> 8) as usize & 0xff] as usize & 0xff] 869 | ^ TD3[TE1[(rk[2]) as usize & 0xff] as usize & 0xff]; 870 | rk[3] = TD0[TE1[(rk[3] >> 24) as usize] as usize & 0xff] 871 | ^ TD1[TE1[(rk[3] >> 16) as usize & 0xff] as usize & 0xff] 872 | ^ TD2[TE1[(rk[3] >> 8) as usize & 0xff] as usize & 0xff] 873 | ^ TD3[TE1[(rk[3]) as usize & 0xff] as usize & 0xff]; 874 | } 875 | } 876 | 877 | /// Block buffer(s) to operate a single block crypto 878 | enum BlockBuf<'a> { 879 | InPlace(&'a mut [u8]), // Input and output are the same buffer 880 | FromTo((&'a [u8], &'a mut [u8])), // Input and output are separate buffers 881 | } 882 | 883 | /// Encrypt a single block 884 | /// 885 | /// Caller can provide `BlockBuf` to encrypt in-place or not. See `BlockBuf` definition. 886 | fn aes_encrypt(block_buf: BlockBuf, key: &AesKey) { 887 | let mut rk: &[u32] = &key.rd_key[..]; 888 | 889 | // map byte array block to cipher state 890 | // and add initial round key: 891 | let (mut s0, mut s1, mut s2, mut s3, output) = match block_buf { 892 | BlockBuf::InPlace(buf) => ( 893 | get_u32(&buf[0..4]) ^ rk[0], 894 | get_u32(&buf[4..8]) ^ rk[1], 895 | get_u32(&buf[8..12]) ^ rk[2], 896 | get_u32(&buf[12..16]) ^ rk[3], 897 | buf, 898 | ), 899 | BlockBuf::FromTo((in_buf, out_buf)) => ( 900 | get_u32(&in_buf[0..4]) ^ rk[0], 901 | get_u32(&in_buf[4..8]) ^ rk[1], 902 | get_u32(&in_buf[8..12]) ^ rk[2], 903 | get_u32(&in_buf[12..16]) ^ rk[3], 904 | out_buf, 905 | ), 906 | }; 907 | 908 | // Nr - 1 full rounds: 909 | let mut r = key.rounds >> 1; 910 | let mut t0: u32; 911 | let mut t1: u32; 912 | let mut t2: u32; 913 | let mut t3: u32; 914 | 915 | loop { 916 | t0 = TE0[(s0 >> 24) as usize] 917 | ^ TE1[(s1 >> 16) as usize & 0xff] 918 | ^ TE2[(s2 >> 8) as usize & 0xff] 919 | ^ TE3[(s3) as usize & 0xff] 920 | ^ rk[4]; 921 | t1 = TE0[(s1 >> 24) as usize] 922 | ^ TE1[(s2 >> 16) as usize & 0xff] 923 | ^ TE2[(s3 >> 8) as usize & 0xff] 924 | ^ TE3[(s0) as usize & 0xff] 925 | ^ rk[5]; 926 | t2 = TE0[(s2 >> 24) as usize] 927 | ^ TE1[(s3 >> 16) as usize & 0xff] 928 | ^ TE2[(s0 >> 8) as usize & 0xff] 929 | ^ TE3[(s1) as usize & 0xff] 930 | ^ rk[6]; 931 | t3 = TE0[(s3 >> 24) as usize] 932 | ^ TE1[(s0 >> 16) as usize & 0xff] 933 | ^ TE2[(s1 >> 8) as usize & 0xff] 934 | ^ TE3[(s2) as usize & 0xff] 935 | ^ rk[7]; 936 | 937 | rk = &rk[8..]; 938 | 939 | r -= 1; 940 | if r == 0 { 941 | break; 942 | } 943 | 944 | s0 = TE0[(t0 >> 24) as usize] 945 | ^ TE1[(t1 >> 16) as usize & 0xff] 946 | ^ TE2[(t2 >> 8) as usize & 0xff] 947 | ^ TE3[(t3) as usize & 0xff] 948 | ^ rk[0]; 949 | s1 = TE0[(t1 >> 24) as usize] 950 | ^ TE1[(t2 >> 16) as usize & 0xff] 951 | ^ TE2[(t3 >> 8) as usize & 0xff] 952 | ^ TE3[(t0) as usize & 0xff] 953 | ^ rk[1]; 954 | s2 = TE0[(t2 >> 24) as usize] 955 | ^ TE1[(t3 >> 16) as usize & 0xff] 956 | ^ TE2[(t0 >> 8) as usize & 0xff] 957 | ^ TE3[(t1) as usize & 0xff] 958 | ^ rk[2]; 959 | s3 = TE0[(t3 >> 24) as usize] 960 | ^ TE1[(t0 >> 16) as usize & 0xff] 961 | ^ TE2[(t1 >> 8) as usize & 0xff] 962 | ^ TE3[(t2) as usize & 0xff] 963 | ^ rk[3]; 964 | } 965 | 966 | // apply last round and 967 | // map cipher state to byte array block: 968 | let s0 = (TE2[(t0 >> 24) as usize] & 0xff000000) 969 | ^ (TE3[(t1 >> 16) as usize & 0xff] & 0x00ff0000) 970 | ^ (TE0[(t2 >> 8) as usize & 0xff] & 0x0000ff00) 971 | ^ (TE1[(t3) as usize & 0xff] & 0x000000ff) 972 | ^ rk[0]; 973 | put_u32(&mut output[0..4], s0); 974 | let s1 = (TE2[(t1 >> 24) as usize] & 0xff000000) 975 | ^ (TE3[(t2 >> 16) as usize & 0xff] & 0x00ff0000) 976 | ^ (TE0[(t3 >> 8) as usize & 0xff] & 0x0000ff00) 977 | ^ (TE1[(t0) as usize & 0xff] & 0x000000ff) 978 | ^ rk[1]; 979 | put_u32(&mut output[4..8], s1); 980 | let s2 = (TE2[(t2 >> 24) as usize] & 0xff000000) 981 | ^ (TE3[(t3 >> 16) as usize & 0xff] & 0x00ff0000) 982 | ^ (TE0[(t0 >> 8) as usize & 0xff] & 0x0000ff00) 983 | ^ (TE1[(t1) as usize & 0xff] & 0x000000ff) 984 | ^ rk[2]; 985 | put_u32(&mut output[8..12], s2); 986 | let s3 = (TE2[(t3 >> 24) as usize] & 0xff000000) 987 | ^ (TE3[(t0 >> 16) as usize & 0xff] & 0x00ff0000) 988 | ^ (TE0[(t1 >> 8) as usize & 0xff] & 0x0000ff00) 989 | ^ (TE1[(t2) as usize & 0xff] & 0x000000ff) 990 | ^ rk[3]; 991 | put_u32(&mut output[12..16], s3); 992 | } 993 | 994 | // Decrypt a single block in-place 995 | fn aes_decrypt(buf: &mut [u8], key: &AesKey) { 996 | let mut rk: &[u32] = &key.rd_key[..]; 997 | 998 | // map byte array block to cipher state 999 | // and add initial round key: 1000 | let mut s0 = get_u32(&buf[0..4]) ^ rk[0]; 1001 | let mut s1 = get_u32(&buf[4..8]) ^ rk[1]; 1002 | let mut s2 = get_u32(&buf[8..12]) ^ rk[2]; 1003 | let mut s3 = get_u32(&buf[12..16]) ^ rk[3]; 1004 | 1005 | // Nr - 1 full rounds: 1006 | let mut r = key.rounds >> 1; 1007 | let mut t0: u32; 1008 | let mut t1: u32; 1009 | let mut t2: u32; 1010 | let mut t3: u32; 1011 | 1012 | loop { 1013 | t0 = TD0[(s0 >> 24) as usize] 1014 | ^ TD1[(s3 >> 16) as usize & 0xff] 1015 | ^ TD2[(s2 >> 8) as usize & 0xff] 1016 | ^ TD3[(s1) as usize & 0xff] 1017 | ^ rk[4]; 1018 | t1 = TD0[(s1 >> 24) as usize] 1019 | ^ TD1[(s0 >> 16) as usize & 0xff] 1020 | ^ TD2[(s3 >> 8) as usize & 0xff] 1021 | ^ TD3[(s2) as usize & 0xff] 1022 | ^ rk[5]; 1023 | t2 = TD0[(s2 >> 24) as usize] 1024 | ^ TD1[(s1 >> 16) as usize & 0xff] 1025 | ^ TD2[(s0 >> 8) as usize & 0xff] 1026 | ^ TD3[(s3) as usize & 0xff] 1027 | ^ rk[6]; 1028 | t3 = TD0[(s3 >> 24) as usize] 1029 | ^ TD1[(s2 >> 16) as usize & 0xff] 1030 | ^ TD2[(s1 >> 8) as usize & 0xff] 1031 | ^ TD3[(s0) as usize & 0xff] 1032 | ^ rk[7]; 1033 | 1034 | rk = &rk[8..]; 1035 | 1036 | r -= 1; 1037 | if r == 0 { 1038 | break; 1039 | } 1040 | 1041 | s0 = TD0[(t0 >> 24) as usize] 1042 | ^ TD1[(t3 >> 16) as usize & 0xff] 1043 | ^ TD2[(t2 >> 8) as usize & 0xff] 1044 | ^ TD3[(t1) as usize & 0xff] 1045 | ^ rk[0]; 1046 | s1 = TD0[(t1 >> 24) as usize] 1047 | ^ TD1[(t0 >> 16) as usize & 0xff] 1048 | ^ TD2[(t3 >> 8) as usize & 0xff] 1049 | ^ TD3[(t2) as usize & 0xff] 1050 | ^ rk[1]; 1051 | s2 = TD0[(t2 >> 24) as usize] 1052 | ^ TD1[(t1 >> 16) as usize & 0xff] 1053 | ^ TD2[(t0 >> 8) as usize & 0xff] 1054 | ^ TD3[(t3) as usize & 0xff] 1055 | ^ rk[2]; 1056 | s3 = TD0[(t3 >> 24) as usize] 1057 | ^ TD1[(t2 >> 16) as usize & 0xff] 1058 | ^ TD2[(t1 >> 8) as usize & 0xff] 1059 | ^ TD3[(t0) as usize & 0xff] 1060 | ^ rk[3]; 1061 | } 1062 | 1063 | // apply last round and 1064 | // map cipher state to byte array block: 1065 | let u8_4: [u8; 4] = [ 1066 | TD4[(t0 >> 24) as usize], 1067 | TD4[(t3 >> 16) as usize & 0xff], 1068 | TD4[(t2 >> 8) as usize & 0xff], 1069 | TD4[(t1) as usize & 0xff], 1070 | ]; 1071 | let s0 = u32::from_be_bytes(u8_4) ^ rk[0]; 1072 | put_u32(&mut buf[0..4], s0); 1073 | 1074 | let u8_4: [u8; 4] = [ 1075 | TD4[(t1 >> 24) as usize], 1076 | TD4[(t0 >> 16) as usize & 0xff], 1077 | TD4[(t3 >> 8) as usize & 0xff], 1078 | TD4[(t2) as usize & 0xff], 1079 | ]; 1080 | let s1 = u32::from_be_bytes(u8_4) ^ rk[1]; 1081 | put_u32(&mut buf[4..8], s1); 1082 | 1083 | let u8_4: [u8; 4] = [ 1084 | TD4[(t2 >> 24) as usize], 1085 | TD4[(t1 >> 16) as usize & 0xff], 1086 | TD4[(t0 >> 8) as usize & 0xff], 1087 | TD4[(t3) as usize & 0xff], 1088 | ]; 1089 | let s2 = u32::from_be_bytes(u8_4) ^ rk[2]; 1090 | put_u32(&mut buf[8..12], s2); 1091 | 1092 | let u8_4: [u8; 4] = [ 1093 | TD4[(t3 >> 24) as usize], 1094 | TD4[(t2 >> 16) as usize & 0xff], 1095 | TD4[(t1 >> 8) as usize & 0xff], 1096 | TD4[(t0) as usize & 0xff], 1097 | ]; 1098 | let s3 = u32::from_be_bytes(u8_4) ^ rk[3]; 1099 | put_u32(&mut buf[12..16], s3); 1100 | } 1101 | --------------------------------------------------------------------------------