122 lines
4.6 KiB
Rust
122 lines
4.6 KiB
Rust
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![warn(clippy::pedantic)]
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#![cfg(not(feature = "disable-encryption"))]
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use neqo_crypto::{
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constants::{Cipher, TLS_AES_128_GCM_SHA256, TLS_VERSION_1_3},
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hkdf, Aead,
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};
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use test_fixture::fixture_init;
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const AAD: &[u8] = &[
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0xc1, 0xff, 0x00, 0x00, 0x12, 0x05, 0xf0, 0x67, 0xa5, 0x50, 0x2a, 0x42, 0x62, 0xb5, 0x00, 0x40,
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0x74, 0x00, 0x01,
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];
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const PLAINTEXT: &[u8] = &[
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0x0d, 0x00, 0x00, 0x00, 0x00, 0x18, 0x41, 0x0a, 0x02, 0x00, 0x00, 0x56, 0x03, 0x03, 0xee, 0xfc,
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0xe7, 0xf7, 0xb3, 0x7b, 0xa1, 0xd1, 0x63, 0x2e, 0x96, 0x67, 0x78, 0x25, 0xdd, 0xf7, 0x39, 0x88,
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0xcf, 0xc7, 0x98, 0x25, 0xdf, 0x56, 0x6d, 0xc5, 0x43, 0x0b, 0x9a, 0x04, 0x5a, 0x12, 0x00, 0x13,
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0x01, 0x00, 0x00, 0x2e, 0x00, 0x33, 0x00, 0x24, 0x00, 0x1d, 0x00, 0x20, 0x9d, 0x3c, 0x94, 0x0d,
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0x89, 0x69, 0x0b, 0x84, 0xd0, 0x8a, 0x60, 0x99, 0x3c, 0x14, 0x4e, 0xca, 0x68, 0x4d, 0x10, 0x81,
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0x28, 0x7c, 0x83, 0x4d, 0x53, 0x11, 0xbc, 0xf3, 0x2b, 0xb9, 0xda, 0x1a, 0x00, 0x2b, 0x00, 0x02,
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0x03, 0x04,
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];
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fn make_aead(cipher: Cipher) -> Aead {
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fixture_init();
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let secret = hkdf::import_key(
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TLS_VERSION_1_3,
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&[
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0x47, 0xb2, 0xea, 0xea, 0x6c, 0x26, 0x6e, 0x32, 0xc0, 0x69, 0x7a, 0x9e, 0x2a, 0x89,
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0x8b, 0xdf, 0x5c, 0x4f, 0xb3, 0xe5, 0xac, 0x34, 0xf0, 0xe5, 0x49, 0xbf, 0x2c, 0x58,
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0x58, 0x1a, 0x38, 0x11,
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],
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)
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.expect("make a secret");
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Aead::new(
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TLS_VERSION_1_3,
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cipher,
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&secret,
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"quic ", // QUICv1 label prefix; note the trailing space here.
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)
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.expect("can make an AEAD")
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}
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#[test]
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fn aead_encrypt_decrypt() {
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const TOGGLE: u8 = 77;
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let aead = make_aead(TLS_AES_128_GCM_SHA256);
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let ciphertext_buf = &mut [0; 1024]; // Can't use PLAINTEXT.len() here.
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let ciphertext = aead
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.encrypt(1, AAD, PLAINTEXT, ciphertext_buf)
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.expect("encrypt should work");
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let expected_ciphertext: &[u8] = &[
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0x5f, 0x01, 0xc4, 0xc2, 0xa2, 0x30, 0x3d, 0x29, 0x7e, 0x3c, 0x51, 0x9b, 0xf6, 0xb2, 0x23,
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0x86, 0xe3, 0xd0, 0xbd, 0x6d, 0xfc, 0x66, 0x12, 0x16, 0x77, 0x29, 0x80, 0x31, 0x04, 0x1b,
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0xb9, 0xa7, 0x9c, 0x9f, 0x0f, 0x9d, 0x4c, 0x58, 0x77, 0x27, 0x0a, 0x66, 0x0f, 0x5d, 0xa3,
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0x62, 0x07, 0xd9, 0x8b, 0x73, 0x83, 0x9b, 0x2f, 0xdf, 0x2e, 0xf8, 0xe7, 0xdf, 0x5a, 0x51,
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0xb1, 0x7b, 0x8c, 0x68, 0xd8, 0x64, 0xfd, 0x3e, 0x70, 0x8c, 0x6c, 0x1b, 0x71, 0xa9, 0x8a,
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0x33, 0x18, 0x15, 0x59, 0x9e, 0xf5, 0x01, 0x4e, 0xa3, 0x8c, 0x44, 0xbd, 0xfd, 0x38, 0x7c,
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0x03, 0xb5, 0x27, 0x5c, 0x35, 0xe0, 0x09, 0xb6, 0x23, 0x8f, 0x83, 0x14, 0x20, 0x04, 0x7c,
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0x72, 0x71, 0x28, 0x1c, 0xcb, 0x54, 0xdf, 0x78, 0x84,
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];
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assert_eq!(ciphertext, expected_ciphertext);
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let plaintext_buf = &mut [0; 1024]; // Can't use PLAINTEXT.len() here.
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let plaintext = aead
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.decrypt(1, AAD, ciphertext, plaintext_buf)
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.expect("decrypt should also work");
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assert_eq!(plaintext, PLAINTEXT);
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// Decryption failures...
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// Different counter.
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let res = aead.decrypt(2, AAD, ciphertext, plaintext_buf);
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assert!(res.is_err());
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// Front-truncate ciphertext.
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let res = aead.decrypt(1, AAD, &ciphertext[1..], plaintext_buf);
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assert!(res.is_err());
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// End-truncate ciphertext.
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let ciphertext_last = ciphertext.len() - 1;
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let res = aead.decrypt(1, AAD, &ciphertext[..ciphertext_last], plaintext_buf);
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assert!(res.is_err());
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// Mess with the buffer.
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let mut scratch = Vec::new();
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scratch.extend_from_slice(ciphertext);
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// Toggle first octet.
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scratch[0] ^= TOGGLE;
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let res = aead.decrypt(1, AAD, &scratch[..], plaintext_buf);
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assert!(res.is_err());
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// Toggle the auth tag.
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scratch[0] ^= TOGGLE;
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scratch[ciphertext_last] ^= TOGGLE;
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let res = aead.decrypt(1, AAD, &scratch[..], plaintext_buf);
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assert!(res.is_err());
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// Mess with the AAD.
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scratch.clear();
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scratch.extend_from_slice(AAD);
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// Front-truncate.
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let res = aead.decrypt(1, &scratch[1..], ciphertext, plaintext_buf);
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assert!(res.is_err());
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// End-truncate.
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let aad_last = AAD.len() - 1;
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let res = aead.decrypt(1, &scratch[..aad_last], ciphertext, plaintext_buf);
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assert!(res.is_err());
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scratch[0] ^= TOGGLE;
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let res = aead.decrypt(1, &scratch[..], ciphertext, plaintext_buf);
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assert!(res.is_err());
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}
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