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authentication and start of connection

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This commit is contained in:
nora 2024-08-11 18:14:04 +02:00
parent faf2010051
commit 2b2e2ac1f0
6 changed files with 232 additions and 17 deletions
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14
ssh-transport/src/keys.rs
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@ -1,4 +1,4 @@
use chacha20::cipher::{KeyInit, KeyIvInit, StreamCipher, StreamCipherSeek};
use chacha20::cipher::{KeyInit, StreamCipher, StreamCipherSeek};
use sha2::Digest;
use subtle::ConstantTimeEq;
@ -154,7 +154,10 @@ impl SshChaCha20Poly1305 {
fn decrypt_len(&self, bytes: &mut [u8], packet_number: u64) {
// <https://github.com/openssh/openssh-portable/blob/1ec0a64c5dc57b8a2053a93b5ef0d02ff8598e5c/PROTOCOL.chacha20poly1305>
let mut cipher = SshChaCha20::new(&self.header_key, &packet_number.to_be_bytes().into());
let mut cipher = <SshChaCha20 as chacha20::cipher::KeyIvInit>::new(
&self.header_key,
&packet_number.to_be_bytes().into(),
);
cipher.apply_keystream(bytes);
}
@ -208,9 +211,10 @@ impl SshChaCha20Poly1305 {
main_cipher.apply_keystream(&mut poly1305_key);
// As the first act of encryption, encrypt the length.
// THIS PART IS CORRECT!!!
let mut len_cipher =
SshChaCha20::new(&self.header_key, &packet_number.to_be_bytes().into());
let mut len_cipher = <SshChaCha20 as chacha20::cipher::KeyIvInit>::new(
&self.header_key,
&packet_number.to_be_bytes().into(),
);
len_cipher.apply_keystream(&mut bytes[..4]);
// Advance ChaCha's block counter to 1