wtx 0.43.0

A collection of different transport implementations and related tools focused primarily on web technologies.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181

use crate::{
  crypto::{
    Aes128GcmAwsLcRs, Aes256GcmAwsLcRs, Chacha20Poly1305AwsLcRs, CryptoError,
    aead::{Aead, NONCE_LEN, TAG_LEN, generate_nonce, split_nonce_content, write_tag},
  },
  rng::CryptoRng,
};
use aws_lc_rs::aead::{
  AES_128_GCM, AES_256_GCM, Aad, CHACHA20_POLY1305, LessSafeKey, Nonce, UnboundKey,
};

impl Aead for Aes128GcmAwsLcRs {
  type Secret = [u8; 16];

  #[inline]
  fn decrypt_in_place<'encrypted>(
    associated_data: &[u8],
    encrypted_data: &'encrypted mut [u8],
    secret: &Self::Secret,
  ) -> crate::Result<&'encrypted mut [u8]> {
    local_decrypt(
      &AES_128_GCM,
      associated_data,
      encrypted_data,
      CryptoError::InvalidAes128GcmData,
      secret,
    )
  }

  #[inline]
  fn encrypt_parts<RNG>(
    associated_data: &[u8],
    nonce: [&mut u8; NONCE_LEN],
    plaintext: &mut [u8],
    rng: &mut RNG,
    secret: &Self::Secret,
    tag: [&mut u8; TAG_LEN],
  ) -> crate::Result<()>
  where
    RNG: CryptoRng,
  {
    local_encrypt_vectored_data(
      &AES_128_GCM,
      associated_data,
      CryptoError::InvalidAes128GcmData,
      nonce,
      plaintext,
      rng,
      secret,
      tag,
    )
  }
}

impl Aead for Aes256GcmAwsLcRs {
  type Secret = [u8; 32];

  #[inline]
  fn decrypt_in_place<'encrypted>(
    associated_data: &[u8],
    encrypted_data: &'encrypted mut [u8],
    secret: &Self::Secret,
  ) -> crate::Result<&'encrypted mut [u8]> {
    local_decrypt(
      &AES_256_GCM,
      associated_data,
      encrypted_data,
      CryptoError::InvalidAes256GcmData,
      secret,
    )
  }

  #[inline]
  fn encrypt_parts<RNG>(
    associated_data: &[u8],
    nonce: [&mut u8; NONCE_LEN],
    plaintext: &mut [u8],
    rng: &mut RNG,
    secret: &Self::Secret,
    tag: [&mut u8; TAG_LEN],
  ) -> crate::Result<()>
  where
    RNG: CryptoRng,
  {
    local_encrypt_vectored_data(
      &AES_256_GCM,
      associated_data,
      CryptoError::InvalidAes256GcmData,
      nonce,
      plaintext,
      rng,
      secret,
      tag,
    )
  }
}

impl Aead for Chacha20Poly1305AwsLcRs {
  type Secret = [u8; 32];

  #[inline]
  fn decrypt_in_place<'encrypted>(
    associated_data: &[u8],
    encrypted_data: &'encrypted mut [u8],
    secret: &Self::Secret,
  ) -> crate::Result<&'encrypted mut [u8]> {
    local_decrypt(
      &CHACHA20_POLY1305,
      associated_data,
      encrypted_data,
      CryptoError::InvalidChacha20Poly1305Data,
      secret,
    )
  }

  #[inline]
  fn encrypt_parts<RNG>(
    associated_data: &[u8],
    nonce: [&mut u8; NONCE_LEN],
    plaintext: &mut [u8],
    rng: &mut RNG,
    secret: &Self::Secret,
    tag: [&mut u8; TAG_LEN],
  ) -> crate::Result<()>
  where
    RNG: CryptoRng,
  {
    local_encrypt_vectored_data(
      &CHACHA20_POLY1305,
      associated_data,
      CryptoError::InvalidChacha20Poly1305Data,
      nonce,
      plaintext,
      rng,
      secret,
      tag,
    )
  }
}

#[inline]
fn local_decrypt<'encrypted, const S: usize>(
  algorithm: &'static aws_lc_rs::aead::Algorithm,
  associated_data: &[u8],
  encrypted_data: &'encrypted mut [u8],
  error: CryptoError,
  secret: &[u8; S],
) -> crate::Result<&'encrypted mut [u8]> {
  let (nonce, content) = split_nonce_content(encrypted_data, error)?;
  let bytes = LessSafeKey::new(UnboundKey::new(algorithm, secret).map_err(|_| error)?)
    .open_in_place(Nonce::assume_unique_for_key(nonce), Aad::from(associated_data), content)
    .map_err(|_| error)?;
  Ok(bytes)
}

#[inline]
fn local_encrypt_vectored_data<RNG, const S: usize>(
  algorithm: &'static aws_lc_rs::aead::Algorithm,
  associated_data: &[u8],
  error: CryptoError,
  nonce: [&mut u8; NONCE_LEN],
  plaintext: &mut [u8],
  rng: &mut RNG,
  secret: &[u8; S],
  tag: [&mut u8; TAG_LEN],
) -> crate::Result<()>
where
  RNG: CryptoRng,
{
  let local_tag = LessSafeKey::new(UnboundKey::new(algorithm, secret).map_err(|_| error)?)
    .seal_in_place_separate_tag(
      Nonce::assume_unique_for_key(generate_nonce(nonce, rng)),
      Aad::from(associated_data),
      plaintext,
    )
    .map_err(|_| error)?
    .as_ref()
    .try_into()?;
  write_tag(local_tag, tag);
  Ok(())
}