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

use std::fmt;

use crate::key;
use crate::msgs::codec;
use crate::msgs::codec::{Codec, Reader};

/// An externally length'd payload
#[derive(Clone, Eq, PartialEq)]
pub struct Payload(pub Vec<u8>);

impl Codec for Payload {
    fn encode(&self, bytes: &mut Vec<u8>) {
        bytes.extend_from_slice(&self.0);
    }

    fn read(r: &mut Reader) -> Option<Self> {
        Some(Self::read(r))
    }
}

impl Payload {
    pub fn new(bytes: impl Into<Vec<u8>>) -> Self {
        Self(bytes.into())
    }

    pub fn empty() -> Self {
        Self::new(Vec::new())
    }

    pub fn read(r: &mut Reader) -> Self {
        Self(r.rest().to_vec())
    }
}

impl Codec for key::Certificate {
    fn encode(&self, bytes: &mut Vec<u8>) {
        codec::u24(self.0.len() as u32).encode(bytes);
        bytes.extend_from_slice(&self.0);
    }

    fn read(r: &mut Reader) -> Option<Self> {
        let len = codec::u24::read(r)?.0 as usize;
        let mut sub = r.sub(len)?;
        let body = sub.rest().to_vec();
        Some(Self(body))
    }
}

impl fmt::Debug for Payload {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        hex(f, &self.0)
    }
}

/// An arbitrary, unknown-content, u24-length-prefixed payload
#[derive(Clone, Eq, PartialEq)]
pub struct PayloadU24(pub Vec<u8>);

impl PayloadU24 {
    pub fn new(bytes: Vec<u8>) -> Self {
        Self(bytes)
    }
}

impl Codec for PayloadU24 {
    fn encode(&self, bytes: &mut Vec<u8>) {
        codec::u24(self.0.len() as u32).encode(bytes);
        bytes.extend_from_slice(&self.0);
    }

    fn read(r: &mut Reader) -> Option<Self> {
        let len = codec::u24::read(r)?.0 as usize;
        let mut sub = r.sub(len)?;
        let body = sub.rest().to_vec();
        Some(Self(body))
    }
}

impl fmt::Debug for PayloadU24 {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        hex(f, &self.0)
    }
}

/// An arbitrary, unknown-content, u16-length-prefixed payload
#[derive(Clone, Eq, PartialEq)]
pub struct PayloadU16(pub Vec<u8>);

impl PayloadU16 {
    pub fn new(bytes: Vec<u8>) -> Self {
        Self(bytes)
    }

    pub fn empty() -> Self {
        Self::new(Vec::new())
    }

    pub fn encode_slice(slice: &[u8], bytes: &mut Vec<u8>) {
        (slice.len() as u16).encode(bytes);
        bytes.extend_from_slice(slice);
    }
}

impl Codec for PayloadU16 {
    fn encode(&self, bytes: &mut Vec<u8>) {
        Self::encode_slice(&self.0, bytes);
    }

    fn read(r: &mut Reader) -> Option<Self> {
        let len = u16::read(r)? as usize;
        let mut sub = r.sub(len)?;
        let body = sub.rest().to_vec();
        Some(Self(body))
    }
}

impl fmt::Debug for PayloadU16 {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        hex(f, &self.0)
    }
}

/// An arbitrary, unknown-content, u8-length-prefixed payload
#[derive(Clone, Eq, PartialEq)]
pub struct PayloadU8(pub Vec<u8>);

impl PayloadU8 {
    pub fn new(bytes: Vec<u8>) -> Self {
        Self(bytes)
    }

    pub fn empty() -> Self {
        Self(Vec::new())
    }

    pub fn into_inner(self) -> Vec<u8> {
        self.0
    }
}

impl Codec for PayloadU8 {
    fn encode(&self, bytes: &mut Vec<u8>) {
        (self.0.len() as u8).encode(bytes);
        bytes.extend_from_slice(&self.0);
    }

    fn read(r: &mut Reader) -> Option<Self> {
        let len = u8::read(r)? as usize;
        let mut sub = r.sub(len)?;
        let body = sub.rest().to_vec();
        Some(Self(body))
    }
}

impl fmt::Debug for PayloadU8 {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        hex(f, &self.0)
    }
}

// Format an iterator of u8 into a hex string
pub(super) fn hex<'a>(
    f: &mut fmt::Formatter<'_>,
    payload: impl IntoIterator<Item = &'a u8>,
) -> fmt::Result {
    for b in payload {
        write!(f, "{:02x}", b)?
    }
    Ok(())
}