ace-uds 0.2.1

UDS typed message layer implementing ISO 14229-1.
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

use crate::{UdsError, ValidationError};
use ace_core::{DiagError, FrameWrite};
use ace_macros::{FrameCodec, FrameRead, FrameWrite};

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub enum SecurityAccessRequest<'a> {
    RequestSeed(RequestSeed<'a>),
    SendKey(SendKey<'a>),
    IsoSaeReserved(u8),
    IsoSaeReservedRequestSeed(RequestSeed<'a>),
    IsoSaeReservedSendKey(SendKey<'a>),
    PyroTechnicSecurityRequestSeed(RequestSeed<'a>),
    PyroTechnicSecuritySendKey(SendKey<'a>),
    SystemSupplierSpecificRequestSeed(RequestSeed<'a>),
    SystemSupplierSpecificSendKey(SendKey<'a>),
}

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, FrameRead, FrameWrite)]
#[frame(error = UdsError)]
pub struct RequestSeed<'a> {
    pub request_seed: u8,
    pub security_access_data_record: &'a [u8],
}

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, FrameRead, FrameWrite)]
#[frame(error = UdsError)]
pub struct SendKey<'a> {
    pub send_key: u8,
    pub security_key: &'a [u8],
}

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub enum SecurityAccessResponse<'a> {
    KeyResponse(u8),
    SeedResponse(SeedResponse<'a>),
}

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, FrameCodec)]
#[frame(error = UdsError)]
pub struct SeedResponse<'a> {
    pub security_access_type: u8,
    pub security_seed: &'a [u8],
}

impl<'a> ace_core::codec::FrameRead<'a> for SecurityAccessResponse<'a> {
    type Error = UdsError;

    fn decode(buf: &mut &'a [u8]) -> Result<Self, Self::Error> {
        let access_type = *buf
            .first()
            .ok_or(UdsError::from(DiagError::LengthMismatch {
                expected: 1,
                actual: 0,
            }))?;

        if access_type % 2 == 1 {
            Ok(Self::SeedResponse(SeedResponse::decode(buf)?))
        } else {
            Ok(Self::KeyResponse(access_type))
        }
    }
}

impl<'a> ace_core::codec::FrameRead<'a> for SecurityAccessRequest<'a> {
    type Error = UdsError;

    fn decode(buf: &mut &'a [u8]) -> Result<Self, Self::Error> {
        let access_type = *buf
            .first()
            .ok_or(UdsError::from(DiagError::LengthMismatch {
                expected: 1,
                actual: 0,
            }))?;

        match access_type {
            0x00 | 0x7F => Ok(Self::IsoSaeReserved(access_type)),
            0x43..=0x5E if access_type % 2 == 1 => {
                Ok(Self::IsoSaeReservedRequestSeed(RequestSeed::decode(buf)?))
            }
            0x43..=0x5E if access_type % 2 == 0 => {
                Ok(Self::IsoSaeReservedSendKey(SendKey::decode(buf)?))
            }
            0x01..=0x41 if access_type % 2 == 1 => Ok(Self::RequestSeed(RequestSeed::decode(buf)?)),
            0x02..=0x42 if access_type % 2 == 0 => Ok(Self::SendKey(SendKey::decode(buf)?)),
            0x5F => Ok(Self::PyroTechnicSecurityRequestSeed(RequestSeed::decode(
                buf,
            )?)),
            0x60 => Ok(Self::PyroTechnicSecuritySendKey(SendKey::decode(buf)?)),
            0x61..=0x7E if access_type % 2 == 1 => Ok(Self::SystemSupplierSpecificRequestSeed(
                RequestSeed::decode(buf)?,
            )),
            0x61..=0x7E if access_type % 2 == 0 => {
                Ok(Self::SystemSupplierSpecificSendKey(SendKey::decode(buf)?))
            }
            _ => Err(UdsError::Validation(
                ValidationError::InvalidSecurityAccessType(access_type),
            )),
        }
    }
}

impl FrameWrite for SecurityAccessResponse<'_> {
    type Error = UdsError;

    fn encode<W: ace_core::codec::Writer>(&self, buf: &mut W) -> Result<(), Self::Error> {
        match self {
            Self::SeedResponse(inner) => Ok(inner.encode(buf)?),
            Self::KeyResponse(inner) => Ok(inner.encode(buf)?),
        }
    }
}

impl FrameWrite for SecurityAccessRequest<'_> {
    type Error = UdsError;

    fn encode<W: ace_core::codec::Writer>(&self, buf: &mut W) -> Result<(), Self::Error> {
        match self {
            Self::RequestSeed(inner)
            | Self::PyroTechnicSecurityRequestSeed(inner)
            | Self::SystemSupplierSpecificRequestSeed(inner)
            | Self::IsoSaeReservedRequestSeed(inner) => inner.encode(buf),
            Self::SendKey(inner)
            | Self::SystemSupplierSpecificSendKey(inner)
            | Self::PyroTechnicSecuritySendKey(inner)
            | Self::IsoSaeReservedSendKey(inner) => inner.encode(buf),
            Self::IsoSaeReserved(inner) => Ok(inner.encode(buf)?),
        }
    }
}