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

use crate::{
    constants::*,
    rules::RuleMessage,
    traits::{Emitable, ParseableParametrized},
    AuditBuffer, DecodeError, NetlinkDeserializable, NetlinkHeader, NetlinkPayload,
    NetlinkSerializable, StatusMessage,
};

#[derive(Debug, PartialEq, Eq, Clone)]
pub enum AuditMessage {
    GetStatus(Option<StatusMessage>),
    SetStatus(StatusMessage),
    AddRule(RuleMessage),
    DelRule(RuleMessage),
    ListRules(Option<RuleMessage>),
    /// Event message (message types 1300 through 1399). This includes the following message types
    /// (this list is non-exhaustive, and not really kept up to date): `AUDIT_SYSCALL`,
    /// `AUDIT_PATH`, `AUDIT_IPC`, `AUDIT_SOCKETCALL`, `AUDIT_CONFIG_CHANGE`, `AUDIT_SOCKADDR`,
    /// `AUDIT_CWD`, `AUDIT_EXECVE`, `AUDIT_IPC_SET_PERM`, `AUDIT_MQ_OPEN`, `AUDIT_MQ_SENDRECV`,
    /// `AUDIT_MQ_NOTIFY`, `AUDIT_MQ_GETSETATTR`, `AUDIT_KERNEL_OTHER`, `AUDIT_FD_PAIR`,
    /// `AUDIT_OBJ_PID`, `AUDIT_TTY`, `AUDIT_EOE`, `AUDIT_BPRM_FCAPS`, `AUDIT_CAPSET`,
    /// `AUDIT_MMAP`, `AUDIT_NETFILTER_PKT`, `AUDIT_NETFILTER_CFG`, `AUDIT_SECCOMP`,
    /// `AUDIT_PROCTITLE`, `AUDIT_FEATURE_CHANGE`, `AUDIT_REPLACE`, `AUDIT_KERN_MODULE`,
    /// `AUDIT_FANOTIFY`.
    ///
    /// The first element of the tuple is the message type, and the second is the event data.
    Event((u16, String)),
}

impl AuditMessage {
    pub fn is_event(&self) -> bool {
        if let AuditMessage::Event(_) = *self {
            true
        } else {
            false
        }
    }

    pub fn is_get_status(&self) -> bool {
        if let AuditMessage::GetStatus(_) = *self {
            true
        } else {
            false
        }
    }

    pub fn is_set_status(&self) -> bool {
        if let AuditMessage::GetStatus(_) = *self {
            true
        } else {
            false
        }
    }

    pub fn is_add_rule(&self) -> bool {
        if let AuditMessage::AddRule(_) = *self {
            true
        } else {
            false
        }
    }

    pub fn is_del_rule(&self) -> bool {
        if let AuditMessage::DelRule(_) = *self {
            true
        } else {
            false
        }
    }

    pub fn is_list_rules(&self) -> bool {
        if let AuditMessage::ListRules(_) = *self {
            true
        } else {
            false
        }
    }

    pub fn message_type(&self) -> u16 {
        use self::AuditMessage::*;

        match self {
            GetStatus(_) => AUDIT_GET,
            SetStatus(_) => AUDIT_SET,
            ListRules(_) => AUDIT_LIST_RULES,
            AddRule(_) => AUDIT_ADD_RULE,
            DelRule(_) => AUDIT_DEL_RULE,
            Event((message_type, _)) => *message_type,
        }
    }
}

impl Emitable for AuditMessage {
    fn buffer_len(&self) -> usize {
        use self::AuditMessage::*;

        match self {
            GetStatus(Some(ref msg)) => msg.buffer_len(),
            SetStatus(ref msg) => msg.buffer_len(),
            AddRule(ref msg) => msg.buffer_len(),
            DelRule(ref msg) => msg.buffer_len(),
            ListRules(Some(ref msg)) => msg.buffer_len(),
            GetStatus(None) | ListRules(None) => 0,
            Event((_, ref data)) => data.len(),
        }
    }

    fn emit(&self, buffer: &mut [u8]) {
        use self::AuditMessage::*;

        match self {
            GetStatus(Some(ref msg)) => msg.emit(buffer),
            SetStatus(ref msg) => msg.emit(buffer),
            AddRule(ref msg) => msg.emit(buffer),
            DelRule(ref msg) => msg.emit(buffer),
            ListRules(Some(ref msg)) => msg.emit(buffer),
            ListRules(None) | GetStatus(None) => {}
            Event((_, ref data)) => buffer.copy_from_slice(data.as_bytes()),
        }
    }
}

impl NetlinkSerializable<AuditMessage> for AuditMessage {
    fn message_type(&self) -> u16 {
        self.message_type()
    }

    fn buffer_len(&self) -> usize {
        <Self as Emitable>::buffer_len(self)
    }

    fn serialize(&self, buffer: &mut [u8]) {
        self.emit(buffer)
    }
}

impl NetlinkDeserializable<AuditMessage> for AuditMessage {
    type Error = DecodeError;
    fn deserialize(header: &NetlinkHeader, payload: &[u8]) -> Result<Self, Self::Error> {
        match AuditBuffer::new_checked(payload) {
            Err(e) => Err(e),
            Ok(buffer) => match AuditMessage::parse_with_param(&buffer, header.message_type) {
                Err(e) => Err(e),
                Ok(message) => Ok(message),
            },
        }
    }
}

impl From<AuditMessage> for NetlinkPayload<AuditMessage> {
    fn from(message: AuditMessage) -> Self {
        NetlinkPayload::InnerMessage(message)
    }
}