libafl 0.15.4

Slot your own fuzzers together and extend their features using Rust
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

//! Nautilus grammar mutator, see <https://github.com/nautilus-fuzz/nautilus>
use alloc::{
    borrow::Cow,
    string::{String, ToString},
};
use core::fmt::Debug;
use std::fs::create_dir_all;

use libafl_bolts::Named;
use serde::{Deserialize, Serialize};

use crate::{
    Error, HasMetadata,
    common::nautilus::grammartec::{chunkstore::ChunkStore, context::Context},
    corpus::{Corpus, Testcase},
    feedbacks::{Feedback, StateInitializer},
    generators::NautilusContext,
    inputs::NautilusInput,
    state::HasCorpus,
};

/// Metadata for Nautilus grammar mutator chunks
#[derive(Serialize, Deserialize)]
pub struct NautilusChunksMetadata {
    /// the chunk store
    pub cks: ChunkStore,
}

impl Debug for NautilusChunksMetadata {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        write!(
            f,
            "NautilusChunksMetadata {{ {} }}",
            serde_json::to_string_pretty(self).unwrap(),
        )
    }
}

libafl_bolts::impl_serdeany!(NautilusChunksMetadata);

impl NautilusChunksMetadata {
    /// Creates a new [`NautilusChunksMetadata`]
    #[must_use]
    pub fn new(work_dir: String) -> Self {
        create_dir_all(format!("{}/outputs/chunks", &work_dir))
            .expect("Could not create folder in workdir");
        Self {
            cks: ChunkStore::new(work_dir),
        }
    }
}

/// A nautilus feedback for grammar fuzzing
#[derive(Debug)]
pub struct NautilusFeedback<'a> {
    ctx: &'a Context,
}

impl<'a> NautilusFeedback<'a> {
    /// Create a new [`NautilusFeedback`]
    #[must_use]
    pub fn new(context: &'a NautilusContext) -> Self {
        Self { ctx: &context.ctx }
    }

    fn append_nautilus_metadata_to_state<S>(
        &mut self,
        state: &mut S,
        testcase: &mut Testcase<NautilusInput>,
    ) -> Result<(), Error>
    where
        S: HasCorpus<NautilusInput> + HasMetadata,
    {
        state.corpus().load_input_into(testcase)?;
        let input = testcase.input().as_ref().unwrap().clone();
        let meta = state
            .metadata_map_mut()
            .get_mut::<NautilusChunksMetadata>()
            .expect("NautilusChunksMetadata not in the state");
        meta.cks.add_tree(input.tree, self.ctx);

        Ok(())
    }
}

impl Named for NautilusFeedback<'_> {
    fn name(&self) -> &Cow<'static, str> {
        static NAME: Cow<'static, str> = Cow::Borrowed("NautilusFeedback");
        &NAME
    }
}

impl<S> StateInitializer<S> for NautilusFeedback<'_> {}

impl<EM, OT, S> Feedback<EM, NautilusInput, OT, S> for NautilusFeedback<'_>
where
    S: HasMetadata + HasCorpus<NautilusInput>,
{
    fn append_metadata(
        &mut self,
        state: &mut S,
        _manager: &mut EM,
        _observers: &OT,
        testcase: &mut Testcase<NautilusInput>,
    ) -> Result<(), Error> {
        self.append_nautilus_metadata_to_state(state, testcase)
    }

    #[cfg(feature = "track_hit_feedbacks")]
    fn last_result(&self) -> Result<bool, Error> {
        Ok(false)
    }
}

#[derive(Serialize, Deserialize, Clone, Debug)]
struct NautilusUnparseMetadata {
    unparsed: String,
}

libafl_bolts::impl_serdeany!(NautilusUnparseMetadata);

/// Add the unparsed input to the testcase metadata. Useful e.g. if you want to have the input be unparsed on any solution automatically.
///
/// Returns a constant `false` for `is_interesting`.
#[derive(Debug)]
pub struct NautilusUnparseToMetadataFeedback<'a> {
    context: &'a NautilusContext,
}

impl<'a> NautilusUnparseToMetadataFeedback<'a> {
    /// Create a new [`NautilusUnparseToMetadataFeedback`]
    #[must_use]
    pub fn new(context: &'a NautilusContext) -> Self {
        Self { context }
    }
}
impl<S> StateInitializer<S> for NautilusUnparseToMetadataFeedback<'_> {}

impl<EM, OT, S> Feedback<EM, NautilusInput, OT, S> for NautilusUnparseToMetadataFeedback<'_> {
    fn append_metadata(
        &mut self,
        _state: &mut S,
        _manager: &mut EM,
        _observers: &OT,
        testcase: &mut Testcase<NautilusInput>,
    ) -> Result<(), Error> {
        let input = testcase.input().as_ref().unwrap().clone();
        let mut unparse_target = vec![];
        input.unparse(self.context, &mut unparse_target);
        let unparsed = String::from_utf8_lossy(&unparse_target).to_string();
        testcase.metadata_or_insert_with(|| NautilusUnparseMetadata { unparsed });

        Ok(())
    }

    #[cfg(feature = "track_hit_feedbacks")]
    fn last_result(&self) -> Result<bool, Error> {
        Ok(false)
    }
}

impl Named for NautilusUnparseToMetadataFeedback<'_> {
    fn name(&self) -> &Cow<'static, str> {
        static NAME: Cow<'static, str> = Cow::Borrowed("NautilusUnparseToMetadataFeedback");
        &NAME
    }
}