dotscope 0.6.0

A high-performance, cross-platform framework for analyzing and reverse engineering .NET PE executables
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

use crate::{
    metadata::{
        tables::{CodedIndex, CodedIndexType, ConstantRaw, RowReadable, TableId, TableInfoRef},
        token::Token,
    },
    utils::{read_le_at, read_le_at_dyn},
    Result,
};

impl RowReadable for ConstantRaw {
    const TABLE_ID: TableId = TableId::Constant;

    fn row_read(data: &[u8], offset: &mut usize, rid: u32, sizes: &TableInfoRef) -> Result<Self> {
        let offset_org = *offset;

        let c_type = read_le_at::<u8>(data, offset)?;
        *offset += 1; // Padding

        Ok(ConstantRaw {
            rid,
            token: Token::new(0x0B00_0000 + rid),
            offset: offset_org,
            base: c_type,
            parent: CodedIndex::read(data, offset, sizes, CodedIndexType::HasConstant)?,
            value: read_le_at_dyn(data, offset, sizes.is_large_blob())?,
        })
    }
}

#[cfg(test)]
mod tests {
    use std::sync::Arc;

    use crate::metadata::tables::{MetadataTable, TableId, TableInfo};

    use super::*;

    #[test]
    fn crafted_short() {
        let data = vec![
            0x01, // type
            0x00, // padding
            0x02, 0x02, // parent
            0x03, 0x03, // value
        ];

        let sizes = Arc::new(TableInfo::new_test(
            &[(TableId::Property, 1)],
            false,
            false,
            false,
        ));
        let table = MetadataTable::<ConstantRaw>::new(&data, 1, sizes).unwrap();

        let eval = |row: ConstantRaw| {
            assert_eq!(row.rid, 1);
            assert_eq!(row.token.value(), 0x0B000001);
            assert_eq!(row.base, 0x01);
            assert_eq!(
                row.parent,
                CodedIndex::new(TableId::Property, 128, CodedIndexType::HasConstant)
            );
            assert_eq!(row.value, 0x303);
        };

        {
            for row in table.iter() {
                eval(row);
            }
        }

        {
            let row = table.get(1).unwrap();
            eval(row);
        }
    }

    #[test]
    fn crafted_long() {
        let data = vec![
            0x01, // type
            0x00, // padding
            0x02, 0x02, 0x02, 0x02, // parent
            0x03, 0x03, 0x03, 0x03, // value
        ];

        let sizes = Arc::new(TableInfo::new_test(
            &[(TableId::Property, u16::MAX as u32 + 3)],
            true,
            true,
            true,
        ));
        let table = MetadataTable::<ConstantRaw>::new(&data, u16::MAX as u32 + 3, sizes).unwrap();

        let eval = |row: ConstantRaw| {
            assert_eq!(row.rid, 1);
            assert_eq!(row.token.value(), 0x0B000001);
            assert_eq!(row.base, 0x1);
            assert_eq!(
                row.parent,
                CodedIndex::new(TableId::Property, 0x808080, CodedIndexType::HasConstant)
            );
            assert_eq!(row.value, 0x3030303);
        };

        {
            for row in table.iter() {
                eval(row);
            }
        }

        {
            let row = table.get(1).unwrap();
            eval(row);
        }
    }
}