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
use crate::extractors::trx::extract_trx_partitions;
use crate::signatures::common::{SignatureError, SignatureResult, CONFIDENCE_HIGH};
use crate::structures::trx::parse_trx_header;
/// Human readable description
pub const DESCRIPTION: &str = "TRX firmware image";
/// TRX magic bytes
pub fn trx_magic() -> Vec<Vec<u8>> {
vec![b"HDR0".to_vec()]
}
/// Validates a TRX signature
pub fn trx_parser(file_data: &[u8], offset: usize) -> Result<SignatureResult, SignatureError> {
// Success return value
let mut result = SignatureResult {
offset,
description: DESCRIPTION.to_string(),
confidence: CONFIDENCE_HIGH,
..Default::default()
};
// Do a dry run to validate the TRX data
let dry_run = extract_trx_partitions(file_data, offset, None);
if dry_run.success {
if let Some(trx_total_size) = dry_run.size {
// Dry run successful, parse the TRX header and return a useful description
if let Ok(trx_header) = parse_trx_header(&file_data[offset..]) {
result.size = trx_total_size;
result.description = format!("{}, version {}, partition count: {}, header size: {} bytes, total size: {} bytes", result.description,
trx_header.version,
trx_header.partitions.len(),
trx_header.header_size,
result.size);
return Ok(result);
}
}
}
Err(SignatureError)
}