initial

src/formats/mod.rs

@@ -0,0 +1 @@
+pub mod mstar;

src/formats/mstar.rs

@@ -0,0 +1,81 @@
+use std::fs::{File};
+use crate::common;
+
+pub fn is_mstar_file(file: &File) -> bool {
+    let header = common::read_file(&file, 0, 32768).expect("REASON");
+    let header_string = String::from_utf8_lossy(&header);
+
+    if header_string.contains("filepartload") & header_string.contains("MstarUpgrade") | header_string.contains("CtvUpgrade") {
+        true
+    } else {
+        false
+    }
+}
+
+pub fn extract_mstar(file: &File) {
+    println!("extract mstar file");
+
+    let mut script = common::read_file(&file, 0, 32768).expect("REASON");
+
+    if let Some(pos) = script.iter().position(|x| [0x00, 0xFF].contains(x)) {
+        script.truncate(pos);
+    }
+
+    let script_string = String::from_utf8_lossy(&script);
+    //println!("{}", script_string);
+
+    let lines: Vec<&str> = script_string.lines().map(|l| l.trim()).collect();
+    let mut i = 0;
+
+    while i < lines.len() {
+        let line = lines[i];
+
+        if line.starts_with("filepartload") {
+            let parts: Vec<&str> = line.split_whitespace().collect();
+
+            if parts.len() >= 5 {
+                let offset = parts[3];
+                let size = parts[4];
+
+                //try to get partname from comment
+                let mut partname = if let Some(idx) = line.find('#') {
+                    line[idx + 1..].trim()
+                } else {
+                    "unknown"
+                };
+
+                let mut compression = "none";
+                let mut j = i + 1;
+                while j < lines.len() && !lines[j].starts_with("filepartload") {
+                    //get compression method
+                    if lines[j].contains("mscompress7") {
+                        compression = "lzma";
+                    } else if lines[j].contains("lz4") {
+                        compression = "lz4";
+                    }
+
+                    // try to get partname from nand/mmc/ubi writes
+                    if lines[j].starts_with("mmc write") | lines[j].starts_with("nand write") | lines[j].starts_with("ubi write"){
+                        let parts: Vec<&str> = lines[j].split_whitespace().collect();
+                        if partname == "unknown" {
+                            partname = parts[3]
+                        }
+                    }
+
+                    // check if its boot partition
+                    if lines[j].starts_with("mmc write.boot") {
+                        if partname == "unknown" {
+                            partname = "boot"
+                        }
+                    }
+                    j += 1;
+                }
+
+                println!("offset: {} size: {} --> {} (compression: {})", offset, size, partname, compression);
+            }
+        }
+
+        i += 1;
+    }
+
+}