Updated ISO extractor to support more ISO sub-types

Author: devttys0

src/extractors.rs

@@ -158,6 +158,7 @@ pub mod gif;
 pub mod gpg;
 pub mod gzip;
 pub mod inflate;
+pub mod iso9660;
 pub mod jboot;
 pub mod jffs2;
 pub mod jpeg;

src/extractors/iso9660.rs

@@ -0,0 +1,32 @@
+use crate::extractors;
+use crate::extractors::sevenzip::sevenzip_extractor;
+
+/// Describes how to run the 7z utility to extract ISO images
+///
+/// ```
+/// use std::io::ErrorKind;
+/// use std::process::Command;
+/// use binwalk::extractors::common::ExtractorType;
+/// use binwalk::extractors::iso9660::iso9660_extractor;
+///
+/// match iso9660_extractor().utility {
+///     ExtractorType::None => panic!("Invalid extractor type of None"),
+///     ExtractorType::Internal(func) => println!("Internal extractor OK: {:?}", func),
+///     ExtractorType::External(cmd) => {
+///         if let Err(e) = Command::new(&cmd).output() {
+///             if e.kind() == ErrorKind::NotFound {
+///                 panic!("External extractor '{}' not found", cmd);
+///             } else {
+///                 panic!("Failed to execute external extractor '{}': {}", cmd, e);
+///             }
+///         }
+///     }
+/// }
+/// ```
+pub fn iso9660_extractor() -> extractors::common::Extractor {
+    // Same as the normal 7z extractor, but give the carved file an ISO file extension.
+    // The file extension matters, and 7z doesn't handle some ISO sub-formats correctly if the file extension is not '.iso'.
+    let mut extractor = sevenzip_extractor();
+    extractor.extension = "iso".to_string();
+    extractor
+}

src/magic.rs

@@ -168,7 +168,7 @@ pub fn patterns() -> Vec<signatures::common::Signature> {
             magic: signatures::iso9660::iso_magic(),
             parser: signatures::iso9660::iso_parser,
             description: signatures::iso9660::DESCRIPTION.to_string(),
-            extractor: Some(extractors::tsk::tsk_extractor()),
+            extractor: Some(extractors::iso9660::iso9660_extractor()),
         },
         // linux kernel
         signatures::common::Signature {