Merge pull request #71 from twostack/bip32_update

Hardened path verification / validation
twostack · Sep 20, 2023 · ce929b1 · ce929b1
2 parents 2021973 + f34ce07
commit ce929b1
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/lib/dartsv.dart b/lib/dartsv.dart
@@ -49,5 +49,6 @@ export 'src/encoding/utils.dart';
 export 'src/encoding/base58check.dart';
 export 'src/crypto/ecies.dart';
 export 'src/crypto/hdutils.dart';
+export 'src/crypto/childnumber.dart';
 
 
diff --git a/lib/src/crypto/hdutils.dart b/lib/src/crypto/hdutils.dart
@@ -68,7 +68,11 @@ class HDUtils {
     static List<ChildNumber> parsePath(String path) {
 
         if (!(path.startsWith("m") || path.startsWith("M")))
-            throw new InvalidPathException("Valid paths start with an 'm' or an 'M'");
+            throw InvalidPathException("Valid paths start with an 'm' or an 'M'");
+
+        final regex = RegExp(r"^([mM]\/)?(\d+'?\/)*\d+'?$");
+        if (!regex.hasMatch(path)) throw InvalidPathException("Invalid path expression");
+
 
         path = path.toUpperCase();
         path = path.replaceAll("'", "H");