1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/errors/AsnError.ts b/third_party/js/PKI.js/src/errors/AsnError.ts
new file mode 100644
index 0000000000..60f159695b
--- /dev/null
+++ b/third_party/js/PKI.js/src/errors/AsnError.ts
@@ -0,0 +1,31 @@
+export interface AsnFromBerResult {
+  offset: number;
+  result: any;
+}
+
+export interface AsnCompareSchemaResult {
+  verified: boolean;
+  result?: any;
+}
+
+export class AsnError extends Error {
+
+  static assertSchema(asn1: AsnCompareSchemaResult, target: string): asserts asn1 is { verified: true, result: any; } {
+    if (!asn1.verified) {
+      throw new Error(`Object's schema was not verified against input data for ${target}`);
+    }
+  }
+
+  public static assert(asn: AsnFromBerResult, target: string): void {
+    if (asn.offset === -1) {
+      throw new AsnError(`Error during parsing of ASN.1 data. Data is not correct for '${target}'.`);
+    }
+  }
+
+  constructor(message: string) {
+    super(message);
+
+    this.name = "AsnError";
+  }
+
+}
+\ No newline at end of file