1 files changed, 100 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/PkiObject.ts b/third_party/js/PKI.js/src/PkiObject.ts
new file mode 100644
index 0000000000..780d6fc328
--- /dev/null
+++ b/third_party/js/PKI.js/src/PkiObject.ts
@@ -0,0 +1,100 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+import * as asn1js from "asn1js";
+import * as pvtsutils from "pvtsutils";
+import { AsnError } from "./errors";
+import * as Schema from "./Schema";
+
+export interface PkiObjectParameters {
+  schema?: Schema.SchemaType;
+}
+
+interface PkiObjectConstructor<T extends PkiObject = PkiObject> {
+  new(params: PkiObjectParameters): T;
+  CLASS_NAME: string;
+}
+
+export abstract class PkiObject {
+
+  /**
+   * Name of the class
+   */
+  public static CLASS_NAME = "PkiObject";
+
+  /**
+   * Returns block name
+   * @returns Returns string block name
+   */
+  public static blockName(): string {
+    return this.CLASS_NAME;
+  }
+
+  /**
+   * Creates PKI object from the raw data
+   * @param raw ASN.1 encoded raw data
+   * @returns Initialized and filled current class object
+   */
+  public static fromBER<T extends PkiObject>(this: PkiObjectConstructor<T>, raw: BufferSource): T {
+    const asn1 = asn1js.fromBER(raw);
+    AsnError.assert(asn1, this.name);
+
+    try {
+      return new this({ schema: asn1.result });
+    } catch (e) {
+      throw new AsnError(`Cannot create '${this.CLASS_NAME}' from ASN.1 object`);
+    }
+  }
+
+  /**
+   * Returns default values for all class members
+   * @param memberName String name for a class member
+   * @returns Default value
+   */
+  public static defaultValues(memberName: string): any {
+    throw new Error(`Invalid member name for ${this.CLASS_NAME} class: ${memberName}`);
+  }
+
+  /**
+   * Returns value of pre-defined ASN.1 schema for current class
+   * @param parameters Input parameters for the schema
+   * @returns ASN.1 schema object
+   */
+  public static schema(parameters: Schema.SchemaParameters = {}): Schema.SchemaType {
+    throw new Error(`Method '${this.CLASS_NAME}.schema' should be overridden`);
+  }
+
+  public get className(): string {
+    return (this.constructor as unknown as { CLASS_NAME: string; }).CLASS_NAME;
+  }
+
+  /**
+   * Converts parsed ASN.1 object into current class
+   * @param schema ASN.1 schema
+   */
+  public abstract fromSchema(schema: Schema.SchemaType): void;
+
+  /**
+   * Converts current object to ASN.1 object and sets correct values
+   * @param encodeFlag If param equal to `false` then creates schema via decoding stored value. In other case creates schema via assembling from cached parts
+   * @returns ASN.1 object
+   */
+  public abstract toSchema(encodeFlag?: boolean): Schema.SchemaType;
+
+  /**
+   * Converts the class to JSON object
+   * @returns JSON object
+   */
+  public abstract toJSON(): any;
+
+  public toString(encoding: "hex" | "base64" | "base64url" = "hex"): string {
+    let schema: Schema.SchemaType;
+
+    try {
+      schema = this.toSchema();
+    } catch {
+      schema = this.toSchema(true);
+    }
+
+    return pvtsutils.Convert.ToString(schema.toBER(), encoding);
+  }
+
+}
+\ No newline at end of file