1 files changed, 121 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/AltName.ts b/third_party/js/PKI.js/src/AltName.ts
new file mode 100644
index 0000000000..a7a4b72331
--- /dev/null
+++ b/third_party/js/PKI.js/src/AltName.ts
@@ -0,0 +1,121 @@
+import * as asn1js from "asn1js";
+import * as pvutils from "pvutils";
+import { EMPTY_STRING } from "./constants";
+import { AsnError } from "./errors";
+import { GeneralName, GeneralNameJson } from "./GeneralName";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const ALT_NAMES = "altNames";
+const CLEAR_PROPS = [
+  ALT_NAMES
+];
+
+export interface IAltName {
+  /**
+   * Array of alternative names in GeneralName type
+   */
+  altNames: GeneralName[];
+}
+
+export type AltNameParameters = PkiObjectParameters & Partial<IAltName>;
+
+export interface AltNameJson {
+  altNames: GeneralNameJson[];
+}
+
+/**
+ * Represents the AltName structure described in [RFC5280](https://datatracker.ietf.org/doc/html/rfc5280)
+ */
+export class AltName extends PkiObject implements IAltName {
+
+  public static override CLASS_NAME = "AltName";
+
+  public altNames!: GeneralName[];
+
+  /**
+   * Initializes a new instance of the {@link AltName} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: AltNameParameters = {}) {
+    super();
+
+    this.altNames = pvutils.getParametersValue(parameters, ALT_NAMES, AltName.defaultValues(ALT_NAMES));
+
+    if (parameters.schema) {
+      this.fromSchema(parameters.schema);
+    }
+  }
+
+  /**
+   * Returns default values for all class members
+   * @param memberName String name for a class member
+   * @returns Default value
+   */
+  public static override defaultValues(memberName: typeof ALT_NAMES): GeneralName[];
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case ALT_NAMES:
+        return [];
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * AltName ::= GeneralNames
+   *```
+   */
+  public static override schema(parameters: Schema.SchemaParameters<{ altNames?: string; }> = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Sequence({
+      name: (names.blockName || EMPTY_STRING),
+      value: [
+        new asn1js.Repeated({
+          name: (names.altNames || EMPTY_STRING),
+          value: GeneralName.schema()
+        })
+      ]
+    }));
+  }
+
+  public fromSchema(schema: Schema.SchemaType): void {
+    // Clear input data first
+    pvutils.clearProps(schema, CLEAR_PROPS);
+
+    // Check the schema is valid
+    const asn1 = asn1js.compareSchema(schema,
+      schema,
+      AltName.schema({
+        names: {
+          altNames: ALT_NAMES
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    if (ALT_NAMES in asn1.result) {
+      this.altNames = Array.from(asn1.result.altNames, element => new GeneralName({ schema: element }));
+    }
+  }
+
+  public toSchema(): asn1js.Sequence {
+    //#region Construct and return new ASN.1 schema for this object
+    return (new asn1js.Sequence({
+      value: Array.from(this.altNames, o => o.toSchema())
+    }));
+    //#endregion
+  }
+
+  public toJSON(): AltNameJson {
+    return {
+      altNames: Array.from(this.altNames, o => o.toJSON())
+    };
+  }
+
+}