1 files changed, 184 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/RecipientIdentifier.ts b/third_party/js/PKI.js/src/RecipientIdentifier.ts
new file mode 100644
index 0000000000..21d99cf450
--- /dev/null
+++ b/third_party/js/PKI.js/src/RecipientIdentifier.ts
@@ -0,0 +1,184 @@
+import * as asn1js from "asn1js";
+import * as pvutils from "pvutils";
+import { EMPTY_STRING } from "./constants";
+import { AsnError } from "./errors";
+import { IssuerAndSerialNumber, IssuerAndSerialNumberJson } from "./IssuerAndSerialNumber";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const VARIANT = "variant";
+const VALUE = "value";
+const CLEAR_PROPS = [
+  "blockName"
+];
+
+export interface IRecipientIdentifier {
+  variant: number;
+  value: IssuerAndSerialNumber | asn1js.OctetString;
+}
+
+export interface RecipientIdentifierJson {
+  variant: number;
+  value?: IssuerAndSerialNumberJson | asn1js.OctetStringJson;
+}
+
+export type RecipientIdentifierParameters = PkiObjectParameters & Partial<IRecipientIdentifier>;
+
+export type RecipientIdentifierSchema = Schema.SchemaParameters;
+
+/**
+ * Represents the RecipientIdentifier structure described in [RFC5652](https://datatracker.ietf.org/doc/html/rfc5652)
+ */
+export class RecipientIdentifier extends PkiObject implements IRecipientIdentifier {
+
+  public static override CLASS_NAME = "RecipientIdentifier";
+
+  public variant!: number;
+  public value!: IssuerAndSerialNumber | asn1js.OctetString;
+
+  /**
+   * Initializes a new instance of the {@link RecipientIdentifier} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: RecipientIdentifierParameters = {}) {
+    super();
+
+    this.variant = pvutils.getParametersValue(parameters, VARIANT, RecipientIdentifier.defaultValues(VARIANT));
+    if (VALUE in parameters) {
+      this.value = pvutils.getParametersValue(parameters, VALUE, RecipientIdentifier.defaultValues(VALUE));
+    }
+
+    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 VARIANT): number;
+  public static override defaultValues(memberName: typeof VALUE): any;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case VARIANT:
+        return (-1);
+      case VALUE:
+        return {};
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * Compare values with default values for all class members
+   * @param memberName String name for a class member
+   * @param memberValue Value to compare with default value
+   */
+  public static compareWithDefault(memberName: string, memberValue: any): boolean {
+    switch (memberName) {
+      case VARIANT:
+        return (memberValue === (-1));
+      case VALUE:
+        return (Object.keys(memberValue).length === 0);
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * RecipientIdentifier ::= CHOICE {
+   *    issuerAndSerialNumber IssuerAndSerialNumber,
+   *    subjectKeyIdentifier [0] SubjectKeyIdentifier }
+   *
+   * SubjectKeyIdentifier ::= OCTET STRING
+   *```
+   */
+  public static override schema(parameters: RecipientIdentifierSchema = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Choice({
+      value: [
+        IssuerAndSerialNumber.schema({
+          names: {
+            blockName: (names.blockName || EMPTY_STRING)
+          }
+        }),
+        new asn1js.Primitive({
+          name: (names.blockName || EMPTY_STRING),
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          }
+        })
+      ]
+    }));
+  }
+
+  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,
+      RecipientIdentifier.schema({
+        names: {
+          blockName: "blockName"
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    if (asn1.result.blockName.idBlock.tagClass === 1) {
+      this.variant = 1;
+      this.value = new IssuerAndSerialNumber({ schema: asn1.result.blockName });
+    } else {
+      this.variant = 2;
+      this.value = new asn1js.OctetString({ valueHex: asn1.result.blockName.valueBlock.valueHex });
+    }
+  }
+
+  public toSchema(): asn1js.BaseBlock<any> {
+    // Construct and return new ASN.1 schema for this object
+    switch (this.variant) {
+      case 1:
+        if (!(this.value instanceof IssuerAndSerialNumber)) {
+          throw new Error("Incorrect type of RecipientIdentifier.value. It should be IssuerAndSerialNumber.");
+        }
+        return this.value.toSchema();
+      case 2:
+        if (!(this.value instanceof asn1js.OctetString)) {
+          throw new Error("Incorrect type of RecipientIdentifier.value. It should be ASN.1 OctetString.");
+        }
+        return new asn1js.Primitive({
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          },
+          valueHex: this.value.valueBlock.valueHexView
+        });
+      default:
+        return new asn1js.Any() as any;
+    }
+  }
+
+  public toJSON(): RecipientIdentifierJson {
+    const res: RecipientIdentifierJson = {
+      variant: this.variant
+    };
+
+    if ((this.variant === 1 || this.variant === 2) && this.value) {
+      res.value = this.value.toJSON();
+    }
+
+    return res;
+  }
+
+}
+