1 files changed, 209 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/AlgorithmIdentifier.ts b/third_party/js/PKI.js/src/AlgorithmIdentifier.ts
new file mode 100644
index 0000000000..ce9ecdffb5
--- /dev/null
+++ b/third_party/js/PKI.js/src/AlgorithmIdentifier.ts
@@ -0,0 +1,209 @@
+import * as asn1js from "asn1js";
+import * as pvutils from "pvutils";
+import { EMPTY_STRING } from "./constants";
+import { AsnError } from "./errors";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const ALGORITHM_ID = "algorithmId";
+const ALGORITHM_PARAMS = "algorithmParams";
+const ALGORITHM = "algorithm";
+const PARAMS = "params";
+const CLEAR_PROPS = [
+  ALGORITHM,
+  PARAMS
+];
+
+export interface IAlgorithmIdentifier {
+  /**
+   * ObjectIdentifier for algorithm (string representation)
+   */
+  algorithmId: string;
+  /**
+   * Any algorithm parameters
+   */
+  algorithmParams?: any;
+}
+
+export type AlgorithmIdentifierParameters = PkiObjectParameters & Partial<IAlgorithmIdentifier>;
+
+/**
+ * JSON representation of {@link AlgorithmIdentifier}
+ */
+export interface AlgorithmIdentifierJson {
+  algorithmId: string;
+  algorithmParams?: any;
+}
+
+export type AlgorithmIdentifierSchema = Schema.SchemaParameters<{
+  algorithmIdentifier?: string;
+  algorithmParams?: string;
+}>;
+
+/**
+ * Represents the AlgorithmIdentifier structure described in [RFC5280](https://datatracker.ietf.org/doc/html/rfc5280)
+ */
+export class AlgorithmIdentifier extends PkiObject implements IAlgorithmIdentifier {
+
+  public static override CLASS_NAME = "AlgorithmIdentifier";
+
+  public algorithmId!: string;
+  public algorithmParams?: any;
+
+  /**
+   * Initializes a new instance of the {@link AlgorithmIdentifier} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: AlgorithmIdentifierParameters = {}) {
+    super();
+
+    this.algorithmId = pvutils.getParametersValue(parameters, ALGORITHM_ID, AlgorithmIdentifier.defaultValues(ALGORITHM_ID));
+    if (ALGORITHM_PARAMS in parameters) {
+      this.algorithmParams = pvutils.getParametersValue(parameters, ALGORITHM_PARAMS, AlgorithmIdentifier.defaultValues(ALGORITHM_PARAMS));
+    }
+
+    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 ALGORITHM_ID): string;
+  public static override defaultValues(memberName: typeof ALGORITHM_PARAMS): any;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case ALGORITHM_ID:
+        return EMPTY_STRING;
+      case ALGORITHM_PARAMS:
+        return new asn1js.Any();
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * Compares values with default values for all class members
+   * @param memberName String name for a class member
+   * @param memberValue Value to compare with default value
+   */
+  static compareWithDefault(memberName: string, memberValue: any): boolean {
+    switch (memberName) {
+      case ALGORITHM_ID:
+        return (memberValue === EMPTY_STRING);
+      case ALGORITHM_PARAMS:
+        return (memberValue instanceof asn1js.Any);
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * AlgorithmIdentifier ::= Sequence  {
+   *    algorithm               OBJECT IDENTIFIER,
+   *    parameters              ANY DEFINED BY algorithm OPTIONAL  }
+   *```
+   */
+  public static override schema(parameters: AlgorithmIdentifierSchema = {}): any {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Sequence({
+      name: (names.blockName || EMPTY_STRING),
+      optional: (names.optional || false),
+      value: [
+        new asn1js.ObjectIdentifier({ name: (names.algorithmIdentifier || EMPTY_STRING) }),
+        new asn1js.Any({ name: (names.algorithmParams || EMPTY_STRING), optional: true })
+      ]
+    }));
+  }
+
+  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,
+      AlgorithmIdentifier.schema({
+        names: {
+          algorithmIdentifier: ALGORITHM,
+          algorithmParams: PARAMS
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    this.algorithmId = asn1.result.algorithm.valueBlock.toString();
+    if (PARAMS in asn1.result) {
+      this.algorithmParams = asn1.result.params;
+    }
+  }
+
+  public toSchema(): asn1js.Sequence {
+    // Create array for output sequence
+    const outputArray = [];
+    outputArray.push(new asn1js.ObjectIdentifier({ value: this.algorithmId }));
+    if (this.algorithmParams && !(this.algorithmParams instanceof asn1js.Any)) {
+      outputArray.push(this.algorithmParams);
+    }
+
+    // Construct and return new ASN.1 schema for this object
+    return (new asn1js.Sequence({
+      value: outputArray
+    }));
+  }
+
+  public toJSON(): AlgorithmIdentifierJson {
+    const object: AlgorithmIdentifierJson = {
+      algorithmId: this.algorithmId
+    };
+
+    if (this.algorithmParams && !(this.algorithmParams instanceof asn1js.Any)) {
+      object.algorithmParams = this.algorithmParams.toJSON();
+    }
+
+    return object;
+  }
+
+  /**
+   * Checks that two "AlgorithmIdentifiers" are equal
+   * @param algorithmIdentifier
+   */
+  public isEqual(algorithmIdentifier: unknown): boolean {
+    //#region Check input type
+    if (!(algorithmIdentifier instanceof AlgorithmIdentifier)) {
+      return false;
+    }
+    //#endregion
+
+    //#region Check "algorithm_id"
+    if (this.algorithmId !== algorithmIdentifier.algorithmId) {
+      return false;
+    }
+    //#endregion
+
+    //#region Check "algorithm_params"
+    if (this.algorithmParams) {
+      if (algorithmIdentifier.algorithmParams) {
+        return JSON.stringify(this.algorithmParams) === JSON.stringify(algorithmIdentifier.algorithmParams);
+      }
+
+      return false;
+    }
+
+    if (algorithmIdentifier.algorithmParams) {
+      return false;
+    }
+    //#endregion
+
+    return true;
+  }
+
+}