1 files changed, 194 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/SignedAndUnsignedAttributes.ts b/third_party/js/PKI.js/src/SignedAndUnsignedAttributes.ts
new file mode 100644
index 0000000000..de87e034a1
--- /dev/null
+++ b/third_party/js/PKI.js/src/SignedAndUnsignedAttributes.ts
@@ -0,0 +1,194 @@
+import * as asn1js from "asn1js";
+import * as pvtsutils from "pvtsutils";
+import * as pvutils from "pvutils";
+import { Attribute, AttributeJson } from "./Attribute";
+import { EMPTY_BUFFER, EMPTY_STRING } from "./constants";
+import { AsnError } from "./errors";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const TYPE = "type";
+const ATTRIBUTES = "attributes";
+const ENCODED_VALUE = "encodedValue";
+const CLEAR_PROPS = [
+  ATTRIBUTES
+];
+
+export interface ISignedAndUnsignedAttributes {
+  type: number;
+  attributes: Attribute[];
+  /**
+   * Need to have it in order to successfully process with signature verification
+   */
+  encodedValue: ArrayBuffer;
+}
+
+export interface SignedAndUnsignedAttributesJson {
+  type: number;
+  attributes: AttributeJson[];
+}
+
+export type SignedAndUnsignedAttributesParameters = PkiObjectParameters & Partial<ISignedAndUnsignedAttributes>;
+
+export type SignedAndUnsignedAttributesSchema = Schema.SchemaParameters<{
+  tagNumber?: number;
+  attributes?: string;
+}>;
+
+/**
+ * Represents the SignedAndUnsignedAttributes structure described in [RFC5652](https://datatracker.ietf.org/doc/html/rfc5652)
+ */
+export class SignedAndUnsignedAttributes extends PkiObject implements ISignedAndUnsignedAttributes {
+
+  public static override CLASS_NAME = "SignedAndUnsignedAttributes";
+
+  public type!: number;
+  public attributes!: Attribute[];
+  public encodedValue!: ArrayBuffer;
+
+  /**
+   * Initializes a new instance of the {@link SignedAndUnsignedAttributes} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: SignedAndUnsignedAttributesParameters = {}) {
+    super();
+
+    this.type = pvutils.getParametersValue(parameters, TYPE, SignedAndUnsignedAttributes.defaultValues(TYPE));
+    this.attributes = pvutils.getParametersValue(parameters, ATTRIBUTES, SignedAndUnsignedAttributes.defaultValues(ATTRIBUTES));
+    this.encodedValue = pvutils.getParametersValue(parameters, ENCODED_VALUE, SignedAndUnsignedAttributes.defaultValues(ENCODED_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 TYPE): number;
+  public static override defaultValues(memberName: typeof ATTRIBUTES): Attribute[];
+  public static override defaultValues(memberName: typeof ENCODED_VALUE): ArrayBuffer;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case TYPE:
+        return (-1);
+      case ATTRIBUTES:
+        return [];
+      case ENCODED_VALUE:
+        return EMPTY_BUFFER;
+      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 TYPE:
+        return (memberValue === SignedAndUnsignedAttributes.defaultValues(TYPE));
+      case ATTRIBUTES:
+        return (memberValue.length === 0);
+      case ENCODED_VALUE:
+        return (memberValue.byteLength === 0);
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * SignedAttributes ::= SET SIZE (1..MAX) OF Attribute
+   *
+   * UnsignedAttributes ::= SET SIZE (1..MAX) OF Attribute
+   *```
+   */
+  public static override schema(parameters: SignedAndUnsignedAttributesSchema = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Constructed({
+      name: (names.blockName || EMPTY_STRING),
+      optional: true,
+      idBlock: {
+        tagClass: 3, // CONTEXT-SPECIFIC
+        tagNumber: names.tagNumber || 0 // "SignedAttributes" = 0, "UnsignedAttributes" = 1
+      },
+      value: [
+        new asn1js.Repeated({
+          name: (names.attributes || EMPTY_STRING),
+          value: Attribute.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,
+      SignedAndUnsignedAttributes.schema({
+        names: {
+          tagNumber: this.type,
+          attributes: ATTRIBUTES
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    this.type = asn1.result.idBlock.tagNumber;
+    this.encodedValue = pvtsutils.BufferSourceConverter.toArrayBuffer(asn1.result.valueBeforeDecodeView);
+
+    //#region Change type from "[0]" to "SET" accordingly to standard
+    const encodedView = new Uint8Array(this.encodedValue);
+    encodedView[0] = 0x31;
+    //#endregion
+
+    if ((ATTRIBUTES in asn1.result) === false) {
+      if (this.type === 0)
+        throw new Error("Wrong structure of SignedUnsignedAttributes");
+      else
+        return; // Not so important in case of "UnsignedAttributes"
+    }
+
+    this.attributes = Array.from(asn1.result.attributes, element => new Attribute({ schema: element }));
+    //#endregion
+  }
+
+  public toSchema(): asn1js.Sequence {
+    if (SignedAndUnsignedAttributes.compareWithDefault(TYPE, this.type) || SignedAndUnsignedAttributes.compareWithDefault(ATTRIBUTES, this.attributes))
+      throw new Error("Incorrectly initialized \"SignedAndUnsignedAttributes\" class");
+
+    //#region Construct and return new ASN.1 schema for this object
+    return (new asn1js.Constructed({
+      optional: true,
+      idBlock: {
+        tagClass: 3, // CONTEXT-SPECIFIC
+        tagNumber: this.type // "SignedAttributes" = 0, "UnsignedAttributes" = 1
+      },
+      value: Array.from(this.attributes, o => o.toSchema())
+    }));
+    //#endregion
+  }
+
+  public toJSON(): SignedAndUnsignedAttributesJson {
+    if (SignedAndUnsignedAttributes.compareWithDefault(TYPE, this.type) || SignedAndUnsignedAttributes.compareWithDefault(ATTRIBUTES, this.attributes))
+      throw new Error("Incorrectly initialized \"SignedAndUnsignedAttributes\" class");
+
+    return {
+      type: this.type,
+      attributes: Array.from(this.attributes, o => o.toJSON())
+    };
+  }
+
+}