1 files changed, 221 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/EncapsulatedContentInfo.ts b/third_party/js/PKI.js/src/EncapsulatedContentInfo.ts
new file mode 100644
index 0000000000..8424aecb0d
--- /dev/null
+++ b/third_party/js/PKI.js/src/EncapsulatedContentInfo.ts
@@ -0,0 +1,221 @@
+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 E_CONTENT_TYPE = "eContentType";
+const E_CONTENT = "eContent";
+const CLEAR_PROPS = [
+  E_CONTENT_TYPE,
+  E_CONTENT,
+];
+
+export interface IEncapsulatedContentInfo {
+  eContentType: string;
+  eContent?: asn1js.OctetString;
+}
+
+export interface EncapsulatedContentInfoJson {
+  eContentType: string;
+  eContent?: asn1js.OctetStringJson;
+}
+
+export type EncapsulatedContentInfoParameters = PkiObjectParameters & Partial<IEncapsulatedContentInfo>;
+
+export type EncapsulatedContentInfoSchema = Schema.SchemaParameters<{
+  eContentType?: string;
+  eContent?: string;
+}>;
+
+/**
+ * Represents the EncapsulatedContentInfo structure described in [RFC5652](https://datatracker.ietf.org/doc/html/rfc5652)
+ */
+export class EncapsulatedContentInfo extends PkiObject implements IEncapsulatedContentInfo {
+
+  public static override CLASS_NAME = "EncapsulatedContentInfo";
+
+  public eContentType!: string;
+  public eContent?: asn1js.OctetString;
+
+  /**
+   * Initializes a new instance of the {@link EncapsulatedContentInfo} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: EncapsulatedContentInfoParameters = {}) {
+    super();
+
+    this.eContentType = pvutils.getParametersValue(parameters, E_CONTENT_TYPE, EncapsulatedContentInfo.defaultValues(E_CONTENT_TYPE));
+    if (E_CONTENT in parameters) {
+      this.eContent = pvutils.getParametersValue(parameters, E_CONTENT, EncapsulatedContentInfo.defaultValues(E_CONTENT));
+      if ((this.eContent.idBlock.tagClass === 1) &&
+        (this.eContent.idBlock.tagNumber === 4)) {
+        //#region Divide OCTET STRING value down to small pieces
+        if (this.eContent.idBlock.isConstructed === false) {
+          const constrString = new asn1js.OctetString({
+            idBlock: { isConstructed: true },
+            isConstructed: true
+          });
+
+          let offset = 0;
+          const viewHex = this.eContent.valueBlock.valueHexView.slice().buffer;
+          let length = viewHex.byteLength;
+
+          while (length > 0) {
+            const pieceView = new Uint8Array(viewHex, offset, ((offset + 65536) > viewHex.byteLength) ? (viewHex.byteLength - offset) : 65536);
+            const _array = new ArrayBuffer(pieceView.length);
+            const _view = new Uint8Array(_array);
+
+            for (let i = 0; i < _view.length; i++) {
+              _view[i] = pieceView[i];
+            }
+
+            constrString.valueBlock.value.push(new asn1js.OctetString({ valueHex: _array }));
+
+            length -= pieceView.length;
+            offset += pieceView.length;
+          }
+
+          this.eContent = constrString;
+        }
+        //#endregion
+      }
+    }
+
+    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 E_CONTENT_TYPE): string;
+  public static override defaultValues(memberName: typeof E_CONTENT): asn1js.OctetString;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case E_CONTENT_TYPE:
+        return EMPTY_STRING;
+      case E_CONTENT:
+        return new asn1js.OctetString();
+      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 E_CONTENT_TYPE:
+        return (memberValue === EMPTY_STRING);
+      case E_CONTENT:
+        {
+          if ((memberValue.idBlock.tagClass === 1) && (memberValue.idBlock.tagNumber === 4))
+            return (memberValue.isEqual(EncapsulatedContentInfo.defaultValues(E_CONTENT)));
+
+          return false;
+        }
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * EncapsulatedContentInfo ::= SEQUENCE {
+   *    eContentType ContentType,
+   *    eContent [0] EXPLICIT OCTET STRING OPTIONAL } * Changed it to ANY, as in PKCS#7
+   *```
+   */
+  public static override schema(parameters: EncapsulatedContentInfoSchema = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Sequence({
+      name: (names.blockName || EMPTY_STRING),
+      value: [
+        new asn1js.ObjectIdentifier({ name: (names.eContentType || EMPTY_STRING) }),
+        new asn1js.Constructed({
+          optional: true,
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          },
+          value: [
+            new asn1js.Any({ name: (names.eContent || EMPTY_STRING) }) // In order to aling this with PKCS#7 and CMS as well
+          ]
+        })
+      ]
+    }));
+  }
+
+  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,
+      EncapsulatedContentInfo.schema({
+        names: {
+          eContentType: E_CONTENT_TYPE,
+          eContent: E_CONTENT
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    this.eContentType = asn1.result.eContentType.valueBlock.toString();
+    if (E_CONTENT in asn1.result)
+      this.eContent = asn1.result.eContent;
+  }
+
+  public toSchema(): asn1js.Sequence {
+    //#region Create array for output sequence
+    const outputArray = [];
+
+    outputArray.push(new asn1js.ObjectIdentifier({ value: this.eContentType }));
+    if (this.eContent) {
+      if (EncapsulatedContentInfo.compareWithDefault(E_CONTENT, this.eContent) === false) {
+        outputArray.push(new asn1js.Constructed({
+          optional: true,
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          },
+          value: [this.eContent]
+        }));
+      }
+    }
+    //#endregion
+
+    //#region Construct and return new ASN.1 schema for this object
+    return (new asn1js.Sequence({
+      value: outputArray
+    }));
+    //#endregion
+  }
+
+  public toJSON(): EncapsulatedContentInfoJson {
+    const res: EncapsulatedContentInfoJson = {
+      eContentType: this.eContentType
+    };
+
+    if (this.eContent && EncapsulatedContentInfo.compareWithDefault(E_CONTENT, this.eContent) === false) {
+      res.eContent = this.eContent.toJSON();
+    }
+
+    return res;
+  }
+
+}
+