1 files changed, 171 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/ContentInfo.ts b/third_party/js/PKI.js/src/ContentInfo.ts
new file mode 100644
index 0000000000..020e424345
--- /dev/null
+++ b/third_party/js/PKI.js/src/ContentInfo.ts
@@ -0,0 +1,171 @@
+import * as asn1js from "asn1js";
+import * as pvutils from "pvutils";
+import { EMPTY_STRING } from "./constants";
+import { AsnError } from "./errors";
+import { id_ContentType_Data, id_ContentType_EncryptedData, id_ContentType_EnvelopedData, id_ContentType_SignedData } from "./ObjectIdentifiers";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const CONTENT_TYPE = "contentType";
+const CONTENT = "content";
+const CLEAR_PROPS = [CONTENT_TYPE, CONTENT];
+
+export interface IContentInfo {
+  contentType: string;
+  content: any;
+}
+
+export type ContentInfoParameters = PkiObjectParameters & Partial<IContentInfo>;
+
+export type ContentInfoSchema = Schema.SchemaParameters<{
+  contentType?: string;
+  content?: string;
+}>;
+
+export interface ContentInfoJson {
+  contentType: string;
+  content?: any;
+}
+
+/**
+ * Represents the ContentInfo structure described in [RFC5652](https://datatracker.ietf.org/doc/html/rfc5652)
+ */
+export class ContentInfo extends PkiObject implements IContentInfo {
+
+  public static override CLASS_NAME = "ContentInfo";
+  public static readonly DATA = id_ContentType_Data;
+  public static readonly SIGNED_DATA = id_ContentType_SignedData;
+  public static readonly ENVELOPED_DATA = id_ContentType_EnvelopedData;
+  public static readonly ENCRYPTED_DATA = id_ContentType_EncryptedData;
+
+  public contentType!: string;
+  public content: any;
+
+  /**
+   * Initializes a new instance of the {@link ContentInfo} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: ContentInfoParameters = {}) {
+    super();
+
+    this.contentType = pvutils.getParametersValue(parameters, CONTENT_TYPE, ContentInfo.defaultValues(CONTENT_TYPE));
+    this.content = pvutils.getParametersValue(parameters, CONTENT, ContentInfo.defaultValues(CONTENT));
+
+    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 CONTENT_TYPE): string;
+  public static override defaultValues(memberName: typeof CONTENT): any;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case CONTENT_TYPE:
+        return EMPTY_STRING;
+      case CONTENT:
+        return new asn1js.Any();
+      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
+   */
+  static compareWithDefault<T>(memberName: string, memberValue: T): memberValue is T {
+    switch (memberName) {
+      case CONTENT_TYPE:
+        return (typeof memberValue === "string" &&
+          memberValue === this.defaultValues(CONTENT_TYPE));
+      case CONTENT:
+        return (memberValue instanceof asn1js.Any);
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * ContentInfo ::= SEQUENCE {
+   *    contentType ContentType,
+   *    content [0] EXPLICIT ANY DEFINED BY contentType }
+   *```
+   */
+  public static override schema(parameters: ContentInfoSchema = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    if (("optional" in names) === false) {
+      names.optional = false;
+    }
+
+    return (new asn1js.Sequence({
+      name: (names.blockName || "ContentInfo"),
+      optional: names.optional,
+      value: [
+        new asn1js.ObjectIdentifier({ name: (names.contentType || CONTENT_TYPE) }),
+        new asn1js.Constructed({
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          },
+          value: [new asn1js.Any({ name: (names.content || CONTENT) })] // EXPLICIT ANY value
+        })
+      ]
+    }));
+  }
+
+  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,
+      ContentInfo.schema()
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    this.contentType = asn1.result.contentType.valueBlock.toString();
+    this.content = asn1.result.content;
+  }
+
+  public toSchema(): asn1js.Sequence {
+    //#region Construct and return new ASN.1 schema for this object
+    return (new asn1js.Sequence({
+      value: [
+        new asn1js.ObjectIdentifier({ value: this.contentType }),
+        new asn1js.Constructed({
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          },
+          value: [this.content] // EXPLICIT ANY value
+        })
+      ]
+    }));
+    //#endregion
+  }
+
+  public toJSON(): ContentInfoJson {
+    const object: ContentInfoJson = {
+      contentType: this.contentType
+    };
+
+    if (!(this.content instanceof asn1js.Any)) {
+      object.content = this.content.toJSON();
+    }
+
+    return object;
+  }
+
+}