1 files changed, 181 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/MessageImprint.ts b/third_party/js/PKI.js/src/MessageImprint.ts
new file mode 100644
index 0000000000..0684a9782c
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+++ b/third_party/js/PKI.js/src/MessageImprint.ts
@@ -0,0 +1,181 @@
+import * as asn1js from "asn1js";
+import * as pvutils from "pvutils";
+import { AlgorithmIdentifier, AlgorithmIdentifierJson, AlgorithmIdentifierSchema } from "./AlgorithmIdentifier";
+import { AsnError } from "./errors";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+import * as common from "./common";
+import { EMPTY_STRING } from "./constants";
+
+export const HASH_ALGORITHM = "hashAlgorithm";
+export const HASHED_MESSAGE = "hashedMessage";
+const CLEAR_PROPS = [
+  HASH_ALGORITHM,
+  HASHED_MESSAGE,
+];
+
+export interface IMessageImprint {
+  hashAlgorithm: AlgorithmIdentifier;
+  hashedMessage: asn1js.OctetString;
+}
+
+export interface MessageImprintJson {
+  hashAlgorithm: AlgorithmIdentifierJson;
+  hashedMessage: asn1js.OctetStringJson;
+}
+
+export type MessageImprintParameters = PkiObjectParameters & Partial<IMessageImprint>;
+
+export type MessageImprintSchema = Schema.SchemaParameters<{
+  hashAlgorithm?: AlgorithmIdentifierSchema;
+  hashedMessage?: string;
+}>;
+
+/**
+ * Represents the MessageImprint structure described in [RFC3161](https://www.ietf.org/rfc/rfc3161.txt)
+ */
+export class MessageImprint extends PkiObject implements IMessageImprint {
+
+  public static override CLASS_NAME = "MessageImprint";
+
+  /**
+   * Creates and fills a new instance of {@link MessageImprint}
+   * @param hashAlgorithm
+   * @param message
+   * @param crypto Crypto engine
+   * @returns New instance of {@link MessageImprint}
+   */
+  public static async create(hashAlgorithm: string, message: BufferSource, crypto = common.getCrypto(true)): Promise<MessageImprint> {
+    const hashAlgorithmOID = crypto.getOIDByAlgorithm({ name: hashAlgorithm }, true, "hashAlgorithm");
+
+    const hashedMessage = await crypto.digest(hashAlgorithm, message);
+
+    const res = new MessageImprint({
+      hashAlgorithm: new AlgorithmIdentifier({
+        algorithmId: hashAlgorithmOID,
+        algorithmParams: new asn1js.Null(),
+      }),
+      hashedMessage: new asn1js.OctetString({ valueHex: hashedMessage })
+    });
+
+    return res;
+  }
+
+  public hashAlgorithm!: AlgorithmIdentifier;
+  public hashedMessage!: asn1js.OctetString;
+
+  /**
+   * Initializes a new instance of the {@link MessageImprint} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: MessageImprintParameters = {}) {
+    super();
+
+    this.hashAlgorithm = pvutils.getParametersValue(parameters, HASH_ALGORITHM, MessageImprint.defaultValues(HASH_ALGORITHM));
+    this.hashedMessage = pvutils.getParametersValue(parameters, HASHED_MESSAGE, MessageImprint.defaultValues(HASHED_MESSAGE));
+
+    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 HASH_ALGORITHM): AlgorithmIdentifier;
+  public static override defaultValues(memberName: typeof HASHED_MESSAGE): asn1js.OctetString;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case HASH_ALGORITHM:
+        return new AlgorithmIdentifier();
+      case HASHED_MESSAGE:
+        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 HASH_ALGORITHM:
+        return ((memberValue.algorithmId === EMPTY_STRING) && (("algorithmParams" in memberValue) === false));
+      case HASHED_MESSAGE:
+        return (memberValue.isEqual(MessageImprint.defaultValues(memberName)) === 0);
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * MessageImprint ::= SEQUENCE  {
+   *    hashAlgorithm                AlgorithmIdentifier,
+   *    hashedMessage                OCTET STRING  }
+   *```
+   */
+  public static override schema(parameters: MessageImprintSchema = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Sequence({
+      name: (names.blockName || EMPTY_STRING),
+      value: [
+        AlgorithmIdentifier.schema(names.hashAlgorithm || {}),
+        new asn1js.OctetString({ name: (names.hashedMessage || EMPTY_STRING) })
+      ]
+    }));
+  }
+
+  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,
+      MessageImprint.schema({
+        names: {
+          hashAlgorithm: {
+            names: {
+              blockName: HASH_ALGORITHM
+            }
+          },
+          hashedMessage: HASHED_MESSAGE
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    this.hashAlgorithm = new AlgorithmIdentifier({ schema: asn1.result.hashAlgorithm });
+    this.hashedMessage = asn1.result.hashedMessage;
+  }
+
+  public toSchema(): asn1js.Sequence {
+    //#region Construct and return new ASN.1 schema for this object
+    return (new asn1js.Sequence({
+      value: [
+        this.hashAlgorithm.toSchema(),
+        this.hashedMessage
+      ]
+    }));
+    //#endregion
+  }
+
+  public toJSON(): MessageImprintJson {
+    return {
+      hashAlgorithm: this.hashAlgorithm.toJSON(),
+      hashedMessage: this.hashedMessage.toJSON(),
+    };
+  }
+
+}
+