1 files changed, 162 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/DigestInfo.ts b/third_party/js/PKI.js/src/DigestInfo.ts
new file mode 100644
index 0000000000..232276b68d
--- /dev/null
+++ b/third_party/js/PKI.js/src/DigestInfo.ts
@@ -0,0 +1,162 @@
+import * as asn1js from "asn1js";
+import * as pvutils from "pvutils";
+import { AlgorithmIdentifier, AlgorithmIdentifierJson, AlgorithmIdentifierSchema } from "./AlgorithmIdentifier";
+import { EMPTY_STRING } from "./constants";
+import { AsnError } from "./errors";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const DIGEST_ALGORITHM = "digestAlgorithm";
+const DIGEST = "digest";
+const CLEAR_PROPS = [
+  DIGEST_ALGORITHM,
+  DIGEST
+];
+
+export interface IDigestInfo {
+  digestAlgorithm: AlgorithmIdentifier;
+  digest: asn1js.OctetString;
+}
+
+export interface DigestInfoJson {
+  digestAlgorithm: AlgorithmIdentifierJson;
+  digest: asn1js.OctetStringJson;
+}
+
+export type DigestInfoParameters = PkiObjectParameters & Partial<IDigestInfo>;
+
+export type DigestInfoSchema = Schema.SchemaParameters<{
+  digestAlgorithm?: AlgorithmIdentifierSchema;
+  digest?: string;
+}>;
+
+/**
+ * Represents the DigestInfo structure described in [RFC3447](https://datatracker.ietf.org/doc/html/rfc3447)
+ */
+export class DigestInfo extends PkiObject implements IDigestInfo {
+
+  public static override CLASS_NAME = "DigestInfo";
+
+  public digestAlgorithm!: AlgorithmIdentifier;
+  public digest!: asn1js.OctetString;
+
+  /**
+   * Initializes a new instance of the {@link DigestInfo} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: DigestInfoParameters = {}) {
+    super();
+
+    this.digestAlgorithm = pvutils.getParametersValue(parameters, DIGEST_ALGORITHM, DigestInfo.defaultValues(DIGEST_ALGORITHM));
+    this.digest = pvutils.getParametersValue(parameters, DIGEST, DigestInfo.defaultValues(DIGEST));
+
+    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 DIGEST_ALGORITHM): AlgorithmIdentifier;
+  public static override defaultValues(memberName: typeof DIGEST): asn1js.OctetString;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case DIGEST_ALGORITHM:
+        return new AlgorithmIdentifier();
+      case DIGEST:
+        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 DIGEST_ALGORITHM:
+        return ((AlgorithmIdentifier.compareWithDefault("algorithmId", memberValue.algorithmId)) &&
+          (("algorithmParams" in memberValue) === false));
+      case DIGEST:
+        return (memberValue.isEqual(DigestInfo.defaultValues(memberName)));
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * DigestInfo ::= SEQUENCE {
+   *    digestAlgorithm DigestAlgorithmIdentifier,
+   *    digest Digest }
+   *
+   * Digest ::= OCTET STRING
+   *```
+   */
+  public static override schema(parameters: DigestInfoSchema = {}): 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.digestAlgorithm || {
+          names: {
+            blockName: DIGEST_ALGORITHM
+          }
+        }),
+        new asn1js.OctetString({ name: (names.digest || DIGEST) })
+      ]
+    }));
+  }
+
+  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,
+      DigestInfo.schema({
+        names: {
+          digestAlgorithm: {
+            names: {
+              blockName: DIGEST_ALGORITHM
+            }
+          },
+          digest: DIGEST
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    // Get internal properties from parsed schema
+    this.digestAlgorithm = new AlgorithmIdentifier({ schema: asn1.result.digestAlgorithm });
+    this.digest = asn1.result.digest;
+  }
+
+  public toSchema(): asn1js.Sequence {
+    // Construct and return new ASN.1 schema for this object
+    return (new asn1js.Sequence({
+      value: [
+        this.digestAlgorithm.toSchema(),
+        this.digest
+      ]
+    }));
+  }
+
+  public toJSON(): DigestInfoJson {
+    return {
+      digestAlgorithm: this.digestAlgorithm.toJSON(),
+      digest: this.digest.toJSON(),
+    };
+  }
+
+}