1 files changed, 297 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/ECPrivateKey.ts b/third_party/js/PKI.js/src/ECPrivateKey.ts
new file mode 100644
index 0000000000..bc7b06df26
--- /dev/null
+++ b/third_party/js/PKI.js/src/ECPrivateKey.ts
@@ -0,0 +1,297 @@
+import * as asn1js from "asn1js";
+import * as pvtsutils from "pvtsutils";
+import * as pvutils from "pvutils";
+import { EMPTY_STRING } from "./constants";
+import { ECNamedCurves } from "./ECNamedCurves";
+import { ECPublicKey, ECPublicKeyParameters } from "./ECPublicKey";
+import { AsnError, ParameterError } from "./errors";
+import { PkiObject, PkiObjectParameters } from "./PkiObject";
+import * as Schema from "./Schema";
+
+const VERSION = "version";
+const PRIVATE_KEY = "privateKey";
+const NAMED_CURVE = "namedCurve";
+const PUBLIC_KEY = "publicKey";
+const CLEAR_PROPS = [
+  VERSION,
+  PRIVATE_KEY,
+  NAMED_CURVE,
+  PUBLIC_KEY
+];
+
+export interface IECPrivateKey {
+  version: number;
+  privateKey: asn1js.OctetString;
+  namedCurve?: string;
+  publicKey?: ECPublicKey;
+}
+
+export type ECPrivateKeyParameters = PkiObjectParameters & Partial<IECPrivateKey> & { json?: ECPrivateKeyJson; };
+
+export interface ECPrivateKeyJson {
+  crv: string;
+  y?: string;
+  x?: string;
+  d: string;
+}
+
+/**
+ * Represents the PrivateKeyInfo structure described in [RFC5915](https://datatracker.ietf.org/doc/html/rfc5915)
+ */
+export class ECPrivateKey extends PkiObject implements IECPrivateKey {
+
+  public static override CLASS_NAME = "ECPrivateKey";
+
+  public version!: number;
+  public privateKey!: asn1js.OctetString;
+  public namedCurve?: string;
+  public publicKey?: ECPublicKey;
+
+  /**
+   * Initializes a new instance of the {@link ECPrivateKey} class
+   * @param parameters Initialization parameters
+   */
+  constructor(parameters: ECPrivateKeyParameters = {}) {
+    super();
+
+    this.version = pvutils.getParametersValue(parameters, VERSION, ECPrivateKey.defaultValues(VERSION));
+    this.privateKey = pvutils.getParametersValue(parameters, PRIVATE_KEY, ECPrivateKey.defaultValues(PRIVATE_KEY));
+    if (NAMED_CURVE in parameters) {
+      this.namedCurve = pvutils.getParametersValue(parameters, NAMED_CURVE, ECPrivateKey.defaultValues(NAMED_CURVE));
+    }
+    if (PUBLIC_KEY in parameters) {
+      this.publicKey = pvutils.getParametersValue(parameters, PUBLIC_KEY, ECPrivateKey.defaultValues(PUBLIC_KEY));
+    }
+
+    if (parameters.json) {
+      this.fromJSON(parameters.json);
+    }
+
+    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 VERSION): 1;
+  public static override defaultValues(memberName: typeof PRIVATE_KEY): asn1js.OctetString;
+  public static override defaultValues(memberName: typeof NAMED_CURVE): string;
+  public static override defaultValues(memberName: typeof PUBLIC_KEY): ECPublicKey;
+  public static override defaultValues(memberName: string): any {
+    switch (memberName) {
+      case VERSION:
+        return 1;
+      case PRIVATE_KEY:
+        return new asn1js.OctetString();
+      case NAMED_CURVE:
+        return EMPTY_STRING;
+      case PUBLIC_KEY:
+        return new ECPublicKey();
+      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 VERSION:
+        return (memberValue === ECPrivateKey.defaultValues(memberName));
+      case PRIVATE_KEY:
+        return (memberValue.isEqual(ECPrivateKey.defaultValues(memberName)));
+      case NAMED_CURVE:
+        return (memberValue === EMPTY_STRING);
+      case PUBLIC_KEY:
+        return ((ECPublicKey.compareWithDefault(NAMED_CURVE, memberValue.namedCurve)) &&
+          (ECPublicKey.compareWithDefault("x", memberValue.x)) &&
+          (ECPublicKey.compareWithDefault("y", memberValue.y)));
+      default:
+        return super.defaultValues(memberName);
+    }
+  }
+
+  /**
+   * @inheritdoc
+   * @asn ASN.1 schema
+   * ```asn
+   * ECPrivateKey ::= SEQUENCE {
+   * version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
+   * privateKey     OCTET STRING,
+   * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
+   * publicKey  [1] BIT STRING OPTIONAL
+   * }
+   *```
+   */
+  public static override schema(parameters: Schema.SchemaParameters<{
+    version?: string;
+    privateKey?: string;
+    namedCurve?: string;
+    publicKey?: string;
+  }> = {}): Schema.SchemaType {
+    const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
+
+    return (new asn1js.Sequence({
+      name: (names.blockName || EMPTY_STRING),
+      value: [
+        new asn1js.Integer({ name: (names.version || EMPTY_STRING) }),
+        new asn1js.OctetString({ name: (names.privateKey || EMPTY_STRING) }),
+        new asn1js.Constructed({
+          optional: true,
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 0 // [0]
+          },
+          value: [
+            new asn1js.ObjectIdentifier({ name: (names.namedCurve || EMPTY_STRING) })
+          ]
+        }),
+        new asn1js.Constructed({
+          optional: true,
+          idBlock: {
+            tagClass: 3, // CONTEXT-SPECIFIC
+            tagNumber: 1 // [1]
+          },
+          value: [
+            new asn1js.BitString({ name: (names.publicKey || 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,
+      ECPrivateKey.schema({
+        names: {
+          version: VERSION,
+          privateKey: PRIVATE_KEY,
+          namedCurve: NAMED_CURVE,
+          publicKey: PUBLIC_KEY
+        }
+      })
+    );
+    AsnError.assertSchema(asn1, this.className);
+
+    //#region Get internal properties from parsed schema
+    this.version = asn1.result.version.valueBlock.valueDec;
+    this.privateKey = asn1.result.privateKey;
+
+    if (NAMED_CURVE in asn1.result) {
+      this.namedCurve = asn1.result.namedCurve.valueBlock.toString();
+    }
+
+    if (PUBLIC_KEY in asn1.result) {
+      const publicKeyData: ECPublicKeyParameters = { schema: asn1.result.publicKey.valueBlock.valueHex };
+      if (NAMED_CURVE in this) {
+        publicKeyData.namedCurve = this.namedCurve;
+      }
+
+      this.publicKey = new ECPublicKey(publicKeyData);
+    }
+    //#endregion
+  }
+
+  public toSchema(): asn1js.Sequence {
+    const outputArray: any = [
+      new asn1js.Integer({ value: this.version }),
+      this.privateKey
+    ];
+
+    if (this.namedCurve) {
+      outputArray.push(new asn1js.Constructed({
+        idBlock: {
+          tagClass: 3, // CONTEXT-SPECIFIC
+          tagNumber: 0 // [0]
+        },
+        value: [
+          new asn1js.ObjectIdentifier({ value: this.namedCurve })
+        ]
+      }));
+    }
+
+    if (this.publicKey) {
+      outputArray.push(new asn1js.Constructed({
+        idBlock: {
+          tagClass: 3, // CONTEXT-SPECIFIC
+          tagNumber: 1 // [1]
+        },
+        value: [
+          new asn1js.BitString({ valueHex: this.publicKey.toSchema().toBER(false) })
+        ]
+      }));
+    }
+
+    return new asn1js.Sequence({
+      value: outputArray
+    });
+  }
+
+  public toJSON(): ECPrivateKeyJson {
+    if (!this.namedCurve || ECPrivateKey.compareWithDefault(NAMED_CURVE, this.namedCurve)) {
+      throw new Error("Not enough information for making JSON: absent \"namedCurve\" value");
+    }
+
+    const curve = ECNamedCurves.find(this.namedCurve);
+
+    const privateKeyJSON: ECPrivateKeyJson = {
+      crv: curve ? curve.name : this.namedCurve,
+      d: pvtsutils.Convert.ToBase64Url(this.privateKey.valueBlock.valueHexView),
+    };
+
+    if (this.publicKey) {
+      const publicKeyJSON = this.publicKey.toJSON();
+
+      privateKeyJSON.x = publicKeyJSON.x;
+      privateKeyJSON.y = publicKeyJSON.y;
+    }
+
+    return privateKeyJSON;
+  }
+
+  /**
+   * Converts JSON value into current object
+   * @param json JSON object
+   */
+  public fromJSON(json: any): void {
+    ParameterError.assert("json", json, "crv", "d");
+
+    let coordinateLength = 0;
+
+    const curve = ECNamedCurves.find(json.crv);
+    if (curve) {
+      this.namedCurve = curve.id;
+      coordinateLength = curve.size;
+    }
+
+    const convertBuffer = pvtsutils.Convert.FromBase64Url(json.d);
+
+    if (convertBuffer.byteLength < coordinateLength) {
+      const buffer = new ArrayBuffer(coordinateLength);
+      const view = new Uint8Array(buffer);
+      const convertBufferView = new Uint8Array(convertBuffer);
+      view.set(convertBufferView, 1);
+
+      this.privateKey = new asn1js.OctetString({ valueHex: buffer });
+    } else {
+      this.privateKey = new asn1js.OctetString({ valueHex: convertBuffer.slice(0, coordinateLength) });
+    }
+
+    if (json.x && json.y) {
+      this.publicKey = new ECPublicKey({ json });
+    }
+  }
+
+}