Updated deps, added initial index.d.ts

Author: mharju

Diff for: ellipticcurve/ecdsa.js

@@ -1,4 +1,3 @@
-const sha256 = require("js-sha256");
 const BigInt = require("big-integer");
 
 const EcdsaMath = require("./math");
@@ -7,13 +6,16 @@ const BinaryAscii = require("./utils/binary");
 const Integer = require("./utils/integer");
 const randomInteger = Integer.between;
 const modulo = Integer.modulo;
+import * as Crypto from 'expo-crypto';
 
 
 exports.sign = async function (message, privateKey, hashfunc = null, randNum = null) {
     if (hashfunc == null) {
-        hashfunc = sha256;
+      hashfunc = async (message) => {
+        return await Crypto.digestStringAsync(Crypto.CryptoDigestAlgorithm.SHA256, message);
+      };
     }
-    let hashMessage = hashfunc(message);
+    let hashMessage = await hashfunc(message);
     let numberMessage = BinaryAscii.numberFromHex(hashMessage);
     let curve = privateKey.curve;
     if (randNum == null) {
@@ -26,8 +28,13 @@ exports.sign = async function (message, privateKey, hashfunc = null, randNum = n
 };
 
 
-exports.verify = function (message, signature, publicKey, hashfunc=sha256) {
-    let hashMessage = hashfunc(message);
+exports.verify = async function (message, signature, publicKey, hashfunc = null) {
+    if (hashfunc == null) {
+      hashfunc = async (message) => {
+        return await Crypto.digestStringAsync(Crypto.CryptoDigestAlgorithm.SHA256, message);
+      };
+    }
+    let hashMessage = await hashfunc(message);
     let numberMessage = BinaryAscii.numberFromHex(hashMessage);
     let curve = publicKey.curve;
     let sigR = signature.r;

Diff for: ellipticcurve/utils/integer.js

@@ -1,7 +1,7 @@
 // based on random-number-csprng: https://www.npmjs.com/package/random-number-csprng
 
 const BigInt = require("big-integer");
-import * as Random from 'expo-random';
+import * as Crypto from 'expo-crypto';
 
 
 
@@ -49,7 +49,7 @@ function calculateParameters(range) {
 
 
 async function secureRandomNumber(minimum, maximum) { // bigint, bigint
-    
+
     if (maximum.lesserOrEquals(minimum)) {
         throw new Error("The maximum value must be higher than the minimum value.")
     };
@@ -66,7 +66,7 @@ async function secureRandomNumber(minimum, maximum) { // bigint, bigint
 
     let {bitsNeeded, bytesNeeded, mask} = calculateParameters(range);
 
-    let randomBytes = await Random.getRandomBytesAsync(bytesNeeded);
+    let randomBytes = await Crypto.getRandomBytesAsync(bytesNeeded);
 
     var randomValue = BigInt(0);
 

Diff for: index.d.ts

@@ -0,0 +1,17 @@
+declare module 'starkbank-ecdsa' {
+  export module Ecdsa {
+    export async function sign(message: string, privateKey: PrivateKey, hashfunc: (s: string) => string = null, randNum: string = null): Signature;
+    export async function verify(message: string, signature: Signature, publicKey: PublicKey, hashfunc: (s: string) => string = null): bool;
+  }
+  export class PublicKey {
+    static fromPem(publicKeyPem: string);
+  }
+  export class PrivateKey {
+    static fromPem(publicKeyPem: string);
+  }
+  export class Signature {
+    toDer();
+    toBase64();
+    static fromBase64(s: string);
+  }
+}