generate keypair on registration

spec/node/services/nodeCryptoFunction.service.spec.ts

@@ -170,6 +170,15 @@ describe('NodeCrypto Function Service', () => {
         });
     });
 
+    describe('rsaGenerateKeyPair', () => {
+        testRsaGenerateKeyPair(1024);
+        testRsaGenerateKeyPair(2048);
+
+        // Generating 4096 bit keys is really slow with Forge lib.
+        // Maybe move to something else if we ever want to generate keys of this size.
+        // testRsaGenerateKeyPair(4096);
+    });
+
     describe('randomBytes', () => {
         it('should make a value of the correct length', async () => {
             const nodeCryptoFunctionService = new NodeCryptoFunctionService();
@@ -302,6 +311,16 @@ function testCompare(fast = false) {
     });
 }
 
+function testRsaGenerateKeyPair(length: 1024 | 2048 | 4096) {
+    it('should successfully generate a ' + length + ' bit key pair', async () => {
+        const cryptoFunctionService = new NodeCryptoFunctionService();
+        const keyPair = await cryptoFunctionService.rsaGenerateKeyPair(length);
+        expect(keyPair[0] == null || keyPair[1] == null).toBe(false);
+        const publicKey = await cryptoFunctionService.rsaExtractPublicKey(keyPair[1]);
+        expect(Utils.fromBufferToB64(keyPair[0])).toBe(Utils.fromBufferToB64(publicKey));
+    }, 10000);
+}
+
 function makeStaticByteArray(length: number) {
     const arr = new Uint8Array(length);
     for (let i = 0; i < length; i++) {