stub out crypto function service with pbkdf2

package-lock.json

@@ -100,7 +100,7 @@
       "integrity": "sha512-PlKJw6ujJXLJjbvB3T0UCbY3jibKM6/Ya5cc9j1q+mYDeK3aR4Dp+20ZwxSuvJr9mIoPxp7+IL4aMOEvsscRTA==",
       "dev": true,
       "requires": {
-        "@types/node": "8.5.7"
+        "@types/node": "8.0.19"
       }
     },
     "@types/handlebars": {
@@ -140,9 +140,9 @@
       "dev": true
     },
     "@types/node": {
-      "version": "8.5.7",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.5.7.tgz",
-      "integrity": "sha512-+1ZfzGIq8Y3EV7hPF7bs3i+Gi2mqYOiEGGRxGYPrn+hTYLMmzg+/5TkMkCHiRtLB38XSNvr/43aQ9+cUq4BbBg==",
+      "version": "8.0.19",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.0.19.tgz",
+      "integrity": "sha512-VRQB+Q0L3YZWs45uRdpN9oWr82meL/8TrJ6faoKT5tp0uub2l/aRMhtm5fo68h7kjYKH60f9/bay1nF7ZpTW5g==",
       "dev": true
     },
     "@types/node-forge": {
@@ -163,7 +163,7 @@
       "integrity": "sha1-IpwVfGvB5n1rmQ5sXhjb0v9Yz/A=",
       "dev": true,
       "requires": {
-        "@types/node": "8.5.7"
+        "@types/node": "8.0.19"
       }
     },
     "@types/webcrypto": {

package.json

@@ -38,6 +38,7 @@
     "@angular/router": "5.2.0",
     "@angular/upgrade": "5.2.0",
     "@types/lunr": "2.1.5",
+    "@types/node": "8.0.19",
     "@types/node-forge": "0.7.1",
     "@types/papaparse": "4.1.31",
     "@types/webcrypto": "0.0.28",

src/abstractions/cryptoFunction.service.ts

@@ -0,0 +1,3 @@
+export abstract class CryptoFunctionService {
+    pbkdf2: (password: Buffer, salt: Buffer, iterations: number, length: number) => Promise<ArrayBuffer>
+}

src/services/nodeCryptoFunction.service.ts

@@ -0,0 +1,17 @@
+import * as crypto from 'crypto';
+
+import { CryptoFunctionService } from '../abstractions/cryptoFunction.service';
+
+export class NodeCryptoFunctionService implements CryptoFunctionService {
+    async pbkdf2(password: Buffer, salt: Buffer, iterations: number, length: number): Promise<ArrayBuffer> {
+        return new Promise<ArrayBuffer>((resolve, reject) => {
+            crypto.pbkdf2(password, salt, iterations, length, 'sha256', (error, key) => {
+                if (error != null) {
+                    reject(error);
+                } else {
+                    resolve(key.buffer);
+                }
+            });
+        });
+    }
+}

src/services/webCryptoFunction.service.ts

@@ -0,0 +1,42 @@
+import * as forge from 'node-forge';
+
+import { CryptoFunctionService } from '../abstractions/cryptoFunction.service';
+import { PlatformUtilsService } from '../abstractions/platformUtils.service';
+
+export class WebCryptoFunctionService implements CryptoFunctionService {
+    private crypto: Crypto;
+    private subtle: SubtleCrypto;
+
+    constructor(private win: Window, private platformUtilsService: PlatformUtilsService) {
+        this.crypto = win.crypto;
+        this.subtle = win.crypto.subtle;
+    }
+
+    async pbkdf2(password: Buffer, salt: Buffer, iterations: number, length: number): Promise<ArrayBuffer> {
+        const importedKey = await this.subtle.importKey('raw', password, { name: 'PBKDF2' },
+            false, ['deriveKey', 'deriveBits']);
+
+        const alg: Pbkdf2Params = {
+            name: 'PBKDF2',
+            salt: salt,
+            iterations: iterations,
+            hash: { name: 'SHA-256' },
+        };
+
+        const keyType: AesDerivedKeyParams = {
+            name: 'AES-CBC',
+            length: length,
+        };
+
+        const derivedKey = await this.subtle.deriveKey(alg, importedKey, keyType, true, ['encrypt', 'decrypt']);
+        return await this.subtle.exportKey('raw', derivedKey);
+    }
+
+    async sha1(value: Buffer): Promise<ArrayBuffer> {
+        if (this.platformUtilsService.isEdge()) {
+            return new Uint8Array([1]).buffer; // TODO: sha1 with forge
+        } else {
+            return await this.subtle.digest({ name: 'SHA-1' }, value);
+        }
+    }
+}