[EC-271] Refactor CryptoService - move symmetric encryption to EncryptService (#3042)

* move decryptFromBytes, decryptToBytes, and encryptToBytes from CryptoService to EncryptService
* leave redirects in CryptoService
* combine encryptService decryptFromBytes and decryptToBytes methods
* move parsing logic into EncArrayBuffer
* add tests

libs/common/spec/matchers/toEqualBuffer.spec.ts

@@ -0,0 +1,25 @@
+import { makeStaticByteArray } from "../utils";
+
+describe("toEqualBuffer custom matcher", () => {
+  it("matches identical ArrayBuffers", () => {
+    const array = makeStaticByteArray(10);
+    expect(array.buffer).toEqualBuffer(array.buffer);
+  });
+
+  it("matches an identical ArrayBuffer and Uint8Array", () => {
+    const array = makeStaticByteArray(10);
+    expect(array.buffer).toEqualBuffer(array);
+  });
+
+  it("doesn't match different ArrayBuffers", () => {
+    const array1 = makeStaticByteArray(10);
+    const array2 = makeStaticByteArray(10, 11);
+    expect(array1.buffer).not.toEqualBuffer(array2.buffer);
+  });
+
+  it("doesn't match a different ArrayBuffer and Uint8Array", () => {
+    const array1 = makeStaticByteArray(10);
+    const array2 = makeStaticByteArray(10, 11);
+    expect(array1.buffer).not.toEqualBuffer(array2);
+  });
+});