internal: incomplete vault systems behind feature flag (#2340)

packages/snjs/mocha/lib/fake_web_crypto.js

@@ -158,8 +158,39 @@ export default class FakeWebCrypto {
     return data.message
   }
 
-  sodiumCryptoBoxGenerateKeypair() {
-    return { publicKey: this.randomString(64), privateKey: this.randomString(64), keyType: 'x25519' }
+  sodiumCryptoSign(message, secretKey) {
+    const data = {
+      message,
+      secretKey,
+    }
+    return btoa(JSON.stringify(data))
+  }
+
+  sodiumCryptoKdfDeriveFromKey(key, subkeyNumber, subkeyLength, context) {
+    return btoa(key + subkeyNumber + subkeyLength + context)
+  }
+
+  sodiumCryptoGenericHash(message, key) {
+    return btoa(message + key)
+  }
+
+  sodiumCryptoSignVerify(message, signature, publicKey) {
+    return true
+  }
+
+  sodiumCryptoBoxSeedKeypair(seed) {
+    return {
+      privateKey: seed,
+      publicKey: seed,
+    }
+  }
+
+
+  sodiumCryptoSignSeedKeypair(seed) {
+    return {
+      privateKey: seed,
+      publicKey: seed,
+    }
   }
 
   generateOtpSecret() {