1 files changed, 63 insertions, 0 deletions
diff --git a/app_expo/utils/keychain.ts b/app_expo/utils/keychain.ts
new file mode 100644
index 0000000..bcbc379
--- /dev/null
+++ b/app_expo/utils/keychain.ts
@@ -0,0 +1,63 @@
+import * as ReactNativeKeychain from 'react-native-keychain'
+
+/**
+ * Saves some credentials securely.
+ *
+ * @param username The username
+ * @param password The password
+ * @param server The server these creds are for.
+ */
+export async function save(username: string, password: string, server?: string) {
+  if (server) {
+    await ReactNativeKeychain.setInternetCredentials(server, username, password)
+    return true
+  } else {
+    return ReactNativeKeychain.setGenericPassword(username, password)
+  }
+}
+
+/**
+ * Loads credentials that were already saved.
+ *
+ * @param server The server that these creds are for
+ */
+export async function load(server?: string) {
+  if (server) {
+    const creds = await ReactNativeKeychain.getInternetCredentials(server)
+    return {
+      username: creds ? creds.username : null,
+      password: creds ? creds.password : null,
+      server,
+    }
+  } else {
+    const creds = await ReactNativeKeychain.getGenericPassword()
+    if (typeof creds === 'object') {
+      return {
+        username: creds.username,
+        password: creds.password,
+        server: null,
+      }
+    } else {
+      return {
+        username: null,
+        password: null,
+        server: null,
+      }
+    }
+  }
+}
+
+/**
+ * Resets any existing credentials for the given server.
+ *
+ * @param server The server which has these creds
+ */
+export async function reset(server?: string) {
+  if (server) {
+    await ReactNativeKeychain.resetInternetCredentials(server)
+    return true
+  } else {
+    const result = await ReactNativeKeychain.resetGenericPassword()
+    return result
+  }
+}