1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/rust/fxa-client/src/util.rs b/third_party/rust/fxa-client/src/util.rs
new file mode 100644
index 0000000000..8a2726f06c
--- /dev/null
+++ b/third_party/rust/fxa-client/src/util.rs
@@ -0,0 +1,46 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use crate::error::*;
+use rc_crypto::rand;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+// Gets the unix epoch in ms.
+pub fn now() -> u64 {
+    let since_epoch = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .expect("Something is very wrong.");
+    since_epoch.as_secs() * 1000 + u64::from(since_epoch.subsec_nanos()) / 1_000_000
+}
+
+pub fn now_secs() -> u64 {
+    let since_epoch = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .expect("Something is very wrong.");
+    since_epoch.as_secs()
+}
+
+pub fn random_base64_url_string(len: usize) -> Result<String> {
+    let mut out = vec![0u8; len];
+    rand::fill(&mut out)?;
+    Ok(base64::encode_config(&out, base64::URL_SAFE_NO_PAD))
+}
+
+pub trait Xorable {
+    fn xored_with(&self, other: &[u8]) -> Result<Vec<u8>>;
+}
+
+impl Xorable for [u8] {
+    fn xored_with(&self, other: &[u8]) -> Result<Vec<u8>> {
+        if self.len() != other.len() {
+            Err(ErrorKind::XorLengthMismatch(self.len(), other.len()).into())
+        } else {
+            Ok(self
+                .iter()
+                .zip(other.iter())
+                .map(|(&x, &y)| x ^ y)
+                .collect())
+        }
+    }
+}