1 files changed, 46 insertions, 0 deletions
diff --git a/lockchain-core/src/crypto/utils/random.rs b/lockchain-core/src/crypto/utils/random.rs
new file mode 100644
index 0000000..7d31992
--- /dev/null
+++ b/lockchain-core/src/crypto/utils/random.rs
@@ -0,0 +1,46 @@
+//! A small convenience wrapper around `rand`
+
+use rand::{thread_rng, Rng};
+
+/// Generate a random number with an upper bound
+pub fn number(bound: u64) -> u64 {
+    return thread_rng().next_u64() % bound;
+}
+
+/// Generate a sequence of random bytes that are returned
+/// as a vector.
+///
+/// Can at most allocate 2048 bytes at a time
+/// FIXME: That shouldn't have a limit!
+pub fn bytes(length: usize) -> Vec<u8> {
+    let mut vec: Vec<u8> = Vec::new();
+
+    if length > 2048 {
+        return vec;
+    }
+
+    let mut random_data = [0u8; 2048];
+    thread_rng().fill_bytes(&mut random_data);
+
+    for i in 0..length {
+        vec.push(random_data[i]);
+    }
+
+    return vec;
+}
+
+/// A small utility wraper around bcrypt to allow
+/// easy password checking.
+pub mod passwd {
+    use bcrypt::{self, DEFAULT_COST};
+
+    /// Create a new password, returning a hash
+    pub fn create(pw: &str) -> Option<String> {
+        Some(bcrypt::hash(pw, DEFAULT_COST).ok()?)
+    }
+
+    /// Verify a password against it's stored hash
+    pub fn verify(pw: &str, hash: &str) -> Option<bool> {
+        bcrypt::verify(pw, hash).ok()
+    }
+}