chore: addressed rand 0.9's deprecations

Author: kristof-mattei

postgres-protocol/src/authentication/sasl.rs

@@ -136,10 +136,10 @@ impl ScramSha256 {
     /// Constructs a new instance which will use the provided password for authentication.
     pub fn new(password: &[u8], channel_binding: ChannelBinding) -> ScramSha256 {
         // rand 0.5's ThreadRng is cryptographically secure
-        let mut rng = rand::thread_rng();
+        let mut rng = rand::rng();
         let nonce = (0..NONCE_LENGTH)
             .map(|_| {
-                let mut v = rng.gen_range(0x21u8..0x7e);
+                let mut v = rng.random_range(0x21u8..0x7e);
                 if v == 0x2c {
                     v = 0x7e
                 }

postgres-protocol/src/password/mod.rs

@@ -28,7 +28,7 @@ const SCRAM_DEFAULT_SALT_LEN: usize = 16;
 /// special characters that would require escaping in an SQL command.
 pub fn scram_sha_256(password: &[u8]) -> String {
     let mut salt: [u8; SCRAM_DEFAULT_SALT_LEN] = [0; SCRAM_DEFAULT_SALT_LEN];
-    let mut rng = rand::thread_rng();
+    let mut rng = rand::rng();
     rng.fill_bytes(&mut salt);
     scram_sha_256_salt(password, salt)
 }

tokio-postgres/src/connect.rs

@@ -44,7 +44,7 @@ where
 
     let mut indices = (0..num_hosts).collect::<Vec<_>>();
     if config.load_balance_hosts == LoadBalanceHosts::Random {
-        indices.shuffle(&mut rand::thread_rng());
+        indices.shuffle(&mut rand::rng());
     }
 
     let mut error = None;
@@ -101,7 +101,7 @@ where
                 .collect::<Vec<_>>();
 
             if config.load_balance_hosts == LoadBalanceHosts::Random {
-                addrs.shuffle(&mut rand::thread_rng());
+                addrs.shuffle(&mut rand::rng());
             }
 
             let mut last_err = None;