From ce657011e8667f59ddb6be8d441c91d57c97dd42 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Fri, 15 May 2020 01:04:23 +0800
Subject: [PATCH] add ring::sha256

---
 ring/src/main.rs | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/ring/src/main.rs b/ring/src/main.rs
index 02df33e..7b4d1d0 100644
--- a/ring/src/main.rs
+++ b/ring/src/main.rs
@@ -1,15 +1,26 @@
-use ring::{hmac, rand, error::Unspecified};
+use ring::{
+    hmac, rand, error::Unspecified,
+    digest,
+};
 
 fn main() -> Result<(), Unspecified> {
-    let rng = rand::SystemRandom::new();
-    let key = hmac::Key::generate(hmac::HMAC_SHA256, &rng)?;
+    {
+        println!("{} HHmac {}", "-".repeat(10), "-".repeat(10));
+        let rng = rand::SystemRandom::new();
+        let key = hmac::Key::generate(hmac::HMAC_SHA256, &rng)?;
 
-    let msg = "hello, world";
-    let tag = hmac::sign(&key, msg.as_bytes());
+        let msg = "hello, world";
+        let tag = hmac::sign(&key, msg.as_bytes());
 
-    println!("{:?}", tag);
-    hmac::verify(&key, msg.as_bytes(), tag.as_ref())?;
-    println!("Verify success");
+        println!("{:?}", tag);
+        hmac::verify(&key, msg.as_bytes(), tag.as_ref())?;
+        println!("Verify success");
+    }
+    {
+        println!("{} SHA256 {}", "-".repeat(10), "-".repeat(10));
+        let sha256 = digest::digest(&digest::SHA256, b"hello, world");
+        println!("{:?}", sha256);
+    }
 
     Ok(())
 }