From 3b0e19ce80536aa98a86a60d8ea17da39f16057c Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Tue, 6 Apr 2021 11:05:56 +0300
Subject: compute checksums linearly

---
 Cargo.toml  |  1 +
 src/main.rs | 11 ++++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index b6c6e6c..31e161f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+sha2 = "0.9.3"
diff --git a/src/main.rs b/src/main.rs
index b37873b..32102f2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,9 @@
+use sha2::{Digest, Sha256};
+
 fn main() {
     let blobs = Blobs::new(128 * 1024);
     for blob in blobs.take(10) {
-        println!("{}", blob.len());
+        println!("{}", sha256(&blob));
     }
 }
 
@@ -22,3 +24,10 @@ impl Iterator for Blobs {
         Some(vec![0; self.size])
     }
 }
+
+fn sha256(data: &[u8]) -> String {
+    let mut hasher = Sha256::new();
+    hasher.update(data);
+    let hash = hasher.finalize();
+    format!("{:x}", hash)
+}
-- 
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