chore: reorg

__crypto/crypto/src/main.rs

@@ -0,0 +1,31 @@
+use sha2::{Sha256, Sha512, Digest};
+
+fn main() {
+    println!("{}", to_hex(&sha256(b"hello world")));
+    println!("{}", to_hex(&sha512(b"hello world")));
+}
+
+fn sha256(data: &[u8]) -> Vec<u8> {
+    let mut hasher = Sha256::new();
+    hasher.input(data);
+    let result = hasher.result();
+    result[..].to_vec()
+}
+
+fn sha512(data: &[u8]) -> Vec<u8> {
+    let mut hasher = Sha512::new();
+    hasher.input(data);
+    let result = hasher.result();
+    result[..].to_vec()
+}
+
+fn to_hex(bs: &[u8]) -> String {
+    bs.iter().map(|u| {
+        let x = format!("{:x}", u);
+        if x.len() == 1 {
+            "0".to_owned() + &x
+         } else {
+             x
+         }
+    }).collect()
+}