bellman: Migrate to sha2 0.9

Cargo.toml

@@ -27,7 +27,7 @@ subtle = "2.2.1"
 hex-literal = "0.2"
 rand = "0.7"
 rand_xorshift = "0.2"
-sha2 = "0.8"
+sha2 = "0.9"
 
 [features]
 groth16 = ["pairing"]

src/gadgets/sha256.rs

@@ -343,8 +343,8 @@ mod test {
         for input_len in (0..32).chain((32..256).filter(|a| a % 8 == 0)) {
             let mut h = Sha256::new();
             let data: Vec<u8> = (0..input_len).map(|_| rng.next_u32() as u8).collect();
-            h.input(&data);
-            let hash_result = h.result();
+            h.update(&data);
+            let hash_result = h.finalize();
 
             let mut cs = TestConstraintSystem::<Fr>::new();
             let mut input_bits = vec![];
@@ -366,7 +366,6 @@ mod test {
             assert!(cs.is_satisfied());
 
             let mut s = hash_result
-                .as_ref()
                 .iter()
                 .flat_map(|&byte| (0..8).rev().map(move |i| (byte >> i) & 1u8 == 1u8));