Add 'sapling-crypto/' from commit '21084bde2019c04bd34208e63c3560fe2c02fb0e'

git-subtree-dir: sapling-crypto git-subtree-mainline: 9f748554d0 git-subtree-split: 21084bde20
2018-08-28 23:04:13 +01:00
parent 9f748554d0 21084bde20
commit 051027cb6d
39 changed files with 12220 additions and 0 deletions
@@ -0,0 +1,42 @@
+use pairing::{Engine};
+use bellman::{ConstraintSystem, SynthesisError};
+use circuit::sha256::{
+    sha256
+};
+use circuit::boolean::{
+    Boolean
+};
+
+pub fn note_comm<E, CS>(
+    cs: CS,
+    a_pk: &[Boolean],
+    value: &[Boolean],
+    rho: &[Boolean],
+    r: &[Boolean]
+) -> Result<Vec<Boolean>, SynthesisError>
+    where E: Engine, CS: ConstraintSystem<E>
+{
+    assert_eq!(a_pk.len(), 256);
+    assert_eq!(value.len(), 64);
+    assert_eq!(rho.len(), 256);
+    assert_eq!(r.len(), 256);
+
+    let mut image = vec![];
+    image.push(Boolean::constant(true));
+    image.push(Boolean::constant(false));
+    image.push(Boolean::constant(true));
+    image.push(Boolean::constant(true));
+    image.push(Boolean::constant(false));
+    image.push(Boolean::constant(false));
+    image.push(Boolean::constant(false));
+    image.push(Boolean::constant(false));
+    image.extend(a_pk.iter().cloned());
+    image.extend(value.iter().cloned());
+    image.extend(rho.iter().cloned());
+    image.extend(r.iter().cloned());
+
+    sha256(
+        cs,
+        &image
+    )
+}