Finalise bls spec tests

tests/ef_tests/src/cases/bls_sign_msg.rs

@@ -0,0 +1,88 @@
+use super::*;
+use crate::case_result::compare_result;
+use bls::{SecretKey, Signature};
+use serde_derive::Deserialize;
+use types::EthSpec;
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct BlsSignInput {
+    pub privkey: String,
+    pub message: String,
+    pub domain: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct BlsSign {
+    pub input: BlsSignInput,
+    pub output: String,
+}
+
+impl YamlDecode for BlsSign {
+    fn yaml_decode(yaml: &String) -> Result<Self, Error> {
+        Ok(serde_yaml::from_str(&yaml.as_str()).unwrap())
+    }
+}
+
+impl EfTest for Cases<BlsSign> {
+    fn test_results<E: EthSpec>(&self) -> Vec<CaseResult> {
+        self.test_cases
+            .iter()
+            .enumerate()
+            .map(|(i, tc)| {
+                let result = sign_msg(
+                    &tc.input.privkey,
+                    &tc.input.message,
+                    &tc.input.domain,
+                    &tc.output,
+                );
+
+                CaseResult::new(i, tc, result)
+            })
+            .collect()
+    }
+}
+
+/// Execute a `compressed hash to g2` test case.
+fn sign_msg(
+    private_key: &String,
+    message: &String,
+    domain: &String,
+    output: &String,
+) -> Result<(), Error> {
+    // Convert private_key, message and domain to required types
+    let mut sk =
+        hex::decode(&private_key[2..]).map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
+    pad_to_48(&mut sk);
+    let sk = SecretKey::from_bytes(&sk).unwrap();
+    let msg =
+        hex::decode(&message[2..]).map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
+    let d = hex::decode(&domain[2..]).map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
+    let d = bytes_to_u64(&d);
+
+    let signature = Signature::new(&msg, d, &sk);
+
+    // Convert the output to one set of bytes
+    let decoded =
+        hex::decode(&output[2..]).map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
+
+    compare_result::<Vec<u8>, Vec<u8>>(&Ok(signature.as_bytes()), &Some(decoded))
+}
+
+// Converts a vector to u64 (from big endian)
+fn bytes_to_u64(array: &Vec<u8>) -> u64 {
+    let mut result: u64 = 0;
+    for (i, value) in array.iter().rev().enumerate() {
+        if i == 8 {
+            break;
+        }
+        result += u64::pow(2, i as u32 * 8) * (*value as u64);
+    }
+    result
+}
+
+// Increase the size of an array to 48 bytes
+fn pad_to_48(array: &mut Vec<u8>) {
+    while array.len() < 48 {
+        array.insert(0, 0);
+    }
+}