86 lines
2.7 KiB
Rust
86 lines
2.7 KiB
Rust
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use super::*;
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use crate::case_result::compare_result;
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use bls::hash_on_g2;
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use serde_derive::Deserialize;
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use types::EthSpec;
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#[derive(Debug, Clone, Deserialize)]
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pub struct BlsG2UncompressedInput {
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pub message: String,
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pub domain: String,
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}
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#[derive(Debug, Clone, Deserialize)]
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pub struct BlsG2Uncompressed {
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pub input: BlsG2UncompressedInput,
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pub output: Vec<Vec<String>>,
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}
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impl YamlDecode for BlsG2Uncompressed {
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fn yaml_decode(yaml: &String) -> Result<Self, Error> {
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Ok(serde_yaml::from_str(&yaml.as_str()).unwrap())
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}
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}
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impl EfTest for Cases<BlsG2Uncompressed> {
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fn test_results<E: EthSpec>(&self) -> Vec<CaseResult> {
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self.test_cases
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.iter()
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.enumerate()
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.map(|(i, tc)| {
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let result = compressed_hash(&tc.input.message, &tc.input.domain, &tc.output);
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CaseResult::new(i, tc, result)
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})
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.collect()
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}
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}
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/// Execute a `compressed hash to g2` test case.
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fn compressed_hash(
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message: &String,
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domain: &String,
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output: &Vec<Vec<String>>,
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) -> Result<(), Error> {
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// Convert message and domain to required types
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let msg =
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hex::decode(&message[2..]).map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
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let d = hex::decode(&domain[2..]).map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
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let d = bytes_to_u64(&d);
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// Calculate the point and convert it to compressed bytes
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let point = hash_on_g2(&msg, d);
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let mut point_bytes = [0 as u8; 288];
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point.getpx().geta().tobytearray(&mut point_bytes, 0);
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point.getpx().getb().tobytearray(&mut point_bytes, 48);
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point.getpy().geta().tobytearray(&mut point_bytes, 96);
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point.getpy().getb().tobytearray(&mut point_bytes, 144);
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point.getpz().geta().tobytearray(&mut point_bytes, 192);
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point.getpz().getb().tobytearray(&mut point_bytes, 240);
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// Convert the output to one set of bytes (x.a, x.b, y.a, y.b, z.a, z.b)
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let mut decoded: Vec<u8> = vec![];
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for coordinate in output {
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let mut decoded_part = hex::decode(&coordinate[0][2..])
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.map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
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decoded.append(&mut decoded_part);
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decoded_part = hex::decode(&coordinate[1][2..])
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.map_err(|e| Error::FailedToParseTest(format!("{:?}", e)))?;
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decoded.append(&mut decoded_part);
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}
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compare_result::<Vec<u8>, Vec<u8>>(&Ok(point_bytes.to_vec()), &Some(decoded))
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}
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// Converts a vector to u64 (from big endian)
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fn bytes_to_u64(array: &Vec<u8>) -> u64 {
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let mut result: u64 = 0;
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for (i, value) in array.iter().rev().enumerate() {
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if i == 8 {
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break;
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}
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result += u64::pow(2, i as u32 * 8) * (*value as u64);
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}
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result
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}
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