use ring::digest::Context;use ring::digest::SHA256;
pub fn gen(v: &[impl AsRef<[u8]>]) -> String { let mut ctx = Context::new(&SHA256); for src in v { ctx.update(src.as_ref()); } let digest = ctx.finish(); let out: Vec<String> = digest .as_ref() .iter() .map(|byte| format!("{:02x}", byte)) .collect(); out.join("")}
#[cfg(test)]mod tests { use super::*;
#[test] fn test_gen() { let actual = gen(&[b"hello world"]); assert_eq!( actual, "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9" ); }}