proxmox-acme/src/json.rs

   1 use openssl::hash::Hasher;
   2 use serde_json::Value;
   3
   4 use crate::Error;
   5
   6 pub fn to_hash_canonical(value: &Value, output: &mut Hasher) -> Result<(), Error> {
   7     match value {
   8         Value::Null | Value::String(_) | Value::Number(_) | Value::Bool(_) => {
   9             serde_json::to_writer(output, &value)?;
  10         }
  11         Value::Array(list) => {
  12             output.update(b"[")?;
  13             let mut iter = list.iter();
  14             if let Some(item) = iter.next() {
  15                 to_hash_canonical(item, output)?;
  16                 for item in iter {
  17                     output.update(b",")?;
  18                     to_hash_canonical(item, output)?;
  19                 }
  20             }
  21             output.update(b"]")?;
  22         }
  23         Value::Object(map) => {
  24             output.update(b"{")?;
  25             let mut keys: Vec<&str> = map.keys().map(String::as_str).collect();
  26             keys.sort_unstable();
  27             let mut iter = keys.into_iter();
  28             if let Some(key) = iter.next() {
  29                 serde_json::to_writer(&mut *output, &key)?;
  30                 output.update(b":")?;
  31                 to_hash_canonical(&map[key], output)?;
  32                 for key in iter {
  33                     output.update(b",")?;
  34                     serde_json::to_writer(&mut *output, &key)?;
  35                     output.update(b":")?;
  36                     to_hash_canonical(&map[key], output)?;
  37                 }
  38             }
  39             output.update(b"}")?;
  40         }
  41     }
  42     Ok(())
  43 }