1 files changed, 28 insertions, 0 deletions
diff --git a/crates/shirabe/src/self_update/keys.rs b/crates/shirabe/src/self_update/keys.rs
index a1d30ff..b1da7b5 100644
--- a/crates/shirabe/src/self_update/keys.rs
+++ b/crates/shirabe/src/self_update/keys.rs
@@ -1 +1,29 @@
 //! ref: composer/src/Composer/SelfUpdate/Keys.php
+
+use anyhow::Result;
+use regex::Regex;
+use shirabe_php_shim::hash;
+
+pub struct Keys;
+
+impl Keys {
+    pub fn fingerprint(path: &str) -> Result<String> {
+        let content = std::fs::read_to_string(path)?;
+        let re = Regex::new(r"\s").unwrap();
+        let cleaned = re.replace_all(&content, "");
+        let hash = hash("sha256", &cleaned).to_uppercase();
+
+        Ok([
+            &hash[0..8],
+            &hash[8..16],
+            &hash[16..24],
+            &hash[24..32],
+            "",
+            &hash[32..40],
+            &hash[40..48],
+            &hash[48..56],
+            &hash[56..64],
+        ]
+        .join(" "))
+    }
+}