keyfork-pinentry: use multiline prompts at least for passphrase

keyfork-pinentry/Cargo.toml

@@ -11,7 +11,8 @@ authors = ["Ryan Heywood <ryan@distrust.co>"]
 # categories = ["api-bindings", "command-line-interface"]
 # license = "MIT OR Apache-2.0"
 license = "MIT"
-edition = "2018"
+# edition = "2018"
+edition = "2021"
 
 [dependencies]
 nom = { version = "7", default-features = false }

keyfork-pinentry/src/lib.rs

@@ -69,6 +69,24 @@ pub fn default_binary() -> Result<PathBuf> {
     which::which("pinentry-curses").map_err(Into::into)
 }
 
+fn convert_multiline(line: &str) -> String {
+    // convert into multiline
+    let mut converted_line = String::new();
+    let mut last_end = 0;
+    for (start, part) in line.match_indices(&['\n', '\r', '%']) {
+        converted_line.push_str(line.get(last_end..start).unwrap());
+        converted_line.push_str(match part {
+            "\n" => "%0A",
+            "\r" => "%0D",
+            "%" => "%25",
+            fb => panic!("expected index given to match_indices, got: {fb}"),
+        });
+        last_end = start + part.len();
+    }
+    converted_line.push_str(line.get(last_end..line.len()).unwrap());
+    converted_line
+}
+
 /// A dialog for requesting a passphrase from the user.
 pub struct PassphraseInput<'a> {
     binary: PathBuf,
@@ -211,7 +229,7 @@ impl<'a> PassphraseInput<'a> {
             pinentry.send_request("SETTITLE", Some(title))?;
         }
         if let Some(desc) = &self.description {
-            pinentry.send_request("SETDESC", Some(desc))?;
+            pinentry.send_request("SETDESC", Some(convert_multiline(desc).as_ref()))?;
         }
         if let Some(error) = &self.error {
             pinentry.send_request("SETERROR", Some(error))?;