added: more error variants

server/src/api/extract.rs

@@ -21,7 +21,7 @@ where
             .context("failed to extract body")?;
 
         let cert = Certificate::from_openssh(&body)
-            .with_context(|| format!("failed to parse '{}'", body))?;
+            .with_context(|| format!("failed to parse '{}'", body)).map_err(ApiError::ParseCertificate)?;
         trace!(%body, "extracted certificate");
         Ok(Self(cert))
     }
@@ -42,7 +42,7 @@ where
             .await
             .context("failed to extract body")?;
 
-        let sig = SshSig::from_pem(&body).with_context(|| format!("failed to parse '{}'", body))?;
+        let sig = SshSig::from_pem(&body).with_context(|| format!("failed to parse '{}'", body)).map_err(ApiError::ParseSignature)?;
         trace!(%body, "extracted signature");
         Ok(Self(sig))
     }