scripts/generate-dependency-queue.py: doc how to run

crates/keyfork/src/cli/wizard.rs

@@ -11,16 +11,15 @@ use card_backend_pcsc::PcscBackend;
 use openpgp_card_sequoia::{state::Open, types::KeyType, Card};
 
 use keyfork_derive_openpgp::{
-    openpgp::{self, packet::UserID, types::KeyFlags, Cert, serialize::Marshal, armor::{Writer, Kind}},
+    openpgp::{self, packet::UserID, types::KeyFlags, Cert},
     XPrv,
 };
-use keyfork_derive_util::{DerivationIndex, DerivationPath, VariableLengthSeed};
+use keyfork_derive_util::{DerivationIndex, DerivationPath};
 use keyfork_prompt::{
     default_terminal,
     validators::{SecurePinValidator, Validator},
     DefaultTerminal, Message, PromptHandler,
 };
-use keyfork_mnemonic_util::Mnemonic;
 
 use keyfork_shard::{openpgp::OpenPGP, Format};
 
@@ -30,8 +29,6 @@ pub struct PinLength(usize);
 
 type Result<T, E = Box<dyn std::error::Error>> = std::result::Result<T, E>;
 
-// TODO: refactor to use mnemonic derived seed instead of 256 bit entropy to allow for possible
-// recovery in the future.
 fn derive_key(seed: [u8; 32], index: u8) -> Result<Cert> {
     let subkeys = vec![
         KeyFlags::empty().set_certification(),
@@ -193,42 +190,31 @@ fn generate_shard_secret(
     Ok(())
 }
 
-fn bottoms_up(key_discovery: &Path, threshold: u8, output_shardfile: &Path, output_cert: &Path, user_id: &str,) -> Result<()> {
-    let entropy = keyfork_entropy::generate_entropy_of_const_size::<{ 256 / 8 }>()?;
-    let mnemonic = Mnemonic::from_nonstandard_bytes(entropy);
-    // TODO: make this return const size, since is hash based
-    let seed = mnemonic.generate_seed(None);
-
-    // TODO: should this allow for customizing the account index from 0? Potential for key reuse
-    // errors.
-    let path = DerivationPath::default()
-        .chain_push(DerivationIndex::new(u32::from_be_bytes(*b"\x00pgp"), true)?)
-        .chain_push(DerivationIndex::new(u32::from_be_bytes(*b"\x00\x00dr"), true)?)
-        .chain_push(DerivationIndex::new(0, true)?);
-    let subkeys = [
-        KeyFlags::empty().set_certification(),
-        KeyFlags::empty().set_signing(),
-        KeyFlags::empty()
-            .set_transport_encryption()
-            .set_storage_encryption(),
-        KeyFlags::empty().set_authentication(),
-    ];
-    let xprv = XPrv::new(VariableLengthSeed::new(&seed))
-        .expect("could not construct master key from seed")
-        .derive_path(&path)?;
-    let userid = UserID::from(user_id);
-
-    let cert = keyfork_derive_openpgp::derive(xprv, &subkeys, &userid)?;
-    let certfile = File::create(output_cert)?;
-    let mut w = Writer::new(certfile, Kind::PublicKey)?;
-    cert.serialize(&mut w)?;
-    w.finalize()?;
+fn bottoms_up(key_discovery: &Path, threshold: u8, output: &Option<PathBuf>) -> Result<()> {
+    let seed = keyfork_entropy::generate_entropy_of_const_size::<{ 256 / 8 }>()?;
+    let stdout = std::io::stdout();
+    if output.is_none() {
+        assert!(
+            !stdout.is_terminal(),
+            "not printing shard to terminal, redirect output"
+        );
+    }
 
     let opgp = OpenPGP::<DefaultTerminal>::new();
     let certs = OpenPGP::<DefaultTerminal>::discover_certs(key_discovery)?;
 
-    let shardfile = File::create(output_shardfile)?;
-    opgp.shard_and_encrypt(threshold, certs.len() as u8, &entropy, &certs[..], shardfile)?;
+    if let Some(output_file) = output {
+        let output = File::create(output_file)?;
+        opgp.shard_and_encrypt(threshold, certs.len() as u8, &seed, &certs[..], output)?;
+    } else {
+        opgp.shard_and_encrypt(
+            threshold,
+            certs.len() as u8,
+            &seed,
+            &certs[..],
+            std::io::stdout(),
+        )?;
+    }
 
     Ok(())
 }
@@ -273,15 +259,7 @@ pub enum WizardSubcommands {
 
         /// The file to write the generated shard file to.
         #[arg(long)]
-        output_shardfile: PathBuf,
-
-        /// The file to write the generated OpenPGP certificate to.
-        #[arg(long)]
-        output_cert: PathBuf,
-
-        /// The User ID for the generated OpenPGP certificate.
-        #[arg(long, default_value = "Disaster Recovery")]
-        user_id: String,
+        output: Option<PathBuf>,
     },
 }
 
@@ -297,10 +275,8 @@ impl WizardSubcommands {
             WizardSubcommands::BottomsUp {
                 key_discovery,
                 threshold,
-                output_shardfile,
-                output_cert,
-                user_id,
-            } => bottoms_up(key_discovery, *threshold, output_shardfile, output_cert, user_id),
+                output,
+            } => bottoms_up(key_discovery, *threshold, output),
         }
     }
 }