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keyfork-derive-openpgp: convert to lib+bin

This commit is contained in:
Ryan Heywood 2023-10-01 04:26:07 -05:00
parent 0a84d47a4d
commit 0119e58d2d
Signed by: ryan
GPG Key ID: 8E401478A3FBEF72
4 changed files with 125 additions and 68 deletions
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1
Cargo.lock generated
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@ -893,6 +893,7 @@ dependencies = [
name = "keyfork-derive-openpgp"
version = "0.1.0"
dependencies = [
"anyhow",
"ed25519-dalek",
"keyfork-derive-util",
"keyforkd-client",

1
keyfork-derive-openpgp/Cargo.toml
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@ -6,6 +6,7 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.75"
ed25519-dalek = "2.0.0"
keyfork-derive-util = { version = "0.1.0", path = "../keyfork-derive-util", default-features = false, features = ["ed25519"] }
keyforkd-client = { version = "0.1.0", path = "../keyforkd-client", default-features = false, features = ["ed25519"] }

121
keyfork-derive-openpgp/src/lib.rs Normal file
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@ -0,0 +1,121 @@
use std::time::{Duration, SystemTime, SystemTimeError};
use ed25519_dalek::SigningKey;
use keyfork_derive_util::{
request::{DerivationResponse, TryFromDerivationResponseError},
DerivationIndex, ExtendedPrivateKey, PrivateKey,
};
use sequoia_openpgp::{
packet::{
key::{Key4, PrimaryRole, SubordinateRole},
signature::SignatureBuilder,
Key, UserID,
},
types::{KeyFlags, SignatureType},
Cert, Packet,
};
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("{0}")]
Anyhow(#[from] anyhow::Error),
#[error("Incorrect derived data: {0}")]
IncorrectDerivedData(#[from] TryFromDerivationResponseError),
#[error("Could not create derivation index: {0}")]
Index(#[from] keyfork_derive_util::index::Error),
#[error("Could not perform operation against private key: {0}")]
PrivateKey(#[from] keyfork_derive_util::extended_key::private_key::Error),
#[error("Invalid system time: {0}")]
SystemTime(#[from] SystemTimeError),
#[error("First key in certificate must have certify capability")]
NotCert,
#[error("Index out of bounds: {0}")]
IndexOutOfBounds(#[from] std::num::TryFromIntError),
}
pub type Result<T, E = Error> = std::result::Result<T, E>;
pub fn derive(data: DerivationResponse, keys: &[KeyFlags], userid: UserID) -> Result<Cert> {
let primary_key_flags = match keys.get(0) {
Some(kf) if kf.for_certification() => kf,
_ => return Err(Error::NotCert),
};
let epoch = SystemTime::UNIX_EPOCH + Duration::from_secs(1);
let one_day = SystemTime::now() + Duration::from_secs(60 * 60 * 24);
// Create certificate with initial key and signature
let xprv = ExtendedPrivateKey::<SigningKey>::try_from(data)?;
let derived_primary_key = xprv.derive_child(&DerivationIndex::new(0, true)?)?;
let primary_key = Key::from(Key4::<_, PrimaryRole>::import_secret_ed25519(
&PrivateKey::to_bytes(derived_primary_key.private_key()),
epoch,
)?);
let cert = Cert::from_packets(vec![Packet::SecretKey(primary_key.clone())].into_iter())?;
// Sign and attach primary key and primary userid
let builder = SignatureBuilder::new(SignatureType::PositiveCertification)
.set_key_validity_period(one_day.duration_since(epoch)?)?
.set_signature_creation_time(epoch)?
.set_key_flags(primary_key_flags.clone())?;
let binding = userid.bind(&mut primary_key.clone().into_keypair()?, &cert, builder)?;
let cert = cert.insert_packets(vec![Packet::from(userid.clone()), binding.into()])?;
let policy = sequoia_openpgp::policy::StandardPolicy::new();
// Set certificate expiration to one day
let mut keypair = primary_key.clone().into_keypair()?;
let signatures = cert.set_expiration_time(&policy, None, &mut keypair, Some(one_day))?;
let cert = cert.insert_packets(signatures)?;
let mut cert = cert;
for (index, subkey_flags) in keys.iter().enumerate().skip(1) {
// Generate subkey
let index = u32::try_from(index)?;
let derived_key = xprv.derive_child(&DerivationIndex::new(index, true)?)?;
let subkey = Key::from(
Key4::<_, SubordinateRole>::import_secret_ed25519(
&PrivateKey::to_bytes(derived_key.private_key()),
epoch,
)
.unwrap(),
);
// As per OpenPGP spec, signing keys must backsig the primary key
let builder = if subkey_flags.for_signing() {
SignatureBuilder::new(SignatureType::SubkeyBinding)
.set_key_flags(subkey_flags.clone())?
.set_signature_creation_time(epoch)?
.set_key_validity_period(one_day.duration_since(epoch)?)?
.set_embedded_signature(
SignatureBuilder::new(SignatureType::PrimaryKeyBinding)
.set_signature_creation_time(epoch)?
.sign_primary_key_binding(
&mut subkey.clone().into_keypair()?,
&primary_key,
&subkey,
)?,
)?
} else {
SignatureBuilder::new(SignatureType::SubkeyBinding)
.set_key_flags(subkey_flags.clone())?
.set_signature_creation_time(epoch)?
.set_key_validity_period(one_day.duration_since(epoch)?)?
};
// Sign subkey with primary key and attach to cert
let binding =
builder.sign_subkey_binding(&mut primary_key.clone().into_keypair()?, None, &subkey)?;
cert = cert.insert_packets(vec![
Packet::SecretSubkey(subkey.clone()),
Packet::Signature(binding),
])?;
}
Ok(cert)
}

70
keyfork-derive-openpgp/src/main.rs
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@ -121,75 +121,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
let request = DerivationRequest::new(DerivationAlgorithm::Ed25519, &path);
let derived_data = Client::discover_socket()?.request(&request)?;
let xprv = ExtendedPrivateKey::<SigningKey>::try_from(&derived_data)?;
let subkeys = subkey_format.iter().map(|kt| kt.inner().clone()).collect::<Vec<_>>();
let derived_key = xprv.derive_child(&DerivationIndex::new(0, true)?)?;
let epoch = SystemTime::UNIX_EPOCH + Duration::from_secs(1);
let one_day = SystemTime::now() + Duration::from_secs(60 * 60 * 24);
let primary_key = Key::from(
Key4::<_, PrimaryRole>::import_secret_ed25519(
&PrivateKey::to_bytes(derived_key.private_key()),
epoch,
)
.unwrap(),
);
let cert =
Cert::from_packets(vec![Packet::SecretKey(primary_key.clone())].into_iter()).unwrap();
let builder = SignatureBuilder::new(SignatureType::PositiveCertification)
.set_key_validity_period(one_day.duration_since(epoch)?)?
.set_signature_creation_time(epoch)?
.set_key_flags(subkey_format[0].inner().clone())?;
let binding = default_userid.bind(&mut primary_key.clone().into_keypair()?, &cert, builder)?;
let cert = cert.insert_packets(vec![Packet::from(default_userid), binding.into()])?;
let policy = sequoia_openpgp::policy::StandardPolicy::new();
let mut keypair = cert
.primary_key()
.key()
.clone()
.parts_into_secret()?
.into_keypair()?;
let signatures = cert.set_expiration_time(&policy, None, &mut keypair, Some(one_day))?;
let mut cert = cert.insert_packets(signatures)?;
for (index, subkey_flags) in subkey_format.iter().enumerate().skip(1) {
let index = u32::try_from(index)?;
let derived_key = xprv.derive_child(&DerivationIndex::new(index, true)?)?;
let subkey = Key::from(
Key4::<_, SubordinateRole>::import_secret_ed25519(
&PrivateKey::to_bytes(derived_key.private_key()),
epoch,
)
.unwrap(),
);
let builder = if subkey_flags.inner().for_signing() {
SignatureBuilder::new(SignatureType::SubkeyBinding)
.set_key_flags(subkey_flags.inner().clone())?
.set_signature_creation_time(epoch)?
.set_key_validity_period(one_day.duration_since(epoch)?)?
.set_embedded_signature(
SignatureBuilder::new(SignatureType::PrimaryKeyBinding)
.set_signature_creation_time(epoch)?
.sign_primary_key_binding(
&mut subkey.clone().into_keypair()?,
&primary_key,
&subkey,
)?,
)?
} else {
SignatureBuilder::new(SignatureType::SubkeyBinding)
.set_key_flags(subkey_flags.inner().clone())?
.set_signature_creation_time(epoch)?
.set_key_validity_period(one_day.duration_since(epoch)?)?
};
let binding =
builder.sign_subkey_binding(&mut primary_key.clone().into_keypair()?, None, &subkey)?;
cert = cert.insert_packets(vec![
Packet::SecretSubkey(subkey.clone()),
Packet::Signature(binding),
])?;
}
let cert = keyfork_derive_openpgp::derive(derived_data, subkeys.as_slice(), default_userid)?;
use sequoia_openpgp::{
armor::{Kind, Writer},