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feat: support generating new keys according to spec

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Jan Christian Grünhage 2023-05-30 19:34:57 +02:00
commit ddc6e088f4
Signed by: jcgruenhage
GPG key ID: EEC1170CE56FA2ED
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[package]
name = "openpgp-key-janitor"
version = "0.1.0"
authors = ["Jan Christian Grünhage <jan.christian@gruenhage.xyz>"]
edition = "2021"
description = "CLI for OpenPGP certificate maintenance"
repository = "https://git.jcg.re/jcgruenhage/openpgp-key-janitor"
license-file = "LICENSE.md"
categories = ["command-line-utilities", "cryptography"]
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.71"
clap = { version = "4.3.0", features = ["derive"] }
humantime-serde = "1.1.1"
sequoia-openpgp = { version = "1.16.0", features = ["serde"] }
serde = { version = "1.0.163", features = ["derive"] }
serde_yaml = "0.9.21"
[patch.crates-io]
sequoia-openpgp = { git = "https://gitlab.com/sequoia-pgp/sequoia.git", branch = "jcgruenhage/serde-display-fromstr-ciphersuite" }

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# `openpgp-key-janitor`
> ⚠️ **Work in Progress (WIP)**
>
> **openpgp-key-janitor** is currently under development. It supports only key
> generation, with more features planned for the future. Contributions and
> feedback are welcome!
The "OpenPGP Key Janitor" is a command-line tool for creating and maintaining
OpenPGP keys.
## Installation
Use the package manager [cargo](https://doc.rust-lang.org/cargo/) to install it.
```bash
cargo install openpgp-key-janitor
```
## Usage
```
Usage: openpgp-key-janitor [OPTIONS] [DIR]
Arguments:
[DIR] Path to the directory it should operate on. Defaults to the current working directory
Options:
-h, --help Print help
-V, --version Print version
```
## Contributing
Pull requests are welcome. For major changes, please open an issue first
to discuss what you would like to change.
Please make sure to update tests as appropriate.
## License
[CNPLv7](https://thufie.lain.haus/NPL.html)

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*.asc

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---
validity_period: 2y
primary:
flags: [certify, sign]
cipher_suite: Cv25519
subs:
- flags: [encrypt_for_transport, encrypt_at_rest]
cipher_suite: Cv25519
validity_period: 3y
user_ids:
- value: "Alice Lovelace <alice@openpgp.example>"

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use std::{fs::write, path::PathBuf, time::Duration};
use anyhow::{anyhow, Context, Result};
use clap::Parser;
use serde::Deserialize;
use sequoia_openpgp::{
cert::CertBuilder,
packet::signature::SignatureBuilder,
serialize::SerializeInto,
types::{KeyFlags, SignatureType},
};
#[derive(Deserialize)]
struct Spec {
primary: KeyConfig,
subs: Vec<KeyConfig>,
user_ids: Vec<UserIdConfig>,
#[serde(flatten)]
expiry: Expiry,
}
#[derive(Deserialize)]
struct KeyConfig {
flags: Vec<KeyFlag>,
cipher_suite: sequoia_openpgp::cert::CipherSuite,
#[serde(flatten)]
expiry: Expiry,
}
#[derive(Deserialize)]
struct UserIdConfig {
value: String,
#[serde(default)]
notation: Vec<(String, String)>,
}
#[derive(Deserialize)]
struct Expiry {
#[serde(with = "humantime_serde::option", default)]
validity_period: Option<Duration>,
}
#[derive(Deserialize)]
#[serde(rename_all = "snake_case")]
enum KeyFlag {
Certify,
Sign,
EncryptForTransport,
EncryptAtRest,
SplitKey,
Authenticate,
GroupKey,
}
#[derive(Parser)]
#[command(author, version, about, long_about = None)]
struct Cli {
/// Path to the directory it should operate on. Defaults to the current working directory.
#[arg(value_name = "DIR")]
path: Option<PathBuf>,
}
struct Paths {
spec: PathBuf,
secret: PathBuf,
public: PathBuf,
rev: PathBuf,
}
impl Paths {
fn new(base: PathBuf) -> Paths {
let mut spec = base.clone();
spec.push("spec.yml");
let mut secret = base.clone();
secret.push("secret.asc");
let mut public = base.clone();
public.push("public.asc");
let mut rev = base;
rev.push("rev.asc");
Paths {
spec,
secret,
public,
rev,
}
}
}
impl KeyFlag {
fn apply(&self, flags: sequoia_openpgp::types::KeyFlags) -> sequoia_openpgp::types::KeyFlags {
match self {
Self::Certify => flags.set_certification(),
Self::Sign => flags.set_signing(),
Self::EncryptForTransport => flags.set_transport_encryption(),
Self::EncryptAtRest => flags.set_storage_encryption(),
Self::SplitKey => flags.set_split_key(),
Self::Authenticate => flags.set_authentication(),
Self::GroupKey => flags.set_group_key(),
}
}
}
fn main() -> Result<()> {
let cli = Cli::parse();
let base_dir = cli
.path
.ok_or_else(|| anyhow!("No path specified in CLI parameters."))
.or_else(|_| std::env::current_dir())
.context(
"Couldn't get current dir from env, and no path was specified in CLI parameters either",
)?;
let paths = Paths::new(base_dir);
let spec_string = std::fs::read_to_string(&paths.spec)?;
let spec: Spec = serde_yaml::from_str(&spec_string)?;
let mut primary_key_flags = KeyFlags::empty();
for flag in spec.primary.flags {
primary_key_flags = flag.apply(primary_key_flags);
}
let mut builder = CertBuilder::new()
.set_primary_key_flags(primary_key_flags)
.set_validity_period(
spec.primary
.expiry
.validity_period
.or(spec.expiry.validity_period),
)
.set_cipher_suite(spec.primary.cipher_suite);
for sub_key in spec.subs {
let mut sub_key_flags = KeyFlags::empty();
for flag in sub_key.flags {
sub_key_flags = flag.apply(sub_key_flags);
}
builder = builder.add_subkey_with(
sub_key_flags,
sub_key
.expiry
.validity_period
.or(spec.expiry.validity_period),
Some(sub_key.cipher_suite),
SignatureBuilder::new(SignatureType::SubkeyBinding),
)?;
}
for user_id in spec.user_ids {
let mut sig_builder = SignatureBuilder::new(SignatureType::PositiveCertification);
for (key, value) in user_id.notation {
sig_builder = sig_builder.add_notation(key, value, None, false)?;
}
builder = builder.add_userid_with(user_id.value, sig_builder)?;
}
let (cert, rev) = builder.generate()?;
write(&paths.public, cert.armored().to_vec()?)?;
write(&paths.secret, cert.as_tsk().armored().to_vec()?)?;
write(&paths.rev, cert.insert_packets(rev)?.armored().to_vec()?)?;
Ok(())
}