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feat: add capsula-pki-server REST API with OpenAPI documentation
- Create new PKI Certificate Authority server using Axum framework - Implement REST endpoints for certificate and CA management - Add OpenAPI/Swagger UI documentation at /swagger-ui - Remove JWT authentication for testing convenience - Support certificate creation, retrieval, listing, and revocation - Integrate with capsula-pki for PKI operations - Configure CORS for cross-origin requests - Add structured error handling with AppError type 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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Cargo.toml

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members = [
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"crates/capsula-crypto",
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"crates/capsula-pki",
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"crates/capsula-pki-server",
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"crates/capsula-api",
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"crates/capsula-cli",
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"crates/capsula-key",
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[package]
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name = "capsula-pki-server"
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version = "0.1.0"
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edition = "2021"
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authors = ["ancient <gamesworldcraft@gmail.com>"]
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description = "PKI Certificate Authority server with REST API"
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[dependencies]
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# Capsula crates
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capsula-pki = { path = "../capsula-pki" }
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capsula-key = { path = "../capsula-key" }
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capsula-crypto = { path = "../capsula-crypto" }
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# Web framework
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tracing = "0.1"
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tracing-subscriber = { version = "0.3", features = [
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"env-filter",
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"fmt",
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"time",
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] }
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tracing-appender = "0.2"
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tokio = { version = "1", features = ["full"] }
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axum = { version = "0.8", features = ["macros"] }
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serde = { version = "1", features = ["derive"] }
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serde_json = "1"
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validator = { version = "0.20", features = ["derive"] }
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thiserror = "2"
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# API documentation
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utoipa = { version = "5", features = ["axum_extras", "uuid", "chrono"] }
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utoipa-swagger-ui = { version = "9", features = ["axum"] }
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utoipa-axum = { version = "0.2" }
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# Utilities
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toolcraft-axum-kit = { version = "0.2.3" }
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toolcraft-config = { version = "0.2.0" }
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toolcraft-utils = { version = "0.2.0" }
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chrono = { version = "0.4", features = ["serde"] }
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base64 = "0.22"
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uuid = { version = "1.0", features = ["v4", "serde"] }
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# Capsula PKI Server
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A REST API server for Certificate Authority and PKI management, built with Axum and using the Capsula PKI crate.
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## Features
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- **Certificate Authority Management**
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- Initialize CA
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- Get CA status and certificate
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- Health check endpoints
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- **Certificate Management**
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- Generate new certificates with RSA, P256, or Ed25519 keys
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- Retrieve certificates by ID
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- List certificates with filtering
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- Revoke certificates with reason codes
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- **OpenAPI Documentation**
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- Swagger UI at `/swagger-ui`
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- API documentation at `/api-docs/openapi.json`
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## Configuration
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Configure the server using `config/services.toml`:
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```toml
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[http]
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port = 19878
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[pki]
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ca_storage_path = "./storage/ca"
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cert_storage_path = "./storage/certificates"
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default_validity_days = 365
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```
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## API Endpoints
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### Certificate Authority
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- `GET /api/v1/ca/status` - Get CA status
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- `GET /api/v1/ca/certificate` - Get CA certificate
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- `POST /api/v1/ca/init` - Initialize CA
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- `GET /health` - Health check
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### Certificate Management
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- `POST /api/v1/certificates` - Generate new certificate
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- `GET /api/v1/certificates/{id}` - Get certificate by ID
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- `GET /api/v1/certificates` - List certificates
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- `POST /api/v1/certificates/{id}/revoke` - Revoke certificate
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## Running the Server
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```bash
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cargo run --package capsula-pki-server
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```
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The server will start on the configured port (default: 19878) and the Swagger UI will be available at `http://localhost:19878/swagger-ui`.
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## Development Status
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This is a work in progress. Current implementation includes:
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- ✅ REST API structure and routing
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- ✅ OpenAPI documentation
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- ✅ Request/response models
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- 🚧 Certificate generation (using capsula-pki)
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- 🚧 CA initialization and management
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- 🚧 Certificate storage
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- 🚧 Certificate revocation and CRL
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## Dependencies
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- `capsula-pki` - PKI operations and certificate management
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- `capsula-key` - Cryptographic key operations
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- `capsula-crypto` - Cryptographic primitives
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- `axum` - Web framework
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- `utoipa` - OpenAPI documentation generation
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services.toml
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[http]
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port = 19878
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[jwt]
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audience = "test"
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access_token_duration = 10800 # 3 hours
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refresh_token_duration = 604800 # 1 week
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access_key_validate_exp = false
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refresh_key_validate_exp = false
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access_secret = "3a5df12e1fc87ad045e1767e3f6a285da64139de0199f3d7b1d869f03d8eae30e130bacc2018d8c2e1dced55eac6fbb45f0cf283a5f64dc75a886ac8fd3937e5"
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refresh_secret = "b26f570b5d72795815f898cea04a4234a932cded824081767698e58e13ff849f3b6e23fe34efb4f6d78e342f1be4eace18135994e51a070c605c6dc9698a5fab"
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2025-09-13T13:04:41.919266Z  INFO capsula_pki_server: PKI Server started on port 19878
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#[allow(dead_code)]
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pub const SERVER_ERROR: i16 = -1;
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pub mod error_code;
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use axum::{
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Json,
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http::StatusCode,
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response::{IntoResponse, Response},
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};
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use serde_json::json;
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use thiserror::Error;
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#[derive(Error, Debug)]
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#[allow(dead_code)]
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pub enum AppError {
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#[error("config error: {0}")]
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#[allow(clippy::enum_variant_names)]
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ConfigError(#[from] toolcraft_config::error::Error),
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#[error("validation error: {0}")]
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#[allow(clippy::enum_variant_names)]
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ValidationError(#[from] validator::ValidationErrors),
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#[error("not found: {0}")]
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NotFound(String),
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#[error("PKI error: {0}")]
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PkiError(String),
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#[error("internal error: {0}")]
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Internal(String),
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}
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// Keep the old Error type as alias for backward compatibility
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pub type Error = AppError;
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impl IntoResponse for AppError {
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fn into_response(self) -> Response {
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let (status, error_message) = match self {
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AppError::ConfigError(ref e) => (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()),
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AppError::ValidationError(ref e) => (StatusCode::BAD_REQUEST, e.to_string()),
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AppError::NotFound(ref e) => (StatusCode::NOT_FOUND, e.to_string()),
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AppError::PkiError(ref e) => (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()),
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AppError::Internal(ref e) => (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()),
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};
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let body = Json(json!({
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"error": error_message,
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}));
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(status, body).into_response()
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}
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}
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pub type Result<T, E = AppError> = core::result::Result<T, E>;
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//! Certificate Authority management handlers
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use axum::{
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http::StatusCode,
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response::Json,
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};
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use utoipa_axum::router::OpenApiRouter;
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use utoipa_axum::routes;
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use crate::models::ca::{CaInfo, CaInitRequest, CaStatus};
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use crate::error::AppError;
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/// Get CA status and information
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#[utoipa::path(
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get,
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path = "/api/v1/ca/status",
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responses(
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(status = 200, description = "CA status retrieved successfully", body = CaStatus),
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(status = 500, description = "Internal server error")
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),
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tag = "ca"
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)]
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pub async fn get_ca_status() -> Result<Json<CaStatus>, AppError> {
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tracing::info!("Getting CA status");
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// TODO: Implement CA status check
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// 1. Check if CA is initialized
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// 2. Get CA certificate information
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// 3. Get statistics from storage
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// Placeholder response
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let ca_info = CaInfo {
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ca_certificate_pem: "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----".to_string(),
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subject: "CN=Capsula Root CA, O=Capsula PKI, C=US".to_string(),
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serial_number: "1".to_string(),
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not_before: chrono::Utc::now() - chrono::Duration::days(1),
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not_after: chrono::Utc::now() + chrono::Duration::days(3650),
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key_algorithm: "RSA".to_string(),
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key_size: Some(4096),
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created_at: chrono::Utc::now() - chrono::Duration::days(1),
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};
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let status = CaStatus {
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initialized: true,
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ca_info: Some(ca_info),
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certificates_issued: 0,
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active_certificates: 0,
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revoked_certificates: 0,
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};
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Ok(Json(status))
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}
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/// Get CA certificate
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#[utoipa::path(
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get,
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path = "/api/v1/ca/certificate",
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responses(
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(status = 200, description = "CA certificate retrieved successfully", body = CaInfo),
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(status = 404, description = "CA not initialized"),
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(status = 500, description = "Internal server error")
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),
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tag = "ca"
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)]
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pub async fn get_ca_certificate() -> Result<Json<CaInfo>, AppError> {
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tracing::info!("Getting CA certificate");
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// TODO: Implement CA certificate retrieval
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// Placeholder response
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let ca_info = CaInfo {
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ca_certificate_pem: "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----".to_string(),
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subject: "CN=Capsula Root CA, O=Capsula PKI, C=US".to_string(),
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serial_number: "1".to_string(),
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not_before: chrono::Utc::now() - chrono::Duration::days(1),
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not_after: chrono::Utc::now() + chrono::Duration::days(3650),
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key_algorithm: "RSA".to_string(),
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key_size: Some(4096),
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created_at: chrono::Utc::now() - chrono::Duration::days(1),
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};
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Ok(Json(ca_info))
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}
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/// Initialize Certificate Authority
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#[utoipa::path(
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post,
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path = "/api/v1/ca/init",
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request_body = CaInitRequest,
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responses(
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(status = 201, description = "CA initialized successfully", body = CaInfo),
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(status = 400, description = "Bad request or CA already initialized"),
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(status = 500, description = "Internal server error")
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),
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tag = "ca"
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)]
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pub async fn initialize_ca(
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Json(request): Json<CaInitRequest>,
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) -> Result<(StatusCode, Json<CaInfo>), AppError> {
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tracing::info!("Initializing CA with CN: {}", request.common_name);
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// TODO: Implement CA initialization
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// 1. Check if CA already exists
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// 2. Generate CA key pair
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// 3. Create self-signed CA certificate
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// 4. Store CA key and certificate securely
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// 5. Initialize certificate storage
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// Placeholder response
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let ca_info = CaInfo {
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ca_certificate_pem: "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----".to_string(),
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subject: format!("CN={}, O={}, C={}", request.common_name, request.organization, request.country),
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serial_number: "1".to_string(),
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not_before: chrono::Utc::now(),
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not_after: chrono::Utc::now() + chrono::Duration::days(request.validity_days as i64),
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key_algorithm: request.key_algorithm,
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key_size: request.key_size,
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created_at: chrono::Utc::now(),
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};
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Ok((StatusCode::CREATED, Json(ca_info)))
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}
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/// Health check endpoint
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#[utoipa::path(
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get,
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path = "/health",
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responses(
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(status = 200, description = "Service is healthy"),
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),
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tag = "health"
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)]
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pub async fn health_check() -> StatusCode {
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StatusCode::OK
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}
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pub fn create_router() -> OpenApiRouter {
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OpenApiRouter::new()
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.routes(routes!(get_ca_status))
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.routes(routes!(get_ca_certificate))
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.routes(routes!(initialize_ca))
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.routes(routes!(health_check))
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}

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