New version 0.5.0 (#18)

Author: DorianCoding

API.md

@@ -0,0 +1,184 @@
+# Certificate Management API for OCSP Server
+
+This API allows you to add, revoke, and query certificates in the database used by the OCSP server.
+
+## Configuration
+
+To enable the API, add the following parameters to your `config.toml` file:
+
+```toml
+# API Configuration
+enable_api = true # Enable the API
+api_keys = ["your-secure-api-key"] # List of valid API keys
+```
+
+## Generating Secure API Keys
+
+API keys should be random, hard to guess, and unique. Here are different methods to generate secure API keys:
+
+### Using OpenSSL
+
+The simplest way to generate a secure API key is using OpenSSL:
+
+```bash
+# Generate a 32-byte random hexadecimal string
+openssl rand -hex 32
+```
+
+Example output: `a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0u1v2w3x4y5z6`
+
+After generating an API key, add it to the `api_keys` array in your `config.toml` file.
+
+## Authentication
+
+All API requests must include an `X-API-Key` header with a valid API key.
+
+## Finding Certificate Numbers
+
+To use this API, you need the certificate number in the correct format (with `0x` prefix and lowercase hexadecimal digits). You can extract a certificate's serial number and format it properly using this command:
+
+```bash
+openssl x509 -in your_certificate.pem -serial -noout | awk -F= '{print "0x" tolower($2)}'
+```
+
+This will output the certificate number in the exact format required by the API endpoints (e.g., `0x3b6ea97e1bf7699397e2109846e4f356be982542`).
+
+## Endpoints
+
+### Health Check
+```
+GET /api/health
+```
+Returns "OK" if the service is available.
+
+### Add a Certificate
+```
+POST /api/certificates
+```
+
+**Request Body:**
+```json
+{
+  "cert_num": "0x123456789ABCDEF"
+}
+```
+
+**Example Response:**
+```json
+{
+  "cert_num": "0x123456789ABCDEF",
+  "status": "Valid",
+  "message": "Certificate added successfully"
+}
+```
+
+### Revoke a Certificate
+```
+POST /api/certificates/revoke
+```
+
+**Request Body:**
+```json
+{
+  "cert_num": "0x123456789ABCDEF",
+  "reason": "key_compromise",
+  "revocation_time": "2025-03-18T12:00:00" // Optional, uses the current time if not provided
+}
+```
+
+Valid revocation reasons are:
+- `unspecified`
+- `key_compromise`
+- `ca_compromise`
+- `affiliation_changed`
+- `superseded`
+- `cessation_of_operation`
+- `certificate_hold`
+- `privilege_withdrawn`
+- `aa_compromise`
+
+**Example Response:**
+```json
+{
+  "cert_num": "0x123456789ABCDEF",
+  "status": "Revoked",
+  "message": "Certificate revoked successfully"
+}
+```
+
+### Get a Certificate's Status
+```
+GET /api/certificates/{cert_num}
+```
+
+**Example Response:**
+```json
+{
+  "cert_num": "0x123456789ABCDEF",
+  "status": "Valid",
+  "message": "Certificate status retrieved: Valid"
+}
+```
+
+### List All Certificates
+```
+GET /api/certificates
+```
+
+Optional parameters:
+- `status`: Filter by status (`Valid`, `Revoked`, or `all`)
+  - If no `status` parameter is provided or `status=all` is used, all certificates will be returned
+  - Use `status=Valid` to return only valid certificates
+  - Use `status=Revoked` to return only revoked certificates
+
+**Example Response:**
+```json
+[
+  {
+    "cert_num": "0x123456789ABCDEF",
+    "status": "Valid",
+    "message": ""
+  },
+  {
+    "cert_num": "0x987654321FEDCBA",
+    "status": "Revoked",
+    "message": ""
+  }
+]
+```
+
+## Usage Examples with cURL
+
+### Add a Certificate
+```bash
+curl -X POST http://localhost:9000/api/certificates \
+  -H "Content-Type: application/json" \
+  -H "X-API-Key: your-api-key" \
+  -d '{"cert_num": "0x123456789ABCDEF"}'
+```
+
+### Revoke a Certificate
+```bash
+curl -X POST http://localhost:9000/api/certificates/revoke \
+  -H "Content-Type: application/json" \
+  -H "X-API-Key: your-api-key" \
+  -d '{"cert_num": "0x123456789ABCDEF", "reason": "key_compromise"}'
+```
+
+### Get a Certificate's Status
+```bash
+curl -X GET http://localhost:9000/api/certificates/0x123456789ABCDEF \
+  -H "X-API-Key: your-api-key"
+```
+
+### List All Valid Certificates
+```bash
+curl -X GET "http://localhost:9000/api/certificates?status=Valid" \
+  -H "X-API-Key: your-api-key"
+```
+
+### List All Certificates (Explicitly)
+```bash
+curl -X GET "http://localhost:9000/api/certificates?status=all" \
+  -H "X-API-Key: your-api-key"
+```