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godoxy/agent/pkg/certs/README.md
2026-01-09 10:13:32 +08:00

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# agent/pkg/certs
Certificate management package for creating and extracting certificate archives.
## Overview
This package provides utilities for packaging SSL certificates into ZIP archives and extracting them. It is used by the GoDoxy Agent to distribute certificates to clients in a convenient format.
## Architecture
```mermaid
graph LR
A[Raw Certs] --> B[ZipCert]
B --> C[ZIP Archive]
C --> D[ca.pem]
C --> E[cert.pem]
C --> F[key.pem]
G[ZIP Archive] --> H[ExtractCert]
H --> I[ca, crt, key]
```
## Public Functions
### ZipCert
```go
func ZipCert(ca, crt, key []byte) ([]byte, error)
```
Creates a ZIP archive containing three PEM files:
- `ca.pem` - CA certificate
- `cert.pem` - Server/client certificate
- `key.pem` - Private key
**Parameters:**
- `ca` - CA certificate in PEM format
- `crt` - Certificate in PEM format
- `key` - Private key in PEM format
**Returns:**
- ZIP archive bytes
- Error if packing fails
### ExtractCert
```go
func ExtractCert(data []byte) (ca, crt, key []byte, err error)
```
Extracts certificates from a ZIP archive created by `ZipCert`.
**Parameters:**
- `data` - ZIP archive bytes
**Returns:**
- `ca` - CA certificate bytes
- `crt` - Certificate bytes
- `key` - Private key bytes
- Error if extraction fails
### AgentCertsFilepath
```go
func AgentCertsFilepath(host string) (filepathOut string, ok bool)
```
Generates the file path for storing agent certificates.
**Parameters:**
- `host` - Agent hostname
**Returns:**
- Full file path within `certs/` directory
- `false` if host is invalid (contains path separators or special characters)
### isValidAgentHost
```go
func isValidAgentHost(host string) bool
```
Validates that a host string is safe for use in file paths.
## Constants
```go
const AgentCertsBasePath = "certs"
```
Base directory for storing certificate archives.
## File Format
The ZIP archive uses `zip.Store` compression (no compression) for fast creation and extraction. Each file is stored with its standard name (`ca.pem`, `cert.pem`, `key.pem`).