/
signer.go
81 lines (69 loc) · 2.06 KB
/
signer.go
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package hsdpsigner
import (
"fmt"
"net/http"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
"github.com/philips-software/go-hsdp-signer"
)
func init() {
caddy.RegisterModule(Middleware{})
httpcaddyfile.RegisterHandlerDirective("hsdpsigner", parseCaddyfile)
}
type Middleware struct {
SharedKey string `json:"shared_key,omitempty"`
SecretKey string `json:"secret_key,omitempty"`
s *signer.Signer
}
// CaddyModule returns the Caddy module information.
func (Middleware) CaddyModule() caddy.ModuleInfo {
return caddy.ModuleInfo{
ID: "http.handlers.hsdpsigner",
New: func() caddy.Module { return new(Middleware) },
}
}
// Provision implements caddy.Provisioner.
func (m *Middleware) Provision(ctx caddy.Context) error {
var err error
m.s, err = signer.New(m.SharedKey, m.SecretKey, signer.SignMethod(), signer.SignParam())
return err
}
// Validate implements caddy.Validator.
func (m *Middleware) Validate() error {
if m.s == nil {
return fmt.Errorf("no signer")
}
return nil
}
// ServeHTTP implements caddyhttp.MiddlewareHandler.
func (m Middleware) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
err := m.s.SignRequest(r)
if err != nil {
return err
}
return next.ServeHTTP(w, r)
}
// UnmarshalCaddyfile implements caddyfile.Unmarshaler.
func (m *Middleware) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
for d.Next() {
if !d.Args(&m.SharedKey, &m.SecretKey) {
return d.ArgErr()
}
}
return nil
}
// parseCaddyfile unmarshals tokens from h into a new Middleware.
func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
var m Middleware
err := m.UnmarshalCaddyfile(h.Dispenser)
return m, err
}
// Interface guards
var (
_ caddy.Provisioner = (*Middleware)(nil)
_ caddy.Validator = (*Middleware)(nil)
_ caddyhttp.MiddlewareHandler = (*Middleware)(nil)
_ caddyfile.Unmarshaler = (*Middleware)(nil)
)