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114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
// Package ocsp implements the HTTP handler for the ocsp commands.
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package ocsp
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import (
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"crypto"
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"net/http"
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"encoding/base64"
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"encoding/json"
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"io/ioutil"
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"time"
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"github.com/cloudflare/cfssl/api"
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"github.com/cloudflare/cfssl/errors"
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"github.com/cloudflare/cfssl/helpers"
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"github.com/cloudflare/cfssl/log"
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"github.com/cloudflare/cfssl/ocsp"
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)
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// A Handler accepts requests with a certficate parameter
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// (which should be PEM-encoded) and returns a signed ocsp
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// response.
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type Handler struct {
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signer ocsp.Signer
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}
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// NewHandler returns a new http.Handler that handles a ocspsign request.
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func NewHandler(s ocsp.Signer) http.Handler {
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return &api.HTTPHandler{
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Handler: &Handler{
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signer: s,
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},
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Methods: []string{"POST"},
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}
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}
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// This type is meant to be unmarshalled from JSON
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type jsonSignRequest struct {
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Certificate string `json:"certificate"`
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Status string `json:"status"`
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Reason int `json:"reason,omitempty"`
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RevokedAt string `json:"revoked_at,omitempty"`
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IssuerHash string `json:"issuer_hash,omitempty"`
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}
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var nameToHash = map[string]crypto.Hash{
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"MD5": crypto.MD5,
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"SHA1": crypto.SHA1,
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"SHA256": crypto.SHA256,
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"SHA384": crypto.SHA384,
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"SHA512": crypto.SHA512,
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}
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// Handle responds to requests for a ocsp signature. It creates and signs
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// a ocsp response for the provided certificate and status. If the status
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// is revoked then it also adds reason and revoked_at. The response is
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// base64 encoded.
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func (h *Handler) Handle(w http.ResponseWriter, r *http.Request) error {
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body, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return err
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}
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r.Body.Close()
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// Default the status to good so it matches the cli
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req := &jsonSignRequest{
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Status: "good",
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}
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err = json.Unmarshal(body, req)
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if err != nil {
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return errors.NewBadRequestString("Unable to parse sign request")
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}
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cert, err := helpers.ParseCertificatePEM([]byte(req.Certificate))
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if err != nil {
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log.Error("Error from ParseCertificatePEM", err)
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return errors.NewBadRequestString("Malformed certificate")
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}
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signReq := ocsp.SignRequest{
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Certificate: cert,
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Status: req.Status,
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}
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// We need to convert the time from being a string to a time.Time
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if req.Status == "revoked" {
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signReq.Reason = req.Reason
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// "now" is accepted and the default on the cli so default that here
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if req.RevokedAt == "" || req.RevokedAt == "now" {
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signReq.RevokedAt = time.Now()
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} else {
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signReq.RevokedAt, err = time.Parse("2006-01-02", req.RevokedAt)
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if err != nil {
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return errors.NewBadRequestString("Malformed revocation time")
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}
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}
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}
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if req.IssuerHash != "" {
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issuerHash, ok := nameToHash[req.IssuerHash]
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if !ok {
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return errors.NewBadRequestString("Unsupported hash algorithm in request")
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}
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signReq.IssuerHash = issuerHash
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}
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resp, err := h.signer.Sign(signReq)
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if err != nil {
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return err
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}
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b64Resp := base64.StdEncoding.EncodeToString(resp)
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result := map[string]string{"ocspResponse": b64Resp}
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return api.SendResponse(w, result)
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}
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