316 lines
7.4 KiB
Go
316 lines
7.4 KiB
Go
package http
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import (
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"encoding/base64"
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"encoding/json"
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"io"
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"net"
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"net/http"
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"strconv"
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"strings"
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"time"
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"github.com/hashicorp/errwrap"
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"github.com/hashicorp/go-uuid"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/vault"
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)
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type PrepareRequestFunc func(*vault.Core, *logical.Request) error
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func buildLogicalRequest(core *vault.Core, w http.ResponseWriter, r *http.Request) (*logical.Request, int, error) {
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// Determine the path...
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if !strings.HasPrefix(r.URL.Path, "/v1/") {
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return nil, http.StatusNotFound, nil
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}
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path := r.URL.Path[len("/v1/"):]
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if path == "" {
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return nil, http.StatusNotFound, nil
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}
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// Determine the operation
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var op logical.Operation
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switch r.Method {
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case "DELETE":
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op = logical.DeleteOperation
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case "GET":
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op = logical.ReadOperation
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// Need to call ParseForm to get query params loaded
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queryVals := r.URL.Query()
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listStr := queryVals.Get("list")
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if listStr != "" {
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list, err := strconv.ParseBool(listStr)
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if err != nil {
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return nil, http.StatusBadRequest, nil
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}
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if list {
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op = logical.ListOperation
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}
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}
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case "POST", "PUT":
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op = logical.UpdateOperation
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case "LIST":
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op = logical.ListOperation
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case "OPTIONS":
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default:
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return nil, http.StatusMethodNotAllowed, nil
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}
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if op == logical.ListOperation {
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if !strings.HasSuffix(path, "/") {
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path += "/"
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}
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}
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// Parse the request if we can
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var data map[string]interface{}
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if op == logical.UpdateOperation {
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err := parseRequest(r, w, &data)
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if err == io.EOF {
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data = nil
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err = nil
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}
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if err != nil {
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return nil, http.StatusBadRequest, err
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}
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}
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// If we are a read operation, try and parse any parameters
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if op == logical.ReadOperation {
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getData := map[string]interface{}{}
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for k, v := range r.URL.Query() {
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// Skip the help key as this is a reserved parameter
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if k == "help" {
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continue
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}
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switch {
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case len(v) == 0:
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case len(v) == 1:
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getData[k] = v[0]
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default:
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getData[k] = v
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}
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}
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if len(getData) > 0 {
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data = getData
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}
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}
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var err error
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request_id, err := uuid.GenerateUUID()
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if err != nil {
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return nil, http.StatusBadRequest, errwrap.Wrapf("failed to generate identifier for the request: {{err}}", err)
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}
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req := requestAuth(core, r, &logical.Request{
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ID: request_id,
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Operation: op,
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Path: path,
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Data: data,
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Connection: getConnection(r),
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Headers: r.Header,
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})
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req, err = requestWrapInfo(r, req)
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if err != nil {
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return nil, http.StatusBadRequest, errwrap.Wrapf("error parsing X-Vault-Wrap-TTL header: {{err}}", err)
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}
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return req, 0, nil
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}
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func handleLogical(core *vault.Core, injectDataIntoTopLevel bool, prepareRequestCallback PrepareRequestFunc) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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req, statusCode, err := buildLogicalRequest(core, w, r)
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if err != nil || statusCode != 0 {
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respondError(w, statusCode, err)
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return
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}
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// Certain endpoints may require changes to the request object. They
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// will have a callback registered to do the needed operations, so
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// invoke it before proceeding.
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if prepareRequestCallback != nil {
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if err := prepareRequestCallback(core, req); err != nil {
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respondError(w, http.StatusBadRequest, err)
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return
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}
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}
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// Make the internal request. We attach the connection info
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// as well in case this is an authentication request that requires
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// it. Vault core handles stripping this if we need to. This also
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// handles all error cases; if we hit respondLogical, the request is a
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// success.
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resp, ok := request(core, w, r, req)
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if !ok {
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return
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}
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// Build the proper response
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respondLogical(w, r, req, injectDataIntoTopLevel, resp)
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})
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}
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func respondLogical(w http.ResponseWriter, r *http.Request, req *logical.Request, injectDataIntoTopLevel bool, resp *logical.Response) {
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var httpResp *logical.HTTPResponse
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var ret interface{}
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if resp != nil {
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if resp.Redirect != "" {
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// If we have a redirect, redirect! We use a 307 code
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// because we don't actually know if its permanent.
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http.Redirect(w, r, resp.Redirect, 307)
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return
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}
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// Check if this is a raw response
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if _, ok := resp.Data[logical.HTTPStatusCode]; ok {
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respondRaw(w, r, resp)
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return
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}
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if resp.WrapInfo != nil && resp.WrapInfo.Token != "" {
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httpResp = &logical.HTTPResponse{
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WrapInfo: &logical.HTTPWrapInfo{
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Token: resp.WrapInfo.Token,
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Accessor: resp.WrapInfo.Accessor,
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TTL: int(resp.WrapInfo.TTL.Seconds()),
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CreationTime: resp.WrapInfo.CreationTime.Format(time.RFC3339Nano),
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CreationPath: resp.WrapInfo.CreationPath,
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WrappedAccessor: resp.WrapInfo.WrappedAccessor,
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},
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}
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} else {
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httpResp = logical.LogicalResponseToHTTPResponse(resp)
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httpResp.RequestID = req.ID
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}
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ret = httpResp
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if injectDataIntoTopLevel {
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injector := logical.HTTPSysInjector{
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Response: httpResp,
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}
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ret = injector
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}
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}
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// Respond
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respondOk(w, ret)
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return
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}
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// respondRaw is used when the response is using HTTPContentType and HTTPRawBody
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// to change the default response handling. This is only used for specific things like
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// returning the CRL information on the PKI backends.
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func respondRaw(w http.ResponseWriter, r *http.Request, resp *logical.Response) {
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retErr := func(w http.ResponseWriter, err string) {
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w.Header().Set("X-Vault-Raw-Error", err)
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w.WriteHeader(http.StatusInternalServerError)
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w.Write(nil)
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}
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// Ensure this is never a secret or auth response
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if resp.Secret != nil || resp.Auth != nil {
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retErr(w, "raw responses cannot contain secrets or auth")
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return
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}
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// Get the status code
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statusRaw, ok := resp.Data[logical.HTTPStatusCode]
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if !ok {
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retErr(w, "no status code given")
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return
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}
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var status int
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switch statusRaw.(type) {
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case int:
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status = statusRaw.(int)
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case float64:
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status = int(statusRaw.(float64))
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case json.Number:
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s64, err := statusRaw.(json.Number).Float64()
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if err != nil {
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retErr(w, "cannot decode status code")
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return
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}
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status = int(s64)
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default:
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retErr(w, "cannot decode status code")
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return
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}
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nonEmpty := status != http.StatusNoContent
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var contentType string
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var body []byte
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// Get the content type header; don't require it if the body is empty
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contentTypeRaw, ok := resp.Data[logical.HTTPContentType]
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if !ok && nonEmpty {
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retErr(w, "no content type given")
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return
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}
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if ok {
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contentType, ok = contentTypeRaw.(string)
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if !ok {
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retErr(w, "cannot decode content type")
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return
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}
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}
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if nonEmpty {
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// Get the body
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bodyRaw, ok := resp.Data[logical.HTTPRawBody]
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if !ok {
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retErr(w, "no body given")
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return
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}
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switch bodyRaw.(type) {
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case string:
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var err error
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body, err = base64.StdEncoding.DecodeString(bodyRaw.(string))
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if err != nil {
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retErr(w, "cannot decode body")
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return
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}
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case []byte:
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body = bodyRaw.([]byte)
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default:
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retErr(w, "cannot decode body")
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return
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}
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}
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// Write the response
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if contentType != "" {
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w.Header().Set("Content-Type", contentType)
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}
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w.WriteHeader(status)
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w.Write(body)
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}
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// getConnection is used to format the connection information for
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// attaching to a logical request
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func getConnection(r *http.Request) (connection *logical.Connection) {
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var remoteAddr string
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remoteAddr, _, err := net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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remoteAddr = ""
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}
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connection = &logical.Connection{
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RemoteAddr: remoteAddr,
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ConnState: r.TLS,
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}
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return
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}
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