7b910a093b
* Handle ns lease and token renew/revoke via relative paths * s/usin/using/ * add token and lease lookup paths; set ctx only on non-nil ns Addtionally, use client token's ns for auth/token/lookup if no token is provided
446 lines
12 KiB
Go
446 lines
12 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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"fmt"
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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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uuid "github.com/hashicorp/go-uuid"
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"github.com/hashicorp/vault/helper/namespace"
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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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func buildLogicalRequest(core *vault.Core, w http.ResponseWriter, r *http.Request) (*logical.Request, int, error) {
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ns, err := namespace.FromContext(r.Context())
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if err != nil {
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return nil, http.StatusBadRequest, nil
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}
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path := ns.TrimmedPath(r.URL.Path[len("/v1/"):])
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var data map[string]interface{}
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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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queryVals := r.URL.Query()
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var list bool
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var err error
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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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if !strings.HasSuffix(path, "/") {
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path += "/"
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}
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}
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}
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if !list {
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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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case "POST", "PUT":
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op = logical.UpdateOperation
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// Parse the request if we can
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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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case "LIST":
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op = logical.ListOperation
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if !strings.HasSuffix(path, "/") {
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path += "/"
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}
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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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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, err := 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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if err != nil {
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if errwrap.Contains(err, logical.ErrPermissionDenied.Error()) {
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return nil, http.StatusForbidden, nil
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}
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return nil, http.StatusBadRequest, errwrap.Wrapf("error performing token check: {{err}}", err)
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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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err = parseMFAHeader(req)
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if err != nil {
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return nil, http.StatusBadRequest, errwrap.Wrapf("failed to parse X-Vault-MFA header: {{err}}", err)
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}
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err = requestPolicyOverride(r, req)
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if err != nil {
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return nil, http.StatusBadRequest, errwrap.Wrapf(fmt.Sprintf(`failed to parse %s header: {{err}}`, PolicyOverrideHeaderName), 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) http.Handler {
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return handleLogicalInternal(core, false)
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}
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func handleLogicalWithInjector(core *vault.Core) http.Handler {
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return handleLogicalInternal(core, true)
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}
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func handleLogicalInternal(core *vault.Core, injectDataIntoTopLevel bool) 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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// Always forward requests that are using a limited use count token
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if core.PerfStandby() && req.ClientTokenRemainingUses > 0 {
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forwardRequest(core, w, r)
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return
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}
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// req.Path will be relative by this point. The prefix check is first
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// to fail faster if we're not in this situation since it's a hot path
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switch {
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case strings.HasPrefix(req.Path, "sys/wrapping/"), strings.HasPrefix(req.Path, "auth/token/"):
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// Get the token ns info; if we match the paths below we want to
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// swap in the token context (but keep the relative path)
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if err != nil {
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core.Logger().Warn("error looking up just-set context", "error", err)
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respondError(w, http.StatusInternalServerError, err)
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return
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}
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te := req.TokenEntry()
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newCtx := r.Context()
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if te != nil {
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ns, err := vault.NamespaceByID(newCtx, te.NamespaceID, core)
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if err != nil {
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core.Logger().Warn("error looking up namespace from the token's namespace ID", "error", err)
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respondError(w, http.StatusInternalServerError, err)
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return
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}
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if ns != nil {
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newCtx = namespace.ContextWithNamespace(newCtx, ns)
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}
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}
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switch req.Path {
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case "sys/wrapping/lookup", "sys/wrapping/rewrap", "sys/wrapping/unwrap":
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r = r.WithContext(newCtx)
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if err := wrappingVerificationFunc(r.Context(), core, req); err != nil {
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if errwrap.Contains(err, logical.ErrPermissionDenied.Error()) {
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respondError(w, http.StatusForbidden, err)
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} else {
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respondError(w, http.StatusBadRequest, err)
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}
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return
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}
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// The -self paths have no meaning outside of the token NS, so
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// requests for these paths always go to the token NS
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case "auth/token/lookup-self", "auth/token/renew-self", "auth/token/revoke-self":
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r = r.WithContext(newCtx)
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// For the following operations, we can set the proper namespace context
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// using the token's embedded nsID if a relative path was provided. Since
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// this is done at the HTTP layer, the operation will still be gated by
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// ACLs.
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case "auth/token/lookup", "auth/token/renew", "auth/token/revoke", "auth/token/revoke-orphan":
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token, ok := req.Data["token"]
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// If the token is not present (e.g. a bad request), break out and let the backend
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// handle the error
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if !ok {
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// If this is a token lookup request and if the token is not
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// explicitly provided, it will use the client token so we simply set
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// the context to the client token's context.
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if req.Path == "auth/token/lookup" {
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r = r.WithContext(newCtx)
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}
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break
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}
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_, nsID := namespace.SplitIDFromString(token.(string))
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if nsID != "" {
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ns, err := vault.NamespaceByID(newCtx, nsID, core)
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if err != nil {
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core.Logger().Warn("error looking up namespace from the token's namespace ID", "error", err)
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respondError(w, http.StatusInternalServerError, err)
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return
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}
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if ns != nil {
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newCtx = namespace.ContextWithNamespace(newCtx, ns)
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r = r.WithContext(newCtx)
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}
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}
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}
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// The following relative sys/leases/ paths handles re-routing requests
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// to the proper namespace using the lease ID on applicable paths.
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case strings.HasPrefix(req.Path, "sys/leases/"):
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switch req.Path {
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// For the following operations, we can set the proper namespace context
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// using the lease's embedded nsID if a relative path was provided. Since
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// this is done at the HTTP layer, the operation will still be gated by
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// ACLs.
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case "sys/leases/lookup", "sys/leases/renew", "sys/leases/revoke", "sys/leases/revoke-force":
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leaseID, ok := req.Data["lease_id"]
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// If lease ID is not present, break out and let the backend handle the error
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if !ok {
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break
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}
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_, nsID := namespace.SplitIDFromString(leaseID.(string))
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if nsID != "" {
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newCtx := r.Context()
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ns, err := vault.NamespaceByID(newCtx, nsID, core)
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if err != nil {
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core.Logger().Warn("error looking up namespace from the lease's namespace ID", "error", err)
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respondError(w, http.StatusInternalServerError, err)
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return
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}
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if ns != nil {
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newCtx = namespace.ContextWithNamespace(newCtx, ns)
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r = r.WithContext(newCtx)
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}
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}
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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, needsForward := request(core, w, r, req)
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if needsForward {
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forwardRequest(core, w, r)
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return
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}
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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, resp, injectDataIntoTopLevel)
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})
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}
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func respondLogical(w http.ResponseWriter, r *http.Request, req *logical.Request, resp *logical.Response, injectDataIntoTopLevel bool) {
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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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goto WRITE_RESPONSE
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}
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switch bodyRaw.(type) {
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case string:
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// This is best effort. The value may already be base64-decoded so
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// if it doesn't work we just use as-is
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bodyDec, err := base64.StdEncoding.DecodeString(bodyRaw.(string))
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if err == nil {
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body = bodyDec
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} else {
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body = []byte(bodyRaw.(string))
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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_RESPONSE:
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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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