631 lines
21 KiB
Go
631 lines
21 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package pki
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import (
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"context"
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"crypto"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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"errors"
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"fmt"
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"net/http"
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"reflect"
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"strings"
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"time"
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"golang.org/x/crypto/ed25519"
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"github.com/hashicorp/vault/sdk/helper/certutil"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/helper/errutil"
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"github.com/hashicorp/vault/sdk/logical"
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)
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func pathGenerateRoot(b *backend) *framework.Path {
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return buildPathGenerateRoot(b, "root/generate/"+framework.GenericNameRegex("exported"))
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}
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func pathDeleteRoot(b *backend) *framework.Path {
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ret := &framework.Path{
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Pattern: "root",
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Operations: map[logical.Operation]framework.OperationHandler{
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logical.DeleteOperation: &framework.PathOperation{
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Callback: b.pathCADeleteRoot,
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Responses: map[int][]framework.Response{
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http.StatusOK: {{
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Description: "OK",
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}},
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},
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// Read more about why these flags are set in backend.go
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ForwardPerformanceStandby: true,
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ForwardPerformanceSecondary: true,
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},
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},
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HelpSynopsis: pathDeleteRootHelpSyn,
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HelpDescription: pathDeleteRootHelpDesc,
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}
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return ret
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}
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func (b *backend) pathCADeleteRoot(ctx context.Context, req *logical.Request, _ *framework.FieldData) (*logical.Response, error) {
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// Since we're planning on updating issuers here, grab the lock so we've
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// got a consistent view.
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b.issuersLock.Lock()
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defer b.issuersLock.Unlock()
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sc := b.makeStorageContext(ctx, req.Storage)
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if !b.useLegacyBundleCaStorage() {
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issuers, err := sc.listIssuers()
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if err != nil {
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return nil, err
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}
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keys, err := sc.listKeys()
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if err != nil {
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return nil, err
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}
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// Delete all issuers and keys. Ignore deleting the default since we're
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// explicitly deleting everything.
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for _, issuer := range issuers {
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if _, err = sc.deleteIssuer(issuer); err != nil {
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return nil, err
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}
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}
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for _, key := range keys {
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if _, err = sc.deleteKey(key); err != nil {
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return nil, err
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}
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}
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}
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// Delete legacy CA bundle and its backup, if any.
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if err := req.Storage.Delete(ctx, legacyCertBundlePath); err != nil {
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return nil, err
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}
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if err := req.Storage.Delete(ctx, legacyCertBundleBackupPath); err != nil {
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return nil, err
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}
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// Delete legacy CRL bundle.
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if err := req.Storage.Delete(ctx, legacyCRLPath); err != nil {
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return nil, err
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}
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// Return a warning about preferring to delete issuers and keys
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// explicitly versus deleting everything.
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resp := &logical.Response{}
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resp.AddWarning("DELETE /root deletes all keys and issuers; prefer the new DELETE /key/:key_ref and DELETE /issuer/:issuer_ref for finer granularity, unless removal of all keys and issuers is desired.")
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return resp, nil
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}
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func (b *backend) pathCAGenerateRoot(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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// Since we're planning on updating issuers here, grab the lock so we've
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// got a consistent view.
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b.issuersLock.Lock()
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defer b.issuersLock.Unlock()
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var err error
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if b.useLegacyBundleCaStorage() {
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return logical.ErrorResponse("Can not create root CA until migration has completed"), nil
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}
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sc := b.makeStorageContext(ctx, req.Storage)
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exported, format, role, errorResp := getGenerationParams(sc, data)
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if errorResp != nil {
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return errorResp, nil
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}
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maxPathLengthIface, ok := data.GetOk("max_path_length")
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if ok {
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maxPathLength := maxPathLengthIface.(int)
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role.MaxPathLength = &maxPathLength
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}
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issuerName, err := getIssuerName(sc, data)
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if err != nil {
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return logical.ErrorResponse(err.Error()), nil
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}
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// Handle the aliased path specifying the new issuer name as "next", but
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// only do it if its not in use.
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if strings.HasPrefix(req.Path, "root/rotate/") && len(issuerName) == 0 {
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// err is nil when the issuer name is in use.
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_, err = sc.resolveIssuerReference("next")
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if err != nil {
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issuerName = "next"
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}
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}
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keyName, err := getKeyName(sc, data)
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if err != nil {
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return logical.ErrorResponse(err.Error()), nil
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}
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input := &inputBundle{
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req: req,
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apiData: data,
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role: role,
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}
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parsedBundle, warnings, err := generateCert(sc, input, nil, true, b.Backend.GetRandomReader())
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if err != nil {
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switch err.(type) {
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case errutil.UserError:
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return logical.ErrorResponse(err.Error()), nil
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default:
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return nil, err
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}
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}
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cb, err := parsedBundle.ToCertBundle()
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if err != nil {
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return nil, fmt.Errorf("error converting raw cert bundle to cert bundle: %w", err)
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}
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resp := &logical.Response{
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Data: map[string]interface{}{
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"expiration": int64(parsedBundle.Certificate.NotAfter.Unix()),
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"serial_number": cb.SerialNumber,
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},
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}
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if len(parsedBundle.Certificate.RawSubject) <= 2 {
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// Strictly a subject is a SEQUENCE of SETs of SEQUENCES.
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//
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// The outer SEQUENCE is preserved, having byte value 30 00.
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//
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// Because of the tag and the length encoding each taking up
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// at least one byte, it is impossible to have a non-empty
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// subject in two or fewer bytes. We're also not here to validate
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// our certificate's ASN.1 content, so let's just assume it holds
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// and move on.
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resp.AddWarning("This issuer certificate was generated without a Subject; this makes it likely that issuing leaf certs with this certificate will cause TLS validation libraries to reject this certificate.")
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}
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if len(parsedBundle.Certificate.OCSPServer) == 0 && len(parsedBundle.Certificate.IssuingCertificateURL) == 0 && len(parsedBundle.Certificate.CRLDistributionPoints) == 0 {
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// If the operator hasn't configured any of the URLs prior to
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// generating this issuer, we should add a warning to the response,
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// informing them they might want to do so prior to issuing leaves.
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resp.AddWarning("This mount hasn't configured any authority information access (AIA) fields; this may make it harder for systems to find missing certificates in the chain or to validate revocation status of certificates. Consider updating /config/urls or the newly generated issuer with this information.")
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}
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switch format {
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case "pem":
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resp.Data["certificate"] = cb.Certificate
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resp.Data["issuing_ca"] = cb.Certificate
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if exported {
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resp.Data["private_key"] = cb.PrivateKey
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resp.Data["private_key_type"] = cb.PrivateKeyType
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}
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case "pem_bundle":
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resp.Data["issuing_ca"] = cb.Certificate
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if exported {
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resp.Data["private_key"] = cb.PrivateKey
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resp.Data["private_key_type"] = cb.PrivateKeyType
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resp.Data["certificate"] = fmt.Sprintf("%s\n%s", cb.PrivateKey, cb.Certificate)
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} else {
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resp.Data["certificate"] = cb.Certificate
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}
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case "der":
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resp.Data["certificate"] = base64.StdEncoding.EncodeToString(parsedBundle.CertificateBytes)
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resp.Data["issuing_ca"] = base64.StdEncoding.EncodeToString(parsedBundle.CertificateBytes)
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if exported {
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resp.Data["private_key"] = base64.StdEncoding.EncodeToString(parsedBundle.PrivateKeyBytes)
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resp.Data["private_key_type"] = cb.PrivateKeyType
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}
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default:
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return nil, fmt.Errorf("unsupported format argument: %s", format)
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}
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if data.Get("private_key_format").(string) == "pkcs8" {
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err = convertRespToPKCS8(resp)
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if err != nil {
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return nil, err
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}
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}
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// Store it as the CA bundle
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myIssuer, myKey, err := sc.writeCaBundle(cb, issuerName, keyName)
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if err != nil {
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return nil, err
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}
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resp.Data["issuer_id"] = myIssuer.ID
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resp.Data["issuer_name"] = myIssuer.Name
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resp.Data["key_id"] = myKey.ID
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resp.Data["key_name"] = myKey.Name
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// The one time that it is safe (and good) to copy the
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// SignatureAlgorithm field off the certificate (for the purposes of
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// detecting PSS support) is when we've freshly generated it AND it
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// is a root (exactly this endpoint).
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//
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// For intermediates, this doesn't hold (not this endpoint) as that
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// reflects the parent key's preferences. For imports, this doesn't
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// hold as the old system might've allowed other signature types that
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// the new system (whether Vault or a managed key) doesn't.
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//
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// Previously we did this conditionally on whether or not PSS was in
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// use. This is insufficient as some cloud KMS providers (namely, GCP)
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// restrict the key to a single signature algorithm! So e.g., a RSA 3072
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// key MUST use SHA-384 as the hash algorithm. Thus we pull in the
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// RevocationSigAlg unconditionally on roots now.
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myIssuer.RevocationSigAlg = parsedBundle.Certificate.SignatureAlgorithm
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if err := sc.writeIssuer(myIssuer); err != nil {
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return nil, fmt.Errorf("unable to store PSS-updated issuer: %w", err)
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}
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// Also store it as just the certificate identified by serial number, so it
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// can be revoked
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key := "certs/" + normalizeSerial(cb.SerialNumber)
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certsCounted := b.certsCounted.Load()
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err = req.Storage.Put(ctx, &logical.StorageEntry{
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Key: key,
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Value: parsedBundle.CertificateBytes,
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})
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if err != nil {
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return nil, fmt.Errorf("unable to store certificate locally: %w", err)
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}
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b.ifCountEnabledIncrementTotalCertificatesCount(certsCounted, key)
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// Build a fresh CRL
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err = b.crlBuilder.rebuild(sc, true)
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if err != nil {
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return nil, err
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}
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if parsedBundle.Certificate.MaxPathLen == 0 {
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resp.AddWarning("Max path length of the generated certificate is zero. This certificate cannot be used to issue intermediate CA certificates.")
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}
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// Check whether we need to update our default issuer configuration.
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config, err := sc.getIssuersConfig()
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if err != nil {
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resp.AddWarning("Unable to fetch default issuers configuration to update default issuer if necessary: " + err.Error())
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} else if config.DefaultFollowsLatestIssuer {
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if err := sc.updateDefaultIssuerId(myIssuer.ID); err != nil {
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resp.AddWarning("Unable to update this new root as the default issuer: " + err.Error())
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}
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}
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resp = addWarnings(resp, warnings)
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return resp, nil
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}
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func (b *backend) pathIssuerSignIntermediate(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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var err error
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issuerName := getIssuerRef(data)
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if len(issuerName) == 0 {
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return logical.ErrorResponse("missing issuer reference"), nil
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}
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format := getFormat(data)
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if format == "" {
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return logical.ErrorResponse(
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`The "format" path parameter must be "pem" or "der"`,
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), nil
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}
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role := &roleEntry{
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OU: data.Get("ou").([]string),
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Organization: data.Get("organization").([]string),
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Country: data.Get("country").([]string),
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Locality: data.Get("locality").([]string),
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Province: data.Get("province").([]string),
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StreetAddress: data.Get("street_address").([]string),
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PostalCode: data.Get("postal_code").([]string),
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TTL: time.Duration(data.Get("ttl").(int)) * time.Second,
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AllowLocalhost: true,
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AllowAnyName: true,
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AllowIPSANs: true,
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AllowWildcardCertificates: new(bool),
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EnforceHostnames: false,
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KeyType: "any",
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SignatureBits: data.Get("signature_bits").(int),
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UsePSS: data.Get("use_pss").(bool),
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AllowedOtherSANs: []string{"*"},
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AllowedSerialNumbers: []string{"*"},
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AllowedURISANs: []string{"*"},
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NotAfter: data.Get("not_after").(string),
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NotBeforeDuration: time.Duration(data.Get("not_before_duration").(int)) * time.Second,
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CNValidations: []string{"disabled"},
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}
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*role.AllowWildcardCertificates = true
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if cn := data.Get("common_name").(string); len(cn) == 0 {
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role.UseCSRCommonName = true
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}
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var caErr error
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sc := b.makeStorageContext(ctx, req.Storage)
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signingBundle, caErr := sc.fetchCAInfo(issuerName, IssuanceUsage)
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if caErr != nil {
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switch caErr.(type) {
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case errutil.UserError:
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return nil, errutil.UserError{Err: fmt.Sprintf(
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"could not fetch the CA certificate (was one set?): %s", caErr)}
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default:
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return nil, errutil.InternalError{Err: fmt.Sprintf(
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"error fetching CA certificate: %s", caErr)}
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}
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}
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// Since we are signing an intermediate, we explicitly want to override
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// the leaf NotAfterBehavior to permit issuing intermediates longer than
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// the life of this issuer.
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signingBundle.LeafNotAfterBehavior = certutil.PermitNotAfterBehavior
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useCSRValues := data.Get("use_csr_values").(bool)
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maxPathLengthIface, ok := data.GetOk("max_path_length")
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if ok {
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maxPathLength := maxPathLengthIface.(int)
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role.MaxPathLength = &maxPathLength
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}
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input := &inputBundle{
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req: req,
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apiData: data,
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role: role,
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}
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parsedBundle, warnings, err := signCert(b, input, signingBundle, true, useCSRValues)
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if err != nil {
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switch err.(type) {
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case errutil.UserError:
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return logical.ErrorResponse(err.Error()), nil
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default:
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return nil, errutil.InternalError{Err: fmt.Sprintf(
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"error signing cert: %s", err)}
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}
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}
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if err := parsedBundle.Verify(); err != nil {
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return nil, fmt.Errorf("verification of parsed bundle failed: %w", err)
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}
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signingCB, err := signingBundle.ToCertBundle()
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if err != nil {
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return nil, fmt.Errorf("error converting raw signing bundle to cert bundle: %w", err)
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}
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cb, err := parsedBundle.ToCertBundle()
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if err != nil {
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return nil, fmt.Errorf("error converting raw cert bundle to cert bundle: %w", err)
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}
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resp := &logical.Response{
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Data: map[string]interface{}{
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"expiration": int64(parsedBundle.Certificate.NotAfter.Unix()),
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"serial_number": cb.SerialNumber,
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},
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}
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|
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if signingBundle.Certificate.NotAfter.Before(parsedBundle.Certificate.NotAfter) {
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resp.AddWarning("The expiration time for the signed certificate is after the CA's expiration time. If the new certificate is not treated as a root, validation paths with the certificate past the issuing CA's expiration time will fail.")
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}
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|
|
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if len(parsedBundle.Certificate.RawSubject) <= 2 {
|
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// Strictly a subject is a SEQUENCE of SETs of SEQUENCES.
|
|
//
|
|
// The outer SEQUENCE is preserved, having byte value 30 00.
|
|
//
|
|
// Because of the tag and the length encoding each taking up
|
|
// at least one byte, it is impossible to have a non-empty
|
|
// subject in two or fewer bytes. We're also not here to validate
|
|
// our certificate's ASN.1 content, so let's just assume it holds
|
|
// and move on.
|
|
resp.AddWarning("This issuer certificate was generated without a Subject; this makes it likely that issuing leaf certs with this certificate will cause TLS validation libraries to reject this certificate.")
|
|
}
|
|
|
|
if len(parsedBundle.Certificate.OCSPServer) == 0 && len(parsedBundle.Certificate.IssuingCertificateURL) == 0 && len(parsedBundle.Certificate.CRLDistributionPoints) == 0 {
|
|
// If the operator hasn't configured any of the URLs prior to
|
|
// generating this issuer, we should add a warning to the response,
|
|
// informing them they might want to do so prior to issuing leaves.
|
|
resp.AddWarning("This mount hasn't configured any authority information access (AIA) fields; this may make it harder for systems to find missing certificates in the chain or to validate revocation status of certificates. Consider updating /config/urls or the newly generated issuer with this information.")
|
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}
|
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|
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caChain := append([]string{cb.Certificate}, cb.CAChain...)
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|
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switch format {
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case "pem":
|
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resp.Data["certificate"] = cb.Certificate
|
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resp.Data["issuing_ca"] = signingCB.Certificate
|
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resp.Data["ca_chain"] = caChain
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|
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case "pem_bundle":
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resp.Data["certificate"] = cb.ToPEMBundle()
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resp.Data["issuing_ca"] = signingCB.Certificate
|
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resp.Data["ca_chain"] = caChain
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|
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case "der":
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resp.Data["certificate"] = base64.StdEncoding.EncodeToString(parsedBundle.CertificateBytes)
|
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resp.Data["issuing_ca"] = base64.StdEncoding.EncodeToString(signingBundle.CertificateBytes)
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|
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var derCaChain []string
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derCaChain = append(derCaChain, base64.StdEncoding.EncodeToString(parsedBundle.CertificateBytes))
|
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for _, caCert := range parsedBundle.CAChain {
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derCaChain = append(derCaChain, base64.StdEncoding.EncodeToString(caCert.Bytes))
|
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}
|
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resp.Data["ca_chain"] = derCaChain
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|
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default:
|
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return nil, fmt.Errorf("unsupported format argument: %s", format)
|
|
}
|
|
|
|
key := "certs/" + normalizeSerial(cb.SerialNumber)
|
|
certsCounted := b.certsCounted.Load()
|
|
err = req.Storage.Put(ctx, &logical.StorageEntry{
|
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Key: key,
|
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Value: parsedBundle.CertificateBytes,
|
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})
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to store certificate locally: %w", err)
|
|
}
|
|
b.ifCountEnabledIncrementTotalCertificatesCount(certsCounted, key)
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|
|
|
if parsedBundle.Certificate.MaxPathLen == 0 {
|
|
resp.AddWarning("Max path length of the signed certificate is zero. This certificate cannot be used to issue intermediate CA certificates.")
|
|
}
|
|
|
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resp = addWarnings(resp, warnings)
|
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|
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return resp, nil
|
|
}
|
|
|
|
func (b *backend) pathIssuerSignSelfIssued(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
|
|
var err error
|
|
|
|
issuerName := getIssuerRef(data)
|
|
if len(issuerName) == 0 {
|
|
return logical.ErrorResponse("missing issuer reference"), nil
|
|
}
|
|
|
|
certPem := data.Get("certificate").(string)
|
|
block, _ := pem.Decode([]byte(certPem))
|
|
if block == nil || len(block.Bytes) == 0 {
|
|
return logical.ErrorResponse("certificate could not be PEM-decoded"), nil
|
|
}
|
|
certs, err := x509.ParseCertificates(block.Bytes)
|
|
if err != nil {
|
|
return logical.ErrorResponse(fmt.Sprintf("error parsing certificate: %s", err)), nil
|
|
}
|
|
if len(certs) != 1 {
|
|
return logical.ErrorResponse(fmt.Sprintf("%d certificates found in PEM file, expected 1", len(certs))), nil
|
|
}
|
|
|
|
cert := certs[0]
|
|
if !cert.IsCA {
|
|
return logical.ErrorResponse("given certificate is not a CA certificate"), nil
|
|
}
|
|
if !reflect.DeepEqual(cert.Issuer, cert.Subject) {
|
|
return logical.ErrorResponse("given certificate is not self-issued"), nil
|
|
}
|
|
|
|
var caErr error
|
|
sc := b.makeStorageContext(ctx, req.Storage)
|
|
signingBundle, caErr := sc.fetchCAInfo(issuerName, IssuanceUsage)
|
|
if caErr != nil {
|
|
switch caErr.(type) {
|
|
case errutil.UserError:
|
|
return nil, errutil.UserError{Err: fmt.Sprintf(
|
|
"could not fetch the CA certificate (was one set?): %s", caErr)}
|
|
default:
|
|
return nil, errutil.InternalError{Err: fmt.Sprintf("error fetching CA certificate: %s", caErr)}
|
|
}
|
|
}
|
|
|
|
signingCB, err := signingBundle.ToCertBundle()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error converting raw signing bundle to cert bundle: %w", err)
|
|
}
|
|
|
|
urls := &certutil.URLEntries{}
|
|
if signingBundle.URLs != nil {
|
|
urls = signingBundle.URLs
|
|
}
|
|
cert.IssuingCertificateURL = urls.IssuingCertificates
|
|
cert.CRLDistributionPoints = urls.CRLDistributionPoints
|
|
cert.OCSPServer = urls.OCSPServers
|
|
|
|
// If the requested signature algorithm isn't the same as the signing certificate, and
|
|
// the user has requested a cross-algorithm signature, reset the template's signing algorithm
|
|
// to that of the signing key
|
|
signingPubType, signingAlgorithm, err := publicKeyType(signingBundle.Certificate.PublicKey)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error determining signing certificate algorithm type: %e", err)
|
|
}
|
|
certPubType, _, err := publicKeyType(cert.PublicKey)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error determining template algorithm type: %e", err)
|
|
}
|
|
|
|
if signingPubType != certPubType {
|
|
b, ok := data.GetOk("require_matching_certificate_algorithms")
|
|
if !ok || !b.(bool) {
|
|
cert.SignatureAlgorithm = signingAlgorithm
|
|
} else {
|
|
return nil, fmt.Errorf("signing certificate's public key algorithm (%s) does not match submitted certificate's (%s), and require_matching_certificate_algorithms is true",
|
|
signingPubType.String(), certPubType.String())
|
|
}
|
|
}
|
|
|
|
newCert, err := x509.CreateCertificate(rand.Reader, cert, signingBundle.Certificate, cert.PublicKey, signingBundle.PrivateKey)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error signing self-issued certificate: %w", err)
|
|
}
|
|
if len(newCert) == 0 {
|
|
return nil, fmt.Errorf("nil cert was created when signing self-issued certificate")
|
|
}
|
|
pemCert := pem.EncodeToMemory(&pem.Block{
|
|
Type: "CERTIFICATE",
|
|
Bytes: newCert,
|
|
})
|
|
|
|
return &logical.Response{
|
|
Data: map[string]interface{}{
|
|
"certificate": strings.TrimSpace(string(pemCert)),
|
|
"issuing_ca": signingCB.Certificate,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
// Adapted from similar code in https://github.com/golang/go/blob/4a4221e8187189adcc6463d2d96fe2e8da290132/src/crypto/x509/x509.go#L1342,
|
|
// may need to be updated in the future.
|
|
func publicKeyType(pub crypto.PublicKey) (pubType x509.PublicKeyAlgorithm, sigAlgo x509.SignatureAlgorithm, err error) {
|
|
switch pub := pub.(type) {
|
|
case *rsa.PublicKey:
|
|
pubType = x509.RSA
|
|
sigAlgo = x509.SHA256WithRSA
|
|
case *ecdsa.PublicKey:
|
|
pubType = x509.ECDSA
|
|
switch pub.Curve {
|
|
case elliptic.P224(), elliptic.P256():
|
|
sigAlgo = x509.ECDSAWithSHA256
|
|
case elliptic.P384():
|
|
sigAlgo = x509.ECDSAWithSHA384
|
|
case elliptic.P521():
|
|
sigAlgo = x509.ECDSAWithSHA512
|
|
default:
|
|
err = errors.New("x509: unknown elliptic curve")
|
|
}
|
|
case ed25519.PublicKey:
|
|
pubType = x509.Ed25519
|
|
sigAlgo = x509.PureEd25519
|
|
default:
|
|
err = errors.New("x509: only RSA, ECDSA and Ed25519 keys supported")
|
|
}
|
|
return
|
|
}
|
|
|
|
const pathGenerateRootHelpSyn = `
|
|
Generate a new CA certificate and private key used for signing.
|
|
`
|
|
|
|
const pathGenerateRootHelpDesc = `
|
|
See the API documentation for more information.
|
|
`
|
|
|
|
const pathDeleteRootHelpSyn = `
|
|
Deletes the root CA key to allow a new one to be generated.
|
|
`
|
|
|
|
const pathDeleteRootHelpDesc = `
|
|
See the API documentation for more information.
|
|
`
|