a8764e0cf1
A lot of places took a (context, backend, request) tuple, ignoring the request proper and only using it for its storage. This (modified) tuple is exactly the set of elements in the shared storage context, so we should be using that instead of manually passing all three elements around. This simplifies a few places where we'd generate a storage context at the request level and then split it apart only to recreate it again later (e.g., CRL building). Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
618 lines
21 KiB
Go
618 lines
21 KiB
Go
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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"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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// 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.
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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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// 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.incrementTotalCertificatesCount(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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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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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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caChain := append([]string{cb.Certificate}, cb.CAChain...)
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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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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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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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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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default:
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return nil, fmt.Errorf("unsupported format argument: %s", format)
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}
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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.incrementTotalCertificatesCount(certsCounted, key)
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if parsedBundle.Certificate.MaxPathLen == 0 {
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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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}
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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) pathIssuerSignSelfIssued(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)
|
|
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.
|
|
`
|