// ParseCertificatesDER parses a DER encoding of a certificate object and possibly private key,
// either PKCS #7, PKCS #12, or raw x509.
func ParseCertificatesDER(certsDER []byte, password string) (certs []*x509.Certificate, key crypto.Signer, err error) {
certsDER = bytes.TrimSpace(certsDER)
pkcs7data, err := pkcs7.ParsePKCS7(certsDER)
if err != nil {
var pkcs12data interface{}
certs = make([]*x509.Certificate, 1)
pkcs12data, certs[0], err = pkcs12.Decode(certsDER, password)
if err != nil {
certs, err = x509.ParseCertificates(certsDER)
if err != nil {
return nil, nil, cferr.New(cferr.CertificateError, cferr.DecodeFailed)
}
} else {
key = pkcs12data.(crypto.Signer)
}
} else {
if pkcs7data.ContentInfo != "SignedData" {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.DecodeFailed, errors.New("can only extract certificates from signed data content info"))
}
certs = pkcs7data.Content.SignedData.Certificates
}
if certs == nil {
return nil, key, cferr.New(cferr.CertificateError, cferr.DecodeFailed)
}
return certs, key, nil
}
// NewBundlerFromPEM creates a new Bundler from PEM-encoded root certificates and
// intermediate certificates.
func NewBundlerFromPEM(caBundlePEM, intBundlePEM []byte) (*Bundler, error) {
b := &Bundler{
RootPool: x509.NewCertPool(),
IntermediatePool: x509.NewCertPool(),
KnownIssuers: map[string]bool{},
}
log.Debug("parsing root certificates from PEM")
roots, err := helpers.ParseCertificatesPEM(caBundlePEM)
if err != nil {
log.Errorf("failed to parse root bundle: %v", err)
return nil, errors.New(errors.RootError, errors.ParseFailed)
}
log.Debug("parse intermediate certificates from PEM")
var intermediates []*x509.Certificate
if intermediates, err = helpers.ParseCertificatesPEM(intBundlePEM); err != nil {
log.Errorf("failed to parse intermediate bundle: %v", err)
return nil, errors.New(errors.IntermediatesError, errors.ParseFailed)
}
log.Debug("building certificate pools")
for _, c := range roots {
b.RootPool.AddCert(c)
b.KnownIssuers[string(c.Signature)] = true
}
for _, c := range intermediates {
b.IntermediatePool.AddCert(c)
b.KnownIssuers[string(c.Signature)] = true
}
log.Debug("bundler set up")
return b, nil
}
// Dial initiates a TLS connection to an outbound server. It returns a
// TLS connection to the server.
func Dial(address string, tr *Transport) (*tls.Conn, error) {
host, _, err := net.SplitHostPort(address)
if err != nil {
// Assume address is a hostname, and that it should
// use the HTTPS port number.
host = address
address = net.JoinHostPort(address, "443")
}
cfg, err := tr.TLSClientAuthClientConfig(host)
if err != nil {
return nil, err
}
conn, err := tls.Dial("tcp", address, cfg)
if err != nil {
return nil, err
}
state := conn.ConnectionState()
if len(state.VerifiedChains) == 0 {
return nil, errors.New(errors.CertificateError, errors.VerifyFailed)
}
for _, chain := range state.VerifiedChains {
for _, cert := range chain {
revoked, ok := revoke.VerifyCertificate(cert)
if (!tr.RevokeSoftFail && !ok) || revoked {
return nil, errors.New(errors.CertificateError, errors.VerifyFailed)
}
}
}
return conn, nil
}
// NewBundler creates a new Bundler from the files passed in; these
// files should contain a list of valid root certificates and a list
// of valid intermediate certificates, respectively.
func NewBundler(caBundleFile, intBundleFile string) (*Bundler, error) {
log.Debug("Loading CA bundle: ", caBundleFile)
caBundlePEM, err := ioutil.ReadFile(caBundleFile)
if err != nil {
log.Errorf("root bundle failed to load: %v", err)
return nil, errors.New(errors.RootError, errors.None, err)
}
log.Debug("Loading Intermediate bundle: ", intBundleFile)
intBundlePEM, err := ioutil.ReadFile(intBundleFile)
if err != nil {
log.Errorf("intermediate bundle failed to load: %v", err)
return nil, errors.New(errors.IntermediatesError, errors.None, err)
}
if _, err := os.Stat(IntermediateStash); err != nil && os.IsNotExist(err) {
log.Infof("intermediate stash directory %s doesn't exist, creating", IntermediateStash)
err = os.MkdirAll(IntermediateStash, 0755)
if err != nil {
log.Errorf("failed to create intermediate stash directory %s: %v", err)
return nil, err
}
log.Infof("intermediate stash directory %s created", IntermediateStash)
}
return NewBundlerFromPEM(caBundlePEM, intBundlePEM)
}
// NewAuthHandlerFromSigner creates a new AuthHandler from the signer
// that is passed in.
func NewAuthHandlerFromSigner(signer signer.Signer) (http.Handler, error) {
policy := signer.Policy()
if policy == nil {
return nil, errors.New(errors.PolicyError, errors.InvalidPolicy)
}
if policy.Default == nil && policy.Profiles == nil {
return nil, errors.New(errors.PolicyError, errors.InvalidPolicy)
}
// AuthSign will not respond for profiles that have no auth provider.
// So if there are no profiles with auth providers in this policy,
// we return an error.
haveAuth := (policy.Default.Provider != nil)
for _, profile := range policy.Profiles {
if haveAuth {
break
}
haveAuth = (profile.Provider != nil)
}
if !haveAuth {
return nil, errors.New(errors.PolicyError, errors.InvalidPolicy)
}
return &api.HTTPHandler{
Handler: &AuthHandler{
signer: signer,
},
Methods: []string{"POST"},
}, nil
}
// ParseCertificatesDER parses a DER encoding of a certificate object and possibly private key,
// either PKCS #7, PKCS #12, or raw x509.
func ParseCertificatesDER(certsDER []byte, password string) ([]*x509.Certificate, crypto.Signer, error) {
var certs []*x509.Certificate
var key crypto.Signer
certsDER = bytes.TrimSpace(certsDER)
pkcs7data, err := pkcs7.ParsePKCS7(certsDER)
if err != nil {
pkcs12data, err := pkcs12.ParsePKCS12(certsDER, []byte(password))
if err != nil {
certs, err = x509.ParseCertificates(certsDER)
if err != nil {
return nil, nil, cferr.New(cferr.CertificateError, cferr.DecodeFailed)
}
} else {
key = pkcs12data.PrivateKey
certs = pkcs12data.Certificates
}
} else {
if pkcs7data.ContentInfo != "SignedData" {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.DecodeFailed, errors.New("can only extract certificates from signed data content info"))
}
certs = pkcs7data.Content.SignedData.Certificates
}
if certs == nil {
return nil, key, cferr.New(cferr.CertificateError, cferr.DecodeFailed)
}
return certs, key, nil
}
// ParsePrivateKeyDER parses a PKCS #1, PKCS #8, or elliptic curve
// DER-encoded private key. The key must not be in PEM format.
func ParsePrivateKeyDER(keyDER []byte) (key crypto.Signer, err error) {
generalKey, err := x509.ParsePKCS8PrivateKey(keyDER)
if err != nil {
generalKey, err = x509.ParsePKCS1PrivateKey(keyDER)
if err != nil {
generalKey, err = x509.ParseECPrivateKey(keyDER)
if err != nil {
// We don't include the actual error into
// the final error. The reason might be
// we don't want to leak any info about
// the private key.
return nil, cferr.New(cferr.PrivateKeyError,
cferr.ParseFailed)
}
}
}
switch generalKey.(type) {
case *rsa.PrivateKey:
return generalKey.(*rsa.PrivateKey), nil
case *ecdsa.PrivateKey:
return generalKey.(*ecdsa.PrivateKey), nil
}
// should never reach here
return nil, cferr.New(cferr.PrivateKeyError, cferr.ParseFailed)
}
// Sign signs a new certificate based on the PEM-encoded client
// certificate or certificate request with the signing profile, specified by profileName.
// The certificate will be valid for the host named in the hostName parameter.
func (s *Signer) Sign(hostName string, in []byte, profileName string) (cert []byte, err error) {
profile := s.Policy.Profiles[profileName]
block, _ := pem.Decode(in)
if block == nil {
return nil, cferr.New(cferr.CertificateError, cferr.DecodeFailed, err)
}
var template *x509.Certificate
switch block.Type {
case "CERTIFICATE":
template, err = helpers.ParseSelfSignedCertificatePEM(in)
case "CERTIFICATE REQUEST":
template, err = s.parseCertificateRequest(block.Bytes)
default:
return nil, cferr.New(cferr.CertificateError, cferr.ParseFailed, errors.New("Not a certificate or csr."))
}
if err != nil {
return
}
if ip := net.ParseIP(hostName); ip != nil {
template.IPAddresses = []net.IP{ip}
} else {
template.DNSNames = []string{hostName}
}
return s.sign(template, profile)
}
// NewSignHandlerFromSigner generates a new SignHandler directly from
// an existing signer.
func NewSignHandlerFromSigner(s signer.Signer) (h http.Handler, err error) {
policy := s.Policy()
if policy == nil {
err = errors.New(errors.PolicyError, errors.InvalidPolicy)
return
}
// Sign will only respond for profiles that have no auth provider.
// So if all of the profiles require authentication, we return an error.
haveUnauth := (policy.Default.Provider == nil)
for _, profile := range policy.Profiles {
if !haveUnauth {
break
}
haveUnauth = (profile.Provider == nil)
}
if !haveUnauth {
err = errors.New(errors.PolicyError, errors.InvalidPolicy)
return
}
return &api.HTTPHandler{
Handler: &SignHandler{
signer: s,
},
Methods: []string{"POST"},
}, nil
}
// ParsePrivateKeyPEM parses and returns a PEM-encoded private
// key. The private key may be either an unencrypted PKCS#8, PKCS#1,
// or elliptic private key.
func ParsePrivateKeyPEM(keyPEM []byte) (key interface{}, err error) {
keyDER, _ := pem.Decode(keyPEM)
if keyDER == nil {
return nil, cferr.New(cferr.PrivateKeyError, cferr.DecodeFailed, nil)
}
if procType, ok := keyDER.Headers["Proc-Type"]; ok {
if strings.Contains(procType, "ENCRYPTED") {
return nil, cferr.New(cferr.PrivateKeyError, cferr.Encrypted, nil)
}
}
key, err = x509.ParsePKCS8PrivateKey(keyDER.Bytes)
if err != nil {
key, err = x509.ParsePKCS1PrivateKey(keyDER.Bytes)
if err != nil {
key, err = x509.ParseECPrivateKey(keyDER.Bytes)
if err != nil {
// We don't include the actual error into the final error.
// The reason might be we don't want to leak any info about
// the private key.
return nil, cferr.New(cferr.PrivateKeyError, cferr.ParseFailed, nil)
}
}
}
return
}
// BundleFromRemote fetches the certificate chain served by the server at
// serverName (or ip, if the ip argument is not the empty string). It
// is expected that the method will be able to make a connection at
// port 443. The chain used by the server in this connection is
// used to rebuild the bundle.
func (b *Bundler) BundleFromRemote(serverName, ip string) (*Bundle, error) {
config := &tls.Config{
RootCAs: b.RootPool,
ServerName: serverName,
}
// Dial by IP if present
var dialName string
if ip != "" {
dialName = ip + ":443"
} else {
dialName = serverName + ":443"
}
log.Debugf("bundling from remote %s", dialName)
conn, err := tls.Dial("tcp", dialName, config)
var dialError string
// If there's an error in tls.Dial, try again with
// InsecureSkipVerify to fetch the remote bundle to (re-)bundle with.
// If the bundle is indeed not usable (expired, mismatched hostnames, etc.),
// report the error.
// Otherwise, create a working bundle and insert the tls error in the bundle.Status.
if err != nil {
log.Debugf("dial failed: %v", err)
// record the error msg
dialError = fmt.Sprintf("Failed rigid TLS handshake with %s: %v", dialName, err)
// dial again with InsecureSkipVerify
log.Debugf("try again with InsecureSkipVerify.")
config.InsecureSkipVerify = true
conn, err = tls.Dial("tcp", dialName, config)
if err != nil {
log.Debugf("dial with InsecureSkipVerify failed: %v", err)
return nil, errors.New(errors.DialError, errors.Unknown, err)
}
}
connState := conn.ConnectionState()
certs := connState.PeerCertificates
err = conn.VerifyHostname(serverName)
if err != nil {
log.Debugf("failed to verify hostname: %v", err)
return nil, errors.New(errors.CertificateError, errors.VerifyFailed, err)
}
// verify peer intermediates and store them if there is any missing from the bundle.
// Don't care if there is error, will throw it any way in Bundle() call.
b.fetchIntermediates(certs)
// Bundle with remote certs. Inject the initial dial error, if any, to the status reporting.
bundle, err := b.Bundle(certs, nil, Ubiquitous)
if err != nil {
return nil, err
} else if dialError != "" {
bundle.Status.Messages = append(bundle.Status.Messages, dialError)
}
return bundle, err
}
// NewSigner generates a new certificate signer from a Root structure.
// This is one of two standard signers: local or remote. If the root
// structure specifies a force remote, then a remote signer is created,
// otherwise either a remote or local signer is generated based on the
// policy. For a local signer, the CertFile and KeyFile need to be
// defined in Root.
func NewSigner(root Root, policy *config.Signing) (signer.Signer, error) {
if policy == nil {
policy = &config.Signing{
Profiles: map[string]*config.SigningProfile{},
Default: config.DefaultConfig(),
}
}
if !policy.Valid() {
return nil, cferr.New(cferr.PolicyError, cferr.InvalidPolicy)
}
var s signer.Signer
var err error
if root.ForceRemote {
s, err = remote.NewSigner(policy)
} else {
if policy.NeedsLocalSigner() && policy.NeedsRemoteSigner() {
// Currently we don't support a hybrid signer
return nil, cferr.New(cferr.PolicyError, cferr.InvalidPolicy)
}
if policy.NeedsLocalSigner() {
// shouldProvide indicates whether the
// function *should* have produced a key. If
// it's true, we should use the signer and
// error returned. Otherwise, keep looking for
// signers.
var shouldProvide bool
// localSignerList is defined in the
// universal_signers*.go files. These activate
// and deactivate signers based on build
// flags; for example,
// universal_signers_pkcs11.go contains a list
// of valid signers when PKCS #11 is turned
// on.
for _, possibleSigner := range localSignerList {
s, shouldProvide, err = possibleSigner(&root, policy)
if shouldProvide {
break
}
}
if s == nil {
err = cferr.New(cferr.PrivateKeyError, cferr.Unknown)
}
}
if policy.NeedsRemoteSigner() {
s, err = remote.NewSigner(policy)
}
}
return s, err
}
// NewSigner creates a new remote Signer directly from a
// signing policy.
func NewSigner(policy *config.Signing) (*Signer, error) {
if policy != nil {
if !policy.Valid() {
return nil, cferr.New(cferr.PolicyError,
cferr.InvalidPolicy)
}
return &Signer{policy: policy}, nil
}
return nil, cferr.New(cferr.PolicyError,
cferr.InvalidPolicy)
}
// ParseCertificatePEM parses and returns a PEM-encoded certificate.
func ParseCertificatePEM(certPEM []byte) (*x509.Certificate, error) {
certPEM = bytes.TrimSpace(certPEM)
cert, rest, err := ParseOneCertificateFromPEM(certPEM)
if err != nil {
return nil, cferr.New(cferr.CertificateError, cferr.ParseFailed, err)
} else if cert == nil {
return nil, cferr.New(cferr.CertificateError, cferr.DecodeFailed, nil)
} else if len(rest) > 0 {
return nil, cferr.New(cferr.CertificateError, cferr.ParseFailed, errors.New("The PEM file should contain only one certificate."))
}
return cert, nil
}
// GetKeyDERFromPEM parses a PEM-encoded private key and returns DER-format key bytes.
func GetKeyDERFromPEM(in []byte) ([]byte, error) {
keyDER, _ := pem.Decode(in)
if keyDER != nil {
if procType, ok := keyDER.Headers["Proc-Type"]; ok {
if strings.Contains(procType, "ENCRYPTED") {
return nil, cferr.New(cferr.PrivateKeyError, cferr.Encrypted)
}
}
return keyDER.Bytes, nil
}
return nil, cferr.New(cferr.PrivateKeyError, cferr.DecodeFailed)
}
func newLocalSigner(root Root, policy *config.Signing) (s signer.Signer, err error) {
// shouldProvide indicates whether the
// function *should* have produced a key. If
// it's true, we should use the signer and
// error returned. Otherwise, keep looking for
// signers.
var shouldProvide bool
// localSignerList is defined in the
// universal_signers*.go files. These activate
// and deactivate signers based on build
// flags; for example,
// universal_signers_pkcs11.go contains a list
// of valid signers when PKCS #11 is turned
// on.
for _, possibleSigner := range localSignerList {
s, shouldProvide, err = possibleSigner(&root, policy)
if shouldProvide {
break
}
}
if s == nil {
err = cferr.New(cferr.PrivateKeyError, cferr.Unknown)
}
return s, err
}
// NewSigner generates a new certificate signer from a Root structure.
// This is one of two standard signers: local or remote. If the root
// structure specifies a force remote, then a remote signer is created,
// otherwise either a remote or local signer is generated based on the
// policy. For a local signer, the CertFile and KeyFile need to be
// defined in Root.
func NewSigner(root Root, policy *config.Signing) (signer.Signer, error) {
if policy == nil {
policy = &config.Signing{
Profiles: map[string]*config.SigningProfile{},
Default: config.DefaultConfig(),
}
}
if !policy.Valid() {
return nil, cferr.New(cferr.PolicyError, cferr.InvalidPolicy)
}
var s signer.Signer
var err error
if root.ForceRemote {
s, err = remote.NewSigner(policy)
} else {
if policy.NeedsLocalSigner() && policy.NeedsRemoteSigner() {
s, err = newUniversalSigner(root, policy)
} else {
if policy.NeedsLocalSigner() {
s, err = newLocalSigner(root, policy)
}
if policy.NeedsRemoteSigner() {
s, err = remote.NewSigner(policy)
}
}
}
return s, err
}
// post connects to the remote server and returns a Response struct
func (srv *server) post(url string, jsonData []byte) (*api.Response, error) {
buf := bytes.NewBuffer(jsonData)
resp, err := http.Post(url, "application/json", buf)
if err != nil {
return nil, errors.Wrap(errors.APIClientError, errors.ClientHTTPError, err)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, errors.Wrap(errors.APIClientError, errors.IOError, err)
}
resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, errors.Wrap(errors.APIClientError, errors.ClientHTTPError, stderr.New(string(body)))
}
var response api.Response
err = json.Unmarshal(body, &response)
if err != nil {
log.Debug("Unable to parse response body:", string(body))
return nil, errors.Wrap(errors.APIClientError, errors.JSONError, err)
}
if !response.Success || response.Result == nil {
if len(response.Errors) > 0 {
return nil, errors.Wrap(errors.APIClientError, errors.ServerRequestFailed, stderr.New(response.Errors[0].Message))
}
return nil, errors.New(errors.APIClientError, errors.ServerRequestFailed)
}
return &response, nil
}
// Generate creates a new CSR from a CertificateRequest structure and
// an existing key. The KeyRequest field is ignored.
func Generate(priv crypto.Signer, req *CertificateRequest) (csr []byte, err error) {
sigAlgo := helpers.SignerAlgo(priv, crypto.SHA256)
if sigAlgo == x509.UnknownSignatureAlgorithm {
return nil, cferr.New(cferr.PrivateKeyError, cferr.Unavailable)
}
var tpl = x509.CertificateRequest{
Subject: req.Name(),
SignatureAlgorithm: sigAlgo,
}
for i := range req.Hosts {
if ip := net.ParseIP(req.Hosts[i]); ip != nil {
tpl.IPAddresses = append(tpl.IPAddresses, ip)
} else {
tpl.DNSNames = append(tpl.DNSNames, req.Hosts[i])
}
}
csr, err = x509.CreateCertificateRequest(rand.Reader, &tpl, priv)
if err != nil {
log.Errorf("failed to generate a CSR: %v", err)
err = cferr.Wrap(cferr.CSRError, cferr.BadRequest, err)
return
}
block := pem.Block{
Type: "CERTIFICATE REQUEST",
Bytes: csr,
}
log.Info("encoded CSR")
csr = pem.EncodeToMemory(&block)
return
}
// pkcs11Signer looks for token, module, slot, and PIN configuration
// options in the root.
func pkcs11Signer(root *Root, policy *config.Signing) (signer.Signer, bool, error) {
module := root.Config["pkcs11-module"]
tokenLabel := root.Config["pkcs11-token-label"]
privateKeyLabel := root.Config["pkcs11-private-key-label"]
userPIN := root.Config["pkcs11-user-pin"]
certFile := root.Config["cert-file"]
if module == "" && tokenLabel == "" && privateKeyLabel == "" && userPIN == "" {
return nil, false, nil
}
if !pkcs11.Enabled {
return nil, true, cferr.New(cferr.PrivateKeyError, cferr.Unavailable)
}
conf := pkcs11.Config{
Module: module,
Token: tokenLabel,
Label: privateKeyLabel,
PIN: userPIN,
}
s, err := pkcs11.New(certFile, policy, &conf)
return s, true, err
}
// ParseCertificatePEM parses and returns a PEM-encoded certificate,
// can handle PEM encoded PKCS #7 structures.
func ParseCertificatePEM(certPEM []byte) (*x509.Certificate, error) {
certPEM = bytes.TrimSpace(certPEM)
cert, rest, err := ParseOneCertificateFromPEM(certPEM)
if err != nil {
// Log the actual parsing error but throw a default parse error message.
log.Debugf("Certificate parsing error: %v", err)
return nil, cferr.New(cferr.CertificateError, cferr.ParseFailed)
} else if cert == nil {
return nil, cferr.New(cferr.CertificateError, cferr.DecodeFailed)
} else if len(rest) > 0 {
return nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, errors.New("the PEM file should contain only one object"))
} else if len(cert) > 1 {
return nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, errors.New("the PKCS7 object in the PEM file should contain only one certificate"))
}
return cert[0], nil
}
// Sign is used with an OCSP signer to request the issuance of
// an OCSP response.
func (s StandardSigner) Sign(req SignRequest) ([]byte, error) {
if req.Certificate == nil {
return nil, cferr.New(cferr.OCSPError, cferr.ReadFailed)
}
// Verify that req.Certificate is issued under s.issuer
if bytes.Compare(req.Certificate.RawIssuer, s.issuer.RawSubject) != 0 {
return nil, cferr.New(cferr.OCSPError, cferr.IssuerMismatch)
}
if req.Certificate.CheckSignatureFrom(s.issuer) != nil {
return nil, cferr.New(cferr.OCSPError, cferr.IssuerMismatch)
}
// Round thisUpdate times down to the nearest hour
thisUpdate := time.Now().Truncate(time.Hour)
nextUpdate := thisUpdate.Add(s.interval)
status, ok := StatusCode[req.Status]
if !ok {
return nil, cferr.New(cferr.OCSPError, cferr.InvalidStatus)
}
// If the OCSP responder is the same as the issuer, there is no need to
// include any certificate in the OCSP response, which decreases the byte size
// of OCSP responses dramatically.
certificate := s.responder
if s.issuer == s.responder || bytes.Equal(s.issuer.Raw, s.responder.Raw) {
certificate = nil
}
template := ocsp.Response{
Status: status,
SerialNumber: req.Certificate.SerialNumber,
ThisUpdate: thisUpdate,
NextUpdate: nextUpdate,
Certificate: certificate,
ExtraExtensions: req.Extensions,
IssuerHash: req.IssuerHash,
}
if status == ocsp.Revoked {
template.RevokedAt = req.RevokedAt
template.RevocationReason = req.Reason
}
return ocsp.CreateResponse(s.issuer, s.responder, template, s.key)
}
// Sign signs a new certificate based on the PEM-encoded client
// certificate or certificate request with the signing profile,
// specified by profileName.
func (s *Signer) Sign(req signer.SignRequest) (cert []byte, err error) {
profile, err := signer.Profile(s, req.Profile)
if err != nil {
return
}
serialSeq := ""
if profile.UseSerialSeq {
serialSeq = req.SerialSeq
}
block, _ := pem.Decode([]byte(req.Request))
if block == nil {
return nil, cferr.New(cferr.CSRError, cferr.DecodeFailed)
}
if block.Type != "CERTIFICATE REQUEST" {
return nil, cferr.Wrap(cferr.CSRError,
cferr.BadRequest, errors.New("not a certificate or csr"))
}
csrTemplate, err := signer.ParseCertificateRequest(s, block.Bytes)
if err != nil {
return nil, err
}
// Copy out only the fields from the CSR authorized by policy.
safeTemplate := x509.Certificate{}
// If the profile contains no explicit whitelist, assume that all fields
// should be copied from the CSR.
if profile.CSRWhitelist == nil {
safeTemplate = *csrTemplate
} else {
if profile.CSRWhitelist.Subject {
safeTemplate.Subject = csrTemplate.Subject
}
if profile.CSRWhitelist.PublicKeyAlgorithm {
safeTemplate.PublicKeyAlgorithm = csrTemplate.PublicKeyAlgorithm
}
if profile.CSRWhitelist.PublicKey {
safeTemplate.PublicKey = csrTemplate.PublicKey
}
if profile.CSRWhitelist.SignatureAlgorithm {
safeTemplate.SignatureAlgorithm = csrTemplate.SignatureAlgorithm
}
if profile.CSRWhitelist.DNSNames {
safeTemplate.DNSNames = csrTemplate.DNSNames
}
if profile.CSRWhitelist.IPAddresses {
safeTemplate.IPAddresses = csrTemplate.IPAddresses
}
}
OverrideHosts(&safeTemplate, req.Hosts)
safeTemplate.Subject = PopulateSubjectFromCSR(req.Subject, safeTemplate.Subject)
return s.sign(&safeTemplate, profile, serialSeq)
}
// ParseSelfSignedCertificatePEM parses a PEM-encoded certificate and check if it is self-signed.
func ParseSelfSignedCertificatePEM(certPEM []byte) (*x509.Certificate, error) {
cert, err := ParseCertificatePEM(certPEM)
if err != nil {
return nil, err
}
if err := cert.CheckSignature(cert.SignatureAlgorithm, cert.RawTBSCertificate, cert.Signature); err != nil {
return nil, cferr.New(cferr.CertificateError, cferr.VerifyFailed, err)
}
return cert, nil
}
// NewBundlerFromPEM creates a new Bundler from PEM-encoded root certificates and
// intermediate certificates.
// If caBundlePEM is nil, the resulting Bundler can only do "Force" bundle.
func NewBundlerFromPEM(caBundlePEM, intBundlePEM []byte) (*Bundler, error) {
log.Debug("parsing root certificates from PEM")
roots, err := helpers.ParseCertificatesPEM(caBundlePEM)
if err != nil {
log.Errorf("failed to parse root bundle: %v", err)
return nil, errors.New(errors.RootError, errors.ParseFailed)
}
log.Debug("parse intermediate certificates from PEM")
intermediates, err := helpers.ParseCertificatesPEM(intBundlePEM)
if err != nil {
log.Errorf("failed to parse intermediate bundle: %v", err)
return nil, errors.New(errors.IntermediatesError, errors.ParseFailed)
}
b := &Bundler{
KnownIssuers: map[string]bool{},
IntermediatePool: x509.NewCertPool(),
}
log.Debug("building certificate pools")
// RootPool will be nil if caBundlePEM is nil, also
// that translates to caBundleFile is "".
// Systems root store will be used.
if caBundlePEM != nil {
b.RootPool = x509.NewCertPool()
}
for _, c := range roots {
b.RootPool.AddCert(c)
b.KnownIssuers[string(c.Signature)] = true
}
for _, c := range intermediates {
b.IntermediatePool.AddCert(c)
b.KnownIssuers[string(c.Signature)] = true
}
log.Debug("bundler set up")
return b, nil
}
// ParseCertificatesPEM parses a sequence of PEM-encoded certificate and returns them.
func ParseCertificatesPEM(certsPEM []byte) ([]*x509.Certificate, error) {
var certs []*x509.Certificate
var err error
certsPEM = bytes.TrimSpace(certsPEM)
for len(certsPEM) > 0 {
var cert *x509.Certificate
cert, certsPEM, err = ParseOneCertificateFromPEM(certsPEM)
if err != nil {
return nil, cferr.New(cferr.CertificateError, cferr.ParseFailed, err)
} else if cert == nil {
break
}
certs = append(certs, cert)
}
if len(certsPEM) > 0 {
return nil, cferr.New(cferr.CertificateError, cferr.DecodeFailed, nil)
}
return certs, nil
}
func NewRemoteCertGenerator(validator Validator, remote string) (http.Handler, error) {
log.Info("setting up a new remote certificate generator")
cg := new(RemoteCertGeneratorHandler)
if cg.remote = client.NewServer(remote); cg.remote == nil {
log.Errorf("invalid address for remote server")
return nil, errors.New(errors.DialError, errors.Unknown, nil)
}
cg.generator = &csr.Generator{validator}
return HttpHandler{cg, "POST"}, nil
}
// NewPKCS11Signer returns a new PKCS #11 signer.
func NewPKCS11Signer(cfg ocspConfig.Config) (ocsp.Signer, error) {
log.Debugf("Loading PKCS #11 module %s", cfg.PKCS11.Module)
certData, err := ioutil.ReadFile(cfg.CACertFile)
if err != nil {
return nil, errors.New(errors.CertificateError, errors.ReadFailed)
}
cert, err := helpers.ParseCertificatePEM(certData)
if err != nil {
return nil, err
}
PKCS11 := cfg.PKCS11
priv, err := pkcs11key.New(PKCS11.Module, PKCS11.Token, PKCS11.PIN,
PKCS11.Label)
if err != nil {
return nil, errors.New(errors.PrivateKeyError, errors.ReadFailed)
}
return ocsp.NewSigner(cert, cert, priv, cfg.Interval)
}
func (s *Signer) parseCertificateRequest(csrBytes []byte) (template *x509.Certificate, err error) {
csr, err := x509.ParseCertificateRequest(csrBytes)
if err != nil {
err = cferr.New(cferr.CertificateError, cferr.ParseFailed, err)
return
}
err = checkSignature(csr, csr.SignatureAlgorithm, csr.RawTBSCertificateRequest, csr.Signature)
if err != nil {
err = cferr.New(cferr.CertificateError, cferr.KeyMismatch, err)
return
}
template = &x509.Certificate{
Subject: csr.Subject,
PublicKeyAlgorithm: csr.PublicKeyAlgorithm,
PublicKey: csr.PublicKey,
SignatureAlgorithm: s.SigAlgo,
}
return
}
// getMatchingProfile returns the SigningProfile that matches the profile passed.
// if an empty profile string is passed it returns the default profile.
func (s *Signer) getMatchingProfile(profile string) (*config.SigningProfile, error) {
if profile == "" {
return s.policy.Default, nil
}
for p, signingProfile := range s.policy.Profiles {
if p == profile {
return signingProfile, nil
}
}
return nil, cferr.New(cferr.PolicyError, cferr.UnknownProfile)
}