diff options
author | Christopher Speller <crspeller@gmail.com> | 2018-04-16 05:37:14 -0700 |
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committer | Joram Wilander <jwawilander@gmail.com> | 2018-04-16 08:37:14 -0400 |
commit | 6e2cb00008cbf09e556b00f87603797fcaa47e09 (patch) | |
tree | 3c0eb55ff4226a3f024aad373140d1fb860a6404 /vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/acme/autocert/autocert.go | |
parent | bf24f51c4e1cc6286885460672f7f449e8c6f5ef (diff) | |
download | chat-6e2cb00008cbf09e556b00f87603797fcaa47e09.tar.gz chat-6e2cb00008cbf09e556b00f87603797fcaa47e09.tar.bz2 chat-6e2cb00008cbf09e556b00f87603797fcaa47e09.zip |
Depenancy upgrades and movign to dep. (#8630)
Diffstat (limited to 'vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/acme/autocert/autocert.go')
-rw-r--r-- | vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/acme/autocert/autocert.go | 821 |
1 files changed, 0 insertions, 821 deletions
diff --git a/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/acme/autocert/autocert.go b/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/acme/autocert/autocert.go deleted file mode 100644 index 94edba986..000000000 --- a/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/acme/autocert/autocert.go +++ /dev/null @@ -1,821 +0,0 @@ -// Copyright 2016 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package autocert provides automatic access to certificates from Let's Encrypt -// and any other ACME-based CA. -// -// This package is a work in progress and makes no API stability promises. -package autocert - -import ( - "bytes" - "context" - "crypto" - "crypto/ecdsa" - "crypto/elliptic" - "crypto/rand" - "crypto/rsa" - "crypto/tls" - "crypto/x509" - "crypto/x509/pkix" - "encoding/pem" - "errors" - "fmt" - "io" - mathrand "math/rand" - "net/http" - "strconv" - "strings" - "sync" - "time" - - "golang.org/x/crypto/acme" -) - -// createCertRetryAfter is how much time to wait before removing a failed state -// entry due to an unsuccessful createCert call. -// This is a variable instead of a const for testing. -// TODO: Consider making it configurable or an exp backoff? -var createCertRetryAfter = time.Minute - -// pseudoRand is safe for concurrent use. -var pseudoRand *lockedMathRand - -func init() { - src := mathrand.NewSource(timeNow().UnixNano()) - pseudoRand = &lockedMathRand{rnd: mathrand.New(src)} -} - -// AcceptTOS is a Manager.Prompt function that always returns true to -// indicate acceptance of the CA's Terms of Service during account -// registration. -func AcceptTOS(tosURL string) bool { return true } - -// HostPolicy specifies which host names the Manager is allowed to respond to. -// It returns a non-nil error if the host should be rejected. -// The returned error is accessible via tls.Conn.Handshake and its callers. -// See Manager's HostPolicy field and GetCertificate method docs for more details. -type HostPolicy func(ctx context.Context, host string) error - -// HostWhitelist returns a policy where only the specified host names are allowed. -// Only exact matches are currently supported. Subdomains, regexp or wildcard -// will not match. -func HostWhitelist(hosts ...string) HostPolicy { - whitelist := make(map[string]bool, len(hosts)) - for _, h := range hosts { - whitelist[h] = true - } - return func(_ context.Context, host string) error { - if !whitelist[host] { - return errors.New("acme/autocert: host not configured") - } - return nil - } -} - -// defaultHostPolicy is used when Manager.HostPolicy is not set. -func defaultHostPolicy(context.Context, string) error { - return nil -} - -// Manager is a stateful certificate manager built on top of acme.Client. -// It obtains and refreshes certificates automatically, -// as well as providing them to a TLS server via tls.Config. -// -// You must specify a cache implementation, such as DirCache, -// to reuse obtained certificates across program restarts. -// Otherwise your server is very likely to exceed the certificate -// issuer's request rate limits. -type Manager struct { - // Prompt specifies a callback function to conditionally accept a CA's Terms of Service (TOS). - // The registration may require the caller to agree to the CA's TOS. - // If so, Manager calls Prompt with a TOS URL provided by the CA. Prompt should report - // whether the caller agrees to the terms. - // - // To always accept the terms, the callers can use AcceptTOS. - Prompt func(tosURL string) bool - - // Cache optionally stores and retrieves previously-obtained certificates. - // If nil, certs will only be cached for the lifetime of the Manager. - // - // Manager passes the Cache certificates data encoded in PEM, with private/public - // parts combined in a single Cache.Put call, private key first. - Cache Cache - - // HostPolicy controls which domains the Manager will attempt - // to retrieve new certificates for. It does not affect cached certs. - // - // If non-nil, HostPolicy is called before requesting a new cert. - // If nil, all hosts are currently allowed. This is not recommended, - // as it opens a potential attack where clients connect to a server - // by IP address and pretend to be asking for an incorrect host name. - // Manager will attempt to obtain a certificate for that host, incorrectly, - // eventually reaching the CA's rate limit for certificate requests - // and making it impossible to obtain actual certificates. - // - // See GetCertificate for more details. - HostPolicy HostPolicy - - // RenewBefore optionally specifies how early certificates should - // be renewed before they expire. - // - // If zero, they're renewed 30 days before expiration. - RenewBefore time.Duration - - // Client is used to perform low-level operations, such as account registration - // and requesting new certificates. - // If Client is nil, a zero-value acme.Client is used with acme.LetsEncryptURL - // directory endpoint and a newly-generated ECDSA P-256 key. - // - // Mutating the field after the first call of GetCertificate method will have no effect. - Client *acme.Client - - // Email optionally specifies a contact email address. - // This is used by CAs, such as Let's Encrypt, to notify about problems - // with issued certificates. - // - // If the Client's account key is already registered, Email is not used. - Email string - - // ForceRSA makes the Manager generate certificates with 2048-bit RSA keys. - // - // If false, a default is used. Currently the default - // is EC-based keys using the P-256 curve. - ForceRSA bool - - clientMu sync.Mutex - client *acme.Client // initialized by acmeClient method - - stateMu sync.Mutex - state map[string]*certState // keyed by domain name - - // tokenCert is keyed by token domain name, which matches server name - // of ClientHello. Keys always have ".acme.invalid" suffix. - tokenCertMu sync.RWMutex - tokenCert map[string]*tls.Certificate - - // renewal tracks the set of domains currently running renewal timers. - // It is keyed by domain name. - renewalMu sync.Mutex - renewal map[string]*domainRenewal -} - -// GetCertificate implements the tls.Config.GetCertificate hook. -// It provides a TLS certificate for hello.ServerName host, including answering -// *.acme.invalid (TLS-SNI) challenges. All other fields of hello are ignored. -// -// If m.HostPolicy is non-nil, GetCertificate calls the policy before requesting -// a new cert. A non-nil error returned from m.HostPolicy halts TLS negotiation. -// The error is propagated back to the caller of GetCertificate and is user-visible. -// This does not affect cached certs. See HostPolicy field description for more details. -func (m *Manager) GetCertificate(hello *tls.ClientHelloInfo) (*tls.Certificate, error) { - if m.Prompt == nil { - return nil, errors.New("acme/autocert: Manager.Prompt not set") - } - - name := hello.ServerName - if name == "" { - return nil, errors.New("acme/autocert: missing server name") - } - if !strings.Contains(strings.Trim(name, "."), ".") { - return nil, errors.New("acme/autocert: server name component count invalid") - } - if strings.ContainsAny(name, `/\`) { - return nil, errors.New("acme/autocert: server name contains invalid character") - } - - ctx, cancel := context.WithTimeout(context.Background(), 5*time.Minute) - defer cancel() - - // check whether this is a token cert requested for TLS-SNI challenge - if strings.HasSuffix(name, ".acme.invalid") { - m.tokenCertMu.RLock() - defer m.tokenCertMu.RUnlock() - if cert := m.tokenCert[name]; cert != nil { - return cert, nil - } - if cert, err := m.cacheGet(ctx, name); err == nil { - return cert, nil - } - // TODO: cache error results? - return nil, fmt.Errorf("acme/autocert: no token cert for %q", name) - } - - // regular domain - name = strings.TrimSuffix(name, ".") // golang.org/issue/18114 - cert, err := m.cert(ctx, name) - if err == nil { - return cert, nil - } - if err != ErrCacheMiss { - return nil, err - } - - // first-time - if err := m.hostPolicy()(ctx, name); err != nil { - return nil, err - } - cert, err = m.createCert(ctx, name) - if err != nil { - return nil, err - } - m.cachePut(ctx, name, cert) - return cert, nil -} - -// cert returns an existing certificate either from m.state or cache. -// If a certificate is found in cache but not in m.state, the latter will be filled -// with the cached value. -func (m *Manager) cert(ctx context.Context, name string) (*tls.Certificate, error) { - m.stateMu.Lock() - if s, ok := m.state[name]; ok { - m.stateMu.Unlock() - s.RLock() - defer s.RUnlock() - return s.tlscert() - } - defer m.stateMu.Unlock() - cert, err := m.cacheGet(ctx, name) - if err != nil { - return nil, err - } - signer, ok := cert.PrivateKey.(crypto.Signer) - if !ok { - return nil, errors.New("acme/autocert: private key cannot sign") - } - if m.state == nil { - m.state = make(map[string]*certState) - } - s := &certState{ - key: signer, - cert: cert.Certificate, - leaf: cert.Leaf, - } - m.state[name] = s - go m.renew(name, s.key, s.leaf.NotAfter) - return cert, nil -} - -// cacheGet always returns a valid certificate, or an error otherwise. -// If a cached certficate exists but is not valid, ErrCacheMiss is returned. -func (m *Manager) cacheGet(ctx context.Context, domain string) (*tls.Certificate, error) { - if m.Cache == nil { - return nil, ErrCacheMiss - } - data, err := m.Cache.Get(ctx, domain) - if err != nil { - return nil, err - } - - // private - priv, pub := pem.Decode(data) - if priv == nil || !strings.Contains(priv.Type, "PRIVATE") { - return nil, ErrCacheMiss - } - privKey, err := parsePrivateKey(priv.Bytes) - if err != nil { - return nil, err - } - - // public - var pubDER [][]byte - for len(pub) > 0 { - var b *pem.Block - b, pub = pem.Decode(pub) - if b == nil { - break - } - pubDER = append(pubDER, b.Bytes) - } - if len(pub) > 0 { - // Leftover content not consumed by pem.Decode. Corrupt. Ignore. - return nil, ErrCacheMiss - } - - // verify and create TLS cert - leaf, err := validCert(domain, pubDER, privKey) - if err != nil { - return nil, ErrCacheMiss - } - tlscert := &tls.Certificate{ - Certificate: pubDER, - PrivateKey: privKey, - Leaf: leaf, - } - return tlscert, nil -} - -func (m *Manager) cachePut(ctx context.Context, domain string, tlscert *tls.Certificate) error { - if m.Cache == nil { - return nil - } - - // contains PEM-encoded data - var buf bytes.Buffer - - // private - switch key := tlscert.PrivateKey.(type) { - case *ecdsa.PrivateKey: - if err := encodeECDSAKey(&buf, key); err != nil { - return err - } - case *rsa.PrivateKey: - b := x509.MarshalPKCS1PrivateKey(key) - pb := &pem.Block{Type: "RSA PRIVATE KEY", Bytes: b} - if err := pem.Encode(&buf, pb); err != nil { - return err - } - default: - return errors.New("acme/autocert: unknown private key type") - } - - // public - for _, b := range tlscert.Certificate { - pb := &pem.Block{Type: "CERTIFICATE", Bytes: b} - if err := pem.Encode(&buf, pb); err != nil { - return err - } - } - - return m.Cache.Put(ctx, domain, buf.Bytes()) -} - -func encodeECDSAKey(w io.Writer, key *ecdsa.PrivateKey) error { - b, err := x509.MarshalECPrivateKey(key) - if err != nil { - return err - } - pb := &pem.Block{Type: "EC PRIVATE KEY", Bytes: b} - return pem.Encode(w, pb) -} - -// createCert starts the domain ownership verification and returns a certificate -// for that domain upon success. -// -// If the domain is already being verified, it waits for the existing verification to complete. -// Either way, createCert blocks for the duration of the whole process. -func (m *Manager) createCert(ctx context.Context, domain string) (*tls.Certificate, error) { - // TODO: maybe rewrite this whole piece using sync.Once - state, err := m.certState(domain) - if err != nil { - return nil, err - } - // state may exist if another goroutine is already working on it - // in which case just wait for it to finish - if !state.locked { - state.RLock() - defer state.RUnlock() - return state.tlscert() - } - - // We are the first; state is locked. - // Unblock the readers when domain ownership is verified - // and we got the cert or the process failed. - defer state.Unlock() - state.locked = false - - der, leaf, err := m.authorizedCert(ctx, state.key, domain) - if err != nil { - // Remove the failed state after some time, - // making the manager call createCert again on the following TLS hello. - time.AfterFunc(createCertRetryAfter, func() { - defer testDidRemoveState(domain) - m.stateMu.Lock() - defer m.stateMu.Unlock() - // Verify the state hasn't changed and it's still invalid - // before deleting. - s, ok := m.state[domain] - if !ok { - return - } - if _, err := validCert(domain, s.cert, s.key); err == nil { - return - } - delete(m.state, domain) - }) - return nil, err - } - state.cert = der - state.leaf = leaf - go m.renew(domain, state.key, state.leaf.NotAfter) - return state.tlscert() -} - -// certState returns a new or existing certState. -// If a new certState is returned, state.exist is false and the state is locked. -// The returned error is non-nil only in the case where a new state could not be created. -func (m *Manager) certState(domain string) (*certState, error) { - m.stateMu.Lock() - defer m.stateMu.Unlock() - if m.state == nil { - m.state = make(map[string]*certState) - } - // existing state - if state, ok := m.state[domain]; ok { - return state, nil - } - - // new locked state - var ( - err error - key crypto.Signer - ) - if m.ForceRSA { - key, err = rsa.GenerateKey(rand.Reader, 2048) - } else { - key, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader) - } - if err != nil { - return nil, err - } - - state := &certState{ - key: key, - locked: true, - } - state.Lock() // will be unlocked by m.certState caller - m.state[domain] = state - return state, nil -} - -// authorizedCert starts the domain ownership verification process and requests a new cert upon success. -// The key argument is the certificate private key. -func (m *Manager) authorizedCert(ctx context.Context, key crypto.Signer, domain string) (der [][]byte, leaf *x509.Certificate, err error) { - if err := m.verify(ctx, domain); err != nil { - return nil, nil, err - } - client, err := m.acmeClient(ctx) - if err != nil { - return nil, nil, err - } - csr, err := certRequest(key, domain) - if err != nil { - return nil, nil, err - } - der, _, err = client.CreateCert(ctx, csr, 0, true) - if err != nil { - return nil, nil, err - } - leaf, err = validCert(domain, der, key) - if err != nil { - return nil, nil, err - } - return der, leaf, nil -} - -// verify starts a new identifier (domain) authorization flow. -// It prepares a challenge response and then blocks until the authorization -// is marked as "completed" by the CA (either succeeded or failed). -// -// verify returns nil iff the verification was successful. -func (m *Manager) verify(ctx context.Context, domain string) error { - client, err := m.acmeClient(ctx) - if err != nil { - return err - } - - // start domain authorization and get the challenge - authz, err := client.Authorize(ctx, domain) - if err != nil { - return err - } - // maybe don't need to at all - if authz.Status == acme.StatusValid { - return nil - } - - // pick a challenge: prefer tls-sni-02 over tls-sni-01 - // TODO: consider authz.Combinations - var chal *acme.Challenge - for _, c := range authz.Challenges { - if c.Type == "tls-sni-02" { - chal = c - break - } - if c.Type == "tls-sni-01" { - chal = c - } - } - if chal == nil { - return errors.New("acme/autocert: no supported challenge type found") - } - - // create a token cert for the challenge response - var ( - cert tls.Certificate - name string - ) - switch chal.Type { - case "tls-sni-01": - cert, name, err = client.TLSSNI01ChallengeCert(chal.Token) - case "tls-sni-02": - cert, name, err = client.TLSSNI02ChallengeCert(chal.Token) - default: - err = fmt.Errorf("acme/autocert: unknown challenge type %q", chal.Type) - } - if err != nil { - return err - } - m.putTokenCert(ctx, name, &cert) - defer func() { - // verification has ended at this point - // don't need token cert anymore - go m.deleteTokenCert(name) - }() - - // ready to fulfill the challenge - if _, err := client.Accept(ctx, chal); err != nil { - return err - } - // wait for the CA to validate - _, err = client.WaitAuthorization(ctx, authz.URI) - return err -} - -// putTokenCert stores the cert under the named key in both m.tokenCert map -// and m.Cache. -func (m *Manager) putTokenCert(ctx context.Context, name string, cert *tls.Certificate) { - m.tokenCertMu.Lock() - defer m.tokenCertMu.Unlock() - if m.tokenCert == nil { - m.tokenCert = make(map[string]*tls.Certificate) - } - m.tokenCert[name] = cert - m.cachePut(ctx, name, cert) -} - -// deleteTokenCert removes the token certificate for the specified domain name -// from both m.tokenCert map and m.Cache. -func (m *Manager) deleteTokenCert(name string) { - m.tokenCertMu.Lock() - defer m.tokenCertMu.Unlock() - delete(m.tokenCert, name) - if m.Cache != nil { - m.Cache.Delete(context.Background(), name) - } -} - -// renew starts a cert renewal timer loop, one per domain. -// -// The loop is scheduled in two cases: -// - a cert was fetched from cache for the first time (wasn't in m.state) -// - a new cert was created by m.createCert -// -// The key argument is a certificate private key. -// The exp argument is the cert expiration time (NotAfter). -func (m *Manager) renew(domain string, key crypto.Signer, exp time.Time) { - m.renewalMu.Lock() - defer m.renewalMu.Unlock() - if m.renewal[domain] != nil { - // another goroutine is already on it - return - } - if m.renewal == nil { - m.renewal = make(map[string]*domainRenewal) - } - dr := &domainRenewal{m: m, domain: domain, key: key} - m.renewal[domain] = dr - dr.start(exp) -} - -// stopRenew stops all currently running cert renewal timers. -// The timers are not restarted during the lifetime of the Manager. -func (m *Manager) stopRenew() { - m.renewalMu.Lock() - defer m.renewalMu.Unlock() - for name, dr := range m.renewal { - delete(m.renewal, name) - dr.stop() - } -} - -func (m *Manager) accountKey(ctx context.Context) (crypto.Signer, error) { - const keyName = "acme_account.key" - - genKey := func() (*ecdsa.PrivateKey, error) { - return ecdsa.GenerateKey(elliptic.P256(), rand.Reader) - } - - if m.Cache == nil { - return genKey() - } - - data, err := m.Cache.Get(ctx, keyName) - if err == ErrCacheMiss { - key, err := genKey() - if err != nil { - return nil, err - } - var buf bytes.Buffer - if err := encodeECDSAKey(&buf, key); err != nil { - return nil, err - } - if err := m.Cache.Put(ctx, keyName, buf.Bytes()); err != nil { - return nil, err - } - return key, nil - } - if err != nil { - return nil, err - } - - priv, _ := pem.Decode(data) - if priv == nil || !strings.Contains(priv.Type, "PRIVATE") { - return nil, errors.New("acme/autocert: invalid account key found in cache") - } - return parsePrivateKey(priv.Bytes) -} - -func (m *Manager) acmeClient(ctx context.Context) (*acme.Client, error) { - m.clientMu.Lock() - defer m.clientMu.Unlock() - if m.client != nil { - return m.client, nil - } - - client := m.Client - if client == nil { - client = &acme.Client{DirectoryURL: acme.LetsEncryptURL} - } - if client.Key == nil { - var err error - client.Key, err = m.accountKey(ctx) - if err != nil { - return nil, err - } - } - var contact []string - if m.Email != "" { - contact = []string{"mailto:" + m.Email} - } - a := &acme.Account{Contact: contact} - _, err := client.Register(ctx, a, m.Prompt) - if ae, ok := err.(*acme.Error); err == nil || ok && ae.StatusCode == http.StatusConflict { - // conflict indicates the key is already registered - m.client = client - err = nil - } - return m.client, err -} - -func (m *Manager) hostPolicy() HostPolicy { - if m.HostPolicy != nil { - return m.HostPolicy - } - return defaultHostPolicy -} - -func (m *Manager) renewBefore() time.Duration { - if m.RenewBefore > renewJitter { - return m.RenewBefore - } - return 720 * time.Hour // 30 days -} - -// certState is ready when its mutex is unlocked for reading. -type certState struct { - sync.RWMutex - locked bool // locked for read/write - key crypto.Signer // private key for cert - cert [][]byte // DER encoding - leaf *x509.Certificate // parsed cert[0]; always non-nil if cert != nil -} - -// tlscert creates a tls.Certificate from s.key and s.cert. -// Callers should wrap it in s.RLock() and s.RUnlock(). -func (s *certState) tlscert() (*tls.Certificate, error) { - if s.key == nil { - return nil, errors.New("acme/autocert: missing signer") - } - if len(s.cert) == 0 { - return nil, errors.New("acme/autocert: missing certificate") - } - return &tls.Certificate{ - PrivateKey: s.key, - Certificate: s.cert, - Leaf: s.leaf, - }, nil -} - -// certRequest creates a certificate request for the given common name cn -// and optional SANs. -func certRequest(key crypto.Signer, cn string, san ...string) ([]byte, error) { - req := &x509.CertificateRequest{ - Subject: pkix.Name{CommonName: cn}, - DNSNames: san, - } - return x509.CreateCertificateRequest(rand.Reader, req, key) -} - -// Attempt to parse the given private key DER block. OpenSSL 0.9.8 generates -// PKCS#1 private keys by default, while OpenSSL 1.0.0 generates PKCS#8 keys. -// OpenSSL ecparam generates SEC1 EC private keys for ECDSA. We try all three. -// -// Inspired by parsePrivateKey in crypto/tls/tls.go. -func parsePrivateKey(der []byte) (crypto.Signer, error) { - if key, err := x509.ParsePKCS1PrivateKey(der); err == nil { - return key, nil - } - if key, err := x509.ParsePKCS8PrivateKey(der); err == nil { - switch key := key.(type) { - case *rsa.PrivateKey: - return key, nil - case *ecdsa.PrivateKey: - return key, nil - default: - return nil, errors.New("acme/autocert: unknown private key type in PKCS#8 wrapping") - } - } - if key, err := x509.ParseECPrivateKey(der); err == nil { - return key, nil - } - - return nil, errors.New("acme/autocert: failed to parse private key") -} - -// validCert parses a cert chain provided as der argument and verifies the leaf, der[0], -// corresponds to the private key, as well as the domain match and expiration dates. -// It doesn't do any revocation checking. -// -// The returned value is the verified leaf cert. -func validCert(domain string, der [][]byte, key crypto.Signer) (leaf *x509.Certificate, err error) { - // parse public part(s) - var n int - for _, b := range der { - n += len(b) - } - pub := make([]byte, n) - n = 0 - for _, b := range der { - n += copy(pub[n:], b) - } - x509Cert, err := x509.ParseCertificates(pub) - if len(x509Cert) == 0 { - return nil, errors.New("acme/autocert: no public key found") - } - // verify the leaf is not expired and matches the domain name - leaf = x509Cert[0] - now := timeNow() - if now.Before(leaf.NotBefore) { - return nil, errors.New("acme/autocert: certificate is not valid yet") - } - if now.After(leaf.NotAfter) { - return nil, errors.New("acme/autocert: expired certificate") - } - if err := leaf.VerifyHostname(domain); err != nil { - return nil, err - } - // ensure the leaf corresponds to the private key - switch pub := leaf.PublicKey.(type) { - case *rsa.PublicKey: - prv, ok := key.(*rsa.PrivateKey) - if !ok { - return nil, errors.New("acme/autocert: private key type does not match public key type") - } - if pub.N.Cmp(prv.N) != 0 { - return nil, errors.New("acme/autocert: private key does not match public key") - } - case *ecdsa.PublicKey: - prv, ok := key.(*ecdsa.PrivateKey) - if !ok { - return nil, errors.New("acme/autocert: private key type does not match public key type") - } - if pub.X.Cmp(prv.X) != 0 || pub.Y.Cmp(prv.Y) != 0 { - return nil, errors.New("acme/autocert: private key does not match public key") - } - default: - return nil, errors.New("acme/autocert: unknown public key algorithm") - } - return leaf, nil -} - -func retryAfter(v string) time.Duration { - if i, err := strconv.Atoi(v); err == nil { - return time.Duration(i) * time.Second - } - if t, err := http.ParseTime(v); err == nil { - return t.Sub(timeNow()) - } - return time.Second -} - -type lockedMathRand struct { - sync.Mutex - rnd *mathrand.Rand -} - -func (r *lockedMathRand) int63n(max int64) int64 { - r.Lock() - n := r.rnd.Int63n(max) - r.Unlock() - return n -} - -// For easier testing. -var ( - timeNow = time.Now - - // Called when a state is removed. - testDidRemoveState = func(domain string) {} -) |