Update dependencies

vendor/git.autistici.org/ai3/go-common/pwhash/password.go

@@ -15,7 +15,8 @@ import (
 	"golang.org/x/crypto/scrypt"
 )
 
-// PasswordHash is a convenience interface common to all types in this package.
+// PasswordHash is the interface for a password hashing algorithm
+// implementation.
 type PasswordHash interface {
 	// ComparePassword returns true if the given password matches
 	// the encrypted one.
@@ -25,12 +26,20 @@ type PasswordHash interface {
 	Encrypt(string) string
 }
 
-// SystemCryptPasswordHash uses the glibc crypt function.
-type SystemCryptPasswordHash struct{}
+// systemCryptPasswordHash uses the glibc crypt function.
+type systemCryptPasswordHash struct {
+	hashStr string
+}
+
+// NewSystemCrypt returns a PasswordHash that uses the system crypt(3)
+// function, specifically glibc with its SHA512 algorithm.
+func NewSystemCrypt() PasswordHash {
+	return &systemCryptPasswordHash{"$6$"}
+}
 
 // ComparePassword returns true if the given password matches the
 // encrypted one.
-func (s *SystemCryptPasswordHash) ComparePassword(encrypted, password string) bool {
+func (s *systemCryptPasswordHash) ComparePassword(encrypted, password string) bool {
 	enc2, err := crypt.Crypt(password, encrypted)
 	if err != nil {
 		return false
@@ -39,8 +48,8 @@ func (s *SystemCryptPasswordHash) ComparePassword(encrypted, password string) bo
 }
 
 // Encrypt the given password using glibc crypt.
-func (s *SystemCryptPasswordHash) Encrypt(password string) string {
-	salt := fmt.Sprintf("$6$%x$", getRandomBytes(16))
+func (s *systemCryptPasswordHash) Encrypt(password string) string {
+	salt := fmt.Sprintf("%s%x$", s.hashStr, getRandomBytes(16))
 	enc, err := crypt.Crypt(password, salt)
 	if err != nil {
 		panic(err)
@@ -54,28 +63,48 @@ var (
 )
 
 // Argon2PasswordHash uses the Argon2 hashing algorithm.
-type Argon2PasswordHash struct{}
+type argon2PasswordHash struct {
+	// Encoding parameters.
+	params argon2Params
+}
+
+// NewArgon2 returns an Argon2i-based PasswordHash using the default parameters.
+func NewArgon2() PasswordHash {
+	return NewArgon2WithParams(
+		defaultArgon2Params.Time,
+		defaultArgon2Params.Memory,
+		defaultArgon2Params.Threads,
+	)
+}
+
+// NewArgon2WithParams returns an Argon2i-based PasswordHash using the
+// specified parameters for time, memory, and number of threads.
+func NewArgon2WithParams(time, mem uint32, threads uint8) PasswordHash {
+	return &argon2PasswordHash{
+		params: argon2Params{
+			Time:    time,
+			Memory:  mem,
+			Threads: threads,
+		},
+	}
+}
 
 // ComparePassword returns true if the given password matches the
 // encrypted one.
-func (s *Argon2PasswordHash) ComparePassword(encrypted, password string) bool {
+func (s *argon2PasswordHash) ComparePassword(encrypted, password string) bool {
 	params, salt, dk, err := decodeArgon2Hash(encrypted)
 	if err != nil {
 		return false
 	}
 	dk2 := argon2.Key([]byte(password), salt, params.Time, params.Memory, params.Threads, argonKeyLen)
-	//log.Printf("params=%+v, salt=%+v, dk=%v, dk2=%v", params, salt, dk, dk2)
 	return subtle.ConstantTimeCompare(dk, dk2) == 1
 }
 
 // Encrypt the given password with the Argon2 algorithm.
-func (s *Argon2PasswordHash) Encrypt(password string) string {
+func (s *argon2PasswordHash) Encrypt(password string) string {
 	salt := getRandomBytes(argonSaltLen)
-	params := defaultArgon2Params
-
-	dk := argon2.Key([]byte(password), salt, params.Time, params.Memory, params.Threads, argonKeyLen)
-
-	return encodeArgon2Hash(params, salt, dk)
+	dk := argon2.Key([]byte(password), salt, s.params.Time, s.params.Memory, s.params.Threads, argonKeyLen)
+	return encodeArgon2Hash(s.params, salt, dk)
 }
 
 type argon2Params struct {
@@ -84,13 +113,12 @@ type argon2Params struct {
 	Threads uint8
 }
 
+// Default Argon2 parameters are tuned for a high-traffic
+// authentication service (<1ms per operation).
 var defaultArgon2Params = argon2Params{
-	Time:    4,
-	Memory:  32 * 1024,
-	Threads: 1,
-
-	// Test fails with threads > 1 !!
-	//Threads: uint8(runtime.NumCPU()),
+	Time:    1,
+	Memory:  4 * 1024,
+	Threads: 4,
 }
 
 func encodeArgon2Hash(params argon2Params, salt, dk []byte) string {
@@ -139,11 +167,35 @@ var (
 )
 
 // ScryptPasswordHash uses the scrypt hashing algorithm.
-type ScryptPasswordHash struct{}
+type scryptPasswordHash struct {
+	params scryptParams
+}
+
+// NewScrypt returns a PasswordHash that uses the scrypt algorithm
+// with the default parameters.
+func NewScrypt() PasswordHash {
+	return NewScryptWithParams(
+		defaultScryptParams.N,
+		defaultScryptParams.R,
+		defaultScryptParams.P,
+	)
+}
+
+// NewScryptWithParams returns a PasswordHash that uses the scrypt
+// algorithm with the specified parameters.
+func NewScryptWithParams(n, r, p int) PasswordHash {
+	return &scryptPasswordHash{
+		params: scryptParams{
+			N: n,
+			R: r,
+			P: p,
+		},
+	}
+}
 
 // ComparePassword returns true if the given password matches
 // the encrypted one.
-func (s *ScryptPasswordHash) ComparePassword(encrypted, password string) bool {
+func (s *scryptPasswordHash) ComparePassword(encrypted, password string) bool {
 	params, salt, dk, err := decodeScryptHash(encrypted)
 	if err != nil {
 		return false
@@ -152,21 +204,19 @@ func (s *ScryptPasswordHash) ComparePassword(encrypted, password string) bool {
 	if err != nil {
 		return false
 	}
-	//log.Printf("params=%+v, salt=%+v, dk=%v, dk2=%v", params, salt, dk, dk2)
 	return subtle.ConstantTimeCompare(dk, dk2) == 1
 }
 
 // Encrypt the given password with the scrypt algorithm.
-func (s *ScryptPasswordHash) Encrypt(password string) string {
+func (s *scryptPasswordHash) Encrypt(password string) string {
 	salt := getRandomBytes(scryptSaltLen)
-	params := defaultScryptParams
 
-	dk, err := scrypt.Key([]byte(password), salt, params.N, params.R, params.P, scryptKeyLen)
+	dk, err := scrypt.Key([]byte(password), salt, s.params.N, s.params.R, s.params.P, scryptKeyLen)
 	if err != nil {
 		panic(err)
 	}
 
-	return encodeScryptHash(params, salt, dk)
+	return encodeScryptHash(s.params, salt, dk)
 }
 
 type scryptParams struct {
@@ -224,12 +274,13 @@ func getRandomBytes(n int) []byte {
 	return b
 }
 
+// A registry of default handlers for decoding passwords.
 var prefixRegistry = map[string]PasswordHash{
-	"$1$":  &SystemCryptPasswordHash{},
-	"$5$":  &SystemCryptPasswordHash{},
-	"$6$":  &SystemCryptPasswordHash{},
-	"$s$":  &ScryptPasswordHash{},
-	"$a2$": &Argon2PasswordHash{},
+	"$1$":  NewSystemCrypt(),
+	"$5$":  NewSystemCrypt(),
+	"$6$":  NewSystemCrypt(),
+	"$s$":  NewScrypt(),
+	"$a2$": NewArgon2(),
 }
 
 // ComparePassword returns true if the given password matches the
@@ -245,7 +296,11 @@ func ComparePassword(encrypted, password string) bool {
 
 // DefaultEncryptAlgorithm is used by the Encrypt function to encrypt
 // passwords.
-var DefaultEncryptAlgorithm PasswordHash = &Argon2PasswordHash{}
+var DefaultEncryptAlgorithm PasswordHash
+
+func init() {
+	DefaultEncryptAlgorithm = NewArgon2()
+}
 
 // Encrypt will encrypt a password with the default algorithm.
 func Encrypt(password string) string {

vendor/git.autistici.org/ai3/go-common/serverutil/http.go

@@ -13,6 +13,7 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/coreos/go-systemd/daemon"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
@@ -82,7 +83,8 @@ func Serve(h http.Handler, config *ServerConfig, addr string) error {
 		return err
 	}
 
-	// Create the net.Listener, then notify systemd that we are ready to serve.
+	// Create the net.Listener first, so we can detect
+	// initialization-time errors safely.
 	l, err := net.Listen("tcp", addr)
 	if err != nil {
 		return err
@@ -113,6 +115,9 @@ func Serve(h http.Handler, config *ServerConfig, addr string) error {
 
 	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
 
+	// Notify systemd that we are ready to serve.
+	daemon.SdNotify(false, "READY=1")
+
 	err = srv.Serve(l)
 	if err != http.ErrServerClosed {
 		return err

vendor/git.autistici.org/ai3/go-common/userenckey/container.go

+package userenckey
+
+import (
+	"bytes"
+	"crypto/rand"
+	"errors"
+	"io"
+
+	"github.com/lunixbochs/struc"
+	"github.com/miscreant/miscreant/go"
+	"golang.org/x/crypto/argon2"
+)
+
+// Current algorithm: Argon2 KDF + AES-SIV key encryption.
+const algoArgon2AESSIV = 1
+
+const aeadAlgo = "AES-SIV"
+
+// Struct members have stupid names to reduce the size of the resulting gob!
+type argon2Params struct {
+	Time    uint32 `struc:"uint32,little"`
+	Memory  uint32 `struc:"uint32,little"`
+	Threads uint8  `struc:"uint8"`
+}
+
+// Default Argon2 parameters are tuned for a high-traffic
+// authentication service (<1ms per operation).
+var defaultArgon2Params = argon2Params{
+	Time:    1,
+	Memory:  4 * 1024,
+	Threads: 4,
+}
+
+const (
+	keyLen  = 64
+	saltLen = 32
+)
+
+func argon2KDF(params argon2Params, salt, pw []byte) []byte {
+	return argon2.Key(pw, salt, params.Time, params.Memory, params.Threads, keyLen)
+}
+
+// An encrypted container stores an opaque blob of binary data along
+// with metadata about the encryption itself, to allow for a
+// controlled amount of algorithm malleability accounting for future
+// updates. The structure is binary-packed (as opposed to using higher
+// level serializations such as encoding/gob) because we'd like to be
+// able to read it from other languages if necessary.
+type container struct { // nolint: maligned
+	Algo    uint8 `struc:"uint8"`
+	Params  argon2Params
+	SaltLen uint8 `struc:"uint8,sizeof=Salt"`
+	Salt    []byte
+	DataLen uint16 `struc:"uint16,little,sizeof=Data"`
+	Data    []byte
+}
+
+// Convert to an opaque encoded ("wire") representation.
+func (c *container) Marshal() ([]byte, error) {
+	var buf bytes.Buffer
+	err := struc.Pack(&buf, c)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+// Parse a key object from the wire representation.
+func unmarshalContainer(b []byte) (c container, err error) {
+	err = struc.Unpack(bytes.NewReader(b), &c)
+	return
+}
+
+func newContainer(data, pw []byte) (container, error) {
+	return encryptArgon2AESSIV(data, pw)
+}
+
+func (c container) decrypt(pw []byte) ([]byte, error) {
+	// Only one supported kdf/algo combination right now.
+	if c.Algo == algoArgon2AESSIV {
+		return c.decryptArgon2AESSIV(pw)
+	}
+	return nil, errors.New("unsupported algo")
+}
+
+func (c container) decryptArgon2AESSIV(pw []byte) ([]byte, error) {
+	// Run the KDF and create the AEAD cipher.
+	dk := argon2KDF(c.Params, c.Salt, pw)
+	cipher, err := miscreant.NewAEAD(aeadAlgo, dk, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	// Decrypt the data and obtain the DER-encoded private key.
+	dec, err := cipher.Open(nil, nil, c.Data, nil)
+	return dec, err
+}
+
+func encryptArgon2AESSIV(data, pw []byte) (container, error) {
+	c := container{
+		Algo:   algoArgon2AESSIV,
+		Params: defaultArgon2Params,
+		Salt:   genRandomSalt(),
+	}
+
+	// Run the KDF and create the AEAD cipher.
+	dk := argon2KDF(c.Params, c.Salt, pw)
+	cipher, err := miscreant.NewAEAD(aeadAlgo, dk, 0)
+	if err != nil {
+		return container{}, err
+	}
+
+	// Encrypt the data (a DER-encoded ECDSA private key).
+	c.Data = cipher.Seal(nil, nil, data, nil)
+	return c, nil
+}
+
+func genRandomSalt() []byte {
+	var b [saltLen]byte
+	if _, err := io.ReadFull(rand.Reader, b[:]); err != nil {
+		panic(err)
+	}
+	return b[:]
+}

vendor/git.autistici.org/ai3/go-common/userenckey/key.go

+package userenckey
+
+import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+// ErrBadPassword is returned on decryption failure.
+var ErrBadPassword = errors.New("could not decrypt key with password")
+
+func encodePublicKeyToPEM(pub *ecdsa.PublicKey) ([]byte, error) {
+	der, err := x509.MarshalPKIXPublicKey(pub)
+	if err != nil {
+		return nil, err
+	}
+	return pem.EncodeToMemory(&pem.Block{Type: "PUBLIC KEY", Bytes: der}), nil
+}
+
+// Key (unencrypted).
+type Key struct {
+	rawBytes []byte
+}
+
+// GenerateKey generates a new ECDSA key pair, and returns the
+// PEM-encoded public and private key (in order).
+func GenerateKey() ([]byte, *Key, error) {
+	priv, err := ecdsa.GenerateKey(elliptic.P224(), rand.Reader)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	//privBytes, err := encodePrivateKeyToPEM(priv)
+	privBytes, err := x509.MarshalECPrivateKey(priv)
+	if err != nil {
+		return nil, nil, err
+	}
+	pubBytes, err := encodePublicKeyToPEM(&priv.PublicKey)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return pubBytes, &Key{privBytes}, nil
+}
+
+// PEM returns the key in PEM-encoded format.
+func (k *Key) PEM() ([]byte, error) {
+	// Parse the ASN.1 data and encode it with PKCS8 (in PEM format).
+	priv, err := k.PrivateKey()
+	if err != nil {
+		return nil, err
+	}
+
+	return encodePrivateKeyToPEM(priv)
+}
+
+// PrivateKey parses the DER-encoded ASN.1 data in Key and returns the
+// private key object.
+func (k *Key) PrivateKey() (*ecdsa.PrivateKey, error) {
+	return x509.ParseECPrivateKey(k.rawBytes)
+}
+
+// Encrypt a key with a password and a random salt.
+func Encrypt(key *Key, pw []byte) ([]byte, error) {
+	c, err := newContainer(key.rawBytes, pw)
+	if err != nil {
+		return nil, err
+	}
+	return c.Marshal()
+}
+
+// Decrypt one out of multiple keys with the specified password. The
+// keys share the same cleartext, but have been encrypted with
+// different passwords.
+func Decrypt(encKeys [][]byte, pw []byte) (*Key, error) {
+	for _, encKey := range encKeys {
+		c, err := unmarshalContainer(encKey)
+		if err != nil {
+			//log.Printf("parse error: %v", err)
+			continue
+		}
+		if dec, err := c.decrypt(pw); err == nil {
+			return &Key{dec}, nil
+		}
+	}
+	return nil, ErrBadPassword
+}

vendor/git.autistici.org/ai3/go-common/userenckey/pkcs8.go

+// +build go1.10
+
+package userenckey
+
+import (
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/pem"
+)
+
+// Encode a private key to PEM-encoded PKCS8.
+func encodePrivateKeyToPEM(priv *ecdsa.PrivateKey) ([]byte, error) {
+	der, err := x509.MarshalPKCS8PrivateKey(priv)
+	if err != nil {
+		return nil, err
+	}
+	return pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: der}), nil
+}

vendor/git.autistici.org/ai3/go-common/userenckey/pkcs8_compat.go

+// +build !go1.10
+
+package userenckey
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/pem"
+	"os/exec"
+)
+
+// Encode a private key to PEM-encoded PKCS8.
+//
+// In Go versions prior to 1.10, we must shell out to openssl to
+// convert the private key to PKCS8 format.
+func encodePrivateKeyToPEM(priv *ecdsa.PrivateKey) ([]byte, error) {
+	der, err := x509.MarshalECPrivateKey(priv)
+	if err != nil {
+		return nil, err
+	}
+	pkcs1 := pem.EncodeToMemory(&pem.Block{Type: "EC PRIVATE KEY", Bytes: der})
+
+	/* #nosec */
+	cmd := exec.Command("/usr/bin/openssl", "pkey")
+	cmd.Stdin = bytes.NewReader(pkcs1)
+	return cmd.Output()
+}

vendor/github.com/boombuler/barcode/README.md

-[![Join the chat at https://gitter.im/golang-barcode/Lobby](https://badges.gitter.im/golang-barcode/Lobby.svg)](https://gitter.im/golang-barcode/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
 ## Introduction ##
-
 This is a package for GO which can be used to create different types of barcodes.
 
 ## Supported Barcode Types ##

vendor/github.com/lunixbochs/struc/LICENSE

+Copyright (c) 2015 Ryan Hileman
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/lunixbochs/struc/README.md

+[![Build Status](https://travis-ci.org/lunixbochs/struc.svg?branch=master)](https://travis-ci.org/lunixbochs/struc)
+
+struc
+====
+
+Struc exists to pack and unpack C-style structures from bytes, which is useful for binary files and network protocols. It could be considered an alternative to `encoding/binary`, which requires massive boilerplate for some similar operations.
+
+Take a look at an [example comparing `struc` and `encoding/binary`](https://bochs.info/p/cxvm9)
+
+Struc considers usability first. That said, it does cache reflection data and aims to be competitive with `encoding/binary` struct packing in every way, including performance.
+
+Example struct
+----
+
+```Go
+type Example struct {
+    Var   int `struc:"int32,sizeof=Str"`
+    Str   string
+    Weird []byte `struc:"[8]int64"`
+    Var   []int `struc:"[]int32,little"`
+}
+```
+
+Struct tag format
+----
+
+ - ```Var []int `struc:"[]int32,little,sizeof=StringField"` ``` will pack Var as a slice of little-endian int32, and link it as the size of `StringField`.
+ - `sizeof=`: Indicates this field is a number used to track the length of a another field. `sizeof` fields are automatically updated on `Pack()` based on the current length of the tracked field, and are used to size the target field during `Unpack()`.
+ - Bare values will be parsed as type and endianness.
+
+Endian formats
+----
+
+ - `big` (default)
+ - `little`
+
+Recognized types
+----
+
+ - `pad` - this type ignores field contents and is backed by a `[length]byte` containing nulls
+ - `bool`
+ - `byte`
+ - `int8`, `uint8`
+ - `int16`, `uint16`
+ - `int32`, `uint32`
+ - `int64`, `uint64`
+ - `float32`
+ - `float64`
+
+Types can be indicated as arrays/slices using `[]` syntax. Example: `[]int64`, `[8]int32`.
+
+Bare slice types (those with no `[size]`) must have a linked `Sizeof` field.
+
+Private fields are ignored when packing and unpacking.
+
+Example code
+----
+
+```Go
+package main
+