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Add SSO login support

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- Add [sso] config section with redirect_uri
- Create mcdsl/sso client when SSO is configured
- Add /login (landing page), /sso/redirect, /sso/callback routes
- Add /logout route
- Update login template with SSO landing page variant
- Bump mcdsl to v1.6.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Kyle Isom
2026-03-31 20:23:25 -07:00
parent ae4cc8b420
commit 647fd26e60
2619 changed files with 6833933 additions and 9 deletions
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219
vendor/git.wntrmute.dev/kyle/goutils/LICENSE vendored Normal file
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@@ -0,0 +1,219 @@
Copyright 2025 K. Isom <kyle@imap.cc>
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276
vendor/git.wntrmute.dev/kyle/goutils/certlib/certgen/config.go vendored Normal file
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package certgen
import (
"crypto"
"crypto/rand"
"crypto/x509"
"crypto/x509/pkix"
"fmt"
"math/big"
"net"
"slices"
"strings"
"time"
"git.wntrmute.dev/kyle/goutils/lib"
)
type KeySpec struct {
Algorithm string `yaml:"algorithm"`
Size int `yaml:"size"`
}
func (ks KeySpec) String() string {
if strings.ToLower(ks.Algorithm) == nameEd25519 {
return nameEd25519
}
return fmt.Sprintf("%s-%d", ks.Algorithm, ks.Size)
}
func (ks KeySpec) Generate() (crypto.PublicKey, crypto.PrivateKey, error) {
switch strings.ToLower(ks.Algorithm) {
case "rsa":
return GenerateKey(x509.RSA, ks.Size)
case "ecdsa":
return GenerateKey(x509.ECDSA, ks.Size)
case nameEd25519:
return GenerateKey(x509.Ed25519, 0)
default:
return nil, nil, fmt.Errorf("unknown key algorithm: %s", ks.Algorithm)
}
}
func (ks KeySpec) SigningAlgorithm() (x509.SignatureAlgorithm, error) {
switch strings.ToLower(ks.Algorithm) {
case "rsa":
return x509.SHA512WithRSAPSS, nil
case "ecdsa":
return x509.ECDSAWithSHA512, nil
case nameEd25519:
return x509.PureEd25519, nil
default:
return 0, fmt.Errorf("unknown key algorithm: %s", ks.Algorithm)
}
}
type Subject struct {
CommonName string `yaml:"common_name"`
Country string `yaml:"country"`
Locality string `yaml:"locality"`
Province string `yaml:"province"`
Organization string `yaml:"organization"`
OrganizationalUnit string `yaml:"organizational_unit"`
Email []string `yaml:"email"`
DNSNames []string `yaml:"dns"`
IPAddresses []string `yaml:"ips"`
}
type CertificateRequest struct {
KeySpec KeySpec `yaml:"key"`
Subject Subject `yaml:"subject"`
Profile Profile `yaml:"profile"`
}
func (cs CertificateRequest) Request(priv crypto.PrivateKey) (*x509.CertificateRequest, error) {
subject := pkix.Name{}
subject.CommonName = cs.Subject.CommonName
subject.Country = []string{cs.Subject.Country}
subject.Locality = []string{cs.Subject.Locality}
subject.Province = []string{cs.Subject.Province}
subject.Organization = []string{cs.Subject.Organization}
subject.OrganizationalUnit = []string{cs.Subject.OrganizationalUnit}
ipAddresses := make([]net.IP, 0, len(cs.Subject.IPAddresses))
for i, ip := range cs.Subject.IPAddresses {
ipAddresses = append(ipAddresses, net.ParseIP(ip))
if ipAddresses[i] == nil {
return nil, fmt.Errorf("invalid IP address: %s", ip)
}
}
dnsNames := cs.Subject.DNSNames
if isFQDN(cs.Subject.CommonName) && !slices.Contains(dnsNames, cs.Subject.CommonName) {
dnsNames = append(dnsNames, cs.Subject.CommonName)
}
req := &x509.CertificateRequest{
PublicKeyAlgorithm: 0,
PublicKey: getPublic(priv),
Subject: subject,
EmailAddresses: cs.Subject.Email,
DNSNames: dnsNames,
IPAddresses: ipAddresses,
}
reqBytes, err := x509.CreateCertificateRequest(rand.Reader, req, priv)
if err != nil {
return nil, fmt.Errorf("failed to create certificate request: %w", err)
}
req, err = x509.ParseCertificateRequest(reqBytes)
if err != nil {
return nil, fmt.Errorf("failed to parse certificate request: %w", err)
}
return req, nil
}
func (cs CertificateRequest) Generate() (crypto.PrivateKey, *x509.CertificateRequest, error) {
_, priv, err := cs.KeySpec.Generate()
if err != nil {
return nil, nil, err
}
req, err := cs.Request(priv)
if err != nil {
return nil, nil, err
}
return priv, req, nil
}
type Profile struct {
IsCA bool `yaml:"is_ca"`
PathLen int `yaml:"path_len"`
KeyUse []string `yaml:"key_uses"`
ExtKeyUsages []string `yaml:"ext_key_usages"`
Expiry string `yaml:"expiry"`
OCSPServer []string `yaml:"ocsp_server,omitempty"`
IssuingCertificateURL []string `yaml:"issuing_certificate_url,omitempty"`
}
func (p Profile) templateFromRequest(req *x509.CertificateRequest) (*x509.Certificate, error) {
serial, err := SerialNumber()
if err != nil {
return nil, fmt.Errorf("failed to generate serial number: %w", err)
}
expiry, err := lib.ParseDuration(p.Expiry)
if err != nil {
return nil, fmt.Errorf("parsing expiry: %w", err)
}
certTemplate := &x509.Certificate{
SignatureAlgorithm: req.SignatureAlgorithm,
PublicKeyAlgorithm: req.PublicKeyAlgorithm,
PublicKey: req.PublicKey,
SerialNumber: serial,
Subject: req.Subject,
NotBefore: time.Now().Add(-1 * time.Hour),
NotAfter: time.Now().Add(expiry),
BasicConstraintsValid: true,
IsCA: p.IsCA,
MaxPathLen: p.PathLen,
DNSNames: req.DNSNames,
IPAddresses: req.IPAddresses,
}
for _, sku := range p.KeyUse {
ku, ok := keyUsageStrings[sku]
if !ok {
return nil, fmt.Errorf("invalid key usage: %s", p.KeyUse)
}
certTemplate.KeyUsage |= ku
}
for _, extKeyUsage := range p.ExtKeyUsages {
eku, ok := extKeyUsageStrings[extKeyUsage]
if !ok {
return nil, fmt.Errorf("invalid extended key usage: %s", extKeyUsage)
}
certTemplate.ExtKeyUsage = append(certTemplate.ExtKeyUsage, eku)
}
if len(p.OCSPServer) > 0 {
certTemplate.OCSPServer = p.OCSPServer
}
if len(p.IssuingCertificateURL) > 0 {
certTemplate.IssuingCertificateURL = p.IssuingCertificateURL
}
return certTemplate, nil
}
func (p Profile) SignRequest(
parent *x509.Certificate,
req *x509.CertificateRequest,
priv crypto.PrivateKey,
) (*x509.Certificate, error) {
tpl, err := p.templateFromRequest(req)
if err != nil {
return nil, fmt.Errorf("failed to create certificate template: %w", err)
}
certBytes, err := x509.CreateCertificate(rand.Reader, tpl, parent, req.PublicKey, priv)
if err != nil {
return nil, fmt.Errorf("failed to create certificate: %w", err)
}
cert, err := x509.ParseCertificate(certBytes)
if err != nil {
return nil, fmt.Errorf("failed to parse certificate: %w", err)
}
return cert, nil
}
func (p Profile) SelfSign(req *x509.CertificateRequest, priv crypto.PrivateKey) (*x509.Certificate, error) {
certTemplate, err := p.templateFromRequest(req)
if err != nil {
return nil, fmt.Errorf("failed to create certificate template: %w", err)
}
return p.SignRequest(certTemplate, req, priv)
}
// isFQDN returns true if s looks like a fully-qualified domain name.
func isFQDN(s string) bool {
if s == "" {
return false
}
// Must contain at least one dot and no spaces.
if !strings.Contains(s, ".") || strings.ContainsAny(s, " \t") {
return false
}
// Each label must be non-empty and consist of letters, digits, or hyphens.
for label := range strings.SplitSeq(strings.TrimSuffix(s, "."), ".") {
if label == "" {
return false
}
for _, c := range label {
if !((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '-') {
return false
}
}
if label[0] == '-' || label[len(label)-1] == '-' {
return false
}
}
return true
}
func SerialNumber() (*big.Int, error) {
serialNumberBytes := make([]byte, 20)
_, err := rand.Read(serialNumberBytes)
if err != nil {
return nil, fmt.Errorf("failed to generate serial number: %w", err)
}
return new(big.Int).SetBytes(serialNumberBytes), nil
}
// GenerateSelfSigned generates a self-signed certificate using the given certificate request.
func GenerateSelfSigned(creq *CertificateRequest) (*x509.Certificate, crypto.PrivateKey, error) {
priv, req, err := creq.Generate()
if err != nil {
return nil, nil, fmt.Errorf("failed to generate certificate request: %w", err)
}
cert, err := creq.Profile.SelfSign(req, priv)
if err != nil {
return nil, nil, fmt.Errorf("failed to self-sign certificate: %w", err)
}
return cert, priv, nil
}

90
vendor/git.wntrmute.dev/kyle/goutils/certlib/certgen/keygen.go vendored Normal file
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package certgen
import (
"crypto"
"crypto/ecdsa"
"crypto/ed25519"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"errors"
"fmt"
)
// var (
// oidEd25519 = asn1.ObjectIdentifier{1, 3, 101, 110}
//)
const (
nameEd25519 = "ed25519"
)
func GenerateKey(algorithm x509.PublicKeyAlgorithm, bitSize int) (crypto.PublicKey, crypto.PrivateKey, error) {
var key crypto.PrivateKey
var pub crypto.PublicKey
var err error
switch algorithm {
case x509.Ed25519:
pub, key, err = ed25519.GenerateKey(rand.Reader)
case x509.RSA:
key, err = rsa.GenerateKey(rand.Reader, bitSize)
if err == nil {
rsaPriv, ok := key.(*rsa.PrivateKey)
if !ok {
panic("failed to cast RSA private key to *rsa.PrivateKey")
}
pub = rsaPriv.Public()
}
case x509.ECDSA:
var curve elliptic.Curve
switch bitSize {
case 256:
curve = elliptic.P256()
case 384:
curve = elliptic.P384()
case 521:
curve = elliptic.P521()
default:
return nil, nil, fmt.Errorf("unsupported curve size %d", bitSize)
}
key, err = ecdsa.GenerateKey(curve, rand.Reader)
if err == nil {
ecPriv, ok := key.(*ecdsa.PrivateKey)
if !ok {
panic("failed to cast ECDSA private key to *ecdsa.PrivateKey")
}
pub = ecPriv.Public()
}
case x509.DSA:
fallthrough
case x509.UnknownPublicKeyAlgorithm:
fallthrough
default:
err = errors.New("unsupported algorithm")
}
if err != nil {
return nil, nil, err
}
return pub, key, nil
}
func getPublic(priv crypto.PrivateKey) crypto.PublicKey {
switch priv := priv.(type) {
case *rsa.PrivateKey:
return &priv.PublicKey
case *ecdsa.PrivateKey:
return &priv.PublicKey
case *ed25519.PrivateKey:
return priv.Public()
default:
return nil
}
}

32
vendor/git.wntrmute.dev/kyle/goutils/certlib/certgen/ku.go vendored Normal file
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package certgen
import "crypto/x509"
var keyUsageStrings = map[string]x509.KeyUsage{
"signing": x509.KeyUsageDigitalSignature,
"digital signature": x509.KeyUsageDigitalSignature,
"content commitment": x509.KeyUsageContentCommitment,
"key encipherment": x509.KeyUsageKeyEncipherment,
"key agreement": x509.KeyUsageKeyAgreement,
"data encipherment": x509.KeyUsageDataEncipherment,
"cert sign": x509.KeyUsageCertSign,
"crl sign": x509.KeyUsageCRLSign,
"encipher only": x509.KeyUsageEncipherOnly,
"decipher only": x509.KeyUsageDecipherOnly,
}
var extKeyUsageStrings = map[string]x509.ExtKeyUsage{
"any": x509.ExtKeyUsageAny,
"server auth": x509.ExtKeyUsageServerAuth,
"client auth": x509.ExtKeyUsageClientAuth,
"code signing": x509.ExtKeyUsageCodeSigning,
"email protection": x509.ExtKeyUsageEmailProtection,
"s/mime": x509.ExtKeyUsageEmailProtection,
"ipsec end system": x509.ExtKeyUsageIPSECEndSystem,
"ipsec tunnel": x509.ExtKeyUsageIPSECTunnel,
"ipsec user": x509.ExtKeyUsageIPSECUser,
"timestamping": x509.ExtKeyUsageTimeStamping,
"ocsp signing": x509.ExtKeyUsageOCSPSigning,
"microsoft sgc": x509.ExtKeyUsageMicrosoftServerGatedCrypto,
"netscape sgc": x509.ExtKeyUsageNetscapeServerGatedCrypto,
}

21
vendor/git.wntrmute.dev/kyle/goutils/lib/defs.go vendored Normal file
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package lib
// Various constants used throughout the tools.
const (
// ExitSuccess is the successful exit status.
//
// It should be called on successful exit.
ExitSuccess = 0
// ExitFailure is the failing exit status.
ExitFailure = 1
)
const (
OneTrueDateFormat = "2006-01-02T15:04:05-0700"
DateShortFormat = "2006-01-02"
TimeShortFormat = "15:04:05"
TimeShorterFormat = "15:04"
TimeStandardDateTime = "2006-01-02 15:04"
)

37
vendor/git.wntrmute.dev/kyle/goutils/lib/ftime_bsd.go vendored Normal file
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//go:build bsd
package lib
import (
"time"
"golang.org/x/sys/unix"
)
// FileTime contains the changed, modified, and accessed timestamps
// for a file.
type FileTime struct {
Changed time.Time
Modified time.Time
Accessed time.Time
}
func timeSpecToTime(ts unix.Timespec) time.Time {
return time.Unix(ts.Sec, ts.Nsec)
}
// LoadFileTime returns a FileTime associated with the file.
func LoadFileTime(path string) (FileTime, error) {
var ft = FileTime{}
var st = unix.Stat_t{}
err := unix.Stat(path, &st)
if err != nil {
return ft, err
}
ft.Changed = timeSpecToTime(st.Ctimespec)
ft.Modified = timeSpecToTime(st.Mtimespec)
ft.Accessed = timeSpecToTime(st.Atimespec)
return ft, nil
}

38
vendor/git.wntrmute.dev/kyle/goutils/lib/ftime_unix.go vendored Normal file
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//go:build unix || linux || openbsd || (darwin && amd64)
package lib
import (
"time"
"golang.org/x/sys/unix"
)
// FileTime contains the changed, modified, and accessed timestamps
// for a file.
type FileTime struct {
Changed time.Time
Modified time.Time
Accessed time.Time
}
func timeSpecToTime(ts unix.Timespec) time.Time {
// The casts to int64 are needed because on 386, these are int32s.
return time.Unix(ts.Sec, ts.Nsec)
}
// LoadFileTime returns a FileTime associated with the file.
func LoadFileTime(path string) (FileTime, error) {
var ft = FileTime{}
var st = unix.Stat_t{}
err := unix.Stat(path, &st)
if err != nil {
return ft, err
}
ft.Changed = timeSpecToTime(st.Ctim)
ft.Modified = timeSpecToTime(st.Mtim)
ft.Accessed = timeSpecToTime(st.Atim)
return ft, nil
}

349
vendor/git.wntrmute.dev/kyle/goutils/lib/lib.go vendored Normal file
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package lib
import (
"encoding/base64"
"encoding/hex"
"errors"
"fmt"
"io"
"os"
"path/filepath"
"strconv"
"strings"
"time"
)
var progname = filepath.Base(os.Args[0])
const (
daysInYear = 365
digitWidth = 10
hoursInQuarterDay = 6
)
// ProgName returns what lib thinks the program name is, namely the
// basename of argv0.
//
// It is similar to the Linux __progname function.
func ProgName() string {
return progname
}
// Warnx displays a formatted error message to standard error, à la
// warnx(3).
func Warnx(format string, a ...any) (int, error) {
format = fmt.Sprintf("[%s] %s", progname, format)
format += "\n"
return fmt.Fprintf(os.Stderr, format, a...)
}
// Warn displays a formatted error message to standard output,
// appending the error string, à la warn(3).
func Warn(err error, format string, a ...any) (int, error) {
format = fmt.Sprintf("[%s] %s", progname, format)
format += ": %v\n"
a = append(a, err)
return fmt.Fprintf(os.Stderr, format, a...)
}
// Errx displays a formatted error message to standard error and exits
// with the status code from `exit`, à la errx(3).
func Errx(exit int, format string, a ...any) {
format = fmt.Sprintf("[%s] %s", progname, format)
format += "\n"
fmt.Fprintf(os.Stderr, format, a...)
os.Exit(exit)
}
// Err displays a formatting error message to standard error,
// appending the error string, and exits with the status code from
// `exit`, à la err(3).
func Err(exit int, err error, format string, a ...any) {
format = fmt.Sprintf("[%s] %s", progname, format)
format += ": %v\n"
a = append(a, err)
fmt.Fprintf(os.Stderr, format, a...)
os.Exit(exit)
}
// Itoa provides cheap integer to fixed-width decimal ASCII. Give a
// negative width to avoid zero-padding. Adapted from the 'itoa'
// function in the log/log.go file in the standard library.
func Itoa(i int, wid int) string {
// Assemble decimal in reverse order.
var b [20]byte
bp := len(b) - 1
for i >= digitWidth || wid > 1 {
wid--
q := i / digitWidth
b[bp] = byte('0' + i - q*digitWidth)
bp--
i = q
}
b[bp] = byte('0' + i)
return string(b[bp:])
}
var (
dayDuration = 24 * time.Hour
yearDuration = (daysInYear * dayDuration) + (hoursInQuarterDay * time.Hour)
)
// Duration returns a prettier string for time.Durations.
func Duration(d time.Duration) string {
var s string
if d >= yearDuration {
years := int64(d / yearDuration)
s += fmt.Sprintf("%dy", years)
d -= time.Duration(years) * yearDuration
}
if d >= dayDuration {
days := d / dayDuration
s += fmt.Sprintf("%dd", days)
}
if s != "" {
return s
}
d %= 1 * time.Second
hours := int64(d / time.Hour)
d -= time.Duration(hours) * time.Hour
s += fmt.Sprintf("%dh%s", hours, d)
return s
}
// IsDigit checks if a byte is a decimal digit.
func IsDigit(b byte) bool {
return b >= '0' && b <= '9'
}
const signedaMask64 = 1<<63 - 1
// ParseDuration parses a duration string into a time.Duration.
// It supports standard units (ns, us/µs, ms, s, m, h) plus extended units:
// d (days, 24h), w (weeks, 7d), y (years, 365d).
// Units can be combined without spaces, e.g., "1y2w3d4h5m6s".
// Case-insensitive. Years and days are approximations (no leap seconds/months).
// Returns an error for invalid input.
func ParseDuration(s string) (time.Duration, error) {
s = strings.ToLower(s) // Normalize to lowercase for case-insensitivity.
if s == "" {
return 0, errors.New("empty duration string")
}
var total time.Duration
i := 0
for i < len(s) {
// Parse the number part.
start := i
for i < len(s) && IsDigit(s[i]) {
i++
}
if start == i {
return 0, fmt.Errorf("expected number at position %d", start)
}
numStr := s[start:i]
num, err := strconv.ParseUint(numStr, 10, 64)
if err != nil {
return 0, fmt.Errorf("invalid number %q: %w", numStr, err)
}
// Parse the unit part.
if i >= len(s) {
return 0, fmt.Errorf("expected unit after number %q", numStr)
}
unitStart := i
i++ // Consume the first char of the unit.
unit := s[unitStart:i]
// Handle potential two-char units like "ms".
if unit == "m" && i < len(s) && s[i] == 's' {
i++ // Consume the 's'.
unit = "ms"
}
// Convert to duration based on unit.
var d time.Duration
switch unit {
case "ns":
d = time.Nanosecond * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "us", "µs":
d = time.Microsecond * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "ms":
d = time.Millisecond * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "s":
d = time.Second * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "m":
d = time.Minute * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "h":
d = time.Hour * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "d":
d = 24 * time.Hour * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "w":
d = 7 * 24 * time.Hour * time.Duration(num&signedaMask64) // #nosec G115 - masked off
case "y":
// Approximate, non-leap year.
d = 365 * 24 * time.Hour * time.Duration(num&signedaMask64) // #nosec G115 - masked off;
default:
return 0, fmt.Errorf("unknown unit %q at position %d", s[unitStart:i], unitStart)
}
total += d
}
return total, nil
}
type HexEncodeMode uint8
const (
// HexEncodeLower prints the bytes as lowercase hexadecimal.
HexEncodeLower HexEncodeMode = iota + 1
// HexEncodeUpper prints the bytes as uppercase hexadecimal.
HexEncodeUpper
// HexEncodeLowerColon prints the bytes as lowercase hexadecimal
// with colons between each pair of bytes.
HexEncodeLowerColon
// HexEncodeUpperColon prints the bytes as uppercase hexadecimal
// with colons between each pair of bytes.
HexEncodeUpperColon
// HexEncodeBytes prints the string as a sequence of []byte.
HexEncodeBytes
// HexEncodeBase64 prints the string as a base64-encoded string.
HexEncodeBase64
)
func (m HexEncodeMode) String() string {
switch m {
case HexEncodeLower:
return "lower"
case HexEncodeUpper:
return "upper"
case HexEncodeLowerColon:
return "lcolon"
case HexEncodeUpperColon:
return "ucolon"
case HexEncodeBytes:
return "bytes"
case HexEncodeBase64:
return "base64"
default:
panic("invalid hex encode mode")
}
}
func ParseHexEncodeMode(s string) HexEncodeMode {
switch strings.ToLower(s) {
case "lower":
return HexEncodeLower
case "upper":
return HexEncodeUpper
case "lcolon":
return HexEncodeLowerColon
case "ucolon":
return HexEncodeUpperColon
case "bytes":
return HexEncodeBytes
case "base64":
return HexEncodeBase64
}
panic("invalid hex encode mode")
}
func hexColons(s string) string {
if len(s)%2 != 0 {
fmt.Fprintf(os.Stderr, "hex string: %s\n", s)
fmt.Fprintf(os.Stderr, "hex length: %d\n", len(s))
panic("invalid hex string length")
}
n := len(s)
if n <= 2 {
return s
}
pairCount := n / 2
if n%2 != 0 {
pairCount++
}
var b strings.Builder
b.Grow(n + pairCount - 1)
for i := 0; i < n; i += 2 {
b.WriteByte(s[i])
if i+1 < n {
b.WriteByte(s[i+1])
}
if i+2 < n {
b.WriteByte(':')
}
}
return b.String()
}
func hexEncode(b []byte) string {
s := hex.EncodeToString(b)
if len(s)%2 != 0 {
s = "0" + s
}
return s
}
func bytesAsByteSliceString(buf []byte) string {
sb := &strings.Builder{}
sb.WriteString("[]byte{")
for i := range buf {
fmt.Fprintf(sb, "0x%02x, ", buf[i])
}
sb.WriteString("}")
return sb.String()
}
// HexEncode encodes the given bytes as a hexadecimal string. It
// also supports a few other binary-encoding formats as well.
func HexEncode(b []byte, mode HexEncodeMode) string {
switch mode {
case HexEncodeLower:
return hexEncode(b)
case HexEncodeUpper:
return strings.ToUpper(hexEncode(b))
case HexEncodeLowerColon:
return hexColons(hexEncode(b))
case HexEncodeUpperColon:
return strings.ToUpper(hexColons(hexEncode(b)))
case HexEncodeBytes:
return bytesAsByteSliceString(b)
case HexEncodeBase64:
return base64.StdEncoding.EncodeToString(b)
default:
panic("invalid hex encode mode")
}
}
// DummyWriteCloser wraps an io.Writer in a struct with a no-op Close.
type DummyWriteCloser struct {
w io.Writer
}
func WithCloser(w io.Writer) io.WriteCloser {
return &DummyWriteCloser{w: w}
}
func (dwc *DummyWriteCloser) Write(p []byte) (int, error) {
return dwc.w.Write(p)
}
func (dwc *DummyWriteCloser) Close() error {
return nil
}