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secret.go
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secret.go
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package model
import (
"bytes"
"encoding/base64"
"fmt"
)
// Don't scrub secrets less than 5 characters,
// to avoid weird behavior where we scrub too much
// https://app.clubhouse.io/windmill/story/3568/small-secrets-lead-to-weird-behavior
const minSecretLengthToScrub = 5
// Secrets are different than other kinds of build/deploy outputs.
//
// Once something is marked as a secret, we want to scrub it from all logs
// until the user quits Tilt. Removing the secret from the Kubernetes cluster
// doesn't suddenly "reveal" the secret.
type SecretSet map[string]Secret
func (s SecretSet) AddAll(other SecretSet) {
for key, val := range other {
s[key] = val
}
}
func (s SecretSet) AddSecret(name string, key string, value []byte) {
v := string(value)
valueEncoded := base64.StdEncoding.EncodeToString(value)
s[v] = Secret{
Name: name,
Key: key,
Value: value,
ValueEncoded: []byte(valueEncoded),
Replacement: []byte(fmt.Sprintf("[redacted secret %s:%s]", name, key)),
}
}
func (s SecretSet) Scrub(text []byte) []byte {
for _, secret := range s {
text = secret.Scrub(text)
}
return text
}
type Secret struct {
// The name of the secret in the kubernetes cluster, so the user
// can look it up themselves.
Name string
Key string
Value []byte
ValueEncoded []byte
Replacement []byte
}
func (s Secret) Scrub(text []byte) []byte {
if len(s.Value) < minSecretLengthToScrub {
return text
}
if bytes.Contains(text, s.Value) {
text = bytes.ReplaceAll(text, s.Value, s.Replacement)
}
if bytes.Contains(text, s.ValueEncoded) {
text = bytes.ReplaceAll(text, s.ValueEncoded, s.Replacement)
}
return text
}