Monorepo for Tangled
tangled.org
spindle/models create a secret mask for workflow logs
Signed-off-by: Evan Jarrett <evan@evanjarrett.com>
author
Evan Jarrett
committer
![]()
tangled.org
date
(Dec 21, 2025, 10:04 AM UTC)
commit
7ec6ecc1
7ec6ecc1607bbdd4434327b16ccbbb76bd1edace
parent
897dd7b8
897dd7b8089892c43fa2cb692538344413ddd517
+197
-2
+5
-1
spindle/engine/engine.go
+5
-1
spindle/engine/engine.go
···
70
70
}
71
71
defer eng.DestroyWorkflow(ctx, wid)
72
72
73
-
wfLogger, err := models.NewWorkflowLogger(cfg.Server.LogDir, wid)
73
+
secretValues := make([]string, len(allSecrets))
74
+
for i, s := range allSecrets {
75
+
secretValues[i] = s.Value
76
+
}
77
+
wfLogger, err := models.NewWorkflowLogger(cfg.Server.LogDir, wid, secretValues)
74
78
if err != nil {
75
79
l.Warn("failed to setup step logger; logs will not be persisted", "error", err)
76
80
wfLogger = nil
+6
-1
spindle/models/logger.go
+6
-1
spindle/models/logger.go
···
12
12
type WorkflowLogger struct {
13
13
file *os.File
14
14
encoder *json.Encoder
15
+
mask *SecretMask
15
16
}
16
17
17
-
func NewWorkflowLogger(baseDir string, wid WorkflowId) (*WorkflowLogger, error) {
18
+
func NewWorkflowLogger(baseDir string, wid WorkflowId, secretValues []string) (*WorkflowLogger, error) {
18
19
path := LogFilePath(baseDir, wid)
19
20
20
21
file, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
···
25
26
return &WorkflowLogger{
26
27
file: file,
27
28
encoder: json.NewEncoder(file),
29
+
mask: NewSecretMask(secretValues),
28
30
}, nil
29
31
}
30
32
···
62
64
63
65
func (w *dataWriter) Write(p []byte) (int, error) {
64
66
line := strings.TrimRight(string(p), "\r\n")
67
+
if w.logger.mask != nil {
68
+
line = w.logger.mask.Mask(line)
69
+
}
65
70
entry := NewDataLogLine(w.idx, line, w.stream)
66
71
if err := w.logger.encoder.Encode(entry); err != nil {
67
72
return 0, err
+51
spindle/models/secret_mask.go
+51
spindle/models/secret_mask.go
···
1
+
package models
2
+
3
+
import (
4
+
"encoding/base64"
5
+
"strings"
6
+
)
7
+
8
+
// SecretMask replaces secret values in strings with "***".
9
+
type SecretMask struct {
10
+
replacer *strings.Replacer
11
+
}
12
+
13
+
// NewSecretMask creates a mask for the given secret values.
14
+
// Also registers base64-encoded variants of each secret.
15
+
func NewSecretMask(values []string) *SecretMask {
16
+
var pairs []string
17
+
18
+
for _, value := range values {
19
+
if value == "" {
20
+
continue
21
+
}
22
+
23
+
pairs = append(pairs, value, "***")
24
+
25
+
b64 := base64.StdEncoding.EncodeToString([]byte(value))
26
+
if b64 != value {
27
+
pairs = append(pairs, b64, "***")
28
+
}
29
+
30
+
b64NoPad := strings.TrimRight(b64, "=")
31
+
if b64NoPad != b64 && b64NoPad != value {
32
+
pairs = append(pairs, b64NoPad, "***")
33
+
}
34
+
}
35
+
36
+
if len(pairs) == 0 {
37
+
return nil
38
+
}
39
+
40
+
return &SecretMask{
41
+
replacer: strings.NewReplacer(pairs...),
42
+
}
43
+
}
44
+
45
+
// Mask replaces all registered secret values with "***".
46
+
func (m *SecretMask) Mask(input string) string {
47
+
if m == nil || m.replacer == nil {
48
+
return input
49
+
}
50
+
return m.replacer.Replace(input)
51
+
}
+135
spindle/models/secret_mask_test.go
+135
spindle/models/secret_mask_test.go
···
1
+
package models
2
+
3
+
import (
4
+
"encoding/base64"
5
+
"testing"
6
+
)
7
+
8
+
func TestSecretMask_BasicMasking(t *testing.T) {
9
+
mask := NewSecretMask([]string{"mysecret123"})
10
+
11
+
input := "The password is mysecret123 in this log"
12
+
expected := "The password is *** in this log"
13
+
14
+
result := mask.Mask(input)
15
+
if result != expected {
16
+
t.Errorf("expected %q, got %q", expected, result)
17
+
}
18
+
}
19
+
20
+
func TestSecretMask_Base64Encoded(t *testing.T) {
21
+
secret := "mysecret123"
22
+
mask := NewSecretMask([]string{secret})
23
+
24
+
b64 := base64.StdEncoding.EncodeToString([]byte(secret))
25
+
input := "Encoded: " + b64
26
+
expected := "Encoded: ***"
27
+
28
+
result := mask.Mask(input)
29
+
if result != expected {
30
+
t.Errorf("expected %q, got %q", expected, result)
31
+
}
32
+
}
33
+
34
+
func TestSecretMask_Base64NoPadding(t *testing.T) {
35
+
// "test" encodes to "dGVzdA==" with padding
36
+
secret := "test"
37
+
mask := NewSecretMask([]string{secret})
38
+
39
+
b64NoPad := "dGVzdA" // base64 without padding
40
+
input := "Token: " + b64NoPad
41
+
expected := "Token: ***"
42
+
43
+
result := mask.Mask(input)
44
+
if result != expected {
45
+
t.Errorf("expected %q, got %q", expected, result)
46
+
}
47
+
}
48
+
49
+
func TestSecretMask_MultipleSecrets(t *testing.T) {
50
+
mask := NewSecretMask([]string{"password1", "apikey123"})
51
+
52
+
input := "Using password1 and apikey123 for auth"
53
+
expected := "Using *** and *** for auth"
54
+
55
+
result := mask.Mask(input)
56
+
if result != expected {
57
+
t.Errorf("expected %q, got %q", expected, result)
58
+
}
59
+
}
60
+
61
+
func TestSecretMask_MultipleOccurrences(t *testing.T) {
62
+
mask := NewSecretMask([]string{"secret"})
63
+
64
+
input := "secret appears twice: secret"
65
+
expected := "*** appears twice: ***"
66
+
67
+
result := mask.Mask(input)
68
+
if result != expected {
69
+
t.Errorf("expected %q, got %q", expected, result)
70
+
}
71
+
}
72
+
73
+
func TestSecretMask_ShortValues(t *testing.T) {
74
+
mask := NewSecretMask([]string{"abc", "xy", ""})
75
+
76
+
if mask == nil {
77
+
t.Fatal("expected non-nil mask")
78
+
}
79
+
80
+
input := "abc xy test"
81
+
expected := "*** *** test"
82
+
result := mask.Mask(input)
83
+
if result != expected {
84
+
t.Errorf("expected %q, got %q", expected, result)
85
+
}
86
+
}
87
+
88
+
func TestSecretMask_NilMask(t *testing.T) {
89
+
var mask *SecretMask
90
+
91
+
input := "some input text"
92
+
result := mask.Mask(input)
93
+
if result != input {
94
+
t.Errorf("expected %q, got %q", input, result)
95
+
}
96
+
}
97
+
98
+
func TestSecretMask_EmptyInput(t *testing.T) {
99
+
mask := NewSecretMask([]string{"secret"})
100
+
101
+
result := mask.Mask("")
102
+
if result != "" {
103
+
t.Errorf("expected empty string, got %q", result)
104
+
}
105
+
}
106
+
107
+
func TestSecretMask_NoMatch(t *testing.T) {
108
+
mask := NewSecretMask([]string{"secretvalue"})
109
+
110
+
input := "nothing to mask here"
111
+
result := mask.Mask(input)
112
+
if result != input {
113
+
t.Errorf("expected %q, got %q", input, result)
114
+
}
115
+
}
116
+
117
+
func TestSecretMask_EmptySecretsList(t *testing.T) {
118
+
mask := NewSecretMask([]string{})
119
+
120
+
if mask != nil {
121
+
t.Error("expected nil mask for empty secrets list")
122
+
}
123
+
}
124
+
125
+
func TestSecretMask_EmptySecretsFiltered(t *testing.T) {
126
+
mask := NewSecretMask([]string{"ab", "validpassword", "", "xyz"})
127
+
128
+
input := "Using validpassword here"
129
+
expected := "Using *** here"
130
+
131
+
result := mask.Mask(input)
132
+
if result != expected {
133
+
t.Errorf("expected %q, got %q", expected, result)
134
+
}
135
+
}