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internal/redaction/redaction.go

@@ -0,0 +1,39 @@
+package redaction
+
+import (
+	"regexp"
+	"strings"
+)
+
+const replacement = "<redacted>"
+
+var sensitivePattern = regexp.MustCompile(`(?i)(authorization|cookie|password|passwd|secret|token|api[_-]?key|client[_-]?secret)(\s*[:=]\s*)(?:bearer\s+)?([^,;\s]+)`)
+
+func String(value string) string {
+	return sensitivePattern.ReplaceAllString(value, `$1$2`+replacement)
+}
+
+func Value(key string, value any) any {
+	if sensitiveKey(key) {
+		return replacement
+	}
+	return value
+}
+
+func Map(values map[string]any) map[string]any {
+	clean := make(map[string]any, len(values))
+	for key, value := range values {
+		clean[key] = Value(key, value)
+	}
+	return clean
+}
+
+func sensitiveKey(key string) bool {
+	key = strings.ToLower(strings.ReplaceAll(strings.ReplaceAll(key, "-", "_"), " ", "_"))
+	for _, part := range []string{"authorization", "cookie", "password", "passwd", "secret", "token", "api_key", "apikey", "client_secret"} {
+		if strings.Contains(key, part) {
+			return true
+		}
+	}
+	return false
+}