🛡️ Sentinel: [HIGH] Redact secrets from logs

dist/lib/logger.js

@@ -2,6 +2,7 @@ import { existsSync, mkdirSync, appendFileSync, readFileSync, writeFileSync } fr
 import { dirname, join } from 'path';
 import { PAI_DIR, getHistoryFilePath, HISTORY_DIR } from './paths';
 import { enrichEventWithAgentMetadata, isAgentSpawningCall } from './metadata-extraction';
+import { redactString, redactObject } from './redaction';
 export class Logger {
     sessionId;
     toolsUsed = new Set();
@@ -89,7 +90,7 @@ export class Logger {
                 if (tool === 'Bash' || tool === 'bash') {
                     const command = props?.input?.command || props?.tool_input?.command;
                     if (command)
-                        this.commandsExecuted.push(command);
+                        this.commandsExecuted.push(redactString(command));
                 }
                 if (['Edit', 'Write', 'edit', 'write'].includes(tool)) {
                     const path = props?.input?.file_path || props?.input?.path ||
@@ -99,7 +100,7 @@ export class Logger {
                 }
             }
         }
-        this.writeEvent(anyEvent.type, payload);
+        this.writeEvent(anyEvent.type, redactObject(payload));
     }
     /**
      * Log tool execution from tool.execute.after hook
@@ -127,7 +128,7 @@ export class Logger {
             tool_metadata: metadata,
             call_id: input.callID,
         };
-        this.writeEvent('ToolUse', payload, toolName, metadata);
+        this.writeEvent('ToolUse', redactObject(payload), toolName, metadata);
     }
     async generateSessionSummary() {
         try {

dist/lib/redaction.d.ts

@@ -0,0 +1,5 @@
+/**
+ * Redaction utility to scrub sensitive data from logs
+ */
+export declare function redactString(str: string): string;
+export declare function redactObject(obj: any): any;

dist/lib/redaction.js

@@ -0,0 +1,65 @@
+/**
+ * Redaction utility to scrub sensitive data from logs
+ */
+const SENSITIVE_KEYS = [
+    'api_key', 'apikey', 'secret', 'token', 'password', 'passwd', 'pwd',
+    'auth', 'credential', 'private_key', 'client_secret', 'access_key'
+];
+const SECRET_PATTERNS = [
+    // AWS Access Key ID
+    /\b(AKIA|ASIA)[0-9A-Z]{16}\b/g,
+    // GitHub Personal Access Token (classic)
+    /\bghp_[a-zA-Z0-9]{36}\b/g,
+    // Generic Private Key
+    /-----BEGIN [A-Z ]+ PRIVATE KEY-----/g,
+    // Bearer Token (simple heuristic - starts with Bearer, followed by base64-ish chars)
+    /\bBearer\s+[a-zA-Z0-9\-\._~+/]+=*/g,
+];
+// Regex for Key-Value assignments like "key=value" or "key: value" where key is sensitive
+// This catches "export AWS_SECRET_KEY=..." or JSON "password": "..."
+// We construct this dynamically from SENSITIVE_KEYS
+const SENSITIVE_KEY_PATTERN = new RegExp(`\\b([a-zA-Z0-9_]*(${SENSITIVE_KEYS.join('|')})[a-zA-Z0-9_]*)\\s*[:=]\\s*['"]?([^\\s'"]{8,})['"]?`, 'gi');
+export function redactString(str) {
+    if (!str)
+        return str;
+    let redacted = str;
+    // 1. Redact specific patterns (like AWS keys)
+    for (const pattern of SECRET_PATTERNS) {
+        redacted = redacted.replace(pattern, '[REDACTED]');
+    }
+    // 2. Redact key-value pairs where key suggests sensitivity
+    // We use a callback to preserve the key and redact the value
+    redacted = redacted.replace(SENSITIVE_KEY_PATTERN, (match, key, keyword, value) => {
+        // If value is already redacted, skip
+        if (value === '[REDACTED]')
+            return match;
+        // Replace the value part with [REDACTED]
+        return match.replace(value, '[REDACTED]');
+    });
+    return redacted;
+}
+export function redactObject(obj) {
+    if (obj === null || obj === undefined)
+        return obj;
+    if (typeof obj === 'string') {
+        return redactString(obj);
+    }
+    if (Array.isArray(obj)) {
+        return obj.map(item => redactObject(item));
+    }
+    if (typeof obj === 'object') {
+        const newObj = {};
+        for (const [key, value] of Object.entries(obj)) {
+            // If the key itself is sensitive, redact the value blindly if it's a string/number
+            const isSensitiveKey = SENSITIVE_KEYS.some(k => key.toLowerCase().includes(k));
+            if (isSensitiveKey && (typeof value === 'string' || typeof value === 'number')) {
+                newObj[key] = '[REDACTED]';
+            }
+            else {
+                newObj[key] = redactObject(value);
+            }
+        }
+        return newObj;
+    }
+    return obj;
+}

src/lib/logger.ts

@@ -3,6 +3,7 @@ import { dirname, join } from 'path';
 import type { Event } from '@opencode-ai/sdk';
 import { PAI_DIR, getHistoryFilePath, HISTORY_DIR } from './paths';
 import { enrichEventWithAgentMetadata, isAgentSpawningCall } from './metadata-extraction';
+import { redactString, redactObject } from './redaction';
 
 interface HookEvent {
   source_app: string;
@@ -115,7 +116,7 @@ export class Logger {
 
               if (tool === 'Bash' || tool === 'bash') {
                   const command = props?.input?.command || props?.tool_input?.command;
-                  if (command) this.commandsExecuted.push(command);
+                  if (command) this.commandsExecuted.push(redactString(command));
               }
 
               if (['Edit', 'Write', 'edit', 'write'].includes(tool)) {
@@ -126,7 +127,7 @@ export class Logger {
           }
       }
 
-      this.writeEvent(anyEvent.type, payload);
+      this.writeEvent(anyEvent.type, redactObject(payload));
   }
 
   /**
@@ -162,7 +163,7 @@ export class Logger {
           call_id: input.callID,
       };
 
-      this.writeEvent('ToolUse', payload, toolName, metadata);
+      this.writeEvent('ToolUse', redactObject(payload), toolName, metadata);
   }
 
   public async generateSessionSummary(): Promise<string | null> {

src/lib/redaction.ts

@@ -0,0 +1,90 @@
+/**
+ * Redaction utility to scrub sensitive data from logs
+ */
+
+const SENSITIVE_KEYS = [
+  'api_key', 'apikey', 'secret', 'token', 'password', 'passwd', 'pwd',
+  'auth', 'credential', 'private_key', 'client_secret', 'access_key'
+];
+
+const SECRET_PATTERNS = [
+  // AWS Access Key ID
+  /\b(AKIA|ASIA)[0-9A-Z]{16}\b/g,
+  // GitHub Personal Access Token (classic)
+  /\bghp_[a-zA-Z0-9]{36}\b/g,
+  // Generic Private Key
+  /-----BEGIN [A-Z ]+ PRIVATE KEY-----/g,
+  // Bearer Token (simple heuristic - starts with Bearer, followed by base64-ish chars)
+  /\bBearer\s+[a-zA-Z0-9\-\._~+/]+=*/g,
+];
+
+// Regex for Key-Value assignments like "key=value" or "key: value" where key is sensitive
+// This catches "export AWS_SECRET_KEY=..." or JSON "password": "..."
+// We construct this dynamically from SENSITIVE_KEYS
+const SENSITIVE_KEY_PATTERN = new RegExp(
+  `\\b([a-zA-Z0-9_]*(${SENSITIVE_KEYS.join('|')})[a-zA-Z0-9_]*)\\s*[:=]\\s*['"]?([^\\s'"]{8,})['"]?`,
+  'gi'
+);
+
+export function redactString(str: string): string {
+  if (!str) return str;
+
+  let redacted = str;
+
+  // 1. Redact specific patterns (like AWS keys)
+  for (const pattern of SECRET_PATTERNS) {
+    redacted = redacted.replace(pattern, '[REDACTED]');
+  }
+
+  // 2. Redact key-value pairs where key suggests sensitivity
+  // We use a callback to preserve the key and redact the value
+  redacted = redacted.replace(SENSITIVE_KEY_PATTERN, (match, key, keyword, value) => {
+    // If value is already redacted, skip
+    if (value === '[REDACTED]') return match;
+    // Replace the value part with [REDACTED]
+    return match.replace(value, '[REDACTED]');
+  });
+
+  return redacted;
+}
+
+export function redactObject(obj: any, visited = new WeakSet<any>()): any {
+  if (obj === null || obj === undefined) return obj;
+
+  if (typeof obj === 'string') {
+    return redactString(obj);
+  }
+
+  if (typeof obj !== 'object') {
+    return obj;
+  }
+
+  if (obj instanceof Date) {
+    return obj;
+  }
+
+  if (visited.has(obj)) {
+    return '[CIRCULAR]';
+  }
+  visited.add(obj);
+
+  if (Array.isArray(obj)) {
+    return obj.map(item => redactObject(item, visited));
+  }
+
+  if (typeof obj === 'object') {
+    const newObj: any = {};
+    for (const [key, value] of Object.entries(obj)) {
+        // If the key itself is sensitive, redact the value blindly if it's a string/number
+        const isSensitiveKey = SENSITIVE_KEYS.some(k => key.toLowerCase().includes(k));
+        if (isSensitiveKey && (typeof value === 'string' || typeof value === 'number')) {
+             newObj[key] = '[REDACTED]';
+        } else {
+             newObj[key] = redactObject(value, visited);
+        }
+    }
+    return newObj;
+  }
+
+  return obj;
+}

src/lib/security.ts

@@ -1,3 +1,5 @@
+import { redactString } from './redaction';
+
 /**
  * Security Library for PAI Plugin
  * Ported from legacy security-validator.ts
@@ -54,7 +56,7 @@ export function validateCommand(command: string): SecurityResult {
         return {
           status: 'deny',
           category,
-          feedback: `🚨 SECURITY: Blocked ${category} pattern. Command: ${command.slice(0, 50)}...`,
+          feedback: `🚨 SECURITY: Blocked ${category} pattern. Command: ${redactString(command).slice(0, 50)}...`,
         };
       }
     }

tests/redaction.test.ts

@@ -0,0 +1,66 @@
+import { describe, it, expect } from 'bun:test';
+import { redactString, redactObject } from '../src/lib/redaction';
+
+describe('Redaction Utility', () => {
+  it('should redact AWS keys', () => {
+    const input = 'export AWS_SECRET_KEY=AKIAIOSFODNN7EXAMPLE';
+    const output = redactString(input);
+    expect(output).toContain('AWS_SECRET_KEY=[REDACTED]');
+    expect(output).not.toContain('AKIAIOSFODNN7EXAMPLE');
+  });
+
+  it('should redact sensitive key-value pairs', () => {
+    const input = 'password="superSecretPassword"';
+    const output = redactString(input);
+    expect(output).toContain('password="[REDACTED]"');
+    expect(output).not.toContain('superSecretPassword');
+  });
+
+  it('should redact generic secrets', () => {
+    const input = 'my_secret_token = abcdef1234567890';
+    const output = redactString(input);
+    expect(output).toContain('my_secret_token = [REDACTED]');
+    expect(output).not.toContain('abcdef1234567890');
+  });
+
+  it('should redact inside objects', () => {
+    const input = {
+      user: 'alice',
+      credentials: {
+        password: 'password123',
+        apiKey: 'AKIAIOSFODNN7EXAMPLE'
+      }
+    };
+    const output = redactObject(input);
+    expect(output.user).toBe('alice');
+    expect(output.credentials.password).toBe('[REDACTED]');
+    expect(output.credentials.apiKey).toBe('[REDACTED]');
+  });
+
+  it('should not redact harmless values', () => {
+    const input = 'user_id=123';
+    const output = redactString(input);
+    expect(output).toBe(input);
+  });
+
+  it('should redact short values in objects if key is sensitive', () => {
+      const obj = { password: '123' };
+      const output = redactObject(obj);
+      expect(output.password).toBe('[REDACTED]');
+  });
+
+  it('should handle circular references', () => {
+    const obj: any = { name: 'circular' };
+    obj.self = obj;
+    const output = redactObject(obj);
+    expect(output.name).toBe('circular');
+    expect(output.self).toBe('[CIRCULAR]');
+  });
+
+  it('should preserve Date objects', () => {
+    const date = new Date('2023-01-01');
+    const obj = { created_at: date };
+    const output = redactObject(obj);
+    expect(output.created_at).toEqual(date);
+  });
+});