Fix SSL config forwarding: update docs, examples, and add tests for config.requestOptions

Fix issue #239 - Users upgrading to Node 18+ encounter SSL errors due to
OpenSSL changes. The config.requestOptions mechanism already supports passing
agentOptions through to postman-request, but was undocumented.

Changes:
- Fix README: change broken rpOptions to requestOptions in SOCKS proxy example
- Add SSL/TLS configuration section to README with usage examples
- Update pass_request_options.js example to show init-time and per-call options
- Add 7 unit tests verifying config.requestOptions forwarding for all methods

Co-authored-by: aviadhahami <7353632+aviadhahami@users.noreply.github.com>

Author: Copilot

README.md

@@ -120,14 +120,50 @@ const SocksProxyAgent = require('socks-proxy-agent');
 const agent = new SocksProxyAgent(`socks://127.0.0.1:${socks4Port}`, true);
 const options = {
   apiVersion: 'v1',
-  rpOptions: {
+  requestOptions: {
     agent,
   },
 };
 
 const vault = require('node-vault')(options);
 ```
 
+## Custom SSL/TLS Configuration
+
+If you encounter SSL errors after upgrading to Node 18+ (e.g., `EPROTO` errors related to
+`unsafe legacy renegotiation disabled`), you can pass SSL/TLS options via `requestOptions`
+or `rpDefaults` when initializing the client:
+
+```javascript
+const vault = require('node-vault')({
+  apiVersion: 'v1',
+  endpoint: 'https://vault.example.com:8200',
+  token: 'MY_TOKEN',
+  requestOptions: {
+    agentOptions: {
+      securityOptions: 'SSL_OP_LEGACY_SERVER_CONNECT',
+    },
+  },
+});
+```
+
+The `requestOptions` object is passed through to the underlying HTTP library
+([postman-request](https://www.npmjs.com/package/postman-request)) for every request. You can
+use it to configure any supported request option, including `agentOptions`, custom `headers`,
+or a custom `agent`.
+
+You can also pass request options per-call to any method:
+
+```javascript
+vault.read('secret/hello', {
+  agentOptions: {
+    securityOptions: 'SSL_OP_LEGACY_SERVER_CONNECT',
+  },
+});
+```
+
+See [example/pass_request_options.js](example/pass_request_options.js) for more examples.
+
 [![Backers](https://opencollective.com/node-vault/tiers/backers.svg?avatarHeight=80&width=600)](https://opencollective.com/node-vault/contribute)
 
 [examples]: https://github.com/nodevault/node-vault/tree/master/example

example/pass_request_options.js

@@ -2,9 +2,21 @@
 
 process.env.DEBUG = 'node-vault'; // switch on debug mode
 
-const vault = require('./../src/index')();
+// Pass request options at initialization time.
+// These options are forwarded to postman-request for every request.
+const vault = require('./../src/index')({
+    requestOptions: {
+        agentOptions: {
+            cert: 'mycert',
+            key: 'mykey',
+            passphrase: 'password',
+            securityOptions: 'SSL_OP_NO_SSLv3',
+        },
+    },
+});
 
-const options = {
+// You can also pass (or override) request options per-call.
+const perCallOptions = {
     headers: {
         'X-HELLO': 'world',
     },
@@ -16,6 +28,6 @@ const options = {
     },
 };
 
-vault.help('sys/policy', options)
+vault.help('sys/policy', perCallOptions)
     .then(() => vault.help('sys/mounts'))
     .catch((err) => console.error(err.message));

test/unit.js

@@ -295,6 +295,142 @@ describe('node-vault', () => {
             });
         });
 
+        describe('config.requestOptions forwarding', () => {
+            let requestWithOpts = null;
+            let vaultWithOpts = null;
+
+            const agentOpts = {
+                securityOptions: 'SSL_OP_LEGACY_SERVER_CONNECT',
+            };
+
+            function getURIWithOpts(path) {
+                return [vaultWithOpts.endpoint, vaultWithOpts.apiVersion, path].join('/');
+            }
+
+            function assertRequestWithOpts(thisRequest, params, done) {
+                return () => {
+                    thisRequest.should.have.calledOnce();
+                    thisRequest.calledWithMatch(params).should.be.ok();
+                    return done();
+                };
+            }
+
+            beforeEach(() => {
+                requestWithOpts = sinon.stub();
+                const resp = sinon.stub();
+                resp.statusCode = 200;
+
+                requestWithOpts.returns({
+                    then(fn) {
+                        return fn(resp);
+                    },
+                    catch(fn) {
+                        return fn();
+                    },
+                });
+
+                vaultWithOpts = index({
+                    endpoint: 'http://localhost:8200',
+                    token: '123',
+                    'request-promise': {
+                        defaults: () => requestWithOpts,
+                    },
+                    requestOptions: {
+                        agentOptions: agentOpts,
+                    },
+                });
+            });
+
+            it('should forward agentOptions from config.requestOptions in help()', (done) => {
+                const path = 'sys/policy';
+                const params = {
+                    method: 'GET',
+                    uri: `${getURIWithOpts(path)}?help=1`,
+                    agentOptions: agentOpts,
+                };
+                vaultWithOpts.help(path)
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+
+            it('should forward agentOptions from config.requestOptions in read()', (done) => {
+                const path = 'secret/hello';
+                const params = {
+                    method: 'GET',
+                    uri: getURIWithOpts(path),
+                    agentOptions: agentOpts,
+                };
+                vaultWithOpts.read(path)
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+
+            it('should forward agentOptions from config.requestOptions in write()', (done) => {
+                const path = 'secret/hello';
+                const params = {
+                    method: 'POST',
+                    uri: getURIWithOpts(path),
+                    agentOptions: agentOpts,
+                };
+                vaultWithOpts.write(path, { value: 'world' })
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+
+            it('should forward agentOptions from config.requestOptions in delete()', (done) => {
+                const path = 'secret/hello';
+                const params = {
+                    method: 'DELETE',
+                    uri: getURIWithOpts(path),
+                    agentOptions: agentOpts,
+                };
+                vaultWithOpts.delete(path)
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+
+            it('should forward agentOptions from config.requestOptions in list()', (done) => {
+                const path = 'secret/hello';
+                const params = {
+                    method: 'LIST',
+                    uri: getURIWithOpts(path),
+                    agentOptions: agentOpts,
+                };
+                vaultWithOpts.list(path)
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+
+            it('should forward agentOptions from config.requestOptions in generated functions', (done) => {
+                const name = 'myTestFunction';
+                vaultWithOpts.generateFunction(name, {
+                    method: 'GET',
+                    path: '/myroute',
+                });
+                const params = {
+                    agentOptions: agentOpts,
+                };
+                vaultWithOpts[name]()
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+
+            it('should allow per-call requestOptions to override config.requestOptions', (done) => {
+                const path = 'secret/hello';
+                const overrideOpts = {
+                    securityOptions: 'SSL_OP_NO_SSLv3',
+                };
+                const params = {
+                    method: 'GET',
+                    uri: getURIWithOpts(path),
+                    agentOptions: overrideOpts,
+                };
+                vaultWithOpts.read(path, { agentOptions: overrideOpts })
+                    .then(assertRequestWithOpts(requestWithOpts, params, done))
+                    .catch(done);
+            });
+        });
+
         describe('unwrap(options)', () => {
             it('should return original response', (done) => {
                 const path = 'sys/wrapping/unwrap';