Supported ssl dhparam

Author: jackycute

README.md

@@ -105,6 +105,7 @@ Server-side config.js settings
 | sslkeypath | `./cert/client.key` | ssl key path |
 | sslcertpath | `./cert/hackmd_io.crt` | ssl cert path |
 | sslcapath | `['./cert/COMODORSAAddTrustCA.crt']` | ssl ca chain |
+| dhparampath | `./cert/dhparam.pem` | ssl dhparam path |
 | tmppath | `./tmp/` | temp file path |
 | postgresqlstring | `postgresql://user:pass@host:port/hackmd` | PostgreSQL connection string, fallback to this when not set in environment |
 | mongodbstring | `mongodb://user:pass@host:port/hackmd` | MongoDB connection string, fallback to this when not set in environment |

app.js

@@ -40,6 +40,7 @@ if (config.usessl) {
         key: fs.readFileSync(config.sslkeypath, 'utf8'),
         cert: fs.readFileSync(config.sslcertpath, 'utf8'),
         ca: ca,
+        dhparam: fs.readFileSync(config.dhparampath, 'utf8'),
         requestCert: false,
         rejectUnauthorized: false
     };

config.js

@@ -24,6 +24,7 @@ var config = {
     sslkeypath: 'change this',
     sslcertpath: 'change this',
     sslcapath: ['change this'],
+    dhparampath: 'change this',
     usessl: usessl,
     getserverurl: function() {
         var url = domain;