Pass 1

Author: dgarske

README.md

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+# wolfCrypt Node.JS support
+
+Wrappers for wolfCrypt ciphers.
+
+## Building wolfSSL
+
+```
+./configure --enable-all
+make
+sudo make install
+```
+
+To link wolfcrypt you need to run `export LD_LIBRARY_PATH=/usr/local/lib` or wherever you have your wolfssl installed:
+
+Verify the .so (shared object) path and version in `binding.gyp`:
+
+```
+        'libraries': [
+          "/usr/local/lib/libwolfssl.so.34"
+        ],
+```
+
+Use npm to install and build:
+
+```
+npm i
+npm run build
+node app.js
+```

app.js

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+const wolfcrypt = require('./build/Release/wolfcrypt');
+
+let aes = Buffer.alloc( 300 )
+let key = Buffer.from( '12345678901234567890123456789012' )
+let iv = Buffer.from( '1234567890123456' )
+let plainText = Buffer.from( 'testtesttesttest' )
+let cipherText = Buffer.alloc( 16 )
+let plainAgain = Buffer.alloc( 16 )
+
+let ret = wolfcrypt.MakeAes( aes, key, iv )
+
+if ( ret == 0 )
+{
+  ret = wolfcrypt.Encrypt( aes, cipherText, plainText, 16 )
+}
+
+if ( ret == 0 )
+{
+  ret = wolfcrypt.Decrypt( aes, plainAgain, cipherText, 16 )
+}
+
+console.log( plainText.toString() );
+console.log( cipherText.toString( 'hex' ) );
+console.log( plainAgain.toString() );

binding.gyp

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+{
+    "targets": [{
+        "target_name": "wolfcrypt",
+        "cflags!": [ "-fno-exceptions" ],
+        "cflags_cc!": [ "-fno-exceptions" ],
+        "sources": [
+            "wolfbind/main.cpp"
+        ],
+        'include_dirs': [
+            "<!@(node -p \"require('node-addon-api').include\")"
+        ],
+        'libraries': [
+          "/usr/local/lib/libwolfssl.so.34"
+        ],
+        'dependencies': [
+            "<!(node -p \"require('node-addon-api').gyp\")"
+        ],
+        'defines': [ 'NAPI_DISABLE_C_EXCEPTIONS' ]
+    }]
+}

package.json

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+{
+  "name": "wolfcrypt_binding",
+  "version": "1.0.0",
+  "description": "",
+  "main": "app.js",
+  "gypfile": true,
+  "scripts": {
+    "run": "node app.js",
+    "build": "node-gyp rebuild",
+    "clean": "node-gyp clean"
+  },
+  "author": "John Bland",
+  "license": "GPL-2.0",
+  "devDependencies": {
+    "node-gyp": "^9.1.0"
+  },
+  "dependencies": {
+    "node-addon-api": "^5.0.0"
+  }
+}

wolfbind/main.cpp

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+#include <napi.h>
+#include <stdio.h>
+#include "wolfssl/options.h"
+#include <wolfssl/wolfcrypt/settings.h>
+#include <wolfssl/wolfcrypt/aes.h>
+
+using namespace Napi;
+
+typedef struct WrappedKey
+{
+  Aes aes[1];
+  uint8_t key[32];
+  uint8_t iv[16];
+} WrappedKey;
+
+Napi::Number MakeAes(const Napi::CallbackInfo& info) {
+  int ret = 0;
+  Napi::Env env = info.Env();
+  WrappedKey* key = (WrappedKey*)(info[0].As<Napi::Uint8Array>().Data());
+  memcpy( key->key, (info[1].As<Napi::Uint8Array>().Data()), 32 );
+  memcpy( key->iv, (info[2].As<Napi::Uint8Array>().Data()), 16 );
+
+  //ret = wc_AesInit( key->aes, NULL, INVALID_DEVID );
+
+  return Napi::Number::New( env, ret );
+}
+
+Napi::Number Encrypt(const Napi::CallbackInfo& info) {
+  int ret;
+  Napi::Env env = info.Env();
+  WrappedKey* key = (WrappedKey*)(info[0].As<Napi::Uint8Array>().Data());
+  uint8_t* out = info[1].As<Napi::Uint8Array>().Data();
+  uint8_t* in = info[2].As<Napi::Uint8Array>().Data();
+  int length = info[3].As<Napi::Number>().Int32Value();
+
+  ret = wc_AesSetKey( key->aes, key->key, AES_256_KEY_SIZE, key->iv, AES_ENCRYPTION );
+
+  if ( ret == 0 )
+    ret = wc_AesCbcEncrypt( key->aes, out, in, length );
+
+  return Napi::Number::New( env, ret );
+}
+
+Napi::Number Decrypt(const Napi::CallbackInfo& info)
+{
+  int ret;
+  Napi::Env env = info.Env();
+  WrappedKey* key = (WrappedKey*)(info[0].As<Napi::Uint8Array>().Data());
+  uint8_t* out = info[1].As<Napi::Uint8Array>().Data();
+  uint8_t* in = info[2].As<Napi::Uint8Array>().Data();
+  int length = info[3].As<Napi::Number>().Int32Value();
+
+  ret = wc_AesSetKey( key->aes, key->key, AES_256_KEY_SIZE, key->iv, AES_DECRYPTION );
+
+  if ( ret == 0 )
+    ret = wc_AesCbcDecrypt( key->aes, out, in, length );
+
+  return Napi::Number::New( env, ret );
+}
+
+Napi::Object Init(Napi::Env env, Napi::Object exports) {
+  exports.Set(Napi::String::New(env, "MakeAes"), Napi::Function::New(env, MakeAes));
+  exports.Set(Napi::String::New(env, "Encrypt"), Napi::Function::New(env, Encrypt));
+  exports.Set(Napi::String::New(env, "Decrypt"), Napi::Function::New(env, Decrypt));
+
+  return exports;
+}
+
+NODE_API_MODULE( addon, Init )