crypto: fix error of createCipher in wrap mode

EVP_CIPHER_CTX_FLAG_WRAP_ALLOW flag needs to be set in using wrap mode ciphers. In `crypto.createCipher()`, AES key wrap mode does not use a default IV defined in RFC3394 but a generated IV with `EVP_BytesToKey()` to be consistent API behaviors with other ciphers. The built-in AES wrap mode in OpenSSL is not supported in FIPS mode as http://openssl.6102.n7.nabble.com/AES-Key-Wrap-in-FIPS-Mode-td50238.html so its tests in FIPS mode are skipped. Fixes: #15009 PR-URL: #15037 Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: James M Snell <jasnell@gmail.com>
nodejs · bnoordhuis · Jun 20, 2017 · Oct 29, 2017 · Aug 24, 2017 · Aug 27, 2017
commit 07e141c8285299ea1259186ee5f2900de98fc8cf
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
@@ -3360,6 +3360,9 @@ void CipherBase::Init(const char* cipher_type,
                        cipher_type);
   }
 
+  if (mode == EVP_CIPH_WRAP_MODE)
+    EVP_CIPHER_CTX_set_flags(&ctx_, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
+
   if (!EVP_CIPHER_CTX_set_key_length(&ctx_, key_len)) {
     EVP_CIPHER_CTX_cleanup(&ctx_);
     return env()->ThrowError("Invalid key length");
@@ -3407,13 +3410,18 @@ void CipherBase::InitIv(const char* cipher_type,
   }
 
   const int expected_iv_len = EVP_CIPHER_iv_length(cipher_);
-  const bool is_gcm_mode = (EVP_CIPH_GCM_MODE == EVP_CIPHER_mode(cipher_));
+  const int mode = EVP_CIPHER_mode(cipher_);
+  const bool is_gcm_mode = (EVP_CIPH_GCM_MODE == mode);
 
   if (is_gcm_mode == false && iv_len != expected_iv_len) {
     return env()->ThrowError("Invalid IV length");
   }
 
   EVP_CIPHER_CTX_init(&ctx_);
+
+  if (mode == EVP_CIPH_WRAP_MODE)
+    EVP_CIPHER_CTX_set_flags(&ctx_, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
+
   const bool encrypt = (kind_ == kCipher);
   EVP_CipherInit_ex(&ctx_, cipher_, nullptr, nullptr, nullptr, encrypt);
 

diff --git a/test/parallel/test-crypto-binary-default.js b/test/parallel/test-crypto-binary-default.js
@@ -509,12 +509,33 @@ function testCipher4(key, iv) {
                      'encryption and decryption with key and iv');
 }
 
+
+function testCipher5(key, iv) {
+  // Test encryption and decryption with explicit key with aes128-wrap
+  const plaintext =
+      '32|RmVZZkFUVmpRRkp0TmJaUm56ZU9qcnJkaXNNWVNpTTU*|iXmckfRWZBGWWELw' +
+      'eCBsThSsfUHLeRe0KCsK8ooHgxie0zOINpXxfZi/oNG7uq9JWFVCk70gfzQH8ZUJ' +
+      'jAfaFg**';
+  const cipher = crypto.createCipher('id-aes128-wrap', key);
+  let ciph = cipher.update(plaintext, 'utf8', 'buffer');
+  ciph = Buffer.concat([ciph, cipher.final('buffer')]);
+
+  const decipher = crypto.createDecipher('id-aes128-wrap', key);
+  let txt = decipher.update(ciph, 'buffer', 'utf8');
+  txt += decipher.final('utf8');
+
+  assert.strictEqual(txt, plaintext,
+                     'encryption and decryption with key');
+}
+
 if (!common.hasFipsCrypto) {
   testCipher1('MySecretKey123');
   testCipher1(Buffer.from('MySecretKey123'));
 
   testCipher2('0123456789abcdef');
   testCipher2(Buffer.from('0123456789abcdef'));
+
+  testCipher5(Buffer.from('0123456789abcd0123456789'));
 }
 
 testCipher3('0123456789abcd0123456789', '12345678');

diff --git a/test/parallel/test-crypto-cipheriv-decipheriv.js b/test/parallel/test-crypto-cipheriv-decipheriv.js
@@ -55,12 +55,36 @@ function testCipher2(key, iv) {
   assert.strictEqual(txt, plaintext, 'encryption/decryption with key and iv');
 }
 
+
+function testCipher3(key, iv) {
+  // Test encryption and decryption with explicit key and iv.
+  // AES Key Wrap test vector comes from RFC3394
+  const plaintext = Buffer.from('00112233445566778899AABBCCDDEEFF', 'hex');
+
+  const cipher = crypto.createCipheriv('id-aes128-wrap', key, iv);
+  let ciph = cipher.update(plaintext, 'utf8', 'buffer');
+  ciph = Buffer.concat([ciph, cipher.final('buffer')]);
+  const ciph2 = Buffer.from('1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5',
+                            'hex');
+  assert(ciph.equals(ciph2));
+  const decipher = crypto.createDecipheriv('id-aes128-wrap', key, iv);
+  let deciph = decipher.update(ciph, 'buffer');
+  deciph = Buffer.concat([deciph, decipher.final()]);
+
+  assert(deciph.equals(plaintext), 'encryption/decryption with key and iv');
+}
+
 testCipher1('0123456789abcd0123456789', '12345678');
 testCipher1('0123456789abcd0123456789', Buffer.from('12345678'));
 testCipher1(Buffer.from('0123456789abcd0123456789'), '12345678');
 testCipher1(Buffer.from('0123456789abcd0123456789'), Buffer.from('12345678'));
 testCipher2(Buffer.from('0123456789abcd0123456789'), Buffer.from('12345678'));
 
+if (!common.hasFipsCrypto) {
+  testCipher3(Buffer.from('000102030405060708090A0B0C0D0E0F', 'hex'),
+              Buffer.from('A6A6A6A6A6A6A6A6', 'hex'));
+}
+
 // Zero-sized IV should be accepted in ECB mode.
 crypto.createCipheriv('aes-128-ecb', Buffer.alloc(16), Buffer.alloc(0));