crypto: make FIPS related options always awailable

There is no reason to hide FIPS functionality behind build flags. OpenSSL always provide the information about FIPS availability via `FIPS_mode()` function. This makes the user experience more consistent, because the OpenSSL library is always queried and the `crypto.getFips()` always returns OpenSSL settings. Fixes nodejs#34903 PR-URL: nodejs#36341 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
danbev · Sep 28, 2021 · 209db1c · 209db1c
1 parent d2834fb
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diff --git a/doc/api/cli.md b/doc/api/cli.md
@@ -201,8 +201,8 @@ priority than `--dns-result-order`.
 added: v6.0.0
 -->
 
-Enable FIPS-compliant crypto at startup. (Requires Node.js to be built with
-`./configure --openssl-fips`.)
+Enable FIPS-compliant crypto at startup. (Requires Node.js to be built
+against FIPS-compatible OpenSSL.)
 
 ### `--enable-source-maps`
 <!-- YAML
@@ -623,8 +623,8 @@ added: v6.9.0
 -->
 
 Load an OpenSSL configuration file on startup. Among other uses, this can be
-used to enable FIPS-compliant crypto if Node.js is built with
-`./configure --openssl-fips`.
+used to enable FIPS-compliant crypto if Node.js is built
+against FIPS-enabled OpenSSL.
 
 ### `--pending-deprecation`
 <!-- YAML

diff --git a/lib/crypto.js b/lib/crypto.js
@@ -37,12 +37,10 @@ assertCrypto();
 
 const {
   ERR_CRYPTO_FIPS_FORCED,
-  ERR_CRYPTO_FIPS_UNAVAILABLE
 } = require('internal/errors').codes;
 const constants = internalBinding('constants').crypto;
 const { getOptionValue } = require('internal/options');
 const pendingDeprecation = getOptionValue('--pending-deprecation');
-const { fipsMode } = internalBinding('config');
 const fipsForced = getOptionValue('--force-fips');
 const {
   getFipsCrypto,
@@ -193,10 +191,8 @@ module.exports = {
   sign: signOneShot,
   setEngine,
   timingSafeEqual,
-  getFips: !fipsMode ? getFipsDisabled :
-    fipsForced ? getFipsForced : getFipsCrypto,
-  setFips: !fipsMode ? setFipsDisabled :
-    fipsForced ? setFipsForced : setFipsCrypto,
+  getFips: fipsForced ? getFipsForced : getFipsCrypto,
+  setFips: fipsForced ? setFipsForced : setFipsCrypto,
   verify: verifyOneShot,
 
   // Classes
@@ -215,19 +211,11 @@ module.exports = {
   Verify
 };
 
-function setFipsDisabled() {
-  throw new ERR_CRYPTO_FIPS_UNAVAILABLE();
-}
-
 function setFipsForced(val) {
   if (val) return;
   throw new ERR_CRYPTO_FIPS_FORCED();
 }
 
-function getFipsDisabled() {
-  return 0;
-}
-
 function getFipsForced() {
   return 1;
 }
@@ -249,10 +237,8 @@ ObjectDefineProperties(module.exports, {
   },
   // crypto.fips is deprecated. DEP0093. Use crypto.getFips()/crypto.setFips()
   fips: {
-    get: !fipsMode ? getFipsDisabled :
-      fipsForced ? getFipsForced : getFipsCrypto,
-    set: !fipsMode ? setFipsDisabled :
-      fipsForced ? setFipsForced : setFipsCrypto
+    get: fipsForced ? getFipsForced : getFipsCrypto,
+    set: fipsForced ? setFipsForced : setFipsCrypto
   },
   DEFAULT_ENCODING: {
     enumerable: false,

diff --git a/node.gypi b/node.gypi
@@ -319,9 +319,6 @@
     [ 'node_use_openssl=="true"', {
       'defines': [ 'HAVE_OPENSSL=1' ],
       'conditions': [
-        ['openssl_fips != "" or openssl_is_fips=="true"', {
-          'defines': [ 'NODE_FIPS_MODE' ],
-        }],
         [ 'node_shared_openssl=="false"', {
           'dependencies': [
             './deps/openssl/openssl.gyp:openssl',

diff --git a/src/node.cc b/src/node.cc
@@ -1040,11 +1040,11 @@ InitializationResult InitializeOncePerProcess(int argc, char** argv) {
     if (credentials::SafeGetenv("NODE_EXTRA_CA_CERTS", &extra_ca_certs))
       crypto::UseExtraCaCerts(extra_ca_certs);
   }
-#ifdef NODE_FIPS_MODE
   // In the case of FIPS builds we should make sure
   // the random source is properly initialized first.
-  OPENSSL_init();
-#endif  // NODE_FIPS_MODE
+  if (FIPS_mode()) {
+    OPENSSL_init();
+  }
   // V8 on Windows doesn't have a good source of entropy. Seed it from
   // OpenSSL's pool.
   V8::SetEntropySource(crypto::EntropySource);

diff --git a/src/node_config.cc b/src/node_config.cc
@@ -42,9 +42,7 @@ static void Initialize(Local<Object> target,
   READONLY_FALSE_PROPERTY(target, "hasOpenSSL");
 #endif  // HAVE_OPENSSL
 
-#ifdef NODE_FIPS_MODE
   READONLY_TRUE_PROPERTY(target, "fipsMode");
-#endif
 
 #ifdef NODE_HAVE_I18N_SUPPORT
 

diff --git a/src/node_crypto.cc b/src/node_crypto.cc
@@ -45,6 +45,11 @@
 #ifndef OPENSSL_NO_ENGINE
 # include <openssl/engine.h>
 #endif  // !OPENSSL_NO_ENGINE
+
+#ifdef  OPENSSL_FIPS
+#  include <openssl/fips.h>
+#endif  // OPENSSL_FIPS
+
 #include <openssl/evp.h>
 #include <openssl/pem.h>
 #include <openssl/x509v3.h>
@@ -183,6 +188,16 @@ static int PasswordCallback(char* buf, int size, int rwflag, void* u) {
   return -1;
 }
 
+void TestFipsCrypto(const v8::FunctionCallbackInfo<v8::Value>& args) {
+#ifdef OPENSSL_FIPS
+  const auto enabled = FIPS_selftest() ? 1 : 0;
+#else  // OPENSSL_FIPS
+  const auto enabled = 0;
+#endif  // OPENSSL_FIPS
+
+  args.GetReturnValue().Set(enabled);
+}
+
 // Loads OpenSSL engine by engine id and returns it. The loaded engine
 // gets a reference so remember the corresponding call to ENGINE_free.
 // In case of error the appropriate js exception is scheduled
@@ -3618,12 +3633,10 @@ void CipherBase::Init(const char* cipher_type,
   HandleScope scope(env()->isolate());
   MarkPopErrorOnReturn mark_pop_error_on_return;
 
-#ifdef NODE_FIPS_MODE
   if (FIPS_mode()) {
     return env()->ThrowError(
         "crypto.createCipher() is not supported in FIPS mode.");
   }
-#endif  // NODE_FIPS_MODE
 
   const EVP_CIPHER* const cipher = EVP_get_cipherbyname(cipher_type);
   if (cipher == nullptr)
@@ -3809,13 +3822,11 @@ bool CipherBase::InitAuthenticated(const char* cipher_type, int iv_len,
       return false;
     }
 
-#ifdef NODE_FIPS_MODE
     // TODO(tniessen) Support CCM decryption in FIPS mode
     if (mode == EVP_CIPH_CCM_MODE && kind_ == kDecipher && FIPS_mode()) {
       env()->ThrowError("CCM decryption not supported in FIPS mode");
       return false;
     }
-#endif
 
     // Tell OpenSSL about the desired length.
     if (!EVP_CIPHER_CTX_ctrl(ctx_.get(), EVP_CTRL_AEAD_SET_TAG, auth_tag_len,
@@ -4690,7 +4701,6 @@ static AllocatedBuffer Node_SignFinal(Environment* env,
 }
 
 static inline bool ValidateDSAParameters(EVP_PKEY* key) {
-#ifdef NODE_FIPS_MODE
   /* Validate DSA2 parameters from FIPS 186-4 */
   if (FIPS_mode() && EVP_PKEY_DSA == EVP_PKEY_base_id(key)) {
     DSA* dsa = EVP_PKEY_get0_DSA(key);
@@ -4706,7 +4716,6 @@ static inline bool ValidateDSAParameters(EVP_PKEY* key) {
            (L == 2048 && N == 256) ||
            (L == 3072 && N == 256);
   }
-#endif  // NODE_FIPS_MODE
 
   return true;
 }
@@ -6866,7 +6875,6 @@ void InitCryptoOnce() {
   settings = nullptr;
 #endif
 
-#ifdef NODE_FIPS_MODE
   /* Override FIPS settings in cnf file, if needed. */
   unsigned long err = 0;  // NOLINT(runtime/int)
   if (per_process::cli_options->enable_fips_crypto ||
@@ -6881,7 +6889,6 @@ void InitCryptoOnce() {
             ERR_error_string(err, nullptr));
     UNREACHABLE();
   }
-#endif  // NODE_FIPS_MODE
 
 
   // Turn off compression. Saves memory and protects against CRIME attacks.
@@ -6927,7 +6934,6 @@ void SetEngine(const FunctionCallbackInfo<Value>& args) {
 }
 #endif  // !OPENSSL_NO_ENGINE
 
-#ifdef NODE_FIPS_MODE
 void GetFipsCrypto(const FunctionCallbackInfo<Value>& args) {
   args.GetReturnValue().Set(FIPS_mode() ? 1 : 0);
 }
@@ -6945,7 +6951,6 @@ void SetFipsCrypto(const FunctionCallbackInfo<Value>& args) {
     return ThrowCryptoError(env, err);
   }
 }
-#endif /* NODE_FIPS_MODE */
 
 namespace {
 // SecureBuffer uses openssl to allocate a Uint8Array using
@@ -7013,10 +7018,9 @@ void Initialize(Local<Object> target,
   env->SetMethod(target, "setEngine", SetEngine);
 #endif  // !OPENSSL_NO_ENGINE
 
-#ifdef NODE_FIPS_MODE
   env->SetMethodNoSideEffect(target, "getFipsCrypto", GetFipsCrypto);
   env->SetMethod(target, "setFipsCrypto", SetFipsCrypto);
-#endif
+  env->SetMethodNoSideEffect(target, "testFipsCrypto", TestFipsCrypto);
 
   env->SetMethod(target, "pbkdf2", PBKDF2);
   env->SetMethod(target, "generateKeyPairRSA", GenerateKeyPairRSA);

diff --git a/src/node_options.cc b/src/node_options.cc
@@ -766,7 +766,6 @@ PerProcessOptionsParser::PerProcessOptionsParser(
             &PerProcessOptions::ssl_openssl_cert_store);
   Implies("--use-openssl-ca", "[ssl_openssl_cert_store]");
   ImpliesNot("--use-bundled-ca", "[ssl_openssl_cert_store]");
-#if NODE_FIPS_MODE
   AddOption("--enable-fips",
             "enable FIPS crypto at startup",
             &PerProcessOptions::enable_fips_crypto,
@@ -775,7 +774,6 @@ PerProcessOptionsParser::PerProcessOptionsParser(
             "force FIPS crypto (cannot be disabled)",
             &PerProcessOptions::force_fips_crypto,
             kAllowedInEnvironment);
-#endif
 #endif
   AddOption("--use-largepages",
             "Map the Node.js static code to large pages. Options are "

diff --git a/src/node_options.h b/src/node_options.h
@@ -245,10 +245,8 @@ class PerProcessOptions : public Options {
 #endif
   bool use_openssl_ca = false;
   bool use_bundled_ca = false;
-#if NODE_FIPS_MODE
   bool enable_fips_crypto = false;
   bool force_fips_crypto = false;
-#endif
 #endif
 
   // Per-process because reports can be triggered outside a known V8 context.

diff --git a/test/parallel/test-cli-node-print-help.js b/test/parallel/test-cli-node-print-help.js
@@ -8,8 +8,6 @@ const common = require('../common');
 
 const assert = require('assert');
 const { exec } = require('child_process');
-const { internalBinding } = require('internal/test/binding');
-const { fipsMode } = internalBinding('config');
 let stdOut;
 
 
@@ -28,9 +26,8 @@ function validateNodePrintHelp() {
   const cliHelpOptions = [
     { compileConstant: HAVE_OPENSSL,
       flags: [ '--openssl-config=...', '--tls-cipher-list=...',
-               '--use-bundled-ca', '--use-openssl-ca' ] },
-    { compileConstant: fipsMode,
-      flags: [ '--enable-fips', '--force-fips' ] },
+               '--use-bundled-ca', '--use-openssl-ca',
+               '--enable-fips', '--force-fips' ] },
     { compileConstant: NODE_HAVE_I18N_SUPPORT,
       flags: [ '--icu-data-dir=...', 'NODE_ICU_DATA' ] },
     { compileConstant: HAVE_INSPECTOR,