[v16.x] src: add --openssl-legacy-provider option

doc/api/cli.md

@@ -732,6 +732,15 @@ Load an OpenSSL configuration file on startup. Among other uses, this can be
 used to enable FIPS-compliant crypto if Node.js is built
 against FIPS-enabled OpenSSL.
 
+### `--openssl-legacy-provider`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+Enable OpenSSL 3.0 legacy provider when dynamically linking to OpenSSL 3.x.
+For more information please see [OSSL\_PROVIDER-legacy][OSSL_PROVIDER-legacy].
+
 ### `--pending-deprecation`
 
 <!-- YAML
@@ -1592,6 +1601,7 @@ Node.js options that are allowed are:
 * `--no-warnings`
 * `--node-memory-debug`
 * `--openssl-config`
+* `--openssl-legacy-provider`
 * `--pending-deprecation`
 * `--policy-integrity`
 * `--preserve-symlinks-main`
@@ -1952,6 +1962,7 @@ $ node --max-old-space-size=1536 index.js
 [ECMAScript module loader]: esm.md#loaders
 [Fetch API]: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
 [Modules loaders]: packages.md#modules-loaders
+[OSSL_PROVIDER-legacy]: https://www.openssl.org/docs/man3.0/man7/OSSL_PROVIDER-legacy.html
 [REPL]: repl.md
 [ScriptCoverage]: https://chromedevtools.github.io/devtools-protocol/tot/Profiler#type-ScriptCoverage
 [Source Map]: https://sourcemaps.info/spec.html

src/crypto/crypto_util.cc

@@ -148,6 +148,16 @@ void InitCryptoOnce() {
   }
 #endif
 
+#if OPENSSL_VERSION_MAJOR >= 3
+  // --openssl-legacy-provider
+  if (per_process::cli_options->openssl_legacy_provider) {
+    OSSL_PROVIDER* legacy_provider = OSSL_PROVIDER_load(nullptr, "legacy");
+    if (legacy_provider == nullptr) {
+      fprintf(stderr, "Unable to load legacy provider.\n");
+    }
+  }
+#endif
+
   OPENSSL_init_ssl(0, settings);
   OPENSSL_INIT_free(settings);
   settings = nullptr;

src/node_options.cc

@@ -5,6 +5,9 @@
 #include "node_binding.h"
 #include "node_external_reference.h"
 #include "node_internals.h"
+#if HAVE_OPENSSL
+#include "openssl/opensslv.h"
+#endif
 
 #include <errno.h>
 #include <sstream>

src/node_options.h

@@ -11,6 +11,10 @@
 #include "node_mutex.h"
 #include "util.h"
 
+#if HAVE_OPENSSL
+#include "openssl/opensslv.h"
+#endif
+
 namespace node {
 
 class HostPort {
@@ -252,6 +256,9 @@ class PerProcessOptions : public Options {
   bool enable_fips_crypto = false;
   bool force_fips_crypto = false;
 #endif
+#if OPENSSL_VERSION_MAJOR >= 3
+  bool openssl_legacy_provider = false;
+#endif
 
   // Per-process because reports can be triggered outside a known V8 context.
   bool report_on_fatalerror = false;

test/parallel/test-process-env-allowed-flags-are-documented.js

@@ -43,13 +43,18 @@ for (const line of [...nodeOptionsLines, ...v8OptionsLines]) {
   }
 }
 
+if (!common.hasOpenSSL3) {
+  documented.delete('--openssl-legacy-provider');
+}
+
 // Filter out options that are conditionally present.
 const conditionalOpts = [
   {
     include: common.hasCrypto,
     filter: (opt) => {
       return [
         '--openssl-config',
+        common.hasOpenSSL3 ? '--openssl-legacy-provider' : '',
         '--tls-cipher-list',
         '--use-bundled-ca',
         '--use-openssl-ca',