crypto: improve RSA-PSS digest error messages

md and mgf1_md are internal variable names and should not appear in
JS error messages. Also include the invalid digest name in the error
message.

PR-URL: nodejs/node#44307
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

src/crypto/crypto_rsa.cc

@@ -153,7 +153,7 @@ Maybe<bool> RsaKeyGenTraits::AdditionalConfig(
       Utf8Value digest(env->isolate(), args[*offset]);
       params->params.md = EVP_get_digestbyname(*digest);
       if (params->params.md == nullptr) {
-        THROW_ERR_CRYPTO_INVALID_DIGEST(env, "md specifies an invalid digest");
+        THROW_ERR_CRYPTO_INVALID_DIGEST(env, "Invalid digest: %s", *digest);
         return Nothing<bool>();
       }
     }
@@ -163,8 +163,8 @@ Maybe<bool> RsaKeyGenTraits::AdditionalConfig(
       Utf8Value digest(env->isolate(), args[*offset + 1]);
       params->params.mgf1_md = EVP_get_digestbyname(*digest);
       if (params->params.mgf1_md == nullptr) {
-        THROW_ERR_CRYPTO_INVALID_DIGEST(env,
-          "mgf1_md specifies an invalid digest");
+        THROW_ERR_CRYPTO_INVALID_DIGEST(
+            env, "Invalid MGF1 digest: %s", *digest);
         return Nothing<bool>();
       }
     }

test/parallel/test-crypto-keygen.js

@@ -1549,7 +1549,7 @@ const sec1EncExp = (cipher) => getRegExpForPEM('EC PRIVATE KEY', cipher);
   }, common.mustNotCall()), {
     name: 'TypeError',
     code: 'ERR_CRYPTO_INVALID_DIGEST',
-    message: 'md specifies an invalid digest'
+    message: 'Invalid digest: sha2'
   });
 
   assert.throws(() => generateKeyPair('rsa-pss', {
@@ -1558,7 +1558,7 @@ const sec1EncExp = (cipher) => getRegExpForPEM('EC PRIVATE KEY', cipher);
   }, common.mustNotCall()), {
     name: 'TypeError',
     code: 'ERR_CRYPTO_INVALID_DIGEST',
-    message: 'mgf1_md specifies an invalid digest'
+    message: 'Invalid MGF1 digest: sha2'
   });
 }