crypto: support SLH-DSA KeyObject, sign, and verify

PR-URL: nodejs/node#59537
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: panva

src/ncrypto.cpp

@@ -39,6 +39,18 @@ constexpr static PQCMapping pqc_mappings[] = {
     {"ML-KEM-512", EVP_PKEY_ML_KEM_512},
     {"ML-KEM-768", EVP_PKEY_ML_KEM_768},
     {"ML-KEM-1024", EVP_PKEY_ML_KEM_1024},
+    {"SLH-DSA-SHA2-128f", EVP_PKEY_SLH_DSA_SHA2_128F},
+    {"SLH-DSA-SHA2-128s", EVP_PKEY_SLH_DSA_SHA2_128S},
+    {"SLH-DSA-SHA2-192f", EVP_PKEY_SLH_DSA_SHA2_192F},
+    {"SLH-DSA-SHA2-192s", EVP_PKEY_SLH_DSA_SHA2_192S},
+    {"SLH-DSA-SHA2-256f", EVP_PKEY_SLH_DSA_SHA2_256F},
+    {"SLH-DSA-SHA2-256s", EVP_PKEY_SLH_DSA_SHA2_256S},
+    {"SLH-DSA-SHAKE-128f", EVP_PKEY_SLH_DSA_SHAKE_128F},
+    {"SLH-DSA-SHAKE-128s", EVP_PKEY_SLH_DSA_SHAKE_128S},
+    {"SLH-DSA-SHAKE-192f", EVP_PKEY_SLH_DSA_SHAKE_192F},
+    {"SLH-DSA-SHAKE-192s", EVP_PKEY_SLH_DSA_SHAKE_192S},
+    {"SLH-DSA-SHAKE-256f", EVP_PKEY_SLH_DSA_SHAKE_256F},
+    {"SLH-DSA-SHAKE-256s", EVP_PKEY_SLH_DSA_SHAKE_256S},
 };
 
 #endif
@@ -2596,6 +2608,18 @@ bool EVPKeyPointer::isOneShotVariant() const {
     case EVP_PKEY_ML_DSA_44:
     case EVP_PKEY_ML_DSA_65:
     case EVP_PKEY_ML_DSA_87:
+    case EVP_PKEY_SLH_DSA_SHA2_128F:
+    case EVP_PKEY_SLH_DSA_SHA2_128S:
+    case EVP_PKEY_SLH_DSA_SHA2_192F:
+    case EVP_PKEY_SLH_DSA_SHA2_192S:
+    case EVP_PKEY_SLH_DSA_SHA2_256F:
+    case EVP_PKEY_SLH_DSA_SHA2_256S:
+    case EVP_PKEY_SLH_DSA_SHAKE_128F:
+    case EVP_PKEY_SLH_DSA_SHAKE_128S:
+    case EVP_PKEY_SLH_DSA_SHAKE_192F:
+    case EVP_PKEY_SLH_DSA_SHAKE_192S:
+    case EVP_PKEY_SLH_DSA_SHAKE_256F:
+    case EVP_PKEY_SLH_DSA_SHAKE_256S:
 #endif
       return true;
     default: