LibCrypto: Parse and store all RSA private key components

Author: https://github.com/alimpfard
Commit: 15836cc865
Pull-request: https://github.com/SerenityOS/serenity/pull/23570
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/Hendiadyoin1

Userland/Libraries/LibCrypto/NumberTheory/ModularFunctions.h

@@ -11,6 +11,7 @@
 
 namespace Crypto::NumberTheory {
 
+UnsignedBigInteger Mod(UnsignedBigInteger const& a, UnsignedBigInteger const& b);
 UnsignedBigInteger ModularInverse(UnsignedBigInteger const& a_, UnsignedBigInteger const& b);
 UnsignedBigInteger ModularPower(UnsignedBigInteger const& b, UnsignedBigInteger const& e, UnsignedBigInteger const& m);