DEREncode issue when upgrading from 5.6.3 to 8.2.0.

Hello list,

I am currently upgrading our Crypto++ from 5.6.3 to 8.2.0.  We have some 
code that compiled fine under 5.6.3, but breaks under 8.2.0.  To me, it 
looks like code that creates a Base64 encoded private/public keypair or 
something:

        CryptoPP::RSAES_OAEP_SHA_Decryptor Decryptor(rng, nrOfBits /*, e 
*/);
        CryptoPP::Base64Encoder priv(new
            CryptoPP::StringSink(privateKey)); // Base64 Encoder
        Decryptor.DEREncode(priv);
        priv.MessageEnd();

        CryptoPP::RSAES_OAEP_SHA_Encryptor Encryptor(Decryptor);
        CryptoPP::Base64Encoder pub(new
            CryptoPP::StringSink(publicKey)); // Base64 Encoder
        Encryptor.DEREncode(pub);
        pub.MessageEnd();

The problem is the calls to DEREncode that worked with 5.6.3 but with 8.2.0 
give the error:

1>... blabla.../PPKStringEncryption.cpp(32,13): error C2039: 'DEREncode': 
is not a member of 
'CryptoPP::PK_FinalTemplate<CryptoPP::TF_DecryptorImpl<CryptoPP::TF_CryptoSchemeOptions<ALG_INFO,KEYS,CryptoPP::OAEP<CryptoPP::SHA1,CryptoPP::P1363_MGF1>>>>'
1>        with
1>        [
1>            
ALG_INFO=CryptoPP::TF_ES<CryptoPP::RSA,CryptoPP::OAEP<CryptoPP::SHA1,CryptoPP::P1363_MGF1>,int>,
1>            KEYS=CryptoPP::RSA
1>        ]
1>...blabla...\ThirdParty\CryptoPP\CryptoPP-custom\pubkey.h(2238): message 
: see declaration of 
'CryptoPP::PK_FinalTemplate<CryptoPP::TF_DecryptorImpl<CryptoPP::TF_CryptoSchemeOptions<ALG_INFO,KEYS,CryptoPP::OAEP<CryptoPP::SHA1,CryptoPP::P1363_MGF1>>>>'
1>        with
1>        [
1>            
ALG_INFO=CryptoPP::TF_ES<CryptoPP::RSA,CryptoPP::OAEP<CryptoPP::SHA1,CryptoPP::P1363_MGF1>,int>,
1>            KEYS=CryptoPP::RSA
1>        ]

I think it has to do with this GitHub issue about removing 
AsymmetricAlgorithm::BERDecode:

https://github.com/weidai11/cryptopp/issues/569

but since the code is heavily templatized and I do not consider myself a 
template expert, I don't know with what to replace the DEREncode calls...  
Any help on that would be appreciated!

Bart

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