On Fri, Sep 23, 2011 at 10:04, Earnol <[email protected]> wrote:
> template <typename T>
> void CryptoProviderImpl::keyToString(T const &key, std::string &str)
> {
> CryptoPP::ByteQueue bq;
> key.DEREncode(bq);
> CryptoPP::Base64Encoder bt;
> bq.CopyTo(bt);
> bt.MessageEnd();
> CryptoPP::StringSink store(str);
> bt.CopyTo(store);
> store.MessageEnd();
> }
>
> This is how i convert key to base 64 encoded string.
>
What is T? OpenSSL's RSA utility expects a DER-encoded
SubjectPublicKeyInfo structure which is:
SubjectPublicKeyInfo ::= SEQUENCE {
algorithm AlgorithmIdentifier,
subjectPublicKey BIT STRING }
The piece you're encoding is just the subjectPublicKey field. (For RSA
that's a sequence of 2 integers: the modulus and public exponent.)
Geoff
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