使用Botan进行RSA公有密钥加密

void MainWindow::testRSAPublicKeyEncode() {
    using Botan::byte;
    using Botan::Public_Key;
    using Botan::PK_Encryptor_EME;
    constexpr byte pemData[]=u8R"///(-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDoUaLxcCvcgWzS1ukXC56F9YWx
PlmuwHa9zPFR4+tinzhtG8PRSgPB7UOAzaFu4hKimPOcOrQaRUof/PhSNGxZAhad
d+/kot0I8y7pwzeza9EAEwpQIki7RextKlWDRLRvaQGLjnW7SUrF2k62zJCdtow0
KcfR+Hx1+7Z4wYYFHwIDAQAB
-----END PUBLIC KEY-----
)///";
    Botan::MemoryVector pem(pemData,sizeof(pemData)-1);
    std::unique_ptr publicKey{ Botan::X509::load_key(pem) };
    Botan::AutoSeeded_RNG rng;
    PK_Encryptor_EME en(*publicKey,"EME-PKCS1-v1_5");
    auto ans=en.encrypt((const byte*)"12345",5,rng);
    std::cout<<"encode rsa is : ";
    for (const auto varI:ans) {
        std::cout<