pubkey_ex_i2d
return pubkey_ex_i2d(EVP_PKEY_NONE, pval, out, it);
return pubkey_ex_i2d(EVP_PKEY_RSA, pval, out, it);
return pubkey_ex_i2d(EVP_PKEY_DSA, pval, out, it);
return pubkey_ex_i2d(EVP_PKEY_EC, pval, out, it);