_PEM_write_bio_RSAPrivateKey

var _PEM_write_bio_RSAPrivateKey: function(

  bp: PBIO;

  x: PRSA;

  const enc: PEVP_CIPHER;

  kstr: PIdAnsiChar;

  klen: TIdC_INT;

  cb: ppem_password_cb;

  u: POinter

):TIdC_INT = Nil;