PKAuthContext.prototype.accept = function() {
  if (!this.signature) {
    this._initialResponse = true;
    this._stream.authPKOK(this.key.algo, this.key.data);
  } else {
    AuthContext.prototype.accept.call(this);
  }
};
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.