SSL_Accept 失败并出现错误 :FFFFFFFF:lib(255):func(4095):reason(4095)

Question

我正在尝试写入 openssl 服务器，但 SSL_Accept 失败并出现错误:FFFFFFFF:lib(255):func(4095):reason(4095)。这个错误代码是什么意思？如何获取 openssl 错误代码的描述？

Answer 1

and SSL_Accept fails with error:FFFFFFFF

0xFFFFFFFF 为 -1。接下来您应该调用 SSL_get_error。来自 SSL_accept(3) :

If the underlying BIO is blocking, SSL_accept() will only return once the handshake has been finished or an error occurred, except for SGC (Server Gated Cryptography). For SGC, SSL_accept() may return with -1, but SSL_get_error() will yield SSL_ERROR_WANT_READ/WRITE and SSL_accept() should be called again.

If the underlying BIO is non-blocking, SSL_accept() will also return when the underlying BIO could not satisfy the needs of SSL_accept() to continue the handshake, indicating the problem by the return value -1. In this case a call to SSL_get_error() with the return value of SSL_accept() will yield SSL_ERROR_WANT_READ or SSL_ERROR_WANT_WRITE. The calling process then must repeat the call after taking appropriate action to satisfy the needs of SSL_accept().