我试图连接我的Qt应用程序之间的SSL套接字(使用QSslSockets)和我的c++服务器运行SSL套接字(使用openssl)..
服务器代码:int create_socket(int port)
{
int s;
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0) {
perror("Unable to create socket");
exit(EXIT_FAILURE);
}
if (bind(s, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
perror("Unable to bind");
exit(EXIT_FAILURE);
}
if (listen(s, 1) < 0) {
perror("Unable to listen");
exit(EXIT_FAILURE);
}
return s;
}
void init_openssl()
{
SSL_load_error_strings();
OpenSSL_add_ssl_algorithms();
}
void cleanup_openssl()
{
EVP_cleanup();
}
SSL_CTX *create_context()
{
const SSL_METHOD *method;
SSL_CTX *ctx;
method = SSLv23_server_method();
ctx = SSL_CTX_new(method);
if (!ctx) {
perror("Unable to create SSL context");
ERR_print_errors_fp(stderr);
exit(EXIT_FAILURE);
}
return ctx;
}
void configure_context(SSL_CTX *ctx)
{
if(SSL_CTX_use_certificate_file(ctx, "/root/myCA/server_crt.pem", SSL_FILETYPE_PEM) > 0)
{
std::cout<<"Cert found"<<std::endl;
}
if (SSL_CTX_use_PrivateKey_file(ctx, "/root/myCA/server_key.pem", SSL_FILETYPE_PEM) > 0 ) {
std::cout<<"Key found"<<std::endl;
}
if(SSL_CTX_check_private_key(ctx) > 0)
{
std::cout<<"Key valid"<<std::endl;
}
}
int main(int argc, char **argv)
{
int sock;
SSL_CTX *ctx;
init_openssl();
ctx = create_context();
configure_context(ctx);
sock = create_socket(3000);
while(1) {
struct sockaddr_in addr;
uint len = sizeof(addr);
SSL *ssl;
const char reply[] = "testn";
int client = accept(sock, (struct sockaddr*)&addr, &len);
if (client > 0) {
std::cout<<"Client accepted..."<<std::endl;
}
else
{
perror("Unable to accept");
exit(EXIT_FAILURE);
}
ssl = SSL_new(ctx);
SSL_set_fd(ssl, client);
if (SSL_accept(ssl) <= 0) {
ERR_print_errors_fp(stderr);
}
else {
SSL_write(ssl, reply, strlen(reply));
}
SSL_free(ssl);
close(client);
}
close(sock);
SSL_CTX_free(ctx);
cleanup_openssl();
}
Qt客户端代码: SSLSOCKET::SSLSOCKET(QObject *parent):QObject(parent)
{
connect(&client,SIGNAL(encrypted()),this,SLOT(ConnectionEstablished()));
connect(&client,SIGNAL(sslErrors(const QList<QSslError>&)),this,SLOT(ErrorOccured(const QList<QSslError> &)));
QList<QSslCertificate>
trusted_ca=QSslCertificate::fromPath("/Users/test/Desktop/server_crt.pem");
if(trusted_ca.empty())
{
qDebug()<<"Error not trusted Ca.";
}
client.setCaCertificates(trusted_ca);
client.connectToHostEncrypted(*my ip address*,3000);
}
void SSLSOCKET::ErrorOccured(const QList<QSslError> &error)
{
qDebug()<<"ERROR HERE----:";
qDebug()<<error;
}
void SSLSOCKET::ConnectionEstablished()
{
qDebug()<<"CONNECTION WORKED------:";
if(!client.waitForEncrypted())
{
qDebug()<<client.errorString();
}
else
{
qDebug()<<"Encrypted Connection Established...";
}
}
我可以看到客户端和服务器之间的连接,但是client. waitforencrypted()显示'Unknown Error'..
任何想法?
您在connected()
处理程序中调用waitForEncrypted()
。客户机还没有实际发起SSL握手,因此您还不能等待它。根据connectToHostEncrypted()
文档:
在
port
上启动到设备hostname
的加密连接,使用mode
作为OpenMode
。这相当于调用connectToHost()
来建立连接,然后调用startClientEncryption()
。protocol
参数可以用来指定使用哪个网络协议(例如:IPv4或IPv6)。
QSslSocket
首先进入HostLookupState
。然后,在进入事件循环或waitFor...()
函数之一之后,它进入ConnectingState
, 发出connected()
,然后启动SSL客户端握手。每次状态变化时,QSslSocket
发出信号stateChanged()
。
如果你想这样处理connected()
,你将不得不使用connectToHost()
而不是connectToHostEncrypted()
,然后单独调用startClientEncryption()
:
SSLSOCKET::SSLSOCKET(QObject *parent):QObject(parent)
{
connect(&client, SIGNAL(connected()), this, SLOT(ConnectionEstablished()));
...
client.connectToHost(*my ip address*, 3000);
}
void SSLSOCKET::ConnectionEstablished()
{
client.startClientEncryption();
if (!client.waitForEncrypted())
...
}
EDIT:删掉。我以为你在处理connected()
信号,但我现在看到你在处理encrypted()
信号。在这种情况下:
所以你根本不需要使用如果SSL握手成功,
QSslSocket
发出encrypted()
。
waitForEncrypted()
:
void SSLSOCKET::ConnectionEstablished()
{
qDebug()<<"CONNECTION WORKED------:";
qDebug()<<"Encrypted Connection Established...";
}
即使你调用了它,它也应该返回true:
等待,直到套接字完成SSL握手并发出
encrypted()
或msecs
毫秒,以先到者为准。如果encrypted()
已经发出,这个函数返回true;否则(例如,套接字断开连接,或SSL握手失败),返回false。
因此,除非在握手完成后套接字被断开连接,或者在加密状态实际更改之前发出encrypted()
,或者发生其他一些不可预见的错误,否则我看不到waitForEncrypted()
在encrypted()
处理程序中返回false的任何理由。