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OpenSSLConnection.cpp
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159 lines (128 loc) · 4.41 KB
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#include "OpenSSLConnection.h"
#ifdef HTTPS_BACKEND_OPENSSL
#include "../common/LibraryLoader.h"
// Not present in openssl 1.1 headers
#define SSL_CTRL_OPTIONS 32
static bool TryOpenLibraries(const char *sslName, LibraryLoader::handle *& sslHandle, const char *cryptoName, LibraryLoader::handle *&cryptoHandle)
{
sslHandle = LibraryLoader::OpenLibrary(sslName);
cryptoHandle = LibraryLoader::OpenLibrary(cryptoName);
if (sslHandle && cryptoHandle)
return true;
if (sslHandle)
LibraryLoader::CloseLibrary(sslHandle);
if (cryptoHandle)
LibraryLoader::CloseLibrary(cryptoHandle);
return false;
}
OpenSSLConnection::SSLFuncs::SSLFuncs()
{
using namespace LibraryLoader;
handle *sslhandle = nullptr;
handle *cryptohandle = nullptr;
valid = TryOpenLibraries("libssl.so.3", sslhandle, "libcrypto.so.3", cryptohandle)
|| TryOpenLibraries("libssl.so.1.1", sslhandle, "libcrypto.so.1.1", cryptohandle)
|| TryOpenLibraries("libssl.so.1.0.0", sslhandle, "libcrypto.so.1.0.0", cryptohandle)
// Try the version-less name last, it may not be compatible or tested
|| TryOpenLibraries("libssl.so", sslhandle, "libcrypto.so", cryptohandle);
if (!valid)
return;
valid = true;
valid = valid && (
LoadSymbol(init_ssl, sslhandle, "OPENSSL_init_ssl") ||
LoadSymbol(library_init, sslhandle, "SSL_library_init"));
valid = valid && LoadSymbol(CTX_new, sslhandle, "SSL_CTX_new");
valid = valid && LoadSymbol(CTX_ctrl, sslhandle, "SSL_CTX_ctrl");
if (valid)
LoadSymbol(CTX_set_options, sslhandle, "SSL_CTX_set_options");
valid = valid && LoadSymbol(CTX_set_verify, sslhandle, "SSL_CTX_set_verify");
valid = valid && LoadSymbol(CTX_set_default_verify_paths, sslhandle, "SSL_CTX_set_default_verify_paths");
valid = valid && LoadSymbol(CTX_free, sslhandle, "SSL_CTX_free");
valid = valid && LoadSymbol(SSL_new, sslhandle, "SSL_new");
valid = valid && LoadSymbol(SSL_free, sslhandle, "SSL_free");
valid = valid && LoadSymbol(set_fd, sslhandle, "SSL_set_fd");
valid = valid && LoadSymbol(connect, sslhandle, "SSL_connect");
valid = valid && LoadSymbol(read, sslhandle, "SSL_read");
valid = valid && LoadSymbol(write, sslhandle, "SSL_write");
valid = valid && LoadSymbol(shutdown, sslhandle, "SSL_shutdown");
valid = valid && LoadSymbol(get_verify_result, sslhandle, "SSL_get_verify_result");
valid = valid && (LoadSymbol(get_peer_certificate, sslhandle, "SSL_get1_peer_certificate") ||
LoadSymbol(get_peer_certificate, sslhandle, "SSL_get_peer_certificate"));
valid = valid && (
LoadSymbol(SSLv23_method, sslhandle, "TLS_client_method") ||
LoadSymbol(SSLv23_method, sslhandle, "TLS_method") ||
LoadSymbol(SSLv23_method, sslhandle, "SSLv23_method"));
valid = valid && LoadSymbol(check_host, cryptohandle, "X509_check_host");
valid = valid && LoadSymbol(X509_free, cryptohandle, "X509_free");
if (library_init)
library_init();
else if(init_ssl)
init_ssl(0, nullptr);
// else not valid
}
bool OpenSSLConnection::valid()
{
return ssl.valid;
}
OpenSSLConnection::OpenSSLConnection()
: conn(nullptr)
{
context = ssl.CTX_new(ssl.SSLv23_method());
if (!context)
return;
if (ssl.CTX_set_options)
ssl.CTX_set_options(context, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
else
ssl.CTX_ctrl(context, SSL_CTRL_OPTIONS, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3, nullptr);
ssl.CTX_set_verify(context, SSL_VERIFY_PEER, nullptr);
ssl.CTX_set_default_verify_paths(context);
}
OpenSSLConnection::~OpenSSLConnection()
{
if (conn)
ssl.SSL_free(conn);
if (context)
ssl.CTX_free(context);
}
bool OpenSSLConnection::connect(const std::string &hostname, uint16_t port)
{
if (!context)
return false;
if (!socket.connect(hostname, port))
return false;
conn = ssl.SSL_new(context);
if (!conn)
{
socket.close();
return false;
}
ssl.set_fd(conn, socket.getFd());
if (ssl.connect(conn) != 1 || ssl.get_verify_result(conn) != X509_V_OK)
{
socket.close();
return false;
}
X509 *cert = ssl.get_peer_certificate(conn);
if (ssl.check_host(cert, hostname.c_str(), hostname.size(), 0, nullptr) != 1)
{
close();
return false;
}
ssl.X509_free(cert);
return true;
}
size_t OpenSSLConnection::read(char *buffer, size_t size)
{
return ssl.read(conn, buffer, (int) size);
}
size_t OpenSSLConnection::write(const char *buffer, size_t size)
{
return ssl.write(conn, buffer, (int) size);
}
void OpenSSLConnection::close()
{
ssl.shutdown(conn);
socket.close();
}
OpenSSLConnection::SSLFuncs OpenSSLConnection::ssl;
#endif // HTTPS_BACKEND_OPENSSL