/*
* Copyright (c) 2011, Jonathan Schleifer <js@webkeks.org>
* Copyright (c) 2011, Florian Zeitz <florob@babelmonkeys.de>
* Copyright (c) 2011, Jos Kuijpers <jos@kuijpersvof.nl>
*
* https://webkeks.org/git/?p=objopenssl.git
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#import <ObjFW/OFThread.h>
#import <ObjFW/OFHTTPRequest.h>
#import <ObjFW/OFDataArray.h>
#import <ObjFW/OFAcceptFailedException.h>
#import <ObjFW/OFConnectionFailedException.h>
#import <ObjFW/OFInitializationFailedException.h>
#import <ObjFW/OFInvalidArgumentException.h>
#import <ObjFW/OFNotConnectedException.h>
#import <ObjFW/OFOutOfRangeException.h>
#import <ObjFW/OFReadFailedException.h>
#import <ObjFW/OFWriteFailedException.h>
#import <ObjFW/macros.h>
#import <ObjFW/threading.h>
#import "SSLSocket.h"
#import "SSLInvalidCertificateException.h"
#import "X509Certificate.h"
#ifndef INVALID_SOCKET
# define INVALID_SOCKET -1
#endif
static SSL_CTX *ctx;
static of_mutex_t *ssl_mutexes;
static unsigned long
get_thread_id(void)
{
return (unsigned long)(uintptr_t)[OFThread currentThread];
}
static void
locking_callback(int mode, int n, const char *file, int line)
{
/*
* This function must handle up to CRYPTO_num_locks() mutexes.
* It must set the n-th lock if mode & CRYPTO_LOCK,
* release it otherwise.
*/
if (mode & CRYPTO_LOCK)
of_mutex_lock(&ssl_mutexes[n]);
else
of_mutex_unlock(&ssl_mutexes[n]);
}
@implementation SSLSocket
+ (void)load
{
of_tls_socket_class = self;
}
+ (void)initialize
{
int m;
if (self != [SSLSocket class])
return;
CRYPTO_set_id_callback(&get_thread_id);
/* Generate number of mutexes needed */
m = CRYPTO_num_locks();
ssl_mutexes = malloc(m * sizeof(of_mutex_t));
for (m--; m >= 0; m--)
of_mutex_new(&ssl_mutexes[m]);
CRYPTO_set_locking_callback(&locking_callback);
SSL_library_init();
if ((ctx = SSL_CTX_new(SSLv23_method())) == NULL)
@throw [OFInitializationFailedException
exceptionWithClass: self];
if ((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) == 0)
@throw [OFInitializationFailedException
exceptionWithClass: self];
if (SSL_CTX_set_default_verify_paths(ctx) == 0)
@throw [OFInitializationFailedException
exceptionWithClass: self];
}
- initWithSocket: (OFTCPSocket*)socket
{
return [self initWithSocket: socket
privateKeyFile: nil
certificateFile: nil];
}
- initWithSocket: (OFTCPSocket*)socket
privateKeyFile: (OFString*)privateKeyFile_
certificateFile: (OFString*)certificateFile_
{
self = [self init];
@try {
/* FIXME: Also allow with accepted sockets */
privateKeyFile = [privateKeyFile_ copy];
certificateFile = [certificateFile_ copy];
sock = dup(socket->sock);
if ((ssl = SSL_new(ctx)) == NULL || !SSL_set_fd(ssl, sock)) {
close(sock);
sock = INVALID_SOCKET;
@throw [OFInitializationFailedException
exceptionWithClass: [self class]];
}
SSL_set_connect_state(ssl);
if ((privateKeyFile != nil && !SSL_use_PrivateKey_file(ssl,
[privateKeyFile cStringUsingEncoding:
OF_STRING_ENCODING_NATIVE], SSL_FILETYPE_PEM)) ||
(certificateFile != nil && !SSL_use_certificate_file(ssl,
[certificateFile cStringUsingEncoding:
OF_STRING_ENCODING_NATIVE], SSL_FILETYPE_PEM)) ||
SSL_connect(ssl) != 1) {
close(sock);
sock = INVALID_SOCKET;
@throw [OFInitializationFailedException
exceptionWithClass: [self class]];
}
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
SSL *ssl_ = ssl;
[privateKeyFile release];
[certificateFile release];
[super dealloc];
if (ssl_ != NULL)
SSL_free(ssl_);
}
- (void)connectToHost: (OFString*)host
port: (uint16_t)port
{
[super connectToHost: host
port: port];
if ((ssl = SSL_new(ctx)) == NULL || !SSL_set_fd(ssl, sock)) {
[super close];
@throw [OFConnectionFailedException
exceptionWithClass: [self class]
socket: self
host: host
port: port];
}
SSL_set_connect_state(ssl);
if ((privateKeyFile != nil && !SSL_use_PrivateKey_file(ssl,
[privateKeyFile cStringUsingEncoding: OF_STRING_ENCODING_NATIVE],
SSL_FILETYPE_PEM)) || (certificateFile != nil &&
!SSL_use_certificate_file(ssl, [certificateFile
cStringUsingEncoding: OF_STRING_ENCODING_NATIVE],
SSL_FILETYPE_PEM)) || SSL_connect(ssl) != 1) {
[super close];
@throw [OFConnectionFailedException
exceptionWithClass: [self class]
socket: self
host: host
port: port];
}
}
- (SSLSocket*)accept
{
SSLSocket *newSocket = (SSLSocket*)[super accept];
if ((newSocket->ssl = SSL_new(ctx)) == NULL ||
!SSL_set_fd(newSocket->ssl, newSocket->sock)) {
/* We only want to close the OFTCPSocket */
object_setClass(newSocket, [OFTCPSocket class]);
[newSocket close];
object_setClass(newSocket, object_getClass(self));
@throw [OFAcceptFailedException exceptionWithClass: [self class]
socket: self];
}
SSL_set_accept_state(newSocket->ssl);
if (!SSL_use_PrivateKey_file(newSocket->ssl, [privateKeyFile
cStringUsingEncoding: OF_STRING_ENCODING_NATIVE],
SSL_FILETYPE_PEM) || !SSL_use_certificate_file(newSocket->ssl,
[certificateFile cStringUsingEncoding: OF_STRING_ENCODING_NATIVE],
SSL_FILETYPE_PEM) || SSL_accept(newSocket->ssl) != 1) {
/* We only want to close the OFTCPSocket */
object_setClass(newSocket, [OFTCPSocket class]);
[newSocket close];
object_setClass(newSocket, object_getClass(self));
@throw [OFAcceptFailedException exceptionWithClass: [self class]
socket: self];
}
return newSocket;
}
- (void)close
{
if (ssl != NULL)
SSL_shutdown(ssl);
[super close];
}
- (size_t)lowlevelReadIntoBuffer: (void*)buffer
length: (size_t)length
{
ssize_t ret;
if (length > INT_MAX)
@throw [OFOutOfRangeException exceptionWithClass: [self class]];
if (sock == INVALID_SOCKET)
@throw [OFNotConnectedException exceptionWithClass: [self class]
socket: self];
if (atEndOfStream) {
OFReadFailedException *e;
e = [OFReadFailedException exceptionWithClass: [self class]
stream: self
requestedLength: length];
#ifndef _WIN32
e->errNo = ENOTCONN;
#else
e->errNo = WSAENOTCONN;
#endif
@throw e;
}
if ((ret = SSL_read(ssl, buffer, (int)length)) < 0) {
if (SSL_get_error(ssl, ret) == SSL_ERROR_WANT_READ)
return 0;
@throw [OFReadFailedException exceptionWithClass: [self class]
stream: self
requestedLength: length];
}
if (ret == 0)
atEndOfStream = YES;
return ret;
}
- (void)lowlevelWriteBuffer: (const void*)buffer
length: (size_t)length
{
if (length > INT_MAX)
@throw [OFOutOfRangeException exceptionWithClass: [self class]];
if (sock == INVALID_SOCKET)
@throw [OFNotConnectedException exceptionWithClass: [self class]
socket: self];
if (atEndOfStream) {
OFWriteFailedException *e;
e = [OFWriteFailedException exceptionWithClass: [self class]
stream: self
requestedLength: length];
#ifndef _WIN32
e->errNo = ENOTCONN;
#else
e->errNo = WSAENOTCONN;
#endif
@throw e;
}
if (SSL_write(ssl, buffer, (int)length) < length)
@throw [OFWriteFailedException exceptionWithClass: [self class]
stream: self
requestedLength: length];
}
- (size_t)pendingBytes
{
if (ssl == NULL)
return [super pendingBytes];
return [super pendingBytes] + SSL_pending(ssl);
}
- (void)setPrivateKeyFile: (OFString*)file
{
OF_SETTER(privateKeyFile, file, YES, YES)
}
- (OFString*)privateKeyFile
{
OF_GETTER(privateKeyFile, YES)
}
- (void)setCertificateFile: (OFString*)file
{
OF_SETTER(certificateFile, file, YES, YES)
}
- (OFString*)certificateFile
{
OF_GETTER(certificateFile, YES)
}
- (OFDataArray*)channelBindingDataWithType: (OFString*)type
{
size_t length;
char buffer[64];
OFDataArray *data;
if (![type isEqual: @"tls-unique"])
@throw [OFInvalidArgumentException
exceptionWithClass: [self class]
selector: _cmd];
if (SSL_session_reused(ssl) ^ !listening) {
/*
* We are either client or the session has been resumed
* => we have sent the finished message
*/
length = SSL_get_finished(ssl, buffer, 64);
} else {
/* peer sent the finished message */
length = SSL_get_peer_finished(ssl, buffer, 64);
}
data = [OFDataArray dataArray];
[data addItems: buffer
count: length];
return data;
}
- (X509Certificate*)peerCertificate
{
X509 *certificate = SSL_get_peer_certificate(ssl);
if (!certificate)
return nil;
return [[[X509Certificate alloc]
initWithX509Struct: certificate] autorelease];
}
- (void)verifyPeerCertificate
{
unsigned long ret;
if (SSL_get_peer_certificate(ssl) != NULL) {
if ((ret = SSL_get_verify_result(ssl)) != X509_V_OK) {
const char *tmp = X509_verify_cert_error_string(ret);
OFString *reason = [OFString stringWithUTF8String: tmp];
@throw [SSLInvalidCertificateException
exceptionWithClass: [self class]
reason: reason];
}
} else
@throw [SSLInvalidCertificateException
exceptionWithClass: [self class]
reason: @"No certificate"];
}
@end