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/*
* connection.c
*
* Copyright (C) AB Strakt
* Copyright (C) Jean-Paul Calderone
* See LICENSE for details.
*
* SSL Connection objects and methods.
* See the file RATIONALE for a short explanation of why this module was written.
*
* Reviewed 2001-07-23
*/
#include <Python.h>
#ifndef MS_WINDOWS
# include <sys/socket.h>
# include <netinet/in.h>
# if !(defined(__BEOS__) || defined(__CYGWIN__))
# include <netinet/tcp.h>
# endif
#else
# include <winsock.h>
# include <wincrypt.h>
#endif
#define SSL_MODULE
#include <openssl/bio.h>
#include <openssl/err.h>
#include "ssl.h"
/**
* If we are on UNIX, fine, just use PyErr_SetFromErrno. If we are on Windows,
* apply some black winsock voodoo. This is basically just copied from Python's
* socketmodule.c
*
* Arguments: None
* Returns: None
*/
static void
syscall_from_errno(void)
{
#ifdef MS_WINDOWS
int errnum = WSAGetLastError();
if (errnum)
{
static struct { int num; const char *msg; } *msgp, msgs[] = {
{ WSAEINTR, "Interrupted system call" },
{ WSAEBADF, "Bad file descriptor" },
{ WSAEACCES, "Permission denied" },
{ WSAEFAULT, "Bad address" },
{ WSAEINVAL, "Invalid argument" },
{ WSAEMFILE, "Too many open files" },
{ WSAEWOULDBLOCK, "The socket operation could not complete "
"without blocking" },
{ WSAEINPROGRESS, "Operation now in progress" },
{ WSAEALREADY, "Operation already in progress" },
{ WSAENOTSOCK, "Socket operation on non-socket" },
{ WSAEDESTADDRREQ, "Destination address required" },
{ WSAEMSGSIZE, "Message too long" },
{ WSAEPROTOTYPE, "Protocol wrong type for socket" },
{ WSAENOPROTOOPT, "Protocol not available" },
{ WSAEPROTONOSUPPORT, "Protocol not supported" },
{ WSAESOCKTNOSUPPORT, "Socket type not supported" },
{ WSAEOPNOTSUPP, "Operation not supported" },
{ WSAEPFNOSUPPORT, "Protocol family not supported" },
{ WSAEAFNOSUPPORT, "Address family not supported" },
{ WSAEADDRINUSE, "Address already in use" },
{ WSAEADDRNOTAVAIL, "Can't assign requested address" },
{ WSAENETDOWN, "Network is down" },
{ WSAENETUNREACH, "Network is unreachable" },
{ WSAENETRESET, "Network dropped connection on reset" },
{ WSAECONNABORTED, "Software caused connection abort" },
{ WSAECONNRESET, "Connection reset by peer" },
{ WSAENOBUFS, "No buffer space available" },
{ WSAEISCONN, "Socket is already connected" },
{ WSAENOTCONN, "Socket is not connected" },
{ WSAESHUTDOWN, "Can't send after socket shutdown" },
{ WSAETOOMANYREFS, "Too many references: can't splice" },
{ WSAETIMEDOUT, "Operation timed out" },
{ WSAECONNREFUSED, "Connection refused" },
{ WSAELOOP, "Too many levels of symbolic links" },
{ WSAENAMETOOLONG, "File name too long" },
{ WSAEHOSTDOWN, "Host is down" },
{ WSAEHOSTUNREACH, "No route to host" },
{ WSAENOTEMPTY, "Directory not empty" },
{ WSAEPROCLIM, "Too many processes" },
{ WSAEUSERS, "Too many users" },
{ WSAEDQUOT, "Disc quota exceeded" },
{ WSAESTALE, "Stale NFS file handle" },
{ WSAEREMOTE, "Too many levels of remote in path" },
{ WSASYSNOTREADY, "Network subsystem is unvailable" },
{ WSAVERNOTSUPPORTED, "WinSock version is not supported" },
{ WSANOTINITIALISED, "Successful WSAStartup() not yet performed" },
{ WSAEDISCON, "Graceful shutdown in progress" },
/* Resolver errors */
{ WSAHOST_NOT_FOUND, "No such host is known" },
{ WSATRY_AGAIN, "Host not found, or server failed" },
{ WSANO_RECOVERY, "Unexpected server error encountered" },
{ WSANO_DATA, "Valid name without requested data" },
{ WSANO_ADDRESS, "No address, look for MX record" },
{ 0, NULL }
};
PyObject *v;
const char *msg = "winsock error";
for (msgp = msgs; msgp->msg; msgp++)
{
if (errnum == msgp->num)
{
msg = msgp->msg;
break;
}
}
v = Py_BuildValue("(is)", errnum, msg);
if (v != NULL)
{
PyErr_SetObject(ssl_SysCallError, v);
Py_DECREF(v);
}
return;
}
#else
PyErr_SetFromErrno(ssl_SysCallError);
#endif
}
/*
* Handle errors raised by BIO functions.
*
* Arguments: bio - The BIO object
* ret - The return value of the BIO_ function.
* Returns: None, the calling function should return NULL;
*/
static void
handle_bio_errors(BIO* bio, int ret)
{
if (BIO_should_retry(bio)) {
if (BIO_should_read(bio)) {
PyErr_SetNone(ssl_WantReadError);
} else if (BIO_should_write(bio)) {
PyErr_SetNone(ssl_WantWriteError);
} else if (BIO_should_io_special(bio)) {
/*
* It's somewhat unclear what this means. From the OpenSSL source,
* it seems like it should not be triggered by the memory BIO, so
* for the time being, this case shouldn't come up. The SSL BIO
* (which I think should be named the socket BIO) may trigger this
* case if its socket is not yet connected or it is busy doing
* something related to x509.
*/
PyErr_SetString(PyExc_ValueError, "BIO_should_io_special");
} else {
/*
* I hope this is dead code. The BIO documentation suggests that
* one of the above three checks should always be true.
*/
PyErr_SetString(PyExc_ValueError, "unknown bio failure");
}
} else {
/*
* If we aren't to retry, it's really an error, so fall back to the
* normal error reporting code. However, the BIO interface does not
* specify a uniform error reporting mechanism. We can only hope that
* the code which triggered the error also kindly pushed something onto
* the error stack.
*/
exception_from_error_queue(ssl_Error);
}
}
/*
* Handle errors raised by SSL I/O functions. NOTE: Not SSL_shutdown ;)
*
* Arguments: ssl - The SSL object
* err - The return code from SSL_get_error
* ret - The return code from the SSL I/O function
* Returns: None, the calling function should return NULL
*/
static void
handle_ssl_errors(SSL *ssl, int err, int ret)
{
switch (err)
{
/*
* Strange as it may seem, ZeroReturn is not an error per se. It means
* that the SSL Connection has been closed correctly (note, not the
* transport layer!), i.e. closure alerts have been exchanged. This is
* an exception since
* + There's an SSL "error" code for it
* + You have to deal with it in any case, close the transport layer
* etc
*/
case SSL_ERROR_ZERO_RETURN:
PyErr_SetNone(ssl_ZeroReturnError);
break;
/*
* The WantXYZ exceptions don't mean that there's an error, just that
* nothing could be read/written just now, maybe because the transport
* layer would block on the operation, or that there's not enough data
* available to fill an entire SSL record.
*/
case SSL_ERROR_WANT_READ:
PyErr_SetNone(ssl_WantReadError);
break;
case SSL_ERROR_WANT_WRITE:
PyErr_SetNone(ssl_WantWriteError);
break;
case SSL_ERROR_WANT_X509_LOOKUP:
PyErr_SetNone(ssl_WantX509LookupError);
break;
case SSL_ERROR_SYSCALL:
if (ERR_peek_error() == 0)
{
if (ret < 0)
{
syscall_from_errno();
}
else
{
PyObject *v;
v = Py_BuildValue("(is)", -1, "Unexpected EOF");
if (v != NULL)
{
PyErr_SetObject(ssl_SysCallError, v);
Py_DECREF(v);
}
}
break;
}
/* NOTE: Fall-through here, we don't want to duplicate code, right? */
case SSL_ERROR_SSL:
;
default:
exception_from_error_queue(ssl_Error);
break;
}
}
/*
* Here be member methods of the Connection "class"
*/
static char ssl_Connection_get_context_doc[] = "\n\
Get session context\n\
\n\
@return: A Context object\n\
";
static PyObject *
ssl_Connection_get_context(ssl_ConnectionObj *self, PyObject *args) {
if (!PyArg_ParseTuple(args, ":get_context")) {
return NULL;
}
Py_INCREF(self->context);
return (PyObject *)self->context;
}
static char ssl_Connection_set_context_doc[] = "\n\
Switch this connection to a new session context\n\
\n\
@param context: A L{Context} instance giving the new session context to use.\n\
\n\
";
static PyObject *
ssl_Connection_set_context(ssl_ConnectionObj *self, PyObject *args) {
ssl_ContextObj *ctx;
ssl_ContextObj *old;
if (!PyArg_ParseTuple(args, "O!:set_context", &ssl_Context_Type, &ctx)) {
return NULL;
}
/* This Connection will hold on to this context now. Make sure it stays
* alive.
*/
Py_INCREF(ctx);
/* XXX The unit tests don't actually verify that this call is made.
* They're satisfied if self->context gets updated.
*/
SSL_set_SSL_CTX(self->ssl, ctx->ctx);
/* Swap the old out and the new in.
*/
old = self->context;
self->context = ctx;
/* XXX The unit tests don't verify that this reference is dropped.
*/
Py_DECREF(old);
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_get_servername_doc[] = "\n\
Retrieve the servername extension value if provided in the client hello\n\
message, or None if there wasn't one.\n\
\n\
@return: A byte string giving the server name or C{None}.\n\
\n\
";
static PyObject *
ssl_Connection_get_servername(ssl_ConnectionObj *self, PyObject *args) {
int type = TLSEXT_NAMETYPE_host_name;
const char *name;
if (!PyArg_ParseTuple(args, ":get_servername")) {
return NULL;
}
name = SSL_get_servername(self->ssl, type);
if (name == NULL) {
Py_INCREF(Py_None);
return Py_None;
} else {
return PyBytes_FromString(name);
}
}
static char ssl_Connection_set_tlsext_host_name_doc[] = "\n\
Set the value of the servername extension to send in the client hello.\n\
\n\
@param name: A byte string giving the name.\n\
\n\
";
static PyObject *
ssl_Connection_set_tlsext_host_name(ssl_ConnectionObj *self, PyObject *args) {
char *buf;
if (!PyArg_ParseTuple(args, BYTESTRING_FMT ":set_tlsext_host_name", &buf)) {
return NULL;
}
/* XXX I guess this can fail sometimes? */
SSL_set_tlsext_host_name(self->ssl, buf);
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_pending_doc[] = "\n\
Get the number of bytes that can be safely read from the connection\n\
\n\
@return: The number of bytes available in the receive buffer.\n\
";
static PyObject *
ssl_Connection_pending(ssl_ConnectionObj *self, PyObject *args) {
int ret;
if (!PyArg_ParseTuple(args, ":pending")) {
return NULL;
}
ret = SSL_pending(self->ssl);
return PyLong_FromLong((long)ret);
}
static char ssl_Connection_bio_write_doc[] = "\n\
When using non-socket connections this function sends\n\
\"dirty\" data that would have traveled in on the network.\n\
\n\
@param buf: The string to put into the memory BIO.\n\
@return: The number of bytes written\n\
";
static PyObject *
ssl_Connection_bio_write(ssl_ConnectionObj *self, PyObject *args)
{
char *buf;
int len, ret;
if (self->into_ssl == NULL)
{
PyErr_SetString(PyExc_TypeError, "Connection sock was not None");
return NULL;
}
if (!PyArg_ParseTuple(args, "s#|i:bio_write", &buf, &len))
return NULL;
ret = BIO_write(self->into_ssl, buf, len);
if (PyErr_Occurred())
{
flush_error_queue();
return NULL;
}
if (ret <= 0) {
/*
* There was a problem with the BIO_write of some sort.
*/
handle_bio_errors(self->into_ssl, ret);
return NULL;
}
return PyLong_FromLong((long)ret);
}
static char ssl_Connection_send_doc[] = "\n\
Send data on the connection. NOTE: If you get one of the WantRead,\n\
WantWrite or WantX509Lookup exceptions on this, you have to call the\n\
method again with the SAME buffer.\n\
\n\
@param buf: The string to send\n\
@param flags: (optional) Included for compatibility with the socket\n\
API, the value is ignored\n\
@return: The number of bytes written\n\
";
static PyObject *
ssl_Connection_send(ssl_ConnectionObj *self, PyObject *args) {
int len, ret, err, flags;
char *buf;
#if PY_VERSION_HEX >= 0x02060000
Py_buffer pbuf;
if (!PyArg_ParseTuple(args, "s*|i:send", &pbuf, &flags))
return NULL;
buf = pbuf.buf;
len = pbuf.len;
#else
if (!PyArg_ParseTuple(args, "s#|i:send", &buf, &len, &flags))
return NULL;
#endif
MY_BEGIN_ALLOW_THREADS(self->tstate)
ret = SSL_write(self->ssl, buf, len);
MY_END_ALLOW_THREADS(self->tstate)
#if PY_VERSION_HEX >= 0x02060000
PyBuffer_Release(&pbuf);
#endif
if (PyErr_Occurred())
{
flush_error_queue();
return NULL;
}
err = SSL_get_error(self->ssl, ret);
if (err == SSL_ERROR_NONE)
{
return PyLong_FromLong((long)ret);
}
else
{
handle_ssl_errors(self->ssl, err, ret);
return NULL;
}
}
static char ssl_Connection_sendall_doc[] = "\n\
Send \"all\" data on the connection. This calls send() repeatedly until\n\
all data is sent. If an error occurs, it's impossible to tell how much data\n\
has been sent.\n\
\n\
@param buf: The string to send\n\
@param flags: (optional) Included for compatibility with the socket\n\
API, the value is ignored\n\
@return: The number of bytes written\n\
";
static PyObject *
ssl_Connection_sendall(ssl_ConnectionObj *self, PyObject *args)
{
char *buf;
int len, ret, err, flags;
PyObject *pyret = Py_None;
#if PY_VERSION_HEX >= 0x02060000
Py_buffer pbuf;
if (!PyArg_ParseTuple(args, "s*|i:sendall", &pbuf, &flags))
return NULL;
buf = pbuf.buf;
len = pbuf.len;
#else
if (!PyArg_ParseTuple(args, "s#|i:sendall", &buf, &len, &flags))
return NULL;
#endif
do {
MY_BEGIN_ALLOW_THREADS(self->tstate)
ret = SSL_write(self->ssl, buf, len);
MY_END_ALLOW_THREADS(self->tstate)
if (PyErr_Occurred())
{
flush_error_queue();
pyret = NULL;
break;
}
err = SSL_get_error(self->ssl, ret);
if (err == SSL_ERROR_NONE)
{
buf += ret;
len -= ret;
}
else if (err == SSL_ERROR_SSL || err == SSL_ERROR_SYSCALL ||
err == SSL_ERROR_ZERO_RETURN)
{
handle_ssl_errors(self->ssl, err, ret);
pyret = NULL;
break;
}
} while (len > 0);
#if PY_VERSION_HEX >= 0x02060000
PyBuffer_Release(&pbuf);
#endif
Py_XINCREF(pyret);
return pyret;
}
static char ssl_Connection_recv_doc[] = "\n\
Receive data on the connection. NOTE: If you get one of the WantRead,\n\
WantWrite or WantX509Lookup exceptions on this, you have to call the\n\
method again with the SAME buffer.\n\
\n\
@param bufsiz: The maximum number of bytes to read\n\
@param flags: (optional) Included for compatibility with the socket\n\
API, the value is ignored\n\
@return: The string read from the Connection\n\
";
static PyObject *
ssl_Connection_recv(ssl_ConnectionObj *self, PyObject *args)
{
int bufsiz, ret, err, flags;
PyObject *buf;
if (!PyArg_ParseTuple(args, "i|i:recv", &bufsiz, &flags))
return NULL;
buf = PyBytes_FromStringAndSize(NULL, bufsiz);
if (buf == NULL)
return NULL;
MY_BEGIN_ALLOW_THREADS(self->tstate)
ret = SSL_read(self->ssl, PyBytes_AsString(buf), bufsiz);
MY_END_ALLOW_THREADS(self->tstate)
if (PyErr_Occurred())
{
Py_DECREF(buf);
flush_error_queue();
return NULL;
}
err = SSL_get_error(self->ssl, ret);
if (err == SSL_ERROR_NONE)
{
if (ret != bufsiz && _PyBytes_Resize(&buf, ret) < 0)
return NULL;
return buf;
}
else
{
handle_ssl_errors(self->ssl, err, ret);
Py_DECREF(buf);
return NULL;
}
}
static char ssl_Connection_bio_read_doc[] = "\n\
When using non-socket connections this function reads\n\
the \"dirty\" data that would have traveled away on the network.\n\
\n\
@param bufsiz: The maximum number of bytes to read\n\
@return: The string read.\n\
";
static PyObject *
ssl_Connection_bio_read(ssl_ConnectionObj *self, PyObject *args)
{
int bufsiz, ret;
PyObject *buf;
if (self->from_ssl == NULL)
{
PyErr_SetString(PyExc_TypeError, "Connection sock was not None");
return NULL;
}
if (!PyArg_ParseTuple(args, "i:bio_read", &bufsiz))
return NULL;
buf = PyBytes_FromStringAndSize(NULL, bufsiz);
if (buf == NULL)
return NULL;
ret = BIO_read(self->from_ssl, PyBytes_AsString(buf), bufsiz);
if (PyErr_Occurred())
{
Py_DECREF(buf);
flush_error_queue();
return NULL;
}
if (ret <= 0) {
/*
* There was a problem with the BIO_read of some sort.
*/
handle_bio_errors(self->from_ssl, ret);
Py_DECREF(buf);
return NULL;
}
/*
* Shrink the string to match the number of bytes we actually read.
*/
if (ret != bufsiz && _PyBytes_Resize(&buf, ret) < 0)
{
Py_DECREF(buf);
return NULL;
}
return buf;
}
static char ssl_Connection_renegotiate_doc[] = "\n\
Renegotiate the session\n\
\n\
@return: True if the renegotiation can be started, false otherwise\n\
";
static PyObject *
ssl_Connection_renegotiate(ssl_ConnectionObj *self, PyObject *args) {
int ret;
if (!PyArg_ParseTuple(args, ":renegotiate")) {
return NULL;
}
MY_BEGIN_ALLOW_THREADS(self->tstate);
ret = SSL_renegotiate(self->ssl);
MY_END_ALLOW_THREADS(self->tstate);
if (PyErr_Occurred()) {
flush_error_queue();
return NULL;
}
return PyLong_FromLong((long)ret);
}
static char ssl_Connection_do_handshake_doc[] = "\n\
Perform an SSL handshake (usually called after renegotiate() or one of\n\
set_*_state()). This can raise the same exceptions as send and recv.\n\
\n\
@return: None.\n\
";
static PyObject *
ssl_Connection_do_handshake(ssl_ConnectionObj *self, PyObject *args)
{
int ret, err;
if (!PyArg_ParseTuple(args, ":do_handshake"))
return NULL;
MY_BEGIN_ALLOW_THREADS(self->tstate);
ret = SSL_do_handshake(self->ssl);
MY_END_ALLOW_THREADS(self->tstate);
if (PyErr_Occurred())
{
flush_error_queue();
return NULL;
}
err = SSL_get_error(self->ssl, ret);
if (err == SSL_ERROR_NONE)
{
Py_INCREF(Py_None);
return Py_None;
}
else
{
handle_ssl_errors(self->ssl, err, ret);
return NULL;
}
}
#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x00907000L
static char ssl_Connection_renegotiate_pending_doc[] = "\n\
Check if there's a renegotiation in progress, it will return false once\n\
a renegotiation is finished.\n\
\n\
@return: Whether there's a renegotiation in progress\n\
";
static PyObject *
ssl_Connection_renegotiate_pending(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":renegotiate_pending"))
return NULL;
return PyLong_FromLong((long)SSL_renegotiate_pending(self->ssl));
}
#endif
static char ssl_Connection_total_renegotiations_doc[] = "\n\
Find out the total number of renegotiations.\n\
\n\
@return: The number of renegotiations.\n\
";
static PyObject *
ssl_Connection_total_renegotiations(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":total_renegotiations"))
return NULL;
return PyLong_FromLong(SSL_total_renegotiations(self->ssl));
}
static char ssl_Connection_set_accept_state_doc[] = "\n\
Set the connection to work in server mode. The handshake will be handled\n\
automatically by read/write.\n\
\n\
@return: None\n\
";
static PyObject *
ssl_Connection_set_accept_state(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":set_accept_state"))
return NULL;
SSL_set_accept_state(self->ssl);
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_set_connect_state_doc[] = "\n\
Set the connection to work in client mode. The handshake will be handled\n\
automatically by read/write.\n\
\n\
@return: None\n\
";
static PyObject *
ssl_Connection_set_connect_state(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":set_connect_state"))
return NULL;
SSL_set_connect_state(self->ssl);
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_connect_doc[] = "\n\
Connect to remote host and set up client-side SSL\n\
\n\
@param addr: A remote address\n\
@return: What the socket's connect method returns\n\
";
static PyObject *
ssl_Connection_connect(ssl_ConnectionObj *self, PyObject *args)
{
PyObject *meth, *ret;
if ((meth = PyObject_GetAttrString(self->socket, "connect")) == NULL)
return NULL;
SSL_set_connect_state(self->ssl);
ret = PyEval_CallObject(meth, args);
Py_DECREF(meth);
if (ret == NULL)
return NULL;
return ret;
}
static char ssl_Connection_connect_ex_doc[] = "\n\
Connect to remote host and set up client-side SSL. Note that if the socket's\n\
connect_ex method doesn't return 0, SSL won't be initialized.\n\
\n\
@param addr: A remove address\n\
@return: What the socket's connect_ex method returns\n\
";
static PyObject *
ssl_Connection_connect_ex(ssl_ConnectionObj *self, PyObject *args)
{
PyObject *meth, *ret;
if ((meth = PyObject_GetAttrString(self->socket, "connect_ex")) == NULL)
return NULL;
SSL_set_connect_state(self->ssl);
ret = PyEval_CallObject(meth, args);
Py_DECREF(meth);
return ret;
}
static char ssl_Connection_accept_doc[] = "\n\
Accept incoming connection and set up SSL on it\n\
\n\
@return: A (conn,addr) pair where conn is a Connection and addr is an\n\
address\n\
";
static PyObject *
ssl_Connection_accept(ssl_ConnectionObj *self, PyObject *args)
{
PyObject *tuple, *socket, *address, *meth;
ssl_ConnectionObj *conn;
if ((meth = PyObject_GetAttrString(self->socket, "accept")) == NULL)
return NULL;
tuple = PyEval_CallObject(meth, args);
Py_DECREF(meth);
if (tuple == NULL)
return NULL;
socket = PyTuple_GetItem(tuple, 0);
Py_INCREF(socket);
address = PyTuple_GetItem(tuple, 1);
Py_INCREF(address);
Py_DECREF(tuple);
conn = ssl_Connection_New(self->context, socket);
Py_DECREF(socket);
if (conn == NULL)
{
Py_DECREF(address);
return NULL;
}
SSL_set_accept_state(conn->ssl);
tuple = Py_BuildValue("(OO)", conn, address);
Py_DECREF(conn);
Py_DECREF(address);
return tuple;
}
static char ssl_Connection_bio_shutdown_doc[] = "\n\
When using non-socket connections this function signals end of\n\
data on the input for this connection.\n\
\n\
@return: None\n\
";
static PyObject *
ssl_Connection_bio_shutdown(ssl_ConnectionObj *self, PyObject *args)
{
if (self->from_ssl == NULL)
{
PyErr_SetString(PyExc_TypeError, "Connection sock was not None");
return NULL;
}
BIO_set_mem_eof_return(self->into_ssl, 0);
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_shutdown_doc[] = "\n\
Send closure alert\n\
\n\
@return: True if the shutdown completed successfully (i.e. both sides\n\
have sent closure alerts), false otherwise (i.e. you have to\n\
wait for a ZeroReturnError on a recv() method call\n\
";
static PyObject *
ssl_Connection_shutdown(ssl_ConnectionObj *self, PyObject *args)
{
int ret;
if (!PyArg_ParseTuple(args, ":shutdown"))
return NULL;
MY_BEGIN_ALLOW_THREADS(self->tstate)
ret = SSL_shutdown(self->ssl);
MY_END_ALLOW_THREADS(self->tstate)
if (PyErr_Occurred())
{
flush_error_queue();
return NULL;
}
if (ret < 0)
{
exception_from_error_queue(ssl_Error);
return NULL;
}
else if (ret > 0)
{
Py_INCREF(Py_True);
return Py_True;
}
else
{
Py_INCREF(Py_False);
return Py_False;
}
}
static char ssl_Connection_get_cipher_list_doc[] = "\n\
Get the session cipher list\n\
\n\
@return: A list of cipher strings\n\
";
static PyObject *
ssl_Connection_get_cipher_list(ssl_ConnectionObj *self, PyObject *args)
{
int idx = 0;
const char *ret;
PyObject *lst, *item;
if (!PyArg_ParseTuple(args, ":get_cipher_list"))
return NULL;
lst = PyList_New(0);
while ((ret = SSL_get_cipher_list(self->ssl, idx)) != NULL)
{
item = PyText_FromString(ret);
PyList_Append(lst, item);
Py_DECREF(item);
idx++;
}
return lst;
}
static char ssl_Connection_get_client_ca_list_doc[] = "\n\
Get CAs whose certificates are suggested for client authentication.\n\
\n\
@return: If this is a server connection, a list of X509Names representing\n\
the acceptable CAs as set by L{OpenSSL.SSL.Context.set_client_ca_list} or\n\
L{OpenSSL.SSL.Context.add_client_ca}. If this is a client connection,\n\
the list of such X509Names sent by the server, or an empty list if that\n\
has not yet happened.\n\
";
static PyObject *
ssl_Connection_get_client_ca_list(ssl_ConnectionObj *self, PyObject *args) {
STACK_OF(X509_NAME) *CANames;
PyObject *CAList;
int i, n;
if (!PyArg_ParseTuple(args, ":get_client_ca_list")) {
return NULL;
}
CANames = SSL_get_client_CA_list(self->ssl);
if (CANames == NULL) {
return PyList_New(0);
}
n = sk_X509_NAME_num(CANames);
CAList = PyList_New(n);
if (CAList == NULL) {
return NULL;
}
for (i = 0; i < n; i++) {
X509_NAME *CAName;
PyObject *CA;
CAName = X509_NAME_dup(sk_X509_NAME_value(CANames, i));
if (CAName == NULL) {
Py_DECREF(CAList);
exception_from_error_queue(ssl_Error);
return NULL;
}
CA = (PyObject *)new_x509name(CAName, 1);
if (CA == NULL) {
X509_NAME_free(CAName);
Py_DECREF(CAList);
return NULL;
}
if (PyList_SetItem(CAList, i, CA)) {
Py_DECREF(CA);
Py_DECREF(CAList);
return NULL;
}
}
return CAList;
}
static char ssl_Connection_makefile_doc[] = "\n\
The makefile() method is not implemented, since there is no dup semantics\n\
for SSL connections\n\
\n\
@raise NotImplementedError\n\
";
static PyObject *
ssl_Connection_makefile(ssl_ConnectionObj *self, PyObject *args)
{
PyErr_SetString(PyExc_NotImplementedError, "Cannot make file object of SSL.Connection");
return NULL;
}
static char ssl_Connection_get_app_data_doc[] = "\n\
Get application data\n\
\n\
@return: The application data\n\
";
static PyObject *
ssl_Connection_get_app_data(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":get_app_data"))
return NULL;
Py_INCREF(self->app_data);
return self->app_data;
}
static char ssl_Connection_set_app_data_doc[] = "\n\
Set application data\n\
\n\
@param data - The application data\n\
@return: None\n\
";
static PyObject *
ssl_Connection_set_app_data(ssl_ConnectionObj *self, PyObject *args)
{
PyObject *data;
if (!PyArg_ParseTuple(args, "O:set_app_data", &data))
return NULL;
Py_DECREF(self->app_data);
Py_INCREF(data);
self->app_data = data;
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_get_shutdown_doc[] = "\n\
Get shutdown state\n\
\n\
@return: The shutdown state, a bitvector of SENT_SHUTDOWN, RECEIVED_SHUTDOWN.\n\
";
static PyObject *
ssl_Connection_get_shutdown(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":get_shutdown"))
return NULL;
return PyLong_FromLong((long)SSL_get_shutdown(self->ssl));
}
static char ssl_Connection_set_shutdown_doc[] = "\n\
Set shutdown state\n\
\n\
@param state - bitvector of SENT_SHUTDOWN, RECEIVED_SHUTDOWN.\n\
@return: None\n\
";
static PyObject *
ssl_Connection_set_shutdown(ssl_ConnectionObj *self, PyObject *args)
{
int shutdown;
if (!PyArg_ParseTuple(args, "i:set_shutdown", &shutdown))
return NULL;
SSL_set_shutdown(self->ssl, shutdown);
Py_INCREF(Py_None);
return Py_None;
}
static char ssl_Connection_state_string_doc[] = "\n\
Get a verbose state description\n\
\n\
@return: A string representing the state\n\
";
static PyObject *
ssl_Connection_state_string(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":state_string"))
return NULL;
return PyText_FromString(SSL_state_string_long(self->ssl));
}
static char ssl_Connection_client_random_doc[] = "\n\
Get a copy of the client hello nonce.\n\
\n\
@return: A string representing the state\n\
";
static PyObject *
ssl_Connection_client_random(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":client_random"))
return NULL;
if (self->ssl->session == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyBytes_FromStringAndSize( (const char *) self->ssl->s3->client_random, SSL3_RANDOM_SIZE);
}
static char ssl_Connection_server_random_doc[] = "\n\
Get a copy of the server hello nonce.\n\
\n\
@return: A string representing the state\n\
";
static PyObject *
ssl_Connection_server_random(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":server_random"))
return NULL;
if (self->ssl->session == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyBytes_FromStringAndSize( (const char *) self->ssl->s3->server_random, SSL3_RANDOM_SIZE);
}
static char ssl_Connection_master_key_doc[] = "\n\
Get a copy of the master key.\n\
\n\
@return: A string representing the state\n\
";
static PyObject *
ssl_Connection_master_key(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":master_key"))
return NULL;
if (self->ssl->session == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyBytes_FromStringAndSize( (const char *) self->ssl->session->master_key, self->ssl->session->master_key_length);
}
static char ssl_Connection_sock_shutdown_doc[] = "\n\
See shutdown(2)\n\
\n\
@return: What the socket's shutdown() method returns\n\
";
static PyObject *
ssl_Connection_sock_shutdown(ssl_ConnectionObj *self, PyObject *args)
{
PyObject *meth, *ret;
if ((meth = PyObject_GetAttrString(self->socket, "shutdown")) == NULL)
return NULL;
ret = PyEval_CallObject(meth, args);
Py_DECREF(meth);
return ret;
}
static char ssl_Connection_get_peer_certificate_doc[] = "\n\
Retrieve the other side's certificate (if any)\n\
\n\
@return: The peer's certificate\n\
";
static PyObject *
ssl_Connection_get_peer_certificate(ssl_ConnectionObj *self, PyObject *args)
{
X509 *cert;
if (!PyArg_ParseTuple(args, ":get_peer_certificate"))
return NULL;
cert = SSL_get_peer_certificate(self->ssl);
if (cert != NULL)
{
return (PyObject *)new_x509(cert, 1);
}
else
{
Py_INCREF(Py_None);
return Py_None;
}
}
static char ssl_Connection_get_peer_cert_chain_doc[] = "\n\
Retrieve the other side's certificate (if any)\n\
\n\
@return: A list of X509 instances giving the peer's certificate chain,\n\
or None if it does not have one.\n\
";
static PyObject *
ssl_Connection_get_peer_cert_chain(ssl_ConnectionObj *self, PyObject *args) {
STACK_OF(X509) *sk;
PyObject *chain;
crypto_X509Obj *cert;
Py_ssize_t i;
if (!PyArg_ParseTuple(args, ":get_peer_cert_chain")) {
return NULL;
}
sk = SSL_get_peer_cert_chain(self->ssl);
if (sk != NULL) {
chain = PyList_New(sk_X509_num(sk));
for (i = 0; i < sk_X509_num(sk); i++) {
cert = new_x509(sk_X509_value(sk, i), 1);
if (!cert) {
/* XXX Untested */
Py_DECREF(chain);
return NULL;
}
CRYPTO_add(&cert->x509->references, 1, CRYPTO_LOCK_X509);
PyList_SET_ITEM(chain, i, (PyObject *)cert);
}
return chain;
} else {
Py_INCREF(Py_None);
return Py_None;
}
}
static char ssl_Connection_want_read_doc[] = "\n\
Checks if more data has to be read from the transport layer to complete an\n\
operation.\n\
\n\
@return: True iff more data has to be read\n\
";
static PyObject *
ssl_Connection_want_read(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":want_read"))
return NULL;
return PyLong_FromLong((long)SSL_want_read(self->ssl));
}
static char ssl_Connection_want_write_doc[] = "\n\
Checks if there is data to write to the transport layer to complete an\n\
operation.\n\
\n\
@return: True iff there is data to write\n\
";
static PyObject *
ssl_Connection_want_write(ssl_ConnectionObj *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":want_write"))
return NULL;
return PyLong_FromLong((long)SSL_want_write(self->ssl));
}
/*
* Member methods in the Connection object
* ADD_METHOD(name) expands to a correct PyMethodDef declaration
* { 'name', (PyCFunction)ssl_Connection_name, METH_VARARGS }
* for convenience
* ADD_ALIAS(name,real) creates an "alias" of the ssl_Connection_real
* function with the name 'name'
*/
#define ADD_METHOD(name) \
{ #name, (PyCFunction)ssl_Connection_##name, METH_VARARGS, ssl_Connection_##name##_doc }
#define ADD_ALIAS(name,real) \
{ #name, (PyCFunction)ssl_Connection_##real, METH_VARARGS, ssl_Connection_##real##_doc }
static PyMethodDef ssl_Connection_methods[] =
{
ADD_METHOD(get_context),
ADD_METHOD(set_context),
ADD_METHOD(get_servername),
ADD_METHOD(set_tlsext_host_name),
ADD_METHOD(pending),
ADD_METHOD(send),
ADD_ALIAS (write, send),
ADD_METHOD(sendall),
ADD_METHOD(recv),
ADD_ALIAS (read, recv),
ADD_METHOD(bio_read),
ADD_METHOD(bio_write),
ADD_METHOD(renegotiate),
ADD_METHOD(do_handshake),
#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x00907000L
ADD_METHOD(renegotiate_pending),
#endif
ADD_METHOD(total_renegotiations),
ADD_METHOD(connect),
ADD_METHOD(connect_ex),
ADD_METHOD(accept),
ADD_METHOD(bio_shutdown),
ADD_METHOD(shutdown),
ADD_METHOD(get_cipher_list),
ADD_METHOD(get_client_ca_list),
ADD_METHOD(makefile),
ADD_METHOD(get_app_data),
ADD_METHOD(set_app_data),
ADD_METHOD(get_shutdown),
ADD_METHOD(set_shutdown),
ADD_METHOD(state_string),
ADD_METHOD(server_random),
ADD_METHOD(client_random),
ADD_METHOD(master_key),
ADD_METHOD(sock_shutdown),
ADD_METHOD(get_peer_certificate),
ADD_METHOD(get_peer_cert_chain),
ADD_METHOD(want_read),
ADD_METHOD(want_write),
ADD_METHOD(set_accept_state),
ADD_METHOD(set_connect_state),
{ NULL, NULL }
};
#undef ADD_ALIAS
#undef ADD_METHOD
static char ssl_Connection_doc[] = "\n\
Connection(context, socket) -> Connection instance\n\
\n\
Create a new Connection object, using the given OpenSSL.SSL.Context instance\n\
and socket.\n\
\n\
@param context: An SSL Context to use for this connection\n\
@param socket: The socket to use for transport layer\n\
";
/*
* Initializer used by ssl_Connection_new and ssl_Connection_New. *Not*
* tp_init. This takes an already allocated ssl_ConnectionObj, a context, and
* a optionally a socket, and glues them all together.
*/
static ssl_ConnectionObj*
ssl_Connection_init(ssl_ConnectionObj *self, ssl_ContextObj *ctx, PyObject *sock) {
int fd;
Py_INCREF(ctx);
self->context = ctx;
Py_INCREF(sock);
self->socket = sock;
self->ssl = NULL;
self->from_ssl = NULL;
self->into_ssl = NULL;
Py_INCREF(Py_None);
self->app_data = Py_None;
self->tstate = NULL;
self->ssl = SSL_new(self->context->ctx);
SSL_set_app_data(self->ssl, self);
if (self->socket == Py_None)
{
/* If it's not a socket or file, treat it like a memory buffer,
* so crazy people can do things like EAP-TLS. */
self->into_ssl = BIO_new(BIO_s_mem());
self->from_ssl = BIO_new(BIO_s_mem());
if (self->into_ssl == NULL || self->from_ssl == NULL)
goto error;
SSL_set_bio(self->ssl, self->into_ssl, self->from_ssl);
}
else
{
fd = PyObject_AsFileDescriptor(self->socket);
if (fd < 0)
{
Py_DECREF(self);
return NULL;
}
else
{
SSL_set_fd(self->ssl, (SOCKET_T)fd);
}
}
return self;
error:
BIO_free(self->into_ssl); /* NULL safe */
BIO_free(self->from_ssl); /* NULL safe */
Py_DECREF(self);
return NULL;
}
/*
* Constructor for Connection objects
*
* Arguments: ctx - An SSL Context to use for this connection
* sock - The socket to use for transport layer
* Returns: The newly created Connection object
*/
ssl_ConnectionObj *
ssl_Connection_New(ssl_ContextObj *ctx, PyObject *sock) {
ssl_ConnectionObj *self;
self = PyObject_GC_New(ssl_ConnectionObj, &ssl_Connection_Type);
if (self == NULL) {
return NULL;
}
self = ssl_Connection_init(self, ctx, sock);
if (self == NULL) {
return NULL;
}
PyObject_GC_Track((PyObject *)self);
return self;
}
static PyObject*
ssl_Connection_new(PyTypeObject *subtype, PyObject *args, PyObject *kwargs) {
ssl_ConnectionObj *self;
ssl_ContextObj *ctx;
PyObject *sock;
static char *kwlist[] = {"context", "socket", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!O:Connection", kwlist,
&ssl_Context_Type, &ctx, &sock)) {
return NULL;
}
self = (ssl_ConnectionObj *)subtype->tp_alloc(subtype, 1);
if (self == NULL) {
return NULL;
}
return (PyObject *)ssl_Connection_init(self, ctx, sock);
}
/*
* Find attribute
*
* Arguments: self - The Connection object
* name - The attribute name
* Returns: A Python object for the attribute, or NULL if something went
* wrong
*/
static PyObject *
ssl_Connection_getattro(ssl_ConnectionObj *self, PyObject *nameobj) {
PyObject *meth;
meth = PyObject_GenericGetAttr((PyObject*)self, nameobj);
if (PyErr_Occurred() && PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
/* Try looking it up in the "socket" instead. */
meth = PyObject_GenericGetAttr(self->socket, nameobj);
}
return meth;
}
/*
* Call the visitproc on all contained objects.
*
* Arguments: self - The Connection object
* visit - Function to call
* arg - Extra argument to visit
* Returns: 0 if all goes well, otherwise the return code from the first
* call that gave non-zero result.
*/
static int
ssl_Connection_traverse(ssl_ConnectionObj *self, visitproc visit, void *arg)
{
int ret = 0;
if (ret == 0 && self->context != NULL)
ret = visit((PyObject *)self->context, arg);
if (ret == 0 && self->socket != NULL)
ret = visit(self->socket, arg);
if (ret == 0 && self->app_data != NULL)
ret = visit(self->app_data, arg);
return ret;
}
/*
* Decref all contained objects and zero the pointers.
*
* Arguments: self - The Connection object
* Returns: Always 0.
*/
static int
ssl_Connection_clear(ssl_ConnectionObj *self)
{
Py_XDECREF(self->context);
self->context = NULL;
Py_XDECREF(self->socket);
self->socket = NULL;
Py_XDECREF(self->app_data);
self->app_data = NULL;
self->into_ssl = NULL; /* was cleaned up by SSL_free() */
self->from_ssl = NULL; /* was cleaned up by SSL_free() */
return 0;
}
/*
* Deallocate the memory used by the Connection object
*
* Arguments: self - The Connection object
* Returns: None
*/
static void
ssl_Connection_dealloc(ssl_ConnectionObj *self)
{
PyObject_GC_UnTrack(self);
if (self->ssl != NULL)
SSL_free(self->ssl);
ssl_Connection_clear(self);
PyObject_GC_Del(self);
}
PyTypeObject ssl_Connection_Type = {
PyOpenSSL_HEAD_INIT(&PyType_Type, 0)
"OpenSSL.SSL.Connection",
sizeof(ssl_ConnectionObj),
0,
(destructor)ssl_Connection_dealloc,
NULL, /* print */
NULL, /* tp_getattr */
NULL, /* setattr */
NULL, /* compare */
NULL, /* repr */
NULL, /* as_number */
NULL, /* as_sequence */
NULL, /* as_mapping */
NULL, /* hash */
NULL, /* call */
NULL, /* str */
(getattrofunc)ssl_Connection_getattro, /* getattro */
NULL, /* setattro */
NULL, /* as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
ssl_Connection_doc, /* doc */
(traverseproc)ssl_Connection_traverse,
(inquiry)ssl_Connection_clear,
NULL, /* tp_richcompare */
0, /* tp_weaklistoffset */
NULL, /* tp_iter */
NULL, /* tp_iternext */
ssl_Connection_methods, /* tp_methods */
NULL, /* tp_members */
NULL, /* tp_getset */
NULL, /* tp_base */
NULL, /* tp_dict */
NULL, /* tp_descr_get */
NULL, /* tp_descr_set */
0, /* tp_dictoffset */
NULL, /* tp_init */
NULL, /* tp_alloc */
ssl_Connection_new, /* tp_new */
};
/*
* Initiailze the Connection part of the SSL sub module
*
* Arguments: dict - The OpenSSL.SSL module
* Returns: 1 for success, 0 otherwise
*/
int
init_ssl_connection(PyObject *module) {
if (PyType_Ready(&ssl_Connection_Type) < 0) {
return 0;
}
/* PyModule_AddObject steals a reference.
*/
Py_INCREF((PyObject *)&ssl_Connection_Type);
if (PyModule_AddObject(module, "Connection", (PyObject *)&ssl_Connection_Type) != 0) {
return 0;
}
/* PyModule_AddObject steals a reference.
*/
Py_INCREF((PyObject *)&ssl_Connection_Type);
if (PyModule_AddObject(module, "ConnectionType", (PyObject *)&ssl_Connection_Type) != 0) {
return 0;
}
return 1;
}
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