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Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input

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string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain() raises
a ValueError if the password is longer than 2 gigabytes. The ssl module does
not support partial write.
This commit is contained in:
Victor Stinner 2013-06-25 00:42:31 +02:00
parent 51cee7d24a
commit 6efa965a27
2 changed files with 11 additions and 5 deletions
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7
Misc/NEWS
View file

@ -38,9 +38,10 @@ Core and Builtins
Library Library
------- -------
- Issue #18135: Fix a possible integer overflow in ssl.SSLSocket.write() - Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input
and in ssl.SSLContext.load_cert_chain() for strings and passwords longer than string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain()
2 gigabytes. raises a ValueError if the password is longer than 2 gigabytes. The ssl
module does not support partial write.
- Issue #18248: Fix libffi build on AIX. - Issue #18248: Fix libffi build on AIX.

9
Modules/_ssl.c
View file

@ -1264,6 +1264,12 @@ static PyObject *PySSL_SSLwrite(PySSLSocket *self, PyObject *args)
return NULL; return NULL;
} }
if (buf.len > INT_MAX) {
PyErr_Format(PyExc_OverflowError,
"string longer than %d bytes", INT_MAX);
goto error;
}
/* just in case the blocking state of the socket has been changed */ /* just in case the blocking state of the socket has been changed */
nonblocking = (sock->sock_timeout >= 0.0); nonblocking = (sock->sock_timeout >= 0.0);
BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking); BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
@ -1284,9 +1290,8 @@ static PyObject *PySSL_SSLwrite(PySSLSocket *self, PyObject *args)
goto error; goto error;
} }
do { do {
len = (int)Py_MIN(buf.len, INT_MAX);
PySSL_BEGIN_ALLOW_THREADS PySSL_BEGIN_ALLOW_THREADS
len = SSL_write(self->ssl, buf.buf, len); len = SSL_write(self->ssl, buf.buf, (int)buf.len);
err = SSL_get_error(self->ssl, len); err = SSL_get_error(self->ssl, len);
PySSL_END_ALLOW_THREADS PySSL_END_ALLOW_THREADS
if (PyErr_CheckSignals()) { if (PyErr_CheckSignals()) {