commit 413574ad388d1f5bb756e818beb5ea9837b03bc3 Author: Nick Mathewson nickm@torproject.org Date: Fri Aug 5 19:07:33 2011 -0400

Clear socks auth fields before free --- src/or/buffers.c | 10 ++++++++-- src/or/circuitlist.c | 10 ++++++++-- src/or/connection_edge.c | 10 ++++++++-- 3 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/src/or/buffers.c b/src/or/buffers.c index 5b9e55e..488289c 100644 --- a/src/or/buffers.c +++ b/src/or/buffers.c @@ -1532,8 +1532,14 @@ socks_request_free(socks_request_t *req) { if (!req) return; - tor_free(req->username); - tor_free(req->password); + if (req->username) { + memset(req->username, 0x10, req->usernamelen); + tor_free(req->username); + } + if (req->password) { + memset(req->password, 0x04, req->passwordlen); + tor_free(req->password); + } memset(req, 0xCC, sizeof(socks_request_t)); tor_free(req); } diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c index 48c5afc..2222a25 100644 --- a/src/or/circuitlist.c +++ b/src/or/circuitlist.c @@ -552,8 +552,14 @@ circuit_free(circuit_t *circ) rend_data_free(ocirc->rend_data);

tor_free(ocirc->dest_address); - tor_free(ocirc->socks_username); - tor_free(ocirc->socks_password); + if (ocirc->socks_username) { + memset(ocirc->socks_username, 0x12, ocirc->socks_username_len); + tor_free(ocirc->socks_username); + } + if (ocirc->socks_password) { + memset(ocirc->socks_password, 0x06, ocirc->socks_password_len); + tor_free(ocirc->socks_password); + } } else { or_circuit_t *ocirc = TO_OR_CIRCUIT(circ); /* Remember cell statistics for this circuit before deallocating. */ diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index 83102ba..ae2dfd2 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -3569,8 +3569,14 @@ circuit_clear_isolation(origin_circuit_t *circ) tor_free(circ->dest_address); circ->session_group = -1; circ->nym_epoch = 0; - tor_free(circ->socks_username); - tor_free(circ->socks_password); + if (circ->socks_username) { + memset(circ->socks_username, 0x11, circ->socks_username_len); + tor_free(circ->socks_username); + } + if (circ->socks_password) { + memset(circ->socks_password, 0x05, circ->socks_password_len); + tor_free(circ->socks_password); + } circ->socks_username_len = circ->socks_password_len = 0; }