1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/*
* Basic SSL handshake functions.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nssrenam.h"
#include "cert.h"
#include "secitem.h"
#include "sechash.h"
#include "cryptohi.h" /* for SGN_ funcs */
#include "keyhi.h" /* for SECKEY_ high level functions. */
#include "ssl.h"
#include "sslimpl.h"
#include "sslproto.h"
#include "ssl3prot.h"
#include "sslerr.h"
#include "pk11func.h"
#include "prinit.h"
#include "prtime.h" /* for PR_Now() */
/*
** Put a string tag in the library so that we can examine an executable
** and see what kind of security it supports.
*/
const char *ssl_version = "SECURITY_VERSION:"
" +us"
" +export"
#ifdef TRACE
" +trace"
#endif
#ifdef DEBUG
" +debug"
#endif
;
/***********************************************************************
* Gathers in and handles records/messages until either the handshake is
* complete or application data is available.
*
* Called from ssl_Do1stHandshake() via function pointer ss->handshake.
* Caller must hold handshake lock.
* This function acquires and releases the RecvBufLock.
*
* returns SECSuccess for success.
* returns SECWouldBlock when that value is returned by
* ssl3_GatherCompleteHandshake().
* returns SECFailure on all other errors.
*
* The gather functions called by ssl_GatherRecord1stHandshake are expected
* to return values interpreted as follows:
* 1 : the function completed without error.
* 0 : the function read EOF.
* -1 : read error, or PR_WOULD_BLOCK_ERROR, or handleRecord error.
* -2 : the function wants ssl_GatherRecord1stHandshake to be called again
* immediately, by ssl_Do1stHandshake.
*
* This code is similar to, and easily confused with, DoRecv() in sslsecur.c
*
* This function is called from ssl_Do1stHandshake().
* The following functions put ssl_GatherRecord1stHandshake into ss->handshake:
* ssl_BeginClientHandshake
* ssl3_RestartHandshakeAfterCertReq
* ssl3_RestartHandshakeAfterServerCert
* ssl_BeginServerHandshake
*/
SECStatus
ssl_GatherRecord1stHandshake(sslSocket *ss)
{
int rv;
PORT_Assert(ss->opt.noLocks || ssl_Have1stHandshakeLock(ss));
ssl_GetRecvBufLock(ss);
/* Wait for handshake to complete, or application data to arrive. */
rv = ssl3_GatherCompleteHandshake(ss, 0);
SSL_TRC(10, ("%d: SSL[%d]: handshake gathering, rv=%d",
SSL_GETPID(), ss->fd, rv));
ssl_ReleaseRecvBufLock(ss);
if (rv <= 0) {
if (rv == SECWouldBlock) {
/* Progress is blocked waiting for callback completion. */
SSL_TRC(10, ("%d: SSL[%d]: handshake blocked (need %d)",
SSL_GETPID(), ss->fd, ss->gs.remainder));
return SECWouldBlock;
}
if (rv == 0) {
/* EOF. Loser */
PORT_SetError(PR_END_OF_FILE_ERROR);
}
return SECFailure; /* rv is < 0 here. */
}
ss->handshake = NULL;
return SECSuccess;
}
/* This function is called at the beginning of a handshake to ensure that at
* least one SSL/TLS version is enabled. */
static SECStatus
ssl_CheckConfigSanity(sslSocket *ss)
{
if (SSL_ALL_VERSIONS_DISABLED(&ss->vrange)) {
SSL_DBG(("%d: SSL[%d]: Can't handshake! all versions disabled.",
SSL_GETPID(), ss->fd));
PORT_SetError(SSL_ERROR_SSL_DISABLED);
return SECFailure;
}
return SECSuccess;
}
/* Sends out the initial client Hello message on the connection.
* Acquires and releases the socket's xmitBufLock.
*/
SECStatus
ssl_BeginClientHandshake(sslSocket *ss)
{
sslSessionID *sid;
SECStatus rv;
PORT_Assert(ss->opt.noLocks || ssl_Have1stHandshakeLock(ss));
ss->sec.isServer = PR_FALSE;
ssl_ChooseSessionIDProcs(&ss->sec);
rv = ssl_CheckConfigSanity(ss);
if (rv != SECSuccess)
goto loser;
/* Get peer name of server */
rv = ssl_GetPeerInfo(ss);
if (rv < 0) {
#ifdef HPUX11
/*
* On some HP-UX B.11.00 systems, getpeername() occasionally
* fails with ENOTCONN after a successful completion of
* non-blocking connect. I found that if we do a write()
* and then retry getpeername(), it will work.
*/
if (PR_GetError() == PR_NOT_CONNECTED_ERROR) {
char dummy;
(void)PR_Write(ss->fd->lower, &dummy, 0);
rv = ssl_GetPeerInfo(ss);
if (rv < 0) {
goto loser;
}
}
#else
goto loser;
#endif
}
SSL_TRC(3, ("%d: SSL[%d]: sending client-hello", SSL_GETPID(), ss->fd));
/* Try to find server in our session-id cache */
if (ss->opt.noCache) {
sid = NULL;
} else {
sid = ssl_LookupSID(&ss->sec.ci.peer, ss->sec.ci.port, ss->peerID,
ss->url);
}
if (sid) {
if (sid->version >= ss->vrange.min && sid->version <= ss->vrange.max) {
PORT_Assert(!ss->sec.localCert);
ss->sec.localCert = CERT_DupCertificate(sid->localCert);
} else {
ss->sec.uncache(sid);
ssl_FreeSID(sid);
sid = NULL;
}
}
if (!sid) {
sid = PORT_ZNew(sslSessionID);
if (!sid) {
goto loser;
}
sid->references = 1;
sid->cached = never_cached;
sid->addr = ss->sec.ci.peer;
sid->port = ss->sec.ci.port;
if (ss->peerID != NULL) {
sid->peerID = PORT_Strdup(ss->peerID);
}
if (ss->url != NULL) {
sid->urlSvrName = PORT_Strdup(ss->url);
}
}
ss->sec.ci.sid = sid;
PORT_Assert(sid != NULL);
ss->gs.state = GS_INIT;
ss->handshake = ssl_GatherRecord1stHandshake;
/* ssl3_SendClientHello will override this if it succeeds. */
ss->version = SSL_LIBRARY_VERSION_3_0;
ssl_GetSSL3HandshakeLock(ss);
ssl_GetXmitBufLock(ss);
rv = ssl3_SendClientHello(ss, client_hello_initial);
ssl_ReleaseXmitBufLock(ss);
ssl_ReleaseSSL3HandshakeLock(ss);
return rv;
loser:
return SECFailure;
}
SECStatus
ssl_BeginServerHandshake(sslSocket *ss)
{
SECStatus rv;
ss->sec.isServer = PR_TRUE;
ss->ssl3.hs.ws = wait_client_hello;
ssl_ChooseSessionIDProcs(&ss->sec);
rv = ssl_CheckConfigSanity(ss);
if (rv != SECSuccess)
goto loser;
ss->handshake = ssl_GatherRecord1stHandshake;
return SECSuccess;
loser:
return SECFailure;
}
/* This function doesn't really belong in this file.
** It's here to keep AIX compilers from optimizing it away,
** and not including it in the DSO.
*/
#include "nss.h"
extern const char __nss_ssl_version[];
PRBool
NSSSSL_VersionCheck(const char *importedVersion)
{
#define NSS_VERSION_VARIABLE __nss_ssl_version
#include "verref.h"
/*
* This is the secret handshake algorithm.
*
* This release has a simple version compatibility
* check algorithm. This release is not backward
* compatible with previous major releases. It is
* not compatible with future major, minor, or
* patch releases.
*/
return NSS_VersionCheck(importedVersion);
}
const char *
NSSSSL_GetVersion(void)
{
return NSS_VERSION;
}
|
