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gecko/security/nss/lib/ssl/sslsecur.c
Wan-Teh Chang e472041d5e Update NSS to NSS_3_12_8_BETA1. approval2.0+ by dtownsend in 
bug 437904 and by sayrer in bug 525092.  Also includes fixes
for bug 526231, bug 575174, and bug 580679.

--HG--
extra : rebase_source : 74988b3cb91db5dccc5f904c12cbee4acfa46162
2010-08-02 13:49:18 -07:00

1535 lines
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/*
* Various SSL functions.
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1994-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dr Vipul Gupta <vipul.gupta@sun.com>, Sun Microsystems Laboratories
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* $Id: sslsecur.c,v 1.43.2.1 2010/07/31 04:33:52 wtc%google.com Exp $ */
#include "cert.h"
#include "secitem.h"
#include "keyhi.h"
#include "ssl.h"
#include "sslimpl.h"
#include "sslproto.h"
#include "secoid.h" /* for SECOID_GetALgorithmTag */
#include "pk11func.h" /* for PK11_GenerateRandom */
#include "nss.h" /* for NSS_RegisterShutdown */
#include "prinit.h" /* for PR_CallOnceWithArg */
#define MAX_BLOCK_CYPHER_SIZE 32
#define TEST_FOR_FAILURE /* reminder */
#define SET_ERROR_CODE /* reminder */
/* Returns a SECStatus: SECSuccess or SECFailure, NOT SECWouldBlock.
*
* Currently, the list of functions called through ss->handshake is:
*
* In sslsocks.c:
* SocksGatherRecord
* SocksHandleReply
* SocksStartGather
*
* In sslcon.c:
* ssl_GatherRecord1stHandshake
* ssl2_HandleClientSessionKeyMessage
* ssl2_HandleMessage
* ssl2_HandleVerifyMessage
* ssl2_BeginClientHandshake
* ssl2_BeginServerHandshake
* ssl2_HandleClientHelloMessage
* ssl2_HandleServerHelloMessage
*
* The ss->handshake function returns SECWouldBlock under these conditions:
* 1. ssl_GatherRecord1stHandshake called ssl2_GatherData which read in
* the beginning of an SSL v3 hello message and returned SECWouldBlock
* to switch to SSL v3 handshake processing.
*
* 2. ssl2_HandleClientHelloMessage discovered version 3.0 in the incoming
* v2 client hello msg, and called ssl3_HandleV2ClientHello which
* returned SECWouldBlock.
*
* 3. SECWouldBlock was returned by one of the callback functions, via
* one of these paths:
* - ssl2_HandleMessage() -> ssl2_HandleRequestCertificate() -> ss->getClientAuthData()
*
* - ssl2_HandleServerHelloMessage() -> ss->handleBadCert()
*
* - ssl_GatherRecord1stHandshake() -> ssl3_GatherCompleteHandshake() ->
* ssl3_HandleRecord() -> ssl3_HandleHandshake() ->
* ssl3_HandleHandshakeMessage() -> ssl3_HandleCertificate() ->
* ss->handleBadCert()
*
* - ssl_GatherRecord1stHandshake() -> ssl3_GatherCompleteHandshake() ->
* ssl3_HandleRecord() -> ssl3_HandleHandshake() ->
* ssl3_HandleHandshakeMessage() -> ssl3_HandleCertificateRequest() ->
* ss->getClientAuthData()
*
* Called from: SSL_ForceHandshake (below),
* ssl_SecureRecv (below) and
* ssl_SecureSend (below)
* from: WaitForResponse in sslsocks.c
* ssl_SocksRecv in sslsocks.c
* ssl_SocksSend in sslsocks.c
*
* Caller must hold the (write) handshakeLock.
*/
int
ssl_Do1stHandshake(sslSocket *ss)
{
int rv = SECSuccess;
int loopCount = 0;
do {
PORT_Assert(ss->opt.noLocks || ssl_Have1stHandshakeLock(ss) );
PORT_Assert(ss->opt.noLocks || !ssl_HaveRecvBufLock(ss));
PORT_Assert(ss->opt.noLocks || !ssl_HaveXmitBufLock(ss));
if (ss->handshake == 0) {
/* Previous handshake finished. Switch to next one */
ss->handshake = ss->nextHandshake;
ss->nextHandshake = 0;
}
if (ss->handshake == 0) {
/* Previous handshake finished. Switch to security handshake */
ss->handshake = ss->securityHandshake;
ss->securityHandshake = 0;
}
if (ss->handshake == 0) {
ssl_GetRecvBufLock(ss);
ss->gs.recordLen = 0;
ssl_ReleaseRecvBufLock(ss);
SSL_TRC(3, ("%d: SSL[%d]: handshake is completed",
SSL_GETPID(), ss->fd));
/* call handshake callback for ssl v2 */
/* for v3 this is done in ssl3_HandleFinished() */
if ((ss->handshakeCallback != NULL) && /* has callback */
(!ss->firstHsDone) && /* only first time */
(ss->version < SSL_LIBRARY_VERSION_3_0)) { /* not ssl3 */
ss->firstHsDone = PR_TRUE;
(ss->handshakeCallback)(ss->fd, ss->handshakeCallbackData);
}
ss->firstHsDone = PR_TRUE;
ss->gs.writeOffset = 0;
ss->gs.readOffset = 0;
break;
}
rv = (*ss->handshake)(ss);
++loopCount;
/* This code must continue to loop on SECWouldBlock,
* or any positive value. See XXX_1 comments.
*/
} while (rv != SECFailure); /* was (rv >= 0); XXX_1 */
PORT_Assert(ss->opt.noLocks || !ssl_HaveRecvBufLock(ss));
PORT_Assert(ss->opt.noLocks || !ssl_HaveXmitBufLock(ss));
if (rv == SECWouldBlock) {
PORT_SetError(PR_WOULD_BLOCK_ERROR);
rv = SECFailure;
}
return rv;
}
/*
* Handshake function that blocks. Used to force a
* retry on a connection on the next read/write.
*/
static SECStatus
AlwaysBlock(sslSocket *ss)
{
PORT_SetError(PR_WOULD_BLOCK_ERROR); /* perhaps redundant. */
return SECWouldBlock;
}
/*
* set the initial handshake state machine to block
*/
void
ssl_SetAlwaysBlock(sslSocket *ss)
{
if (!ss->firstHsDone) {
ss->handshake = AlwaysBlock;
ss->nextHandshake = 0;
}
}
static SECStatus
ssl_SetTimeout(PRFileDesc *fd, PRIntervalTime timeout)
{
sslSocket *ss;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in SetTimeout", SSL_GETPID(), fd));
return SECFailure;
}
SSL_LOCK_READER(ss);
ss->rTimeout = timeout;
if (ss->opt.fdx) {
SSL_LOCK_WRITER(ss);
}
ss->wTimeout = timeout;
if (ss->opt.fdx) {
SSL_UNLOCK_WRITER(ss);
}
SSL_UNLOCK_READER(ss);
return SECSuccess;
}
/* Acquires and releases HandshakeLock.
*/
SECStatus
SSL_ResetHandshake(PRFileDesc *s, PRBool asServer)
{
sslSocket *ss;
SECStatus status;
PRNetAddr addr;
ss = ssl_FindSocket(s);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in ResetHandshake", SSL_GETPID(), s));
return SECFailure;
}
/* Don't waste my time */
if (!ss->opt.useSecurity)
return SECSuccess;
SSL_LOCK_READER(ss);
SSL_LOCK_WRITER(ss);
/* Reset handshake state */
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
ss->firstHsDone = PR_FALSE;
if ( asServer ) {
ss->handshake = ssl2_BeginServerHandshake;
ss->handshaking = sslHandshakingAsServer;
} else {
ss->handshake = ssl2_BeginClientHandshake;
ss->handshaking = sslHandshakingAsClient;
}
ss->nextHandshake = 0;
ss->securityHandshake = 0;
ssl_GetRecvBufLock(ss);
status = ssl_InitGather(&ss->gs);
ssl_ReleaseRecvBufLock(ss);
/*
** Blow away old security state and get a fresh setup.
*/
ssl_GetXmitBufLock(ss);
ssl_ResetSecurityInfo(&ss->sec, PR_TRUE);
status = ssl_CreateSecurityInfo(ss);
ssl_ReleaseXmitBufLock(ss);
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
if (!ss->TCPconnected)
ss->TCPconnected = (PR_SUCCESS == ssl_DefGetpeername(ss, &addr));
SSL_UNLOCK_WRITER(ss);
SSL_UNLOCK_READER(ss);
return status;
}
/* For SSLv2, does nothing but return an error.
** For SSLv3, flushes SID cache entry (if requested),
** and then starts new client hello or hello request.
** Acquires and releases HandshakeLock.
*/
SECStatus
SSL_ReHandshake(PRFileDesc *fd, PRBool flushCache)
{
sslSocket *ss;
SECStatus rv;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in RedoHandshake", SSL_GETPID(), fd));
return SECFailure;
}
if (!ss->opt.useSecurity)
return SECSuccess;
ssl_Get1stHandshakeLock(ss);
/* SSL v2 protocol does not support subsequent handshakes. */
if (ss->version < SSL_LIBRARY_VERSION_3_0) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
rv = SECFailure;
} else {
ssl_GetSSL3HandshakeLock(ss);
rv = ssl3_RedoHandshake(ss, flushCache); /* force full handshake. */
ssl_ReleaseSSL3HandshakeLock(ss);
}
ssl_Release1stHandshakeLock(ss);
return rv;
}
/*
** Same as above, but with an I/O timeout.
*/
SSL_IMPORT SECStatus SSL_ReHandshakeWithTimeout(PRFileDesc *fd,
PRBool flushCache,
PRIntervalTime timeout)
{
if (SECSuccess != ssl_SetTimeout(fd, timeout)) {
return SECFailure;
}
return SSL_ReHandshake(fd, flushCache);
}
SECStatus
SSL_RedoHandshake(PRFileDesc *fd)
{
return SSL_ReHandshake(fd, PR_TRUE);
}
/* Register an application callback to be called when SSL handshake completes.
** Acquires and releases HandshakeLock.
*/
SECStatus
SSL_HandshakeCallback(PRFileDesc *fd, SSLHandshakeCallback cb,
void *client_data)
{
sslSocket *ss;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in HandshakeCallback",
SSL_GETPID(), fd));
return SECFailure;
}
if (!ss->opt.useSecurity) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
ss->handshakeCallback = cb;
ss->handshakeCallbackData = client_data;
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
return SECSuccess;
}
/* Try to make progress on an SSL handshake by attempting to read the
** next handshake from the peer, and sending any responses.
** For non-blocking sockets, returns PR_ERROR_WOULD_BLOCK if it cannot
** read the next handshake from the underlying socket.
** For SSLv2, returns when handshake is complete or fatal error occurs.
** For SSLv3, returns when handshake is complete, or application data has
** arrived that must be taken by application before handshake can continue,
** or a fatal error occurs.
** Application should use handshake completion callback to tell which.
*/
SECStatus
SSL_ForceHandshake(PRFileDesc *fd)
{
sslSocket *ss;
SECStatus rv = SECFailure;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in ForceHandshake",
SSL_GETPID(), fd));
return rv;
}
/* Don't waste my time */
if (!ss->opt.useSecurity)
return SECSuccess;
ssl_Get1stHandshakeLock(ss);
if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
int gatherResult;
ssl_GetRecvBufLock(ss);
gatherResult = ssl3_GatherCompleteHandshake(ss, 0);
ssl_ReleaseRecvBufLock(ss);
if (gatherResult > 0) {
rv = SECSuccess;
} else if (gatherResult == 0) {
PORT_SetError(PR_END_OF_FILE_ERROR);
} else if (gatherResult == SECWouldBlock) {
PORT_SetError(PR_WOULD_BLOCK_ERROR);
}
} else if (!ss->firstHsDone) {
rv = ssl_Do1stHandshake(ss);
} else {
/* tried to force handshake on an SSL 2 socket that has
** already completed the handshake. */
rv = SECSuccess; /* just pretend we did it. */
}
ssl_Release1stHandshakeLock(ss);
return rv;
}
/*
** Same as above, but with an I/O timeout.
*/
SSL_IMPORT SECStatus SSL_ForceHandshakeWithTimeout(PRFileDesc *fd,
PRIntervalTime timeout)
{
if (SECSuccess != ssl_SetTimeout(fd, timeout)) {
return SECFailure;
}
return SSL_ForceHandshake(fd);
}
/************************************************************************/
/*
** Grow a buffer to hold newLen bytes of data.
** Called for both recv buffers and xmit buffers.
** Caller must hold xmitBufLock or recvBufLock, as appropriate.
*/
SECStatus
sslBuffer_Grow(sslBuffer *b, unsigned int newLen)
{
newLen = PR_MAX(newLen, MAX_FRAGMENT_LENGTH + 2048);
if (newLen > b->space) {
unsigned char *newBuf;
if (b->buf) {
newBuf = (unsigned char *) PORT_Realloc(b->buf, newLen);
} else {
newBuf = (unsigned char *) PORT_Alloc(newLen);
}
if (!newBuf) {
return SECFailure;
}
SSL_TRC(10, ("%d: SSL: grow buffer from %d to %d",
SSL_GETPID(), b->space, newLen));
b->buf = newBuf;
b->space = newLen;
}
return SECSuccess;
}
SECStatus
sslBuffer_Append(sslBuffer *b, const void * data, unsigned int len)
{
unsigned int newLen = b->len + len;
SECStatus rv;
rv = sslBuffer_Grow(b, newLen);
if (rv != SECSuccess)
return rv;
PORT_Memcpy(b->buf + b->len, data, len);
b->len += len;
return SECSuccess;
}
/*
** Save away write data that is trying to be written before the security
** handshake has been completed. When the handshake is completed, we will
** flush this data out.
** Caller must hold xmitBufLock
*/
SECStatus
ssl_SaveWriteData(sslSocket *ss, const void *data, unsigned int len)
{
SECStatus rv;
PORT_Assert( ss->opt.noLocks || ssl_HaveXmitBufLock(ss) );
rv = sslBuffer_Append(&ss->pendingBuf, data, len);
SSL_TRC(5, ("%d: SSL[%d]: saving %u bytes of data (%u total saved so far)",
SSL_GETPID(), ss->fd, len, ss->pendingBuf.len));
return rv;
}
/*
** Send saved write data. This will flush out data sent prior to a
** complete security handshake. Hopefully there won't be too much of it.
** Returns count of the bytes sent, NOT a SECStatus.
** Caller must hold xmitBufLock
*/
int
ssl_SendSavedWriteData(sslSocket *ss)
{
int rv = 0;
PORT_Assert( ss->opt.noLocks || ssl_HaveXmitBufLock(ss) );
if (ss->pendingBuf.len != 0) {
SSL_TRC(5, ("%d: SSL[%d]: sending %d bytes of saved data",
SSL_GETPID(), ss->fd, ss->pendingBuf.len));
rv = ssl_DefSend(ss, ss->pendingBuf.buf, ss->pendingBuf.len, 0);
if (rv < 0) {
return rv;
}
ss->pendingBuf.len -= rv;
if (ss->pendingBuf.len > 0 && rv > 0) {
/* UGH !! This shifts the whole buffer down by copying it */
PORT_Memmove(ss->pendingBuf.buf, ss->pendingBuf.buf + rv,
ss->pendingBuf.len);
}
}
return rv;
}
/************************************************************************/
/*
** Receive some application data on a socket. Reads SSL records from the input
** stream, decrypts them and then copies them to the output buffer.
** Called from ssl_SecureRecv() below.
**
** Caller does NOT hold 1stHandshakeLock because that handshake is over.
** Caller doesn't call this until initial handshake is complete.
** For SSLv2, there is no subsequent handshake.
** For SSLv3, the call to ssl3_GatherAppDataRecord may encounter handshake
** messages from a subsequent handshake.
**
** This code is similar to, and easily confused with,
** ssl_GatherRecord1stHandshake() in sslcon.c
*/
static int
DoRecv(sslSocket *ss, unsigned char *out, int len, int flags)
{
int rv;
int amount;
int available;
ssl_GetRecvBufLock(ss);
available = ss->gs.writeOffset - ss->gs.readOffset;
if (available == 0) {
/* Get some more data */
if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
/* Wait for application data to arrive. */
rv = ssl3_GatherAppDataRecord(ss, 0);
} else {
/* See if we have a complete record */
rv = ssl2_GatherRecord(ss, 0);
}
if (rv <= 0) {
if (rv == 0) {
/* EOF */
SSL_TRC(10, ("%d: SSL[%d]: ssl_recv EOF",
SSL_GETPID(), ss->fd));
goto done;
}
if ((rv != SECWouldBlock) &&
(PR_GetError() != PR_WOULD_BLOCK_ERROR)) {
/* Some random error */
goto done;
}
/*
** Gather record is blocked waiting for more record data to
** arrive. Try to process what we have already received
*/
} else {
/* Gather record has finished getting a complete record */
}
/* See if any clear data is now available */
available = ss->gs.writeOffset - ss->gs.readOffset;
if (available == 0) {
/*
** No partial data is available. Force error code to
** EWOULDBLOCK so that caller will try again later. Note
** that the error code is probably EWOULDBLOCK already,
** but if it isn't (for example, if we received a zero
** length record) then this will force it to be correct.
*/
PORT_SetError(PR_WOULD_BLOCK_ERROR);
rv = SECFailure;
goto done;
}
SSL_TRC(30, ("%d: SSL[%d]: partial data ready, available=%d",
SSL_GETPID(), ss->fd, available));
}
/* Dole out clear data to reader */
amount = PR_MIN(len, available);
PORT_Memcpy(out, ss->gs.buf.buf + ss->gs.readOffset, amount);
if (!(flags & PR_MSG_PEEK)) {
ss->gs.readOffset += amount;
}
rv = amount;
SSL_TRC(30, ("%d: SSL[%d]: amount=%d available=%d",
SSL_GETPID(), ss->fd, amount, available));
PRINT_BUF(4, (ss, "DoRecv receiving plaintext:", out, amount));
done:
ssl_ReleaseRecvBufLock(ss);
return rv;
}
/************************************************************************/
SSLKEAType
ssl_FindCertKEAType(CERTCertificate * cert)
{
SSLKEAType keaType = kt_null;
int tag;
if (!cert) goto loser;
tag = SECOID_GetAlgorithmTag(&(cert->subjectPublicKeyInfo.algorithm));
switch (tag) {
case SEC_OID_X500_RSA_ENCRYPTION:
case SEC_OID_PKCS1_RSA_ENCRYPTION:
keaType = kt_rsa;
break;
case SEC_OID_X942_DIFFIE_HELMAN_KEY:
keaType = kt_dh;
break;
#ifdef NSS_ENABLE_ECC
case SEC_OID_ANSIX962_EC_PUBLIC_KEY:
keaType = kt_ecdh;
break;
#endif /* NSS_ENABLE_ECC */
default:
keaType = kt_null;
}
loser:
return keaType;
}
static const PRCallOnceType pristineCallOnce;
static PRCallOnceType setupServerCAListOnce;
static SECStatus serverCAListShutdown(void* appData, void* nssData)
{
PORT_Assert(ssl3_server_ca_list);
if (ssl3_server_ca_list) {
CERT_FreeDistNames(ssl3_server_ca_list);
ssl3_server_ca_list = NULL;
}
setupServerCAListOnce = pristineCallOnce;
return SECSuccess;
}
static PRStatus serverCAListSetup(void *arg)
{
CERTCertDBHandle *dbHandle = (CERTCertDBHandle *)arg;
SECStatus rv = NSS_RegisterShutdown(serverCAListShutdown, NULL);
PORT_Assert(SECSuccess == rv);
if (SECSuccess == rv) {
ssl3_server_ca_list = CERT_GetSSLCACerts(dbHandle);
return PR_SUCCESS;
}
return PR_FAILURE;
}
SECStatus
ssl_ConfigSecureServer(sslSocket *ss, CERTCertificate *cert,
CERTCertificateList *certChain,
ssl3KeyPair *keyPair, SSLKEAType kea)
{
CERTCertificateList *localCertChain = NULL;
sslServerCerts *sc = ss->serverCerts + kea;
/* load the server certificate */
if (sc->serverCert != NULL) {
CERT_DestroyCertificate(sc->serverCert);
sc->serverCert = NULL;
sc->serverKeyBits = 0;
}
/* load the server cert chain */
if (sc->serverCertChain != NULL) {
CERT_DestroyCertificateList(sc->serverCertChain);
sc->serverCertChain = NULL;
}
if (cert) {
sc->serverCert = CERT_DupCertificate(cert);
/* get the size of the cert's public key, and remember it */
sc->serverKeyBits = SECKEY_PublicKeyStrengthInBits(keyPair->pubKey);
if (!certChain) {
localCertChain =
CERT_CertChainFromCert(sc->serverCert, certUsageSSLServer,
PR_TRUE);
if (!localCertChain)
goto loser;
}
sc->serverCertChain = (certChain) ? CERT_DupCertList(certChain) :
localCertChain;
if (!sc->serverCertChain) {
goto loser;
}
localCertChain = NULL; /* consumed */
}
/* get keyPair */
if (sc->serverKeyPair != NULL) {
ssl3_FreeKeyPair(sc->serverKeyPair);
sc->serverKeyPair = NULL;
}
if (keyPair) {
SECKEY_CacheStaticFlags(keyPair->privKey);
sc->serverKeyPair = ssl3_GetKeyPairRef(keyPair);
}
if (kea == kt_rsa && cert && sc->serverKeyBits > 512 &&
!ss->opt.noStepDown && !ss->stepDownKeyPair) {
if (ssl3_CreateRSAStepDownKeys(ss) != SECSuccess) {
goto loser;
}
}
return SECSuccess;
loser:
if (localCertChain) {
CERT_DestroyCertificateList(localCertChain);
}
if (sc->serverCert != NULL) {
CERT_DestroyCertificate(sc->serverCert);
sc->serverCert = NULL;
}
if (sc->serverCertChain != NULL) {
CERT_DestroyCertificateList(sc->serverCertChain);
sc->serverCertChain = NULL;
}
if (sc->serverKeyPair != NULL) {
ssl3_FreeKeyPair(sc->serverKeyPair);
sc->serverKeyPair = NULL;
}
return SECFailure;
}
/* XXX need to protect the data that gets changed here.!! */
SECStatus
SSL_ConfigSecureServer(PRFileDesc *fd, CERTCertificate *cert,
SECKEYPrivateKey *key, SSL3KEAType kea)
{
sslSocket *ss;
SECKEYPublicKey *pubKey = NULL;
ssl3KeyPair *keyPair = NULL;
SECStatus rv = SECFailure;
ss = ssl_FindSocket(fd);
if (!ss) {
return SECFailure;
}
/* Both key and cert must have a value or be NULL */
/* Passing a value of NULL will turn off key exchange algorithms that were
* previously turned on */
if (!cert != !key) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
/* make sure the key exchange is recognized */
if ((kea >= kt_kea_size) || (kea < kt_null)) {
PORT_SetError(SEC_ERROR_UNSUPPORTED_KEYALG);
return SECFailure;
}
if (kea != ssl_FindCertKEAType(cert)) {
PORT_SetError(SSL_ERROR_CERT_KEA_MISMATCH);
return SECFailure;
}
if (cert) {
/* get the size of the cert's public key, and remember it */
pubKey = CERT_ExtractPublicKey(cert);
if (!pubKey)
return SECFailure;
}
if (key) {
SECKEYPrivateKey * keyCopy = NULL;
CK_MECHANISM_TYPE keyMech = CKM_INVALID_MECHANISM;
if (key->pkcs11Slot) {
PK11SlotInfo * bestSlot;
bestSlot = PK11_ReferenceSlot(key->pkcs11Slot);
if (bestSlot) {
keyCopy = PK11_CopyTokenPrivKeyToSessionPrivKey(bestSlot, key);
PK11_FreeSlot(bestSlot);
}
}
if (keyCopy == NULL)
keyMech = PK11_MapSignKeyType(key->keyType);
if (keyMech != CKM_INVALID_MECHANISM) {
PK11SlotInfo * bestSlot;
/* XXX Maybe should be bestSlotMultiple? */
bestSlot = PK11_GetBestSlot(keyMech, NULL /* wincx */);
if (bestSlot) {
keyCopy = PK11_CopyTokenPrivKeyToSessionPrivKey(bestSlot, key);
PK11_FreeSlot(bestSlot);
}
}
if (keyCopy == NULL)
keyCopy = SECKEY_CopyPrivateKey(key);
if (keyCopy == NULL)
goto loser;
keyPair = ssl3_NewKeyPair(keyCopy, pubKey);
if (keyPair == NULL) {
SECKEY_DestroyPrivateKey(keyCopy);
goto loser;
}
pubKey = NULL; /* adopted by serverKeyPair */
}
if (ssl_ConfigSecureServer(ss, cert, NULL,
keyPair, kea) == SECFailure) {
goto loser;
}
/* Only do this once because it's global. */
if (PR_SUCCESS == PR_CallOnceWithArg(&setupServerCAListOnce,
&serverCAListSetup,
(void *)(ss->dbHandle))) {
rv = SECSuccess;
}
loser:
if (keyPair) {
ssl3_FreeKeyPair(keyPair);
}
if (pubKey) {
SECKEY_DestroyPublicKey(pubKey);
pubKey = NULL;
}
return rv;
}
/************************************************************************/
SECStatus
ssl_CreateSecurityInfo(sslSocket *ss)
{
SECStatus status;
/* initialize sslv2 socket to send data in the clear. */
ssl2_UseClearSendFunc(ss);
ss->sec.blockSize = 1;
ss->sec.blockShift = 0;
ssl_GetXmitBufLock(ss);
status = sslBuffer_Grow(&ss->sec.writeBuf, 4096);
ssl_ReleaseXmitBufLock(ss);
return status;
}
SECStatus
ssl_CopySecurityInfo(sslSocket *ss, sslSocket *os)
{
ss->sec.send = os->sec.send;
ss->sec.isServer = os->sec.isServer;
ss->sec.keyBits = os->sec.keyBits;
ss->sec.secretKeyBits = os->sec.secretKeyBits;
ss->sec.peerCert = CERT_DupCertificate(os->sec.peerCert);
if (os->sec.peerCert && !ss->sec.peerCert)
goto loser;
ss->sec.cache = os->sec.cache;
ss->sec.uncache = os->sec.uncache;
/* we don't dup the connection info. */
ss->sec.sendSequence = os->sec.sendSequence;
ss->sec.rcvSequence = os->sec.rcvSequence;
if (os->sec.hash && os->sec.hashcx) {
ss->sec.hash = os->sec.hash;
ss->sec.hashcx = os->sec.hash->clone(os->sec.hashcx);
if (os->sec.hashcx && !ss->sec.hashcx)
goto loser;
} else {
ss->sec.hash = NULL;
ss->sec.hashcx = NULL;
}
SECITEM_CopyItem(0, &ss->sec.sendSecret, &os->sec.sendSecret);
if (os->sec.sendSecret.data && !ss->sec.sendSecret.data)
goto loser;
SECITEM_CopyItem(0, &ss->sec.rcvSecret, &os->sec.rcvSecret);
if (os->sec.rcvSecret.data && !ss->sec.rcvSecret.data)
goto loser;
/* XXX following code is wrong if either cx != 0 */
PORT_Assert(os->sec.readcx == 0);
PORT_Assert(os->sec.writecx == 0);
ss->sec.readcx = os->sec.readcx;
ss->sec.writecx = os->sec.writecx;
ss->sec.destroy = 0;
ss->sec.enc = os->sec.enc;
ss->sec.dec = os->sec.dec;
ss->sec.blockShift = os->sec.blockShift;
ss->sec.blockSize = os->sec.blockSize;
return SECSuccess;
loser:
return SECFailure;
}
/* Reset sec back to its initial state.
** Caller holds any relevant locks.
*/
void
ssl_ResetSecurityInfo(sslSecurityInfo *sec, PRBool doMemset)
{
/* Destroy MAC */
if (sec->hash && sec->hashcx) {
(*sec->hash->destroy)(sec->hashcx, PR_TRUE);
sec->hashcx = NULL;
sec->hash = NULL;
}
SECITEM_ZfreeItem(&sec->sendSecret, PR_FALSE);
SECITEM_ZfreeItem(&sec->rcvSecret, PR_FALSE);
/* Destroy ciphers */
if (sec->destroy) {
(*sec->destroy)(sec->readcx, PR_TRUE);
(*sec->destroy)(sec->writecx, PR_TRUE);
sec->readcx = NULL;
sec->writecx = NULL;
} else {
PORT_Assert(sec->readcx == 0);
PORT_Assert(sec->writecx == 0);
}
sec->readcx = 0;
sec->writecx = 0;
if (sec->localCert) {
CERT_DestroyCertificate(sec->localCert);
sec->localCert = NULL;
}
if (sec->peerCert) {
CERT_DestroyCertificate(sec->peerCert);
sec->peerCert = NULL;
}
if (sec->peerKey) {
SECKEY_DestroyPublicKey(sec->peerKey);
sec->peerKey = NULL;
}
/* cleanup the ci */
if (sec->ci.sid != NULL) {
ssl_FreeSID(sec->ci.sid);
}
PORT_ZFree(sec->ci.sendBuf.buf, sec->ci.sendBuf.space);
if (doMemset) {
memset(&sec->ci, 0, sizeof sec->ci);
}
}
/*
** Called from SSL_ResetHandshake (above), and
** from ssl_FreeSocket in sslsock.c
** Caller should hold relevant locks (e.g. XmitBufLock)
*/
void
ssl_DestroySecurityInfo(sslSecurityInfo *sec)
{
ssl_ResetSecurityInfo(sec, PR_FALSE);
PORT_ZFree(sec->writeBuf.buf, sec->writeBuf.space);
sec->writeBuf.buf = 0;
memset(sec, 0, sizeof *sec);
}
/************************************************************************/
int
ssl_SecureConnect(sslSocket *ss, const PRNetAddr *sa)
{
PRFileDesc *osfd = ss->fd->lower;
int rv;
if ( ss->opt.handshakeAsServer ) {
ss->securityHandshake = ssl2_BeginServerHandshake;
ss->handshaking = sslHandshakingAsServer;
} else {
ss->securityHandshake = ssl2_BeginClientHandshake;
ss->handshaking = sslHandshakingAsClient;
}
/* connect to server */
rv = osfd->methods->connect(osfd, sa, ss->cTimeout);
if (rv == PR_SUCCESS) {
ss->TCPconnected = 1;
} else {
int err = PR_GetError();
SSL_DBG(("%d: SSL[%d]: connect failed, errno=%d",
SSL_GETPID(), ss->fd, err));
if (err == PR_IS_CONNECTED_ERROR) {
ss->TCPconnected = 1;
}
}
SSL_TRC(5, ("%d: SSL[%d]: secure connect completed, rv == %d",
SSL_GETPID(), ss->fd, rv));
return rv;
}
/*
* The TLS 1.2 RFC 5246, Section 7.2.1 says:
*
* Unless some other fatal alert has been transmitted, each party is
* required to send a close_notify alert before closing the write side
* of the connection. The other party MUST respond with a close_notify
* alert of its own and close down the connection immediately,
* discarding any pending writes. It is not required for the initiator
* of the close to wait for the responding close_notify alert before
* closing the read side of the connection.
*
* The second sentence requires that we send a close_notify alert when we
* have received a close_notify alert. In practice, all SSL implementations
* close the socket immediately after sending a close_notify alert (which is
* allowed by the third sentence), so responding with a close_notify alert
* would result in a write failure with the ECONNRESET error. This is why
* we don't respond with a close_notify alert.
*
* Also, in the unlikely event that the TCP pipe is full and the peer stops
* reading, the SSL3_SendAlert call in ssl_SecureClose and ssl_SecureShutdown
* may block indefinitely in blocking mode, and may fail (without retrying)
* in non-blocking mode.
*/
int
ssl_SecureClose(sslSocket *ss)
{
int rv;
if (ss->version >= SSL_LIBRARY_VERSION_3_0 &&
!(ss->shutdownHow & ssl_SHUTDOWN_SEND) &&
ss->firstHsDone &&
!ss->recvdCloseNotify &&
ss->ssl3.initialized) {
/* We don't want the final alert to be Nagle delayed. */
if (!ss->delayDisabled) {
ssl_EnableNagleDelay(ss, PR_FALSE);
ss->delayDisabled = 1;
}
(void) SSL3_SendAlert(ss, alert_warning, close_notify);
}
rv = ssl_DefClose(ss);
return rv;
}
/* Caller handles all locking */
int
ssl_SecureShutdown(sslSocket *ss, int nsprHow)
{
PRFileDesc *osfd = ss->fd->lower;
int rv;
PRIntn sslHow = nsprHow + 1;
if ((unsigned)nsprHow > PR_SHUTDOWN_BOTH) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
return PR_FAILURE;
}
if ((sslHow & ssl_SHUTDOWN_SEND) != 0 &&
ss->version >= SSL_LIBRARY_VERSION_3_0 &&
!(ss->shutdownHow & ssl_SHUTDOWN_SEND) &&
ss->firstHsDone &&
!ss->recvdCloseNotify &&
ss->ssl3.initialized) {
(void) SSL3_SendAlert(ss, alert_warning, close_notify);
}
rv = osfd->methods->shutdown(osfd, nsprHow);
ss->shutdownHow |= sslHow;
return rv;
}
/************************************************************************/
int
ssl_SecureRecv(sslSocket *ss, unsigned char *buf, int len, int flags)
{
sslSecurityInfo *sec;
int rv = 0;
sec = &ss->sec;
if (ss->shutdownHow & ssl_SHUTDOWN_RCV) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
return PR_FAILURE;
}
if (flags & ~PR_MSG_PEEK) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
return PR_FAILURE;
}
if (!ssl_SocketIsBlocking(ss) && !ss->opt.fdx) {
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
rv = ssl_SendSavedWriteData(ss);
if ((rv < 0) && (PORT_GetError() != PR_WOULD_BLOCK_ERROR)) {
ssl_ReleaseXmitBufLock(ss);
return SECFailure;
}
/* XXX short write? */
}
ssl_ReleaseXmitBufLock(ss);
}
rv = 0;
/* If any of these is non-zero, the initial handshake is not done. */
if (!ss->firstHsDone) {
ssl_Get1stHandshakeLock(ss);
if (ss->handshake || ss->nextHandshake || ss->securityHandshake) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
return rv;
}
if (len == 0) return 0;
rv = DoRecv(ss, (unsigned char*) buf, len, flags);
SSL_TRC(2, ("%d: SSL[%d]: recving %d bytes securely (errno=%d)",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
return rv;
}
int
ssl_SecureRead(sslSocket *ss, unsigned char *buf, int len)
{
return ssl_SecureRecv(ss, buf, len, 0);
}
/* Caller holds the SSL Socket's write lock. SSL_LOCK_WRITER(ss) */
int
ssl_SecureSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
{
int rv = 0;
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: sending %d bytes",
SSL_GETPID(), ss->fd, len));
if (ss->shutdownHow & ssl_SHUTDOWN_SEND) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
rv = PR_FAILURE;
goto done;
}
if (flags) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
rv = ssl_SendSavedWriteData(ss);
if (rv >= 0 && ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
PORT_SetError(PR_WOULD_BLOCK_ERROR);
rv = SECFailure;
}
}
ssl_ReleaseXmitBufLock(ss);
if (rv < 0) {
goto done;
}
if (len > 0)
ss->writerThread = PR_GetCurrentThread();
/* If any of these is non-zero, the initial handshake is not done. */
if (!ss->firstHsDone) {
PRBool canFalseStart = PR_FALSE;
ssl_Get1stHandshakeLock(ss);
if (ss->version >= SSL_LIBRARY_VERSION_3_0 &&
(ss->ssl3.hs.ws == wait_change_cipher ||
ss->ssl3.hs.ws == wait_finished ||
ss->ssl3.hs.ws == wait_new_session_ticket) &&
ssl3_CanFalseStart(ss)) {
canFalseStart = PR_TRUE;
}
if (!canFalseStart &&
(ss->handshake || ss->nextHandshake || ss->securityHandshake)) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
ss->writerThread = NULL;
goto done;
}
/* Check for zero length writes after we do housekeeping so we make forward
* progress.
*/
if (len == 0) {
rv = 0;
goto done;
}
PORT_Assert(buf != NULL);
if (!buf) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
/* Send out the data using one of these functions:
* ssl2_SendClear, ssl2_SendStream, ssl2_SendBlock,
* ssl3_SendApplicationData
*/
ssl_GetXmitBufLock(ss);
rv = (*ss->sec.send)(ss, buf, len, flags);
ssl_ReleaseXmitBufLock(ss);
ss->writerThread = NULL;
done:
if (rv < 0) {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count, error %d",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
} else {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count",
SSL_GETPID(), ss->fd, rv));
}
return rv;
}
int
ssl_SecureWrite(sslSocket *ss, const unsigned char *buf, int len)
{
return ssl_SecureSend(ss, buf, len, 0);
}
SECStatus
SSL_BadCertHook(PRFileDesc *fd, SSLBadCertHandler f, void *arg)
{
sslSocket *ss;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in SSLBadCertHook",
SSL_GETPID(), fd));
return SECFailure;
}
ss->handleBadCert = f;
ss->badCertArg = arg;
return SECSuccess;
}
/*
* Allow the application to pass the url or hostname into the SSL library
* so that we can do some checking on it. It will be used for the value in
* SNI extension of client hello message.
*/
SECStatus
SSL_SetURL(PRFileDesc *fd, const char *url)
{
sslSocket * ss = ssl_FindSocket(fd);
SECStatus rv = SECSuccess;
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in SSLSetURL",
SSL_GETPID(), fd));
return SECFailure;
}
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
if ( ss->url ) {
PORT_Free((void *)ss->url); /* CONST */
}
ss->url = (const char *)PORT_Strdup(url);
if ( ss->url == NULL ) {
rv = SECFailure;
}
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
return rv;
}
/*
* Allow the application to pass the set of trust anchors
*/
SECStatus
SSL_SetTrustAnchors(PRFileDesc *fd, CERTCertList *certList)
{
sslSocket * ss = ssl_FindSocket(fd);
CERTDistNames *names = NULL;
if (!certList) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in SSL_SetTrustAnchors",
SSL_GETPID(), fd));
return SECFailure;
}
names = CERT_DistNamesFromCertList(certList);
if (names == NULL) {
return SECFailure;
}
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
if (ss->ssl3.ca_list) {
CERT_FreeDistNames(ss->ssl3.ca_list);
}
ss->ssl3.ca_list = names;
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
return SECSuccess;
}
/*
** Returns Negative number on error, zero or greater on success.
** Returns the amount of data immediately available to be read.
*/
int
SSL_DataPending(PRFileDesc *fd)
{
sslSocket *ss;
int rv = 0;
ss = ssl_FindSocket(fd);
if (ss && ss->opt.useSecurity) {
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
ssl_GetRecvBufLock(ss);
rv = ss->gs.writeOffset - ss->gs.readOffset;
ssl_ReleaseRecvBufLock(ss);
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
}
return rv;
}
SECStatus
SSL_InvalidateSession(PRFileDesc *fd)
{
sslSocket * ss = ssl_FindSocket(fd);
SECStatus rv = SECFailure;
if (ss) {
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
if (ss->sec.ci.sid) {
ss->sec.uncache(ss->sec.ci.sid);
rv = SECSuccess;
}
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
}
return rv;
}
SECItem *
SSL_GetSessionID(PRFileDesc *fd)
{
sslSocket * ss;
SECItem * item = NULL;
ss = ssl_FindSocket(fd);
if (ss) {
ssl_Get1stHandshakeLock(ss);
ssl_GetSSL3HandshakeLock(ss);
if (ss->opt.useSecurity && ss->firstHsDone && ss->sec.ci.sid) {
item = (SECItem *)PORT_Alloc(sizeof(SECItem));
if (item) {
sslSessionID * sid = ss->sec.ci.sid;
if (sid->version < SSL_LIBRARY_VERSION_3_0) {
item->len = SSL2_SESSIONID_BYTES;
item->data = (unsigned char*)PORT_Alloc(item->len);
PORT_Memcpy(item->data, sid->u.ssl2.sessionID, item->len);
} else {
item->len = sid->u.ssl3.sessionIDLength;
item->data = (unsigned char*)PORT_Alloc(item->len);
PORT_Memcpy(item->data, sid->u.ssl3.sessionID, item->len);
}
}
}
ssl_ReleaseSSL3HandshakeLock(ss);
ssl_Release1stHandshakeLock(ss);
}
return item;
}
SECStatus
SSL_CertDBHandleSet(PRFileDesc *fd, CERTCertDBHandle *dbHandle)
{
sslSocket * ss;
ss = ssl_FindSocket(fd);
if (!ss)
return SECFailure;
if (!dbHandle) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
ss->dbHandle = dbHandle;
return SECSuccess;
}
/*
* attempt to restart the handshake after asynchronously handling
* a request for the client's certificate.
*
* inputs:
* cert Client cert chosen by application.
* Note: ssl takes this reference, and does not bump the
* reference count. The caller should drop its reference
* without calling CERT_DestroyCert after calling this function.
*
* key Private key associated with cert. This function makes a
* copy of the private key, so the caller remains responsible
* for destroying its copy after this function returns.
*
* certChain Chain of signers for cert.
* Note: ssl takes this reference, and does not copy the chain.
* The caller should drop its reference without destroying the
* chain. SSL will free the chain when it is done with it.
*
* Return value: XXX
*
* XXX This code only works on the initial handshake on a connection, XXX
* It does not work on a subsequent handshake (redo).
*/
int
SSL_RestartHandshakeAfterCertReq(sslSocket * ss,
CERTCertificate * cert,
SECKEYPrivateKey * key,
CERTCertificateList *certChain)
{
int ret;
ssl_Get1stHandshakeLock(ss); /************************************/
if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
ret = ssl3_RestartHandshakeAfterCertReq(ss, cert, key, certChain);
} else {
ret = ssl2_RestartHandshakeAfterCertReq(ss, cert, key);
}
ssl_Release1stHandshakeLock(ss); /************************************/
return ret;
}
/* restart an SSL connection that we stopped to run certificate dialogs
** XXX Need to document here how an application marks a cert to show that
** the application has accepted it (overridden CERT_VerifyCert).
*
* XXX This code only works on the initial handshake on a connection, XXX
* It does not work on a subsequent handshake (redo).
*
* Return value: XXX
*/
int
SSL_RestartHandshakeAfterServerCert(sslSocket *ss)
{
int rv = SECSuccess;
ssl_Get1stHandshakeLock(ss);
if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
rv = ssl3_RestartHandshakeAfterServerCert(ss);
} else {
rv = ssl2_RestartHandshakeAfterServerCert(ss);
}
ssl_Release1stHandshakeLock(ss);
return rv;
}
/* For more info see ssl.h */
SECStatus
SSL_SNISocketConfigHook(PRFileDesc *fd, SSLSNISocketConfig func,
void *arg)
{
sslSocket *ss;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in SNISocketConfigHook",
SSL_GETPID(), fd));
return SECFailure;
}
ss->sniSocketConfig = func;
ss->sniSocketConfigArg = arg;
return SECSuccess;
}
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