ctrlconn.c

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 
 * 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 Netscape are 
 * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */
#include "ctrlconn.h"
#include "dataconn.h"
#include "sslconn.h"
#include "p7cinfo.h"
#include "p7econn.h"
#include "p7dconn.h"
#include "secmime.h"
#include "hashconn.h"
#include "certres.h"
#include "cert.h"
#include "certdb.h"
#include "servimpl.h"
#include "newproto.h"
#include "messages.h"
#include "serv.h"
#include "ssmerrs.h"
#include "minihttp.h"
#include "secmod.h"
#include "kgenctxt.h"
#include "advisor.h"
#include "processmsg.h"
#include "signtextres.h"
#include "p12res.h"
#include "p12plcy.h"
#include "secmime.h"
#include "ciferfam.h"
#include "profile.h"
#include "prefs.h"
#include "ocsp.h"
#ifdef XP_MAC
#include "CCompleteApp.h"
#endif

/*
 * The structure passed to get an attribute for the control connection,
 * which may require a password prompt.
 */
typedef struct GetAttrArgStr {
    SSMResource *res;
    SSMAttributeID attrID;
    SSMResourceAttrType attrType;
} GetAttrArg;

static SSMStatus
ssmcontrolconnection_encodegetattr_reply(SECItem *msg, SSMStatus rv, 
                                         SSMAttributeValue *value,
                                         SSMResourceAttrType attrType);


/* The ONLY reason why we can use these macros for both control and
   data connections is that they inherit from the same superclass.
 */
#define SSMCONNECTION(c) (&(c)->super)
#define SSMRESOURCE(c) (&(c)->super.super)

/* Special resource id values */
#define SSM_BASE_RID  0x00000003
#define SSM_MAX_RID   0x0FFFFFFF


static long ssm_ctrl_count = 0;
static SSMResourceID ssm_next_ctrlrid = SSM_MAX_RID;
static char * gUserDir = NULL;

int RecvInitObscureData(PRFileDesc *fd, SSMObscureObject * obj, void * buf, int bufSize );
int SendInitObscureData(PRFileDesc *fd, SSMObscureObject * obj);

static PRMonitor *policySetLock = NULL;
static PRBool policySet = PR_FALSE;

SSMStatus SSM_InitPolicyHandler(void)
{
    policySetLock = PR_NewMonitor();
    if (policySetLock == NULL) {
        return PR_FAILURE;
    }
    return PR_SUCCESS;
}


#ifdef TIMEBOMB
#include "timebomb.h"
PRBool SSMTimeBombExpired = PR_FALSE;
#endif


SSMStatus SSMControlConnection_Create(void *arg, 
                                     SSMControlConnection * connection, 
                                     SSMResource **res)
{
    SSMStatus rv = PR_SUCCESS;
    SSMControlConnection *conn;
    *res = NULL; /* in case we fail */
    
    conn = (SSMControlConnection *) PR_CALLOC(sizeof(SSMControlConnection));
    if (!conn) goto loser;
    
    SSMRESOURCE(conn)->m_connection = conn;
    rv = SSMControlConnection_Init(conn, SSM_RESTYPE_CONTROL_CONNECTION, 
                                   (PRFileDesc *) arg);
    if (rv != PR_SUCCESS) 
        goto loser;
   
    SSMControlConnection_Invariant(conn);

    ssm_ctrl_count++;
    SSM_DEBUG("Control count is now %ld.\n", ssm_ctrl_count);

    *res = SSMRESOURCE(conn);
    rv = SSM_HashInsert(ctrlConnections, (SSMHashKey)(*res)->m_id, 
                        (void *)*res);
    if (rv != PR_SUCCESS) 
        goto loser;

    return PR_SUCCESS;

 loser:
    if (rv == PR_SUCCESS) rv = PR_FAILURE;

    if (conn) 
    {
        SSM_ShutdownResource(SSMRESOURCE(conn), rv); /* force destroy */
        SSM_FreeResource(SSMRESOURCE(conn));
    }
       
    return rv;
}

SSMStatus SSMControlConnection_GenerateNonce(SSMControlConnection *conn)
{
    char *n = PR_smprintf("nonce%d%d%d", rand(), rand(), rand());
    conn->m_nonce = n;
    return (n ? PR_SUCCESS : PR_FAILURE);
}

int
RecvInitObscureData(PRFileDesc *fd, SSMObscureObject * obj, void * buf, int bufSize )
{
    SSMObscureBool done = 0;
    int rv = -1;

    do {
	    int cc;
        cc = PR_Recv(fd, buf, bufSize, 0, PR_INTERVAL_NO_TIMEOUT);
        if (cc <= 0)
            return -1;
        rv = SSMObscure_RecvInit(obj, buf, cc, &done);
    } while (!done);
    return rv;
}

/* returns -1 on error, 0 on success. */
int
SendInitObscureData(PRFileDesc *fd, SSMObscureObject * obj)
{
    unsigned char * initBuf = NULL;
    int             rv      = -1;

    do {
        int bufLen;
        int len;
        int cc;

        bufLen = SSMObscure_SendInit(obj, NULL);
        if (bufLen <= 0)
	        break;

        initBuf = (unsigned char *) malloc(bufLen);
        if (!initBuf)
	        break;

        len = SSMObscure_SendInit(obj, initBuf);
        if (len != bufLen)
            break;

        cc = PR_Send(fd, initBuf, len, 0, PR_INTERVAL_NO_TIMEOUT);

        /* Note, this code assumes a blocking socket, 
        ** and hence doesn't deal with short writes.
        */
        if (cc < len) 
	        break;

    	rv = 0;

    } while (0);

    if (initBuf) {
    	free(initBuf);
    	initBuf = NULL;
    }
    return rv;
}

SSMObscureObject* InitServerObscureObject(PRFileDesc *fd)
{
    SSMObscureObject *sobj = NULL;
    unsigned char buf[512];
    int rv = -1;

    sobj = SSMObscure_Create(1);
    if (!sobj) {
        goto loser;
    }

    rv = RecvInitObscureData(fd, sobj, buf, sizeof(buf));
    if (rv < 0) {
        goto loser;
    }

    rv = SendInitObscureData(fd, sobj);
    if (rv < 0) {
        goto loser;
    }

    return sobj;
loser:
    if (sobj) {
        SSMObscure_Destroy(sobj);
    }
    return NULL;
}

SSMStatus SSMControlConnection_Init(SSMControlConnection *conn, 
                                   SSMResourceType type,
                                   PRFileDesc *socket)
{
    SSMStatus rv = PR_SUCCESS;
    PRBool locked = PR_FALSE;
    PRNetAddr dataAddr;

    rv = SSM_HashCreate(&conn->m_resourceDB);
    if (rv != PR_SUCCESS || !conn->m_resourceDB) 
        goto loser;
    /* We need to see if there are any other control connections already
     * established.  If there are, then we need to use the next RID 
     * as ours so the correct control connection is found for UI events.
     * Before all control connections would get the RID of 3, and that would
     * cause problems.
     */
    conn->m_lastRID = ssm_next_ctrlrid;

    conn->m_secAdvisorList = NULL;
    rv = SSM_HashCreate(&conn->m_resourceIdDB);
    if (rv != PR_SUCCESS || conn->m_resourceIdDB == NULL)
        goto loser;

    rv = SSMConnection_Init(NULL, &conn->super, type);
    if (rv != PR_SUCCESS) goto loser;

    ssm_next_ctrlrid = conn->super.super.m_id;

    SSM_LockResource(SSMRESOURCE(conn));
    locked = PR_TRUE;

    /* Current version. Allow this to drop when the Hello request comes in. */
    conn->m_version = SSM_PROTOCOL_VERSION;

    /* Generate a nonce. */
    rv = SSMControlConnection_GenerateNonce(conn);
    if (rv != PR_SUCCESS) goto loser;
    SSM_DEBUG("Generated nonce of `%s'.\n",conn->m_nonce);

    conn->m_controlOutQ = SSM_NewCollection();
    if (!conn->m_controlOutQ) 
        goto loser;

    conn->m_socket = socket;

    /* Set up the protocol obscuring object */
    if (!(conn->m_obscureObj = InitServerObscureObject(conn->m_socket))) {
        goto loser;
    }

    /* Create the data socket */
    conn->m_dataSocket = SSM_OpenPort();
    if (!conn->m_dataSocket) {
        goto loser;
    }

    /* Get the data port */
    rv = PR_GetSockName(conn->m_dataSocket, &dataAddr);
    if (rv != PR_SUCCESS) {
        goto loser;
    }
    conn->m_dataPort = PR_ntohs(dataAddr.inet.port);

    SSMCONNECTION(conn)->m_auth_func = SSMControlConnection_Authenticate;
    
    /* Creat password handling stuff:temporary and long-term password tables */
    rv = SSM_HashCreate(&conn->m_passwdTable);
    if (rv != PR_SUCCESS || !conn->m_passwdTable) 
        goto loser;
    conn->m_passwdLock = PR_NewMonitor();
    if (!conn->m_passwdLock) 
        goto loser;
    conn->m_waiting = 0;
    rv = SSM_HashCreate(&conn->m_encrPasswdTable);
    if (rv != PR_SUCCESS || !conn->m_encrPasswdTable)
        goto loser;
    conn->m_encrPasswdLock = PR_NewMonitor();
    if (!conn->m_encrPasswdLock)
        goto loser;

    /* database for cert look-up by cert ID */
    rv = SSM_HashCreate(&conn->m_certIdDB);
    if (rv != PR_SUCCESS || !conn->m_certIdDB)
        goto loser;

    conn->m_prefs = PREF_NewPrefs();
    if (conn->m_prefs == NULL) {
        goto loser;
    }

    conn->m_doesUI = PR_FALSE;

    /* Spin threads after we set the shutdown function. */
    SSM_DEBUG("spawning read msg thread for %lx.\n", (long) conn);

#ifdef ALLOW_STANDALONE
    if (!standalone)
    {
#endif
        /* Get reference for front end thread */
        SSM_GetResourceReference(SSMRESOURCE(conn));
        conn->m_frontEndThread = SSM_CreateThread(SSMRESOURCE(conn),
                                                  SSM_FrontEndThread);
        if (conn->m_frontEndThread == NULL) 
            goto loser;

#ifdef ALLOW_STANDALONE
    }
#endif

    SSM_UnlockResource(SSMRESOURCE(conn));

    return PR_SUCCESS;

 loser:
    if (rv == PR_SUCCESS) rv = PR_FAILURE;
    if (locked)
        SSM_UnlockResource(SSMRESOURCE(conn));
    if (socket)
    {
        PR_Close(socket); /* close this */
        conn->m_socket = NULL;
    }
    if (conn->m_passwdLock) 
        PR_DestroyMonitor(conn->m_passwdLock);
    if (conn->m_passwdTable) 
        SSM_HashDestroy(conn->m_passwdTable);
    if (conn->m_encrPasswdLock) 
        PR_DestroyMonitor(conn->m_encrPasswdLock);
    if (conn->m_encrPasswdTable) 
        SSM_HashDestroy(conn->m_encrPasswdTable);
    if (conn->m_certIdDB) 
        SSM_HashDestroy(conn->m_certIdDB);
    if (conn->m_prefs)
        PREF_ClosePrefs(conn->m_prefs);
    if (conn->m_resourceDB) 
        SSM_HashDestroy(conn->m_resourceDB);
    if (conn->m_resourceIdDB)
        SSM_HashDestroy(conn->m_resourceIdDB);
    if (conn->m_obscureObj) {
        SSMObscure_Destroy(conn->m_obscureObj);
    }
 
    return rv;
}

SSMStatus SSMControlConnection_Shutdown(SSMResource *arg, SSMStatus status)
{
    SSMStatus rv, trv; /* rv propagates superclass shutdown */
    PRThread *closer = PR_GetCurrentThread();

    SSMControlConnection *conn = (SSMControlConnection *) arg;
    SSMControlConnection_Invariant(conn);
 
#ifdef TIMEBOMB
    if (SSMTimeBombExpired)
      return;
#endif

    SSM_LockResource(arg);
    
    /* if the thread calling this routine is a service thread,
       clear its place in the connection object. this is a
       prelude to the wakeup call just below. */
    arg->m_threadCount--; /* decrement if service thread */
    if (closer == conn->m_writeThread)
        conn->m_writeThread = NULL;
    if (closer == conn->m_frontEndThread)
        conn->m_frontEndThread = NULL;
    else
        arg->m_threadCount++; /* not a service thread, restore thread count */

    /* shut down our base class. */
    rv = SSMConnection_Shutdown(arg, status);

    /* wake up threads if this is the first time throwing an error */
    if ((arg->m_status != PR_SUCCESS) &&
        (rv != SSM_ERR_ALREADY_SHUT_DOWN))
    {
		SSM_DEBUG("First time aborting control connection.\n");
		SSM_DEBUG("Posting shutdown msgs to queues.\n");
        /* close queues that our threads may be listening on */
        if (conn->m_controlOutQ)