nss: import at 3.0.1 beta 1

[mozilla-nss.git] / security / nss / cmd / vfyserv / vfyutil.c

/* ***** 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):
 *
 * 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 ***** */

#include "vfyserv.h"
#include "secerr.h"
#include "sslerr.h"
#include "nspr.h"
#include "secutil.h"


extern PRBool dumpChain;
extern void dumpCertChain(CERTCertificate *, SECCertUsage);

/* Declare SSL cipher suites. */

int ssl2CipherSuites[] = {
    SSL_EN_RC4_128_WITH_MD5,              /* A */
    SSL_EN_RC4_128_EXPORT40_WITH_MD5,     /* B */
    SSL_EN_RC2_128_CBC_WITH_MD5,          /* C */
    SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5, /* D */
    SSL_EN_DES_64_CBC_WITH_MD5,           /* E */
    SSL_EN_DES_192_EDE3_CBC_WITH_MD5,     /* F */
    0
};

int ssl3CipherSuites[] = {
    -1, /* SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA* a */
    -1, /* SSL_FORTEZZA_DMS_WITH_RC4_128_SHA,    * b */
    SSL_RSA_WITH_RC4_128_MD5,                   /* c */
    SSL_RSA_WITH_3DES_EDE_CBC_SHA,              /* d */
    SSL_RSA_WITH_DES_CBC_SHA,                   /* e */
    SSL_RSA_EXPORT_WITH_RC4_40_MD5,             /* f */
    SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5,         /* g */
    -1, /* SSL_FORTEZZA_DMS_WITH_NULL_SHA,       * h */
    SSL_RSA_WITH_NULL_MD5,                      /* i */
    SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA,         /* j */
    SSL_RSA_FIPS_WITH_DES_CBC_SHA,              /* k */
    TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA,        /* l */
    TLS_RSA_EXPORT1024_WITH_RC4_56_SHA,         /* m */
    SSL_RSA_WITH_RC4_128_SHA,                   /* n */
    TLS_DHE_DSS_WITH_RC4_128_SHA,               /* o */
    SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA,          /* p */
    SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA,          /* q */
    SSL_DHE_RSA_WITH_DES_CBC_SHA,               /* r */
    SSL_DHE_DSS_WITH_DES_CBC_SHA,               /* s */
    TLS_DHE_DSS_WITH_AES_128_CBC_SHA,           /* t */
    TLS_DHE_RSA_WITH_AES_128_CBC_SHA,           /* u */
    TLS_RSA_WITH_AES_128_CBC_SHA,               /* v */
    TLS_DHE_DSS_WITH_AES_256_CBC_SHA,           /* w */
    TLS_DHE_RSA_WITH_AES_256_CBC_SHA,           /* x */
    TLS_RSA_WITH_AES_256_CBC_SHA,               /* y */
    SSL_RSA_WITH_NULL_SHA,                      /* z */
    0
};

/**************************************************************************
** 
** SSL callback routines.
**
**************************************************************************/

/* Function: char * myPasswd()
 * 
 * Purpose: This function is our custom password handler that is called by
 * SSL when retreiving private certs and keys from the database. Returns a
 * pointer to a string that with a password for the database. Password pointer
 * should point to dynamically allocated memory that will be freed later.
 */
char *
myPasswd(PK11SlotInfo *info, PRBool retry, void *arg)
{
    char * passwd = NULL;

    if ( (!retry) && arg ) {
        passwd = PORT_Strdup((char *)arg);
    }
    return passwd;
}

/* Function: SECStatus myAuthCertificate()
 *
 * Purpose: This function is our custom certificate authentication handler.
 * 
 * Note: This implementation is essentially the same as the default 
 *       SSL_AuthCertificate().
 */
SECStatus 
myAuthCertificate(void *arg, PRFileDesc *socket, 
                  PRBool checksig, PRBool isServer) 
{

    SECCertificateUsage certUsage;
    CERTCertificate *   cert;
    void *              pinArg;
    char *              hostName;
    SECStatus           secStatus;

    if (!arg || !socket) {
        errWarn("myAuthCertificate");
        return SECFailure;
    }

    /* Define how the cert is being used based upon the isServer flag. */

    certUsage = isServer ? certificateUsageSSLClient : certificateUsageSSLServer;

    cert = SSL_PeerCertificate(socket);
        
    pinArg = SSL_RevealPinArg(socket);
    
    if (dumpChain == PR_TRUE) {
        dumpCertChain(cert, certUsage);
    }

    secStatus = CERT_VerifyCertificateNow((CERTCertDBHandle *)arg,
                                   cert,
                                   checksig,
                                   certUsage,
                                   pinArg,
                                   NULL);

    /* If this is a server, we're finished. */
    if (isServer || secStatus != SECSuccess) {
        SECU_printCertProblems(stderr, (CERTCertDBHandle *)arg, cert, 
                          checksig, certUsage, pinArg, PR_FALSE);
        CERT_DestroyCertificate(cert);
        return secStatus;
    }

    /* Certificate is OK.  Since this is the client side of an SSL
     * connection, we need to verify that the name field in the cert
     * matches the desired hostname.  This is our defense against
     * man-in-the-middle attacks.
     */

    /* SSL_RevealURL returns a hostName, not an URL. */
    hostName = SSL_RevealURL(socket);

    if (hostName && hostName[0]) {
        secStatus = CERT_VerifyCertName(cert, hostName);
    } else {
        PR_SetError(SSL_ERROR_BAD_CERT_DOMAIN, 0);
        secStatus = SECFailure;
    }

    if (hostName)
        PR_Free(hostName);

    CERT_DestroyCertificate(cert);
    return secStatus;
}

/* Function: SECStatus myBadCertHandler()
 *
 * Purpose: This callback is called when the incoming certificate is not
 * valid. We define a certain set of parameters that still cause the
 * certificate to be "valid" for this session, and return SECSuccess to cause
 * the server to continue processing the request when any of these conditions
 * are met. Otherwise, SECFailure is return and the server rejects the 
 * request.
 */
SECStatus 
myBadCertHandler(void *arg, PRFileDesc *socket) 
{

    SECStatus   secStatus = SECFailure;
    PRErrorCode err;

    /* log invalid cert here */

    if (!arg) {
        return secStatus;
    }

    *(PRErrorCode *)arg = err = PORT_GetError();

    /* If any of the cases in the switch are met, then we will proceed   */
    /* with the processing of the request anyway. Otherwise, the default */     
    /* case will be reached and we will reject the request.              */

    switch (err) {
    case SEC_ERROR_INVALID_AVA:
    case SEC_ERROR_INVALID_TIME:
    case SEC_ERROR_BAD_SIGNATURE:
    case SEC_ERROR_EXPIRED_CERTIFICATE:
    case SEC_ERROR_UNKNOWN_ISSUER:
    case SEC_ERROR_UNTRUSTED_CERT:
    case SEC_ERROR_CERT_VALID:
    case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
    case SEC_ERROR_CRL_EXPIRED:
    case SEC_ERROR_CRL_BAD_SIGNATURE:
    case SEC_ERROR_EXTENSION_VALUE_INVALID:
    case SEC_ERROR_CA_CERT_INVALID:
    case SEC_ERROR_CERT_USAGES_INVALID:
    case SEC_ERROR_UNKNOWN_CRITICAL_EXTENSION:
        secStatus = SECSuccess;
        break;
    default:
        secStatus = SECFailure;
        break;
    }

    fprintf(stderr, "Bad certificate: %d, %s\n", err, SECU_Strerror(err));

    return secStatus;
}

/* Function: SECStatus ownGetClientAuthData()
 *
 * Purpose: This callback is used by SSL to pull client certificate 
 * information upon server request.
 */
SECStatus 
myGetClientAuthData(void *arg,
                    PRFileDesc *socket,
                    struct CERTDistNamesStr *caNames,
                    struct CERTCertificateStr **pRetCert,
                    struct SECKEYPrivateKeyStr **pRetKey) 
{

    CERTCertificate *  cert;
    SECKEYPrivateKey * privKey;
    char *             chosenNickName = (char *)arg;
    void *             proto_win      = NULL;
    SECStatus          secStatus      = SECFailure;

    proto_win = SSL_RevealPinArg(socket);

    if (chosenNickName) {
        cert = PK11_FindCertFromNickname(chosenNickName, proto_win);
        if (cert) {
            privKey = PK11_FindKeyByAnyCert(cert, proto_win);
            if (privKey) {
                secStatus = SECSuccess;
            } else {
                CERT_DestroyCertificate(cert);
            }
        }
    } else { /* no nickname given, automatically find the right cert */
        CERTCertNicknames *names;
        int                i;

        names = CERT_GetCertNicknames(CERT_GetDefaultCertDB(), 
                                      SEC_CERT_NICKNAMES_USER, proto_win);

        if (names != NULL) {
            for(i = 0; i < names->numnicknames; i++ ) {

                cert = PK11_FindCertFromNickname(names->nicknames[i], 
                                                 proto_win);
                if (!cert) {
                    continue;
                }

                /* Only check unexpired certs */
                if (CERT_CheckCertValidTimes(cert, PR_Now(), PR_FALSE)
                      != secCertTimeValid ) {
                    CERT_DestroyCertificate(cert);
                    continue;
                }

                secStatus = NSS_CmpCertChainWCANames(cert, caNames);
                if (secStatus == SECSuccess) {
                    privKey = PK11_FindKeyByAnyCert(cert, proto_win);
                    if (privKey) {
                        break;
                    }
                    secStatus = SECFailure;
                }
                CERT_DestroyCertificate(cert);
            } /* for loop */
            CERT_FreeNicknames(names);
        }
    }

    if (secStatus == SECSuccess) {
        *pRetCert = cert;
        *pRetKey  = privKey;
    }

    return secStatus;
}

/* Function: void myHandshakeCallback()
 *
 * Purpose: Called by SSL to inform application that the handshake is
 * complete. This function is mostly used on the server side of an SSL
 * connection, although it is provided for a client as well.
 * Useful when a non-blocking SSL_ReHandshake or SSL_ResetHandshake 
 * is used to initiate a handshake.
 *
 * A typical scenario would be:
 *
 * 1. Server accepts an SSL connection from the client without client auth.
 * 2. Client sends a request.
 * 3. Server determines that to service request it needs to authenticate the
 * client and initiates another handshake requesting client auth.
 * 4. While handshake is in progress, server can do other work or spin waiting
 * for the handshake to complete.
 * 5. Server is notified that handshake has been successfully completed by
 * the custom handshake callback function and it can service the client's
 * request.
 *
 * Note: This function is not implemented in this sample, as we are using
 * blocking sockets.
 */
void
myHandshakeCallback(PRFileDesc *socket, void *arg) 
{
    fprintf(stderr,"Handshake Complete: SERVER CONFIGURED CORRECTLY\n");
}


/**************************************************************************
** 
** Routines for disabling SSL ciphers.
**
**************************************************************************/

void
disableAllSSLCiphers(void)
{
    const PRUint16 *cipherSuites = SSL_ImplementedCiphers;
    int             i            = SSL_NumImplementedCiphers;
    SECStatus       rv;

    /* disable all the SSL3 cipher suites */
    while (--i >= 0) {
        PRUint16 suite = cipherSuites[i];
        rv = SSL_CipherPrefSetDefault(suite, PR_FALSE);
        if (rv != SECSuccess) {
            fprintf(stderr,
                "SSL_CipherPrefSetDefault didn't like value 0x%04x (i = %d)\n",
                   suite, i);
            errWarn("SSL_CipherPrefSetDefault");
            exit(2);
        }
    }
}

/**************************************************************************
** 
** Error and information routines.
**
**************************************************************************/

void
errWarn(char *function)
{
    PRErrorCode  errorNumber = PR_GetError();
    const char * errorString = SECU_Strerror(errorNumber);

    fprintf(stderr, "Error in function %s: %d\n - %s\n",
                    function, errorNumber, errorString);
}

void
exitErr(char *function)
{
    errWarn(function);
    /* Exit gracefully. */
    /* ignoring return value of NSS_Shutdown as code exits with 1 anyway*/
    (void) NSS_Shutdown();
    PR_Cleanup();
    exit(1);
}

void 
printSecurityInfo(FILE *outfile, PRFileDesc *fd)
{
    char * cp;  /* bulk cipher name */
    char * ip;  /* cert issuer DN */
    char * sp;  /* cert subject DN */
    int    op;  /* High, Low, Off */
    int    kp0; /* total key bits */
    int    kp1; /* secret key bits */
    int    result;
    SSL3Statistics * ssl3stats = SSL_GetStatistics();

    if (!outfile) {
        outfile = stdout;
    }

    result = SSL_SecurityStatus(fd, &op, &cp, &kp0, &kp1, &ip, &sp);
    if (result != SECSuccess)
        return;
    fprintf(outfile,
     "   bulk cipher %s, %d secret key bits, %d key bits, status: %d\n"
     "   subject DN:\n %s\n"
     "   issuer  DN:\n %s\n", cp, kp1, kp0, op, sp, ip);
    PR_Free(cp);
    PR_Free(ip);
    PR_Free(sp);

    fprintf(outfile,
      "   %ld cache hits; %ld cache misses, %ld cache not reusable\n",
            ssl3stats->hch_sid_cache_hits, ssl3stats->hch_sid_cache_misses,
    ssl3stats->hch_sid_cache_not_ok);

}


/**************************************************************************
** Begin thread management routines and data.
**************************************************************************/

void
thread_wrapper(void * arg)
{
    GlobalThreadMgr *threadMGR = (GlobalThreadMgr *)arg;
    perThread *slot = &threadMGR->threads[threadMGR->index];

    /* wait for parent to finish launching us before proceeding. */
    PR_Lock(threadMGR->threadLock);
    PR_Unlock(threadMGR->threadLock);

    slot->rv = (* slot->startFunc)(slot->a, slot->b);

    PR_Lock(threadMGR->threadLock);
    slot->running = rs_zombie;

    /* notify the thread exit handler. */
    PR_NotifyCondVar(threadMGR->threadEndQ);

    PR_Unlock(threadMGR->threadLock);
}

SECStatus
launch_thread(GlobalThreadMgr *threadMGR,
              startFn         *startFunc,
              void            *a,
              int              b)
{
    perThread *slot;
    int        i;

    if (!threadMGR->threadStartQ) {
        threadMGR->threadLock   = PR_NewLock();
        threadMGR->threadStartQ = PR_NewCondVar(threadMGR->threadLock);
        threadMGR->threadEndQ   = PR_NewCondVar(threadMGR->threadLock);
    }
    PR_Lock(threadMGR->threadLock);
    while (threadMGR->numRunning >= MAX_THREADS) {
        PR_WaitCondVar(threadMGR->threadStartQ, PR_INTERVAL_NO_TIMEOUT);
    }
    for (i = 0; i < threadMGR->numUsed; ++i) {
        slot = &threadMGR->threads[i];
        if (slot->running == rs_idle) 
            break;
    }
    if (i >= threadMGR->numUsed) {
        if (i >= MAX_THREADS) {
            /* something's really wrong here. */
            PORT_Assert(i < MAX_THREADS);
            PR_Unlock(threadMGR->threadLock);
            return SECFailure;
        }
        ++(threadMGR->numUsed);
        PORT_Assert(threadMGR->numUsed == i + 1);
        slot = &threadMGR->threads[i];
    }

    slot->a = a;
    slot->b = b;
    slot->startFunc = startFunc;

    threadMGR->index = i;

    slot->prThread = PR_CreateThread(PR_USER_THREAD,
                                     thread_wrapper, threadMGR,
                                     PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
                                     PR_JOINABLE_THREAD, 0);

    if (slot->prThread == NULL) {
        PR_Unlock(threadMGR->threadLock);
        printf("Failed to launch thread!\n");
        return SECFailure;
    } 

    slot->inUse   = 1;
    slot->running = 1;
    ++(threadMGR->numRunning);
    PR_Unlock(threadMGR->threadLock);

    return SECSuccess;
}

SECStatus 
reap_threads(GlobalThreadMgr *threadMGR)
{
    perThread * slot;
    int                 i;

    if (!threadMGR->threadLock)
        return SECSuccess;
    PR_Lock(threadMGR->threadLock);
    while (threadMGR->numRunning > 0) {
        PR_WaitCondVar(threadMGR->threadEndQ, PR_INTERVAL_NO_TIMEOUT);
        for (i = 0; i < threadMGR->numUsed; ++i) {
            slot = &threadMGR->threads[i];
            if (slot->running == rs_zombie)  {
                /* Handle cleanup of thread here. */

                /* Now make sure the thread has ended OK. */
                PR_JoinThread(slot->prThread);
                slot->running = rs_idle;
                --threadMGR->numRunning;

                /* notify the thread launcher. */
                PR_NotifyCondVar(threadMGR->threadStartQ);
            }
        }
    }

    /* Safety Sam sez: make sure count is right. */
    for (i = 0; i < threadMGR->numUsed; ++i) {
        slot = &threadMGR->threads[i];
        if (slot->running != rs_idle)  {
            fprintf(stderr, "Thread in slot %d is in state %d!\n", 
                             i, slot->running);
        }
    }
    PR_Unlock(threadMGR->threadLock);
    return SECSuccess;
}

void
destroy_thread_data(GlobalThreadMgr *threadMGR)
{
    PORT_Memset(threadMGR->threads, 0, sizeof(threadMGR->threads));

    if (threadMGR->threadEndQ) {
        PR_DestroyCondVar(threadMGR->threadEndQ);
        threadMGR->threadEndQ = NULL;
    }
    if (threadMGR->threadStartQ) {
        PR_DestroyCondVar(threadMGR->threadStartQ);
        threadMGR->threadStartQ = NULL;
    }
    if (threadMGR->threadLock) {
        PR_DestroyLock(threadMGR->threadLock);
        threadMGR->threadLock = NULL;
    }
}

/**************************************************************************
** End   thread management routines.
**************************************************************************/

void 
lockedVars_Init( lockedVars * lv)
{
    lv->count   = 0;
    lv->waiters = 0;
    lv->lock    = PR_NewLock();
    lv->condVar = PR_NewCondVar(lv->lock);
}

void
lockedVars_Destroy( lockedVars * lv)
{
    PR_DestroyCondVar(lv->condVar);
    lv->condVar = NULL;

    PR_DestroyLock(lv->lock);
    lv->lock = NULL;
}

void
lockedVars_WaitForDone(lockedVars * lv)
{
    PR_Lock(lv->lock);
    while (lv->count > 0) {
        PR_WaitCondVar(lv->condVar, PR_INTERVAL_NO_TIMEOUT);
    }
    PR_Unlock(lv->lock);
}

int     /* returns count */
lockedVars_AddToCount(lockedVars * lv, int addend)
{
    int rv;

    PR_Lock(lv->lock);
    rv = lv->count += addend;
    if (rv <= 0) {
        PR_NotifyCondVar(lv->condVar);
    }
    PR_Unlock(lv->lock);
    return rv;
}


/*
 * Dump cert chain in to cert.* files. This function is will
 * create collisions while dumping cert chains if called from
 * multiple treads. But it should not be a problem since we
 * consider vfyserv to be single threaded(see bug 353477).
 */

void
dumpCertChain(CERTCertificate *cert, SECCertUsage usage)
{
    CERTCertificateList *certList;
    int count = 0;

    certList = CERT_CertChainFromCert(cert, usage, PR_TRUE);
    if (certList == NULL) {
        errWarn("CERT_CertChainFromCert");
        return;
    }

    for(count = 0; count < (unsigned int)certList->len; count++) {
        char certFileName[16];
        PRFileDesc *cfd;

        PR_snprintf(certFileName, sizeof certFileName, "cert.%03d",
                    count);
        cfd = PR_Open(certFileName, PR_WRONLY|PR_CREATE_FILE|PR_TRUNCATE, 
                      0664);
        if (!cfd) {
            PR_fprintf(PR_STDOUT,
                       "Error: couldn't save cert der in file '%s'\n",
                       certFileName);
        } else {
            PR_Write(cfd,  certList->certs[count].data,  certList->certs[count].len);
            PR_Close(cfd);
            PR_fprintf(PR_STDOUT, "Cert file %s was created.\n", certFileName);
        }
    }
    CERT_DestroyCertificateList(certList);
}