/* 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/. */
/*
* This file deals with PKCS #11 passwords and authentication.
*/
#include "seccomon.h"
#include "secmod.h"
#include "secmodi.h"
#include "secmodti.h"
#include "pkcs11t.h"
#include "pk11func.h"
#include "secitem.h"
#include "secerr.h"
#include "pkim.h"
/*************************************************************
* local static and global data
*************************************************************/
/*
* This structure keeps track of status that spans all the Slots.
* NOTE: This is a global data structure. It semantics expect thread crosstalk
* be very careful when you see it used.
* It's major purpose in life is to allow the user to log in one PER
* Tranaction, even if a transaction spans threads. The problem is the user
* may have to enter a password one just to be able to look at the
* personalities/certificates (s)he can use. Then if Auth every is one, they
* may have to enter the password again to use the card. See PK11_StartTransac
* and PK11_EndTransaction.
*/
static struct PK11GlobalStruct {
int transaction;
PRBool inTransaction;
char *(PR_CALLBACK *getPass)(PK11SlotInfo *,PRBool,void *);
PRBool (PR_CALLBACK *verifyPass)(PK11SlotInfo *,void *);
PRBool (PR_CALLBACK *isLoggedIn)(PK11SlotInfo *,void *);
} PK11_Global = { 1, PR_FALSE, NULL, NULL, NULL };
/***********************************************************
* Password Utilities
***********************************************************/
/*
* Check the user's password. Log into the card if it's correct.
* succeed if the user is already logged in.
*/
static SECStatus
pk11_CheckPassword(PK11SlotInfo *slot, CK_SESSION_HANDLE session,
char *pw, PRBool alreadyLocked, PRBool contextSpecific)
{
int len = 0;
CK_RV crv;
SECStatus rv;
PRTime currtime = PR_Now();
PRBool mustRetry;
int retry = 0;
if (slot->protectedAuthPath) {
len = 0;
pw = NULL;
} else if (pw == NULL) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
} else {
len = PORT_Strlen(pw);
}
do {
if (!alreadyLocked) PK11_EnterSlotMonitor(slot);
crv = PK11_GETTAB(slot)->C_Login(session,
contextSpecific ? CKU_CONTEXT_SPECIFIC : CKU_USER,
(unsigned char *)pw,len);
slot->lastLoginCheck = 0;
mustRetry = PR_FALSE;
if (!alreadyLocked) PK11_ExitSlotMonitor(slot);
switch (crv) {
/* if we're already logged in, we're good to go */
case CKR_OK:
/* TODO If it was for CKU_CONTEXT_SPECIFIC should we do this */
slot->authTransact = PK11_Global.transaction;
/* Fall through */
case CKR_USER_ALREADY_LOGGED_IN:
slot->authTime = currtime;
rv = SECSuccess;
break;
case CKR_PIN_INCORRECT:
PORT_SetError(SEC_ERROR_BAD_PASSWORD);
rv = SECWouldBlock; /* everything else is ok, only the pin is bad */
break;
/* someone called reset while we fetched the password, try again once
* if the token is still there. */
case CKR_SESSION_HANDLE_INVALID:
case CKR_SESSION_CLOSED:
if (session != slot->session) {
/* don't bother retrying, we were in a middle of an operation,
* which is now lost. Just fail. */
PORT_SetError(PK11_MapError(crv));
rv = SECFailure;
break;
}
if (retry++ == 0) {
rv = PK11_InitToken(slot,PR_FALSE);
if (rv == SECSuccess) {
if (slot->session != CK_INVALID_SESSION) {
session = slot->session; /* we should have
* a new session now */
mustRetry = PR_TRUE;
} else {
PORT_SetError(PK11_MapError(crv));
rv = SECFailure;
}
}
break;
}
/* Fall through */
default:
PORT_SetError(PK11_MapError(crv));
rv = SECFailure; /* some failure we can't fix by retrying */
}
} while (mustRetry);
return rv;
}
/*
* Check the user's password. Logout before hand to make sure that
* we are really checking the password.
*/
SECStatus
PK11_CheckUserPassword(PK11SlotInfo *slot, const char *pw)
{
int len = 0;
CK_RV crv;
SECStatus rv;
PRTime currtime = PR_Now();
if (slot->protectedAuthPath) {
len = 0;
pw = NULL;
} else if (pw == NULL) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
} else {
len = PORT_Strlen(pw);
}
/*
* If the token doesn't need a login, don't try to relogin because the
* effect is undefined. It's not clear what it means to check a non-empty
* password with such a token, so treat that as an error.
*/
if (!slot->needLogin) {
if (len == 0) {
rv = SECSuccess;
} else {
PORT_SetError(SEC_ERROR_BAD_PASSWORD);
rv = SECFailure;
}
return rv;
}
/* force a logout */
PK11_EnterSlotMonitor(slot);
PK11_GETTAB(slot)->C_Logout(slot->session);
crv = PK11_GETTAB(slot)->C_Login(slot->session,CKU_USER,
(unsigned char *)pw,len);
slot->lastLoginCheck = 0;
PK11_ExitSlotMonitor(slot);
switch (crv) {
/* if we're already logged in, we're good to go */
case CKR_OK:
slot->authTransact = PK11_Global.transaction;
slot->authTime = currtime;
rv = SECSuccess;
break;
case CKR_PIN_INCORRECT:
PORT_SetError(SEC_ERROR_BAD_PASSWORD);
rv = SECWouldBlock; /* everything else is ok, only the pin is bad */
break;
default:
PORT_SetError(PK11_MapError(crv));
rv = SECFailure; /* some failure we can't fix by retrying */
}
return rv;
}
SECStatus
PK11_Logout(PK11SlotInfo *slot)
{
CK_RV crv;
/* force a logout */
PK11_EnterSlotMonitor(slot);
crv = PK11_GETTAB(slot)->C_Logout(slot->session);
slot->lastLoginCheck = 0;
PK11_ExitSlotMonitor(slot);
if (crv != CKR_OK) {
PORT_SetError(PK11_MapError(crv));
return SECFailure;
}
return SECSuccess;
}
/*
* transaction stuff is for when we test for the need to do every
* time auth to see if we already did it for this slot/transaction
*/
void PK11_StartAuthTransaction(void)
{
PK11_Global.transaction++;
PK11_Global.inTransaction = PR_TRUE;
}
void PK11_EndAuthTransaction(void)
{
PK11_Global.transaction++;
PK11_Global.inTransaction = PR_FALSE;
}
/*
* before we do a private key op, we check to see if we
* need to reauthenticate.
*/
void
PK11_HandlePasswordCheck(PK11SlotInfo *slot,void *wincx)
{
int askpw = slot->askpw;
PRBool NeedAuth = PR_FALSE;
if (!slot->needLogin) return;
if ((slot->defaultFlags & PK11_OWN_PW_DEFAULTS) == 0) {
PK11SlotInfo *def_slot = PK11_GetInternalKeySlot();
if (def_slot) {
askpw = def_slot->askpw;
PK11_FreeSlot(def_slot);
}
}
/* timeouts are handled by isLoggedIn */
if (!PK11_IsLoggedIn(slot,wincx)) {
NeedAuth = PR_TRUE;
} else if (askpw == -1) {
if (!PK11_Global.inTransaction ||
(PK11_Global.transaction != slot->authTransact)) {
PK11_EnterSlotMonitor(slot);
PK11_GETTAB(slot)->C_Logout(slot->session);
slot->lastLoginCheck = 0;
PK11_ExitSlotMonitor(slot);
NeedAuth = PR_TRUE;
}
}
if (NeedAuth) PK11_DoPassword(slot, slot->session, PR_TRUE,
wincx, PR_FALSE, PR_FALSE);
}
void
PK11_SlotDBUpdate(PK11SlotInfo *slot)
{
SECMOD_UpdateModule(slot->module);
}
/*
* set new askpw and timeout values
*/
void
PK11_SetSlotPWValues(PK11SlotInfo *slot,int askpw, int timeout)
{
slot->askpw = askpw;
slot->timeout = timeout;
slot->defaultFlags |= PK11_OWN_PW_DEFAULTS;
PK11_SlotDBUpdate(slot);
}
/*
* Get the askpw and timeout values for this slot
*/
void
PK11_GetSlotPWValues(PK11SlotInfo *slot,int *askpw, int *timeout)
{
*askpw = slot->askpw;
*timeout = slot->timeout;
if ((slot->defaultFlags & PK11_OWN_PW_DEFAULTS) == 0) {
PK11SlotInfo *def_slot = PK11_GetInternalKeySlot();
if (def_slot) {
*askpw = def_slot->askpw;
*timeout = def_slot->timeout;
PK11_FreeSlot(def_slot);
}
}
}
/*
* Returns true if the token is needLogin and isn't logged in.
* This function is used to determine if authentication is needed
* before attempting a potentially privelleged operation.
*/
PRBool
pk11_LoginStillRequired(PK11SlotInfo *slot, void *wincx)
{
return slot->needLogin && !PK11_IsLoggedIn(slot,wincx);
}
/*
* make sure a slot is authenticated...
* This function only does the authentication if it is needed.
*/
SECStatus
PK11_Authenticate(PK11SlotInfo *slot, PRBool loadCerts, void *wincx) {
if (pk11_LoginStillRequired(slot,wincx)) {
return PK11_DoPassword(slot, slot->session, loadCerts, wincx,
PR_FALSE, PR_FALSE);
}
return SECSuccess;
}
/*
* Authenticate to "unfriendly" tokens (tokens which need to be logged
* in to find the certs.
*/
SECStatus
pk11_AuthenticateUnfriendly(PK11SlotInfo *slot, PRBool loadCerts, void *wincx)
{
SECStatus rv = SECSuccess;
if (!PK11_IsFriendly(slot)) {
rv = PK11_Authenticate(slot, loadCerts, wincx);
}
return rv;
}
/*
* NOTE: this assumes that we are logged out of the card before hand
*/
SECStatus
PK11_CheckSSOPassword(PK11SlotInfo *slot, char *ssopw)
{
CK_SESSION_HANDLE rwsession;
CK_RV crv;
SECStatus rv = SECFailure;
int len = 0;
/* get a rwsession */
rwsession = PK11_GetRWSession(slot);
if (rwsession == CK_INVALID_SESSION) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return rv;
}
if (slot->protectedAuthPath) {
len = 0;
ssopw = NULL;
} else if (ssopw == NULL) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
} else {
len = PORT_Strlen(ssopw);
}
/* check the password */
crv = PK11_GETTAB(slot)->C_Login(rwsession,CKU_SO,
(unsigned char *)ssopw,len);
slot->lastLoginCheck = 0;
switch (crv) {
/* if we're already logged in, we're good to go */
case CKR_OK:
rv = SECSuccess;
break;
case CKR_PIN_INCORRECT:
PORT_SetError(SEC_ERROR_BAD_PASSWORD);
rv = SECWouldBlock; /* everything else is ok, only the pin is bad */
break;
default:
PORT_SetError(PK11_MapError(crv));
rv = SECFailure; /* some failure we can't fix by retrying */
}
PK11_GETTAB(slot)->C_Logout(rwsession);
slot->lastLoginCheck = 0;
/* release rwsession */
PK11_RestoreROSession(slot,rwsession);
return rv;
}
/*
* make sure the password conforms to your token's requirements.
*/
SECStatus
PK11_VerifyPW(PK11SlotInfo *slot,char *pw)
{
int len = PORT_Strlen(pw);
if ((slot->minPassword > len) || (slot->maxPassword < len)) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return SECFailure;
}
return SECSuccess;
}
/*
* initialize a user PIN Value
*/
SECStatus
PK11_InitPin(PK11SlotInfo *slot, const char *ssopw, const char *userpw)
{
CK_SESSION_HANDLE rwsession = CK_INVALID_SESSION;
CK_RV crv;
SECStatus rv = SECFailure;
int len;
int ssolen;
if (userpw == NULL) userpw = "";
if (ssopw == NULL) ssopw = "";
len = PORT_Strlen(userpw);
ssolen = PORT_Strlen(ssopw);
/* get a rwsession */
rwsession = PK11_GetRWSession(slot);
if (rwsession == CK_INVALID_SESSION) {
PORT_SetError(SEC_ERROR_BAD_DATA);
slot->lastLoginCheck = 0;
return rv;
}
if (slot->protectedAuthPath) {
len = 0;
ssolen = 0;
ssopw = NULL;
userpw = NULL;
}
/* check the password */
crv = PK11_GETTAB(slot)->C_Login(rwsession,CKU_SO,
(unsigned char *)ssopw,ssolen);
slot->lastLoginCheck = 0;
if (crv != CKR_OK) {
PORT_SetError(PK11_MapError(crv));
goto done;
}
crv = PK11_GETTAB(slot)->C_InitPIN(rwsession,(unsigned char *)userpw,len);
if (crv != CKR_OK) {
PORT_SetError(PK11_MapError(crv));
} else {
rv = SECSuccess;
}
done:
PK11_GETTAB(slot)->C_Logout(rwsession);
slot->lastLoginCheck = 0;
PK11_RestoreROSession(slot,rwsession);
if (rv == SECSuccess) {
/* update our view of the world */
PK11_InitToken(slot,PR_TRUE);
if (slot->needLogin) {
PK11_EnterSlotMonitor(slot);
PK11_GETTAB(slot)->C_Login(slot->session,CKU_USER,
(unsigned char *)userpw,len);
slot->lastLoginCheck = 0;
PK11_ExitSlotMonitor(slot);
}
}
return rv;
}
/*
* Change an existing user password
*/
SECStatus
PK11_ChangePW(PK11SlotInfo *slot, const char *oldpw, const char *newpw)
{
CK_RV crv;
SECStatus rv = SECFailure;
int newLen = 0;
int oldLen = 0;
CK_SESSION_HANDLE rwsession;
/* use NULL values to trigger the protected authentication path */
if (!slot->protectedAuthPath) {
if (newpw == NULL) newpw = "";
if (oldpw == NULL) oldpw = "";
}
if (newpw) newLen = PORT_Strlen(newpw);
if (oldpw) oldLen = PORT_Strlen(oldpw);
/* get a rwsession */
rwsession = PK11_GetRWSession(slot);
if (rwsession == CK_INVALID_SESSION) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return rv;
}
crv = PK11_GETTAB(slot)->C_SetPIN(rwsession,
(unsigned char *)oldpw,oldLen,(unsigned char *)newpw,newLen);
if (crv == CKR_OK) {
rv = SECSuccess;
} else {
PORT_SetError(PK11_MapError(crv));
}
PK11_RestoreROSession(slot,rwsession);
/* update our view of the world */
PK11_InitToken(slot,PR_TRUE);
return rv;
}
static char *
pk11_GetPassword(PK11SlotInfo *slot, PRBool retry, void * wincx)
{
if (PK11_Global.getPass == NULL) return NULL;
return (*PK11_Global.getPass)(slot, retry, wincx);
}
void
PK11_SetPasswordFunc(PK11PasswordFunc func)
{
PK11_Global.getPass = func;
}
void
PK11_SetVerifyPasswordFunc(PK11VerifyPasswordFunc func)
{
PK11_Global.verifyPass = func;
}
void
PK11_SetIsLoggedInFunc(PK11IsLoggedInFunc func)
{
PK11_Global.isLoggedIn = func;
}
/*
* authenticate to a slot. This loops until we can't recover, the user
* gives up, or we succeed. If we're already logged in and this function
* is called we will still prompt for a password, but we will probably
* succeed no matter what the password was (depending on the implementation
* of the PKCS 11 module.
*/
SECStatus
PK11_DoPassword(PK11SlotInfo *slot, CK_SESSION_HANDLE session,
PRBool loadCerts, void *wincx, PRBool alreadyLocked,
PRBool contextSpecific)
{
SECStatus rv = SECFailure;
char * password;
PRBool attempt = PR_FALSE;
if (PK11_NeedUserInit(slot)) {
PORT_SetError(SEC_ERROR_IO);
return SECFailure;
}
/*
* Central server type applications which control access to multiple
* slave applications to single crypto devices need to virtuallize the
* login state. This is done by a callback out of PK11_IsLoggedIn and
* here. If we are actually logged in, then we got here because the
* higher level code told us that the particular client application may
* still need to be logged in. If that is the case, we simply tell the
* server code that it should now verify the clients password and tell us
* the results.
*/
if (PK11_IsLoggedIn(slot,NULL) &&
(PK11_Global.verifyPass != NULL)) {
if (!PK11_Global.verifyPass(slot,wincx)) {
PORT_SetError(SEC_ERROR_BAD_PASSWORD);
return SECFailure;
}
return SECSuccess;
}
/* get the password. This can drop out of the while loop
* for the following reasons:
* (1) the user refused to enter a password.
* (return error to caller)
* (2) the token user password is disabled [usually due to
* too many failed authentication attempts].
* (return error to caller)
* (3) the password was successful.
*/
while ((password = pk11_GetPassword(slot, attempt, wincx)) != NULL) {
/* if the token has a protectedAuthPath, the application may have
* already issued the C_Login as part of it's pk11_GetPassword call.
* In this case the application will tell us what the results were in
* the password value (retry or the authentication was successful) so
* we can skip our own C_Login call (which would force the token to
* try to login again).
*
* Applications that don't know about protectedAuthPath will return a
* password, which we will ignore and trigger the token to
* 'authenticate' itself anyway. Hopefully the blinking display on
* the reader, or the flashing light under the thumbprint reader will
* attract the user's attention */
attempt = PR_TRUE;
if (slot->protectedAuthPath) {
/* application tried to authenticate and failed. it wants to try
* again, continue looping */
if (strcmp(password, PK11_PW_RETRY) == 0) {
rv = SECWouldBlock;
PORT_Free(password);
continue;
}
/* applicaton tried to authenticate and succeeded we're done */
if (strcmp(password, PK11_PW_AUTHENTICATED) == 0) {
rv = SECSuccess;
PORT_Free(password);
break;
}
}
rv = pk11_CheckPassword(slot, session, password,
alreadyLocked, contextSpecific);
PORT_Memset(password, 0, PORT_Strlen(password));
PORT_Free(password);
if (rv != SECWouldBlock) break;
}
if (rv == SECSuccess) {
if (!PK11_IsFriendly(slot)) {
nssTrustDomain_UpdateCachedTokenCerts(slot->nssToken->trustDomain,
slot->nssToken);
}
} else if (!attempt) PORT_SetError(SEC_ERROR_BAD_PASSWORD);
return rv;
}
void PK11_LogoutAll(void)
{
SECMODListLock *lock = SECMOD_GetDefaultModuleListLock();
SECMODModuleList *modList;
SECMODModuleList *mlp = NULL;
int i;
/* NSS is not initialized, there are not tokens to log out */
if (lock == NULL) {
return;
}
SECMOD_GetReadLock(lock);
modList = SECMOD_GetDefaultModuleList();
/* find the number of entries */
for (mlp = modList; mlp != NULL; mlp = mlp->next) {
for (i=0; i < mlp->module->slotCount; i++) {
PK11_Logout(mlp->module->slots[i]);
}
}
SECMOD_ReleaseReadLock(lock);
}
int
PK11_GetMinimumPwdLength(PK11SlotInfo *slot)
{
return ((int)slot->minPassword);
}
/* Does this slot have a protected pin path? */
PRBool
PK11_ProtectedAuthenticationPath(PK11SlotInfo *slot)
{
return slot->protectedAuthPath;
}
/*
* we can initialize the password if 1) The toke is not inited
* (need login == true and see need UserInit) or 2) the token has
* a NULL password. (slot->needLogin = false & need user Init = false).
*/
PRBool PK11_NeedPWInitForSlot(PK11SlotInfo *slot)
{
if (slot->needLogin && PK11_NeedUserInit(slot)) {
return PR_TRUE;
}
if (!slot->needLogin && !PK11_NeedUserInit(slot)) {
return PR_TRUE;
}
return PR_FALSE;
}
PRBool PK11_NeedPWInit()
{
PK11SlotInfo *slot = PK11_GetInternalKeySlot();
PRBool ret = PK11_NeedPWInitForSlot(slot);
PK11_FreeSlot(slot);
return ret;
}
PRBool
pk11_InDelayPeriod(PRIntervalTime lastTime, PRIntervalTime delayTime,
PRIntervalTime *retTime)
{
PRIntervalTime time;
*retTime = time = PR_IntervalNow();
return (PRBool) (lastTime) && ((time-lastTime) < delayTime);
}
/*
* Determine if the token is logged in. We have to actually query the token,
* because it's state can change without intervention from us.
*/
PRBool
PK11_IsLoggedIn(PK11SlotInfo *slot,void *wincx)
{
CK_SESSION_INFO sessionInfo;
int askpw = slot->askpw;
int timeout = slot->timeout;
CK_RV crv;
PRIntervalTime curTime;
static PRIntervalTime login_delay_time = 0;
if (login_delay_time == 0) {
login_delay_time = PR_SecondsToInterval(1);
}
/* If we don't have our own password default values, use the system
* ones */
if ((slot->defaultFlags & PK11_OWN_PW_DEFAULTS) == 0) {
PK11SlotInfo *def_slot = PK11_GetInternalKeySlot();
if (def_slot) {
askpw = def_slot->askpw;
timeout = def_slot->timeout;
PK11_FreeSlot(def_slot);
}
}
if ((wincx != NULL) && (PK11_Global.isLoggedIn != NULL) &&
(*PK11_Global.isLoggedIn)(slot, wincx) == PR_FALSE) { return PR_FALSE; }
/* forget the password if we've been inactive too long */
if (askpw == 1) {
PRTime currtime = PR_Now();
PRTime result;
PRTime mult;
LL_I2L(result, timeout);
LL_I2L(mult, 60*1000*1000);
LL_MUL(result,result,mult);
LL_ADD(result, result, slot->authTime);
if (LL_CMP(result, <, currtime) ) {
PK11_EnterSlotMonitor(slot);
PK11_GETTAB(slot)->C_Logout(slot->session);
slot->lastLoginCheck = 0;
PK11_ExitSlotMonitor(slot);
} else {
slot->authTime = currtime;
}
}
PK11_EnterSlotMonitor(slot);
if (pk11_InDelayPeriod(slot->lastLoginCheck,login_delay_time, &curTime)) {
sessionInfo.state = slot->lastState;
crv = CKR_OK;
} else {
crv = PK11_GETTAB(slot)->C_GetSessionInfo(slot->session,&sessionInfo);
if (crv == CKR_OK) {
slot->lastState = sessionInfo.state;
slot->lastLoginCheck = curTime;
}
}
PK11_ExitSlotMonitor(slot);
/* if we can't get session info, something is really wrong */
if (crv != CKR_OK) {
slot->session = CK_INVALID_SESSION;
return PR_FALSE;
}
switch (sessionInfo.state) {
case CKS_RW_PUBLIC_SESSION:
case CKS_RO_PUBLIC_SESSION:
default:
break; /* fail */
case CKS_RW_USER_FUNCTIONS:
case CKS_RW_SO_FUNCTIONS:
case CKS_RO_USER_FUNCTIONS:
return PR_TRUE;
}
return PR_FALSE;
}