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/*
* 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 "p12plcy.h"
#include "secoid.h"
#include "secport.h"
#include "secpkcs5.h"
#define PKCS12_NULL 0x0000
typedef struct pkcs12SuiteMapStr {
SECOidTag algTag;
unsigned int keyLengthBits; /* in bits */
unsigned long suite;
PRBool allowed;
PRBool preferred;
} pkcs12SuiteMap;
static pkcs12SuiteMap pkcs12SuiteMaps[] = {
{ SEC_OID_RC4, 40, PKCS12_RC4_40, PR_FALSE, PR_FALSE},
{ SEC_OID_RC4, 128, PKCS12_RC4_128, PR_FALSE, PR_FALSE},
{ SEC_OID_RC2_CBC, 40, PKCS12_RC2_CBC_40, PR_FALSE, PR_TRUE},
{ SEC_OID_RC2_CBC, 128, PKCS12_RC2_CBC_128, PR_FALSE, PR_FALSE},
{ SEC_OID_DES_CBC, 64, PKCS12_DES_56, PR_FALSE, PR_FALSE},
{ SEC_OID_DES_EDE3_CBC, 192, PKCS12_DES_EDE3_168, PR_FALSE, PR_FALSE},
{ SEC_OID_UNKNOWN, 0, PKCS12_NULL, PR_FALSE, PR_FALSE},
{ SEC_OID_UNKNOWN, 0, 0L, PR_FALSE, PR_FALSE}
};
/* determine if algid is an algorithm which is allowed */
PRBool
SEC_PKCS12DecryptionAllowed(SECAlgorithmID *algid)
{
unsigned int keyLengthBits;
SECOidTag algId;
int i;
algId = SEC_PKCS5GetCryptoAlgorithm(algid);
if(algId == SEC_OID_UNKNOWN) {
return PR_FALSE;
}
keyLengthBits = (unsigned int)(SEC_PKCS5GetKeyLength(algid) * 8);
i = 0;
while(pkcs12SuiteMaps[i].algTag != SEC_OID_UNKNOWN) {
if((pkcs12SuiteMaps[i].algTag == algId) &&
(pkcs12SuiteMaps[i].keyLengthBits == keyLengthBits)) {
return pkcs12SuiteMaps[i].allowed;
}
i++;
}
return PR_FALSE;
}
/* is any encryption allowed? */
PRBool
SEC_PKCS12IsEncryptionAllowed(void)
{
int i;
i = 0;
while(pkcs12SuiteMaps[i].algTag != SEC_OID_UNKNOWN) {
if(pkcs12SuiteMaps[i].allowed == PR_TRUE) {
return PR_TRUE;
}
i++;
}
return PR_FALSE;
}
/* get the preferred algorithm.
*/
SECOidTag
SEC_PKCS12GetPreferredEncryptionAlgorithm(void)
{
int i;
i = 0;
while(pkcs12SuiteMaps[i].algTag != SEC_OID_UNKNOWN) {
if((pkcs12SuiteMaps[i].preferred == PR_TRUE) &&
(pkcs12SuiteMaps[i].allowed == PR_TRUE)) {
return SEC_PKCS5GetPBEAlgorithm(pkcs12SuiteMaps[i].algTag,
pkcs12SuiteMaps[i].keyLengthBits);
}
i++;
}
return SEC_OID_UNKNOWN;
}
/* return the strongest algorithm allowed */
SECOidTag
SEC_PKCS12GetStrongestAllowedAlgorithm(void)
{
int i, keyLengthBits = 0;
SECOidTag algorithm = SEC_OID_UNKNOWN;
i = 0;
while(pkcs12SuiteMaps[i].algTag != SEC_OID_UNKNOWN) {
if((pkcs12SuiteMaps[i].allowed == PR_TRUE) &&
(pkcs12SuiteMaps[i].keyLengthBits > (unsigned int)keyLengthBits) &&
(pkcs12SuiteMaps[i].algTag != SEC_OID_RC4)) {
algorithm = pkcs12SuiteMaps[i].algTag;
keyLengthBits = pkcs12SuiteMaps[i].keyLengthBits;
}
i++;
}
if(algorithm == SEC_OID_UNKNOWN) {
return SEC_OID_UNKNOWN;
}
return SEC_PKCS5GetPBEAlgorithm(algorithm, keyLengthBits);
}
SECStatus
SEC_PKCS12EnableCipher(long which, int on)
{
int i;
i = 0;
while(pkcs12SuiteMaps[i].suite != 0L) {
if(pkcs12SuiteMaps[i].suite == (unsigned long)which) {
if(on) {
pkcs12SuiteMaps[i].allowed = PR_TRUE;
} else {
pkcs12SuiteMaps[i].allowed = PR_FALSE;
}
return SECSuccess;
}
i++;
}
return SECFailure;
}
SECStatus
SEC_PKCS12SetPreferredCipher(long which, int on)
{
int i;
PRBool turnedOff = PR_FALSE;
PRBool turnedOn = PR_FALSE;
i = 0;
while(pkcs12SuiteMaps[i].suite != 0L) {
if(pkcs12SuiteMaps[i].preferred == PR_TRUE) {
pkcs12SuiteMaps[i].preferred = PR_FALSE;
turnedOff = PR_TRUE;
}
if(pkcs12SuiteMaps[i].suite == (unsigned long)which) {
pkcs12SuiteMaps[i].preferred = PR_TRUE;
turnedOn = PR_TRUE;
}
i++;
}
if((turnedOn) && (turnedOff)) {
return SECSuccess;
}
return SECFailure;
}
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