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286 lines
8.6 KiB
C
286 lines
8.6 KiB
C
/* -*- Mode: C; tab-width: 8 -*-*/
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1994-2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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#include "cmmf.h"
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#include "cmmfi.h"
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#include "secitem.h"
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#include "pk11func.h"
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#include "secder.h"
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CMMFPOPODecKeyChallContent*
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CMMF_CreatePOPODecKeyChallContentFromDER(const char *buf, long len)
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{
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PRArenaPool *poolp;
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CMMFPOPODecKeyChallContent *challContent;
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SECStatus rv;
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poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
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if (poolp == NULL) {
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return NULL;
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}
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challContent = PORT_ArenaZNew(poolp, CMMFPOPODecKeyChallContent);
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if (challContent == NULL) {
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goto loser;
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}
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challContent->poolp = poolp;
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rv = SEC_ASN1Decode(poolp, challContent,
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CMMFPOPODecKeyChallContentTemplate, buf, len);
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if (rv != SECSuccess) {
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goto loser;
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}
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if (challContent->challenges) {
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while (challContent->challenges[challContent->numChallenges] != NULL) {
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challContent->numChallenges++;
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}
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challContent->numAllocated = challContent->numChallenges;
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}
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return challContent;
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loser:
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if (poolp != NULL) {
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PORT_FreeArena(poolp, PR_FALSE);
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}
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return NULL;
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}
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int
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CMMF_POPODecKeyChallContentGetNumChallenges
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(CMMFPOPODecKeyChallContent *inKeyChallCont)
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{
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PORT_Assert(inKeyChallCont != NULL);
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if (inKeyChallCont == NULL) {
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return 0;
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}
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return inKeyChallCont->numChallenges;
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}
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SECItem*
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CMMF_POPODecKeyChallContentGetPublicValue
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(CMMFPOPODecKeyChallContent *inKeyChallCont,
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int inIndex)
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{
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PORT_Assert(inKeyChallCont != NULL);
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if (inKeyChallCont == NULL || (inIndex > inKeyChallCont->numChallenges-1)||
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inIndex < 0) {
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return NULL;
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}
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return SECITEM_DupItem(&inKeyChallCont->challenges[inIndex]->key);
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}
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static SECAlgorithmID*
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cmmf_get_owf(CMMFPOPODecKeyChallContent *inChalCont,
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int inIndex)
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{
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int i;
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for (i=inIndex; i >= 0; i--) {
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if (inChalCont->challenges[i]->owf != NULL) {
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return inChalCont->challenges[i]->owf;
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}
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}
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return NULL;
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}
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SECStatus
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CMMF_POPODecKeyChallContDecryptChallenge(CMMFPOPODecKeyChallContent *inChalCont,
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int inIndex,
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SECKEYPrivateKey *inPrivKey)
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{
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CMMFChallenge *challenge;
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SECItem *decryptedRand=NULL;
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SECStatus rv = SECFailure;
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PK11SlotInfo *slot;
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PK11SymKey *symKey = NULL;
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CMMFRand randStr;
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SECAlgorithmID *owf;
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unsigned char hash[SHA1_LENGTH]; /*SHA1 is the longest, so we'll use
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*it's length.
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*/
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SECItem hashItem;
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SECOidTag tag;
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PORT_Assert(inChalCont != NULL && inPrivKey != NULL);
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if (inChalCont == NULL || inIndex <0 || inIndex > inChalCont->numChallenges
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|| inPrivKey == NULL){
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return SECFailure;
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}
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challenge = inChalCont->challenges[inIndex];
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decryptedRand = PORT_ZNew(SECItem);
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if (decryptedRand == NULL) {
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goto loser;
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}
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decryptedRand->data =
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PORT_NewArray(unsigned char, challenge->challenge.len);
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if (decryptedRand->data == NULL) {
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goto loser;
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}
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slot = inPrivKey->pkcs11Slot;
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symKey = PK11_PubUnwrapSymKey(inPrivKey, &challenge->challenge,
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CKM_RSA_PKCS, CKA_VALUE, 0);
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if (symKey == NULL) {
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rv = SECFailure;
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goto loser;
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}
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rv = PK11_ExtractKeyValue(symKey);
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if (rv != SECSuccess) {
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goto loser;
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}
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decryptedRand = PK11_GetKeyData(symKey);
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rv = SEC_ASN1DecodeItem(NULL, &randStr, CMMFRandTemplate,
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decryptedRand);
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/* The decryptedRand returned points to a member within the symKey structure,
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* so we don't want to free it. Let the symKey destruction function deal with
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* freeing that memory.
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*/
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if (rv != SECSuccess) {
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goto loser;
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}
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rv = SECFailure; /* Just so that when we do go to loser,
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* I won't have to set it again.
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*/
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owf = cmmf_get_owf(inChalCont, inIndex);
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if (owf == NULL) {
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/* No hashing algorithm came with the challenges. Can't verify */
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goto loser;
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}
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/* Verify the hashes in the challenge */
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tag = SECOID_FindOIDTag(&owf->algorithm);
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switch (tag) {
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case SEC_OID_MD2:
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hashItem.len = MD2_LENGTH;
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break;
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case SEC_OID_MD5:
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hashItem.len = MD5_LENGTH;
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break;
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case SEC_OID_SHA1:
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hashItem.len = SHA1_LENGTH;
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break;
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default:
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goto loser;
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}
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rv = PK11_HashBuf(tag, hash, randStr.integer.data, randStr.integer.len);
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if (rv != SECSuccess) {
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goto loser;
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}
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hashItem.data = hash;
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if (SECITEM_CompareItem(&hashItem, &challenge->witness) != SECEqual) {
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/* The hash for the data we decrypted doesn't match the hash provided
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* in the challenge. Bail out.
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*/
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rv = SECFailure;
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goto loser;
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}
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rv = PK11_HashBuf(tag, hash, challenge->senderDER.data,
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challenge->senderDER.len);
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if (rv != SECSuccess) {
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goto loser;
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}
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if (SECITEM_CompareItem(&hashItem, &randStr.senderHash) != SECEqual) {
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/* The hash for the data we decrypted doesn't match the hash provided
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* in the challenge. Bail out.
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*/
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rv = SECFailure;
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goto loser;
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}
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/* All of the hashes have verified, so we can now store the integer away.*/
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rv = SECITEM_CopyItem(inChalCont->poolp, &challenge->randomNumber,
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&randStr.integer);
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loser:
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if (symKey != NULL) {
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PK11_FreeSymKey(symKey);
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}
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return rv;
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}
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SECStatus
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CMMF_POPODecKeyChallContentGetRandomNumber
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(CMMFPOPODecKeyChallContent *inKeyChallCont,
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int inIndex,
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long *inDest)
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{
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CMMFChallenge *challenge;
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PORT_Assert(inKeyChallCont != NULL);
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if (inKeyChallCont == NULL || inIndex > 0 || inIndex >=
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inKeyChallCont->numChallenges) {
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return SECFailure;
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}
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challenge = inKeyChallCont->challenges[inIndex];
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if (challenge->randomNumber.data == NULL) {
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/* There is no random number here, nothing to see. */
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return SECFailure;
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}
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*inDest = DER_GetInteger(&challenge->randomNumber);
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return (*inDest == -1) ? SECFailure : SECSuccess;
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}
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SECStatus
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CMMF_EncodePOPODecKeyRespContent(long *inDecodedRand,
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int inNumRand,
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CRMFEncoderOutputCallback inCallback,
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void *inArg)
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{
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PRArenaPool *poolp;
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CMMFPOPODecKeyRespContent *response;
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SECItem *currItem;
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SECStatus rv=SECFailure;
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int i;
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poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
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if (poolp == NULL) {
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return SECFailure;
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}
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response = PORT_ArenaZNew(poolp, CMMFPOPODecKeyRespContent);
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if (response == NULL) {
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goto loser;
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}
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response->responses = PORT_ArenaZNewArray(poolp, SECItem*, inNumRand+1);
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if (response->responses == NULL) {
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goto loser;
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}
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for (i=0; i<inNumRand; i++) {
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currItem = response->responses[i] = PORT_ArenaZNew(poolp,SECItem);
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if (currItem == NULL) {
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goto loser;
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}
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SEC_ASN1EncodeInteger(poolp, currItem,inDecodedRand[i]);
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}
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rv = cmmf_user_encode(response, inCallback, inArg,
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CMMFPOPODecKeyRespContentTemplate);
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loser:
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if (poolp != NULL) {
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PORT_FreeArena(poolp, PR_FALSE);
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}
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return rv;
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}
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