crmfdec.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:10k
- /* -*- Mode: C; tab-width: 8 -*-*/
- /*
- * 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 "crmf.h"
- #include "crmfi.h"
- #include "secitem.h"
- static CRMFPOPChoice
- crmf_get_popchoice_from_der(SECItem *derPOP)
- {
- CRMFPOPChoice retChoice;
- switch (derPOP->data[0] & 0x0f) {
- case 0:
- retChoice = crmfRAVerified;
- break;
- case 1:
- retChoice = crmfSignature;
- break;
- case 2:
- retChoice = crmfKeyEncipherment;
- break;
- case 3:
- retChoice = crmfKeyAgreement;
- break;
- default:
- retChoice = crmfNoPOPChoice;
- break;
- }
- return retChoice;
- }
- static SECStatus
- crmf_decode_process_raverified(CRMFCertReqMsg *inCertReqMsg)
- {
- CRMFProofOfPossession *pop;
- /* Just set up the structure so that the message structure
- * looks like one that was created using the API
- */
- pop = inCertReqMsg->pop;
- pop->popChoice.raVerified.data = NULL;
- pop->popChoice.raVerified.len = 0;
- return SECSuccess;
- }
- static SECStatus
- crmf_decode_process_signature(CRMFCertReqMsg *inCertReqMsg)
- {
- return SEC_ASN1Decode(inCertReqMsg->poolp,
- &inCertReqMsg->pop->popChoice.signature,
- CRMFPOPOSigningKeyTemplate,
- (const char*)inCertReqMsg->derPOP.data,
- inCertReqMsg->derPOP.len);
- }
- static CRMFPOPOPrivKeyChoice
- crmf_get_messagechoice_from_der(SECItem *derPOP)
- {
- CRMFPOPOPrivKeyChoice retChoice;
- switch (derPOP->data[2] & 0x0f) {
- case 0:
- retChoice = crmfThisMessage;
- break;
- case 1:
- retChoice = crmfSubsequentMessage;
- break;
- case 2:
- retChoice = crmfDHMAC;
- break;
- default:
- retChoice = crmfNoMessage;
- }
- return retChoice;
- }
- static SECStatus
- crmf_decode_process_popoprivkey(CRMFCertReqMsg *inCertReqMsg)
- {
- /* We've got a union, so a pointer to one POPOPrivKey
- * struct is the same as having a pointer to the other
- * one.
- */
- CRMFPOPOPrivKey *popoPrivKey =
- &inCertReqMsg->pop->popChoice.keyEncipherment;
- SECItem *derPOP, privKeyDer;
- SECStatus rv;
- derPOP = &inCertReqMsg->derPOP;
- popoPrivKey->messageChoice = crmf_get_messagechoice_from_der(derPOP);
- if (popoPrivKey->messageChoice == crmfNoMessage) {
- return SECFailure;
- }
- /* If we ever encounter BER encodings of this, we'll get in trouble*/
- switch (popoPrivKey->messageChoice) {
- case crmfThisMessage:
- case crmfDHMAC:
- privKeyDer.data = &derPOP->data[5];
- privKeyDer.len = derPOP->len - 5;
- break;
- case crmfSubsequentMessage:
- privKeyDer.data = &derPOP->data[4];
- privKeyDer.len = derPOP->len - 4;
- break;
- default:
- rv = SECFailure;
- }
- rv = SECITEM_CopyItem(inCertReqMsg->poolp,
- &popoPrivKey->message.subsequentMessage,
- &privKeyDer);
- if (rv != SECSuccess) {
- return rv;
- }
- if (popoPrivKey->messageChoice == crmfThisMessage ||
- popoPrivKey->messageChoice == crmfDHMAC) {
- popoPrivKey->message.thisMessage.len =
- CRMF_BYTES_TO_BITS(privKeyDer.len) - (int)derPOP->data[4];
-
- }
- return SECSuccess;
- }
- static SECStatus
- crmf_decode_process_keyagreement(CRMFCertReqMsg *inCertReqMsg)
- {
- return crmf_decode_process_popoprivkey(inCertReqMsg);
- }
- static SECStatus
- crmf_decode_process_keyencipherment(CRMFCertReqMsg *inCertReqMsg)
- {
- SECStatus rv;
- rv = crmf_decode_process_popoprivkey(inCertReqMsg);
- if (rv != SECSuccess) {
- return rv;
- }
- if (inCertReqMsg->pop->popChoice.keyEncipherment.messageChoice ==
- crmfDHMAC) {
- /* Key Encipherment can not use the dhMAC option for
- * POPOPrivKey.
- */
- return SECFailure;
- }
- return SECSuccess;
- }
- static SECStatus
- crmf_decode_process_pop(CRMFCertReqMsg *inCertReqMsg)
- {
- SECItem *derPOP;
- PRArenaPool *poolp;
- CRMFProofOfPossession *pop;
- void *mark;
- SECStatus rv;
- derPOP = &inCertReqMsg->derPOP;
- poolp = inCertReqMsg->poolp;
- if (derPOP->data == NULL) {
- /* There is no Proof of Possession field in this message. */
- return SECSuccess;
- }
- mark = PORT_ArenaMark(poolp);
- pop = PORT_ArenaZNew(poolp, CRMFProofOfPossession);
- if (pop == NULL) {
- goto loser;
- }
- pop->popUsed = crmf_get_popchoice_from_der(derPOP);
- if (pop->popUsed == crmfNoPOPChoice) {
- /* A bad encoding of CRMF. Not a valid tag was given to the
- * Proof Of Possession field.
- */
- goto loser;
- }
- inCertReqMsg->pop = pop;
- switch (pop->popUsed) {
- case crmfRAVerified:
- rv = crmf_decode_process_raverified(inCertReqMsg);
- break;
- case crmfSignature:
- rv = crmf_decode_process_signature(inCertReqMsg);
- break;
- case crmfKeyEncipherment:
- rv = crmf_decode_process_keyencipherment(inCertReqMsg);
- break;
- case crmfKeyAgreement:
- rv = crmf_decode_process_keyagreement(inCertReqMsg);
- break;
- default:
- rv = SECFailure;
- }
- if (rv != SECSuccess) {
- goto loser;
- }
- PORT_ArenaUnmark(poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease(poolp, mark);
- inCertReqMsg->pop = NULL;
- return SECFailure;
-
- }
- static SECStatus
- crmf_decode_process_single_control(PRArenaPool *poolp,
- CRMFControl *inControl)
- {
- const SEC_ASN1Template *asn1Template = NULL;
- inControl->tag = SECOID_FindOIDTag(&inControl->derTag);
- asn1Template = crmf_get_pkiarchiveoptions_subtemplate(inControl);
- PORT_Assert (asn1Template != NULL);
- /* We've got a union, so passing a pointer to one element of the
- * union is the same as passing a pointer to any of the other
- * members of the union.
- */
- return SEC_ASN1Decode(poolp, &inControl->value.archiveOptions,
- asn1Template, (const char*)inControl->derValue.data,
- inControl->derValue.len);
- }
- static SECStatus
- crmf_decode_process_controls(CRMFCertReqMsg *inCertReqMsg)
- {
- int i, numControls;
- SECStatus rv;
- PRArenaPool *poolp;
- CRMFControl **controls;
-
- numControls = CRMF_CertRequestGetNumControls(inCertReqMsg->certReq);
- controls = inCertReqMsg->certReq->controls;
- poolp = inCertReqMsg->poolp;
- for (i=0; i < numControls; i++) {
- rv = crmf_decode_process_single_control(poolp, controls[i]);
- if (rv != SECSuccess) {
- return SECFailure;
- }
- }
- return SECSuccess;
- }
- static SECStatus
- crmf_decode_process_single_reqmsg(CRMFCertReqMsg *inCertReqMsg)
- {
- SECStatus rv;
- rv = crmf_decode_process_pop(inCertReqMsg);
- if (rv != SECSuccess) {
- goto loser;
- }
- rv = crmf_decode_process_controls(inCertReqMsg);
- if (rv != SECSuccess) {
- goto loser;
- }
- inCertReqMsg->certReq->certTemplate.numExtensions =
- CRMF_CertRequestGetNumberOfExtensions(inCertReqMsg->certReq);
- inCertReqMsg->isDecoded = PR_TRUE;
- rv = SECSuccess;
- loser:
- return rv;
- }
- CRMFCertReqMsg*
- CRMF_CreateCertReqMsgFromDER (const char * buf, long len)
- {
- PRArenaPool *poolp;
- CRMFCertReqMsg *certReqMsg;
- SECStatus rv;
- poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
- if (poolp == NULL) {
- goto loser;
- }
- certReqMsg = PORT_ArenaZNew (poolp, CRMFCertReqMsg);
- if (certReqMsg == NULL) {
- goto loser;
- }
- certReqMsg->poolp = poolp;
- rv = SEC_ASN1Decode(poolp, certReqMsg, CRMFCertReqMsgTemplate, buf, len);
- if (rv != SECSuccess) {
- goto loser;
- }
- rv = crmf_decode_process_single_reqmsg(certReqMsg);
- if (rv != SECSuccess) {
- goto loser;
- }
- return certReqMsg;
- loser:
- if (poolp != NULL) {
- PORT_FreeArena(poolp, PR_FALSE);
- }
- return NULL;
- }
- CRMFCertReqMessages*
- CRMF_CreateCertReqMessagesFromDER(const char *buf, long len)
- {
- long arenaSize;
- int i;
- SECStatus rv;
- PRArenaPool *poolp;
- CRMFCertReqMessages *certReqMsgs;
- PORT_Assert (buf != NULL);
- /* Wanna make sure the arena is big enough to store all of the requests
- * coming in. We'll guestimate according to the length of the buffer.
- */
- arenaSize = len * 1.5;
- poolp = PORT_NewArena(arenaSize);
- if (poolp == NULL) {
- return NULL;
- }
- certReqMsgs = PORT_ArenaZNew(poolp, CRMFCertReqMessages);
- if (certReqMsgs == NULL) {
- goto loser;
- }
- certReqMsgs->poolp = poolp;
- rv = SEC_ASN1Decode(poolp, certReqMsgs, CRMFCertReqMessagesTemplate,
- buf, len);
- if (rv != SECSuccess) {
- goto loser;
- }
- for (i=0; certReqMsgs->messages[i] != NULL; i++) {
- /* The sub-routines expect the individual messages to have
- * an arena. We'll give them one temporarily.
- */
- certReqMsgs->messages[i]->poolp = poolp;
- rv = crmf_decode_process_single_reqmsg(certReqMsgs->messages[i]);
- if (rv != SECSuccess) {
- goto loser;
- }
- certReqMsgs->messages[i]->poolp = NULL;
- }
- return certReqMsgs;
- loser:
- PORT_FreeArena(poolp, PR_FALSE);
- return NULL;
- }