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/* -*- Mode: C; tab-width: 8 -*-*/
/* 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
#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)
{
PORT_Assert(inCertReqMsg->poolp);
if (!inCertReqMsg->poolp) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
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.type = derPOP->type;
privKeyDer.data = &derPOP->data[5];
privKeyDer.len = derPOP->len - 5;
break;
case crmfSubsequentMessage:
privKeyDer.type = derPOP->type;
privKeyDer.data = &derPOP->data[4];
privKeyDer.len = derPOP->len - 4;
break;
default:
return 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;
PLArenaPool *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(PLArenaPool *poolp,
CRMFControl *inControl)
{
const SEC_ASN1Template *asn1Template = NULL;
inControl->tag = SECOID_FindOIDTag(&inControl->derTag);
asn1Template = crmf_get_pkiarchiveoptions_subtemplate(inControl);
PORT_Assert(asn1Template != NULL);
PORT_Assert(poolp != NULL);
if (!asn1Template || !poolp) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
/* 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;
PLArenaPool *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)
{
PLArenaPool *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;
PLArenaPool *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 + len / 2;
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;
}