/* -*- 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
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * This file will implement the functions related to key recovery in
 * CMMF
 */

#include "cmmf.h"
#include "cmmfi.h"
#include "secitem.h"
#include "keyhi.h"

CMMFKeyRecRepContent *
CMMF_CreateKeyRecRepContent(void)
{
    PLArenaPool *poolp;
    CMMFKeyRecRepContent *keyRecContent;

    poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
    if (poolp == NULL) {
        return NULL;
    }
    keyRecContent = PORT_ArenaZNew(poolp, CMMFKeyRecRepContent);
    if (keyRecContent == NULL) {
        PORT_FreeArena(poolp, PR_FALSE);
        return NULL;
    }
    keyRecContent->poolp = poolp;
    return keyRecContent;
}

SECStatus
CMMF_DestroyKeyRecRepContent(CMMFKeyRecRepContent *inKeyRecRep)
{
    PORT_Assert(inKeyRecRep != NULL);
    if (inKeyRecRep != NULL && inKeyRecRep->poolp != NULL) {
        int i;

        if (!inKeyRecRep->isDecoded && inKeyRecRep->newSigCert != NULL) {
            CERT_DestroyCertificate(inKeyRecRep->newSigCert);
        }
        if (inKeyRecRep->caCerts != NULL) {
            for (i = 0; inKeyRecRep->caCerts[i] != NULL; i++) {
                CERT_DestroyCertificate(inKeyRecRep->caCerts[i]);
            }
        }
        if (inKeyRecRep->keyPairHist != NULL) {
            for (i = 0; inKeyRecRep->keyPairHist[i] != NULL; i++) {
                if (inKeyRecRep->keyPairHist[i]->certOrEncCert.choice ==
                    cmmfCertificate) {
                    CERT_DestroyCertificate(inKeyRecRep->keyPairHist[i]->certOrEncCert.cert.certificate);
                }
            }
        }
        PORT_FreeArena(inKeyRecRep->poolp, PR_TRUE);
    }
    return SECSuccess;
}

SECStatus
CMMF_KeyRecRepContentSetPKIStatusInfoStatus(CMMFKeyRecRepContent *inKeyRecRep,
                                            CMMFPKIStatus inPKIStatus)
{
    PORT_Assert(inKeyRecRep != NULL && inPKIStatus >= cmmfGranted &&
                inPKIStatus < cmmfNumPKIStatus);
    if (inKeyRecRep == NULL) {
        return SECFailure;
    }

    return cmmf_PKIStatusInfoSetStatus(&inKeyRecRep->status,
                                       inKeyRecRep->poolp,
                                       inPKIStatus);
}

SECStatus
CMMF_KeyRecRepContentSetNewSignCert(CMMFKeyRecRepContent *inKeyRecRep,
                                    CERTCertificate *inNewSignCert)
{
    PORT_Assert(inKeyRecRep != NULL && inNewSignCert != NULL);
    if (inKeyRecRep == NULL || inNewSignCert == NULL) {
        return SECFailure;
    }
    if (!inKeyRecRep->isDecoded && inKeyRecRep->newSigCert) {
        CERT_DestroyCertificate(inKeyRecRep->newSigCert);
    }
    inKeyRecRep->isDecoded = PR_FALSE;
    inKeyRecRep->newSigCert = CERT_DupCertificate(inNewSignCert);
    return (inKeyRecRep->newSigCert == NULL) ? SECFailure : SECSuccess;
}

SECStatus
CMMF_KeyRecRepContentSetCACerts(CMMFKeyRecRepContent *inKeyRecRep,
                                CERTCertList *inCACerts)
{
    SECStatus rv;
    void *mark;

    PORT_Assert(inKeyRecRep != NULL && inCACerts != NULL);
    if (inKeyRecRep == NULL || inCACerts == NULL) {
        return SECFailure;
    }
    mark = PORT_ArenaMark(inKeyRecRep->poolp);
    rv = cmmf_ExtractCertsFromList(inCACerts, inKeyRecRep->poolp,
                                   &inKeyRecRep->caCerts);
    if (rv != SECSuccess) {
        PORT_ArenaRelease(inKeyRecRep->poolp, mark);
    } else {
        PORT_ArenaUnmark(inKeyRecRep->poolp, mark);
    }
    return rv;
}

SECStatus
CMMF_KeyRecRepContentSetCertifiedKeyPair(CMMFKeyRecRepContent *inKeyRecRep,
                                         CERTCertificate *inCert,
                                         SECKEYPrivateKey *inPrivKey,
                                         SECKEYPublicKey *inPubKey)
{
    CMMFCertifiedKeyPair *keyPair;
    CRMFEncryptedValue *dummy;
    PLArenaPool *poolp;
    void *mark;
    SECStatus rv;

    PORT_Assert(inKeyRecRep != NULL &&
                inCert != NULL &&
                inPrivKey != NULL &&
                inPubKey != NULL);
    if (inKeyRecRep == NULL ||
        inCert == NULL ||
        inPrivKey == NULL ||
        inPubKey == NULL) {
        return SECFailure;
    }
    poolp = inKeyRecRep->poolp;
    mark = PORT_ArenaMark(poolp);
    if (inKeyRecRep->keyPairHist == NULL) {
        inKeyRecRep->keyPairHist = PORT_ArenaNewArray(poolp,
                                                      CMMFCertifiedKeyPair *,
                                                      (CMMF_MAX_KEY_PAIRS + 1));
        if (inKeyRecRep->keyPairHist == NULL) {
            goto loser;
        }
        inKeyRecRep->allocKeyPairs = CMMF_MAX_KEY_PAIRS;
        inKeyRecRep->numKeyPairs = 0;
    }

    if (inKeyRecRep->allocKeyPairs == inKeyRecRep->numKeyPairs) {
        goto loser;
    }

    keyPair = PORT_ArenaZNew(poolp, CMMFCertifiedKeyPair);
    if (keyPair == NULL) {
        goto loser;
    }
    rv = cmmf_CertOrEncCertSetCertificate(&keyPair->certOrEncCert,
                                          poolp, inCert);
    if (rv != SECSuccess) {
        goto loser;
    }
    keyPair->privateKey = PORT_ArenaZNew(poolp, CRMFEncryptedValue);
    if (keyPair->privateKey == NULL) {
        goto loser;
    }
    dummy = crmf_create_encrypted_value_wrapped_privkey(inPrivKey, inPubKey,
                                                        keyPair->privateKey);
    PORT_Assert(dummy == keyPair->privateKey);
    if (dummy != keyPair->privateKey) {
        crmf_destroy_encrypted_value(dummy, PR_TRUE);
        goto loser;
    }
    inKeyRecRep->keyPairHist[inKeyRecRep->numKeyPairs] = keyPair;
    inKeyRecRep->numKeyPairs++;
    inKeyRecRep->keyPairHist[inKeyRecRep->numKeyPairs] = NULL;
    PORT_ArenaUnmark(poolp, mark);
    return SECSuccess;

loser:
    PORT_ArenaRelease(poolp, mark);
    return SECFailure;
}

CMMFPKIStatus
CMMF_KeyRecRepContentGetPKIStatusInfoStatus(CMMFKeyRecRepContent *inKeyRecRep)
{
    PORT_Assert(inKeyRecRep != NULL);
    if (inKeyRecRep == NULL) {
        return cmmfNoPKIStatus;
    }
    return cmmf_PKIStatusInfoGetStatus(&inKeyRecRep->status);
}

CERTCertificate *
CMMF_KeyRecRepContentGetNewSignCert(CMMFKeyRecRepContent *inKeyRecRep)
{
    PORT_Assert(inKeyRecRep != NULL);
    if (inKeyRecRep == NULL ||
        inKeyRecRep->newSigCert == NULL) {
        return NULL;
    }
    /* newSigCert may not be a real certificate, it may be a hand decoded
     * cert structure. This code makes sure we hand off a real, fully formed
     * CERTCertificate to the caller. TODO: This should move into the decode
     * portion so that we never wind up with a half formed CERTCertificate
     * here. In this case the call would be to CERT_DupCertificate.
     */
    return CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
                                   &inKeyRecRep->newSigCert->signatureWrap.data,
                                   NULL, PR_FALSE, PR_TRUE);
}

CERTCertList *
CMMF_KeyRecRepContentGetCACerts(CMMFKeyRecRepContent *inKeyRecRep)
{
    PORT_Assert(inKeyRecRep != NULL);
    if (inKeyRecRep == NULL || inKeyRecRep->caCerts == NULL) {
        return NULL;
    }
    return cmmf_MakeCertList(inKeyRecRep->caCerts);
}

int
CMMF_KeyRecRepContentGetNumKeyPairs(CMMFKeyRecRepContent *inKeyRecRep)
{
    PORT_Assert(inKeyRecRep != NULL);
    return (inKeyRecRep == NULL) ? 0 : inKeyRecRep->numKeyPairs;
}

PRBool
cmmf_KeyRecRepContentIsValidIndex(CMMFKeyRecRepContent *inKeyRecRep,
                                  int inIndex)
{
    int numKeyPairs = CMMF_KeyRecRepContentGetNumKeyPairs(inKeyRecRep);

    return (PRBool)(inIndex >= 0 && inIndex < numKeyPairs);
}

CMMFCertifiedKeyPair *
CMMF_KeyRecRepContentGetCertKeyAtIndex(CMMFKeyRecRepContent *inKeyRecRep,
                                       int inIndex)
{
    CMMFCertifiedKeyPair *newKeyPair;
    SECStatus rv;

    PORT_Assert(inKeyRecRep != NULL &&
                cmmf_KeyRecRepContentIsValidIndex(inKeyRecRep, inIndex));
    if (inKeyRecRep == NULL ||
        !cmmf_KeyRecRepContentIsValidIndex(inKeyRecRep, inIndex)) {
        return NULL;
    }
    newKeyPair = PORT_ZNew(CMMFCertifiedKeyPair);
    if (newKeyPair == NULL) {
        return NULL;
    }
    rv = cmmf_CopyCertifiedKeyPair(NULL, newKeyPair,
                                   inKeyRecRep->keyPairHist[inIndex]);
    if (rv != SECSuccess) {
        CMMF_DestroyCertifiedKeyPair(newKeyPair);
        newKeyPair = NULL;
    }
    return newKeyPair;
}

SECStatus
CMMF_CertifiedKeyPairUnwrapPrivKey(CMMFCertifiedKeyPair *inKeyPair,
                                   SECKEYPrivateKey *inPrivKey,
                                   SECItem *inNickName,
                                   PK11SlotInfo *inSlot,
                                   CERTCertDBHandle *inCertdb,
                                   SECKEYPrivateKey **destPrivKey,
                                   void *wincx)
{
    CERTCertificate *cert;
    SECItem keyUsageValue = { siBuffer, NULL, 0 };
    unsigned char keyUsage = 0x0;
    SECKEYPublicKey *pubKey;
    SECStatus rv;

    PORT_Assert(inKeyPair != NULL &&
                inPrivKey != NULL && inCertdb != NULL);
    if (inKeyPair == NULL ||
        inPrivKey == NULL ||
        inKeyPair->privateKey == NULL ||
        inCertdb == NULL) {
        return SECFailure;
    }

    cert = CMMF_CertifiedKeyPairGetCertificate(inKeyPair, inCertdb);
    CERT_FindKeyUsageExtension(cert, &keyUsageValue);
    if (keyUsageValue.data != NULL) {
        keyUsage = keyUsageValue.len ? keyUsageValue.data[0] : 0;
        PORT_Free(keyUsageValue.data);
    }
    pubKey = CERT_ExtractPublicKey(cert);
    rv = crmf_encrypted_value_unwrap_priv_key(NULL, inKeyPair->privateKey,
                                              inPrivKey, pubKey,
                                              inNickName, inSlot, keyUsage,
                                              destPrivKey, wincx);
    SECKEY_DestroyPublicKey(pubKey);
    CERT_DestroyCertificate(cert);
    return rv;
}

PRBool
CMMF_KeyRecRepContentHasCACerts(CMMFKeyRecRepContent *inKeyRecRep)
{
    PORT_Assert(inKeyRecRep != NULL);
    if (inKeyRecRep == NULL) {
        return PR_FALSE;
    }
    return (PRBool)(inKeyRecRep->caCerts != NULL &&
                    inKeyRecRep->caCerts[0] != NULL);
}