/* 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/. */

/*

 * X.509 v3 Subject Key Usage Extension

 *

 */

#include "prtypes.h"

#include "seccomon.h"

#include "secdert.h"

#include "secoidt.h"

#include "secasn1t.h"

#include "secasn1.h"

#include "secport.h"

#include "certt.h"

#include "genname.h"

#include "secerr.h"

SEC_ASN1_MKSUB(SEC_IntegerTemplate)

SEC_ASN1_MKSUB(SEC_OctetStringTemplate)

const SEC_ASN1Template CERTAuthKeyIDTemplate[] = {

    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTAuthKeyID) },

    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,

      offsetof(CERTAuthKeyID, keyID), SEC_ASN1_SUB(SEC_OctetStringTemplate) },

    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,

      offsetof(CERTAuthKeyID, DERAuthCertIssuer), CERT_GeneralNamesTemplate },

    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 2,

      offsetof(CERTAuthKeyID, authCertSerialNumber),

      SEC_ASN1_SUB(SEC_IntegerTemplate) },

    { 0 }

};

SECStatus

CERT_EncodeAuthKeyID(PLArenaPool *arena, CERTAuthKeyID *value,

                     SECItem *encodedValue)

{

    SECStatus rv = SECFailure;

    PORT_Assert(value);

    PORT_Assert(arena);

    PORT_Assert(value->DERAuthCertIssuer == NULL);

    PORT_Assert(encodedValue);

    do {

        /* If both of the authCertIssuer and the serial number exist, encode

           the name first.  Otherwise, it is an error if one exist and the other

           is not.

         */

        if (value->authCertIssuer) {

            if (!value->authCertSerialNumber.data) {

                PORT_SetError(SEC_ERROR_EXTENSION_VALUE_INVALID);

                break;

            }

            value->DERAuthCertIssuer =

                cert_EncodeGeneralNames(arena, value->authCertIssuer);

            if (!value->DERAuthCertIssuer) {

                PORT_SetError(SEC_ERROR_EXTENSION_VALUE_INVALID);

                break;

            }

        } else if (value->authCertSerialNumber.data) {

            PORT_SetError(SEC_ERROR_EXTENSION_VALUE_INVALID);

            break;

        }

        if (SEC_ASN1EncodeItem(arena, encodedValue, value,

                               CERTAuthKeyIDTemplate) == NULL)

            break;

        rv = SECSuccess;

    } while (0);

    return (rv);

}

CERTAuthKeyID *

CERT_DecodeAuthKeyID(PLArenaPool *arena, const SECItem *encodedValue)

{

    CERTAuthKeyID *value = NULL;

    SECStatus rv = SECFailure;

    void *mark;

    SECItem newEncodedValue;

    PORT_Assert(arena);

    do {

        mark = PORT_ArenaMark(arena);

        value = (CERTAuthKeyID *)PORT_ArenaZAlloc(arena, sizeof(*value));

        if (value == NULL)

            break;

        value->DERAuthCertIssuer = NULL;

        /* copy the DER into the arena, since Quick DER returns data that points

           into the DER input, which may get freed by the caller */

        rv = SECITEM_CopyItem(arena, &newEncodedValue, encodedValue);

        if (rv != SECSuccess) {

            break;

        }

        rv = SEC_QuickDERDecodeItem(arena, value, CERTAuthKeyIDTemplate,

                                    &newEncodedValue);

        if (rv != SECSuccess)

            break;

        value->authCertIssuer =

            cert_DecodeGeneralNames(arena, value->DERAuthCertIssuer);

        if (value->authCertIssuer == NULL)

            break;

        /* what if the general name contains other format but not URI ?

           hl

         */

        if ((value->authCertSerialNumber.data && !value->authCertIssuer) ||

            (!value->authCertSerialNumber.data && value->authCertIssuer)) {

            PORT_SetError(SEC_ERROR_EXTENSION_VALUE_INVALID);

            break;

        }

    } while (0);

    if (rv != SECSuccess) {

        PORT_ArenaRelease(arena, mark);

        return ((CERTAuthKeyID *)NULL);

    }

    PORT_ArenaUnmark(arena, mark);

    return (value);

}