/* 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/. */
/*
 * validateChain.c
 *
 * Tests Cert Chain Validation
 *
 */

#include <stdio.h>
#include <string.h>
#include <stddef.h>

#include "pkix_pl_generalname.h"
#include "pkix_pl_cert.h"
#include "pkix.h"
#include "testutil.h"
#include "prlong.h"
#include "plstr.h"
#include "prthread.h"
#include "nspr.h"
#include "prtypes.h"
#include "prtime.h"
#include "pk11func.h"
#include "secasn1.h"
#include "cert.h"
#include "cryptohi.h"
#include "secoid.h"
#include "certdb.h"
#include "secitem.h"
#include "keythi.h"
#include "nss.h"

static void *plContext = NULL;

static void
printUsage(void)
{
    (void)printf("\nUSAGE:\tvalidateChain <trustedCert> "
                 "<cert_1> <cert_2> ... <cert_n>\n");
    (void)printf("\tValidates a chain of n certificates "
                 "using the given trust anchor.\n");
}

static PKIX_PL_Cert *
createCert(char *inFileName)
{
    PKIX_PL_ByteArray *byteArray = NULL;
    void *buf = NULL;
    PRFileDesc *inFile = NULL;
    PKIX_UInt32 len;
    SECItem certDER;
    SECStatus rv;
    /* default: NULL cert (failure case) */
    PKIX_PL_Cert *cert = NULL;

    PKIX_TEST_STD_VARS();

    certDER.data = NULL;

    inFile = PR_Open(inFileName, PR_RDONLY, 0);

    if (!inFile) {
        pkixTestErrorMsg = "Unable to open cert file";
        goto cleanup;
    } else {
        rv = SECU_ReadDERFromFile(&certDER, inFile, PR_FALSE, PR_FALSE);
        if (!rv) {
            buf = (void *)certDER.data;
            len = certDER.len;

            PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_ByteArray_Create(buf, len, &byteArray, plContext));

            PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_Cert_Create(byteArray, &cert, plContext));

            SECITEM_FreeItem(&certDER, PR_FALSE);
        } else {
            pkixTestErrorMsg = "Unable to read DER from cert file";
            goto cleanup;
        }
    }

cleanup:

    if (inFile) {
        PR_Close(inFile);
    }

    if (PKIX_TEST_ERROR_RECEIVED) {
        SECITEM_FreeItem(&certDER, PR_FALSE);
    }

    PKIX_TEST_DECREF_AC(byteArray);

    PKIX_TEST_RETURN();

    return (cert);
}

int
validate_chain(int argc, char *argv[])
{
    PKIX_TrustAnchor *anchor = NULL;
    PKIX_List *anchors = NULL;
    PKIX_List *certs = NULL;
    PKIX_ProcessingParams *procParams = NULL;
    PKIX_ValidateParams *valParams = NULL;
    PKIX_ValidateResult *valResult = NULL;
    PKIX_PL_X500Name *subject = NULL;
    PKIX_ComCertSelParams *certSelParams = NULL;
    PKIX_CertSelector *certSelector = NULL;
    PKIX_VerifyNode *verifyTree = NULL;
    PKIX_PL_String *verifyString = NULL;

    char *trustedCertFile = NULL;
    char *chainCertFile = NULL;
    PKIX_PL_Cert *trustedCert = NULL;
    PKIX_PL_Cert *chainCert = NULL;
    PKIX_UInt32 chainLength = 0;
    PKIX_UInt32 i = 0;
    PKIX_UInt32 j = 0;
    PKIX_UInt32 actualMinorVersion;

    PKIX_TEST_STD_VARS();

    if (argc < 3) {
        printUsage();
        return (0);
    }

    PKIX_TEST_EXPECT_NO_ERROR(
        PKIX_PL_NssContext_Create(0, PKIX_FALSE, NULL, &plContext));

    chainLength = (argc - j) - 2;

    /* create processing params with list of trust anchors */
    trustedCertFile = argv[1 + j];
    trustedCert = createCert(trustedCertFile);

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_Cert_GetSubject(trustedCert, &subject, plContext));

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ComCertSelParams_Create(&certSelParams, plContext));

#if 0
        PKIX_TEST_EXPECT_NO_ERROR(PKIX_ComCertSelParams_SetSubject
                                    (certSelParams, subject, plContext));
#endif

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_CertSelector_Create(NULL, NULL, &certSelector, plContext));

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_CertSelector_SetCommonCertSelectorParams(certSelector, certSelParams, plContext));

    PKIX_TEST_DECREF_BC(subject);
    PKIX_TEST_DECREF_BC(certSelParams);

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_TrustAnchor_CreateWithCert(trustedCert, &anchor, plContext));

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_Create(&anchors, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_AppendItem(anchors, (PKIX_PL_Object *)anchor, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ProcessingParams_Create(anchors, &procParams, plContext));

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ProcessingParams_SetTargetCertConstraints(procParams, certSelector, plContext));

    PKIX_TEST_DECREF_BC(certSelector);

    /* create cert chain */
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_Create(&certs, plContext));
    for (i = 0; i < chainLength; i++) {
        chainCertFile = argv[(i + j) + 2];
        chainCert = createCert(chainCertFile);

        PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_AppendItem(certs,
                                                       (PKIX_PL_Object *)chainCert,
                                                       plContext));

        PKIX_TEST_DECREF_BC(chainCert);
        chainCert = NULL;
    }
    /* create validate params with processing params and cert chain */
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ValidateParams_Create(procParams, certs, &valParams, plContext));

    PKIX_TEST_DECREF_BC(trustedCert);
    trustedCert = NULL;
    PKIX_TEST_DECREF_BC(anchor);
    anchor = NULL;
    PKIX_TEST_DECREF_BC(anchors);
    anchors = NULL;
    PKIX_TEST_DECREF_BC(certs);
    certs = NULL;
    PKIX_TEST_DECREF_BC(procParams);
    procParams = NULL;

    /* validate cert chain using processing params and return valResult */

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ValidateChain(valParams, &valResult, &verifyTree, plContext));

    if (valResult != NULL) {
        (void)printf("SUCCESSFULLY VALIDATED\n");
    }

cleanup:

    if (PKIX_TEST_ERROR_RECEIVED) {
        (void)printf("FAILED TO VALIDATE\n");
        (void)PKIX_PL_Object_ToString((PKIX_PL_Object *)verifyTree, &verifyString, plContext);
        (void)printf("verifyTree is\n%s\n", verifyString->escAsciiString);
        PKIX_TEST_DECREF_AC(verifyString);
    }

    PKIX_TEST_DECREF_AC(verifyTree);
    PKIX_TEST_DECREF_AC(valResult);
    PKIX_TEST_DECREF_AC(valParams);

    PKIX_TEST_RETURN();

    PKIX_Shutdown(plContext);

    return (0);
}