/* 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/. */
/*
 * test_policychecker.c
 *
 * Test Policy Checking
 *
 */

#include "testutil.h"
#include "testutil_nss.h"

#define PKIX_TEST_MAX_CERTS 10

static void *plContext = NULL;

static void
printUsage(char *testname)
{
    char *fmt =
        "USAGE: %s testname"
        " [ENE|EE] \"{OID[:OID]*}\" [A|E|P] cert [cert]*\n"
        "(The quotes are needed around the OID argument for dbx.)\n"
        "(The optional arg A indicates initialAnyPolicyInhibit.)\n"
        "(The optional arg E indicates initialExplicitPolicy.)\n"
        "(The optional arg P indicates initialPolicyMappingInhibit.)\n";
    printf(fmt, testname);
}

static void
printUsageMax(PKIX_UInt32 numCerts)
{
    printf("\nUSAGE ERROR: number of certs %d exceed maximum %d\n",
           numCerts, PKIX_TEST_MAX_CERTS);
}

static PKIX_List *
policySetParse(char *policyString)
{
    char *p = NULL;
    char *oid = NULL;
    char c = '\0';
    PKIX_Boolean validString = PKIX_FALSE;
    PKIX_PL_OID *plOID = NULL;
    PKIX_List *policySet = NULL;

    PKIX_TEST_STD_VARS();

    p = policyString;

    /*
         * There may or may not be quotes around the initial-policy-set
         * string. If they are omitted, dbx will strip off the curly braces.
         * If they are included, dbx will strip off the quotes, but if you
         * are running directly from a script, without dbx, the quotes will
         * not be stripped. We need to be able to handle both cases.
         */
    if (*p == '"') {
        p++;
    }

    if ('{' != *p++) {
        return (NULL);
    }
    oid = p;

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_Create(&policySet, plContext));

    /* scan to the end of policyString */
    while (!validString) {
        /* scan to the end of the current OID string */
        c = *oid;
        while ((c != '\0') && (c != ':') && (c != '}')) {
            c = *++oid;
        }

        if ((c != ':') || (c != '}')) {
            *oid = '\0'; /* store a null terminator */
            PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_OID_Create(p, &plOID, plContext));

            PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_AppendItem(policySet,
                                                           (PKIX_PL_Object *)plOID,
                                                           plContext));

            PKIX_TEST_DECREF_BC(plOID);
            plOID = NULL;
            if (c == '}') {
                /*
                                * Any exit but this one means
                                * we were given a badly-formed string.
                                */
                validString = PKIX_TRUE;
            }
            p = ++oid;
        }
    }

cleanup:
    if (!validString) {
        PKIX_TEST_DECREF_AC(plOID);
        PKIX_TEST_DECREF_AC(policySet);
        policySet = NULL;
    }

    PKIX_TEST_RETURN();

    return (policySet);
}

/*
 * FUNCTION: treeToStringHelper
 *  This function obtains the string representation of a PolicyNode
 *  Tree and compares it to the expected value.
 * PARAMETERS:
 *  "parent" - a PolicyNode, the root of a PolicyNodeTree;
 *      must be non-NULL.
 *  "expected" - the desired string.
 * THREAD SAFETY:
 *  Thread Safe
 *
 *  Multiple threads can safely call this function without worrying
 *  about conflicts, even if they're operating on the same object.
 * RETURNS:
 *  Nothing.
 */
static void
treeToStringHelper(PKIX_PolicyNode *parent, char *expected)
{
    PKIX_PL_String *stringRep = NULL;
    char *actual = NULL;
    PKIX_TEST_STD_VARS();

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_Object_ToString((PKIX_PL_Object *)parent, &stringRep, plContext));

    actual = PKIX_String2ASCII(stringRep, plContext);
    if (actual == NULL) {
        pkixTestErrorMsg = "PKIX_String2ASCII Failed";
        goto cleanup;
    }

    if (PL_strcmp(actual, expected) != 0) {
        testError("unexpected mismatch");
        (void)printf("Actual value:\t%s\n", actual);
        (void)printf("Expected value:\t%s\n", expected);
    }

cleanup:

    PKIX_PL_Free(actual, plContext);

    PKIX_TEST_DECREF_AC(stringRep);

    PKIX_TEST_RETURN();
}

static void
testPass(char *dirName, char *goodInput, char *diffInput, char *dateAscii)
{

    PKIX_List *chain = NULL;
    PKIX_ValidateParams *valParams = NULL;
    PKIX_ValidateResult *valResult = NULL;

    PKIX_TEST_STD_VARS();

    subTest("Basic-Common-Fields <pass>");
    /*
         * Tests the Expiration, NameChaining, and Signature Checkers
         */

    chain = createCertChain(dirName, goodInput, diffInput, plContext);

    valParams = createValidateParams(dirName,
                                     goodInput,
                                     diffInput,
                                     dateAscii,
                                     NULL,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     chain,
                                     plContext);

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

cleanup:

    PKIX_TEST_DECREF_AC(chain);
    PKIX_TEST_DECREF_AC(valParams);
    PKIX_TEST_DECREF_AC(valResult);

    PKIX_TEST_RETURN();
}

static void
testNistTest1(char *dirName)
{
#define PKIX_TEST_NUM_CERTS 2
    char *trustAnchor =
        "TrustAnchorRootCertificate.crt";
    char *intermediateCert =
        "GoodCACert.crt";
    char *endEntityCert =
        "ValidCertificatePathTest1EE.crt";
    char *certNames[PKIX_TEST_NUM_CERTS];
    char *asciiAnyPolicy = "2.5.29.32.0";
    PKIX_PL_Cert *certs[PKIX_TEST_NUM_CERTS] = { NULL, NULL };

    PKIX_ValidateParams *valParams = NULL;
    PKIX_ValidateResult *valResult = NULL;
    PKIX_List *chain = NULL;
    PKIX_PL_OID *anyPolicyOID = NULL;
    PKIX_List *initialPolicies = NULL;
    char *anchorName = NULL;

    PKIX_TEST_STD_VARS();

    subTest("testNistTest1: Creating the cert chain");
    /*
         * Create a chain, but don't include the first certName.
         * That's the anchor, and is supplied separately from
         * the chain.
         */
    certNames[0] = intermediateCert;
    certNames[1] = endEntityCert;
    chain = createCertChainPlus(dirName, certNames, certs, PKIX_TEST_NUM_CERTS, plContext);

    subTest("testNistTest1: Creating the Validate Parameters");
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_OID_Create(asciiAnyPolicy, &anyPolicyOID, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_Create(&initialPolicies, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_AppendItem(initialPolicies, (PKIX_PL_Object *)anyPolicyOID, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_SetImmutable(initialPolicies, plContext));

    valParams = createValidateParams(dirName,
                                     trustAnchor,
                                     NULL,
                                     NULL,
                                     initialPolicies,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     chain,
                                     plContext);

    subTest("testNistTest1: Validating the chain");
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ValidateChain(valParams, &valResult, NULL, plContext));

cleanup:

    PKIX_PL_Free(anchorName, plContext);

    PKIX_TEST_DECREF_AC(anyPolicyOID);
    PKIX_TEST_DECREF_AC(initialPolicies);
    PKIX_TEST_DECREF_AC(valParams);
    PKIX_TEST_DECREF_AC(valResult);
    PKIX_TEST_DECREF_AC(chain);

    PKIX_TEST_RETURN();
}

static void
testNistTest2(char *dirName)
{
#define PKIX_TEST_NUM_CERTS 2
    char *trustAnchor =
        "TrustAnchorRootCertificate.crt";
    char *intermediateCert =
        "GoodCACert.crt";
    char *endEntityCert =
        "ValidCertificatePathTest1EE.crt";
    char *certNames[PKIX_TEST_NUM_CERTS];
    char *asciiNist1Policy = "2.16.840.1.101.3.2.1.48.1";
    PKIX_PL_Cert *certs[PKIX_TEST_NUM_CERTS] = { NULL, NULL };

    PKIX_ValidateParams *valParams = NULL;
    PKIX_ValidateResult *valResult = NULL;
    PKIX_List *chain = NULL;
    PKIX_PL_OID *Nist1PolicyOID = NULL;
    PKIX_List *initialPolicies = NULL;
    char *anchorName = NULL;

    PKIX_TEST_STD_VARS();

    subTest("testNistTest2: Creating the cert chain");
    /*
         * Create a chain, but don't include the first certName.
         * That's the anchor, and is supplied separately from
         * the chain.
         */
    certNames[0] = intermediateCert;
    certNames[1] = endEntityCert;
    chain = createCertChainPlus(dirName, certNames, certs, PKIX_TEST_NUM_CERTS, plContext);

    subTest("testNistTest2: Creating the Validate Parameters");
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_OID_Create(asciiNist1Policy, &Nist1PolicyOID, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_Create(&initialPolicies, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_AppendItem(initialPolicies, (PKIX_PL_Object *)Nist1PolicyOID, plContext));
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_List_SetImmutable(initialPolicies, plContext));

    valParams = createValidateParams(dirName,
                                     trustAnchor,
                                     NULL,
                                     NULL,
                                     initialPolicies,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     PKIX_FALSE,
                                     chain,
                                     plContext);

    subTest("testNistTest2: Validating the chain");
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ValidateChain(valParams, &valResult, NULL, plContext));

cleanup:

    PKIX_PL_Free(anchorName, plContext);

    PKIX_TEST_DECREF_AC(Nist1PolicyOID);
    PKIX_TEST_DECREF_AC(initialPolicies);
    PKIX_TEST_DECREF_AC(valParams);
    PKIX_TEST_DECREF_AC(valResult);
    PKIX_TEST_DECREF_AC(chain);

    PKIX_TEST_RETURN();
}

static void
printValidPolicyTree(PKIX_ValidateResult *valResult)
{
    PKIX_PolicyNode *validPolicyTree = NULL;
    PKIX_PL_String *treeString = NULL;

    PKIX_TEST_STD_VARS();
    PKIX_TEST_EXPECT_NO_ERROR(PKIX_ValidateResult_GetPolicyTree(valResult, &validPolicyTree, plContext));
    if (validPolicyTree) {
        PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_Object_ToString((PKIX_PL_Object *)validPolicyTree,
                                                          &treeString,
                                                          plContext));
        (void)printf("validPolicyTree is\n\t%s\n",
                     treeString->escAsciiString);
    } else {
        (void)printf("validPolicyTree is NULL\n");
    }

cleanup:

    PKIX_TEST_DECREF_AC(validPolicyTree);
    PKIX_TEST_DECREF_AC(treeString);

    PKIX_TEST_RETURN();
}

int
test_policychecker(int argc, char *argv[])
{

    PKIX_Boolean initialPolicyMappingInhibit = PKIX_FALSE;
    PKIX_Boolean initialAnyPolicyInhibit = PKIX_FALSE;
    PKIX_Boolean initialExplicitPolicy = PKIX_FALSE;
    PKIX_Boolean expectedResult = PKIX_FALSE;
    PKIX_UInt32 chainLength = 0;
    PKIX_UInt32 initArgs = 0;
    PKIX_UInt32 firstCert = 0;
    PKIX_UInt32 i = 0;
    PKIX_Int32 j = 0;
    PKIX_UInt32 actualMinorVersion;
    PKIX_ProcessingParams *procParams = NULL;
    char *firstTrustAnchor = "yassir2yassir";
    char *secondTrustAnchor = "yassir2bcn";
    char *dateAscii = "991201000000Z";
    PKIX_ValidateParams *valParams = NULL;
    PKIX_ValidateResult *valResult = NULL;
    PKIX_List *userInitialPolicySet = NULL; /* List of PKIX_PL_OID */
    char *certNames[PKIX_TEST_MAX_CERTS];
    PKIX_PL_Cert *certs[PKIX_TEST_MAX_CERTS];
    PKIX_List *chain = NULL;
    PKIX_Error *validationError = NULL;
    PKIX_VerifyNode *verifyTree = NULL;
    PKIX_PL_String *verifyString = NULL;
    char *dirName = NULL;
    char *dataCentralDir = NULL;
    char *anchorName = NULL;

    PKIX_TEST_STD_VARS();

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

    /*
         * Perform hard-coded tests if no command line args.
         * If command line args are provided, they must be:
         * arg[1]: test name
         * arg[2]: "ENE" or "EE", for "expect no error" or "expect error"
         * arg[3]: directory for certificates
         * arg[4]: user-initial-policy-set, consisting of braces
         *      containing zero or more OID sequences, separated by commas
         * arg[5]: (optional) "E", indicating initialExplicitPolicy
         * arg[firstCert]: the path and filename of the trust anchor certificate
         * arg[firstCert+1..(n-1)]: successive certificates in the chain
         * arg[n]: the end entity certificate
         *
         * Example: test_policychecker test1EE ENE
         *      {2.5.29.32.0,2.5.29.32.3.6} Anchor CA EndEntity
         */

    dirName = argv[3 + j];
    dataCentralDir = argv[4 + j];

    if (argc <= 5 || ((6 == argc) && (j))) {

        testPass(dataCentralDir,
                 firstTrustAnchor,
                 secondTrustAnchor,
                 dateAscii);

        testNistTest1(dirName);

        testNistTest2(dirName);

        goto cleanup;
    }

    if (argc < (7 + j)) {
        printUsage(argv[0]);
        pkixTestErrorMsg = "Invalid command line arguments.";
        goto cleanup;
    }

    if (PORT_Strcmp(argv[2 + j], "ENE") == 0) {
        expectedResult = PKIX_TRUE;
    } else if (PORT_Strcmp(argv[2 + j], "EE") == 0) {
        expectedResult = PKIX_FALSE;
    } else {
        printUsage(argv[0]);
        pkixTestErrorMsg = "Invalid command line arguments.";
        goto cleanup;
    }

    userInitialPolicySet = policySetParse(argv[5 + j]);
    if (!userInitialPolicySet) {
        printUsage(argv[0]);
        pkixTestErrorMsg = "Invalid command line arguments.";
        goto cleanup;
    }

    for (initArgs = 0; initArgs < 3; initArgs++) {
        if (PORT_Strcmp(argv[6 + j + initArgs], "A") == 0) {
            initialAnyPolicyInhibit = PKIX_TRUE;
        } else if (PORT_Strcmp(argv[6 + j + initArgs], "E") == 0) {
            initialExplicitPolicy = PKIX_TRUE;
        } else if (PORT_Strcmp(argv[6 + j + initArgs], "P") == 0) {
            initialPolicyMappingInhibit = PKIX_TRUE;
        } else {
            break;
        }
    }

    firstCert = initArgs + j + 6;
    chainLength = argc - (firstCert + 1);
    if (chainLength > PKIX_TEST_MAX_CERTS) {
        printUsageMax(chainLength);
        pkixTestErrorMsg = "Invalid command line arguments.";
        goto cleanup;
    }

    /*
         * Create a chain, but don't include the first certName.
         * That's the anchor, and is supplied separately from
         * the chain.
         */
    for (i = 0; i < chainLength; i++) {

        certNames[i] = argv[i + (firstCert + 1)];
        certs[i] = NULL;
    }
    chain = createCertChainPlus(dirName, certNames, certs, chainLength, plContext);

    subTest(argv[1 + j]);

    valParams = createValidateParams(dirName,
                                     argv[firstCert],
                                     NULL,
                                     NULL,
                                     userInitialPolicySet,
                                     initialPolicyMappingInhibit,
                                     initialAnyPolicyInhibit,
                                     initialExplicitPolicy,
                                     PKIX_FALSE,
                                     chain,
                                     plContext);

    if (expectedResult == PKIX_TRUE) {
        subTest("   (expecting successful validation)");

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

        printValidPolicyTree(valResult);

    } else {
        subTest("   (expecting validation to fail)");
        validationError = PKIX_ValidateChain(valParams, &valResult, &verifyTree, plContext);
        if (!validationError) {
            printValidPolicyTree(valResult);
            pkixTestErrorMsg = "Should have thrown an error here.";
        }
        PKIX_TEST_DECREF_BC(validationError);
    }

    PKIX_TEST_EXPECT_NO_ERROR(PKIX_PL_Object_ToString((PKIX_PL_Object *)verifyTree, &verifyString, plContext));
    (void)printf("verifyTree is\n%s\n", verifyString->escAsciiString);

cleanup:

    PKIX_PL_Free(anchorName, plContext);

    PKIX_TEST_DECREF_AC(verifyString);
    PKIX_TEST_DECREF_AC(verifyTree);
    PKIX_TEST_DECREF_AC(userInitialPolicySet);
    PKIX_TEST_DECREF_AC(chain);
    PKIX_TEST_DECREF_AC(valParams);
    PKIX_TEST_DECREF_AC(valResult);
    PKIX_TEST_DECREF_AC(validationError);

    PKIX_Shutdown(plContext);

    PKIX_TEST_RETURN();

    endTests("PolicyChecker");

    return (0);
}