/* $Id: tstRTHttp.cpp $ */
/** @file
 * IPRT Testcase - Simple cURL testcase.
 */

/*
 * Copyright (C) 2012-2013 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */

/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include <iprt/err.h>
#include <iprt/http.h>
#include <iprt/mem.h>
#include <iprt/file.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/initterm.h>
#include <iprt/vfslowlevel.h>
#include <iprt/zip.h>

#define CAFILE_NAME "tstHttp-tempcafile.crt"

static int extractPCA3G5(RTHTTP hHttp, PRTSTREAM CAFile, uint8_t *pu8Buf, size_t cbBuf)
{
    uint8_t *abSha1;
    size_t  cbSha1;
    uint8_t *abSha512;
    size_t  cbSha512;
    char *pszBuf = (char*)pu8Buf;

    const uint8_t abSha1PCA3G5[] =
    {
        0x4e, 0xb6, 0xd5, 0x78, 0x49, 0x9b, 0x1c, 0xcf, 0x5f, 0x58,
        0x1e, 0xad, 0x56, 0xbe, 0x3d, 0x9b, 0x67, 0x44, 0xa5, 0xe5
    };
    const uint8_t abSha512PCA3G5[] =
    {
        0xd4, 0xf8, 0x10, 0x54, 0x72, 0x77, 0x0a, 0x2d,
        0xe3, 0x17, 0xb3, 0xcf, 0xed, 0x61, 0xae, 0x5c,
        0x5d, 0x3e, 0xde, 0xa1, 0x41, 0x35, 0xb2, 0xdf,
        0x60, 0xe2, 0x61, 0xfe, 0x3a, 0xc1, 0x66, 0xa3,
        0x3c, 0x88, 0x54, 0x04, 0x4f, 0x1d, 0x13, 0x46,
        0xe3, 0x8c, 0x06, 0x92, 0x9d, 0x70, 0x54, 0xc3,
        0x44, 0xeb, 0x2c, 0x74, 0x25, 0x9e, 0x5d, 0xfb,
        0xd2, 0x6b, 0xa8, 0x9a, 0xf0, 0xb3, 0x6a, 0x01
    };
    int rc = RTHttpCertDigest(hHttp, pszBuf, cbBuf,
                              &abSha1, &cbSha1, &abSha512, &cbSha512);
    if (RT_SUCCESS(rc))
    {
        if (cbSha1 != sizeof(abSha1PCA3G5))
        {
            RTPrintf("Wrong SHA1 digest size of PCA-3G5\n");
            rc = VERR_INTERNAL_ERROR;
        }
        else if (memcmp(abSha1PCA3G5, abSha1, cbSha1))
        {
            RTPrintf("Wrong SHA1 digest for PCA-3G5:\n"
                     "Got:      %.*Rhxs\n"
                     "Expected: %.*Rhxs\n",
                     cbSha1, abSha1, sizeof(abSha1PCA3G5), abSha1PCA3G5);
            rc = VERR_INTERNAL_ERROR;
        }
        if (cbSha512 != sizeof(abSha512PCA3G5))
        {
            RTPrintf("Wrong SHA512 digest size of PCA-3G5\n");
            rc = VERR_INTERNAL_ERROR;
        }
        else if (memcmp(abSha512PCA3G5, abSha512, cbSha512))
        {
            RTPrintf("Wrong SHA512 digest for PCA-3G5:\n"
                     "Got:      %.*Rhxs\n"
                     "Expected: %.*Rhxs\n",
                     cbSha512, abSha512, sizeof(abSha512PCA3G5), abSha512PCA3G5);
            rc = VERR_INTERNAL_ERROR;
        }
        RTMemFree(abSha1);
        RTMemFree(abSha512);
        if (RT_SUCCESS(rc))
            rc = RTStrmWrite(CAFile, pszBuf, cbBuf);
        if (RT_SUCCESS(rc))
            rc = RTStrmWrite(CAFile, RTFILE_LINEFEED, strlen(RTFILE_LINEFEED));
    }
    return rc;
}

static int extractPCA3(RTHTTP hHttp, PRTSTREAM CAFile, uint8_t *pu8Buf, size_t cbBuf)
{
    uint8_t *abSha1;
    size_t  cbSha1;
    uint8_t *abSha512;
    size_t  cbSha512;
    char *pszBuf = (char*)pu8Buf;

    const uint8_t abSha1PCA3[] =
    {
        0xa1, 0xdb, 0x63, 0x93, 0x91, 0x6f, 0x17, 0xe4, 0x18, 0x55,
        0x09, 0x40, 0x04, 0x15, 0xc7, 0x02, 0x40, 0xb0, 0xae, 0x6b
    };
    const uint8_t abSha512PCA3[] =
    {
        0xbb, 0xf7, 0x8a, 0x19, 0x9f, 0x37, 0xee, 0xa2,
        0xce, 0xc8, 0xaf, 0xe3, 0xd6, 0x22, 0x54, 0x20,
        0x74, 0x67, 0x6e, 0xa5, 0x19, 0xb7, 0x62, 0x1e,
        0xc1, 0x2f, 0xd5, 0x08, 0xf4, 0x64, 0xc4, 0xc6,
        0xbb, 0xc2, 0xf2, 0x35, 0xe7, 0xbe, 0x32, 0x0b,
        0xde, 0xb2, 0xfc, 0x44, 0x92, 0x5b, 0x8b, 0x9b,
        0x77, 0xa5, 0x40, 0x22, 0x18, 0x12, 0xcb, 0x3d,
        0x0a, 0x67, 0x83, 0x87, 0xc5, 0x45, 0xc4, 0x99
    };
    int rc = RTHttpCertDigest(hHttp, pszBuf, cbBuf,
                              &abSha1, &cbSha1, &abSha512, &cbSha512);
    if (RT_SUCCESS(rc))
    {
        if (cbSha1 != sizeof(abSha1PCA3))
        {
            RTPrintf("Wrong SHA1 digest size of PCA-3\n");
            rc = VERR_INTERNAL_ERROR;
        }
        else if (memcmp(abSha1PCA3, abSha1, cbSha1))
        {
            RTPrintf("Wrong SHA1 digest for PCA-3:\n"
                     "Got:      %.*Rhxs\n"
                     "Expected: %.*Rhxs\n",
                     cbSha1, abSha1, sizeof(abSha1PCA3), abSha1PCA3);
            rc = VERR_INTERNAL_ERROR;
        }
        if (cbSha512 != sizeof(abSha512PCA3))
        {
            RTPrintf("Wrong SHA512 digest size of PCA-3\n");
            rc = VERR_INTERNAL_ERROR;
        }
        else if (memcmp(abSha512PCA3, abSha512, cbSha512))
        {
            RTPrintf("Wrong SHA512 digest for PCA-3:\n"
                     "Got:      %.*Rhxs\n"
                     "Expected: %.*Rhxs\n",
                     cbSha512, abSha512, sizeof(abSha512PCA3), abSha512PCA3);
            rc = VERR_INTERNAL_ERROR;
        }
        RTMemFree(abSha1);
        RTMemFree(abSha512);
        if (RT_SUCCESS(rc))
            rc = RTStrmWrite(CAFile, pszBuf, cbBuf);
        if (RT_SUCCESS(rc))
            rc = RTStrmWrite(CAFile, RTFILE_LINEFEED, strlen(RTFILE_LINEFEED));
    }

    return rc;
}

/*
 * Check for HTTP errors, in particular properly display redirections.
 */
static void checkError(RTHTTP hHttp, int rc, const char *pszFile)
{
    if (rc == VERR_HTTP_REDIRECTED)
    {
        char *pszRedirLocation;
        int rc2 = RTHttpGetRedirLocation(hHttp, &pszRedirLocation);
        if (RT_SUCCESS(rc2))
            RTPrintf("Redirected to '%s' trying to fetch '%s'\n", pszRedirLocation, pszFile);
        else
            RTPrintf("Redirected trying to fetch '%s'\n", pszFile);
        RTStrFree(pszRedirLocation);
    }
    else
        RTPrintf("Error %Rrc trying to fetch '%s'\n", rc, pszFile);
}

int main(int argc, char **argv)
{
    unsigned cErrors = 0;

    RTR3InitExe(argc, &argv, 0);

    if (argc <= 1)
    {
        RTPrintf("usage: %s default\n", argv[0]);
        return 1;
    }

    for (int i = 1; i < argc; i++)
    {
        if (!strcmp(argv[i], "default"))
            ;
        else
        {
            RTPrintf("Unknown parameter '%s'\n", argv[i]);
            return 1;
        }
    }

    RTHTTP hHttp;
    char *pszBuf = NULL;
    PRTSTREAM CAFile = NULL;

    int rc = RTHttpCreate(&hHttp);

    /*
     * Create the certificate file
     */
    if (RT_SUCCESS(rc))
        rc = RTStrmOpen(CAFILE_NAME, "w+b", &CAFile);

    if (RT_SUCCESS(rc))
    {
        /*
         * The old way:
         */

        /*
         * Fetch the root CA certificate (new one, often avoided in cert chains by
         * using an intermediate cert which is signed by old root)
         */
        if (RT_SUCCESS(rc))
            rc = RTHttpGetText(hHttp,
                               "http://www.verisign.com/repository/roots/root-certificates/PCA-3G5.pem",
                               &pszBuf);
        if (RT_SUCCESS(rc) && pszBuf)
            rc = extractPCA3G5(hHttp, CAFile, (uint8_t*)pszBuf, strlen(pszBuf));
        else
            checkError(hHttp, rc, "PCA-3G5.pem");
        if (pszBuf)
        {
            RTMemFree(pszBuf);
            pszBuf = NULL;
        }

        /*
         * Fetch the root CA certificate (old one, but still very widely used)
         */
        if (RT_SUCCESS(rc))
            rc = RTHttpGetText(hHttp,
                               "http://www.verisign.com/repository/roots/root-certificates/PCA-3.pem",
                               &pszBuf);
        if (RT_SUCCESS(rc) && pszBuf)
            rc = extractPCA3(hHttp, CAFile, (uint8_t*)pszBuf, strlen(pszBuf));
        else
            checkError(hHttp, rc, "PCA-3.pem");
        if (pszBuf)
        {
            RTMemFree(pszBuf);
            pszBuf = NULL;
        }
        RTPrintf("Old way: rc=%Rrc\n", rc);

        /*
         * The new way:
         */
        void *pu8Buf;
        size_t cb;
        rc = RTHttpGetBinary(hHttp,
                             "http://www.verisign.com/support/roots.zip",
                             &pu8Buf, &cb);
        if (RT_SUCCESS(rc) && pu8Buf)
        {
            void *pvDecomp;
            size_t cbDecomp;
            rc = RTZipPkzipMemDecompress(&pvDecomp, &cbDecomp, pu8Buf, cb,
                                        "VeriSign Root Certificates/Generation 5 (G5) PCA/VeriSign Class 3 Public Primary Certification Authority - G5.pem");
            if (RT_SUCCESS(rc))
            {
                rc = extractPCA3G5(hHttp, CAFile, (uint8_t*)pvDecomp, cbDecomp);
                RTMemFree(pvDecomp);
                rc = RTZipPkzipMemDecompress(&pvDecomp, &cbDecomp, pu8Buf, cb,
                                             "VeriSign Root Certificates/Generation 1 (G1) PCAs/Class 3 Public Primary Certification Authority.pem");
                if (RT_SUCCESS(rc))
                {
                    rc = extractPCA3(hHttp, CAFile, (uint8_t*)pvDecomp, cbDecomp);
                    RTMemFree(pvDecomp);
                }
            }
        }
        else
            checkError(hHttp, rc, "roots.zip");
        RTPrintf("New way: rc=%Rrc\n", rc);
    }

    /*
     * Close the certificate file
     */
    if (CAFile)
    {
        RTStrmClose(CAFile);
        CAFile = NULL;
    }

    /*
     * Use it
     */
    if (RT_SUCCESS(rc))
        rc = RTHttpSetCAFile(hHttp, CAFILE_NAME);

    /*
     * Now try to do the actual HTTPS request
     */
    if (RT_SUCCESS(rc))
        rc = RTHttpGetText(hHttp,
                           "https://update.virtualbox.org/query.php?platform=LINUX_32BITS_UBUNTU_12_04&version=4.1.18",
                           &pszBuf);

    if (   RT_FAILURE(rc)
        && rc != VERR_HTTP_COULDNT_CONNECT)
        cErrors++;

    if (RT_FAILURE(rc))
        RTPrintf("Error code: %Rrc\n", rc);
    else
    {
        RTPrintf("Success!\n");
        RTPrintf("Got: %s\n", pszBuf);
    }
    if (pszBuf)
    {
        RTMemFree(pszBuf);
        pszBuf = NULL;
    }

    RTHttpDestroy(hHttp);

//    RTFileDelete(CAFILE_NAME);

    return !!cErrors;
}
