<?php
/*
 *  Jirafeau, your web file repository
 *  Copyright (C) 2008  Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
 *  Copyright (C) 2015  Jerome Jutteau <jerome@jutteau.fr>
 *  Copyright (C) 2024  Jirafeau project <https://gitlab.com/jirafeau> (see AUTHORS.md)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

/* This file offer a kind of API for jirafeau. */

define('JIRAFEAU_ROOT', dirname(__FILE__) . '/');

require(JIRAFEAU_ROOT . 'lib/settings.php');
require(JIRAFEAU_ROOT . 'lib/functions.php');
require(JIRAFEAU_ROOT . 'lib/lang.php');

global $script_langages;
$script_langages = array('bash' => 'Bash');

/* Operations may take a long time.
 * Be sure PHP's safe mode is off.
 */
@set_time_limit(0);

if ($_SERVER['REQUEST_METHOD'] == "GET" && count($_GET) == 0) {
    require(JIRAFEAU_ROOT . 'lib/template/header.php');
    check_errors($cfg);
    if (has_error()) {
        show_errors();
        require(JIRAFEAU_ROOT . 'lib/template/footer.php');
        exit;
    } ?>
    <div class="info">
    <h2>Scripting interface</h2>
    <p>This interface permits to script your uploads and downloads.</p>
    <p>See <a href="<?php echo JIRAFEAU_WEBSITE ?>/blob/master/script.php">source code</a> of this interface to get available calls :)</p>
    <p>You may download a preconfigured <a href="script.php?lang=bash">Bash Script</a> to easily send to and get files from the API via command line.</p>
    </div>
    <br />
    <?php
    require(JIRAFEAU_ROOT . 'lib/template/footer.php');
    exit;
}

/* Lets use interface now. */
header('Content-Type: text/plain; charset=utf-8');

check_errors($cfg);
if (has_error()) {
    echo 'Error 1';
    exit;
}

session_start();

/* Upload file */
if (isset($_FILES['file']) && is_writable(VAR_FILES)
    && is_writable(VAR_LINKS)) {
    if (!jirafeau_user_session_logged()) {
        if (isset($_POST['upload_password']) &&
            !jirafeau_challenge_upload($cfg, get_ip_address($cfg), $_POST['upload_password'])) {
            echo 'Error 3: Invalid password';
            exit;
        } elseif (!isset($_POST['upload_password']) && !jirafeau_challenge_upload($cfg, get_ip_address($cfg), null)) {
            echo 'Error 2: No password nor allowed IP';
            exit;
        }
    }

    $key = '';
    if (isset($_POST['key'])) {
        $key = $_POST['key'];
        if ($cfg['download_password_requirement'] !== 'generated' && $cfg['download_password_policy'] === 'regex') {
            if (!preg_match($cfg['download_password_policy_regex'], $key)) {
                echo 'Error 14: The download password is not complying to the security standards.';
                exit;
            }
        }
    } elseif ($cfg['download_password_requirement'] !== 'optional') {
        echo 'Error 13: The parameter password is required.';
        exit;
    }

    if (!isset($_POST['time']) || !$cfg['availabilities'][$_POST['time']]) {
        echo 'Error 4: The parameter time is invalid.';
        exit;
    } else {
        $time = jirafeau_datestr_to_int($_POST['time']);
    }

    // Check file size
    if ($cfg['maximal_upload_size'] > 0 &&
        $_FILES['file']['size'] > $cfg['maximal_upload_size'] * 1024 * 1024) {
        echo 'Error 5: Your file exceeds the maximum authorized file size.';
        exit;
    }

    // Check if one time download is enabled
    if (!$cfg['one_time_download'] && isset($_POST['one_time_download'])) {
        echo 'Error 26: One time download is disabled.';
        exit;
    }

    if ($cfg['store_uploader_ip']) {
        $ip = get_ip_address($cfg);
    } else {
        $ip = "";
    }

    $res = jirafeau_upload(
        $_FILES['file'],
        isset($_POST['one_time_download']),
        $key,
        $time,
        $ip,
        $cfg['enable_crypt'],
        $cfg['link_name_length'],
        $cfg['file_hash']
    );

    if (empty($res) || $res['error']['has_error']) {
        echo 'Error 6 ' . $res['error']['why'];
        exit;
    }
    /* Print direct link. */
    echo $res['link'];
    /* Print delete link. */
    echo NL;
    echo $res['delete_link'];
    /* Print decrypt key. */
    echo NL;
    echo urlencode($res['crypt_key']);
} elseif (isset($_GET['h'])) {
    $link_name = $_GET['h'];
    $key = '';
    if (isset($_POST['key'])) {
        $key = $_POST['key'];
        if ($cfg['download_password_requirement'] !== 'generated' && $cfg['download_password_policy'] === 'regex') {
            if (!preg_match($cfg['download_password_policy_regex'], $key)) {
                echo 'Error 14: The download password is not complying to the security standards.';
                exit;
            }
        }
    } elseif ($cfg['download_password_requirement'] !== 'optional') {
        echo 'Error 13: The parameter password is required.';
        exit;
    }
    $d = '';
    if (isset($_GET['d'])) {
        $d = $_GET['d'];
    }

    if (!preg_match('/[0-9a-zA-Z_-]+$/', $link_name)) {
        echo 'Error 7';
        exit;
    }

    $link = jirafeau_get_link($link_name);
    if (count($link) == 0) {
        echo 'Error 8';
        exit;
    }
    if (strlen($d) > 0 && $d == $link['link_code']) {
        jirafeau_delete_link($link_name);
        echo 'Ok';
        exit;
    }
    if ($link['time'] != JIRAFEAU_INFINITY && time() > $link['time']) {
        jirafeau_delete_link($link_name);
        echo 'Error 9';
        exit;
    }
    if (strlen($link['key']) > 0 && hash('sha256', $key) != $link['key']) {
        sleep(2);
        echo 'Error 10';
        exit;
    }
    $p = s2p($link['hash']);
    if (!file_exists(VAR_FILES . $p . $link['hash'])) {
        echo 'Error 11';
        exit;
    }

    /* Read file. */
    header('Content-Length: ' . $link['file_size']);
    header('Content-Type: ' . $link['mime_type']);
    header('Content-Disposition: attachment; filename="' .
            $link['file_name'] . '"');

    $r = fopen(VAR_FILES . $p . $link['hash'], 'r');
    while (!feof($r)) {
        print fread($r, 1024);
    }
    fclose($r);

    if ($link['onetime'] == 'O') {
        jirafeau_delete_link($link_name);
    }
    exit;
} elseif (isset($_GET['get_capacity'])) {
    echo jirafeau_get_max_upload_size_bytes();
} elseif (isset($_GET['get_maximal_upload_size'])) {
    echo $cfg['maximal_upload_size'];
} elseif (isset($_GET['get_version'])) {
    echo JIRAFEAU_VERSION;
} elseif (isset($_GET['lang'])) {
    $l = $_GET['lang'];
    if ($l == 'bash') {
        ?>
#!/bin/bash

# This script has been auto-generated by Jirafeau but you can still edit options below.

# Config begin
proxy='' # Or set JIRAFEAU_PROXY.
url='<?php echo $cfg['web_root']; ?>' # Or set JIRAFEAU_URL.
time='<?php echo $cfg['availability_default']; ?>' # Or set JIRAFEAU_TIME.
one_time='' # Or set JIRAFEAU_ONE_TIME.
curl='' # Or set JIRAFEAU_CURL_PATH.
upload_password='' # Or set JIRAFEAU_UPLOAD_PASSWD
# Config end

if [ -n "$JIRAFEAU_PROXY" ]; then
    proxy="$JIRAFEAU_PROXY"
fi

if [ -n "$JIRAFEAU_URL" ]; then
    url="$JIRAFEAU_URL"
fi

if [ -z "$url" ]; then
    echo "Please set url in script parameters or export JIRAFEAU_URL"
fi

if [ -n "$JIRAFEAU_TIME" ]; then
    time="$JIRAFEAU_TIME"
fi

if [ -n "$JIRAFEAU_ONE_TIME" ]; then
    one_time='1'
fi

if [ -n "$JIRAFEAU_UPLOAD_PASSWD" ]; then
    upload_password="$JIRAFEAU_UPLOAD_PASSWD"
fi

if [ -z "$curl" ]; then
    curl="$JIRAFEAU_CURL_PATH"
fi

if [ -z "$curl" ] && [ -e "/usr/bin/curl" ]; then
    curl="/usr/bin/curl"
fi

if [ -z "$curl" ] && [ -e "/bin/curl.exe" ]; then
    curl="/bin/curl.exe"
fi

if [ -z "$curl" ]; then
    echo "Please set your curl binary path (by editing this script or export JIRAFEAU_CURL_PATH global variable)."
    exit
fi

if [ -z "$2" ]; then
    echo "Jirafeau Bash Script <?php echo JIRAFEAU_VERSION; ?>"
    echo "--------------------------"
    echo "Usage:"
    echo "    $0 OPTIONS"
    echo
    echo "Options:"
    echo "    $0 send FILE [PASSWORD]"
    echo "    $0 get URL [PASSWORD]"
    echo "    $0 delete URL"
    echo
    echo "Global variables to export:"
    echo "    JIRAFEAU_PROXY: Domain and port of proxy server, eg. »proxyserver.example.com:3128«"
    echo "    JIRAFEAU_URL : URI to Jirafeau installation with trailing slash, eg. »https://example.com/jirafeau/«"
    echo "    JIRAFEAU_TIME : expiration time, eg. »minute«, »hour«, »day«, »week«, fortnight, »month«, »quarter«, »year« or »none«"
    echo "    JIRAFEAU_ONE_TIME : self-destroy after first download, eg. »1« to enable or »« (empty) to disable"
    echo "    JIRAFEAU_CURL : alternative path to curl binary"
    echo "    JIRAFEAU_UPLOAD_PASSWD : upload password"

    exit 0
fi

if [ -n "$proxy" ]; then
    proxy="-x $proxy"
fi

options=''
if [ -n "$one_time" ]; then
    options="$options -F one_time_download=1"
fi

if [ -n "$upload_password" ]; then
    options="$options -F upload_password=$upload_password"
fi

password=''
if [ -n "$3" ]; then
    password="$3"
    options="$options -F key=$password"
fi

apipage='script.php'
downloadpage='f.php'

if [ "$1" == "send" ]; then
    if [ ! -f "$2" ]; then
        echo "File \"$2\" does not exist."
        exit
    fi

    # Ret result
    res=$($curl -X POST --http1.0 $proxy $options \
                  -F "time=$time" \
                  -F "file=@$2" \
                  $url$apipage)

    if [[ "$res" == Error* ]]; then
        echo "Error while uploading."
        echo $res
        exit
    fi

    # Not using head or tail to minimise command dependencies
    code=$(cnt=0; echo "$res" | while read l; do
        if [[ "$cnt" == "0" ]]; then
            echo "$l"
        fi
        cnt=$(( cnt + 1 ))
        done)
    del_code=$(cnt=0; echo "$res" | while read l; do
        if [[ "$cnt" == "1" ]]; then
            echo "$l"
        fi
        cnt=$(( cnt + 1 ))
        done)
    key_code=$(cnt=0; echo "$res" | while read l; do
        if [[ "$cnt" == "2" ]]; then
            echo "$l"
        fi
        cnt=$(( cnt + 1 ))
        done)

    echo
    echo "Download page:"
    if [[ $key_code ]]; then
        echo "    ${url}${downloadpage}?h=$code&k=$key_code"
    else
        echo "    ${url}${downloadpage}?h=$code"
    fi
    echo "Direct download:"
    if [[ $key_code ]]; then
        echo "    ${url}${downloadpage}?h=$code&k=$key_code&d=1"
    else
        echo "    ${url}${downloadpage}?h=$code&d=1"
    fi
    echo "Delete link:"
    echo "    ${url}${downloadpage}?h=$code&d=$del_code"
    echo
    echo "Download via API:"
    if [[ $key_code ]]; then
        echo "    ${0} get ${url}${apipage}?h=$code&k=$key_code [PASSWORD]"
    else
        echo "    ${0} get ${url}${apipage}?h=$code [PASSWORD]"
    fi
    echo "Delete via API:"
    echo "    ${0} delete \"${url}${downloadpage}?h=$code&d=$del_code\""

elif [ "$1" == "get" ]; then
    if [ -z "$password" ]; then
        $curl $proxy -OJ "$2"
    else
        $curl $proxy -OJ -X POST -F key=$password "$2"
    fi
elif [ "$1" == "delete" ]; then
    $curl $proxy "$2" --data-raw "do_delete=1%2F" | grep "div class" |sed -e "s/<[^>]\+>//g"
fi
<?php
    } else {
        echo 'Error 12';
        exit;
    }
}
/* Initialize an asynchronous upload. */
elseif (isset($_GET['init_async'])) {
    if (jirafeau_user_session_logged()) {
    } elseif (isset($_POST['upload_password'])) {
        if (!jirafeau_challenge_upload($cfg, get_ip_address($cfg), $_POST['upload_password'])) {
            echo 'Error 20: Invalid password';
            exit;
        }
    } else {
        if (!jirafeau_challenge_upload($cfg, get_ip_address($cfg), null)) {
            echo 'Error 19: No password nor allowed IP';
            exit;
        }
    }

    if (!isset($_POST['filename'])) {
        echo 'Error 21';
        exit;
    }

    $type = '';
    if (isset($_POST['type'])) {
        $type = $_POST['type'];
    }

    $key = '';
    if (isset($_POST['key'])) {
        $key = $_POST['key'];
        if ($cfg['download_password_requirement'] !== 'generated' && $cfg['download_password_policy'] === 'regex') {
            if (!preg_match($cfg['download_password_policy_regex'], $key)) {
                echo 'Error 14: The download password is not complying to the security standards.';
                exit;
            }
        }
    } elseif ($cfg['download_password_requirement'] !== 'optional') {
        echo 'Error 13: The parameter password is required.';
        exit;
    }

    // Check if one time download is enabled
    if (!$cfg['one_time_download'] && isset($_POST['one_time_download'])) {
        echo 'Error 26: One time download is disabled.';
        exit;
    }

    if (!isset($_POST['time']) || !$cfg['availabilities'][$_POST['time']]) {
        echo 'Error 22';
        exit;
    } else {
        $time = jirafeau_datestr_to_int($_POST['time']);
    }

    if ($cfg['store_uploader_ip']) {
        $ip = get_ip_address($cfg);
    } else {
        $ip = "";
    }

    echo jirafeau_async_init(
        $_POST['filename'],
        $type,
        isset($_POST['one_time_download']),
        $key,
        $time,
        $ip
    );
}
/* Continue an asynchronous upload. */
elseif (isset($_GET['push_async'])) {
    if ((!isset($_POST['ref']))
        || (!isset($_FILES['data']))
        || (!isset($_POST['code']))) {
        echo 'Error 23';
    } else {
        echo jirafeau_async_push(
            $_POST['ref'],
            $_FILES['data'],
            $_POST['code'],
            $cfg['maximal_upload_size']
        );
    }
}
/* Finalize an asynchronous upload. */
elseif (isset($_GET['end_async'])) {
    if (!isset($_POST['ref'])
        || !isset($_POST['code'])) {
        echo 'Error 24';
    } else {
        echo jirafeau_async_end($_POST['ref'], $_POST['code'], $cfg['enable_crypt'], $cfg['link_name_length'], $cfg['file_hash']);
    }
} else {
    echo 'Error 25';
}
exit;
?>
