8322 nl: misleading-indentation

[unleashed/tickless.git] / usr / src / cmd / cmd-inet / usr.lib / wanboot / wanboot-cgi / wanboot-cgi.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2012 Milan Jurik. All rights reserved.
 */

#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <netdb.h>
#include <libnvpair.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/sysmacros.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/utsname.h>
#include <sys/wanboot_impl.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <openssl/crypto.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
#include <openssl/evp.h>
#include <openssl/err.h>

#include <p12aux.h>

#include <parseURL.h>
/*
 * These can be replaced with wanbootutil.h once the openssl interfaces
 * are moved to libwanboot.
 */
#include <wanboot/key_util.h>
#include <wanboot/key_xdr.h>
#include <hmac_sha1.h>

#include <netboot_paths.h>
#include <wanboot_conf.h>

/*
 * Exit status:
 */
#define WBCGI_STATUS_OK         0
#define WBCGI_STATUS_ERR        1

#define WBCGI_FILE_EXISTS(file, statbuf) \
        (stat(file, &statbuf) == 0 && S_ISREG(statbuf.st_mode))

#define WBCGI_DIR_EXISTS(dir, statbuf) \
        (stat(dir, &statbuf) == 0 && S_ISDIR(statbuf.st_mode))

#define WBCGI_HMAC_PATH         "/usr/lib/inet/wanboot/hmac"
#define WBCGI_ENCR_PATH         "/usr/lib/inet/wanboot/encr"
#define WBCGI_KEYMGMT_PATH      "/usr/lib/inet/wanboot/keymgmt"
#define WBCGI_MKISOFS_PATH      "/bin/mkisofs"

#define WBCGI_DEV_URANDOM       "/dev/urandom"

#define WBCGI_CONTENT_TYPE      "Content-Type: "
#define WBCGI_CONTENT_LENGTH    "Content-Length: "
#define WBCGI_WANBOOT_BNDTXT    "WANBoot_Part_Boundary"
#define WBCGI_CRNL              "\r\n"

#define WBCGI_CNSTR             "CN="
#define WBCGI_CNSTR_LEN         (sizeof (WBCGI_CNSTR) - 1)
#define WBCGI_NAMESEP           ",/\n\r"

#define WBCGI_MAXBUF            256

/*
 * Possible return values from netboot_ftw():
 */
#define WBCGI_FTW_CBOK          2       /* CB terminated walk OK */
#define WBCGI_FTW_CBCONT        1       /* CB wants walk should continue */
#define WBCGI_FTW_DONE          0       /* Walk terminated without CBERR/CBOK */
#define WBCGI_FTW_CBERR         -1      /* CB terminated walk with err */

/*
 * getsubopt() is used to map one of the contents[] keywords
 * to one of these types
 */
#define WBCGI_CONTENT_ERROR     -1
#define WBCGI_CONTENT_BOOTFILE  0
#define WBCGI_CONTENT_BOOTFS    1
#define WBCGI_CONTENT_ROOTFS    2

static char *contents[] =
        { "bootfile", "bootfs", "rootfs", NULL };

/*
 * getsubopt() is used to parse the query string for
 * the keywords defined by queryopts[]
 */
#define WBCGI_QUERYOPT_CONTENT  0
#define WBCGI_QUERYOPT_NET      1
#define WBCGI_QUERYOPT_CID      2
#define WBCGI_QUERYOPT_NONCE    3

static char *queryopts[] =
        { "CONTENT", "IP", "CID", "NONCE", NULL };

static bc_handle_t      bc_handle;


static char *
status_msg(int status)
{
        char    *msg;

        switch (status) {
        case 400:
                msg = "Bad Request";
                break;
        case 403:
                msg = "Forbidden";
                break;
        case 500:
                msg = "Internal Server Error";
                break;
        default:
                msg = "Unknown status";
                break;
        }

        return (msg);
}

static void
print_status(int status, const char *spec_msg)
{
        if (spec_msg == NULL) {
                spec_msg = "";
        }

        (void) fprintf(stdout, "Status: %d %s %s%s", status,
            status_msg(status), spec_msg, WBCGI_CRNL);
}

static char *
make_path(const char *root, const char *suffix)
{
        char    path[MAXPATHLEN];
        char    *ptr = NULL;
        int     chars;

        if ((chars = snprintf(path, sizeof (path),
            "%s/%s", root, suffix)) < 0 || chars > sizeof (path) ||
            (ptr = strdup(path)) == NULL) {
                print_status(500, "(error making path)");
        }

        return (ptr);
}

static void
free_path(char **pathp)
{
        if (*pathp != NULL) {
                free(*pathp);
                *pathp = NULL;
        }
}

static char *
gen_tmppath(const char *prefix, const char *net, const char *cid)
{
        pid_t   pid;
        time_t  secs;
        int     chars;
        char    path[MAXPATHLEN];
        char    *ptr = NULL;

        if ((pid = getpid()) < 0 || (secs = time(NULL)) < 0 ||
            (chars = snprintf(path, sizeof (path), "/tmp/%s_%s_%s_%ld_%ld",
            prefix, net, cid, pid, secs)) < 0 || chars > sizeof (path) ||
            (ptr = strdup(path)) == NULL) {
                print_status(500, "(error creating temporary filename)");
        }

        return (ptr);
}

/*
 * File I/O stuff:
 */
static boolean_t
write_buffer(int fd, const void *buffer, size_t buflen)
{
        size_t          nwritten;
        ssize_t         nbytes;
        const char      *buf = buffer;

        for (nwritten = 0; nwritten < buflen; nwritten += nbytes) {
                nbytes = write(fd, &buf[nwritten], buflen - nwritten);
                if (nbytes <= 0) {
                        return (B_FALSE);
                }
        }

        return (B_TRUE);
}

static boolean_t
write_file(int ofd, const char *filename, size_t size)
{
        boolean_t       ret = B_TRUE;
        int             ifd;
        char            buf[1024];
        size_t          rlen;
        ssize_t         wlen;

        if ((ifd = open(filename, O_RDONLY)) < 0) {
                return (B_FALSE);
        }

        for (; size != 0; size -= wlen) {
                rlen = (size < sizeof (buf)) ? size : sizeof (buf);

                if ((wlen = read(ifd, buf, rlen)) < 0 ||
                    !write_buffer(ofd, buf, wlen)) {
                        ret = B_FALSE;
                        break;
                }
        }
        (void) close(ifd);

        return (ret);
}

static boolean_t
copy_file(const char *src, const char *dest)
{
        boolean_t       ret = B_FALSE;
        char            message[WBCGI_MAXBUF];
        const size_t    chunksize = 16 * PAGESIZE;
        size_t          validsize;
        size_t          nwritten = 0;
        size_t          nbytes = 0;
        off_t           roff;
        int             mflags = MAP_PRIVATE;
        char            *buf = NULL;
        struct stat     st;
        int             rfd = -1;
        int             wfd = -1;
        int             chars;

        if ((rfd = open(src, O_RDONLY)) < 0 ||
            (wfd = open(dest, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR)) < 0 ||
            fstat(rfd, &st) == -1) {
                goto cleanup;
        }

        for (nbytes = st.st_size, roff = 0; nwritten < nbytes;
            nwritten += validsize, roff += validsize) {
                buf = mmap(buf, chunksize, PROT_READ, mflags, rfd, roff);
                if (buf == MAP_FAILED) {
                        goto cleanup;
                }
                mflags |= MAP_FIXED;

                validsize = MIN(chunksize, nbytes - nwritten);
                if (!write_buffer(wfd, buf, validsize)) {
                        (void) munmap(buf, chunksize);
                        goto cleanup;
                }

        }
        if (buf != NULL) {
                (void) munmap(buf, chunksize);
        }

        ret = B_TRUE;
cleanup:
        if (ret == B_FALSE) {
                if ((chars = snprintf(message, sizeof (message),
                    "error copying %s to %s", src, dest)) > 0 &&
                    chars <= sizeof (message)) {
                        print_status(500, message);
                } else {
                        print_status(500, NULL);
                }
        }
        if (rfd != -1) {
                (void) close(rfd);
        }
        if (wfd != -1) {
                (void) close(wfd);
        }

        return (ret);
}

static boolean_t
create_nonce(const char *noncepath, const char *nonce)
{
        boolean_t       ret = B_TRUE;
        int             fd;

        if ((fd = open(noncepath,
            O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR)) == -1 ||
            !write_buffer(fd, nonce, strlen(nonce))) {
                print_status(500, "(error creating nonce file)");
                ret = B_FALSE;
        }
        if (fd != -1) {
                (void) close(fd);
        }

        return (ret);
}

static boolean_t
create_timestamp(const char *timestamppath, const char *timestamp)
{
        boolean_t       ret = B_TRUE;
        int             fd;

        if ((fd = open(timestamppath,
            O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR)) == -1 ||
            !write_buffer(fd, timestamp, strlen(timestamp))) {
                print_status(500, "(error creating timestamp file)");
                ret = B_FALSE;
        }
        if (fd != -1) {
                (void) close(fd);
        }

        return (ret);
}

static boolean_t
create_urandom(const char *urandompath)
{
        boolean_t       ret = B_TRUE;
        int             fd;

        if ((fd = open(urandompath,
            O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR)) == -1 ||
            !write_file(fd, WBCGI_DEV_URANDOM, 32 * 1024)) {
                print_status(500, "(error creating urandom file)");
                ret = B_FALSE;
        }
        if (fd != -1) {
                (void) close(fd);
        }

        return (ret);
}

static boolean_t
create_null_hash(const char *hashpath)
{
        boolean_t       ret = B_TRUE;
        int             fd;
        static char     null_hash[HMAC_DIGEST_LEN];

        if ((fd = open(hashpath,
            O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR)) == -1 ||
            !write_buffer(fd, null_hash, sizeof (null_hash))) {
                print_status(500, "(error creating null hash)");
                ret = B_FALSE;
        }
        if (fd != -1) {
                (void) close(fd);
        }

        return (ret);
}


static char *
determine_doc_root(void)
{
        char    *doc_root;

        /*
         * If DOCUMENT_ROOT is valid, use that.
         */
        if ((doc_root = getenv("DOCUMENT_ROOT")) == NULL ||
            strlen(doc_root) == 0) {
                /*
                 * No DOCUMENT_ROOT - try PATH_TRANSLATED.
                 */
                if ((doc_root = getenv("PATH_TRANSLATED")) == NULL ||
                    strlen(doc_root) == 0) {
                        /*
                         * Can't determine the document root.
                         */
                        return (NULL);
                }
        }

        return (doc_root);
}

static boolean_t
get_request_info(int *contentp, char **netp, char **cidp, char **noncep,
    char **docrootp)
{
        char    *method;
        char    *query_string;
        char    *value;
        char    *junk;
        int     i;

        if ((method = getenv("REQUEST_METHOD")) == NULL ||
            strncasecmp(method, "GET", strlen("GET") != 0)) {
                print_status(403, "(GET method expected)");
                return (B_FALSE);
        }

        if ((query_string = getenv("QUERY_STRING")) == NULL) {
                print_status(400, "(empty query string)");
                return (B_FALSE);
        }

        for (i = 0; i < strlen(query_string); i++) {
                if (query_string[i] == '&') {
                        query_string[i] = ',';
                }
        }

        *contentp = WBCGI_CONTENT_ERROR;
        *netp = *cidp = *noncep = NULL;

        if ((*docrootp = determine_doc_root()) == NULL) {
                print_status(400, "(unable to determine document root)");
                return (B_FALSE);
        }

        while (*query_string != '\0') {
                switch (getsubopt(&query_string, queryopts, &value)) {
                case WBCGI_QUERYOPT_CONTENT:
                        *contentp = getsubopt(&value, contents, &junk);
                        break;
                case WBCGI_QUERYOPT_NET:
                        *netp = value;
                        break;
                case WBCGI_QUERYOPT_CID:
                        *cidp = value;
                        break;
                case WBCGI_QUERYOPT_NONCE:
                        *noncep = value;
                        break;
                default:
                        print_status(400, "(illegal query string)");
                        return (B_FALSE);
                }
        }

        switch (*contentp) {
        default:
                print_status(400, "(missing or illegal CONTENT)");
                return (B_FALSE);

        case WBCGI_CONTENT_BOOTFS:
                if (*netp == NULL || *cidp == NULL || *noncep == NULL) {
                        print_status(400,
                            "(CONTENT, IP, CID and NONCE required)");
                        return (B_FALSE);
                }
                break;

        case WBCGI_CONTENT_BOOTFILE:
        case WBCGI_CONTENT_ROOTFS:
                if (*netp == NULL || *cidp == NULL || *docrootp == NULL) {
                        print_status(400,
                            "(CONTENT, IP, CID and DOCUMENT_ROOT required)");
                        return (B_FALSE);
                }
                break;
        }

        return (B_TRUE);
}

static boolean_t
encrypt_payload(const char *payload, const char *encr_payload,
    const char *keyfile, const char *encryption_type)
{
        struct stat     sbuf;
        int             chars;
        char            cmd[MAXPATHLEN];
        FILE            *fp;
        int             status;
        char            msg[WBCGI_MAXBUF];

        if (!WBCGI_FILE_EXISTS(payload, sbuf)) {
                print_status(500, "(encrypt_payload: missing payload)");
                return (B_FALSE);
        }

        if ((chars = snprintf(cmd, sizeof (cmd),
            "%s -o type=%s -k %s < %s > %s", WBCGI_ENCR_PATH,
            encryption_type, keyfile, payload, encr_payload)) < 0 ||
            chars > sizeof (cmd)) {
                print_status(500, "(encrypt_payload: buffer overflow)");
                return (B_FALSE);
        }

        if ((fp = popen(cmd, "w")) == NULL) {
                print_status(500, "(encrypt_payload: missing/file error)");
                return (B_FALSE);
        }
        if ((status = WEXITSTATUS(pclose(fp))) != 0) {
                (void) snprintf(msg, sizeof (msg),
                    "(encrypt_payload: failed, status=%d)", status);
                print_status(500, msg);
                return (B_FALSE);
        }

        if (!WBCGI_FILE_EXISTS(encr_payload, sbuf)) {
                print_status(500, "(encrypt_payload: bad encrypted file)");
                return (B_FALSE);
        }

        return (B_TRUE);
}

static boolean_t
hash_payload(const char *payload, const char *payload_hash,
    const char *keyfile)
{
        struct stat     sbuf;
        int             chars;
        char            cmd[MAXPATHLEN];
        FILE            *fp;
        int             status;
        char            msg[WBCGI_MAXBUF];

        if (!WBCGI_FILE_EXISTS(payload, sbuf)) {
                print_status(500, "(hash_payload: missing payload)");
                return (B_FALSE);
        }

        if ((chars = snprintf(cmd, sizeof (cmd), "%s -i %s -k %s > %s",
            WBCGI_HMAC_PATH, payload, keyfile, payload_hash)) < 0 ||
            chars > sizeof (cmd)) {
                print_status(500, "(hash_payload: buffer overflow)");
                return (B_FALSE);
        }

        if ((fp = popen(cmd, "w")) == NULL) {
                print_status(500, "(hash_payload: missing/file error)");
                return (B_FALSE);
        }
        if ((status = WEXITSTATUS(pclose(fp))) != 0) {
                (void) snprintf(msg, sizeof (msg),
                    "(hash_payload: failed, status=%d)", status);
                print_status(500, msg);
                return (B_FALSE);
        }

        if (!WBCGI_FILE_EXISTS(payload_hash, sbuf) ||
            sbuf.st_size < HMAC_DIGEST_LEN) {
                print_status(500, "(hash_payload: bad signature file)");
                return (B_FALSE);
        }

        return (B_TRUE);
}

static boolean_t
extract_keystore(const char *path, const char *keystorepath)
{
        struct stat     sbuf;
        int             chars;
        char            cmd[MAXPATHLEN];
        FILE            *fp;
        int             status;
        char            msg[WBCGI_MAXBUF];

        if (!WBCGI_FILE_EXISTS(path, sbuf)) {
                print_status(500, "(extract_keystore: missing keystore)");
                return (B_FALSE);
        }

        if ((chars = snprintf(cmd, sizeof (cmd),
            "%s -x -f %s -s %s -o type=rsa",
            WBCGI_KEYMGMT_PATH, keystorepath, path)) < 0 ||
            chars > sizeof (cmd)) {
                print_status(500, "(extract_keystore: buffer overflow)");
                return (B_FALSE);
        }

        if ((fp = popen(cmd, "w")) == NULL) {
                print_status(500, "(extract_keystore: missing/file error)");
                return (B_FALSE);
        }
        if ((status = WEXITSTATUS(pclose(fp))) != 0) {
                (void) snprintf(msg, sizeof (msg),
                    "(extract_keystore: failed, status=%d)", status);
                print_status(500, msg);
                return (B_FALSE);
        }

        if (!WBCGI_FILE_EXISTS(keystorepath, sbuf)) {
                print_status(500, "(extract_keystore: failed to create)");
                return (B_FALSE);
        }

        return (B_TRUE);
}

static boolean_t
mkisofs(const char *image_dir, const char *image)
{
        struct stat     sbuf;
        int             chars;
        char            cmd[MAXPATHLEN];
        FILE            *fp;
        int             status;
        char            msg[WBCGI_MAXBUF];

        if (!WBCGI_DIR_EXISTS(image_dir, sbuf)) {
                print_status(500, "(mksiofs: missing image_dir)");
                return (B_FALSE);
        }

        if ((chars = snprintf(cmd, sizeof (cmd), "%s -quiet -o %s -r %s",
            WBCGI_MKISOFS_PATH, image, image_dir)) < 0 ||
            chars > sizeof (cmd)) {
                print_status(500, "(mkisofs: buffer overflow)");
                return (B_FALSE);
        }

        if ((fp = popen(cmd, "w")) == NULL) {
                print_status(500, "(mkisofs: missing/file error)");
                return (B_FALSE);
        }
        if ((status = WEXITSTATUS(pclose(fp))) != 0) {
                (void) snprintf(msg, sizeof (msg),
                    "(mkisofs: failed, status=%d)", status);
                print_status(500, msg);
                return (B_FALSE);
        }

        if (!WBCGI_FILE_EXISTS(image, sbuf)) {
                print_status(500, "(mksiofs: failed to create image)");
                return (B_FALSE);
        }

        return (B_TRUE);
}

/*
 * This function, when invoked with a file name, optional network and
 * client ID strings, and callback function will search for the file
 * in the following locations:
 *
 * NB_NETBOOT_ROOT/<network>/<client id>/<file>
 * NB_NETBOOT_ROOT/<client id>/<file>
 * NB_NETBOOT_ROOT/<network>/<file>
 * NB_NETBOOT_ROOT/<file>
 *
 * The callback function is invoked each time the file is found until
 * we have searched all of the above locations or the callback function
 * returns a value other than WBCGI_FTW_CBCONT.
 *
 * Arguments:
 *      filename - Name of file to search for.
 *      net      - Optional network number to include in search hierarchy.
 *      cid      - Optional client ID to include in search hierarchy.
 *      cb       - Callback function to be called when file is found.
 *      arg      - Argument to be supplied to the callback funtion.
 *
 * Returns:
 *      WBCGI_FTW_DONE, WBCGI_FTW_CBOK or WBCGI_FTW_CBERR.
 */
static int
netboot_ftw(const char *filename, const char *net, const char *cid,
    int (*cb)(const char *, void *arg), void *arg)
{
        char            ckpath[4][MAXPATHLEN];
        int             ret;
        struct          stat buf;
        int             i = 0;

        if (snprintf(ckpath[i++], MAXPATHLEN, "%s%s", NB_NETBOOT_ROOT, filename)
            >= MAXPATHLEN)
                return (WBCGI_FTW_CBERR);

        if (net != NULL && snprintf(ckpath[i++], MAXPATHLEN, "%s%s/%s",
            NB_NETBOOT_ROOT, net, filename) >= MAXPATHLEN)
                return (WBCGI_FTW_CBERR);

        if (cid != NULL) {
                if (snprintf(ckpath[i++], MAXPATHLEN, "%s%s/%s",
                    NB_NETBOOT_ROOT, cid, filename) >= MAXPATHLEN)
                        return (WBCGI_FTW_CBERR);

                if (net != NULL && snprintf(ckpath[i++], MAXPATHLEN,
                    "%s%s/%s/%s", NB_NETBOOT_ROOT, net, cid, filename) >=
                    MAXPATHLEN)
                        return (WBCGI_FTW_CBERR);
        }

        /*
         * Loop through hierarchy and check for file existence.
         */
        while (i > 0) {
                --i;
                if (WBCGI_FILE_EXISTS(ckpath[i], buf)) {
                        if ((ret = cb(ckpath[i], arg)) != WBCGI_FTW_CBCONT)
                                return (ret);
                }
        }
        return (WBCGI_FTW_DONE);
}

/*ARGSUSED*/
static int
noact_cb(const char *path, void *arg)
{
        return (WBCGI_FTW_CBOK);
}

static int
set_pathname(const char *path, void *pathname)
{
        *(char **)pathname = strdup((char *)path);
        return (WBCGI_FTW_CBOK);
}

static int
create_keystore(const char *path, void *keystorepath)
{
        if (!extract_keystore(path, (char *)keystorepath)) {
                return (WBCGI_FTW_CBERR);
        }
        return (WBCGI_FTW_CBOK);
}

static int
copy_certstore(const char *path, void *certstorepath)
{
        if (!copy_file(path, (char *)certstorepath)) {
                return (WBCGI_FTW_CBERR);
        }
        return (WBCGI_FTW_CBOK);
}

/*
 * Add the certs found in the trustfile found in path (a trust store) to
 * the file found at bootfs_dir/truststore.  If necessary, create the
 * output file.
 */
static int
build_trustfile(const char *path, void *truststorepath)
{
        int             ret = WBCGI_FTW_CBERR;
        STACK_OF(X509)  *i_anchors = NULL;
        STACK_OF(X509)  *o_anchors = NULL;
        char            message[WBCGI_MAXBUF];
        PKCS12          *p12 = NULL;
        FILE            *rfp = NULL;
        FILE            *wfp = NULL;
        struct stat     i_st;
        struct stat     o_st;
        X509            *x = NULL;
        int             errtype = 0;
        int             wfd = -1;
        int             chars;
        int             i;

        if (!WBCGI_FILE_EXISTS(path, i_st)) {
                goto cleanup;
        }

        if (WBCGI_FILE_EXISTS((char *)truststorepath, o_st)) {
                /*
                 * If we are inadvertantly writing to the input file.
                 * return success.
                 * XXX Pete: how can this happen, and why success?
                 */
                if (i_st.st_ino == o_st.st_ino) {
                        ret = WBCGI_FTW_CBCONT;
                        goto cleanup;
                }
                if ((wfp = fopen((char *)truststorepath, "r+")) == NULL) {
                        goto cleanup;
                }
                /*
                 * Read what's already there, so that new information
                 * can be added.
                 */
                if ((p12 = d2i_PKCS12_fp(wfp, NULL)) == NULL) {
                        errtype = 1;
                        goto cleanup;
                }
                i = sunw_PKCS12_parse(p12, WANBOOT_PASSPHRASE, DO_NONE, NULL,
                    0, NULL, NULL, NULL, &o_anchors);
                if (i <= 0) {
                        errtype = 1;
                        goto cleanup;
                }

                PKCS12_free(p12);
                p12 = NULL;
        } else {
                if (errno != ENOENT) {
                        chars = snprintf(message, sizeof (message),
                            "(error accessing file %s, error %s)",
                            path, strerror(errno));
                        if (chars > 0 && chars < sizeof (message))
                                print_status(500, message);
                        else
                                print_status(500, NULL);
                        return (WBCGI_FTW_CBERR);
                }

                /*
                 * Note: We could copy the file to the new trustfile, but
                 * we can't verify the password that way.  Therefore, copy
                 * it by reading it.
                 */
                if ((wfd = open((char *)truststorepath,
                    O_CREAT|O_EXCL|O_RDWR, 0700)) < 0) {
                        goto cleanup;
                }
                if ((wfp = fdopen(wfd, "w+")) == NULL) {
                        goto cleanup;
                }
                o_anchors = sk_X509_new_null();
                if (o_anchors == NULL) {
                        goto cleanup;
                }
        }

        if ((rfp = fopen(path, "r")) == NULL) {
                goto cleanup;
        }
        if ((p12 = d2i_PKCS12_fp(rfp, NULL)) == NULL) {
                errtype = 1;
                goto cleanup;
        }
        i = sunw_PKCS12_parse(p12, WANBOOT_PASSPHRASE, DO_NONE, NULL, 0, NULL,
            NULL, NULL, &i_anchors);
        if (i <= 0) {
                errtype = 1;
                goto cleanup;
        }
        PKCS12_free(p12);
        p12 = NULL;

        /*
         * Merge the two stacks of pkcs12 certs.
         */
        for (i = 0; i < sk_X509_num(i_anchors); i++) {
                /* LINTED */
                x = sk_X509_delete(i_anchors, i);
                (void) sk_X509_push(o_anchors, x);
        }

        /*
         * Create the pkcs12 structure from the modified input stack and
         * then write out that structure.
         */
        p12 = sunw_PKCS12_create((const char *)WANBOOT_PASSPHRASE, NULL, NULL,
            o_anchors);
        if (p12 == NULL) {
                goto cleanup;
        }
        rewind(wfp);
        if (i2d_PKCS12_fp(wfp, p12) == 0) {
                goto cleanup;
        }

        ret = WBCGI_FTW_CBCONT;
cleanup:
        if (ret == WBCGI_FTW_CBERR) {
                if (errtype == 1) {
                        chars = snprintf(message, sizeof (message),
                            "(internal PKCS12 error while copying %s to %s)",
                            path, (char *)truststorepath);
                } else {
                        chars = snprintf(message, sizeof (message),
                            "(error copying %s to %s)",
                            path, (char *)truststorepath);
                }
                if (chars > 0 && chars <= sizeof (message)) {
                        print_status(500, message);
                } else {
                        print_status(500, NULL);
                }
        }
        if (rfp != NULL) {
                (void) fclose(rfp);
        }
        if (wfp != NULL) {
                /* Will also close wfd */
                (void) fclose(wfp);
        }
        if (p12 != NULL) {
                PKCS12_free(p12);
        }
        if (i_anchors != NULL) {
                sk_X509_pop_free(i_anchors, X509_free);
        }
        if (o_anchors != NULL) {
                sk_X509_pop_free(o_anchors, X509_free);
        }

        return (ret);
}

static boolean_t
check_key_type(const char *keyfile, const char *keytype, int flag)
{
        boolean_t       ret = B_FALSE;
        FILE            *key_fp = NULL;
        wbku_key_attr_t ka;

        /*
         * Map keytype into the ka structure
         */
        if (wbku_str_to_keyattr(keytype, &ka, flag) != WBKU_SUCCESS) {
                goto cleanup;
        }

        /*
         * Open the key file for reading.
         */
        if ((key_fp = fopen(keyfile, "r")) == NULL) {
                goto cleanup;
        }

        /*
         * Find the valid client key, if it exists.
         */
        if (wbku_find_key(key_fp, NULL, &ka, NULL, B_FALSE) != WBKU_SUCCESS) {
                goto cleanup;
        }

        ret = B_TRUE;
cleanup:
        if (key_fp != NULL) {
                (void) fclose(key_fp);
        }

        return (ret);
}

static boolean_t
resolve_hostname(const char *hostname, nvlist_t *nvl, boolean_t may_be_crap)
{
        struct sockaddr_in      sin;
        struct hostent          *hp;
        struct utsname          un;
        static char             myname[SYS_NMLN] = { '\0' };
        char                    *cp = NULL;
        char                    msg[WBCGI_MAXBUF];

        /*
         *  Initialize cached nodename
         */
        if (strlen(myname) == 0) {
                if (uname(&un) == -1) {
                        (void) snprintf(msg, sizeof (msg),
                            "(unable to retrieve uname, errno %d)", errno);
                        print_status(500, msg);
                        return (B_FALSE);
                }
                (void) strcpy(myname, un.nodename);
        }

        /*
         * If hostname is local node name, return the address this
         * request came in on, which is supplied as SERVER_ADDR in the
         * cgi environment.  This ensures we don't send back a possible
         * alternate address that may be unreachable from the client's
         * network.  Otherwise, just resolve with nameservice.
         */
        if ((strcmp(hostname, myname) != 0) ||
            ((cp = getenv("SERVER_ADDR")) == NULL)) {
                if (((hp = gethostbyname(hostname)) == NULL) ||
                    (hp->h_addrtype != AF_INET) ||
                    (hp->h_length != sizeof (struct in_addr))) {
                        if (!may_be_crap) {
                                print_status(500, "(error resolving hostname)");
                        }
                        return (may_be_crap);
                }
                (void) memcpy(&sin.sin_addr, hp->h_addr, hp->h_length);
                cp = inet_ntoa(sin.sin_addr);
        }

        if (nvlist_add_string(nvl, (char *)hostname, cp) != 0) {
                print_status(500, "(error adding hostname to nvlist)");
                return (B_FALSE);
        }

        return (B_TRUE);
}

/*
 * one_name() is called for each certificate found and is passed the string
 * that X509_NAME_oneline() returns.  Its job is to find the common name and
 * determine whether it is a host name; if it is then a line suitable for
 * inclusion in /etc/inet/hosts is written to that file.
 */
static boolean_t
one_name(const char *namestr, nvlist_t *nvl)
{
        boolean_t       ret = B_TRUE;
        char            *p;
        char            *q;
        char            c;

        if (namestr != NULL &&
            (p = strstr(namestr, WBCGI_CNSTR)) != NULL) {
                p += WBCGI_CNSTR_LEN;

                if ((q = strpbrk(p, WBCGI_NAMESEP)) != NULL) {
                        c = *q;
                        *q = '\0';
                        ret = resolve_hostname(p, nvl, B_TRUE);
                        *q = c;
                } else {
                        ret = resolve_hostname(p, nvl, B_TRUE);
                }
        }

        return (ret);
}

/*
 * Loop through the certificates in a file
 */
static int
get_hostnames(const char *path, void *nvl)
{
        int             ret = WBCGI_FTW_CBERR;
        STACK_OF(X509)  *certs = NULL;
        PKCS12          *p12 = NULL;
        char            message[WBCGI_MAXBUF];
        char            buf[WBCGI_MAXBUF + 1];
        FILE            *rfp = NULL;
        X509            *x = NULL;
        int             errtype = 0;
        int             chars;
        int             i;

        if ((rfp = fopen(path, "r")) == NULL) {
                goto cleanup;
        }

        if ((p12 = d2i_PKCS12_fp(rfp, NULL)) == NULL) {
                errtype = 1;
                goto cleanup;
        }
        i = sunw_PKCS12_parse(p12, WANBOOT_PASSPHRASE, DO_NONE, NULL, 0, NULL,
            NULL, NULL, &certs);
        if (i <= 0) {
                errtype = 1;
                goto cleanup;
        }

        PKCS12_free(p12);
        p12 = NULL;

        for (i = 0; i < sk_X509_num(certs); i++) {
                /* LINTED */
                x = sk_X509_value(certs, i);
                if (!one_name(sunw_issuer_attrs(x, buf, sizeof (buf) - 1),
                    nvl)) {
                        goto cleanup;
                }
        }

        ret = WBCGI_FTW_CBCONT;
cleanup:
        if (ret == WBCGI_FTW_CBERR) {
                if (errtype == 1) {
                        chars = snprintf(message, sizeof (message),
                            "(internal PKCS12 error reading %s)", path);
                } else {
                        chars = snprintf(message, sizeof (message),
                            "error reading %s", path);
                }
                if (chars > 0 && chars <= sizeof (message)) {
                        print_status(500, message);
                } else {
                        print_status(500, NULL);
                }
        }
        if (rfp != NULL) {
                (void) fclose(rfp);
        }
        if (p12 != NULL) {
                PKCS12_free(p12);
        }
        if (certs != NULL) {
                sk_X509_pop_free(certs, X509_free);
        }

        return (ret);
}

/*
 * Create a hosts file by extracting hosts from client and truststore
 * files.  Use the CN. Then we should copy that file to the inet dir.
 */
static boolean_t
create_hostsfile(const char *hostsfile, const char *net, const char *cid)
{
        boolean_t       ret = B_FALSE;
        nvlist_t        *nvl;
        nvpair_t        *nvp;
        FILE            *hostfp = NULL;
        int             hostfd = -1;
        int             i;
        char            *hostslist;
        const char      *bc_urls[] = { BC_ROOT_SERVER, BC_BOOT_LOGGER, NULL };

        /*
         * Allocate nvlist handle to store our hostname/IP pairs.
         */
        if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
                print_status(500, "(error allocating hostname nvlist)");
                goto cleanup;
        }

        /*
         * Extract and resolve hostnames from CNs.
         */
        if (netboot_ftw(NB_CLIENT_CERT, net, cid,
            get_hostnames, nvl) == WBCGI_FTW_CBERR ||
            netboot_ftw(NB_CA_CERT, net, cid,
            get_hostnames, nvl) == WBCGI_FTW_CBERR) {
                goto cleanup;
        }

        /*
         * Extract and resolve hostnames from any URLs in bootconf.
         */
        for (i = 0; bc_urls[i] != NULL; ++i) {
                char    *urlstr;
                url_t   url;

                if ((urlstr = bootconf_get(&bc_handle, bc_urls[i])) != NULL &&
                    url_parse(urlstr, &url) == URL_PARSE_SUCCESS) {
                        if (!resolve_hostname(url.hport.hostname,
                            nvl, B_FALSE)) {
                                goto cleanup;
                        }
                }
        }

        /*
         * If there is a resolve-hosts list in bootconf, resolve those
         * hostnames too.
         */
        if ((hostslist = bootconf_get(&bc_handle, BC_RESOLVE_HOSTS)) != NULL) {
                char    *hostname;

                for (hostname = strtok(hostslist, ","); hostname != NULL;
                    hostname = strtok(NULL, ",")) {
                        if (!resolve_hostname(hostname, nvl, B_FALSE)) {
                                goto cleanup;
                        }
                }
        }

        /*
         * Now write the hostname/IP pairs gathered to the hosts file.
         */
        if ((hostfd = open(hostsfile,
            O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR)) == -1 ||
            (hostfp = fdopen(hostfd, "w+")) == NULL) {
                print_status(500, "(error creating hosts file)");
                goto cleanup;
        }
        for (nvp = nvlist_next_nvpair(nvl, NULL); nvp != NULL;
            nvp = nvlist_next_nvpair(nvl, nvp)) {
                char    *hostname;
                char    *ipstr;

                hostname = nvpair_name(nvp);
                if (nvpair_value_string(nvp, &ipstr) != 0) {
                        print_status(500, "(nvl error writing hosts file)");
                        goto cleanup;
                }

                if (fprintf(hostfp, "%s\t%s\n", ipstr, hostname) < 0) {
                        print_status(500, "(error writing hosts file)");
                        goto cleanup;
                }
        }

        ret = B_TRUE;
cleanup:
        if (nvl != NULL) {
                nvlist_free(nvl);
        }
        if (hostfp != NULL) {
                /*
                 * hostfd is automatically closed as well.
                 */
                (void) fclose(hostfp);
        }

        return (ret);
}

static boolean_t
bootfile_payload(const char *docroot, char **bootpathp)
{
        boolean_t       ret = B_FALSE;
        char            *boot_file;
        struct stat     sbuf;

        if ((boot_file = bootconf_get(&bc_handle, BC_BOOT_FILE)) == NULL) {
                print_status(500, "(boot_file must be specified)");
                goto cleanup;
        }
        if ((*bootpathp = make_path(docroot, boot_file)) == NULL) {
                goto cleanup;
        }
        if (!WBCGI_FILE_EXISTS(*bootpathp, sbuf)) {
                print_status(500, "(boot_file missing)");
                goto cleanup;
        }

        ret = B_TRUE;
cleanup:
        return (ret);
}

/*
 * Create the wanboot file system whose contents are determined by the
 * security configuration specified in bootconf.
 */
static boolean_t
wanbootfs_payload(const char *net, const char *cid, const char *nonce,
    const char *bootconf, char **wanbootfs_imagep)
{
        int             ret = B_FALSE;

        char            *server_authentication;
        char            *client_authentication;
        char            *scf;

        char            *bootfs_dir = NULL;
        char            *bootfs_etc_dir = NULL;
        char            *bootfs_etc_inet_dir = NULL;
        char            *bootfs_dev_dir = NULL;

        char            *systemconf = NULL;
        char            *keystorepath = NULL;
        char            *certstorepath = NULL;
        char            *truststorepath = NULL;
        char            *bootconfpath = NULL;
        char            *systemconfpath = NULL;
        char            *urandompath = NULL;
        char            *noncepath = NULL;
        char            *hostspath = NULL;
        char            *etc_hostspath = NULL;
        char            *timestamppath = NULL;

        boolean_t       authenticate_client;
        boolean_t       authenticate_server;

        struct stat     sbuf;

        /*
         * Initialize SSL stuff.
         */
        sunw_crypto_init();

        /*
         * Get the security strategy values.
         */
        client_authentication = bootconf_get(&bc_handle,
            BC_CLIENT_AUTHENTICATION);
        authenticate_client = (client_authentication != NULL &&
            strcmp(client_authentication, "yes") == 0);
        server_authentication = bootconf_get(&bc_handle,
            BC_SERVER_AUTHENTICATION);
        authenticate_server = (server_authentication != NULL &&
            strcmp(server_authentication, "yes") == 0);

        /*
         * Make a temporary directory structure for the wanboot file system.
         */
        if ((bootfs_dir = gen_tmppath("bootfs_dir", net, cid)) == NULL ||
            (bootfs_etc_dir = make_path(bootfs_dir, "etc")) == NULL ||
            (bootfs_etc_inet_dir = make_path(bootfs_etc_dir, "inet")) == NULL ||
            (bootfs_dev_dir = make_path(bootfs_dir, "dev")) == NULL) {
                goto cleanup;
        }
        if (mkdirp(bootfs_dir, 0700) ||
            mkdirp(bootfs_etc_dir, 0700) ||
            mkdirp(bootfs_etc_inet_dir, 0700) ||
            mkdirp(bootfs_dev_dir, 0700)) {
                print_status(500, "(error creating wanbootfs dir structure)");
                goto cleanup;
        }

        if (authenticate_client) {
                /*
                 * Add the client private key.
                 */
                if ((keystorepath = make_path(bootfs_dir,
                    NB_CLIENT_KEY)) == NULL ||
                    netboot_ftw(NB_CLIENT_KEY, net, cid,
                    create_keystore, keystorepath) != WBCGI_FTW_CBOK) {
                        goto cleanup;
                }

                /*
                 * Add the client certificate.
                 */
                if ((certstorepath = make_path(bootfs_dir,
                    NB_CLIENT_CERT)) == NULL ||
                    netboot_ftw(NB_CLIENT_CERT, net, cid,
                    copy_certstore, certstorepath) != WBCGI_FTW_CBOK) {
                        goto cleanup;
                }
        }

        if (authenticate_client || authenticate_server) {
                /*
                 * Add the trustfile; at least one truststore must exist.
                 */
                if ((truststorepath = make_path(bootfs_dir,
                    NB_CA_CERT)) == NULL) {
                        goto cleanup;
                }
                if (netboot_ftw(NB_CA_CERT, net, cid,
                    noact_cb, NULL) != WBCGI_FTW_CBOK) {
                        print_status(500, "(truststore not found)");
                }
                if (netboot_ftw(NB_CA_CERT, net, cid,
                    build_trustfile, truststorepath) == WBCGI_FTW_CBERR) {
                        goto cleanup;
                }

                /*
                 * Create the /dev/urandom file.
                 */
                if ((urandompath = make_path(bootfs_dev_dir,
                    "urandom")) == NULL ||
                    !create_urandom(urandompath)) {
                        goto cleanup;
                }
        }

        /*
         * Add the wanboot.conf(4) file.
         */
        if ((bootconfpath = make_path(bootfs_dir, NB_WANBOOT_CONF)) == NULL ||
            !copy_file(bootconf, bootconfpath)) {
                goto cleanup;
        }

        /*
         * Add the system_conf file if present.
         */
        if ((scf = bootconf_get(&bc_handle, BC_SYSTEM_CONF)) != NULL) {
                if (netboot_ftw(scf, net, cid,
                    set_pathname, &systemconf) != WBCGI_FTW_CBOK) {
                        print_status(500, "(system_conf file not found)");
                        goto cleanup;
                }
                if ((systemconfpath = make_path(bootfs_dir,
                    NB_SYSTEM_CONF)) == NULL ||
                    !copy_file(systemconf, systemconfpath)) {
                        goto cleanup;
                }
        }

        /*
         * Create the /nonce file.
         */
        if ((noncepath = make_path(bootfs_dir, "nonce")) == NULL ||
            !create_nonce(noncepath, nonce)) {
                goto cleanup;
        }

        /*
         * Create an /etc/inet/hosts file by extracting hostnames from CN,
         * URLs in bootconf and resolve-hosts in bootconf.
         */
        if ((hostspath = make_path(bootfs_etc_inet_dir, "hosts")) == NULL ||
            !create_hostsfile(hostspath, net, cid)) {
                goto cleanup;
        }

        /*
         * We would like to create a symbolic link etc/hosts -> etc/inet/hosts,
         * but unfortunately the HSFS support in the standalone doesn't handle
         * symlinks.
         */
        if ((etc_hostspath = make_path(bootfs_etc_dir, "hosts")) == NULL ||
            !copy_file(hostspath, etc_hostspath)) {
                goto cleanup;
        }

        /*
         * Create the /timestamp file.
         */
        if ((timestamppath = make_path(bootfs_dir, "timestamp")) == NULL ||
            !create_timestamp(timestamppath, "timestamp")) {
                goto cleanup;
        }

        /*
         * Create an HSFS file system for the directory.
         */
        if ((*wanbootfs_imagep = gen_tmppath("wanbootfs", net, cid)) == NULL ||
            !mkisofs(bootfs_dir, *wanbootfs_imagep)) {
                goto cleanup;
        }

        ret = B_TRUE;
cleanup:
        /*
         * Clean up temporary files and directories.
         */
        if (keystorepath != NULL &&
            WBCGI_FILE_EXISTS(keystorepath, sbuf)) {
                (void) unlink(keystorepath);
        }
        if (certstorepath != NULL &&
            WBCGI_FILE_EXISTS(certstorepath, sbuf)) {
                (void) unlink(certstorepath);
        }
        if (truststorepath != NULL &&
            WBCGI_FILE_EXISTS(truststorepath, sbuf)) {
                (void) unlink(truststorepath);
        }
        if (bootconfpath != NULL &&
            WBCGI_FILE_EXISTS(bootconfpath, sbuf)) {
                (void) unlink(bootconfpath);
        }
        if (systemconfpath != NULL &&
            WBCGI_FILE_EXISTS(systemconfpath, sbuf)) {
                (void) unlink(systemconfpath);
        }
        if (urandompath != NULL &&
            WBCGI_FILE_EXISTS(urandompath, sbuf)) {
                (void) unlink(urandompath);
        }
        if (noncepath != NULL &&
            WBCGI_FILE_EXISTS(noncepath, sbuf)) {
                (void) unlink(noncepath);
        }
        if (hostspath != NULL &&
            WBCGI_FILE_EXISTS(hostspath, sbuf)) {
                (void) unlink(hostspath);
        }
        if (etc_hostspath != NULL &&
            WBCGI_FILE_EXISTS(etc_hostspath, sbuf)) {
                (void) unlink(etc_hostspath);
        }
        if (timestamppath != NULL &&
            WBCGI_FILE_EXISTS(timestamppath, sbuf)) {
                (void) unlink(timestamppath);
        }

        if (bootfs_etc_inet_dir != NULL &&
            WBCGI_DIR_EXISTS(bootfs_etc_inet_dir, sbuf)) {
                (void) rmdir(bootfs_etc_inet_dir);
        }
        if (bootfs_etc_dir != NULL &&
            WBCGI_DIR_EXISTS(bootfs_etc_dir, sbuf)) {
                (void) rmdir(bootfs_etc_dir);
        }
        if (bootfs_dev_dir != NULL &&
            WBCGI_DIR_EXISTS(bootfs_dev_dir, sbuf)) {
                (void) rmdir(bootfs_dev_dir);
        }
        if (bootfs_dir != NULL &&
            WBCGI_DIR_EXISTS(bootfs_dir, sbuf)) {
                (void) rmdir(bootfs_dir);
        }

        /*
         * Free allocated memory.
         */
        free_path(&bootfs_dir);
        free_path(&bootfs_etc_dir);
        free_path(&bootfs_etc_inet_dir);
        free_path(&bootfs_dev_dir);

        free_path(&systemconf);
        free_path(&keystorepath);
        free_path(&certstorepath);
        free_path(&truststorepath);
        free_path(&bootconfpath);
        free_path(&systemconfpath);
        free_path(&urandompath);
        free_path(&noncepath);
        free_path(&hostspath);
        free_path(&etc_hostspath);
        free_path(&timestamppath);

        return (ret);
}

static boolean_t
miniroot_payload(const char *net, const char *cid, const char *docroot,
    char **rootpathp, char **rootinfop, boolean_t *https_rootserverp)
{
        boolean_t       ret = B_FALSE;
        char            *root_server;
        char            *root_file;
        url_t           url;
        struct stat     sbuf;
        char            sizebuf[WBCGI_MAXBUF];
        int             chars;
        int             fd = -1;

        if ((root_server = bootconf_get(&bc_handle, BC_ROOT_SERVER)) == NULL) {
                print_status(500, "(root_server must be specified)");
                goto cleanup;
        }
        if (url_parse(root_server, &url) != URL_PARSE_SUCCESS) {
                print_status(500, "(root_server URL is invalid)");
        }
        *https_rootserverp = url.https;

        if ((root_file = bootconf_get(&bc_handle, BC_ROOT_FILE)) == NULL) {
                print_status(500, "(rootfile must be specified)");
                goto cleanup;
        }
        if ((*rootpathp = make_path(docroot, root_file)) == NULL) {
                goto cleanup;
        }
        if (!WBCGI_FILE_EXISTS(*rootpathp, sbuf)) {
                print_status(500, "(root filesystem image missing)");
                goto cleanup;
        }

        if ((*rootinfop = gen_tmppath("mrinfo", net, cid)) == NULL) {
                goto cleanup;
        }
        if ((chars = snprintf(sizebuf, sizeof (sizebuf), "%ld",
            sbuf.st_size)) < 0 || chars > sizeof (sizebuf) ||
            (fd = open(*rootinfop,
            O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR)) == -1 ||
            !write_buffer(fd, sizebuf, strlen(sizebuf))) {
                print_status(500, "(error creating miniroot info file)");
                goto cleanup;
        }

        ret = B_TRUE;
cleanup:
        if (fd != -1) {
                (void) close(fd);
        }

        return (ret);
}

static boolean_t
deliver_payload(const char *payload, const char *payload_hash)
{
        int             fd = fileno(stdout);
        struct stat     payload_buf, hash_buf;
        int             chars;
        char            main_header[WBCGI_MAXBUF];
        char            multi_header[WBCGI_MAXBUF];
        char            multi_header1[WBCGI_MAXBUF];
        char            multi_header2[WBCGI_MAXBUF];
        char            multi_end[WBCGI_MAXBUF];
        size_t          msglen;

        if (!WBCGI_FILE_EXISTS(payload, payload_buf) ||
            !WBCGI_FILE_EXISTS(payload_hash, hash_buf)) {
                print_status(500, "(payload/hash file(s) missing)");
                return (B_FALSE);
        }

        /*
         * Multi-part header.
         */
        if ((chars = snprintf(multi_header, sizeof (multi_header),
            "%s--%s%s%sapplication/octet-stream%s%s", WBCGI_CRNL,
            WBCGI_WANBOOT_BNDTXT, WBCGI_CRNL, WBCGI_CONTENT_TYPE, WBCGI_CRNL,
            WBCGI_CONTENT_LENGTH)) < 0 || chars > sizeof (multi_header)) {
                print_status(500, "(error creating multi_header)");
                return (B_FALSE);
        }

        /*
         * Multi-part header for part one.
         */
        if ((chars = snprintf(multi_header1, sizeof (multi_header1),
            "%s%ld%s%s", multi_header, payload_buf.st_size, WBCGI_CRNL,
            WBCGI_CRNL)) < 0 || chars > sizeof (multi_header1)) {
                print_status(500, "(error creating multi_header1)");
                return (B_FALSE);
        }

        /*
         * Multi-part header for part two.
         */
        if ((chars = snprintf(multi_header2, sizeof (multi_header2),
            "%s%ld%s%s", multi_header, hash_buf.st_size, WBCGI_CRNL,
            WBCGI_CRNL)) < 0 || chars > sizeof (multi_header2)) {
                print_status(500, "(error creating multi_header2)");
                return (B_FALSE);
        }

        /*
         * End-of-parts Trailer.
         */
        if ((chars = snprintf(multi_end, sizeof (multi_end),
            "%s--%s--%s", WBCGI_CRNL, WBCGI_WANBOOT_BNDTXT,
            WBCGI_CRNL)) < 0 || chars > sizeof (multi_end)) {
                print_status(500, "(error creating multi_end)");
                return (B_FALSE);
        }

        /*
         * Message header.
         */
        msglen = payload_buf.st_size +  hash_buf.st_size +
            strlen(multi_header1) + strlen(multi_header2) + strlen(multi_end);

        if ((chars = snprintf(main_header, sizeof (main_header),
            "%s%u%s%smultipart/mixed; boundary=%s%s%s", WBCGI_CONTENT_LENGTH,
            msglen, WBCGI_CRNL, WBCGI_CONTENT_TYPE, WBCGI_WANBOOT_BNDTXT,
            WBCGI_CRNL, WBCGI_CRNL)) < 0 || chars > sizeof (main_header)) {
                print_status(500, "(error creating main_header)");
                return (B_FALSE);
        }

        /*
         * Write the message out.  If things fall apart during this then
         * there's no way to report the error back to the client.
         */
        if (!write_buffer(fd, main_header, strlen(main_header)) ||
            !write_buffer(fd, multi_header1, strlen(multi_header1)) ||
            !write_file(fd, payload, payload_buf.st_size) ||
            !write_buffer(fd, multi_header2, strlen(multi_header2)) ||
            !write_file(fd, payload_hash, hash_buf.st_size) ||
            !write_buffer(fileno(stdout), multi_end, strlen(multi_end))) {
                return (B_FALSE);
        }

        return (B_TRUE);
}


/*ARGSUSED*/
int
main(int argc, char **argv)
{
        int             ret = WBCGI_STATUS_ERR;
        struct stat     sbuf;
        int             content;
        char            *net;
        char            *cid;
        char            *nonce;
        char            *docroot;
        char            *payload;
        char            *signature_type;
        char            *encryption_type;
        char            *bootconf = NULL;
        char            *keyfile = NULL;
        char            *bootpath = NULL;
        char            *wanbootfs_image = NULL;
        char            *rootpath = NULL;
        char            *miniroot_info = NULL;
        char            *encr_payload = NULL;
        char            *payload_hash = NULL;
        boolean_t       https_rootserver;

        /*
         * Process the query string.
         */
        if (!get_request_info(&content, &net, &cid, &nonce, &docroot)) {
                goto cleanup;
        }

        /*
         * Sanity check that the netboot directory exists.
         */
        if (!WBCGI_DIR_EXISTS(NB_NETBOOT_ROOT, sbuf)) {
                print_status(500, "(" NB_NETBOOT_ROOT " does not exist)");
                goto cleanup;
        }

        /*
         * Get absolute bootconf pathname.
         */
        if (netboot_ftw(NB_WANBOOT_CONF, net, cid,
            set_pathname, &bootconf) != WBCGI_FTW_CBOK) {
                print_status(500, "(wanboot.conf not found)");
                goto cleanup;
        }

        /*
         * Initialize bc_handle from the given wanboot.conf file.
         */
        if (bootconf_init(&bc_handle, bootconf) != BC_SUCCESS) {
                char    message[WBCGI_MAXBUF];
                int     chars;

                chars = snprintf(message, sizeof (message),
                    "(wanboot.conf error: %s)", bootconf_errmsg(&bc_handle));
                if (chars > 0 && chars < sizeof (message))
                        print_status(500, message);
                else
                        print_status(500, "(wanboot.conf error)");
                goto cleanup;
        }

        /*
         * Get and check signature and encryption types,
         * presence of helper utilities, keystore, etc.
         */
        if ((signature_type = bootconf_get(&bc_handle,
            BC_SIGNATURE_TYPE)) != NULL) {
                if (!WBCGI_FILE_EXISTS(WBCGI_HMAC_PATH, sbuf)) {
                        print_status(500, "(hmac utility not found)");
                        goto cleanup;
                }
                if (keyfile == NULL && netboot_ftw(NB_CLIENT_KEY, net, cid,
                    set_pathname, &keyfile) != WBCGI_FTW_CBOK) {
                        print_status(500, "(keystore not found)");
                        goto cleanup;
                }
                if (!check_key_type(keyfile, signature_type, WBKU_HASH_KEY)) {
                        print_status(500, "(hash key not found)");
                        goto cleanup;
                }
        }
        if ((encryption_type = bootconf_get(&bc_handle,
            BC_ENCRYPTION_TYPE)) != NULL) {
                if (signature_type == NULL) {
                        print_status(500, "(encrypted but not signed)");
                        goto cleanup;
                }
                if (!WBCGI_FILE_EXISTS(WBCGI_ENCR_PATH, sbuf)) {
                        print_status(500, "(encr utility not found)");
                        goto cleanup;
                }
                if (keyfile == NULL && netboot_ftw(NB_CLIENT_KEY, net, cid,
                    set_pathname, &keyfile) != WBCGI_FTW_CBOK) {
                        print_status(500, "(keystore not found)");
                        goto cleanup;
                }
                if (!check_key_type(keyfile, encryption_type, WBKU_ENCR_KEY)) {
                        print_status(500, "(encr key not found)");
                        goto cleanup;
                }
        }

        /*
         * Determine/create our payload.
         */
        switch (content) {
        case WBCGI_CONTENT_BOOTFILE:
                if (!bootfile_payload(docroot, &bootpath)) {
                        goto cleanup;
                }
                payload = bootpath;

                break;

        case WBCGI_CONTENT_BOOTFS:
                if (!wanbootfs_payload(net, cid, nonce,
                    bootconf, &wanbootfs_image)) {
                        goto cleanup;
                }
                payload = wanbootfs_image;

                break;

        case WBCGI_CONTENT_ROOTFS:
                if (!miniroot_payload(net, cid, docroot,
                    &rootpath, &miniroot_info, &https_rootserver)) {
                        goto cleanup;
                }
                payload = rootpath;

                break;
        }

        /*
         * Encrypt the payload if necessary.
         */
        if (content != WBCGI_CONTENT_BOOTFILE &&
            content != WBCGI_CONTENT_ROOTFS &&
            encryption_type != NULL) {
                if ((encr_payload = gen_tmppath("encr", net, cid)) == NULL) {
                        goto cleanup;
                }

                if (!encrypt_payload(payload, encr_payload, keyfile,
                    encryption_type)) {
                        goto cleanup;
                }

                payload = encr_payload;
        }

        /*
         * Compute the hash (actual or null).
         */
        if ((payload_hash = gen_tmppath("hash", net, cid)) == NULL) {
                goto cleanup;
        }

        if (signature_type != NULL &&
            (content != WBCGI_CONTENT_ROOTFS || !https_rootserver)) {
                if (!hash_payload(payload, payload_hash, keyfile)) {
                        goto cleanup;
                }
        } else {
                if (!create_null_hash(payload_hash)) {
                        goto cleanup;
                }
        }

        /*
         * For the rootfs the actual payload transmitted is the file
         * containing the size of the rootfs (as a string of ascii digits);
         * point payload at this instead.
         */
        if (content == WBCGI_CONTENT_ROOTFS) {
                payload = miniroot_info;
        }

        /*
         * Finally, deliver the payload and hash as a multipart message.
         */
        if (!deliver_payload(payload, payload_hash)) {
                goto cleanup;
        }

        ret = WBCGI_STATUS_OK;
cleanup:
        /*
         * Clean up temporary files.
         */
        if (wanbootfs_image != NULL &&
            WBCGI_FILE_EXISTS(wanbootfs_image, sbuf)) {
                (void) unlink(wanbootfs_image);
        }
        if (miniroot_info != NULL &&
            WBCGI_FILE_EXISTS(miniroot_info, sbuf)) {
                (void) unlink(miniroot_info);
        }
        if (encr_payload != NULL &&
            WBCGI_FILE_EXISTS(encr_payload, sbuf)) {
                (void) unlink(encr_payload);
        }
        if (payload_hash != NULL &&
            WBCGI_FILE_EXISTS(payload_hash, sbuf)) {
                (void) unlink(payload_hash);
        }

        /*
         * Free up any allocated strings.
         */
        free_path(&bootconf);
        free_path(&keyfile);
        free_path(&bootpath);
        free_path(&wanbootfs_image);
        free_path(&rootpath);
        free_path(&miniroot_info);
        free_path(&encr_payload);
        free_path(&payload_hash);

        bootconf_end(&bc_handle);

        return (ret);
}