libkmf/common/client.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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * File: CLIENT.C
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <fcntl.h>
#include <poll.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
#include <libgen.h>
#include <kmfapi.h>
#include <kmfapiP.h>
#include <libxml2/libxml/uri.h>

extern int errno;

#define OCSP_BUFSIZE 1024

typedef enum {
    KMF_RESPONSE_OCSP = 1,
    KMF_RESPONSE_FILE = 2
} KMF_RESPONSE_TYPE;

#define TEMP_TEMPLATE   "temp.XXXXXX"

/*
 * This function will establish a socket to the host on the specified port.
 * If succeed, it return a socket descriptor; otherwise, return -1.
 */
static int init_socket(char *host, short port)
{
    struct sockaddr_in sin;
    struct hostent *hp, hrec;
    int sockfd, opt, herrno;
    char hostbuf[BUFSIZ];

    sin.sin_family = PF_INET;
    sin.sin_port = htons(port);
    if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
        if ((hp = gethostbyname_r(host, &hrec, hostbuf,
            sizeof (hostbuf), &herrno)) == NULL) {
            return (-1);
        }
        (void) memcpy((char *)&sin.sin_addr, hp->h_addr,
            hp->h_length);
    }

    if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
        return (-1);
    }

    opt = 1;
    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char *)&opt,
        sizeof (opt)) < 0) {
        (void) close(sockfd);
        return (-1);
    }

    if (connect(sockfd, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
        (void) close(sockfd);
        return (-1);
    }

    return (sockfd);
}

/*
 * This function will connect to host on the port.
 * If succeed, return a socket descriptor; otherwise, return 0.
 */
static int
connect_to_server(char *host, short port)
{
    int retry = 1;
    int sd = 0;

    while (retry) {
        if ((sd = init_socket(host, port)) == -1) {
            if (errno == ECONNREFUSED) {
                retry = 1;
                (void) sleep(1);
            } else {
                retry = 0;
            }
        } else  {
            retry = 0;
        }
    }
    return (sd);
}

static KMF_RETURN
send_ocsp_request(int sock, char *reqfile, char *hostname)
{
    KMF_RETURN ret = KMF_OK;
    int filefd, bytes, n, total = 0;
    char buf[OCSP_BUFSIZE];
    struct stat s;
    char req_header[256];
    static char req_format[] =
"POST %s HTTP/1.0\r\n\
Content-Type: application/ocsp-request\r\n\
Content-Length: %d\r\n\r\n";

    if ((filefd = open(reqfile, O_RDONLY)) == -1) {
        ret = KMF_ERR_OPEN_FILE;
        return (ret);
    }

    /* open the request file */
    if (fstat(filefd, &s) < 0) {
        ret = KMF_ERR_OPEN_FILE;
        return (ret);
    }


    /* Send http header */
    if (hostname != NULL) {
        (void) snprintf(req_header, 256, req_format, hostname,
            s.st_size);
    } else {
        (void) snprintf(req_header, 256, req_format, "/", s.st_size);
    }
    bytes = strlen(req_header);

    if ((n = write(sock, req_header, bytes)) < 0) {
        ret = KMF_ERR_SEND_REQUEST;
        goto exit;
    }

    /* Send the request content */
    while ((bytes = read(filefd, buf, OCSP_BUFSIZE)) > 0) {
        if ((n = write(sock, buf, bytes)) < 0) {
            ret = KMF_ERR_SEND_REQUEST;
            goto exit;
        }
        total += n;
        (void) memset(buf, 0, sizeof (buf));
    }

exit:
    (void) close(filefd);
    return (ret);
}


/*
 * Perform a write that can handle EINTR.
 */
static int
looping_write(int fd, void *buf, int len)
{
    char *p = buf;
    int cc, len2 = 0;

    if (len == 0)
        return (0);
    do {
        cc = write(fd, p, len);
        if (cc < 0) {
            if (errno == EINTR)
                continue;
            return (cc);
        } else if (cc == 0) {
            return (len2);
        } else {
            p += cc;
            len2 += cc;
            len -= cc;
        }
    } while (len > 0);

    return (len2);
}

/*
 * This function will get the response from the server, check the http status
 * line, and write the response content to a file.  If this is a OCSP response,
 * it will check the content type also.
 */
static KMF_RETURN
get_encoded_response(int sock, KMF_RESPONSE_TYPE resptype, int filefd,
    unsigned int maxsecs)
{
    int ret = KMF_OK;
    char *buf = NULL;
    int buflen = 0;
    int offset = 0;
    int search_offset;
    const int buf_incre = OCSP_BUFSIZE; /* 1 KB at a time */
    const int maxBufSize = 8 * buf_incre; /* 8 KB max */
    const char *CRLF = "\r\n";
    const char *headerEndMark = "\r\n\r\n";
    const char *httpprotocol = "HTTP/";
    const int CRLFlen = strlen(CRLF);
    const int marklen = strlen(headerEndMark);
    const int httplen = strlen(httpprotocol);
    char *headerEnd = NULL;
    boolean_t EOS = B_FALSE;
    const char *httpcode = NULL;
    const char *contenttype = NULL;
    int contentlength = 0;
    int bytes = 0;
    char *statusLineEnd = NULL;
    char *space = NULL;
    char *nextHeader = NULL;
    struct pollfd pfd;
    int sock_flag;
    int poll_ret;
    boolean_t timeout = B_FALSE;

    /* set O_NONBLOCK flag on socket */
    if ((sock_flag = fcntl(sock, F_GETFL, 0)) == -1) {
        return (KMF_ERR_RECV_RESPONSE);
    }
    sock_flag |= O_NONBLOCK;
    if (fcntl(sock, F_SETFL, sock_flag) == -1) {
        return (KMF_ERR_RECV_RESPONSE);
    }

    /* set up poll */
    pfd.fd = sock;
    pfd.events = POLLIN;

    /*
     * First read HTTP status line and headers.  We will read up to at
     * least the end of the HTTP headers
     */
    do {
        if ((buflen - offset) < buf_incre) {
            buflen += buf_incre;
            buf = realloc(buf, buflen + 1);
            if (buf == NULL) {
                ret = KMF_ERR_MEMORY;
                goto out;
            }
        }

        pfd.revents = 0;
        poll_ret = poll(&pfd, 1, maxsecs * MILLISEC);
        if (poll_ret == 0) {
            timeout = B_TRUE;
            break;
        } else if (poll_ret < 0) {
            ret = KMF_ERR_RECV_RESPONSE;
            goto out;
        } else {
            if (pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
                ret = KMF_ERR_RECV_RESPONSE;
                goto out;
            }
        }

        bytes = read(sock, buf + offset,  buf_incre);
        if (bytes < 0) {
            if (errno == EWOULDBLOCK) { /* no data this time */
                continue;
            } else {
                ret = KMF_ERR_RECV_RESPONSE;
                goto out;
            }
        } else if (bytes == 0) { /* no more data */
            EOS = B_TRUE;
        } else { /* bytes > 0 */
            search_offset = (offset - marklen) > 0 ?
                offset - marklen : 0;
            offset += bytes;
            *(buf + offset) = '\0'; /* NULL termination */

            headerEnd = strstr((const char *)buf + search_offset,
                headerEndMark);
        }

    } while ((!headerEnd) && (EOS == B_FALSE) && (buflen < maxBufSize));

    if (timeout == B_TRUE) {
        ret = KMF_ERR_RECV_TIMEOUT;
        goto out;
    } else if (headerEnd == NULL) {
        /* could not find the end of headers */
        ret = KMF_ERR_BAD_HTTP_RESPONSE;
        goto out;
    }

    /*
     * Parse the HTTP status line, which will look like this:
     * "HTTP/1.1 200 OK".
     */
    statusLineEnd = strstr((const char *)buf, CRLF);
    if (statusLineEnd == NULL) {
        ret = KMF_ERR_BAD_HTTP_RESPONSE;
        goto out;
    }
    *statusLineEnd = '\0';

    space = strchr((const char *)buf, ' ');
    if (space == NULL ||
        (strncasecmp((const char *)buf, httpprotocol, httplen) != 0)) {
        ret = KMF_ERR_BAD_HTTP_RESPONSE;
        goto out;
    }

    /*
     * Check the HTTP status code. If it is not 200, the HTTP response
     * is not good.
     */
    httpcode = space + 1;
    space = strchr(httpcode, ' ');
    if (space == NULL) {
        ret = KMF_ERR_BAD_HTTP_RESPONSE;
        goto out;
    }

    *space = 0;
    if (strcmp(httpcode, "200") != 0) {
        ret = KMF_ERR_BAD_HTTP_RESPONSE;
        goto out;
    }

    /*
     * Parse the HTTP headers in the buffer.  Save content-type and
     * content-length only.
     */
    nextHeader = statusLineEnd + CRLFlen;
    *headerEnd = '\0'; /* terminate */
    do {
        char *thisHeaderEnd = NULL;
        char *value = NULL;
        char *colon = strchr(nextHeader, ':');

        if (colon == NULL) {
            ret = KMF_ERR_BAD_HTTP_RESPONSE;
            goto out;
        }
        *colon = '\0';

        value = colon + 1;
        if (*value != ' ') {
            ret = KMF_ERR_BAD_HTTP_RESPONSE;
            goto out;
        }
        value++;

        thisHeaderEnd  = strstr(value, CRLF);
        if (thisHeaderEnd != NULL)
            *thisHeaderEnd  = '\0';

        if (strcasecmp(nextHeader, "content-type") == 0) {
            contenttype = value;
        } else if (strcasecmp(nextHeader, "content-length") == 0) {
            contentlength = atoi(value);
        }

        if (thisHeaderEnd != NULL) {
            nextHeader = thisHeaderEnd + CRLFlen;
        } else {
            nextHeader = NULL;
        }

    } while (nextHeader && (nextHeader < (headerEnd + CRLFlen)));

    /* Check the contenttype if this is an OCSP response */
    if (resptype == KMF_RESPONSE_OCSP) {
        if (contenttype == NULL) {
            ret = KMF_ERR_BAD_HTTP_RESPONSE;
            goto out;
        } else if (strcasecmp(contenttype,
            "application/ocsp-response") != 0) {
            ret = KMF_ERR_BAD_HTTP_RESPONSE;
            goto out;
        }
    }

    /* Now we are ready to read the body of the response */
    offset = offset - (int)(headerEnd - (const char *)buf) - marklen;
    if (offset) {
        /* move all data to the beginning of the buffer */
        (void) memmove(buf, headerEnd + marklen, offset);
    }

    /* resize buffer to only what's needed to hold the current response */
    buflen = (1 + (offset-1) / buf_incre) * buf_incre;

    while ((EOS == B_FALSE) &&
        ((contentlength == 0) || (offset < contentlength)) &&
        (buflen < maxBufSize)) {
        /* we still need to receive more content data */
        if ((buflen - offset) < buf_incre) {
            buflen += buf_incre;
            buf = realloc(buf, buflen + 1);
            if (buf == NULL) {
                ret = KMF_ERR_MEMORY;
                goto out;
            }
        }

        pfd.revents = 0;
        poll_ret = poll(&pfd, 1, maxsecs * MILLISEC);
        if (poll_ret == 0) {
            timeout = B_TRUE;
            break;
        } else if (poll_ret < 0) {
            ret = KMF_ERR_RECV_RESPONSE;
            goto out;
        } else {
            if (pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
                ret = KMF_ERR_RECV_RESPONSE;
                goto out;
            }
        }

        bytes = read(sock, buf + offset,  buf_incre);
        if (bytes < 0) {
            if (errno == EWOULDBLOCK) {
                continue;
            } else {
                ret = KMF_ERR_RECV_RESPONSE;
                goto out;
            }
        } else if (bytes == 0) { /* no more data */
            EOS = B_TRUE;
        } else {
            offset += bytes;
        }
    }

    if (timeout == B_TRUE) {
        ret = KMF_ERR_RECV_TIMEOUT;
        goto out;
    } else if (((contentlength != 0) && (offset < contentlength)) ||
        offset == 0) {
        ret = KMF_ERR_BAD_HTTP_RESPONSE;
        goto out;
    }

    /* write to the file */
    if (looping_write(filefd, buf, offset) != offset) {
        ret = KMF_ERR_WRITE_FILE;
    }

out:
    free(buf);
    return (ret);
}

KMF_RETURN
kmf_get_encoded_ocsp_response(KMF_HANDLE_T handle,
    char *reqfile, char *hostname,
    int port, char *proxy, int proxy_port, char *respfile,
    unsigned int maxsecs)
{
    KMF_RETURN ret = KMF_OK;
    int sock, respfd;
    char http_hostname[256];
    int final_proxy_port, final_port;

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    if (hostname == NULL || reqfile == NULL || respfile == NULL) {
        return (KMF_ERR_BAD_PARAMETER);
    }

    final_proxy_port = (proxy_port == 0 || proxy_port == -1) ?
        80 : proxy_port;
    final_port = (port == 0 || port == -1) ? 80 : port;

    /* Connect to server */
    if (proxy != NULL) {
        sock = connect_to_server(proxy, final_proxy_port);
    } else {
        sock = connect_to_server(hostname, final_port);
    }

    if (sock == -1) {
        return (KMF_ERR_CONNECT_SERVER);
    }

    /* Send the OCSP request */
    if (proxy != NULL) {
        (void) snprintf(http_hostname, sizeof (http_hostname),
            "http://%s:%d", hostname, final_port);
        ret = send_ocsp_request(sock, reqfile, http_hostname);
    } else {
        ret = send_ocsp_request(sock, reqfile, NULL);
    }

    if (ret != KMF_OK) {
        goto out;
    }

    /* Retrieve the OCSP response */
    if (maxsecs == 0) {
        maxsecs = 30; /* default poll time limit is 30 seconds */
    }

    if ((respfd = open(respfile, O_CREAT |O_RDWR | O_EXCL, 0600)) == -1) {
        ret = KMF_ERR_OPEN_FILE;
    } else {
        ret = get_encoded_response(sock, KMF_RESPONSE_OCSP,
            respfd, maxsecs);
        (void) close(respfd);
    }

out:
    (void) close(sock);
    return (ret);
}

static KMF_RETURN
send_download_request(int sock, char *hostname, int port, boolean_t is_proxy,
    char *loc)
{
    KMF_RETURN ret = KMF_OK;
    char url[256];
    char req_header[1024];
    static char req_format[] =
"GET %s HTTP/1.0\r\n\
Host: %s:%d\r\n\
Accept: */*\r\n\r\n";

    if (is_proxy) {
        (void) snprintf(url, sizeof (url), "http://%s:%d/%s",
            hostname, port, loc);
    } else {
        (void) snprintf(url, sizeof (url), "/%s", loc);
    }

    (void) snprintf(req_header, sizeof (req_header), req_format, url,
        hostname, port);

    if (write(sock, req_header, strlen(req_header)) < 0) {
        ret = KMF_ERR_SEND_REQUEST;
    }

    return (ret);
}

static KMF_RETURN
download_file(char *uri, char *proxy, int proxy_port,
    unsigned int maxsecs, int filefd)
{
    KMF_RETURN ret = KMF_OK;
    xmlURIPtr   uriptr;
    int sock;
    boolean_t is_proxy;
    int final_proxy_port;
    char *hostname = NULL;
    char *path = NULL;
    int port;

    if (uri == NULL || filefd == -1)
        return (KMF_ERR_BAD_PARAMETER);

    /* Parse URI */
    uriptr = xmlParseURI(uri);
    if (uriptr == NULL) {
        ret = KMF_ERR_BAD_URI;
        goto out;
    }

    if (uriptr->scheme == NULL ||
        strncasecmp(uriptr->scheme, "http", 4) != 0) {
        ret = KMF_ERR_BAD_URI;  /* we support http only */
        goto out;
    }

    /* get the host name */
    hostname = uriptr->server;
    if (hostname == NULL) {
        ret = KMF_ERR_BAD_URI;
        goto out;
    }

    /* get the port number */
    port = uriptr->port;
    if (port == 0) {
        port = 80;
    }

    /* Get the path */
    path = uriptr->path;
    if (path == NULL) {
        ret = KMF_ERR_BAD_URI;
        goto out;
    }

    /* Connect to server */
    if (proxy != NULL) {
        final_proxy_port = (proxy_port == 0 || proxy_port == -1) ?
            80 : proxy_port;
        is_proxy = B_TRUE;
        sock = connect_to_server(proxy, final_proxy_port);
    } else {
        is_proxy = B_FALSE;
        sock = connect_to_server(hostname, port);
    }
    if (sock == -1) {
        ret = KMF_ERR_CONNECT_SERVER;
        goto out;
    }

    /* Send the request */
    ret = send_download_request(sock, hostname, port, is_proxy, path);
    if (ret != KMF_OK) {
        goto out;
    }

    /* Retrieve the response */
    ret = get_encoded_response(sock, KMF_RESPONSE_FILE, filefd,
        maxsecs == 0 ? 30 : maxsecs);
    if (ret != KMF_OK) {
        goto out;
    }

out:
    if (uriptr != NULL)
        xmlFreeURI(uriptr);

    if (sock != -1)
        (void) close(sock);

    return (ret);
}


KMF_RETURN
kmf_download_crl(KMF_HANDLE_T handle, char *uri, char *proxy, int proxy_port,
    unsigned int maxsecs, char *crlfile, KMF_ENCODE_FORMAT *pformat)
{
    KMF_RETURN ret = KMF_OK;
    char *filename = NULL;
    char tempfn[MAXPATHLEN];
    boolean_t temp_created = B_FALSE;
    mode_t old_mode;
    int fd = -1, tmpfd = -1;

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    if (uri == NULL || crlfile == NULL || pformat == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    if ((fd = open(crlfile, O_CREAT |O_RDWR | O_EXCL, 0644)) == -1)
        return (KMF_ERR_OPEN_FILE);

    /*
     * Download the file and save it to a temp file. To make rename()
     * happy, the temp file needs to be created in the same directory as
     * the target file.
     */
    if ((filename = strdup(crlfile)) == NULL) {
        ret = KMF_ERR_MEMORY;
        goto out;
    }
    (void) snprintf(tempfn, MAXPATHLEN, "%s/%s", dirname(filename),
        TEMP_TEMPLATE);
    old_mode = umask(077);
    tmpfd = mkstemp(tempfn);
    (void) umask(old_mode);
    if (tmpfd == -1) {
        ret = KMF_ERR_INTERNAL;
        goto out;
    } else {
        temp_created = B_TRUE;
    }

    ret = download_file(uri, proxy, proxy_port, maxsecs, tmpfd);
    (void) close(tmpfd);
    if (ret != KMF_OK) {
        goto out;
    }

    /* Check if it is a CRL file and get its format */
    if (kmf_is_crl_file(handle, tempfn, pformat) != KMF_OK) {
        ret = KMF_ERR_BAD_CRLFILE;
        goto out;
    }

    /* Finally, change the temp filename to the target crlfile */
    if (rename(tempfn, crlfile) == -1) {
        ret = KMF_ERR_WRITE_FILE;
        goto out;
    }

out:
    if (filename != NULL)
        free(filename);

    if (ret != KMF_OK && temp_created == B_TRUE)
        (void) unlink(tempfn);

    if (fd != -1)
        (void) close(fd);

    return (ret);
}


KMF_RETURN
kmf_download_cert(KMF_HANDLE_T handle, char *uri, char *proxy, int proxy_port,
    unsigned int maxsecs, char *certfile, KMF_ENCODE_FORMAT *pformat)
{
    KMF_RETURN ret = KMF_OK;
    char *filename = NULL;
    char tempfn[MAXPATHLEN];
    boolean_t temp_created = B_FALSE;
    mode_t old_mode;
    int fd = -1, tmpfd = -1;

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    if (uri == NULL || certfile == NULL || pformat == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    if ((fd = open(certfile, O_CREAT |O_RDWR | O_EXCL, 0644)) == -1)
        return (KMF_ERR_OPEN_FILE);

    /*
     * Download the file and save it to a temp file. To make rename()
     * happy, the temp file needs to be created in the same directory as
     * the target file.
     */
    if ((filename = strdup(certfile)) == NULL) {
        ret = KMF_ERR_MEMORY;
        goto out;
    }
    (void) snprintf(tempfn, MAXPATHLEN, "%s/%s", dirname(filename),
        TEMP_TEMPLATE);

    old_mode = umask(077);
    tmpfd = mkstemp(tempfn);
    (void) umask(old_mode);
    if (tmpfd == -1) {
        ret = KMF_ERR_INTERNAL;
        goto out;
    } else {
        temp_created = B_TRUE;
    }

    ret = download_file(uri, proxy, proxy_port, maxsecs, tmpfd);
    (void) close(tmpfd);
    if (ret != KMF_OK) {
        goto out;
    }

    /* Check if it is a Cert file and get its format */
    if (kmf_is_cert_file(handle, tempfn, pformat) != KMF_OK) {
        ret = KMF_ERR_BAD_CERTFILE;
        goto out;
    }

    /* Finally, change the temp filename to the target filename */
    if (rename(tempfn, certfile) == -1) {
        ret = KMF_ERR_WRITE_FILE;
        goto out;
    }

out:
    if (filename != NULL)
        free(filename);

    if (ret != KMF_OK && temp_created == B_TRUE)
        (void) unlink(tempfn);

    if (fd != -1)
        (void) close(fd);

    return (ret);
}

KMF_RETURN
kmf_get_ocsp_for_cert(KMF_HANDLE_T handle,
    KMF_DATA *user_cert,
    KMF_DATA *ta_cert,
    KMF_DATA *response)
{
    KMF_POLICY_RECORD *policy;
    KMF_RETURN ret = KMF_OK;
    char *hostname = NULL, *host_uri = NULL, *proxyname = NULL;
    char *proxy_port_s = NULL;
    int host_port = 0, proxy_port = 0;
    char ocsp_reqname[MAXPATHLEN];
    char ocsp_respname[MAXPATHLEN];
    KMF_X509EXT_AUTHINFOACCESS aia;
    int i;
    boolean_t found = B_FALSE;
    KMF_X509EXT_ACCESSDESC *access_info;
    xmlURIPtr   uriptr = NULL;
    KMF_ATTRIBUTE attrlist[10];
    int numattr = 0;

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    if (user_cert == NULL || ta_cert == NULL || response == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    policy = handle->policy;

    /* Create an OCSP request  */
    kmf_set_attr_at_index(attrlist, numattr,
        KMF_ISSUER_CERT_DATA_ATTR, ta_cert,
        sizeof (KMF_DATA));
    numattr++;

    kmf_set_attr_at_index(attrlist, numattr,
        KMF_USER_CERT_DATA_ATTR, user_cert,
        sizeof (KMF_DATA));
    numattr++;

    /*
     * Create temporary files to hold the OCSP request & response data.
     */
    (void) strlcpy(ocsp_reqname, OCSPREQ_TEMPNAME,
        sizeof (ocsp_reqname));
    if (mkstemp(ocsp_reqname) == -1) {
        return (KMF_ERR_INTERNAL);
    }

    (void) strlcpy(ocsp_respname, OCSPRESP_TEMPNAME,
        sizeof (ocsp_respname));
    if (mkstemp(ocsp_respname) == -1) {
        return (KMF_ERR_INTERNAL);
    }

    kmf_set_attr_at_index(attrlist, numattr,
        KMF_OCSP_REQUEST_FILENAME_ATTR, ocsp_respname,
        strlen(ocsp_respname));
    numattr++;

    ret = kmf_create_ocsp_request(handle, numattr, attrlist);
    if (ret != KMF_OK) {
        goto out;
    }

    if (policy->VAL_OCSP_BASIC.uri_from_cert == 0) {
        if (policy->VAL_OCSP_BASIC.responderURI == NULL) {
            ret = KMF_ERR_OCSP_POLICY;
            goto out;
        }
        host_uri = policy->VAL_OCSP_BASIC.responderURI;

    } else {
        /*
         * Get the responder URI from certificate
         * Authority Information Access
         * thru OID_PKIX_AD_OCSP
         */
        ret = kmf_get_cert_auth_info_access(user_cert, &aia);
        if (ret != KMF_OK) {
            goto out;
        }

        for (i = 0; i < aia.numberOfAccessDescription; i++) {
            access_info = &aia.AccessDesc[i];
            if (IsEqualOid(&access_info->AccessMethod,
                (KMF_OID *)&KMFOID_PkixAdOcsp)) {
                host_uri =
                    (char *)access_info->AccessLocation.Data;
                found = B_TRUE;
                break;
            }
        }

        if (!found) {
            ret = KMF_ERR_OCSP_POLICY;
            goto out;
        }
    }

    /* Parse the URI string; get the hostname and port */
    uriptr = xmlParseURI(host_uri);
    if (uriptr == NULL) {
        ret = KMF_ERR_BAD_URI;
        goto out;
    }

    if (strncasecmp(uriptr->scheme, "http", 4) != 0) {
        ret = KMF_ERR_BAD_URI;  /* we support http only */
        goto out;
    }

    hostname = uriptr->server;
    if (hostname == NULL) {
        ret = KMF_ERR_BAD_URI;
        goto out;
    }

    host_port = uriptr->port;
    if (host_port == 0)
        host_port = 80;

    /* get the proxy info */
    if (policy->VAL_OCSP_BASIC.proxy != NULL) {
        char *last;
        proxyname =
            strtok_r(policy->VAL_OCSP_BASIC.proxy, ":", &last);
        proxy_port_s = strtok_r(NULL, "\0", &last);
        if (proxy_port_s != NULL) {
            proxy_port = strtol(proxy_port_s, NULL, 0);
        } else {
            proxy_port = 8080; /* default */
        }
    }

    /*
     * Send the request to an OCSP responder and receive an
     * OCSP response.
     */
    ret = kmf_get_encoded_ocsp_response(handle, ocsp_reqname,
        hostname, host_port,  proxyname, proxy_port,
        ocsp_respname, 30);
    if (ret != KMF_OK) {
        goto out;
    }

    ret = kmf_read_input_file(handle, ocsp_respname, response);

out:
    (void) unlink(ocsp_reqname);
    (void) unlink(ocsp_respname);

    if (uriptr != NULL)
        xmlFreeURI(uriptr);

    return (ret);
}