/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */

/* tests/gssapi/t_iov.c - Test program for IOV functions */

/*

 * Copyright (C) 2013 by the Massachusetts Institute of Technology.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * * Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 *

 * * Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in

 *   the documentation and/or other materials provided with the

 *   distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stddef.h>

#include "common.h"

/* Concatenate iov (except for sign-only buffers) into a contiguous token. */

static void

concat_iov(gss_iov_buffer_desc *iov, size_t iovlen, char **buf_out,

           size_t *len_out)

{

    size_t len, i;

    char *buf;

    /* Concatenate the result into a contiguous buffer. */

    len = 0;

    for (i = 0; i < iovlen; i++) {

        if (GSS_IOV_BUFFER_TYPE(iov[i].type) != GSS_IOV_BUFFER_TYPE_SIGN_ONLY)

            len += iov[i].buffer.length;

    }

    buf = malloc(len);

    if (buf == NULL)

        errout("malloc failed");

    len = 0;

    for (i = 0; i < iovlen; i++) {

        if (GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_SIGN_ONLY)

            continue;

        memcpy(buf + len, iov[i].buffer.value, iov[i].buffer.length);

        len += iov[i].buffer.length;

    }

    *buf_out = buf;

    *len_out = len;

}

static void

check_encrypted(const char *msg, int conf, const char *buf, const char *plain)

{

    int same = memcmp(buf, plain, strlen(plain)) == 0;

    if ((conf && same) || (!conf && !same))

        errout(msg);

}

/*

 * Wrap str in standard form (HEADER | DATA | PADDING | TRAILER) using the

 * caller-provided array iov, which must have space for four elements.  Library

 * allocation will be used for the header/padding/trailer buffers, so the

 * caller must check and free them.

 */

static void

wrap_std(gss_ctx_id_t ctx, char *str, gss_iov_buffer_desc *iov, int conf)

{

    OM_uint32 minor, major;

    int oconf;

    /* Lay out iov array. */

    iov[0].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;

    iov[1].type = GSS_IOV_BUFFER_TYPE_DATA;

    iov[1].buffer.value = str;

    iov[1].buffer.length = strlen(str);

    iov[2].type = GSS_IOV_BUFFER_TYPE_PADDING | GSS_IOV_BUFFER_FLAG_ALLOCATE;

    iov[3].type = GSS_IOV_BUFFER_TYPE_TRAILER | GSS_IOV_BUFFER_FLAG_ALLOCATE;

    /* Wrap.  This will allocate header/padding/trailer buffers as necessary

     * and encrypt str in place. */

    major = gss_wrap_iov(&minor, ctx, conf, GSS_C_QOP_DEFAULT, &oconf, iov, 4);

    check_gsserr("gss_wrap_iov(std)", major, minor);

    if (oconf != conf)

        errout("gss_wrap_iov(std) conf");

}

/* Create standard tokens using gss_wrap_iov and ctx1, and make sure we can

 * unwrap them using ctx2 in all of the supported ways. */

static void

test_standard_wrap(gss_ctx_id_t ctx1, gss_ctx_id_t ctx2, int conf)

{

    OM_uint32 major, minor;

    gss_iov_buffer_desc iov[4], stiov[2];

    gss_qop_t qop;

    gss_buffer_desc input, output;

    const char *string1 = "The swift brown fox jumped over the lazy dog.";

    const char *string2 = "Now is the time!";

    const char *string3 = "x";

    const char *string4 = "!@#";

    char data[1024], *fulltoken;

    size_t len;

    int oconf;

    ptrdiff_t offset;

    /* Wrap a standard token and unwrap it using the iov array. */

    memcpy(data, string1, strlen(string1) + 1);

    wrap_std(ctx1, data, iov, conf);

    check_encrypted("gss_wrap_iov(std1) encryption", conf, data, string1);

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, iov, 4);

    check_gsserr("gss_unwrap_iov(std1)", major, minor);

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(std1) conf/qop");

    if (iov[1].buffer.value != data || iov[1].buffer.length != strlen(string1))

        errout("gss_unwrap_iov(std1) data buffer");

    if (memcmp(data, string1, iov[1].buffer.length) != 0)

        errout("gss_unwrap_iov(std1) decryption");

    (void)gss_release_iov_buffer(&minor, iov, 4);

    /* Wrap a standard token and unwrap it using gss_unwrap(). */

    memcpy(data, string2, strlen(string2) + 1);

    wrap_std(ctx1, data, iov, conf);

    concat_iov(iov, 4, &fulltoken, &len;;

    input.value = fulltoken;

    input.length = len;

    major = gss_unwrap(&minor, ctx2, &input, &output, &oconf, &qop);

    check_gsserr("gss_unwrap(std2)", major, minor);

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap(std2) conf/qop");

    if (output.length != strlen(string2) ||

        memcmp(output.value, string2, output.length) != 0)

        errout("gss_unwrap(std2) decryption");

    (void)gss_release_buffer(&minor, &output);

    (void)gss_release_iov_buffer(&minor, iov, 4);

    free(fulltoken);

    /* Wrap a standard token and unwrap it using a stream buffer. */

    memcpy(data, string3, strlen(string3) + 1);

    wrap_std(ctx1, data, iov, conf);

    concat_iov(iov, 4, &fulltoken, &len;;

    stiov[0].type = GSS_IOV_BUFFER_TYPE_STREAM;

    stiov[0].buffer.value = fulltoken;

    stiov[0].buffer.length = len;

    stiov[1].type = GSS_IOV_BUFFER_TYPE_DATA;

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, stiov, 2);

    check_gsserr("gss_unwrap_iov(std3)", major, minor);

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(std3) conf/qop");

    if (stiov[1].buffer.length != strlen(string3) ||

        memcmp(stiov[1].buffer.value, string3, strlen(string3)) != 0)

        errout("gss_unwrap_iov(std3) decryption");

    offset = (char *)stiov[1].buffer.value - fulltoken;

    if (offset < 0 || (size_t)offset > len)

        errout("gss_unwrap_iov(std3) offset");

    (void)gss_release_iov_buffer(&minor, iov, 4);

    free(fulltoken);

    /* Wrap a token using gss_wrap and unwrap it using a stream buffer with

     * allocation and copying. */

    input.value = (char *)string4;

    input.length = strlen(string4);

    major = gss_wrap(&minor, ctx1, conf, GSS_C_QOP_DEFAULT, &input, &oconf,

                     &output);

    check_gsserr("gss_wrap(std4)", major, minor);

    if (oconf != conf)

        errout("gss_wrap(std4) conf");

    stiov[0].type = GSS_IOV_BUFFER_TYPE_STREAM;

    stiov[0].buffer = output;

    stiov[1].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, stiov, 2);

    check_gsserr("gss_unwrap_iov(std4)", major, minor);

    if (!(GSS_IOV_BUFFER_FLAGS(stiov[1].type) & GSS_IOV_BUFFER_FLAG_ALLOCATED))

        errout("gss_unwrap_iov(std4) allocated");

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(std4) conf/qop");

    if (stiov[1].buffer.length != strlen(string4) ||

        memcmp(stiov[1].buffer.value, string4, strlen(string4)) != 0)

        errout("gss_unwrap_iov(std4) decryption");

    (void)gss_release_buffer(&minor, &output);

    (void)gss_release_iov_buffer(&minor, stiov, 2);

}

/*

 * Wrap an AEAD token (HEADER | SIGN_ONLY | DATA | PADDING | TRAILER) using the

 * caller-provided array iov, which must have space for five elements, and the

 * caller-provided buffer data, which must be big enough to handle the test

 * inputs.  Library allocation will not be used.

 */

static void

wrap_aead(gss_ctx_id_t ctx, const char *sign, const char *wrap,

          gss_iov_buffer_desc *iov, char *data, int conf)

{

    OM_uint32 major, minor;

    int oconf;

    char *ptr;

    /* Lay out iov array. */

    iov[0].type = GSS_IOV_BUFFER_TYPE_HEADER;

    iov[1].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    iov[1].buffer.value = (char *)sign;

    iov[1].buffer.length = strlen(sign);

    iov[2].type = GSS_IOV_BUFFER_TYPE_DATA;

    iov[2].buffer.value = (char *)wrap;

    iov[2].buffer.length = strlen(wrap);

    iov[3].type = GSS_IOV_BUFFER_TYPE_PADDING;

    iov[4].type = GSS_IOV_BUFFER_TYPE_TRAILER;

    /* Get header/padding/trailer lengths. */

    major = gss_wrap_iov_length(&minor, ctx, conf, GSS_C_QOP_DEFAULT, &oconf,

                                iov, 5);

    check_gsserr("gss_wrap_iov_length(aead)", major, minor);

    if (oconf != conf)

        errout("gss_wrap_iov_length(aead) conf");

    if (iov[1].buffer.value != sign || iov[1].buffer.length != strlen(sign))

        errout("gss_wrap_iov_length(aead) sign-only buffer");

    if (iov[2].buffer.value != wrap || iov[2].buffer.length != strlen(wrap))

        errout("gss_wrap_iov_length(aead) data buffer");

    /* Set iov buffer pointers using returned lengths. */

    iov[0].buffer.value = data;

    ptr = data + iov[0].buffer.length;

    memcpy(ptr, wrap, strlen(wrap));

    iov[2].buffer.value = ptr;

    ptr += iov[2].buffer.length;

    iov[3].buffer.value = ptr;

    ptr += iov[3].buffer.length;

    iov[4].buffer.value = ptr;

    /* Wrap the AEAD token. */

    major = gss_wrap_iov(&minor, ctx, conf, GSS_C_QOP_DEFAULT, &oconf, iov, 5);

    check_gsserr("gss_wrap_iov(aead)", major, minor);

    if (oconf != conf)

        errout("gss_wrap_iov(aead) conf");

    if (iov[1].buffer.value != sign || iov[1].buffer.length != strlen(sign))

        errout("gss_wrap_iov(aead) sign-only buffer");

    if (iov[2].buffer.length != strlen(wrap))

        errout("gss_wrap_iov(aead) data buffer");

    check_encrypted("gss_wrap_iov(aead) encryption", conf, iov[2].buffer.value,

                    wrap);

}

/* Create AEAD tokens using gss_wrap_iov and ctx1, and make sure we can unwrap

 * them using ctx2 in all of the supported ways. */

static void

test_aead(gss_ctx_id_t ctx1, gss_ctx_id_t ctx2, int conf)

{

    OM_uint32 major, minor;

    gss_iov_buffer_desc iov[5], stiov[3];

    gss_qop_t qop;

    gss_buffer_desc input, assoc, output;

    const char *sign = "This data is only signed.";

    const char *wrap = "This data is wrapped in-place.";

    char data[1024], *fulltoken;

    size_t len;

    int oconf;

    ptrdiff_t offset;

    /* Wrap an AEAD token and unwrap it using the IOV array. */

    wrap_aead(ctx1, sign, wrap, iov, data, conf);

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, iov, 5);

    check_gsserr("gss_unwrap_iov(aead1)", major, minor);

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(aead1) conf/qop");

    if (iov[1].buffer.value != sign || iov[1].buffer.length != strlen(sign))

        errout("gss_unwrap_iov(aead1) sign-only buffer");

    if (iov[2].buffer.length != strlen(wrap) ||

        memcmp(iov[2].buffer.value, wrap, iov[2].buffer.length) != 0)

        errout("gss_unwrap_iov(aead1) decryption");

    /* Wrap an AEAD token and unwrap it using gss_unwrap_aead. */

    wrap_aead(ctx1, sign, wrap, iov, data, conf);

    concat_iov(iov, 5, &fulltoken, &len;;

    input.value = fulltoken;

    input.length = len;

    assoc.value = (char *)sign;

    assoc.length = strlen(sign);

    major = gss_unwrap_aead(&minor, ctx2, &input, &assoc, &output, &oconf,

                            &qop);

    check_gsserr("gss_unwrap_aead(aead2)", major, minor);

    if (output.length != strlen(wrap) ||

        memcmp(output.value, wrap, output.length) != 0)

        errout("gss_unwrap_aead(aead2) decryption");

    free(fulltoken);

    (void)gss_release_buffer(&minor, &output);

    /* Wrap an AEAD token and unwrap it using a stream buffer. */

    wrap_aead(ctx1, sign, wrap, iov, data, conf);

    concat_iov(iov, 5, &fulltoken, &len;;

    stiov[0].type = GSS_IOV_BUFFER_TYPE_STREAM;

    stiov[0].buffer.value = fulltoken;

    stiov[0].buffer.length = len;

    stiov[1].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    stiov[1].buffer.value = (char *)sign;

    stiov[1].buffer.length = strlen(sign);

    stiov[2].type = GSS_IOV_BUFFER_TYPE_DATA;

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, stiov, 3);

    check_gsserr("gss_unwrap_iov(aead3)", major, minor);

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(aead3) conf/qop");

    if (stiov[2].buffer.length != strlen(wrap) ||

        memcmp(stiov[2].buffer.value, wrap, strlen(wrap)) != 0)

        errout("gss_unwrap_iov(aead3) decryption");

    offset = (char *)stiov[2].buffer.value - fulltoken;

    if (offset < 0 || (size_t)offset > len)

        errout("gss_unwrap_iov(aead3) offset");

    free(fulltoken);

    (void)gss_release_iov_buffer(&minor, iov, 4);

    /* Wrap a token using gss_wrap_aead and unwrap it using a stream buffer

     * with allocation and copying. */

    input.value = (char *)wrap;

    input.length = strlen(wrap);

    assoc.value = (char *)sign;

    assoc.length = strlen(sign);

    major = gss_wrap_aead(&minor, ctx1, conf, GSS_C_QOP_DEFAULT, &assoc,

                          &input, &oconf, &output);

    check_gsserr("gss_wrap_aead(aead4)", major, minor);

    if (oconf != conf)

        errout("gss_wrap(aead4) conf");

    stiov[0].type = GSS_IOV_BUFFER_TYPE_STREAM;

    stiov[0].buffer = output;

    stiov[1].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    stiov[1].buffer = assoc;

    stiov[2].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, stiov, 3);

    check_gsserr("gss_unwrap_iov(aead4)", major, minor);

    if (!(GSS_IOV_BUFFER_FLAGS(stiov[2].type) & GSS_IOV_BUFFER_FLAG_ALLOCATED))

        errout("gss_unwrap_iov(aead4) allocated");

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(aead4) conf/qop");

    if (stiov[2].buffer.length != strlen(wrap) ||

        memcmp(stiov[2].buffer.value, wrap, strlen(wrap)) != 0)

        errout("gss_unwrap_iov(aead4) decryption");

    (void)gss_release_buffer(&minor, &output);

    (void)gss_release_iov_buffer(&minor, stiov, 3);

}

/*

 * Get a MIC for sign1, sign2, and sign3 using the caller-provided array iov,

 * which must have space for four elements, and the caller-provided buffer

 * data, which must be big enough for the MIC.  If data is NULL, the library

 * will be asked to allocate the MIC buffer.  The MIC will be located in

 * iov[3].buffer.

 */

static void

mic(gss_ctx_id_t ctx, const char *sign1, const char *sign2, const char *sign3,

    gss_iov_buffer_desc *iov, char *data)

{

    OM_uint32 minor, major;

    krb5_boolean allocated;

    /* Lay out iov array. */

    iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;

    iov[0].buffer.value = (char *)sign1;

    iov[0].buffer.length = strlen(sign1);

    iov[1].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    iov[1].buffer.value = (char *)sign2;

    iov[1].buffer.length = strlen(sign2);

    iov[2].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    iov[2].buffer.value = (char *)sign3;

    iov[2].buffer.length = strlen(sign3);

    iov[3].type = GSS_IOV_BUFFER_TYPE_MIC_TOKEN;

    if (data == NULL) {

        /* Ask the library to allocate the MIC buffer. */

        iov[3].type |= GSS_IOV_BUFFER_FLAG_ALLOCATE;

    } else {

        /* Get the MIC length and use the caller-provided buffer. */

        major = gss_get_mic_iov_length(&minor, ctx, GSS_C_QOP_DEFAULT, iov, 4);

        check_gsserr("gss_get_mic_iov_length", major, minor);

        iov[3].buffer.value = data;

    }

    major = gss_get_mic_iov(&minor, ctx, GSS_C_QOP_DEFAULT, iov, 4);

    check_gsserr("gss_get_mic_iov", major, minor);

    allocated = (GSS_IOV_BUFFER_FLAGS(iov[3].type) &

                 GSS_IOV_BUFFER_FLAG_ALLOCATED) != 0;

    if (allocated != (data == NULL))

        errout("gss_get_mic_iov allocated");

}

static void

test_mic(gss_ctx_id_t ctx1, gss_ctx_id_t ctx2)

{

    OM_uint32 major, minor;

    gss_iov_buffer_desc iov[4];

    gss_qop_t qop;

    gss_buffer_desc concatbuf, micbuf;

    const char *sign1 = "Data and sign-only ";

    const char *sign2 = "buffers are treated ";

    const char *sign3 = "equally by gss_get_mic_iov";

    char concat[1024], data[1024];

    (void)snprintf(concat, sizeof(concat), "%s%s%s", sign1, sign2, sign3);

    concatbuf.value = concat;

    concatbuf.length = strlen(concat);

    /* MIC with a caller-provided buffer and verify with the IOV array. */

    mic(ctx1, sign1, sign2, sign3, iov, data);

    major = gss_verify_mic_iov(&minor, ctx2, &qop, iov, 4);

    check_gsserr("gss_verify_mic_iov(mic1)", major, minor);

    if (qop != GSS_C_QOP_DEFAULT)

        errout("gss_verify_mic_iov(mic1) qop");

    /* MIC with an allocated buffer and verify with gss_verify_mic. */

    mic(ctx1, sign1, sign2, sign3, iov, NULL);

    major = gss_verify_mic(&minor, ctx2, &concatbuf, &iov[3].buffer, &qop);

    check_gsserr("gss_verify_mic(mic2)", major, minor);

    if (qop != GSS_C_QOP_DEFAULT)

        errout("gss_verify_mic(mic2) qop");

    (void)gss_release_iov_buffer(&minor, iov, 4);

    /* MIC with gss_c_get_mic and verify using the IOV array (which is still

     * mostly set up from the last call to mic(). */

    major = gss_get_mic(&minor, ctx1, GSS_C_QOP_DEFAULT, &concatbuf, &micbuf);

    check_gsserr("gss_get_mic(mic3)", major, minor);

    iov[3].buffer = micbuf;

    major = gss_verify_mic_iov(&minor, ctx2, &qop, iov, 4);

    check_gsserr("gss_verify_mic_iov(mic3)", major, minor);

    if (qop != GSS_C_QOP_DEFAULT)

        errout("gss_verify_mic_iov(mic3) qop");

    (void)gss_release_buffer(&minor, &micbuf);

}

/* Create a DCE-style token and make sure we can unwrap it. */

static void

test_dce(gss_ctx_id_t ctx1, gss_ctx_id_t ctx2, int conf)

{

    OM_uint32 major, minor;

    gss_iov_buffer_desc iov[4];

    gss_qop_t qop;

    const char *sign1 = "First data to be signed";

    const char *sign2 = "Second data to be signed";

    const char *wrap = "This data must align to 16 bytes";

    int oconf;

    char data[1024];

    /* Wrap a SIGN_ONLY_1 | DATA | SIGN_ONLY_2 | HEADER token. */

    memcpy(data, wrap, strlen(wrap) + 1);

    iov[0].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    iov[0].buffer.value = (char *)sign1;

    iov[0].buffer.length = strlen(sign1);

    iov[1].type = GSS_IOV_BUFFER_TYPE_DATA;

    iov[1].buffer.value = data;

    iov[1].buffer.length = strlen(wrap);

    iov[2].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;

    iov[2].buffer.value = (char *)sign2;

    iov[2].buffer.length = strlen(sign2);

    iov[3].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;

    major = gss_wrap_iov(&minor, ctx1, conf, GSS_C_QOP_DEFAULT, &oconf, iov,

                         4);

    check_gsserr("gss_wrap_iov(dce)", major, minor);

    if (oconf != conf)

        errout("gss_wrap_iov(dce) conf");

    if (iov[0].buffer.value != sign1 || iov[0].buffer.length != strlen(sign1))

        errout("gss_wrap_iov(dce) sign1 buffer");

    if (iov[1].buffer.value != data || iov[1].buffer.length != strlen(wrap))

        errout("gss_wrap_iov(dce) data buffer");

    if (iov[2].buffer.value != sign2 || iov[2].buffer.length != strlen(sign2))

        errout("gss_wrap_iov(dce) sign2 buffer");

    check_encrypted("gss_wrap_iov(dce) encryption", conf, data, wrap);

    /* Make sure we can unwrap it. */

    major = gss_unwrap_iov(&minor, ctx2, &oconf, &qop, iov, 4);

    check_gsserr("gss_unwrap_iov(std1)", major, minor);

    if (oconf != conf || qop != GSS_C_QOP_DEFAULT)

        errout("gss_unwrap_iov(std1) conf/qop");

    if (iov[0].buffer.value != sign1 || iov[0].buffer.length != strlen(sign1))

        errout("gss_unwrap_iov(dce) sign1 buffer");

    if (iov[1].buffer.value != data || iov[1].buffer.length != strlen(wrap))

        errout("gss_unwrap_iov(dce) data buffer");

    if (iov[2].buffer.value != sign2 || iov[2].buffer.length != strlen(sign2))

        errout("gss_unwrap_iov(dce) sign2 buffer");

    if (memcmp(data, wrap, iov[1].buffer.length) != 0)

        errout("gss_unwrap_iov(dce) decryption");

    (void)gss_release_iov_buffer(&minor, iov, 4);

}

int

main(int argc, char *argv[])

{

    OM_uint32 minor, flags;

    gss_OID mech = &mech_krb5;

    gss_name_t tname;

    gss_ctx_id_t ictx, actx;

    /* Parse arguments. */

    argv++;

    if (*argv != NULL && strcmp(*argv, "-s") == 0) {

        mech = &mech_spnego;

        argv++;

    }

    if (*argv == NULL || *(argv + 1) != NULL)

        errout("Usage: t_iov [-s] targetname");

    tname = import_name(*argv);

    flags = GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_MUTUAL_FLAG;

    establish_contexts(mech, GSS_C_NO_CREDENTIAL, GSS_C_NO_CREDENTIAL, tname,

                       flags, &ictx, &actx, NULL, NULL, NULL);

    /* Test standard token wrapping and unwrapping in both directions, with and

     * without confidentiality. */

    test_standard_wrap(ictx, actx, 0);

    test_standard_wrap(ictx, actx, 1);

    test_standard_wrap(actx, ictx, 0);

    test_standard_wrap(actx, ictx, 1);

    /* Test AEAD wrapping. */

    test_aead(ictx, actx, 0);

    test_aead(ictx, actx, 1);

    test_aead(actx, ictx, 0);

    test_aead(actx, ictx, 1);

    /* Test MIC tokens. */

    test_mic(ictx, actx);

    test_mic(actx, ictx);

    /* Test DCE wrapping with DCE-style contexts. */

    (void)gss_delete_sec_context(&minor, &ictx, NULL);

    (void)gss_delete_sec_context(&minor, &actx, NULL);

    flags = GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_DCE_STYLE;

    establish_contexts(mech, GSS_C_NO_CREDENTIAL, GSS_C_NO_CREDENTIAL, tname,

                       flags, &ictx, &actx, NULL, NULL, NULL);

    test_dce(ictx, actx, 0);

    test_dce(ictx, actx, 1);

    test_dce(actx, ictx, 0);

    test_dce(actx, ictx, 1);

    (void)gss_release_name(&minor, &tname);

    (void)gss_delete_sec_context(&minor, &ictx, NULL);

    (void)gss_delete_sec_context(&minor, &actx, NULL);

    return 0;

}