/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2021 Tintri by DDN, Inc. All rights reserved.
 */

#include <sys/types.h>
#include <smbsrv/smb_kcrypt.h>
#include <security/cryptoki.h>
#include <security/pkcs11.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>

#include "test_data.h"
#include "utils.h"

/*
 * Test program for the interfaces used in
 * smb3_decrypt_command()
 */
int
do_decrypt(char *outbuf, size_t *outlen,
    const uint8_t *inbuf, size_t inlen, int mid)
{
        smb_enc_ctx_t ctx;
        uio_t uio_in;
        uio_t uio_out;
        iovec_t iov_in[4];
        iovec_t iov_out[4];
        int rc;

        bzero(&ctx, sizeof (ctx));
        ctx.mech.mechanism = mid; // CKM_AES_CCM or CKM_AES_GCM

        switch (mid) {

        case CKM_AES_CCM:
                smb3_crypto_init_ccm_param(&ctx,
                    (uint8_t *)nonce, 11,
                    (uint8_t *)authdata, 16,
                    inlen);
                break;

        case CKM_AES_GCM:
                smb3_crypto_init_gcm_param(&ctx,
                    (uint8_t *)nonce, 12,
                    (uint8_t *)authdata, 16);
                break;

        default:
                return (1);
        }

        rc = smb3_decrypt_init(&ctx,
            (uint8_t *)keydata, 16);
        if (rc != 0)
                return (rc);

        make_uio((void *)inbuf, inlen, &uio_in, iov_in, 4);
        make_uio(outbuf, *outlen, &uio_out, iov_out, 4);
        *outlen = uio_out.uio_resid;

        rc = smb3_decrypt_uio(&ctx, &uio_in, &uio_out);
        *outlen -= uio_out.uio_resid;

        smb3_enc_ctx_done(&ctx);

        return (rc);
}

char outbuf[CLEAR_DATA_LEN];

void
test_decrypt(const uint8_t *cipher, int mid)
{
        size_t outlen;
        int rc;

        outlen = sizeof (outbuf);
        rc = do_decrypt(outbuf, &outlen,
            cipher, CIPHER_DATA_LEN, mid);
        if (rc != 0) {
                printf("FAIL: decrypt rc= %d\n");
                return;
        }

        if (outlen != CLEAR_DATA_LEN) {
                printf("FAIL: out len = %d (want %d)\n",
                    outlen, CLEAR_DATA_LEN);
                return;
        }

        if (memcmp(outbuf, clear_data_ref, CLEAR_DATA_LEN) != 0) {
                printf("FAIL: ciphertext:\n");
                hexdump((uchar_t *)outbuf, CLEAR_DATA_LEN);
                return;
        }

        printf("PASS mid=0x%x\n", mid);
}

int
main(int argc, char *argv[])
{

        test_decrypt(cipher_data_ccm, CKM_AES_CCM);
        test_decrypt(cipher_data_gcm, CKM_AES_GCM);

        return (0);
}