/* ====================================================================
 * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 *
 */
/* --------------------------------------------
  NIST DES Modes of Operation Validation System
  Test Program

  Based on the AES Validation Suite, which was:
  Donated to OpenSSL by:
  V-ONE Corporation
  20250 Century Blvd, Suite 300
  Germantown, MD 20874
  U.S.A.
  ----------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <ctype.h>
#include <openssl/des.h>
#include <openssl/evp.h>
#include <openssl/bn.h>

#include <openssl/err.h>
#include "e_os.h"

#ifndef OPENSSL_FIPS

int main(int argc, char *argv[])
{
    printf("No FIPS DES support\n");
    return (0);
}

#else

# include <openssl/fips.h>
# include "fips_utl.h"

# define DES_BLOCK_SIZE 8

# define VERBOSE 0

static int DESTest(EVP_CIPHER_CTX *ctx,
                   char *amode, int akeysz, unsigned char *aKey,
                   unsigned char *iVec,
                   /* 0 = decrypt, 1 = encrypt */
                   int dir, unsigned char *out, unsigned char *in, int len)
{
    const EVP_CIPHER *cipher = NULL;

    if (akeysz != 192) {
        printf("Invalid key size: %d\n", akeysz);
        EXIT(1);
    }

    if (strcasecmp(amode, "CBC") == 0)
        cipher = EVP_des_ede3_cbc();
    else if (strcasecmp(amode, "ECB") == 0)
        cipher = EVP_des_ede3_ecb();
    else if (strcasecmp(amode, "CFB64") == 0)
        cipher = EVP_des_ede3_cfb64();
    else if (strncasecmp(amode, "OFB", 3) == 0)
        cipher = EVP_des_ede3_ofb();
    else if (!strcasecmp(amode, "CFB8"))
        cipher = EVP_des_ede3_cfb8();
    else if (!strcasecmp(amode, "CFB1"))
        cipher = EVP_des_ede3_cfb1();
    else {
        printf("Unknown mode: %s\n", amode);
        EXIT(1);
    }

    if (EVP_CipherInit_ex(ctx, cipher, NULL, aKey, iVec, dir) <= 0)
        return 0;
    if (!strcasecmp(amode, "CFB1"))
        M_EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS);
    EVP_Cipher(ctx, out, in, len);

    return 1;
}

# if 0
static void DebugValue(char *tag, unsigned char *val, int len)
{
    char obuf[2048];
    int olen;
    olen = bin2hex(val, len, obuf);
    printf("%s = %.*s\n", tag, olen, obuf);
}
# endif
static void shiftin(unsigned char *dst, unsigned char *src, int nbits)
{
    int n;

    /* move the bytes... */
    memmove(dst, dst + nbits / 8, 3 * 8 - nbits / 8);
    /* append new data */
    memcpy(dst + 3 * 8 - nbits / 8, src, (nbits + 7) / 8);
    /* left shift the bits */
    if (nbits % 8)
        for (n = 0; n < 3 * 8; ++n)
            dst[n] =
                (dst[n] << (nbits % 8)) | (dst[n + 1] >> (8 - nbits % 8));
}

/* ---------------------------------------------*/
char *t_tag[2] = { "PLAINTEXT", "CIPHERTEXT" };
char *t_mode[6] = { "CBC", "ECB", "OFB", "CFB1", "CFB8", "CFB64" };
enum Mode { CBC, ECB, OFB, CFB1, CFB8, CFB64 };
int Sizes[6] = { 64, 64, 64, 1, 8, 64 };

static void do_mct(char *amode,
                   int akeysz, int numkeys, unsigned char *akey,
                   unsigned char *ivec, int dir, unsigned char *text, int len,
                   FILE *rfp)
{
    int i, imode;
    unsigned char nk[4 * 8];    /* longest key+8 */
    unsigned char text0[8];

    for (imode = 0; imode < 6; ++imode)
        if (!strcmp(amode, t_mode[imode]))
            break;
    if (imode == 6) {
        printf("Unrecognized mode: %s\n", amode);
        EXIT(1);
    }

    for (i = 0; i < 400; ++i) {
        int j;
        int n;
        int kp = akeysz / 64;
        unsigned char old_iv[8];
        EVP_CIPHER_CTX ctx;
        EVP_CIPHER_CTX_init(&ctx);

        fprintf(rfp, "\nCOUNT = %d\n", i);
        if (kp == 1)
            OutputValue("KEY", akey, 8, rfp, 0);
        else
            for (n = 0; n < kp; ++n) {
                fprintf(rfp, "KEY%d", n + 1);
                OutputValue("", akey + n * 8, 8, rfp, 0);
            }

        if (imode != ECB)
            OutputValue("IV", ivec, 8, rfp, 0);
        OutputValue(t_tag[dir ^ 1], text, len, rfp, imode == CFB1);
# if 0
        /* compensate for endianness */
        if (imode == CFB1)
            text[0] <<= 7;
# endif
        memcpy(text0, text, 8);

        for (j = 0; j < 10000; ++j) {
            unsigned char old_text[8];

            memcpy(old_text, text, 8);
            if (j == 0) {
                memcpy(old_iv, ivec, 8);
                DESTest(&ctx, amode, akeysz, akey, ivec, dir, text, text,
                        len);
            } else {
                memcpy(old_iv, ctx.iv, 8);
                EVP_Cipher(&ctx, text, text, len);
            }
            if (j == 9999) {
                OutputValue(t_tag[dir], text, len, rfp, imode == CFB1);
                /*              memcpy(ivec,text,8); */
            }
            /*      DebugValue("iv",ctx.iv,8); */
            /* accumulate material for the next key */
            shiftin(nk, text, Sizes[imode]);
            /*      DebugValue("nk",nk,24); */
            if ((dir && (imode == CFB1 || imode == CFB8 || imode == CFB64
                         || imode == CBC)) || imode == OFB)
                memcpy(text, old_iv, 8);

            if (!dir && (imode == CFB1 || imode == CFB8 || imode == CFB64)) {
                /*
                 * the test specifies using the output of the raw DES
                 * operation which we don't have, so reconstruct it...
                 */
                for (n = 0; n < 8; ++n)
                    text[n] ^= old_text[n];
            }
        }
        for (n = 0; n < 8; ++n)
            akey[n] ^= nk[16 + n];
        for (n = 0; n < 8; ++n)
            akey[8 + n] ^= nk[8 + n];
        for (n = 0; n < 8; ++n)
            akey[16 + n] ^= nk[n];
        if (numkeys < 3)
            memcpy(&akey[2 * 8], akey, 8);
        if (numkeys < 2)
            memcpy(&akey[8], akey, 8);
        DES_set_odd_parity((DES_cblock *)akey);
        DES_set_odd_parity((DES_cblock *)(akey + 8));
        DES_set_odd_parity((DES_cblock *)(akey + 16));
        memcpy(ivec, ctx.iv, 8);

        /*
         * pointless exercise - the final text doesn't depend on the initial
         * text in OFB mode, so who cares what it is? (Who designed these
         * tests?)
         */
        if (imode == OFB)
            for (n = 0; n < 8; ++n)
                text[n] = text0[n] ^ old_iv[n];
    }
}

static int proc_file(char *rqfile, char *rspfile)
{
    char afn[256], rfn[256];
    FILE *afp = NULL, *rfp = NULL;
    char ibuf[2048], tbuf[2048];
    int ilen, len, ret = 0;
    char amode[8] = "";
    char atest[100] = "";
    int akeysz = 0;
    unsigned char iVec[20], aKey[40];
    int dir = -1, err = 0, step = 0;
    unsigned char plaintext[2048];
    unsigned char ciphertext[2048];
    char *rp;
    EVP_CIPHER_CTX ctx;
    int numkeys = 1;
    EVP_CIPHER_CTX_init(&ctx);

    if (!rqfile || !(*rqfile)) {
        printf("No req file\n");
        return -1;
    }
    strcpy(afn, rqfile);

    if ((afp = fopen(afn, "r")) == NULL) {
        printf("Cannot open file: %s, %s\n", afn, strerror(errno));
        return -1;
    }
    if (!rspfile) {
        strcpy(rfn, afn);
        rp = strstr(rfn, "req/");
# ifdef OPENSSL_SYS_WIN32
        if (!rp)
            rp = strstr(rfn, "req\\");
# endif
        assert(rp);
        memcpy(rp, "rsp", 3);
        rp = strstr(rfn, ".req");
        memcpy(rp, ".rsp", 4);
        rspfile = rfn;
    }
    if ((rfp = fopen(rspfile, "w")) == NULL) {
        printf("Cannot open file: %s, %s\n", rfn, strerror(errno));
        fclose(afp);
        afp = NULL;
        return -1;
    }
    while (!err && (fgets(ibuf, sizeof(ibuf), afp)) != NULL) {
        tidy_line(tbuf, ibuf);
        ilen = strlen(ibuf);
        /*      printf("step=%d ibuf=%s",step,ibuf); */
        if (step == 3 && !strcmp(amode, "ECB")) {
            memset(iVec, 0, sizeof(iVec));
            step = (dir) ? 4 : 5; /* no ivec for ECB */
        }
        switch (step) {
        case 0:                /* read preamble */
            if (ibuf[0] == '\n') { /* end of preamble */
                if (*amode == '\0') {
                    printf("Missing Mode\n");
                    err = 1;
                } else {
                    fputs(ibuf, rfp);
                    ++step;
                }
            } else if (ibuf[0] != '#') {
                printf("Invalid preamble item: %s\n", ibuf);
                err = 1;
            } else {            /* process preamble */
                char *xp, *pp = ibuf + 2;
                int n;
                if (*amode) {   /* insert current time & date */
                    time_t rtim = time(0);
                    fprintf(rfp, "# %s", ctime(&rtim));
                } else {
                    fputs(ibuf, rfp);
                    if (!strncmp(pp, "INVERSE ", 8) || !strncmp(pp, "DES ", 4)
                        || !strncmp(pp, "TDES ", 5)
                        || !strncmp(pp, "PERMUTATION ", 12)
                        || !strncmp(pp, "SUBSTITUTION ", 13)
                        || !strncmp(pp, "VARIABLE ", 9)) {
                        /* get test type */
                        if (!strncmp(pp, "DES ", 4))
                            pp += 4;
                        else if (!strncmp(pp, "TDES ", 5))
                            pp += 5;
                        xp = strchr(pp, ' ');
                        n = xp - pp;
                        strncpy(atest, pp, n);
                        atest[n] = '\0';
                        /* get mode */
                        xp = strrchr(pp, ' '); /* get mode" */
                        n = strlen(xp + 1) - 1;
                        strncpy(amode, xp + 1, n);
                        amode[n] = '\0';
                        /* amode[3] = '\0'; */
                        if (VERBOSE)
                            printf("Test=%s, Mode=%s\n", atest, amode);
                    }
                }
            }
            break;

        case 1:                /* [ENCRYPT] | [DECRYPT] */
            if (ibuf[0] == '\n')
                break;
            if (ibuf[0] == '[') {
                fputs(ibuf, rfp);
                ++step;
                if (strncasecmp(ibuf, "[ENCRYPT]", 9) == 0)
                    dir = 1;
                else if (strncasecmp(ibuf, "[DECRYPT]", 9) == 0)
                    dir = 0;
                else {
                    printf("Invalid keyword: %s\n", ibuf);
                    err = 1;
                }
                break;
            } else if (dir == -1) {
                err = 1;
                printf("Missing ENCRYPT/DECRYPT keyword\n");
                break;
            } else
                step = 2;

        case 2:                /* KEY = xxxx */
            if (*ibuf == '\n') {
                fputs(ibuf, rfp);
                break;
            }
            if (!strncasecmp(ibuf, "COUNT = ", 8)) {
                fputs(ibuf, rfp);
                break;
            }
            if (!strncasecmp(ibuf, "COUNT=", 6)) {
                fputs(ibuf, rfp);
                break;
            }
            if (!strncasecmp(ibuf, "NumKeys = ", 10)) {
                numkeys = atoi(ibuf + 10);
                break;
            }

            fputs(ibuf, rfp);
            if (!strncasecmp(ibuf, "KEY = ", 6)) {
                akeysz = 64;
                len = hex2bin((char *)ibuf + 6, aKey);
                if (len < 0) {
                    printf("Invalid KEY\n");
                    err = 1;
                    break;
                }
                PrintValue("KEY", aKey, len);
                ++step;
            } else if (!strncasecmp(ibuf, "KEYs = ", 7)) {
                akeysz = 64 * 3;
                len = hex2bin(ibuf + 7, aKey);
                if (len != 8) {
                    printf("Invalid KEY\n");
                    err = 1;
                    break;
                }
                memcpy(aKey + 8, aKey, 8);
                memcpy(aKey + 16, aKey, 8);
                ibuf[4] = '\0';
                PrintValue("KEYs", aKey, len);
                ++step;
            } else if (!strncasecmp(ibuf, "KEY", 3)) {
                int n = ibuf[3] - '1';

                akeysz = 64 * 3;
                len = hex2bin(ibuf + 7, aKey + n * 8);
                if (len != 8) {
                    printf("Invalid KEY\n");
                    err = 1;
                    break;
                }
                ibuf[4] = '\0';
                PrintValue(ibuf, aKey, len);
                if (n == 2)
                    ++step;
            } else {
                printf("Missing KEY\n");
                err = 1;
            }
            break;

        case 3:                /* IV = xxxx */
            fputs(ibuf, rfp);
            if (strncasecmp(ibuf, "IV = ", 5) != 0) {
                printf("Missing IV\n");
                err = 1;
            } else {
                len = hex2bin((char *)ibuf + 5, iVec);
                if (len < 0) {
                    printf("Invalid IV\n");
                    err = 1;
                    break;
                }
                PrintValue("IV", iVec, len);
                step = (dir) ? 4 : 5;
            }
            break;

        case 4:                /* PLAINTEXT = xxxx */
            fputs(ibuf, rfp);
            if (strncasecmp(ibuf, "PLAINTEXT = ", 12) != 0) {
                printf("Missing PLAINTEXT\n");
                err = 1;
            } else {
                int nn = strlen(ibuf + 12);
                if (!strcmp(amode, "CFB1"))
                    len = bint2bin(ibuf + 12, nn - 1, plaintext);
                else
                    len = hex2bin(ibuf + 12, plaintext);
                if (len < 0) {
                    printf("Invalid PLAINTEXT: %s", ibuf + 12);
                    err = 1;
                    break;
                }
                if (len >= (int)sizeof(plaintext)) {
                    printf("Buffer overflow\n");
                }
                PrintValue("PLAINTEXT", (unsigned char *)plaintext, len);
                if (strcmp(atest, "Monte") == 0) { /* Monte Carlo Test */
                    do_mct(amode, akeysz, numkeys, aKey, iVec, dir, plaintext,
                           len, rfp);
                } else {
                    assert(dir == 1);
                    ret = DESTest(&ctx, amode, akeysz, aKey, iVec,
                                  /* 0 = decrypt, 1 = encrypt */
                                  dir, ciphertext, plaintext, len);
                    OutputValue("CIPHERTEXT", ciphertext, len, rfp,
                                !strcmp(amode, "CFB1"));
                }
                step = 6;
            }
            break;

        case 5:                /* CIPHERTEXT = xxxx */
            fputs(ibuf, rfp);
            if (strncasecmp(ibuf, "CIPHERTEXT = ", 13) != 0) {
                printf("Missing KEY\n");
                err = 1;
            } else {
                if (!strcmp(amode, "CFB1"))
                    len =
                        bint2bin(ibuf + 13, strlen(ibuf + 13) - 1,
                                 ciphertext);
                else
                    len = hex2bin(ibuf + 13, ciphertext);
                if (len < 0) {
                    printf("Invalid CIPHERTEXT\n");
                    err = 1;
                    break;
                }

                PrintValue("CIPHERTEXT", ciphertext, len);
                if (strcmp(atest, "Monte") == 0) { /* Monte Carlo Test */
                    do_mct(amode, akeysz, numkeys, aKey, iVec,
                           dir, ciphertext, len, rfp);
                } else {
                    assert(dir == 0);
                    ret = DESTest(&ctx, amode, akeysz, aKey, iVec,
                                  /* 0 = decrypt, 1 = encrypt */
                                  dir, plaintext, ciphertext, len);
                    OutputValue("PLAINTEXT", (unsigned char *)plaintext, len,
                                rfp, !strcmp(amode, "CFB1"));
                }
                step = 6;
            }
            break;

        case 6:
            if (ibuf[0] != '\n') {
                err = 1;
                printf("Missing terminator\n");
            } else if (strcmp(atest, "MCT") != 0) { /* MCT already added
                                                     * terminating nl */
                fputs(ibuf, rfp);
            }
            step = 1;
            break;
        }
    }
    if (rfp)
        fclose(rfp);
    if (afp)
        fclose(afp);
    return err;
}

/* -------------------------------------------------
  Processes either a single file or
  a set of files whose names are passed in a file.
  A single file is specified as:
    aes_test -f xxx.req
  A set of files is specified as:
    aes_test -d xxxxx.xxx
  The default is: -d req.txt
--------------------------------------------------*/
int main(int argc, char **argv)
{
    char *rqlist = "req.txt", *rspfile = NULL;
    FILE *fp = NULL;
    char fn[250] = "", rfn[256] = "";
    int f_opt = 0, d_opt = 1;

# ifdef OPENSSL_FIPS
    if (!FIPS_mode_set(1)) {
        do_print_errors();
        EXIT(1);
    }
# endif
    if (argc > 1) {
        if (strcasecmp(argv[1], "-d") == 0) {
            d_opt = 1;
        } else if (strcasecmp(argv[1], "-f") == 0) {
            f_opt = 1;
            d_opt = 0;
        } else {
            printf("Invalid parameter: %s\n", argv[1]);
            return 0;
        }
        if (argc < 3) {
            printf("Missing parameter\n");
            return 0;
        }
        if (d_opt)
            rqlist = argv[2];
        else {
            strcpy(fn, argv[2]);
            rspfile = argv[3];
        }
    }
    if (d_opt) {                /* list of files (directory) */
        if (!(fp = fopen(rqlist, "r"))) {
            printf("Cannot open req list file\n");
            return -1;
        }
        while (fgets(fn, sizeof(fn), fp)) {
            strtok(fn, "\r\n");
            strcpy(rfn, fn);
            printf("Processing: %s\n", rfn);
            if (proc_file(rfn, rspfile)) {
                printf(">>> Processing failed for: %s <<<\n", rfn);
                EXIT(1);
            }
        }
        fclose(fp);
    } else {                    /* single file */

        if (VERBOSE)
            printf("Processing: %s\n", fn);
        if (proc_file(fn, rspfile)) {
            printf(">>> Processing failed for: %s <<<\n", fn);
        }
    }
    EXIT(0);
    return 0;
}

#endif
