#include <stdio.h>
#include <errno.h>
#include "des_int.h"
#include "des.h"
char *progname;
int nflag = 2;
int vflag;
int mflag;
int zflag;
int pid;
int des_debug;
des_key_schedule KS;
unsigned char cipher_text[64];
unsigned char clear_text[64] = "Now is the time for all " ;
unsigned char clear_text2[64] = "7654321 Now is the time for ";
unsigned char clear_text3[64] = {2,0,0,0, 1,0,0,0};
unsigned char output[64];
unsigned char zero_text[8] = {0x0,0,0,0,0,0,0,0};
unsigned char msb_text[8] = {0x0,0,0,0, 0,0,0,0x40};
unsigned char *input;
unsigned char default_key[8] = {
0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef
};
unsigned char key2[8] = { 0x08,0x19,0x2a,0x3b,0x4c,0x5d,0x6e,0x7f };
unsigned char key3[8] = { 0x80,1,1,1,1,1,1,1 };
des_cblock s_key;
unsigned char default_ivec[8] = {
0x12,0x34,0x56,0x78,0x90,0xab,0xcd,0xef
};
unsigned char *ivec;
unsigned char zero_key[8] = {1,1,1,1,1,1,1,1};
int i,j;
unsigned char cipher1[8] = {
0x25,0xdd,0xac,0x3e,0x96,0x17,0x64,0x67
};
unsigned char cipher2[8] = {
0x3f,0xa4,0x0e,0x8a,0x98,0x4d,0x48,0x15
};
unsigned char cipher3[64] = {
0xe5,0xc7,0xcd,0xde,0x87,0x2b,0xf2,0x7c,
0x43,0xe9,0x34,0x00,0x8c,0x38,0x9c,0x0f,
0x68,0x37,0x88,0x49,0x9a,0x7c,0x05,0xf6
};
unsigned char checksum[8] = {
0x58,0xd2,0xe7,0x7e,0x86,0x06,0x27,0x33
};
unsigned char zresult[8] = {
0x8c, 0xa6, 0x4d, 0xe9, 0xc1, 0xb1, 0x23, 0xa7
};
unsigned char mresult[8] = {
0xa3, 0x80, 0xe0, 0x2a, 0x6b, 0xe5, 0x46, 0x96
};
void do_encrypt (unsigned char *, unsigned char *);
void do_decrypt (unsigned char *, unsigned char *);
int
main(argc,argv)
int argc;
char *argv[];
{
unsigned long in_length;
progname=argv[0];
while (--argc > 0 && (*++argv)[0] == '-')
for (i=1; argv[0][i] != '\0'; i++) {
switch (argv[0][i]) {
case 'd':
des_debug=3;
continue;
case 'z':
zflag = 1;
continue;
case 'm':
mflag = 1;
continue;
default:
printf("%s: illegal flag \"%c\" ",
progname,argv[0][i]);
exit(1);
}
};
if (argc) {
fprintf(stderr, "Usage: %s [-dmz]\n", progname);
exit(1);
}
if (zflag) {
input = zero_text;
des_key_sched(zero_key,KS);
printf("plaintext = key = 0, cipher = 0x8ca64de9c1b123a7\n");
do_encrypt(input,cipher_text);
printf("\tcipher = (low to high bytes)\n\t\t");
for (j = 0; j<=7; j++)
printf("%02x ",cipher_text[j]);
printf("\n");
do_decrypt(output,cipher_text);
if ( memcmp((char *)cipher_text, (char *)zresult, 8) ) {
printf("verify: error in zero key test\n");
exit(-1);
}
exit(0);
}
if (mflag) {
input = msb_text;
des_key_sched(key3,KS);
printf("plaintext = 0x00 00 00 00 00 00 00 40, ");
printf("key = 0, cipher = 0x??\n");
do_encrypt(input,cipher_text);
printf("\tcipher = (low to high bytes)\n\t\t");
for (j = 0; j<=7; j++) {
printf("%02x ",cipher_text[j]);
}
printf("\n");
do_decrypt(output,cipher_text);
if ( memcmp((char *)cipher_text, (char *)mresult, 8) ) {
printf("verify: error in msb test\n");
exit(-1);
}
exit(0);
}
{
input = zero_text;
des_key_sched(key2,KS);
printf("Examples per FIPS publication 81, keys ivs and cipher\n");
printf("in hex. These are the correct answers, see below for\n");
printf("the actual answers.\n\n");
printf("Examples per Davies and Price.\n\n");
printf("EXAMPLE ECB\tkey = 08192a3b4c5d6e7f\n");
printf("\tclear = 0\n");
printf("\tcipher = 25 dd ac 3e 96 17 64 67\n");
printf("ACTUAL ECB\n");
printf("\tclear \"%s\"\n", input);
do_encrypt(input,cipher_text);
printf("\tcipher = (low to high bytes)\n\t\t");
for (j = 0; j<=7; j++)
printf("%02x ",cipher_text[j]);
printf("\n\n");
do_decrypt(output,cipher_text);
if ( memcmp((char *)cipher_text, (char *)cipher1, 8) ) {
printf("verify: error in ECB encryption\n");
exit(-1);
}
else
printf("verify: ECB encription is correct\n\n");
}
{
des_key_sched(default_key,KS);
input = clear_text;
ivec = default_ivec;
printf("EXAMPLE ECB\tkey = 0123456789abcdef\n");
printf("\tclear = \"Now is the time for all \"\n");
printf("\tcipher = 3f a4 0e 8a 98 4d 48 15 ...\n");
printf("ACTUAL ECB\n\tclear \"%s\"",input);
do_encrypt(input,cipher_text);
printf("\n\tcipher = (low to high bytes)\n\t\t");
for (j = 0; j<=7; j++) {
printf("%02x ",cipher_text[j]);
}
printf("\n\n");
do_decrypt(output,cipher_text);
if ( memcmp((char *)cipher_text, (char *)cipher2, 8) ) {
printf("verify: error in ECB encryption\n");
exit(-1);
}
else
printf("verify: ECB encription is correct\n\n");
}
printf("EXAMPLE CBC\tkey = 0123456789abcdef");
printf("\tiv = 1234567890abcdef\n");
printf("\tclear = \"Now is the time for all \"\n");
printf("\tcipher =\te5 c7 cd de 87 2b f2 7c\n");
printf("\t\t\t43 e9 34 00 8c 38 9c 0f\n");
printf("\t\t\t68 37 88 49 9a 7c 05 f6\n");
printf("ACTUAL CBC\n\tclear \"%s\"\n",input);
in_length = strlen((char *) input);
des_cbc_encrypt(input,cipher_text, in_length,KS,ivec,1);
printf("\tciphertext = (low to high bytes)\n");
for (i = 0; i <= 7; i++) {
printf("\t\t");
for (j = 0; j <= 7; j++) {
printf("%02x ",cipher_text[i*8+j]);
}
printf("\n");
}
des_cbc_encrypt(cipher_text,clear_text,in_length,KS,ivec,0);
printf("\tdecrypted clear_text = \"%s\"\n",clear_text);
if ( memcmp(cipher_text, cipher3, (size_t) in_length) ) {
printf("verify: error in CBC encryption\n");
exit(-1);
}
else
printf("verify: CBC encription is correct\n\n");
printf("EXAMPLE CBC checksum");
printf("\tkey = 0123456789abcdef\tiv = 1234567890abcdef\n");
printf("\tclear =\t\t\"7654321 Now is the time for \"\n");
printf("\tchecksum\t58 d2 e7 7e 86 06 27 33, ");
printf("or some part thereof\n");
input = clear_text2;
des_cbc_cksum(input,cipher_text,(long) strlen((char *) input),KS,ivec);
printf("ACTUAL CBC checksum\n");
printf("\t\tencrypted cksum = (low to high bytes)\n\t\t");
for (j = 0; j<=7; j++)
printf("%02x ",cipher_text[j]);
printf("\n\n");
if ( memcmp((char *)cipher_text, (char *)checksum, 8) ) {
printf("verify: error in CBC cheksum\n");
exit(-1);
}
else
printf("verify: CBC checksum is correct\n\n");
exit(0);
}
void
do_encrypt(in,out)
unsigned char *in;
unsigned char *out;
{
for (i =1; i<=nflag; i++) {
des_ecb_encrypt((unsigned long *) in, (unsigned long *)out, KS, 1);
if (des_debug) {
printf("\nclear %s\n",in);
for (j = 0; j<=7; j++)
printf("%02X ",in[j] & 0xff);
printf("\tcipher ");
for (j = 0; j<=7; j++)
printf("%02X ",out[j] & 0xff);
}
}
}
void
do_decrypt(in,out)
unsigned char *out;
unsigned char *in;
{
for (i =1; i<=nflag; i++) {
des_ecb_encrypt((unsigned long *) out, (unsigned long *)in,KS,0);
if (des_debug) {
printf("clear %s\n",in);
for (j = 0; j<=7; j++)
printf("%02X ",in[j] & 0xff);
printf("\tcipher ");
for (j = 0; j<=7; j++)
printf("%02X ",out[j] & 0xff);
}
}
}