The sample plaintext file (data) is listed below. The sample cipherfile (DES3CIPH.out) is not listed here, because the characters in the file create problems for text editors and html, and thus are not handled properly by web browsers.
import java.io.*;
import java.security.*;
import java.math.*;
import cryptix.util.core.BI;
import cryptix.util.core.ArrayUtil;
import cryptix.util.core.Hex;
import cryptix.provider.key.*;
class test3des2 {
public static void main (String[] args) {
try {
FileOutputStream outFile1 = new FileOutputStream("DES-EDE3.out");
FileOutputStream outFile2 = new FileOutputStream("DES3CIPH.out");
//PrintStream is deprecated, but works fine in jdk1.1.7b
PrintStream output1 = new PrintStream(outFile1);
PrintStream output2 = new PrintStream(outFile2);
//generate key for file encryption
SecureRandom random = new SecureRandom();
KeyGenerator keygen = KeyGenerator.getInstance("DES-EDE3");
keygen.initialize(random);
Key key = keygen.generateKey();
RawKey rkey = (RawKey) key;
byte[] yval = rkey.getEncoded();
BigInteger Bkey = new BigInteger(yval);
String w = cryptix.util.core.BI.dumpString(Bkey);
output1.println("The Encryption Key = " + w);
// define the encryption mode and initialize it
Cipher des=Cipher.getInstance("DES-EDE3/ECB/PKCS#5","Cryptix");
des.initEncrypt(key);
// read in the input file
FileInputStream fis = new FileInputStream(args[0]);
byte b;
int bi;
char bc;
byte bb[] = new byte[1024];
int count=0;
output1.println("This is a copy of the input file: ");
output1.println(" ");
while (fis.available() != 0) {
b = (byte) fis.read();
bi = (int) b;
bc = (char) b;
output1.print(bc);
bb[count] = b;
count++;
};
output1.print("\n");
output1.print("\n");
output1.println("The number of bytes in the plaintext input file is = " + count);
fis.close();
// do the encryption
int remain = count%8;
int pcount = count;
output1.println("The new number of bytes in the plaintext input file is = " + pcount);
byte[] bt = new byte[pcount];
int i;
for(i=0;i<pcount;i++) bt[i] = bb[i];
byte[] ciphertext = des.crypt(bt);
output1.print(" ");
output1.println("ciphertext.length = " + ciphertext.length);
// print out representation of ciphertext to general output file
BigInteger Bciph = new BigInteger(ciphertext);
w = cryptix.util.core.BI.dumpString(Bciph);
output1.println("Ciphertext = " + w);
// print ciphertext to ciphertext specific file
output2.write(ciphertext,0,ciphertext.length);
output2.close();
// decrypt ciphertext from memeory
des.initDecrypt(key);
byte[] decrypted = des.crypt(ciphertext);
BigInteger Bplain = new BigInteger(decrypted);
w = cryptix.util.core.BI.dumpString(Bplain);
output1.println("Plaintext (decrypted from memory) = " + w);
// write the decrypted bytes to general outputfile
char c;
output1.println("Following is a copy of the decrypted (from memory) bytes: ");
output1.print("\n");
for(i=0;i<count;i++) {
c = (char) decrypted[i];
output1.print(c);
}
output1.println(" ");
// read in ciphertext from file
fis = new FileInputStream("DES3CIPH.out");
bb = new byte[1024];
pcount=0;
while (fis.available() != 0) {
b = (byte) fis.read();
bb[pcount] = b;
pcount++;
};
output1.print("\n");
output1.println("The number of bytes in the ciphertext input file is " + pcount);
fis.close();
des.initDecrypt(key);
bt = new byte[pcount];
for(i=0;i<pcount;i++) bt[i] = bb[i];
decrypted = des.crypt(bt);
Bplain = new BigInteger(decrypted);
w = cryptix.util.core.BI.dumpString(Bplain);
output1.println("Plaintext (decrypted from cipher file) = " + w);
// write the decrypted bytes to the general output file
output1.println("Following is a copy of the decrypted (from cipher file) bytes: ");
output1.print("\n");
for(i=0;i<count;i++) {
c = (char) decrypted[i];
output1.print(c);
}
output1.println(" ");
output1.close();
} catch (Exception e) {
System.err.println("Caught exception " + e.toString());
}
}}
Senator Hand N. Till Washington, DC Dear Senator: This letter is to inform you we have opened account no. 338907021 on your behalf, and deposted therein a legislative incentive payment of $1 million. For withdrawl, you will need to use your password BJRGUD7693. Yours very truly, Arnold C. Creole Vice President Greater Caribbean Bank
The Encryption Key = Multi-Precision Integer 190 bits long...
sign: Negative
magnitude: DE44DE7163E46A3C E7CC425F65C3664D C90996DE7DB85A7D
This is a copy of the input file:
Senator Hand N. Till
Washington, DC
Dear Senator:
This letter is to inform you we have
opened account no. 338907021 on your
behalf, and deposted therein a
legislative incentive payment of
$1 million. For withdrawl, you will
need to use your password BJRGUD7693.
Yours very truly,
Arnold C. Creole
Vice President
Greater Caribbean Bank
The number of bytes in the plaintext input file is = 355
The new number of bytes in the plaintext input file is = 355
ciphertext.length = 360
Ciphertext = Multi-Precision Integer 2878 bits long...
sign: Negative
magnitude: Hexadecimal dump of 360 bytes...
0: C449E73FB3B02DAD 9DFB15A1433586B0 7C99A52FD1E6B094 0E0A6D435EC483C2
32: 1C28E48CD3F02CD4 630BAD642F9A0BF8 4B31EF94A8FDB43A A61EE476B5DE4743
64: 08868C8390C2BF4A F0D5D7B4CBAFF14A 884CDABE281D8F01 C8D49EAEA006520B
96: 6E924ADF4861FF36 43A34674BAA21518 C2FDAA27EB5B7D65 EEA198FFAFB17D66
128: 63F8F18AD3C75805 C8097E0D2DA90A78 4F42472C6B8E661F 946D8BD99C39DE44
160: 87B323F686C476E3 93EBC7A472387C8B 391462640F1A9227 0A6EBB3DD6E275A5
192: F77E291F18CF503F 1EED73ED165BC32A E10C0DD3CE5E0023 74B4866BC009D556
224: 29B70216AA13A5D4 8317D82E1F2594AF FE8A5DCB1A89B869 868BC01AC39DA234
256: 76C95CCC04CFC679 92191161D2647A26 312F96B9C7751136 BE582036673965CA
288: 410C9CD6AB396259 F24B50E8E981F179 82681AE7337CE551 91A4267E9872A13D
320: 65A158F4BC96D9EF EA8F8FAEBF4A1307 E90F7DF3CCFBBA98 4CE576A91008FB6A
352: 1DCD18C57E09E69C
Plaintext (decrypted from memory) = Multi-Precision Integer 2839 bits long...
sign: Positive
magnitude: Hexadecimal dump of 355 bytes...
0: 53656E61746F7220 48616E64204E2E20 54696C6C0D0A5761 7368696E67746F6E
32: 2C2044430D0A0D0A 446561722053656E 61746F723A0D0A0D 0A54686973206C65
64: 7474657220697320 746F20696E666F72 6D20796F75207765 20686176650D0A6F
96: 70656E6564206163 636F756E74206E6F 2E20333338393037 303231206F6E2079
128: 6F75720D0A626568 616C662C20616E64 206465706F737465 6420746865726569
160: 6E20610D0A6C6567 69736C6174697665 20696E63656E7469 7665207061796D65
192: 6E74206F660D0A24 31206D696C6C696F 6E2E2020466F7220 7769746864726177
224: 6C2C20796F752077 696C6C0D0A6E6565 6420746F20757365 20796F7572207061
256: 7373776F72642042 4A52475544373639 332E0D0A0D0A596F 7572732076657279
288: 207472756C792C0D 0A0D0A41726E6F6C 6420432E20437265 6F6C650D0A566963
320: 6520507265736964 656E740D0A477265 6174657220436172 69626265616E2042
352: 616E6B
Following is a copy of the decrypted (from memory) bytes:
Senator Hand N. Till
Washington, DC
Dear Senator:
This letter is to inform you we have
opened account no. 338907021 on your
behalf, and deposted therein a
legislative incentive payment of
$1 million. For withdrawl, you will
need to use your password BJRGUD7693.
Yours very truly,
Arnold C. Creole
Vice President
Greater Caribbean Bank
The number of bytes in the ciphertext input file is 360
Plaintext (decrypted from cipher file) = Multi-Precision Integer 2839 bits long...
sign: Positive
magnitude: Hexadecimal dump of 355 bytes...
0: 53656E61746F7220 48616E64204E2E20 54696C6C0D0A5761 7368696E67746F6E
32: 2C2044430D0A0D0A 446561722053656E 61746F723A0D0A0D 0A54686973206C65
64: 7474657220697320 746F20696E666F72 6D20796F75207765 20686176650D0A6F
96: 70656E6564206163 636F756E74206E6F 2E20333338393037 303231206F6E2079
128: 6F75720D0A626568 616C662C20616E64 206465706F737465 6420746865726569
160: 6E20610D0A6C6567 69736C6174697665 20696E63656E7469 7665207061796D65
192: 6E74206F660D0A24 31206D696C6C696F 6E2E2020466F7220 7769746864726177
224: 6C2C20796F752077 696C6C0D0A6E6565 6420746F20757365 20796F7572207061
256: 7373776F72642042 4A52475544373639 332E0D0A0D0A596F 7572732076657279
288: 207472756C792C0D 0A0D0A41726E6F6C 6420432E20437265 6F6C650D0A566963
320: 6520507265736964 656E740D0A477265 6174657220436172 69626265616E2042
352: 616E6B
Following is a copy of the decrypted (from cipher file) bytes:
Senator Hand N. Till
Washington, DC
Dear Senator:
This letter is to inform you we have
opened account no. 338907021 on your
behalf, and deposted therein a
legislative incentive payment of
$1 million. For withdrawl, you will
need to use your password BJRGUD7693.
Yours very truly,
Arnold C. Creole
Vice President
Greater Caribbean Bank
J. Orlin Grabbe is the author of International Financial Markets, and is an internationally recognized derivatives expert who has recently branched out into cryptology, banking security, and digital cash. His home page is located at http://www.aci.net/kalliste/homepage.html. He currently resides in Costa Rica.