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_CBC {
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);
// create an Initialization Vector
byte[] iv = new byte[8];
random.nextBytes(iv);
Bkey = new BigInteger(iv);
w = cryptix.util.core.BI.dumpString(Bkey);
output1.println("The Initialization Vector = " + w);
// define the encryption mode and initialize it
Cipher des=Cipher.getInstance("DES-EDE3/CBC/PKCS#5","Cryptix");
des.initEncrypt(key);
// read in the input file preceded by the Initialization Vector
FileInputStream fis = new FileInputStream(args[0]);
byte b;
int bi;
char bc;
byte bb[] = new byte[1024];
int i;
for(i=0;i<8;i++) {bb[i]=iv[i];
bc = (char) iv[i];}
int count=8;
output1.println(" ");
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 (plus IV) is = " + count);
fis.close();
// do the encryption
int pcount = count;
byte[] bt = new byte[pcount];
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 (minus initialization vector) to general outputfile
char c;
output1.println("Following is a copy of the decrypted (from memory) bytes: ");
output1.print("\n");
for(i=8;i<decrypted.length;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=8;i<decrypted.length;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 189 bits long...
sign: Positive
magnitude: 147D21953A21ED5A 3F1D0C6C4EC6F596 FA35DE14C6CFF3E1
The Initialization Vector = Multi-Precision Integer 63 bits long...
sign: Positive
magnitude: 42B13548A4EA8D1C
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 (plus IV) is = 363
ciphertext.length = 368
Ciphertext = Multi-Precision Integer 2941 bits long...
sign: Positive
magnitude: Hexadecimal dump of 368 bytes...
0: 148F9BD92BBB6759 7CAD333C206CC4E3 9D88BB8E790098F4 B86A9CD4AF43E9C6
32: 837930F91238072D C1D46F40A3083170 7ECA606B777EC2B5 1C402091A90C746B
64: EC2FD222E200C835 E5FF147B9022163B 6CCF34C2371030B3 EF323CD4EB791ACB
96: F318537EE8ED7A72 A2436F34866CC0ED 0827B7D13C01148A 5C2ED413992FF7DE
128: AAF2CC490B015645 4DD96B4B6C478292 2642A27F70AB5B1E 48513B52DABAD49E
160: 8E21301431CA33B6 87DA5E65E63F7A48 F9F3E0C5DB190A21 738C675E4C771468
192: 163079E4EC00ABFE 86110118B0A5105E 7C1E075D86D9535C F133AD31404C0D35
224: 1842CE70482A520D 5EE16E77070B3C65 3AEBC271D97F2C7D 8BDF7131FECE2108
256: A4A4D8BAD5EED12E 097165FE0BF4A543 2354EFF05AECE2E5 22ADEB32CFACB092
288: 1878DCBCDEEE4CA0 DAD00F1336A34504 6D2B4C352F08BD18 8059E91E5DABDE99
320: 3D45F66FD6322406 0C2F33BF3F4CD9D1 6E2EFDCF73E925FC FC9488BF0D150365
352: 3A025106D30E0E38 E275F3FBB1D56D17
Plaintext (decrypted from memory) = Multi-Precision Integer 2903 bits long...
sign: Negative
magnitude: Hexadecimal dump of 363 bytes...
0: A0C4C6B3153FE00B 53656E61746F7220 48616E64204E2E20 54696C6C0D0A5761
32: 7368696E67746F6E 2C2044430D0A0D0A 446561722053656E 61746F723A0D0A0D
64: 0A54686973206C65 7474657220697320 746F20696E666F72 6D20796F75207765
96: 20686176650D0A6F 70656E6564206163 636F756E74206E6F 2E20333338393037
128: 303231206F6E2079 6F75720D0A626568 616C662C20616E64 206465706F737465
160: 6420746865726569 6E20610D0A6C6567 69736C6174697665 20696E63656E7469
192: 7665207061796D65 6E74206F660D0A24 31206D696C6C696F 6E2E2020466F7220
224: 7769746864726177 6C2C20796F752077 696C6C0D0A6E6565 6420746F20757365
256: 20796F7572207061 7373776F72642042 4A52475544373639 332E0D0A0D0A596F
288: 7572732076657279 207472756C792C0D 0A0D0A41726E6F6C 6420432E20437265
320: 6F6C650D0A566963 6520507265736964 656E740D0A477265 6174657220436172
352: 69626265616E2042 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 368
Plaintext (decrypted from cipher file) = Multi-Precision Integer 2903 bits long...
sign: Negative
magnitude: Hexadecimal dump of 363 bytes...
0: A0C4C6B3153FE00B 53656E61746F7220 48616E64204E2E20 54696C6C0D0A5761
32: 7368696E67746F6E 2C2044430D0A0D0A 446561722053656E 61746F723A0D0A0D
64: 0A54686973206C65 7474657220697320 746F20696E666F72 6D20796F75207765
96: 20686176650D0A6F 70656E6564206163 636F756E74206E6F 2E20333338393037
128: 303231206F6E2079 6F75720D0A626568 616C662C20616E64 206465706F737465
160: 6420746865726569 6E20610D0A6C6567 69736C6174697665 20696E63656E7469
192: 7665207061796D65 6E74206F660D0A24 31206D696C6C696F 6E2E2020466F7220
224: 7769746864726177 6C2C20796F752077 696C6C0D0A6E6565 6420746F20757365
256: 20796F7572207061 7373776F72642042 4A52475544373639 332E0D0A0D0A596F
288: 7572732076657279 207472756C792C0D 0A0D0A41726E6F6C 6420432E20437265
320: 6F6C650D0A566963 6520507265736964 656E740D0A477265 6174657220436172
352: 69626265616E2042 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.