Match Java JCE AES Encryption Results (ECB mode)

Shows sample code in Python that matches Java JCE encryption results for 128-bit AES encryption using ECB mode.

Download Chilkat Python Library

import sys
import chilkat

crypt = chilkat.CkCrypt2()

# Any string argument automatically begins the 30-day trial.
success = crypt.UnlockComponent("30-day trial")
if (success != True):
    print "Crypt component unlock failed"
    sys.exit()

password = "secretPassphrase"

# Use the Digest MD5 algorithm to get a 16-byte binary secret key.
crypt.put_HashAlgorithm("md5")
crypt.put_EncodingMode("hex")
secretKeyHex = crypt.hashStringENC(password)

crypt.put_CryptAlgorithm("aes")
crypt.put_CipherMode("ecb")
crypt.put_KeyLength(128)
crypt.SetEncodedKey(secretKeyHex,"hex")

text = "The quick brown fox jumped over the lazy dog."
encText = crypt.encryptStringENC(text)

# Displays:
# C960892077D566258D38DF4BBAE8548E6827BF8C27A9D2EE
# 6F563FC75003F8F6A05B54CFD28CDC8833BD073F7FC6D031
print encText

# This Java (JCE) code produces the same results:
# String password = "secretPassphrase";
# 
# MessageDigest md = MessageDigest.getInstance("MD5");
# md.update(password.getBytes("UTF-8"), 0, password.length());
# byte[] rawKey = md.digest();
# 
# String text = "The quick brown fox jumped over the lazy dog.";
# 
# SecretKeySpec skeySpec = new SecretKeySpec(rawKey, "AES");
# Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
# cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
# 
# byte[] encrypted = cipher.doFinal(text.getBytes("UTF-8"));
# 
# System.out.println(toHex(encrypted));

# This is the toHex method in Java:
# public static String toHex (byte buf[]) {
# 
# StringBuffer strbuf = new StringBuffer(buf.length * 2);
# int i;
# 
# for (i = 0; i < buf.length; i++) {
# if (((int) buf[i] & 0xff) < 0x10)
# strbuf.append("0");
# 
# strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
# }
# 
# return strbuf.toString();
# }