Blowfish Secret Key Encryption Tests

Cryptography Tutorials - Herong's Tutorial Examples

∟Cipher - Secret Key Encryption and Decryption

∟Blowfish Secret Key Encryption Tests

This section provides the test result of Blowfish secret key encryption and decryption using the javax.crypto.Cipher class.

Here is the result of my first test of JceSecretCipher.java with the Blowfish algorithm. The Blowfish key can be generated from JceSecretKeyTest.java.

Here is the encryption step:

herong> java JceSecretKeyTest 56 bfish Blowfish

herong> javac JceSecretCipher.java

herong> java JceSecretCipher Blowfish encrypt bfish.key \
   JceSecretCipher.java jce.cph

KeySpec Object Info:
Saved File = bfish.key
Length = 7
toString = javax.crypto.spec.SecretKeySpec@2685016e

SecretKey Object Info:
Algorithm = Blowfish
toString = javax.crypto.spec.SecretKeySpec@2685016e

Cipher Object Info:
Block Size = 8
Algorithm = Blowfish
Provider = SunJCE version 1.6
toString = javax.crypto.Cipher@b179c3

Cipher Process Info:
Input Size = 3684
Output Size = 3688

Here is the decryption step:

herong> java JceSecretCipher Blowfish decrypt bfish.key jce.cph jce.clr

KeySpec Object Info:
Saved File = bfish.key
Length = 7
toString = javax.crypto.spec.SecretKeySpec@2685016e

SecretKey Object Info:
Algorithm = Blowfish
toString = javax.crypto.spec.SecretKeySpec@2685016e

Cipher Object Info:
Block Size = 8
Algorithm = Blowfish
Provider = SunJCE version 1.6
toString = javax.crypto.Cipher@b179c3

Cipher Process Info:
Input Size = 3688
Output Size = 3684

Now checking the decryption output with the original text:

herong> comp JceSecretCipher.java jce.clr

Comparing JceSecretCipher.java and jce.clr...
Files compare OK

Note that:

bfish.key is the key file generated by KeyGenerator with the Blowfish algorithm.
The last command confirms that the encryption process and the decryption process work correctly.
The block size of Blowfish encryption algorithm is 8 bytes.