AES Encryption to Match PHP's Mcrypt Extension

Demonstrates how to match AES encryption results with PHP's mcrypt extension.

Please refer to this discussion about PHP AES Encryption. The code here matches the PHP mcrypt results on that page.

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Dim crypt As New Chilkat.Crypt2()

Dim success As Boolean
success = crypt.UnlockComponent("Anything for 30-day trial")
If (success <> true) Then
    MsgBox("Crypt component unlock failed")
    Exit Sub
End If


'  AES is also known as Rijndael.
crypt.CryptAlgorithm = "aes"

'  CipherMode may be "ecb" or "cbc"
crypt.CipherMode = "cbc"

'  KeyLength may be 128, 192, 256
crypt.KeyLength = 256

'  Pad with NULL bytes (PHP pads with NULL bytes)
crypt.PaddingScheme = 3

'  EncodingMode specifies the encoding of the output for
'  encryption, and the input for decryption.
'  It may be "hex", "url", "base64", or "quoted-printable".
crypt.EncodingMode = "hex"

Dim ivAscii As String
ivAscii = "1234567890123456"
crypt.SetEncodedIV(ivAscii,"ascii")

'  The secret key must equal the size of the key.  For
'  256-bit encryption, the binary secret key is 32 bytes.
'  For 128-bit encryption, the binary secret key is 16 bytes.
Dim keyAscii As String
keyAscii = "12345678901234561234567890123456"
crypt.SetEncodedKey(keyAscii,"ascii")

Dim plainText As String
plainText = "The quick brown fox jumped over the lazy dog"

Dim cipherText As String
cipherText = crypt.EncryptStringENC(plainText)
MsgBox(cipherText)


'  Do 128-bit AES encryption:
crypt.KeyLength = 128
keyAscii = "1234567890123456"
crypt.SetEncodedKey(keyAscii,"ascii")


cipherText = crypt.EncryptStringENC(plainText)
MsgBox(cipherText)

'  -------
'  Results
'  -------
'  You may use these as test vectors for testing your AES implementations...
' 
'  ------------------------
'  256-bit key, CBC mode
'  ------------------------
'  IV = '1234567890123456' 
'   (hex: 31323334353637383930313233343536)
'  Key = '12345678901234561234567890123456' 
'   (hex: 3132333435363738393031323334353631323334353637383930313233343536)
'  PlainText:
'   'The quick brown fox jumped over the lazy dog'
	// CipherText(hex):
'   2fddc3abec692e1572d9b7d629172a05caf230bc7c8fd2d26ccfd65f9c54526984f7cb1c4326ef058cd7bee3967299e3

' 
'  ------------------------
'  128-bit key, CBC mode
'  ------------------------
'  IV = '1234567890123456' 
'   (hex: 31323334353637383930313233343536)
'  Key = '1234567890123456' 
'   (hex: 31323334353637383930313233343536)
'  PlainText:
'   'The quick brown fox jumped over the lazy dog'
	// CipherText(hex):
'   f78176ae8dfe84578529208d30f446bbb29a64dc388b5c0b63140a4f316b3f341fe7d3b1a3cc5113c81ef8dd714a1c99