📄 clstwofish.cls
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P(0, 110) = &H62
P(0, 111) = &H71
P(0, 112) = &H81
P(0, 113) = &H79
P(0, 114) = &H9
P(0, 115) = &HAD
P(0, 116) = &H24
P(0, 117) = &HCD
P(0, 118) = &HF9
P(0, 119) = &HD8
P(0, 120) = &HE5
P(0, 121) = &HC5
P(0, 122) = &HB9
P(0, 123) = &H4D
P(0, 124) = &H44
P(0, 125) = &H8
P(0, 126) = &H86
P(0, 127) = &HE7
P(0, 128) = &HA1
P(0, 129) = &H1D
P(0, 130) = &HAA
P(0, 131) = &HED
P(0, 132) = &H6
P(0, 133) = &H70
P(0, 134) = &HB2
P(0, 135) = &HD2
P(0, 136) = &H41
P(0, 137) = &H7B
P(0, 138) = &HA0
P(0, 139) = &H11
P(0, 140) = &H31
P(0, 141) = &HC2
P(0, 142) = &H27
P(0, 143) = &H90
P(0, 144) = &H20
P(0, 145) = &HF6
P(0, 146) = &H60
P(0, 147) = &HFF
P(0, 148) = &H96
P(0, 149) = &H5C
P(0, 150) = &HB1
P(0, 151) = &HAB
P(0, 152) = &H9E
P(0, 153) = &H9C
P(0, 154) = &H52
P(0, 155) = &H1B
P(0, 156) = &H5F
P(0, 157) = &H93
P(0, 158) = &HA
P(0, 159) = &HEF
P(0, 160) = &H91
P(0, 161) = &H85
P(0, 162) = &H49
P(0, 163) = &HEE
P(0, 164) = &H2D
P(0, 165) = &H4F
P(0, 166) = &H8F
P(0, 167) = &H3B
P(0, 168) = &H47
P(0, 169) = &H87
P(0, 170) = &H6D
P(0, 171) = &H46
P(0, 172) = &HD6
P(0, 173) = &H3E
P(0, 174) = &H69
P(0, 175) = &H64
P(0, 176) = &H2A
P(0, 177) = &HCE
P(0, 178) = &HCB
P(0, 179) = &H2F
P(0, 180) = &HFC
P(0, 181) = &H97
P(0, 182) = &H5
P(0, 183) = &H7A
P(0, 184) = &HAC
P(0, 185) = &H7F
P(0, 186) = &HD5
P(0, 187) = &H1A
P(0, 188) = &H4B
P(0, 189) = &HE
P(0, 190) = &HA7
P(0, 191) = &H5A
P(0, 192) = &H28
P(0, 193) = &H14
P(0, 194) = &H3F
P(0, 195) = &H29
P(0, 196) = &H88
P(0, 197) = &H3C
P(0, 198) = &H4C
P(0, 199) = &H2
P(0, 200) = &HB8
P(0, 201) = &HDA
P(0, 202) = &HB0
P(0, 203) = &H17
P(0, 204) = &H55
P(0, 205) = &H1F
P(0, 206) = &H8A
P(0, 207) = &H7D
P(0, 208) = &H57
P(0, 209) = &HC7
P(0, 210) = &H8D
P(0, 211) = &H74
P(0, 212) = &HB7
P(0, 213) = &HC4
P(0, 214) = &H9F
P(0, 215) = &H72
P(0, 216) = &H7E
P(0, 217) = &H15
P(0, 218) = &H22
P(0, 219) = &H12
P(0, 220) = &H58
P(0, 221) = &H7
P(0, 222) = &H99
P(0, 223) = &H34
P(0, 224) = &H6E
P(0, 225) = &H50
P(0, 226) = &HDE
P(0, 227) = &H68
P(0, 228) = &H65
P(0, 229) = &HBC
P(0, 230) = &HDB
P(0, 231) = &HF8
P(0, 232) = &HC8
P(0, 233) = &HA8
P(0, 234) = &H2B
P(0, 235) = &H40
P(0, 236) = &HDC
P(0, 237) = &HFE
P(0, 238) = &H32
P(0, 239) = &HA4
P(0, 240) = &HCA
P(0, 241) = &H10
P(0, 242) = &H21
P(0, 243) = &HF0
P(0, 244) = &HD3
P(0, 245) = &H5D
P(0, 246) = &HF
P(0, 247) = &H0
P(0, 248) = &H6F
P(0, 249) = &H9D
P(0, 250) = &H36
P(0, 251) = &H42
P(0, 252) = &H4A
P(0, 253) = &H5E
P(0, 254) = &HC1
P(0, 255) = &HE0
'Initialize P(1,..) array
P(1, 0) = &H75
P(1, 1) = &HF3
P(1, 2) = &HC6
P(1, 3) = &HF4
P(1, 4) = &HDB
P(1, 5) = &H7B
P(1, 6) = &HFB
P(1, 7) = &HC8
P(1, 8) = &H4A
P(1, 9) = &HD3
P(1, 10) = &HE6
P(1, 11) = &H6B
P(1, 12) = &H45
P(1, 13) = &H7D
P(1, 14) = &HE8
P(1, 15) = &H4B
P(1, 16) = &HD6
P(1, 17) = &H32
P(1, 18) = &HD8
P(1, 19) = &HFD
P(1, 20) = &H37
P(1, 21) = &H71
P(1, 22) = &HF1
P(1, 23) = &HE1
P(1, 24) = &H30
P(1, 25) = &HF
P(1, 26) = &HF8
P(1, 27) = &H1B
P(1, 28) = &H87
P(1, 29) = &HFA
P(1, 30) = &H6
P(1, 31) = &H3F
P(1, 32) = &H5E
P(1, 33) = &HBA
P(1, 34) = &HAE
P(1, 35) = &H5B
P(1, 36) = &H8A
P(1, 37) = &H0
P(1, 38) = &HBC
P(1, 39) = &H9D
P(1, 40) = &H6D
P(1, 41) = &HC1
P(1, 42) = &HB1
P(1, 43) = &HE
P(1, 44) = &H80
P(1, 45) = &H5D
P(1, 46) = &HD2
P(1, 47) = &HD5
P(1, 48) = &HA0
P(1, 49) = &H84
P(1, 50) = &H7
P(1, 51) = &H14
P(1, 52) = &HB5
P(1, 53) = &H90
P(1, 54) = &H2C
P(1, 55) = &HA3
P(1, 56) = &HB2
P(1, 57) = &H73
P(1, 58) = &H4C
P(1, 59) = &H54
P(1, 60) = &H92
P(1, 61) = &H74
P(1, 62) = &H36
P(1, 63) = &H51
P(1, 64) = &H38
P(1, 65) = &HB0
P(1, 66) = &HBD
P(1, 67) = &H5A
P(1, 68) = &HFC
P(1, 69) = &H60
P(1, 70) = &H62
P(1, 71) = &H96
P(1, 72) = &H6C
P(1, 73) = &H42
P(1, 74) = &HF7
P(1, 75) = &H10
P(1, 76) = &H7C
P(1, 77) = &H28
P(1, 78) = &H27
P(1, 79) = &H8C
P(1, 80) = &H13
P(1, 81) = &H95
P(1, 82) = &H9C
P(1, 83) = &HC7
P(1, 84) = &H24
P(1, 85) = &H46
P(1, 86) = &H3B
P(1, 87) = &H70
P(1, 88) = &HCA
P(1, 89) = &HE3
P(1, 90) = &H85
P(1, 91) = &HCB
P(1, 92) = &H11
P(1, 93) = &HD0
P(1, 94) = &H93
P(1, 95) = &HB8
P(1, 96) = &HA6
P(1, 97) = &H83
P(1, 98) = &H20
P(1, 99) = &HFF
P(1, 100) = &H9F
P(1, 101) = &H77
P(1, 102) = &HC3
P(1, 103) = &HCC
P(1, 104) = &H3
P(1, 105) = &H6F
P(1, 106) = &H8
P(1, 107) = &HBF
P(1, 108) = &H40
P(1, 109) = &HE7
P(1, 110) = &H2B
P(1, 111) = &HE2
P(1, 112) = &H79
P(1, 113) = &HC
P(1, 114) = &HAA
P(1, 115) = &H82
P(1, 116) = &H41
P(1, 117) = &H3A
P(1, 118) = &HEA
P(1, 119) = &HB9
P(1, 120) = &HE4
P(1, 121) = &H9A
P(1, 122) = &HA4
P(1, 123) = &H97
P(1, 124) = &H7E
P(1, 125) = &HDA
P(1, 126) = &H7A
P(1, 127) = &H17
P(1, 128) = &H66
P(1, 129) = &H94
P(1, 130) = &HA1
P(1, 131) = &H1D
P(1, 132) = &H3D
P(1, 133) = &HF0
P(1, 134) = &HDE
P(1, 135) = &HB3
P(1, 136) = &HB
P(1, 137) = &H72
P(1, 138) = &HA7
P(1, 139) = &H1C
P(1, 140) = &HEF
P(1, 141) = &HD1
P(1, 142) = &H53
P(1, 143) = &H3E
P(1, 144) = &H8F
P(1, 145) = &H33
P(1, 146) = &H26
P(1, 147) = &H5F
P(1, 148) = &HEC
P(1, 149) = &H76
P(1, 150) = &H2A
P(1, 151) = &H49
P(1, 152) = &H81
P(1, 153) = &H88
P(1, 154) = &HEE
P(1, 155) = &H21
P(1, 156) = &HC4
P(1, 157) = &H1A
P(1, 158) = &HEB
P(1, 159) = &HD9
P(1, 160) = &HC5
P(1, 161) = &H39
P(1, 162) = &H99
P(1, 163) = &HCD
P(1, 164) = &HAD
P(1, 165) = &H31
P(1, 166) = &H8B
P(1, 167) = &H1
P(1, 168) = &H18
P(1, 169) = &H23
P(1, 170) = &HDD
P(1, 171) = &H1F
P(1, 172) = &H4E
P(1, 173) = &H2D
P(1, 174) = &HF9
P(1, 175) = &H48
P(1, 176) = &H4F
P(1, 177) = &HF2
P(1, 178) = &H65
P(1, 179) = &H8E
P(1, 180) = &H78
P(1, 181) = &H5C
P(1, 182) = &H58
P(1, 183) = &H19
P(1, 184) = &H8D
P(1, 185) = &HE5
P(1, 186) = &H98
P(1, 187) = &H57
P(1, 188) = &H67
P(1, 189) = &H7F
P(1, 190) = &H5
P(1, 191) = &H64
P(1, 192) = &HAF
P(1, 193) = &H63
P(1, 194) = &HB6
P(1, 195) = &HFE
P(1, 196) = &HF5
P(1, 197) = &HB7
P(1, 198) = &H3C
P(1, 199) = &HA5
P(1, 200) = &HCE
P(1, 201) = &HE9
P(1, 202) = &H68
P(1, 203) = &H44
P(1, 204) = &HE0
P(1, 205) = &H4D
P(1, 206) = &H43
P(1, 207) = &H69
P(1, 208) = &H29
P(1, 209) = &H2E
P(1, 210) = &HAC
P(1, 211) = &H15
P(1, 212) = &H59
P(1, 213) = &HA8
P(1, 214) = &HA
P(1, 215) = &H9E
P(1, 216) = &H6E
P(1, 217) = &H47
P(1, 218) = &HDF
P(1, 219) = &H34
P(1, 220) = &H35
P(1, 221) = &H6A
P(1, 222) = &HCF
P(1, 223) = &HDC
P(1, 224) = &H22
P(1, 225) = &HC9
P(1, 226) = &HC0
P(1, 227) = &H9B
P(1, 228) = &H89
P(1, 229) = &HD4
P(1, 230) = &HED
P(1, 231) = &HAB
P(1, 232) = &H12
P(1, 233) = &HA2
P(1, 234) = &HD
P(1, 235) = &H52
P(1, 236) = &HBB
P(1, 237) = &H2
P(1, 238) = &H2F
P(1, 239) = &HA9
P(1, 240) = &HD7
P(1, 241) = &H61
P(1, 242) = &H1E
P(1, 243) = &HB4
P(1, 244) = &H50
P(1, 245) = &H4
P(1, 246) = &HF6
P(1, 247) = &HC2
P(1, 248) = &H16
P(1, 249) = &H25
P(1, 250) = &H86
P(1, 251) = &H56
P(1, 252) = &H55
P(1, 253) = &H9
P(1, 254) = &HBE
P(1, 255) = &H91
'Initialize the MDS array
For i = 0 To 255
j = P(0, i)
m1(0) = j
mX(0) = j Xor LFSR2(j)
mY(0) = j Xor LFSR1(j) Xor LFSR2(j)
j = P(1, i)
m1(1) = j
mX(1) = j Xor LFSR2(j)
mY(1) = j Xor LFSR1(j) Xor LFSR2(j)
MDS(0, i) = (m1(1) Or lBSL(mX(1), 8) Or lBSL(mY(1), 16) Or lBSL(mY(1), 24))
MDS(1, i) = (mY(0) Or lBSL(mY(0), 8) Or lBSL(mX(0), 16) Or lBSL(m1(0), 24))
MDS(2, i) = (mX(1) Or lBSL(mY(1), 8) Or lBSL(m1(1), 16) Or lBSL(mY(1), 24))
MDS(3, i) = (mX(0) Or lBSL(m1(0), 8) Or lBSL(mY(0), 16) Or lBSL(mX(0), 24))
Next
End Sub
Public Property Let Key(Optional ByVal MinKeyLength As TWOFISHKEYLENGTH, New_Value As String)
Dim KeyLength As Long
Dim Key() As Byte
'Convert the key into a bytearray
KeyLength = Len(New_Value) * 8
Key() = StrConv(New_Value, vbFromUnicode)
'Resize the key array if it is too small
If (KeyLength < MinKeyLength) Then
ReDim Preserve Key(MinKeyLength \ 8 - 1)
KeyLength = MinKeyLength
End If
'The key array can only be of certain sizes,
'if the size is invalid resize to the closes
'size (preferably by making it larger)
If (KeyLength > 256) Then
ReDim Preserve Key(31)
KeyLength = 256
ElseIf (KeyLength > 192) And (KeyLength < 256) Then
ReDim Preserve Key(23)
KeyLength = 192
ElseIf (KeyLength > 128) And (KeyLength < 192) Then
ReDim Preserve Key(15)
KeyLength = 128
ElseIf (KeyLength > 64) And (KeyLength < 128) Then
ReDim Preserve Key(7)
KeyLength = 64
End If
'Create the key-dependant sboxes
Call KeyCreate(Key, KeyLength \ 8)
End Property
Public Sub EncryptByte(ByteArray() As Byte, Optional Key As String)
Dim Offset As Long
Dim OrigLen As Long
Dim CipherLen As Long
Dim CurrPercent As Long
Dim NextPercent As Long
Dim DWord(0 To 5) As Long
Dim CipherWord(0 To 3) As Long
'Set the new key if any was provided
If (Len(Key) > 0) Then Me.Key = Key
'Get the length of the plaintext
OrigLen = UBound(ByteArray) + 1
'First we add 12 bytes (4 bytes for the
'length and 8 bytes for the seed values
'for the CBC routine), and the ciphertext
'must be a multiple of 16 bytes
CipherLen = OrigLen + 12
If (CipherLen Mod 16 <> 0) Then
CipherLen = CipherLen + 16 - (CipherLen Mod 16)
End If
ReDim Preserve ByteArray(CipherLen - 1)
Call CopyMem(ByteArray(12), ByteArray(0), OrigLen)
'Store the length descriptor in bytes [9-12]
Call CopyMem(ByteArray(8), OrigLen, 4)
'Store a block of random data in bytes [1-8],
'these work as seed values for the CBC routine
'and is used to produce different ciphertext
'even when encrypting the same data with the
'same key)
Call Randomize
Call CopyMem(ByteArray(0), CLng(2147483647 * Rnd), 4)
Call CopyMem(ByteArray(4), CLng(2147483647 * Rnd), 4)
'Encrypt the data in 128-bits blocks
For Offset = 0 To (CipherLen - 1) Step 16
'Get the next block
Call CopyMem(DWord(0), ByteArray(Offset), 16)
'XOR the plaintext with the previous
'ciphertext (CBC, Cipher-Block Chaining)
DWord(0) = DWord(0) Xor CipherWord(0)
DWord(1) = DWord(1) Xor CipherWord(1)
DWord(2) = DWord(2) Xor CipherWord(2)
DWord(3) = DWord(3) Xor CipherWord(3)
'Encrypt the block
Call EncryptBlock(DWord())
'Store the new block
Call CopyMem(ByteArray(Offset), DWord(0), 16)
'Store the cipherblock (for CBC)
Call CopyMem(CipherWord(0), DWord(0), 16)
'Update the progress if neccessary
If (Offset >= NextPercent) Then
CurrPercent = Int((Offset / CipherLen) * 100)
NextPercent = (CipherLen * ((CurrPercent + 1) / 100)) + 1
RaiseEvent Progress(CurrPercent)
End If
Next
'Make sure we return a 100% progress
If (CurrPercent <> 100) Then RaiseEvent Progress(100)
End Sub
Public Sub DecryptByte(ByteArray() As Byte, Optional Key As String)
Dim Offset As Long
Dim OrigLen As Long
Dim CipherLen As Long
Dim CurrPercent As Long
Dim NextPercent As Long
Dim DWord(0 To 5) As Long
Dim CipherWord(0 To 3) As Long
'Set the new key if any was provided
If (Len(Key) > 0) Then Me.Key = Key
'Get the length of the ciphertext
CipherLen = UBound(ByteArray) + 1
'Decrypt the data in 128-bits blocks
For Offset = 0 To (CipherLen - 1) Step 16
'Get the next block
Call CopyMem(DWord(2), ByteArray(Offset), 16)
'Decrypt the block
Call DecryptBlock(DWord())
'XOR with the previous cipherblock
DWord(0) = DWord(0) Xor CipherWord(0)
DWord(1) = DWord(1) Xor CipherWord(1)
DWord(2) = DWord(2) Xor CipherWord(2)
DWord(3) = DWord(3) Xor CipherWord(3)
'Store the current ciphertext to use
'XOR with the next block plaintext
Call CopyMem(CipherWord(0), ByteArray(Offset), 16)
'Store the block
Call CopyMem(ByteArray(Offset), DWord(0), 16)
'Update the progress if neccessary
If (Offset >= NextPercent) Then
CurrPercent = Int((Offset / CipherLen) * 100)
NextPercent = (CipherLen * ((CurrPercent + 1) / 100)) + 1
RaiseEvent Progress(CurrPercent)
End If
Next
'Get the size of the original array
Call CopyMem(OrigLen, ByteArray(8), 4)
'Make sure OrigLen is a reasonable value,
'if we used the wrong key the next couple
'of statements could be dangerous (GPF)
If (CipherLen - OrigLen > 27) Or (CipherLen - OrigLen < 12) Then
Call Err.Raise(vbObjectError, , "Incorrect size descriptor in Twofish decryption")
End If
'Resize the bytearray to hold only the plaintext
'and not the extra information added by the
'encryption routine
Call CopyMem(ByteArray(0), ByteArray(12), OrigLen)
ReDim Preserve ByteArray(OrigLen - 1)
'Make sure we return a 100% progress
If (CurrPercent <> 100) Then RaiseEvent Progress(100)
End Sub
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