rijndael.cls

来自「AES的加密类模块 可以把文件加密成AES密文」· CLS 代码 · 共 1,588 行 · 第 1/5 页

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    For i = 1 To Nr - 1 'Nr is number of rounds
        CopyMemory s(0), t0, 4&
        CopyMemory s(4), t1, 4&
        CopyMemory s(8), t2, 4&
        CopyMemory s(12), t3, 4&
        CopyMemory s(16), t4, 4&
        t0 = Td0(s(0)) Xor Td1(s(17)) Xor Td2(s(14)) Xor Td3(s(11)) Xor rkey(k + 0)
        t1 = Td0(s(4)) Xor Td1(s(1)) Xor Td2(s(18)) Xor Td3(s(15)) Xor rkey(k + 1)
        t2 = Td0(s(8)) Xor Td1(s(5)) Xor Td2(s(2)) Xor Td3(s(19)) Xor rkey(k + 2)
        t3 = Td0(s(12)) Xor Td1(s(9)) Xor Td2(s(6)) Xor Td3(s(3)) Xor rkey(k + 3)
        t4 = Td0(s(16)) Xor Td1(s(13)) Xor Td2(s(10)) Xor Td3(s(7)) Xor rkey(k + 4)
        k = k + 5
    Next i

    'Final round
    CopyMemory s(0), t0, 4&
    CopyMemory s(4), t1, 4&
    CopyMemory s(8), t2, 4&
    CopyMemory s(12), t3, 4&
    CopyMemory s(16), t4, 4&
    t0 = (Td4(s(0)) And &HFF&) Xor (Td4(s(17)) And &HFF00&) Xor (Td4(s(14)) And &HFF0000) Xor (Td4(s(11)) And &HFF000000) Xor rkey(k + 0)
    t1 = (Td4(s(4)) And &HFF&) Xor (Td4(s(1)) And &HFF00&) Xor (Td4(s(18)) And &HFF0000) Xor (Td4(s(15)) And &HFF000000) Xor rkey(k + 1)
    t2 = (Td4(s(8)) And &HFF&) Xor (Td4(s(5)) And &HFF00&) Xor (Td4(s(2)) And &HFF0000) Xor (Td4(s(19)) And &HFF000000) Xor rkey(k + 2)
    t3 = (Td4(s(12)) And &HFF&) Xor (Td4(s(9)) And &HFF00&) Xor (Td4(s(6)) And &HFF0000) Xor (Td4(s(3)) And &HFF000000) Xor rkey(k + 3)
    t4 = (Td4(s(16)) And &HFF&) Xor (Td4(s(13)) And &HFF00&) Xor (Td4(s(10)) And &HFF0000) Xor (Td4(s(7)) And &HFF000000) Xor rkey(k + 4)
    CopyMemory plaintext(p + 0), t0, 4&
    CopyMemory plaintext(p + 4), t1, 4&
    CopyMemory plaintext(p + 8), t2, 4&
    CopyMemory plaintext(p + 12), t3, 4&
    CopyMemory plaintext(p + 16), t4, 4&
End Sub
#End If

'Encrypt a 192 bit block.  plaintext(p ... p+23) is input, ciphertext(q ... q+23) is output.
'plaintext and ciphertext can be the same array.  Will crash if ciphertext(q ... q+23) is not allocated.
Public Sub Block192Encrypt(plaintext() As Byte, ciphertext() As Byte, p As Long, q As Long)
    Dim i     As Long
    Dim k     As Long
    Dim t0    As Long
    Dim t1    As Long
    Dim t2    As Long
    Dim t3    As Long
    Dim t4    As Long
    Dim t5    As Long
    Dim s(23) As Byte

    CopyMemory t0, plaintext(p + 0), 4&
    CopyMemory t1, plaintext(p + 4), 4&
    CopyMemory t2, plaintext(p + 8), 4&
    CopyMemory t3, plaintext(p + 12), 4&
    CopyMemory t4, plaintext(p + 16), 4&
    CopyMemory t5, plaintext(p + 20), 4&
    t0 = t0 Xor fkey(0)
    t1 = t1 Xor fkey(1)
    t2 = t2 Xor fkey(2)
    t3 = t3 Xor fkey(3)
    t4 = t4 Xor fkey(4)
    t5 = t5 Xor fkey(5)
    k = 6

    For i = 1 To Nr - 1 'Nr is number of rounds
        CopyMemory s(0), t0, 4&
        CopyMemory s(4), t1, 4&
        CopyMemory s(8), t2, 4&
        CopyMemory s(12), t3, 4&
        CopyMemory s(16), t4, 4&
        CopyMemory s(20), t5, 4&
        t0 = Te0(s(0)) Xor Te1(s(5)) Xor Te2(s(10)) Xor Te3(s(15)) Xor fkey(k + 0)
        t1 = Te0(s(4)) Xor Te1(s(9)) Xor Te2(s(14)) Xor Te3(s(19)) Xor fkey(k + 1)
        t2 = Te0(s(8)) Xor Te1(s(13)) Xor Te2(s(18)) Xor Te3(s(23)) Xor fkey(k + 2)
        t3 = Te0(s(12)) Xor Te1(s(17)) Xor Te2(s(22)) Xor Te3(s(3)) Xor fkey(k + 3)
        t4 = Te0(s(16)) Xor Te1(s(21)) Xor Te2(s(2)) Xor Te3(s(7)) Xor fkey(k + 4)
        t5 = Te0(s(20)) Xor Te1(s(1)) Xor Te2(s(6)) Xor Te3(s(11)) Xor fkey(k + 5)
        k = k + 6
    Next i

    'Final round
    CopyMemory s(0), t0, 4&
    CopyMemory s(4), t1, 4&
    CopyMemory s(8), t2, 4&
    CopyMemory s(12), t3, 4&
    CopyMemory s(16), t4, 4&
    CopyMemory s(20), t5, 4&
    t0 = (Te4(s(0)) And &HFF&) Xor (Te4(s(5)) And &HFF00&) Xor (Te4(s(10)) And &HFF0000) Xor (Te4(s(15)) And &HFF000000) Xor fkey(k + 0)
    t1 = (Te4(s(4)) And &HFF&) Xor (Te4(s(9)) And &HFF00&) Xor (Te4(s(14)) And &HFF0000) Xor (Te4(s(19)) And &HFF000000) Xor fkey(k + 1)
    t2 = (Te4(s(8)) And &HFF&) Xor (Te4(s(13)) And &HFF00&) Xor (Te4(s(18)) And &HFF0000) Xor (Te4(s(23)) And &HFF000000) Xor fkey(k + 2)
    t3 = (Te4(s(12)) And &HFF&) Xor (Te4(s(17)) And &HFF00&) Xor (Te4(s(22)) And &HFF0000) Xor (Te4(s(3)) And &HFF000000) Xor fkey(k + 3)
    t4 = (Te4(s(16)) And &HFF&) Xor (Te4(s(21)) And &HFF00&) Xor (Te4(s(2)) And &HFF0000) Xor (Te4(s(7)) And &HFF000000) Xor fkey(k + 4)
    t5 = (Te4(s(20)) And &HFF&) Xor (Te4(s(1)) And &HFF00&) Xor (Te4(s(6)) And &HFF0000) Xor (Te4(s(11)) And &HFF000000) Xor fkey(k + 5)

    CopyMemory ciphertext(q + 0), t0, 4&
    CopyMemory ciphertext(q + 4), t1, 4&
    CopyMemory ciphertext(q + 8), t2, 4&
    CopyMemory ciphertext(q + 12), t3, 4&
    CopyMemory ciphertext(q + 16), t4, 4&
    CopyMemory ciphertext(q + 20), t5, 4&
End Sub

'Decrypt a 192 bit block.  ciphertext(q ... q+23) is input, plaintext(p ... p+23) is output.
'plaintext and ciphertext can be the same array.  Will crash if plaintext(p ... p+23) is not allocated.
Public Sub Block192Decrypt(plaintext() As Byte, ciphertext() As Byte, p As Long, q As Long)
    Dim i     As Long
    Dim k     As Long
    Dim t0    As Long
    Dim t1    As Long
    Dim t2    As Long
    Dim t3    As Long
    Dim t4    As Long
    Dim t5    As Long
    Dim s(23) As Byte

    CopyMemory t0, ciphertext(q + 0), 4&
    CopyMemory t1, ciphertext(q + 4), 4&
    CopyMemory t2, ciphertext(q + 8), 4&
    CopyMemory t3, ciphertext(q + 12), 4&
    CopyMemory t4, ciphertext(q + 16), 4&
    CopyMemory t5, ciphertext(q + 20), 4&
    t0 = t0 Xor rkey(0)
    t1 = t1 Xor rkey(1)
    t2 = t2 Xor rkey(2)
    t3 = t3 Xor rkey(3)
    t4 = t4 Xor rkey(4)
    t5 = t5 Xor rkey(5)
    k = 6

    For i = 1 To Nr - 1 'Nr is number of rounds
        CopyMemory s(0), t0, 4&
        CopyMemory s(4), t1, 4&
        CopyMemory s(8), t2, 4&
        CopyMemory s(12), t3, 4&
        CopyMemory s(16), t4, 4&
        CopyMemory s(20), t5, 4&
        t0 = Td0(s(0)) Xor Td1(s(21)) Xor Td2(s(18)) Xor Td3(s(15)) Xor rkey(k + 0)
        t1 = Td0(s(4)) Xor Td1(s(1)) Xor Td2(s(22)) Xor Td3(s(19)) Xor rkey(k + 1)
        t2 = Td0(s(8)) Xor Td1(s(5)) Xor Td2(s(2)) Xor Td3(s(23)) Xor rkey(k + 2)
        t3 = Td0(s(12)) Xor Td1(s(9)) Xor Td2(s(6)) Xor Td3(s(3)) Xor rkey(k + 3)
        t4 = Td0(s(16)) Xor Td1(s(13)) Xor Td2(s(10)) Xor Td3(s(7)) Xor rkey(k + 4)
        t5 = Td0(s(20)) Xor Td1(s(17)) Xor Td2(s(14)) Xor Td3(s(11)) Xor rkey(k + 5)
        k = k + 6
    Next i

    'Final round
    CopyMemory s(0), t0, 4&
    CopyMemory s(4), t1, 4&
    CopyMemory s(8), t2, 4&
    CopyMemory s(12), t3, 4&
    CopyMemory s(16), t4, 4&
    CopyMemory s(20), t5, 4&
    t0 = (Td4(s(0)) And &HFF&) Xor (Td4(s(21)) And &HFF00&) Xor (Td4(s(18)) And &HFF0000) Xor (Td4(s(15)) And &HFF000000) Xor rkey(k + 0)
    t1 = (Td4(s(4)) And &HFF&) Xor (Td4(s(1)) And &HFF00&) Xor (Td4(s(22)) And &HFF0000) Xor (Td4(s(19)) And &HFF000000) Xor rkey(k + 1)
    t2 = (Td4(s(8)) And &HFF&) Xor (Td4(s(5)) And &HFF00&) Xor (Td4(s(2)) And &HFF0000) Xor (Td4(s(23)) And &HFF000000) Xor rkey(k + 2)
    t3 = (Td4(s(12)) And &HFF&) Xor (Td4(s(9)) And &HFF00&) Xor (Td4(s(6)) And &HFF0000) Xor (Td4(s(3)) And &HFF000000) Xor rkey(k + 3)
    t4 = (Td4(s(16)) And &HFF&) Xor (Td4(s(13)) And &HFF00&) Xor (Td4(s(10)) And &HFF0000) Xor (Td4(s(7)) And &HFF000000) Xor rkey(k + 4)
    t5 = (Td4(s(20)) And &HFF&) Xor (Td4(s(17)) And &HFF00&) Xor (Td4(s(14)) And &HFF0000) Xor (Td4(s(11)) And &HFF000000) Xor rkey(k + 5)
    CopyMemory plaintext(p + 0), t0, 4&
    CopyMemory plaintext(p + 4), t1, 4&
    CopyMemory plaintext(p + 8), t2, 4&
    CopyMemory plaintext(p + 12), t3, 4&
    CopyMemory plaintext(p + 16), t4, 4&
    CopyMemory plaintext(p + 20), t5, 4&
End Sub

#If SUPPORT_LEVEL = 2 Then
'Encrypt a 224 bit block.  plaintext(p ... p+27) is input, ciphertext(q ... q+27) is output.
'plaintext and ciphertext can be the same array.  Will crash if ciphertext(q ... q+27) is not allocated.
Public Sub Block224Encrypt(plaintext() As Byte, ciphertext() As Byte, p As Long, q As Long)
    Dim i     As Long
    Dim k     As Long
    Dim t0    As Long
    Dim t1    As Long
    Dim t2    As Long
    Dim t3    As Long
    Dim t4    As Long
    Dim t5    As Long
    Dim t6    As Long
    Dim s(27) As Byte

    CopyMemory t0, plaintext(p + 0), 4&
    CopyMemory t1, plaintext(p + 4), 4&
    CopyMemory t2, plaintext(p + 8), 4&
    CopyMemory t3, plaintext(p + 12), 4&
    CopyMemory t4, plaintext(p + 16), 4&
    CopyMemory t5, plaintext(p + 20), 4&
    CopyMemory t6, plaintext(p + 24), 4&
    t0 = t0 Xor fkey(0)
    t1 = t1 Xor fkey(1)
    t2 = t2 Xor fkey(2)
    t3 = t3 Xor fkey(3)
    t4 = t4 Xor fkey(4)
    t5 = t5 Xor fkey(5)
    t6 = t6 Xor fkey(6)
    k = 7

    For i = 1 To Nr - 1 'Nr is number of rounds
        CopyMemory s(0), t0, 4&
        CopyMemory s(4), t1, 4&
        CopyMemory s(8), t2, 4&
        CopyMemory s(12), t3, 4&
        CopyMemory s(16), t4, 4&
        CopyMemory s(20), t5, 4&
        CopyMemory s(24), t6, 4&
        t0 = Te0(s(0)) Xor Te1(s(5)) Xor Te2(s(10)) Xor Te3(s(19)) Xor fkey(k + 0)
        t1 = Te0(s(4)) Xor Te1(s(9)) Xor Te2(s(14)) Xor Te3(s(23)) Xor fkey(k + 1)
        t2 = Te0(s(8)) Xor Te1(s(13)) Xor Te2(s(18)) Xor Te3(s(27)) Xor fkey(k + 2)
        t3 = Te0(s(12)) Xor Te1(s(17)) Xor Te2(s(22)) Xor Te3(s(3)) Xor fkey(k + 3)
        t4 = Te0(s(16)) Xor Te1(s(21)) Xor Te2(s(26)) Xor Te3(s(7)) Xor fkey(k + 4)
        t5 = Te0(s(20)) Xor Te1(s(25)) Xor Te2(s(2)) Xor Te3(s(11)) Xor fkey(k + 5)
        t6 = Te0(s(24)) Xor Te1(s(1)) Xor Te2(s(6)) Xor Te3(s(15)) Xor fkey(k + 6)
        k = k + 7
    Next i

    'Final round
    CopyMemory s(0), t0, 4&
    CopyMemory s(4), t1, 4&
    CopyMemory s(8), t2, 4&
    CopyMemory s(12), t3, 4&
    CopyMemory s(16), t4, 4&
    CopyMemory s(20), t5, 4&
    CopyMemory s(24), t6, 4&
    t0 = (Te4(s(0)) And &HFF&) Xor (Te4(s(5)) And &HFF00&) Xor (Te4(s(10)) And &HFF0000) Xor (Te4(s(19)) And &HFF000000) Xor fkey(k + 0)
    t1 = (Te4(s(4)) And &HFF&) Xor (Te4(s(9)) And &HFF00&) Xor (Te4(s(14)) And &HFF0000) Xor (Te4(s(23)) And &HFF000000) Xor fkey(k + 1)
    t2 = (Te4(s(8)) And &HFF&) Xor (Te4(s(13)) And &HFF00&) Xor (Te4(s(18)) And &HFF0000) Xor (Te4(s(27)) And &HFF000000) Xor fkey(k + 2)
    t3 = (Te4(s(12)) And &HFF&) Xor (Te4(s(17)) And &HFF00&) Xor (Te4(s(22)) And &HFF0000) Xor (Te4(s(3)) And &HFF000000) Xor fkey(k + 3)
    t4 = (Te4(s(16)) And &HFF&) Xor (Te4(s(21)) And &HFF00&) Xor (Te4(s(26)) And &HFF0000) Xor (Te4(s(7)) And &HFF000000) Xor fkey(k + 4)
    t5 = (Te4(s(20)) And &HFF&) Xor (Te4(s(25)) And &HFF00&) Xor (Te4(s(2)) And &HFF0000) Xor (Te4(s(11)) And &HFF000000) Xor fkey(k + 5)
    t6 = (Te4(s(24)) And &HFF&) Xor (Te4(s(1)) And &HFF00&) Xor (Te4(s(6)) And &HFF0000) Xor (Te4(s(15)) And &HFF000000) Xor fkey(k + 6)
    CopyMemory ciphertext(q + 0), t0, 4&
    CopyMemory ciphertext(q + 4), t1, 4&
    CopyMemory ciphertext(q + 8), t2, 4&
    CopyMemory ciphertext(q + 12), t3, 4&
    CopyMemory ciphertext(q + 16), t4, 4&
    CopyMemory ciphertext(q + 20), t5, 4&
    CopyMemory ciphertext(q + 24), t6, 4&
End Sub

'Decrypt a 224 bit block.  ciphertext(q ... q+27) is input, plaintext(p ... p+27) is output.
'plaintext and ciphertext can be the same array.  Will crash if plaintext(p ... p+27) is not allocated.
Public Sub Block224Decrypt(plaintext() As Byte, ciphertext() As Byte, p As Long, q As Long)
    Dim i     As Long
    Dim k     As Long
    Dim t0    As Long
    Dim t1    As Long
    Dim t2    As Long
    Dim t3    As Long
    Dim t4    As Long
    Dim t5    As Long
    Dim t6    As Long
    Dim s(27) As Byte

    CopyMemory t0, ciphertext(q + 0), 4&
    CopyMemory t1, ciphertext(q + 4), 4&
    CopyMemory t2, ciphertext(q + 8), 4&
    CopyMemory t3, ciphertext(q + 12), 4&
    CopyMemory t4, ciphertext(q + 16), 4&
    CopyMemory t5, ciphertext(q + 20), 4&
    CopyMemory t6, ciphertext(q + 24), 4&
    t0 = t0 Xor rkey(0)
    t1 = t1 Xor rkey(1)
    t2 = t2 Xor rkey(2)
    t3 = t3 Xor rkey(3)
    t4 = t4 Xor rkey(4)
    t5 = t5 Xor rkey(5)
    t6 = t6 Xor rkey(6)
    k = 7

    For i = 1 To Nr - 1 'Nr is number of rounds
        CopyMemory s(0), t0, 4&
        CopyMemory s(4), t1, 4&
        CopyMemory s(8), t2, 4&
        CopyMemory s(12), t3, 4&
        CopyMemory s(16), t4, 4&
        CopyMemory s(20), t5, 4&
        CopyMemory s(24), t6, 4&
        t0 = Td0(s(0)) Xor Td1(s(25)) Xor Td2(s(22)) Xor Td3(s(15)) Xor rkey(k + 0)
        t1 = Td0(s(4)) Xor Td1(s(1)) Xor Td2(s(26)) Xor Td3(s(19)) Xor rkey(k + 1)
        t2 = Td0(s(8)) Xor Td1(s(5)) Xor Td2(s(2)) Xor Td3(s(23)) Xor rkey(k + 2)
        t3 = Td0(s(12)) Xor Td1(s(9)) Xor Td2(s(6)) Xor Td3(s(27)) Xor rkey(k + 3)
        t4 = Td0(s(16)) Xor Td1(s(13)) Xor Td2(s(10)) Xor Td3(s(3)) Xor rkey(k + 4)
        t5 = Td0(s(20)) Xor Td1(s(17)) Xor Td2(s(14)) Xor Td3(s(7)) Xor rkey(k + 5)
        t6 = Td0(s(24)) Xor Td1(s(21)) Xor Td2(s(18)) Xor Td3(s(11)) Xor rkey(k + 6)
        k = k + 7
    Next i

    'Final round
    CopyMemory s(0), t0, 4&
    CopyMemory s(4), t1, 4&
    CopyMemory s(8), t2, 4&
    CopyMemory s(12), t3, 4&
    CopyMemory s(16), t4, 4&
    CopyMemory s(20), t5, 4&
    CopyMemory s(24), t6, 4&
    t0 = (Td4(s(0)) And &HFF&) Xor (Td4(s(25)) And &HFF00&) Xor (Td4(s(22)) And &HFF0000) Xor (Td4(s(15)) And &HFF000000) Xor rkey(k + 0)
    t1 = (Td4(s(4)) And &HFF&) Xor (Td4(s(1)) And &HFF00&) Xor (Td4(s(26)) And &HFF0000) Xor (Td4(s(19)) And &HFF000000) Xor rkey(k + 1)
    t2 = (Td4(s(8)) And &HFF&) Xor (Td4(s(5)) And &HFF00&) Xor (Td4(s(2)) And &HFF0000) Xor (Td4(s(23)) And &HFF000000) Xor rkey(k + 2)
    t3 = (Td4(s(12)) And &HFF&) Xor (Td4(s(9)) And &HFF00&) Xor (Td4(s(6)) And &HFF0000) Xor (Td4(s(27)) And &HFF000000) Xor rkey(k + 3)
    t4 = (Td4(s(16)) And &HFF&) Xor (Td4(s(13)) And &HFF00&) Xor (Td4(s(10)) And &HFF0000) Xor (Td4(s(3)) And &HFF000000) Xor rkey(k + 4)
    t5 = (Td4(s(20)) And &HFF&) Xor (Td4(s(17)) And &HFF00&) Xor (Td4(s(14)) And &HFF0000) Xor (Td4(s(7)) And &HFF000000) Xor rkey(k + 5)
    t6 = (Td4(s(24)) And &HFF&) Xor (Td4(s(21)) And &HFF00&) Xor (Td4(s(18)) And &HFF0000) Xor (Td4(s(11)) And &HFF000000) Xor rkey(k + 6)
    CopyMemory plaintext(p + 0), t0, 4&
    CopyMemory plaintext(p + 4), t1, 4&
    CopyMemory plaintext(p + 8), t2, 4&
    CopyMemory plaintext(p + 12), t3, 4&
    CopyMemory plaintext(p + 16), t4, 4&
    CopyMemory plaintext(p + 20), t5, 4&
    CopyMemory plaintext(p + 24), t6, 4&
End Sub
#End If

'Encrypt a 256 bit block.  plaintext(p ... p+31) is input, ciphertext(q ... q+31) is output.
'plaintext and ciphertext can be the same array.  Will crash if ciphertext(q ... q+31) is not allocated.
Public Sub Block256Encrypt(plaintext() As Byte, ciphertext() As Byte, p As Long, q As Long)
    Dim i     As Long
    Dim k     As Long
    Dim t0    As Long
    Dim t1    As Long
    Dim t2    As Long
    Dim t3    As Long
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rijndael.cls - 源码说明

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