'sCode 待加密字串'sKey 密钥字串(前8位有效)Public Sub DES_Encode(ByRef sCode() As Byte, ByVal sKey As String, ByRef bReturn() As Byte)Attribute DES_Encode.VB_Des cription = "加密 sCode:明文16进制串 sKey:密钥文本,前8位有效 bReturn:密文16进制串"Dim tempKey() As Byte '存放密钥Dim BinKey(63) As Byte '64位二进制原始密钥Dim KeyPC_1(55) As Byte '存放56位密钥Dim tempCode(7) As Byte '存放8位原始明文Dim tempReturn(7) As Byte '存放8位密文Dim BinCode(63) As Byte '存放64位明文Dim CodeIP(63) As Byte '存放IP置换结果Dim CodeE(47) As Byte 'E膨胀结果Dim CodeP(31) As Byte 'P变换结果Dim RetS(47) As Byte 'S盒运算32位结果Dim S(7) As Byte 'S盒运算8个结果Dim CodeS1(5) As Byte: Dim CodeS2(5) As Byte: Dim CodeS3(5) As Byte: Dim CodeS4(5) As ByteDim CodeS5(5) As Byte: Dim CodeS6(5) As Byte: Dim CodeS7(5) As Byte: Dim CodeS8(5) As ByteDim L0(31) As Byte: Dim R0(31) As ByteDim L1(31) As Byte: Dim R1(31) As ByteDim L2(31) As Byte: Dim R2(31) As ByteDim L3(31) As Byte: Dim R3(31) As ByteDim L4(31) As Byte: Dim R4(31) As ByteDim L5(31) As Byte: Dim R5(31) As ByteDim L6(31) As Byte: Dim R6(31) As ByteDim L7(31) As Byte: Dim R7(31) As ByteDim L8(31) As Byte: Dim R8(31) As ByteDim L9(31) As Byte: Dim R9(31) As ByteDim L10(31) As Byte: Dim R10(31) As ByteDim L11(31) As Byte: Dim R11(31) As ByteDim L12(31) As Byte: Dim R12(31) As ByteDim L13(31) As Byte: Dim R13(31) As ByteDim L14(31) As Byte: Dim R14(31) As ByteDim L15(31) As Byte: Dim R15(31) As ByteDim L16(31) As Byte: Dim R16(31) As ByteDim C0(27) As Byte: Dim D0(27) As Byte '16个密钥Dim C1(27) As Byte: Dim D1(27) As ByteDim C2(27) As Byte: Dim D2(27) As Byte:Dim C3(27) As Byte: Dim D3(27) As Byte:Dim C4(27) As Byte: Dim D4(27) As Byte:Dim C5(27) As Byte: Dim D5(27) As Byte:Dim C6(27) As Byte: Dim D6(27) As Byte:Dim C7(27) As Byte: Dim D7(27) As Byte:Dim C8(27) As Byte: Dim D8(27) As Byte:Dim C9(27) As Byte: Dim D9(27) As Byte:Dim C10(27) As Byte: Dim D10(27) As Byte:Dim C11(27) As Byte: Dim D11(27) As Byte:Dim C12(27) As Byte: Dim D12(27) As Byte:Dim C13(27) As Byte: Dim D13(27) As Byte:Dim C14(27) As Byte: Dim D14(27) As Byte:Dim C15(27) As Byte: Dim D15(27) As Byte:Dim C16(27) As Byte: Dim D16(27) As Byte:Dim C_D(55) As Byte 'Cn,Dn合并后的存放处Dim K1(47) As Byte: Dim K2(47) As Byte: Dim K3(47) As Byte: Dim K4(47) As Byte:Dim K5(47) As Byte: Dim K6(47) As Byte: Dim K7(47) As Byte: Dim K8(47) As Byte:Dim K9(47) As Byte: Dim K10(47) As Byte: Dim K11(47) As Byte: Dim K12(47) As Byte:Dim K13(47) As Byte: Dim K14(47) As Byte: Dim K15(47) As Byte: Dim K16(47) As Byte:Dim i As IntegerDim j As Integer'取密钥的前8字节tempKey = StrConv(sKey, vbFromUnicode)ReDim Preserve tempKey(7)For i = 0 To 7 BinKey(i * 8 + 0) = (tempKey(i) And &H80) \ &H80 BinKey(i * 8 + 1) = (tempKey(i) And &H40) \ &H40 BinKey(i * 8 + 2) = (tempKey(i) And &H20) \ &H20

BinKey(i * 8 + 3) = (tempKey(i) And &H10) \ &H10 BinKey(i * 8 + 4) = (tempKey(i) And &H8) \ &H8 BinKey(i * 8 + 5) = (tempKey(i) And &H4) \ &H4 BinKey(i * 8 + 6) = (tempKey(i) And &H2) \ &H2 BinKey(i * 8 + 7) = (tempKey(i) And &H1) \ &H1Next'PC_1转换For i = 0 To 55 KeyPC_1(i) = BinKey(PC_1(i))Next'生成C0,D0For i = 0 To 27 C0(i) = KeyPC_1(i) D0(i) = KeyPC_1(i + 28)Next'***************************************************K1'生成C1,D1For i = 0 To 26 C1(i) = C0(i + Lsi(1)) D1(i) = D0(i + Lsi(1))NextC1(27) = C0(0)D1(27) = D0(0)'组合C1,D1成C_DFor i = 0 To 27 C_D(i) = C1(i) C_D(i + 28) = D1(i)Next'PC_2转换,生成K1For i = 0 To 47 K1(i) = C_D(PC_2(i))Next'***************************************************K2'生成C2,D2For i = 0 To 26 C2(i) = C1(i + Lsi(2)) D2(i) = D1(i + Lsi(2))NextC2(27) = C1(0)D2(27) = D1(0)'组合C2,D2成C_DFor i = 0 To 27 C_D(i) = C2(i) C_D(i + 28) = D2(i)Next'PC_2转换,生成K2For i = 0 To 47 K2(i) = C_D(PC_2(i))Next'***************************************************K3'生成C3,D3For i = 0 To 25 C3(i) = C2(i + Lsi(3)) D3(i) = D2(i + Lsi(3))NextC3(26) = C2(0)D3(26) = D2(0)C3(27) = C2(1)D3(27) = D2(1)'组合C3,D3成C_DFor i = 0 To 27 C_D(i) = C3(i) C_D(i + 28) = D3(i)Next'PC_2转换,生成K3For i = 0 To 47 K3(i) = C_D(PC_2(i))Next'***************************************************K4'生成C4,D4For i = 0 To 25 C4(i) = C3(i + Lsi(4)) D4(i) = D3(i + Lsi(4))NextC4(26) = C3(0)D4(26) = D3(0)C4(27) = C3(1)D4(27) = D3(1)'组合C4,D4成C_DFor i = 0 To 27 C_D(i) = C4(i) C_D(i + 28) = D4(i)Next'PC_2转换,生成K4For i = 0 To 47 K4(i) = C_D(PC_2(i))Next'***************************************************K5'生成C5,D5For i = 0 To 25 C5(i) = C4(i + Lsi(5)) D5(i) = D4(i + Lsi(5))NextC5(26) = C4(0)D5(26) = D4(0)C5(27) = C4(1)D5(27) = D4(1)'组合C5,D5成C_DFor i = 0 To 27 C_D(i) = C5(i) C_D(i + 28) = D5(i)Next'PC_2转换,生成K5For i = 0 To 47 K5(i) = C_D(PC_2(i))Next'***************************************************K6'生成C6,D6For i = 0 To 25 C6(i) = C5(i + Lsi(6)) D6(i) = D5(i + Lsi(6))NextC6(26) = C5(0)D6(26) = D5(0)C6(27) = C5(1)D6(27) = D5(1)'组合C6,D6成C_DFor i = 0 To 27 C_D(i) = C6(i) C_D(i + 28) = D6(i)Next'PC_2转换,生成K6For i = 0 To 47 K6(i) = C_D(PC_2(i))Next'***************************************************K7'生成C7,D7For i = 0 To 25 C7(i) = C6(i + Lsi(7)) D7(i) = D6(i + Lsi(7))NextC7(26) = C6(0)D7(26) = D6(0)C7(27) = C6(1)D7(27) = D6(1)'组合C7,D7成C_DFor i = 0 To 27 C_D(i) = C7(i) C_D(i + 28) = D7(i)Next'PC_2转换,生成K7For i = 0 To 47 K7(i) = C_D(PC_2(i))Next'***************************************************K8'生成C8,D8For i = 0 To 25 C8(i) = C7(i + Lsi(8)) D8(i) = D7(i + Lsi(8))

NextC8(26) = C7(0)D8(26) = D7(0)C8(27) = C7(1)D8(27) = D7(1)'组合C8,D8成C_DFor i = 0 To 27 C_D(i) = C8(i) C_D(i + 28) = D8(i)Next'PC_2转换,生成K8For i = 0 To 47 K8(i) = C_D(PC_2(i))Next'***************************************************K9'生成C9,D9For i = 0 To 26 C9(i) = C8(i + Lsi(9)) D9(i) = D8(i + Lsi(9))NextC9(27) = C8(0)D9(27) = D8(0)'组合C9,D9成C_DFor i = 0 To 27 C_D(i) = C9(i) C_D(i + 28) = D9(i)Next'PC_2转换,生成K9For i = 0 To 47 K9(i) = C_D(PC_2(i))Next'***************************************************K10'生成C10,D10For i = 0 To 25 C10(i) = C9(i + Lsi(10)) D10(i) = D9(i + Lsi(10))NextC10(26) = C9(0)D10(26) = D9(0)C10(27) = C9(1)D10(27) = D9(1)'组合C10,D10成C_DFor i = 0 To 27 C_D(i) = C10(i) C_D(i + 28) = D10(i)Next'PC_2转换,生成K10For i = 0 To 47 K10(i) = C_D(PC_2(i))Next'***************************************************K11'生成C11,D11For i = 0 To 25 C11(i) = C10(i + Lsi(11)) D11(i) = D10(i + Lsi(11))NextC11(26) = C10(0)D11(26) = D10(0)C11(27) = C10(1)D11(27) = D10(1)'组合C11,D11成C_DFor i = 0 To 27 C_D(i) = C11(i) C_D(i + 28) = D11(i)Next'PC_2转换,生成K11For i = 0 To 47 K11(i) = C_D(PC_2(i))Next'***************************************************K12'生成C12,D12For i = 0 To 25 C12(i) = C11(i + Lsi(12)) D12(i) = D11(i + Lsi(12))NextC12(26) = C11(0)D12(26) = D11(0)C12(27) = C11(1)D12(27) = D11(1)'组合C12,D12成C_DFor i = 0 To 27 C_D(i) = C12(i) C_D(i + 28) = D12(i)Next'PC_2转换,生成K12For i = 0 To 47 K12(i) = C_D(PC_2(i))Next'***************************************************K13'生成C13,D13For i = 0 To 25 C13(i) = C12(i + Lsi(13)) D13(i) = D12(i + Lsi(13))NextC13(26) = C12(0)D13(26) = D12(0)C13(27) = C12(1)D13(27) = D12(1)'组合C13,D13成C_DFor i = 0 To 27 C_D(i) = C13(i) C_D(i + 28) = D13(i)Next'PC_2转换,生成K13For i = 0 To 47 K13(i) = C_D(PC_2(i))Next'***************************************************K14'生成C14,D14For i = 0 To 25 C14(i) = C13(i + Lsi(14)) D14(i) = D13(i + Lsi(14))NextC14(26) = C13(0)D14(26) = D13(0)C14(27) = C13(1)D14(27) = D13(1)'组合C14,D14成C_DFor i = 0 To 27 C_D(i) = C14(i) C_D(i + 28) = D14(i)Next'PC_2转换,生成K14For i = 0 To 47 K14(i) = C_D(PC_2(i))Next'***************************************************K15'生成C15,D15For i = 0 To 25 C15(i) = C14(i + Lsi(15)) D15(i) = D14(i + Lsi(15))NextC15(26) = C14(0)D15(26) = D14(0)C15(27) = C14(1)D15(27) = D14(1)'组合C15,D15成C_DFor i = 0 To 27 C_D(i) = C15(i) C_D(i + 28) = D15(i)Next'PC_2转换,生成K15For i = 0 To 47 K15(i) = C_D(PC_2(i))Next'***************************************************K16'生成C16,D16For i = 0 To 26 C16(i) = C15(i + Lsi(16)) D16(i) = D15(i + Lsi(16))NextC16(27) = C15(0)

D16(27) = D15(0)'组合C16,D16成C_DFor i = 0 To 27 C_D(i) = C16(i) C_D(i + 28) = D16(i)Next'PC_2转换,生成K16For i = 0 To 47 K16(i) = C_D(PC_2(i))Next'**************************************************************************************'将明文位数扩展为8的倍数If (UBound(sCode) + 1) Mod 8 > 0 Then ReDim Preserve sCode(((UBound(sCode) + 1) \ 8 + 1) * 8 - 1)'定义返回密文长度ReDim bReturn(UBound(sCode))For j = 0 To UBound(sCode) Step 8 '加密过程 '依次取8位加密 CopyMemory tempCode(0), sCode(j), 8 For i = 0 To 7 BinCode(i * 8 + 0) = (tempCode(i) And &H80) \ &H80 BinCode(i * 8 + 1) = (tempCode(i) And &H40) \ &H40 BinCode(i * 8 + 2) = (tempCode(i) And &H20) \ &H20 BinCode(i * 8 + 3) = (tempCode(i) And &H10) \ &H10 BinCode(i * 8 + 4) = (tempCode(i) And &H8) \ &H8 BinCode(i * 8 + 5) = (tempCode(i) And &H4) \ &H4 BinCode(i * 8 + 6) = (tempCode(i) And &H2) \ &H2 BinCode(i * 8 + 7) = (tempCode(i) And &H1) \ &H1 Next 'IP置换 For i = 0 To 63 CodeIP(i) = BinCode(IP(i)) Next '分段 For i = 0 To 31 L0(i) = CodeIP(i) R0(i) = CodeIP(i + 32) Next '进行第一次迭代 For i = 0 To 47 CodeE(i) = R0(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K1(i) '与K1按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L1,R1 R1(i) = L0(i) Xor CodeP(i) L1(i) = R0(i)

Next '进行第二次迭代 For i = 0 To 47 CodeE(i) = R1(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K2(i) '与K2按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L2,R2 R2(i) = L1(i) Xor CodeP(i) L2(i) = R1(i) Next '进行第三次迭代 For i = 0 To 47 CodeE(i) = R2(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K3(i) '与K3按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8)

S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L3,R3 R3(i) = L2(i) Xor CodeP(i) L3(i) = R2(i) Next '进行第四次迭代 For i = 0 To 47 CodeE(i) = R3(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K4(i) '与K4按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L4,R4 R4(i) = L3(i) Xor CodeP(i) L4(i) = R3(i) Next '进行第五次迭代 For i = 0 To 47 CodeE(i) = R4(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K5(i) '与K5按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8)

S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L5,R5 R5(i) = L4(i) Xor CodeP(i) L5(i) = R4(i) Next '进行第六次迭代 For i = 0 To 47 CodeE(i) = R5(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K6(i) '与K6按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L6,R6 R6(i) = L5(i) Xor CodeP(i) L6(i) = R5(i) Next '进行第7次迭代 For i = 0 To 47 CodeE(i) = R6(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K7(i) '与K7按位作不进位加法运算

Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L7,R7 R7(i) = L6(i) Xor CodeP(i) L7(i) = R6(i) Next '进行第8次迭代 For i = 0 To 47 CodeE(i) = R7(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K8(i) '与K8按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果

For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L8,R8 R8(i) = L7(i) Xor CodeP(i) L8(i) = R7(i) Next '进行第9次迭代 For i = 0 To 47 CodeE(i) = R8(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K9(i) '与K9按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L9,R9 R9(i) = L8(i) Xor CodeP(i) L9(i) = R8(i) Next '进行第10次迭代 For i = 0 To 47 CodeE(i) = R9(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K10(i) '与K10按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8)

S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L10,R10 R10(i) = L9(i) Xor CodeP(i) L10(i) = R9(i) Next '进行第11次迭代 For i = 0 To 47 CodeE(i) = R10(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K11(i) '与K11按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L11,R11 R11(i) = L10(i) Xor CodeP(i) L11(i) = R10(i) Next '进行第12次迭代 For i = 0 To 47 CodeE(i) = R11(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K12(i) '与K12按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i)

CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L12,R12 R12(i) = L11(i) Xor CodeP(i) L12(i) = R11(i) Next '进行第13次迭代 For i = 0 To 47 CodeE(i) = R12(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K13(i) '与K13按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4

RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L13,R13 R13(i) = L12(i) Xor CodeP(i) L13(i) = R12(i) Next '进行第14次迭代 For i = 0 To 47 CodeE(i) = R13(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K14(i) '与K14按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L14,R14 R14(i) = L13(i) Xor CodeP(i) L14(i) = R13(i) Next '进行第15次迭代 For i = 0 To 47 CodeE(i) = R14(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K15(i) '与K15按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8)

S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L15,R15 R15(i) = L14(i) Xor CodeP(i) L15(i) = R14(i) Next '进行第16次迭代 For i = 0 To 47 CodeE(i) = R15(E(i)) '经过E变换扩充，由32位变为48位 CodeE(i) = CodeE(i) Xor K16(i) '与K16按位作不进位加法运算 Next '分8组 For i = 0 To 5 CodeS1(i) = CodeE(i) CodeS2(i) = CodeE(i + 6) CodeS3(i) = CodeE(i + 12) CodeS4(i) = CodeE(i + 18) CodeS5(i) = CodeE(i + 24) CodeS6(i) = CodeE(i + 30) CodeS7(i) = CodeE(i + 36) CodeS8(i) = CodeE(i + 42) Next 'S盒运算，得到8个数 S(0) = S1(CodeS1(5) + CodeS1(0) * 2, CodeS1(4) + CodeS1(3) * 2 + CodeS1(2) * 4 + CodeS1(1) * 8) S(1) = S2(CodeS2(5) + CodeS2(0) * 2, CodeS2(4) + CodeS2(3) * 2 + CodeS2(2) * 4 + CodeS2(1) * 8) S(2) = S3(CodeS3(5) + CodeS3(0) * 2, CodeS3(4) + CodeS3(3) * 2 + CodeS3(2) * 4 + CodeS3(1) * 8) S(3) = S4(CodeS4(5) + CodeS4(0) * 2, CodeS4(4) + CodeS4(3) * 2 + CodeS4(2) * 4 + CodeS4(1) * 8) S(4) = S5(CodeS5(5) + CodeS5(0) * 2, CodeS5(4) + CodeS5(3) * 2 + CodeS5(2) * 4 + CodeS5(1) * 8) S(5) = S6(CodeS6(5) + CodeS6(0) * 2, CodeS6(4) + CodeS6(3) * 2 + CodeS6(2) * 4 + CodeS6(1) * 8) S(6) = S7(CodeS7(5) + CodeS7(0) * 2, CodeS7(4) + CodeS7(3) * 2 + CodeS7(2) * 4 + CodeS7(1) * 8) S(7) = S8(CodeS8(5) + CodeS8(0) * 2, CodeS8(4) + CodeS8(3) * 2 + CodeS8(2) * 4 + CodeS8(1) * 8) 'S盒运算32位结果 For i = 0 To 7 RetS(i * 4 + 0) = (S(i) And &H8) \ &H8 RetS(i * 4 + 1) = (S(i) And &H4) \ &H4 RetS(i * 4 + 2) = (S(i) And &H2) \ &H2 RetS(i * 4 + 3) = (S(i) And &H1) \ &H1 Next For i = 0 To 31 'P变换 CodeP(i) = RetS(P(i)) '产生L11,R11 R16(i) = L15(i) Xor CodeP(i) L16(i) = R15(i) Next For i = 0 To 31 BinCode(i) = L16(i) BinCode(i + 32) = R16(i) Next For i = 0 To 63 CodeIP(i) = BinCode(IP_1(i)) Next For i = 0 To 7 tempReturn(i) = CodeIP(i * 8 + 0) * &H80 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 1) * &H40 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 2) * &H20 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 3) * &H10 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 4) * &H8 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 5) * &H4 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 6) * &H2 tempReturn(i) = tempReturn(i) + CodeIP(i * 8 + 7) * &H1 Next CopyMemory bReturn(j), tempReturn(0), 8NextEnd Sub

调试过没有？不通过的程序别贴上来，占空间的不懂的也别乱贴

确实不能用