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AES-128的verilog实现_aes 128 verilog

作者：黑客灵魂 | 2024-07-20 11:12:06

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aes 128 verilog

原理部分可以参考：AES加密算法原理的详细介绍与实现_TimeShatter的博客-CSDN博客​​​​​废话不多说直接上代码：​​​​​​​

2024.5.8:在评论区更新了最新的代码，和官方文档加解密结果一致

主要模块：aes_main模块

  1. module aes_main (
  2.     input wire [127:0] plaintext, // 输入明文
  3.     input wire [128*11-1:0] round_keys ,  // 输入密钥
  4.     input [5:0]state,
  5.     input clk,
  6.     input rst,
  7.     output wire [127:0] ciphertext,// 输出密文
  8.     output wire [127:0] plaintext_1// 输出恢复明文
  9. );
  10.     integer k;
  11.     reg [127:0] round_key [0:10];
  12.     always @(*)begin
  13.         for(k=0;k<=10;k=k+1)begin
  14.             round_key[k]=round_keys[128*k +:128];
  15.         end
  16.     end
  17.     reg[127:0]mid_value;
  18.     reg[127:0]mid_value_1;
  19.     wire [127:0]data[0:9];
  20.     wire [127:0]data_1[0:9];
  21.     assign data[0] = mid_value;
  22.     assign data_1[0]=mid_value_1;
  23.     // 初始轮
  24.     always @(posedge clk or negedge rst) begin
  25.         if (!rst) begin
  26.             mid_value<=128'b0;
  27.         end
  28.         else begin
  29.             case (state)
  30.                 12: mid_value<=plaintext^round_key[0];// 初始轮 
  31.             endcase
  32.         end
  33.     end
  34.     // 轮函数
  35.     genvar i;
  36.     generate
  37.         for (i = 1; i < 10; i = i + 1) begin : round
  38.             aes_round round (
  39.                 .state(data[i-1]),
  40.                 .round_key(round_key[i]),
  41.                 .next_state(data[i]),
  42.                 .clk(clk),
  43.                 .rst(rst)
  44.             );
  45.         end
  46.     endgenerate
  48.     // 最后一轮
  49.     final_round final (
  50.         .state(data[9]),
  51.         .round_key(round_key[10]),
  52.         .ciphertext(ciphertext)
  53.     );
  55.     // 初始轮
  56.     always @(posedge clk or negedge rst) begin
  57.         if (!rst) begin
  58.             mid_value_1<=128'b0;
  59.         end
  60.         else begin
  61.             case (state)
  62.                 22: mid_value_1<=ciphertext^round_key[10];// 初始轮 
  63.             endcase
  64.         end
  65.     end
  66.     //逆轮变换
  67.     genvar j;
  68.     generate
  69.         for (j = 1; j < 10; j = j + 1) begin : round_1
  70.             inv_aes_round inv_round (
  71.                 .state(data_1[j-1]),
  72.                 .round_key(round_key[10-j]),
  73.                 .next_state(data_1[j]),
  74.                 .clk(clk),
  75.                 .rst(rst)
  76.             );
  77.         end
  78.     endgenerate 
  79.     // 最后一轮
  80.     inv_final_round inv_final (
  81.         .state(data_1[9]),
  82.         .round_key(round_key[0]),
  83.         .ciphertext(plaintext_1)
  84.     );   
  85. endmodule

  1. 模块定义：

    • 模块名为 aes_main。
    • 输入信号包括明文 plaintext，密钥 round_keys，状态 state，时钟信号 clk，复位信号 rst。
    • 输出信号包括密文 ciphertext 和恢复的明文 plaintext_1。

  2. 整数 k 和 reg 数组 round_key 用于存储轮密钥。

  3. always 块用于将 round_keys 分解成各轮的密钥存储在 round_key 数组中。

  4. mid_value 和 mid_value_1 是用于存储中间数据的寄存器。

  5. data 和 data_1 数组用于存储每轮的数据。

  6. 初始轮（Initialization Round）：

    • 使用 always 块，根据 state 的值来执行初始轮操作。在状态为 12 时，执行 plaintext 和第一轮密钥的异或操作，并将结果存储在 mid_value 中。

  7. 轮函数（Round Function）：

    • 使用 generate 区块创建轮函数。它包括一个循环，从第二轮到第九轮。每轮都使用名为 aes_round 的子模块进行处理，传递前一轮的状态数据、当前轮的密钥、时钟信号和复位信号。

  8. 最后一轮（Final Round）：

    • 使用名为 final_round 的子模块，将第十轮的状态数据和密钥传递给它，生成最终的密文 ciphertext。

  9. 逆初始轮和逆轮变换：

    • 类似于初始轮，使用 always 块执行逆初始轮操作。在状态为 22 时，执行密文和第十轮密钥的异或操作，并将结果存储在 mid_value_1 中。
    • 使用 generate 区块创建逆轮变换。它包括一个循环，从第二轮到第九轮，与加密轮函数相反。每轮都使用名为 inv_aes_round 的子模块进行处理。

  10. 逆最后一轮：

    • 使用名为 inv_final_round 的子模块，将第一轮密钥和逆变换后的状态数据传递给它，生成恢复的明文 plaintext_1。

这个模块实际上是一个高级的AES加密和解密模块，通过组合不同的轮函数来实现加密和解密过程。它依赖于子模块（aes_round、final_round、inv_aes_round、inv_final_round）来执行每个轮的操作，而这些子模块的实现需要在代码中提供。此外，模块还需要外部提供的密钥和状态信息来控制加密和解密过程。

2.aes_round是轮运行模块

  1. module aes_round (
  2.     input clk,
  3.     input rst,
  4.     input wire [127:0] state,         // 输入状态
  5.     input wire [127:0] round_key,     // 输入轮密钥
  6.     output reg [127:0] next_state    // 输出下一轮状态
  7. );
  8.     // 定义中间信号
  9.     wire [127:0] sub_bytes_out;
  10.     wire [127:0] shift_rows_out;
  11.     wire [127:0] mix_columns_out;
  12.     wire [127:0] add_round_key_out;
  13.  
  14.     // 16个S盒子实例化
  15.     genvar j;
  16.     generate
  17.         for (j = 0; j < 16; j = j + 1) begin
  18.             s_box s_box_inst (
  19.                 .in_byte(state[8*j +: 8]),
  20.                 .out_byte(sub_bytes_out[8*j +: 8])
  21.             );
  22.         end
  23.     endgenerate
  24.  
  25.     // 行移位子模块实例化
  26.     shift_rows shift_rows_inst (
  27.         .in_state(sub_bytes_out),
  28.         .out_state(shift_rows_out)
  29.     );
  30.  
  31.     // 列混淆子模块实例化
  32.     genvar i;
  33.     generate
  34.         for (i = 0; i < 4; i = i + 1) begin
  35.             mix_col mix_col_inst (
  36.                 .s0(shift_rows_out[32*i +:8]),
  37.                 .s1(shift_rows_out[32*i+8 +:8]),
  38.                 .s2(shift_rows_out[32*i+16 +:8]),
  39.                 .s3(shift_rows_out[32*i+24 +:8]),
  40.                 .mix_col_0(mix_columns_out[32*i +:8]),
  41.                 .mix_col_1(mix_columns_out[32*i+8 +:8]),
  42.                 .mix_col_2(mix_columns_out[32*i+16 +:8]),
  43.                 .mix_col_3(mix_columns_out[32*i+24 +:8])
  44.             );
  45.         end
  46.     endgenerate
  47.     // 轮密钥加
  48.     assign add_round_key_out = mix_columns_out ^ round_key;
  49.  
  50.     // 输出下一轮状态
  51.     always @(posedge clk or negedge rst) begin
  52.         if (!rst) begin
  53.             next_state<=128'b0;
  54.         end
  55.         else begin
  56.             next_state <= add_round_key_out;
  57.         end
  58.     end
  60. endmodule

3.下面是顶层模块

  1. module aes_top (
  2.     input wire clk,  // 时钟输入
  3.     input wire rst   // 复位输入
  4. );
  5.     localparam key=128'h0123456789ABCDEF0123456789ABCDEF;
  6.     localparam plaintext=128'h5E6C6C152BBC01B8961A2DED00822B0E;
  7.     wire [5:0] state;
  8.     wire [128*11-1:0]round_keys;
  9.     wire [127:0]ciphertext;
  10.     fsm fsm_inst(
  11.         .clk(clk),
  12.         .rst(rst),
  13.         .state(state)
  14.     );
  15.     key_exp key_exp_inst(
  16.         .clk(clk),
  17.         .state(state),
  18.         .rst(rst),
  19.         .key(key),
  20.         .round_key(round_keys)
  21.     );
  22.     aes_main aes_main_inst(
  23.         .clk(clk),
  24.         .rst(rst),
  25.         .state(state),
  26.         .round_keys(round_keys),
  27.         .plaintext(plaintext),
  28.         .ciphertext(ciphertext)
  29.     );
  30. endmodule

4.最后一轮

  1. module final_round (
  2.     input wire [127:0] state,         // 输入状态
  3.     input wire [127:0] round_key,     // 输入轮密钥
  4.     output wire [127:0] ciphertext    // 输出下一轮状态
  5. );
  6.     // 定义中间信号
  7.     wire [127:0] sub_bytes_out;
  8.     wire [127:0] shift_rows_out;
  9.  
  10.  
  11.  
  12.     // 16个S盒子实例化
  13.     genvar i;
  14.     generate
  15.         for (i = 0; i < 16; i = i + 1) begin
  16.             s_box s_box_inst (
  17.                 .in_byte(state[8*i +: 8]),
  18.                 .out_byte(sub_bytes_out[8*i +: 8])
  19.             );
  20.         end
  21.     endgenerate
  22.  
  23.     // 行移位子模块实例化
  24.     shift_rows shift_rows_inst (
  25.         .in_state(sub_bytes_out),
  26.         .out_state(shift_rows_out)
  27.     );
  28.  
  29.     // 轮密钥加
  30.     assign ciphertext = shift_rows_out ^ round_key;
  31. endmodule

5.写了个状态机表示state状态

  1. module fsm(
  2.     input clk,
  3.     input rst,
  4.     output reg [5:0]state
  5. );
  6.     always @(posedge clk or negedge rst) begin
  7.         if (!rst) begin
  8.             state<=6'b0;
  9.         end
  10.         else begin
  11.             state<=state+1'b1;
  12.         end
  13.     end
  14. endmodule

6.解密的轮模块

  1. module inv_aes_round (
  2.     input clk,
  3.     input rst,
  4.     input wire [127:0] state,         // 输入状态
  5.     input wire [127:0] round_key,     // 输入轮密钥
  6.     output reg [127:0] next_state    // 输出下一轮状态
  7. );
  8.     // 定义中间信号
  9.     wire [127:0] sub_bytes_out;
  10.     wire [127:0] shift_rows_out;
  11.     wire [127:0] mix_columns_out;
  12.     wire [127:0] add_round_key_out;
  13.  
  14.     // 16个S盒子实例化
  15.     genvar j;
  16.     generate
  17.         for (j = 0; j < 16; j = j + 1) begin
  18.             inv_s_box inv_s_box_inst (
  19.                 .in_byte(shift_rows_out[8*j +: 8]),
  20.                 .out_byte(sub_bytes_out[8*j +: 8])
  21.             );
  22.         end
  23.     endgenerate
  24.  
  25.     // 行移位子模块实例化
  26.     inv_shift_rows inv_shift_rows_inst (
  27.         .in_state(state),
  28.         .out_state(shift_rows_out)
  29.     );
  30.  
  31.     // 列混淆子模块实例化
  32.     genvar i;
  33.     generate
  34.         for (i = 0; i < 4; i = i + 1) begin
  35.             inv_mix_col inv_mix_col_inst (
  36.                 .s0(add_round_key_out[32*i +:8]),
  37.                 .s1(add_round_key_out[32*i+8 +:8]),
  38.                 .s2(add_round_key_out[32*i+16 +:8]),
  39.                 .s3(add_round_key_out[32*i+24 +:8]),
  40.                 .inv_mix_col_0(mix_columns_out[32*i +:8]),
  41.                 .inv_mix_col_1(mix_columns_out[32*i+8 +:8]),
  42.                 .inv_mix_col_2(mix_columns_out[32*i+16 +:8]),
  43.                 .inv_mix_col_3(mix_columns_out[32*i+24 +:8])
  44.             );
  45.         end
  46.     endgenerate
  47.     // 轮密钥加
  48.     assign add_round_key_out = sub_bytes_out ^ round_key;
  49.  
  50.     // 输出下一轮状态
  51.     always @(posedge clk or negedge rst) begin
  52.         if (!rst) begin
  53.             next_state<=128'b0;
  54.         end
  55.         else begin
  56.             next_state <= mix_columns_out;
  57.         end
  58.     end
  60. endmodule

7.解密的最终轮模块

  1. module inv_final_round (
  2.     input wire [127:0] state,         // 输入状态
  3.     input wire [127:0] round_key,     // 输入轮密钥
  4.     output wire [127:0] ciphertext    // 输出下一轮状态
  5. );
  6.     // 定义中间信号
  7.     wire [127:0] sub_bytes_out;
  8.     wire [127:0] shift_rows_out;
  9.  
  10.  
  11.  
  12.     // 16个S盒子实例化
  13.     genvar i;
  14.     generate
  15.         for (i = 0; i < 16; i = i + 1) begin
  16.             inv_s_box inv_s_box_inst (
  17.                 .in_byte(shift_rows_out[8*i +: 8]),
  18.                 .out_byte(sub_bytes_out[8*i +: 8])
  19.             );
  20.         end
  21.     endgenerate
  22.  
  23.     // 行移位子模块实例化
  24.     inv_shift_rows inv_shift_rows_inst (
  25.         .in_state(state),
  26.         .out_state(shift_rows_out)
  27.     );
  28.  
  29.     // 轮密钥加
  30.     assign ciphertext = sub_bytes_out ^ round_key;
  31. endmodule

8.逆列混合模块

  1. module inv_mix_col(
  2.     input [7:0] s0, s1, s2, s3,
  3.     output reg [7:0] inv_mix_col_0,
  4.     output reg [7:0] inv_mix_col_1,
  5.     output reg [7:0] inv_mix_col_2,
  6.     output reg [7:0] inv_mix_col_3
  7. );
  8.  
  9.  
  10.  
  11. //logic: decryption mixcolumns
  12.  
  13. always @(s0,s1,s2,s3)begin
  14.  
  15.     inv_mix_col_0=pmul_e(s0)^pmul_b(s1)^pmul_d(s2)^pmul_9(s3);
  16.  
  17.     inv_mix_col_1=pmul_9(s0)^pmul_e(s1)^pmul_b(s2)^pmul_d(s3);
  18.  
  19.     inv_mix_col_2=pmul_d(s0)^pmul_9(s1)^pmul_e(s2)^pmul_b(s3);
  20.  
  21.     inv_mix_col_3=pmul_b(s0)^pmul_d(s1)^pmul_9(s2)^pmul_e(s3);
  22. end
  23.  
  24.  
  25.  
  26. //function
  27.  
  28. function [7:0] pmul_e;
  29.  
  30. input [7:0] b;
  31.  
  32. reg [7:0] two,four,eight;
  33.  
  34. begin
  35.  
  36. two=gf8_2(b);
  37.  
  38. four=gf8_2(two);
  39.  
  40. eight=gf8_2(four);
  41.  
  42. pmul_e=eight^four^two;
  43.  
  44. end
  45.  
  46. endfunction
  47.  
  48.  
  49.  
  50. function [7:0] pmul_9;
  51.  
  52. input [7:0] b;
  53.  
  54. reg [7:0] two,four,eight;
  55.  
  56. begin
  57.  
  58. two=gf8_2(b);
  59.  
  60. four=gf8_2(two);
  61.  
  62. eight=gf8_2(four);
  63.  
  64. pmul_9=eight^b;
  65.  
  66. end
  67.  
  68. endfunction
  69.  
  70.  
  71.  
  72. function [7:0] pmul_d;
  73.  
  74. input [7:0] b;
  75.  
  76. reg [7:0] two,four,eight;
  77.  
  78. begin
  79.  
  80. two=gf8_2(b);
  81.  
  82. four=gf8_2(two);
  83.  
  84. eight=gf8_2(four);
  85.  
  86. pmul_d=eight^four^b;
  87.  
  88. end
  89.  
  90. endfunction
  91.  
  92.  
  93.  
  94. function [7:0] pmul_b;
  95.  
  96. input [7:0] b;
  97.  
  98. reg [7:0] two,four,eight;
  99.  
  100. begin
  101.  
  102. two=gf8_2(b);
  103.  
  104. four=gf8_2(two);
  105.  
  106. eight=gf8_2(four);
  107.  
  108. pmul_b=eight^two^b;
  109.  
  110. end
  111.  
  112. endfunction
  113.  
  114.  
  115.  
  116. function [7:0] gf8_2;
  117.  
  118. input [7:0] b;
  119.  
  120. gf8_2={b[6:0],1'b0}^(8'h1b&{8{b[7]}});
  121.  
  122. endfunction
  123.  
  124. endmodule

9.逆s盒模块

  1. module inv_s_box(
  2.     input [7:0] in_byte,
  3.     output reg [7:0] out_byte
  4. );
  5. /*
  6. // 16x16 Inverse S-box lookup table
  7. reg [7:0] inv_s_box [0:255] = {
  8.     8'h52, 8'h09, 8'h6a, 8'hd5, 8'h30, 8'h36, 8'ha5, 8'h38, 8'hbf, 8'h40, 8'ha3, 8'h9e, 8'h81, 8'hf3, 8'hd7, 8'hfb,
  9.     8'h7c, 8'hE3, 8'h39, 8'h82, 8'h9b, 8'h2f, 8'hff, 8'h87, 8'h34, 8'h8e, 8'h43, 8'h44, 8'hc4, 8'hde, 8'hE9, 8'hcb,
  10.     8'h54, 8'h7b, 8'h94, 8'h32, 8'hA6, 8'hC2, 8'h23, 8'h3d, 8'hEE, 8'h4C, 8'h95, 8'h0B, 8'h42, 8'hFA, 8'hC3, 8'h4E,
  11.     8'h08, 8'h2E, 8'hA1, 8'h66, 8'h28, 8'hD9, 8'h24, 8'hB2, 8'h76, 8'h5B, 8'hA2, 8'h49, 8'h6D, 8'h8B, 8'hD1, 8'h25,
  12.     8'h72, 8'hF8, 8'hF6, 8'h64, 8'h86, 8'h68, 8'h98, 8'h16, 8'hD4, 8'hA4, 8'h5C, 8'hCC, 8'h5D, 8'h65, 8'hB6, 8'h92,
  13.     8'h6C, 8'h70, 8'h48, 8'h50, 8'hFD, 8'hED, 8'hB9, 8'hDA, 8'h5E, 8'h15, 8'h46, 8'h57, 8'hA7, 8'h8D, 8'h9D, 8'h84,
  14.     8'h90, 8'hD8, 8'hAB, 8'h00, 8'h8C, 8'hBC, 8'hD3, 8'h0A, 8'hF7, 8'hE4, 8'h58, 8'h05, 8'hB8, 8'hB3, 8'h45, 8'h06,
  15.     8'hD0, 8'h2C, 8'h1E, 8'h8F, 8'hCA, 8'h3F, 8'h0F, 8'h02, 8'hC1, 8'hAF, 8'hBD, 8'h03, 8'h01, 8'h13, 8'h8A, 8'h6B,
  16.     8'h3A, 8'h91, 8'h11, 8'h41, 8'h4F, 8'h67, 8'hDC, 8'hEA, 8'h97, 8'hF2, 8'hCF, 8'hCE, 8'hF0, 8'hB4, 8'hE6, 8'h73,
  17.     8'h96, 8'hAC, 8'h74, 8'h22, 8'hE7, 8'hAD, 8'h35, 8'h85, 8'hE2, 8'hF9, 8'h37, 8'hE8, 8'h1C, 8'h75, 8'hDF, 8'h6E,
  18.     8'h47, 8'hF1, 8'h1A, 8'h71, 8'h1D, 8'h29, 8'hC5, 8'h89, 8'h6F, 8'hB7, 8'h62, 8'h0E, 8'hAA, 8'h18, 8'hBE, 8'h1B,
  19.     8'hFC, 8'h56, 8'h3E, 8'h4B, 8'hC6, 8'hD2, 8'h79, 8'h20, 8'h9A, 8'hDB, 8'hC0, 8'hFE, 8'h78, 8'hCD, 8'h5A, 8'hF4,
  20.     8'h1F, 8'hDD, 8'hA8, 8'h33, 8'h88, 8'h07, 8'hC7, 8'h31, 8'hB1, 8'h12, 8'h10, 8'h59, 8'h27, 8'h80, 8'hEC, 8'h5F,
  21.     8'h60, 8'h51, 8'h7F, 8'hA9, 8'h19, 8'hB5, 8'h4A, 8'h0D, 8'h2D, 8'hE5, 8'h7A, 8'h9F, 8'h93, 8'hC9, 8'h9C, 8'hEF,
  22.     8'hA0, 8'hE0, 8'h3B, 8'h4D, 8'hAE, 8'h2A, 8'hF5, 8'hB0, 8'hC8, 8'hEB, 8'hBB, 8'h3C, 8'h83, 8'h53, 8'h99, 8'h61,
  23.     8'h17, 8'h2B, 8'h04, 8'h7E, 8'hBA, 8'h77, 8'hD6, 8'h26, 8'hE1, 8'h69, 8'h14, 8'h63, 8'h55, 8'h21, 8'h0C, 8'h7D
  24. };*/
  25.     always @(in_byte) begin
  26.         case (in_byte)
  27.             8'h00: out_byte = 8'h52;
  28.             8'h01: out_byte = 8'h09;
  29.             8'h02: out_byte = 8'h6A;
  30.             8'h03: out_byte = 8'hD5;
  31.             8'h04: out_byte = 8'h30;
  32.             8'h05: out_byte = 8'h36;
  33.             8'h06: out_byte = 8'hA5;
  34.             8'h07: out_byte = 8'h38;
  35.             8'h08: out_byte = 8'hBF;
  36.             8'h09: out_byte = 8'h40;
  37.             8'h0A: out_byte = 8'hA3;
  38.             8'h0B: out_byte = 8'h9E;
  39.             8'h0C: out_byte = 8'h81;
  40.             8'h0D: out_byte = 8'hF3;
  41.             8'h0E: out_byte = 8'hD7;
  42.             8'h0F: out_byte = 8'hFB;
  43.             8'h10: out_byte = 8'h7C;
  44.             8'h11: out_byte = 8'hE3;
  45.             8'h12: out_byte = 8'h39;
  46.             8'h13: out_byte = 8'h82;
  47.             8'h14: out_byte = 8'h9B;
  48.             8'h15: out_byte = 8'h2F;
  49.             8'h16: out_byte = 8'hFF;
  50.             8'h17: out_byte = 8'h87;
  51.             8'h18: out_byte = 8'h34;
  52.             8'h19: out_byte = 8'h8E;
  53.             8'h1A: out_byte = 8'h43;
  54.             8'h1B: out_byte = 8'h44;
  55.             8'h1C: out_byte = 8'hC4;
  56.             8'h1D: out_byte = 8'hDE;
  57.             8'h1E: out_byte = 8'hE9;
  58.             8'h1F: out_byte = 8'hCB;
  59.             8'h20: out_byte = 8'h54;
  60.             8'h21: out_byte = 8'h7B;
  61.             8'h22: out_byte = 8'h94;
  62.             8'h23: out_byte = 8'h32;
  63.             8'h24: out_byte = 8'hA6;
  64.             8'h25: out_byte = 8'hC2;
  65.             8'h26: out_byte = 8'h23;
  66.             8'h27: out_byte = 8'h3D;
  67.             8'h28: out_byte = 8'hEE;
  68.             8'h29: out_byte = 8'h4C;
  69.             8'h2A: out_byte = 8'h95;
  70.             8'h2B: out_byte = 8'h0B;
  71.             8'h2C: out_byte = 8'h42;
  72.             8'h2D: out_byte = 8'hFA;
  73.             8'h2E: out_byte = 8'hC3;
  74.             8'h2F: out_byte = 8'h4E;
  75.             8'h30: out_byte = 8'h08;
  76.             8'h31: out_byte = 8'h2E;
  77.             8'h32: out_byte = 8'hA1;
  78.             8'h33: out_byte = 8'h66;
  79.             8'h34: out_byte = 8'h28;
  80.             8'h35: out_byte = 8'hD9;
  81.             8'h36: out_byte = 8'h24;
  82.             8'h37: out_byte = 8'hB2;
  83.             8'h38: out_byte = 8'h76;
  84.             8'h39: out_byte = 8'h5B;
  85.             8'h3A: out_byte = 8'hA2;
  86.             8'h3B: out_byte = 8'h49;
  87.             8'h3C: out_byte = 8'h6D;
  88.             8'h3D: out_byte = 8'h8B;
  89.             8'h3E: out_byte = 8'hD1;
  90.             8'h3F: out_byte = 8'h25;
  91.             8'h40: out_byte = 8'h72;
  92.             8'h41: out_byte = 8'hF8;
  93.             8'h42: out_byte = 8'hF6;
  94.             8'h43: out_byte = 8'h64;
  95.             8'h44: out_byte = 8'h86;
  96.             8'h45: out_byte = 8'h68;
  97.             8'h46: out_byte = 8'h98;
  98.             8'h47: out_byte = 8'h16;
  99.             8'h48: out_byte = 8'hD4;
  100.             8'h49: out_byte = 8'hA4;
  101.             8'h4A: out_byte = 8'h5C;
  102.             8'h4B: out_byte = 8'hCC;
  103.             8'h4C: out_byte = 8'h5D;
  104.             8'h4D: out_byte = 8'h65;
  105.             8'h4E: out_byte = 8'hB6;
  106.             8'h4F: out_byte = 8'h92;
  107.             8'h50: out_byte = 8'h6C;
  108.             8'h51: out_byte = 8'h70;
  109.             8'h52: out_byte = 8'h48;
  110.             8'h53: out_byte = 8'h50;
  111.             8'h54: out_byte = 8'hFD;
  112.             8'h55: out_byte = 8'hED;
  113.             8'h56: out_byte = 8'hB9;
  114.             8'h57: out_byte = 8'hDA;
  115.             8'h58: out_byte = 8'h5E;
  116.             8'h59: out_byte = 8'h15;
  117.             8'h5A: out_byte = 8'h46;
  118.             8'h5B: out_byte = 8'h57;
  119.             8'h5C: out_byte = 8'hA7;
  120.             8'h5D: out_byte = 8'h8D;
  121.             8'h5E: out_byte = 8'h9D;
  122.             8'h5F: out_byte = 8'h84;
  123.             8'h60: out_byte = 8'h90;
  124.             8'h61: out_byte = 8'hD8;
  125.             8'h62: out_byte = 8'hAB;
  126.             8'h63: out_byte = 8'h00;
  127.             8'h64: out_byte = 8'h8C;
  128.             8'h65: out_byte = 8'hBC;
  129.             8'h66: out_byte = 8'hD3;
  130.             8'h67: out_byte = 8'h0A;
  131.             8'h68: out_byte = 8'hF7;
  132.             8'h69: out_byte = 8'hE4;
  133.             8'h6A: out_byte = 8'h58;
  134.             8'h6B: out_byte = 8'h05;
  135.             8'h6C: out_byte = 8'hB8;
  136.             8'h6D: out_byte = 8'hB3;
  137.             8'h6E: out_byte = 8'h45;
  138.             8'h6F: out_byte = 8'h06;
  139.             8'h70: out_byte = 8'hD0;
  140.             8'h71: out_byte = 8'h2C;
  141.             8'h72: out_byte = 8'h1E;
  142.             8'h73: out_byte = 8'h8F;
  143.             8'h74: out_byte = 8'hCA;
  144.             8'h75: out_byte = 8'h3F;
  145.             8'h76: out_byte = 8'h0F;
  146.             8'h77: out_byte = 8'h02;
  147.             8'h78: out_byte = 8'hC1;
  148.             8'h79: out_byte = 8'hAF;
  149.             8'h7A: out_byte = 8'hBD;
  150.             8'h7B: out_byte = 8'h03;
  151.             8'h7C: out_byte = 8'h01;
  152.             8'h7D: out_byte = 8'h13;
  153.             8'h7E: out_byte = 8'h8A;
  154.             8'h7F: out_byte = 8'h6B;
  155.             8'h80: out_byte = 8'h3A;
  156.             8'h81: out_byte = 8'h91;
  157.             8'h82: out_byte = 8'h11;
  158.             8'h83: out_byte = 8'h41;
  159.             8'h84: out_byte = 8'h4F;
  160.             8'h85: out_byte = 8'h67;
  161.             8'h86: out_byte = 8'hDC;
  162.             8'h87: out_byte = 8'hEA;
  163.             8'h88: out_byte = 8'h97;
  164.             8'h89: out_byte = 8'hF2;
  165.             8'h8A: out_byte = 8'hCF;
  166.             8'h8B: out_byte = 8'hCE;
  167.             8'h8C: out_byte = 8'hF0;
  168.             8'h8D: out_byte = 8'hB4;
  169.             8'h8E: out_byte = 8'hE6;
  170.             8'h8F: out_byte = 8'h73;
  171.             8'h90: out_byte = 8'h96;
  172.             8'h91: out_byte = 8'hAC;
  173.             8'h92: out_byte = 8'h74;
  174.             8'h93: out_byte = 8'h22;
  175.             8'h94: out_byte = 8'hE7;
  176.             8'h95: out_byte = 8'hAD;
  177.             8'h96: out_byte = 8'h35;
  178.             8'h97: out_byte = 8'h85;
  179.             8'h98: out_byte = 8'hE2;
  180.             8'h99: out_byte = 8'hF9;
  181.             8'h9A: out_byte = 8'h37;
  182.             8'h9B: out_byte = 8'hE8;
  183.             8'h9C: out_byte = 8'h1C;
  184.             8'h9D: out_byte = 8'h75;
  185.             8'h9E: out_byte = 8'hDF;
  186.             8'h9F: out_byte = 8'h6E;
  187.             8'hA0: out_byte = 8'h47;
  188.             8'hA1: out_byte = 8'hF1;
  189.             8'hA2: out_byte = 8'h1A;
  190.             8'hA3: out_byte = 8'h71;
  191.             8'hA4: out_byte = 8'h1D;
  192.             8'hA5: out_byte = 8'h29;
  193.             8'hA6: out_byte = 8'hC5;
  194.             8'hA7: out_byte = 8'h89;
  195.             8'hA8: out_byte = 8'h6F;
  196.             8'hA9: out_byte = 8'hB7;
  197.             8'hAA: out_byte = 8'h62;
  198.             8'hAB: out_byte = 8'h0E;
  199.             8'hAC: out_byte = 8'hAA;
  200.             8'hAD: out_byte = 8'h18;
  201.             8'hAE: out_byte = 8'hBE;
  202.             8'hAF: out_byte = 8'h1B;
  203.             8'hB0: out_byte = 8'hFC;
  204.             8'hB1: out_byte = 8'h56;
  205.             8'hB2: out_byte = 8'h3E;
  206.             8'hB3: out_byte = 8'h4B;
  207.             8'hB4: out_byte = 8'hC6;
  208.             8'hB5: out_byte = 8'hD2;
  209.             8'hB6: out_byte = 8'h79;
  210.             8'hB7: out_byte = 8'h20;
  211.             8'hB8: out_byte = 8'h9A;
  212.             8'hB9: out_byte = 8'hDB;
  213.             8'hBA: out_byte = 8'hC0;
  214.             8'hBB: out_byte = 8'hFE;
  215.             8'hBC: out_byte = 8'h78;
  216.             8'hBD: out_byte = 8'hCD;
  217.             8'hBE: out_byte = 8'h5A;
  218.             8'hBF: out_byte = 8'hF4;
  219.             8'hC0: out_byte = 8'h1F;
  220.             8'hC1: out_byte = 8'hDD;
  221.             8'hC2: out_byte = 8'hA8;
  222.             8'hC3: out_byte = 8'h33;
  223.             8'hC4: out_byte = 8'h88;
  224.             8'hC5: out_byte = 8'h07;
  225.             8'hC6: out_byte = 8'hC7;
  226.             8'hC7: out_byte = 8'h31;
  227.             8'hC8: out_byte = 8'hB1;
  228.             8'hC9: out_byte = 8'h12;
  229.             8'hCA: out_byte = 8'h10;
  230.             8'hCB: out_byte = 8'h59;
  231.             8'hCC: out_byte = 8'h27;
  232.             8'hCD: out_byte = 8'h80;
  233.             8'hCE: out_byte = 8'hEC;
  234.             8'hCF: out_byte = 8'h5F;
  235.             8'hD0: out_byte = 8'h60;
  236.             8'hD1: out_byte = 8'h51;
  237.             8'hD2: out_byte = 8'h7F;
  238.             8'hD3: out_byte = 8'hA9;
  239.             8'hD4: out_byte = 8'h19;
  240.             8'hD5: out_byte = 8'hB5;
  241.             8'hD6: out_byte = 8'h4A;
  242.             8'hD7: out_byte = 8'h0D;
  243.             8'hD8: out_byte = 8'h2D;
  244.             8'hD9: out_byte = 8'hE5;
  245.             8'hDA: out_byte = 8'h7A;
  246.             8'hDB: out_byte = 8'h9F;
  247.             8'hDC: out_byte = 8'h93;
  248.             8'hDD: out_byte = 8'hC9;
  249.             8'hDE: out_byte = 8'h9C;
  250.             8'hDF: out_byte = 8'hEF;
  251.             8'hE0: out_byte = 8'hA0;
  252.             8'hE1: out_byte = 8'hE0;
  253.             8'hE2: out_byte = 8'h3B;
  254.             8'hE3: out_byte = 8'h4D;
  255.             8'hE4: out_byte = 8'hAE;
  256.             8'hE5: out_byte = 8'h2A;
  257.             8'hE6: out_byte = 8'hF5;
  258.             8'hE7: out_byte = 8'hB0;
  259.             8'hE8: out_byte = 8'hC8;
  260.             8'hE9: out_byte = 8'hEB;
  261.             8'hEA: out_byte = 8'hBB;
  262.             8'hEB: out_byte = 8'h3C;
  263.             8'hEC: out_byte = 8'h83;
  264.             8'hED: out_byte = 8'h53;
  265.             8'hEE: out_byte = 8'h99;
  266.             8'hEF: out_byte = 8'h61;
  267.             8'hF0: out_byte = 8'h17;
  268.             8'hF1: out_byte = 8'h2B;
  269.             8'hF2: out_byte = 8'h04;
  270.             8'hF3: out_byte = 8'h7E;
  271.             8'hF4: out_byte = 8'hBA;
  272.             8'hF5: out_byte = 8'h77;
  273.             8'hF6: out_byte = 8'hD6;
  274.             8'hF7: out_byte = 8'h26;
  275.             8'hF8: out_byte = 8'hE1;
  276.             8'hF9: out_byte = 8'h69;
  277.             8'hFA: out_byte = 8'h14;
  278.             8'hFB: out_byte = 8'h63;
  279.             8'hFC: out_byte = 8'h55;
  280.             8'hFD: out_byte = 8'h21;
  281.             8'hFE: out_byte = 8'h0C;
  282.             8'hFF: out_byte = 8'h7D;
  283.             default: out_byte = 8'h00;
  284.         endcase
  285.     end
  286. endmodule

10.逆行移位模块

  1. module inv_shift_rows(
  2.     input [127:0] in_state, // 输入状态矩阵，每行32位，总共4行
  3.     output reg [127:0] out_state // 输出状态矩阵
  4. );
  5.  
  6.     // 定义每一列的信号，从上而下，从左到右
  7.     reg [31:0] col0, col1, col2, col3;
  8.  
  9.     // 从输入状态中提取每一列的每个字节
  10.     always @(*) begin
  11.         col0 = in_state[31:0];
  12.         col1 = in_state[63:32];
  13.         col2 = in_state[95:64];
  14.         col3 = in_state[127:96];
  15.     end
  16.  
  17.     // 行移位操作
  18.     always @(*) begin
  19.         out_state[7:0]      = col0[7:0];
  20.         out_state[15:8]     = col3[15:8];
  21.         out_state[23:16]    = col2[23:16];
  22.         out_state[31:24]    = col1[31:24];
  23.  
  24.         out_state[39:32] = col1[7:0];
  25.         out_state[47:40] = col0[15:8];
  26.         out_state[55:48] = col3[23:16];
  27.         out_state[63:56] = col2[31:24];
  28.  
  29.         out_state[71:64] = col2[7:0];
  30.         out_state[79:72] = col1[15:8];
  31.         out_state[87:80] = col0[23:16];
  32.         out_state[95:88] = col3[31:24];
  33.  
  34.         out_state[103:96]  = col3[7:0];
  35.         out_state[111:104] = col2[15:8];
  36.         out_state[119:112] = col1[23:16];
  37.         out_state[127:120] = col0[31:24];
  38.     end
  39.  
  40. endmodule

11.密钥拓展模块

  1. module key_exp(
  2.     input clk,
  3.     input rst,
  4.     input [5:0]state,
  5.     input [127:0] key, // 输入的128位主密钥
  6.     output [128*11-1:0] round_key  // 输出的轮密钥数组，共11个轮密钥
  7. );
  8. // 定义局部参数
  9. localparam rcon0 = 32'h01000000;
  10. localparam rcon1 = 32'h02000000;
  11. localparam rcon2 = 32'h04000000;
  12. localparam rcon3 = 32'h08000000;
  13. localparam rcon4 = 32'h10000000;
  14. localparam rcon5 = 32'h20000000;
  15. localparam rcon6 = 32'h40000000;
  16. localparam rcon7 = 32'h80000000; 
  17. localparam rcon8 = 32'h1b000000;
  18. localparam rcon9 = 32'h36000000;
  19. wire [31:0]subword;
  20. wire [31:0]tmp_w;
  21. reg [127:0] round_keys [0:10];// 输出的轮密钥数组，共11个轮密钥
  22. reg [31:0] w[0:3]; // 用于临时存储中间结果的寄存器数组
  23. // 初始化轮密钥数组的前4个轮密钥为主密钥的前4个字
  24. always @(posedge clk or negedge rst)begin
  25.     if (!rst) begin
  26.         w[0]=32'b0;
  27.     end
  28.     else begin
  29.         case (state)
  30.             0: w[0] <= key[127:96]; // 根据 state 选择不同的 rcon 值
  31.             1: w[0] <= w[0] ^ subword ^ rcon0;
  32.             2: w[0] <= w[0] ^ subword ^ rcon1;
  33.             3: w[0] <= w[0] ^ subword ^ rcon2;
  34.             4: w[0] <= w[0] ^ subword ^ rcon3;
  35.             5: w[0] <= w[0] ^ subword ^ rcon4;
  36.             6: w[0] <= w[0] ^ subword ^ rcon5;
  37.             7: w[0] <= w[0] ^ subword ^ rcon6;
  38.             8: w[0] <= w[0] ^ subword ^ rcon7;
  39.             9: w[0] <= w[0] ^ subword ^ rcon8;
  40.             10: w[0] <= w[0] ^ subword ^ rcon9;
  41.             default: w[0] <= 32'b0; // 默认情况下设置为 0
  42.         endcase
  43.     end
  44. end
  45. always @(posedge clk or negedge rst)begin
  46.     if (!rst) begin
  47.         w[1]=32'b0;
  48.     end
  49.     else begin
  50.         case (state)
  51.             0: w[1] <= key[95:64]; // 根据 state 选择不同的 rcon 值
  52.             1: w[1] <= w[0]^w[1]^subword^rcon0;
  53.             2: w[1] <= w[0]^w[1]^subword^rcon1;
  54.             3: w[1] <= w[0]^w[1]^subword^rcon2;
  55.             4: w[1] <= w[0]^w[1]^subword^rcon3;
  56.             5: w[1] <= w[0]^w[1]^subword^rcon4;
  57.             6: w[1] <= w[0]^w[1]^subword^rcon5;
  58.             7: w[1] <= w[0]^w[1]^subword^rcon6;
  59.             8: w[1] <= w[0]^w[1]^subword^rcon7;
  60.             9: w[1] <= w[0]^w[1]^subword^rcon8;
  61.             10: w[1] <= w[0]^w[1]^subword^rcon9;
  62.             default: w[1] <= 32'b0; // 默认情况下设置为 0
  63.         endcase
  64.     end
  65. end
  66. always @(posedge clk or negedge rst)begin
  67.     if (!rst) begin
  68.         w[2]=32'b0;
  69.     end
  70.     else begin
  71.         case (state)
  72.             0: w[2] <= key[63:32]; // 根据 state 选择不同的 rcon 值
  73.             1: w[2] <= w[2]^w[0]^w[1]^subword^rcon0;
  74.             2: w[2] <= w[2]^w[0]^w[1]^subword^rcon1;
  75.             3: w[2] <= w[2]^w[0]^w[1]^subword^rcon2;
  76.             4: w[2] <= w[2]^w[0]^w[1]^subword^rcon3;
  77.             5: w[2] <= w[2]^w[0]^w[1]^subword^rcon4;
  78.             6: w[2] <= w[2]^w[0]^w[1]^subword^rcon5;
  79.             7: w[2] <= w[2]^w[0]^w[1]^subword^rcon6;
  80.             8: w[2] <= w[2]^w[0]^w[1]^subword^rcon7;
  81.             9: w[2] <= w[2]^w[0]^w[1]^subword^rcon8;
  82.             10: w[2] <= w[2]^w[0]^w[1]^subword^rcon9;
  83.             default: w[2] <= 32'b0; // 默认情况下设置为 0
  84.         endcase
  85.     end
  86. end
  87. always @(posedge clk or negedge rst)begin
  88.     if (!rst) begin
  89.         w[3]=32'b0;
  90.     end
  91.     else begin
  92.         case (state)
  93.             0: w[3] <= key[31:0]; // 根据 state 选择不同的 rcon 值
  94.             1: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon0;
  95.             2: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon1;
  96.             3: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon2;
  97.             4: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon3;
  98.             5: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon4;
  99.             6: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon5;
  100.             7: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon6;
  101.             8: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon7;
  102.             9: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon8;
  103.             10: w[3] <= w[3]^w[2]^w[0]^w[1]^subword^rcon9;
  104.             default: w[3] <= 32'b0; // 默认情况下设置为 0
  105.         endcase
  106.     end
  107. end
  108. assign tmp_w = w[3];
  109. s_box u0(.in_byte(tmp_w[23:16]), .out_byte(subword[31:24]));
  110.  
  111. s_box u1(.in_byte(tmp_w[15:08]), .out_byte(subword[23:16]));
  112.  
  113. s_box u2(.in_byte(tmp_w[07:00]), .out_byte(subword[15:08]));
  114.  
  115. s_box u3(.in_byte(tmp_w[31:24]), .out_byte(subword[07:00]));
  116. always @(posedge clk or negedge rst) begin
  117.     if (!rst) begin
  118.         round_keys[0]=128'b0;
  119.         round_keys[1]=128'b0;
  120.         round_keys[2]=128'b0;
  121.         round_keys[3]=128'b0;
  122.         round_keys[4]=128'b0;
  123.         round_keys[5]=128'b0;
  124.         round_keys[6]=128'b0;
  125.         round_keys[7]=128'b0;
  126.         round_keys[8]=128'b0;
  127.         round_keys[9]=128'b0;
  128.         round_keys[10]=128'b0;
  129.     end
  130.     else begin
  131.         case (state)
  132.             1: round_keys[0] <= {w[0],w[1],w[2],w[3]};
  133.             2: round_keys[1] <= {w[0],w[1],w[2],w[3]};
  134.             3: round_keys[2] <= {w[0],w[1],w[2],w[3]};
  135.             4: round_keys[3] <= {w[0],w[1],w[2],w[3]};
  136.             5: round_keys[4] <= {w[0],w[1],w[2],w[3]};
  137.             6: round_keys[5] <= {w[0],w[1],w[2],w[3]};
  138.             7: round_keys[6] <= {w[0],w[1],w[2],w[3]};
  139.             8: round_keys[7] <= {w[0],w[1],w[2],w[3]};
  140.             9: round_keys[8] <= {w[0],w[1],w[2],w[3]};
  141.             10: round_keys[9]  <= {w[0],w[1],w[2],w[3]};
  142.             11: round_keys[10]  <= {w[0],w[1],w[2],w[3]};
  143.         endcase
  144.     end
  145. end
  146.     assign round_key={round_keys[10],round_keys[9],round_keys[8],round_keys[7],round_keys[6],round_keys[5],round_keys[4],round_keys[3],round_keys[2],round_keys[1],round_keys[0]};
  147. endmodule

12.列混合模块

  1. module mix_col(
  2.     input [7:0] s0, s1, s2, s3,
  3.     output reg [7:0] mix_col_0,
  4.     output reg [7:0] mix_col_1,
  5.     output reg [7:0] mix_col_2,
  6.     output reg [7:0] mix_col_3
  7. );
  8. //logic: decryption mixcolumns
  9.  
  10.     always @(s0,s1,s2,s3)begin
  11.         mix_col_0=pmul_2(s0)^pmul_3(s1)^pmul_1(s2)^pmul_1(s3);
  12.         mix_col_1=pmul_1(s0)^pmul_2(s1)^pmul_3(s2)^pmul_1(s3);
  13.         mix_col_2=pmul_1(s0)^pmul_1(s1)^pmul_2(s2)^pmul_3(s3);
  14.         mix_col_3=pmul_3(s0)^pmul_1(s1)^pmul_1(s2)^pmul_2(s3);
  15.     end
  16. //function
  17.     function [7:0] pmul_1;
  18.         input [7:0] b;
  19.         begin
  20.             pmul_1=b;
  21.         end
  22.     endfunction
  23.  
  24. function [7:0] pmul_3;
  25.     input [7:0] b;
  26.     reg [7:0] two;
  27.     begin
  28.         two=pmul_2(b);
  29.         pmul_3=two^b;
  30.     end
  31. endfunction
  32.  
  33. function [7:0] pmul_2;
  34.  
  35.     input [7:0] b;
  36.  
  37.     pmul_2={b[6:0],1'b0}^(8'h1b&{8{b[7]}});
  38. endfunction
  39.  
  40. endmodule

13.s盒子模块

  1. module s_box(
  2.     input [7:0] in_byte,
  3.     output reg [7:0] out_byte
  4. );
  5.  
  6. // 256x8 S-box lookup table
  7. /*reg [7:0] s_box [0:255] = {
  8.     8'h63, 8'h7c, 8'h77, 8'h7b, 8'hf2, 8'h6b, 8'h6f, 8'hc5,
  9.     8'h30, 8'h01, 8'h67, 8'h2b, 8'hfe, 8'hd7, 8'hab, 8'h76,
  10.     8'hca, 8'h82, 8'hc9, 8'h7d, 8'hfa, 8'h59, 8'h47, 8'hf0,
  11.     8'had, 8'hd4, 8'ha2, 8'haf, 8'h9c, 8'ha4, 8'h72, 8'hc0,
  12.     8'hb7, 8'hfd, 8'h93, 8'h26, 8'h36, 8'h3f, 8'hf7, 8'hcc,
  13.     8'h34, 8'ha5, 8'he5, 8'hf1, 8'h71, 8'hd8, 8'h31, 8'h15,
  14.     8'h04, 8'hc7, 8'h23, 8'hc3, 8'h18, 8'h96, 8'h05, 8'h9a,
  15.     8'h07, 8'h12, 8'h80, 8'he2, 8'heb, 8'h27, 8'hb2, 8'h75,
  16.     8'h09, 8'h83, 8'h2c, 8'h1a, 8'h1b, 8'h6e, 8'h5a, 8'ha0,
  17.     8'h52, 8'h3b, 8'hd6, 8'hb3, 8'h29, 8'he3, 8'h2f, 8'h84,
  18.     8'h53, 8'hd1, 8'h00, 8'hed, 8'h20, 8'hfc, 8'hb1, 8'h5b,
  19.     8'h6a, 8'hcb, 8'hbe, 8'h39, 8'h4a, 8'h4c, 8'h58, 8'hcf,
  20.     8'hd0, 8'hef, 8'haa, 8'hfb, 8'h43, 8'h4d, 8'h33, 8'h85,
  21.     8'h45, 8'hf9, 8'h02, 8'h7f, 8'h50, 8'h3c, 8'h9f, 8'ha8,
  22.     8'h51, 8'ha3, 8'h40, 8'h8f, 8'h92, 8'h9d, 8'h38, 8'hf5,
  23.     8'hbc, 8'hb6, 8'hda, 8'h21, 8'h10, 8'hff, 8'hf3, 8'hd2,
  24.     8'hcd, 8'h0c, 8'h13, 8'hec, 8'h5f, 8'h97, 8'h44, 8'h17,
  25.     8'hc4, 8'ha7, 8'h7e, 8'h3d, 8'h64, 8'h5d, 8'h19, 8'h73,
  26.     8'h60, 8'h81, 8'h4f, 8'hdc, 8'h22, 8'h2a, 8'h90, 8'h88,
  27.     8'h46, 8'hee, 8'hb8, 8'h14, 8'hde, 8'h5e, 8'h0b, 8'hdb,
  28.     8'he0, 8'h32, 8'h3a, 8'h0a, 8'h49, 8'h06, 8'h24, 8'h5c,
  29.     8'hc2, 8'hd3, 8'hac, 8'h62, 8'h91, 8'h95, 8'he4, 8'h79,
  30.     8'he7, 8'hc8, 8'h37, 8'h6d, 8'h8d, 8'hd5, 8'h4e, 8'ha9,
  31.     8'h6c, 8'h56, 8'hf4, 8'hea, 8'h65, 8'h7a, 8'hae, 8'h08,
  32.     8'hba, 8'h78, 8'h25, 8'h2e, 8'h1c, 8'ha6, 8'hb4, 8'hc6,
  33.     8'he8, 8'hdd, 8'h74, 8'h1f, 8'h4b, 8'hbd, 8'h8b, 8'h8a,
  34.     8'h70, 8'h3e, 8'hb5, 8'h66, 8'h48, 8'h03, 8'hf6, 8'h0e,
  35.     8'h61, 8'h35, 8'h57, 8'hb9, 8'h86, 8'hc1, 8'h1d, 8'h9e,
  36.     8'he1, 8'hf8, 8'h98, 8'h11, 8'h69, 8'hd9, 8'h8e, 8'h94,
  37.     8'h9b, 8'h1e, 8'h87, 8'he9, 8'hce, 8'h55, 8'h28, 8'hdf,
  38.     8'h8c, 8'ha1, 8'h89, 8'h0d, 8'hbf, 8'he6, 8'h42, 8'h68,
  39.     8'h41, 8'h99, 8'h2d, 8'h0f, 8'hb0, 8'h54, 8'hbb, 8'h16
  40. };*/
  41.     always @(in_byte) begin
  42.         case (in_byte)
  43.             8'h00: out_byte = 8'h63;
  44.             8'h01: out_byte = 8'h7C;
  45.             8'h02: out_byte = 8'h77;
  46.             8'h03: out_byte = 8'h7B;
  47.             8'h04: out_byte = 8'hF2;
  48.             8'h05: out_byte = 8'h6B;
  49.             8'h06: out_byte = 8'h6F;
  50.             8'h07: out_byte = 8'hC5;
  51.             8'h08: out_byte = 8'h30;
  52.             8'h09: out_byte = 8'h01;
  53.             8'h0A: out_byte = 8'h67;
  54.             8'h0B: out_byte = 8'h2B;
  55.             8'h0C: out_byte = 8'hFE;
  56.             8'h0D: out_byte = 8'hD7;
  57.             8'h0E: out_byte = 8'hAB;
  58.             8'h0F: out_byte = 8'h76;
  59.             8'h10: out_byte = 8'hCA;
  60.             8'h11: out_byte = 8'h82;
  61.             8'h12: out_byte = 8'hC9;
  62.             8'h13: out_byte = 8'h7D;
  63.             8'h14: out_byte = 8'hFA;
  64.             8'h15: out_byte = 8'h59;
  65.             8'h16: out_byte = 8'h47;
  66.             8'h17: out_byte = 8'hF0;
  67.             8'h18: out_byte = 8'hAD;
  68.             8'h19: out_byte = 8'hD4;
  69.             8'h1A: out_byte = 8'hA2;
  70.             8'h1B: out_byte = 8'hAF;
  71.             8'h1C: out_byte = 8'h9C;
  72.             8'h1D: out_byte = 8'hA4;
  73.             8'h1E: out_byte = 8'h72;
  74.             8'h1F: out_byte = 8'hC0;
  75.             8'h20: out_byte = 8'hB7;
  76.             8'h21: out_byte = 8'hFD;
  77.             8'h22: out_byte = 8'h93;
  78.             8'h23: out_byte = 8'h26;
  79.             8'h24: out_byte = 8'h36;
  80.             8'h25: out_byte = 8'h3F;
  81.             8'h26: out_byte = 8'hF7;
  82.             8'h27: out_byte = 8'hCC;
  83.             8'h28: out_byte = 8'h34;
  84.             8'h29: out_byte = 8'hA5;
  85.             8'h2A: out_byte = 8'hE5;
  86.             8'h2B: out_byte = 8'hF1;
  87.             8'h2C: out_byte = 8'h71;
  88.             8'h2D: out_byte = 8'hD8;
  89.             8'h2E: out_byte = 8'h31;
  90.             8'h2F: out_byte = 8'h15;
  91.             8'h30: out_byte = 8'h04;
  92.             8'h31: out_byte = 8'hC7;
  93.             8'h32: out_byte = 8'h23;
  94.             8'h33: out_byte = 8'hC3;
  95.             8'h34: out_byte = 8'h18;
  96.             8'h35: out_byte = 8'h96;
  97.             8'h36: out_byte = 8'h05;
  98.             8'h37: out_byte = 8'h9A;
  99.             8'h38: out_byte = 8'h07;
  100.             8'h39: out_byte = 8'h12;
  101.             8'h3A: out_byte = 8'h80;
  102.             8'h3B: out_byte = 8'hE2;
  103.             8'h3C: out_byte = 8'hEB;
  104.             8'h3D: out_byte = 8'h27;
  105.             8'h3E: out_byte = 8'hB2;
  106.             8'h3F: out_byte = 8'h75;
  107.             8'h40: out_byte = 8'h09;
  108.             8'h41: out_byte = 8'h83;
  109.             8'h42: out_byte = 8'h2C;
  110.             8'h43: out_byte = 8'h1A;
  111.             8'h44: out_byte = 8'h1B;
  112.             8'h45: out_byte = 8'h6E;
  113.             8'h46: out_byte = 8'h5A;
  114.             8'h47: out_byte = 8'hA0;
  115.             8'h48: out_byte = 8'h52;
  116.             8'h49: out_byte = 8'h3B;
  117.             8'h4A: out_byte = 8'hD6;
  118.             8'h4B: out_byte = 8'hB3;
  119.             8'h4C: out_byte = 8'h29;
  120.             8'h4D: out_byte = 8'hE3;
  121.             8'h4E: out_byte = 8'h2F;
  122.             8'h4F: out_byte = 8'h84;
  123.             8'h50: out_byte = 8'h53;
  124.             8'h51: out_byte = 8'hD1;
  125.             8'h52: out_byte = 8'h00;
  126.             8'h53: out_byte = 8'hED;
  127.             8'h54: out_byte = 8'h20;
  128.             8'h55: out_byte = 8'hFC;
  129.             8'h56: out_byte = 8'hB1;
  130.             8'h57: out_byte = 8'h5B;
  131.             8'h58: out_byte = 8'h6A;
  132.             8'h59: out_byte = 8'hCB;
  133.             8'h5A: out_byte = 8'hBE;
  134.             8'h5B: out_byte = 8'h39;
  135.             8'h5C: out_byte = 8'h4A;
  136.             8'h5D: out_byte = 8'h4C;
  137.             8'h5E: out_byte = 8'h58;
  138.             8'h5F: out_byte = 8'hCF;
  139.             8'h60: out_byte = 8'hD0;
  140.             8'h61: out_byte = 8'hEF;
  141.             8'h62: out_byte = 8'hAA;
  142.             8'h63: out_byte = 8'hFB;
  143.             8'h64: out_byte = 8'h43;
  144.             8'h65: out_byte = 8'h4D;
  145.             8'h66: out_byte = 8'h33;
  146.             8'h67: out_byte = 8'h85;
  147.             8'h68: out_byte = 8'h45;
  148.             8'h69: out_byte = 8'hF9;
  149.             8'h6A: out_byte = 8'h02;
  150.             8'h6B: out_byte = 8'h7F;
  151.             8'h6C: out_byte = 8'h50;
  152.             8'h6D: out_byte = 8'h3C;
  153.             8'h6E: out_byte = 8'h9F;
  154.             8'h6F: out_byte = 8'hA8;
  155.             8'h70: out_byte = 8'h51;
  156.             8'h71: out_byte = 8'hA3;
  157.             8'h72: out_byte = 8'h40;
  158.             8'h73: out_byte = 8'h8F;
  159.             8'h74: out_byte = 8'h92;
  160.             8'h75: out_byte = 8'h9D;
  161.             8'h76: out_byte = 8'h38;
  162.             8'h77: out_byte = 8'hF5;
  163.             8'h78: out_byte = 8'hBC;
  164.             8'h79: out_byte = 8'hB6;
  165.             8'h7A: out_byte = 8'hDA;
  166.             8'h7B: out_byte = 8'h21;
  167.             8'h7C: out_byte = 8'h10;
  168.             8'h7D: out_byte = 8'hFF;
  169.             8'h7E: out_byte = 8'hF3;
  170.             8'h7F: out_byte = 8'hD2;
  171.             8'h80: out_byte = 8'hCD;
  172.             8'h81: out_byte = 8'h0C;
  173.             8'h82: out_byte = 8'h13;
  174.             8'h83: out_byte = 8'hEC;
  175.             8'h84: out_byte = 8'h5F;
  176.             8'h85: out_byte = 8'h97;
  177.             8'h86: out_byte = 8'h44;
  178.             8'h87: out_byte = 8'h17;
  179.             8'h88: out_byte = 8'hC4;
  180.             8'h89: out_byte = 8'hA7;
  181.             8'h8A: out_byte = 8'h7E;
  182.             8'h8B: out_byte = 8'h3D;
  183.             8'h8C: out_byte = 8'h64;
  184.             8'h8D: out_byte = 8'h5D;
  185.             8'h8E: out_byte = 8'h19;
  186.             8'h8F: out_byte = 8'h73;
  187.             8'h90: out_byte = 8'h60;
  188.             8'h91: out_byte = 8'h81;
  189.             8'h92: out_byte = 8'h4F;
  190.             8'h93: out_byte = 8'hDC;
  191.             8'h94: out_byte = 8'h22;
  192.             8'h95: out_byte = 8'h2A;
  193.             8'h96: out_byte = 8'h90;
  194.             8'h97: out_byte = 8'h88;
  195.             8'h98: out_byte = 8'h46;
  196.             8'h99: out_byte = 8'hEE;
  197.             8'h9A: out_byte = 8'hB8;
  198.             8'h9B: out_byte = 8'h14;
  199.             8'h9C: out_byte = 8'hDE;
  200.             8'h9D: out_byte = 8'h5E;
  201.             8'h9E: out_byte = 8'h0B;
  202.             8'h9F: out_byte = 8'hDB;
  203.             8'hA0: out_byte = 8'hE0;
  204.             8'hA1: out_byte = 8'h32;
  205.             8'hA2: out_byte = 8'h3A;
  206.             8'hA3: out_byte = 8'h0A;
  207.             8'hA4: out_byte = 8'h49;
  208.             8'hA5: out_byte = 8'h06;
  209.             8'hA6: out_byte = 8'h24;
  210.             8'hA7: out_byte = 8'h5C;
  211.             8'hA8: out_byte = 8'hC2;
  212.             8'hA9: out_byte = 8'hD3;
  213.             8'hAA: out_byte = 8'hAC;
  214.             8'hAB: out_byte = 8'h62;
  215.             8'hAC: out_byte = 8'h91;
  216.             8'hAD: out_byte = 8'h95;
  217.             8'hAE: out_byte = 8'hE4;
  218.             8'hAF: out_byte = 8'h79;
  219.             8'hB0: out_byte = 8'hE7;
  220.             8'hB1: out_byte = 8'hC8;
  221.             8'hB2: out_byte = 8'h37;
  222.             8'hB3: out_byte = 8'h6D;
  223.             8'hB4: out_byte = 8'h8D;
  224.             8'hB5: out_byte = 8'hD5;
  225.             8'hB6: out_byte = 8'h4E;
  226.             8'hB7: out_byte = 8'hA9;
  227.             8'hB8: out_byte = 8'h6C;
  228.             8'hB9: out_byte = 8'h56;
  229.             8'hBA: out_byte = 8'hF4;
  230.             8'hBB: out_byte = 8'hEA;
  231.             8'hBC: out_byte = 8'h65;
  232.             8'hBD: out_byte = 8'h7A;
  233.             8'hBE: out_byte = 8'hAE;
  234.             8'hBF: out_byte = 8'h08;
  235.             8'hC0: out_byte = 8'hBA;
  236.             8'hC1: out_byte = 8'h78;
  237.             8'hC2: out_byte = 8'h25;
  238.             8'hC3: out_byte = 8'h2E;
  239.             8'hC4: out_byte = 8'h1C;
  240.             8'hC5: out_byte = 8'hA6;
  241.             8'hC6: out_byte = 8'hB4;
  242.             8'hC7: out_byte = 8'hC6;
  243.             8'hC8: out_byte = 8'hE8;
  244.             8'hC9: out_byte = 8'hDD;
  245.             8'hCA: out_byte = 8'h74;
  246.             8'hCB: out_byte = 8'h1F;
  247.             8'hCC: out_byte = 8'h4B;
  248.             8'hCD: out_byte = 8'hBD;
  249.             8'hCE: out_byte = 8'h8B;
  250.             8'hCF: out_byte = 8'h8A;
  251.             8'hD0: out_byte = 8'h70;
  252.             8'hD1: out_byte = 8'h3E;
  253.             8'hD2: out_byte = 8'hB5;
  254.             8'hD3: out_byte = 8'h66;
  255.             8'hD4: out_byte = 8'h48;
  256.             8'hD5: out_byte = 8'h03;
  257.             8'hD6: out_byte = 8'hF6;
  258.             8'hD7: out_byte = 8'h0E;
  259.             8'hD8: out_byte = 8'h61;
  260.             8'hD9: out_byte = 8'h35;
  261.             8'hDA: out_byte = 8'h57;
  262.             8'hDB: out_byte = 8'hB9;
  263.             8'hDC: out_byte = 8'h86;
  264.             8'hDD: out_byte = 8'hC1;
  265.             8'hDE: out_byte = 8'h1D;
  266.             8'hDF: out_byte = 8'h9E;
  267.             8'hE0: out_byte = 8'hE1;
  268.             8'hE1: out_byte = 8'hF8;
  269.             8'hE2: out_byte = 8'h98;
  270.             8'hE3: out_byte = 8'h11;
  271.             8'hE4: out_byte = 8'h69;
  272.             8'hE5: out_byte = 8'hD9;
  273.             8'hE6: out_byte = 8'h8E;
  274.             8'hE7: out_byte = 8'h94;
  275.             8'hE8: out_byte = 8'h9B;
  276.             8'hE9: out_byte = 8'h1E;
  277.             8'hEA: out_byte = 8'h87;
  278.             8'hEB: out_byte = 8'hE9;
  279.             8'hEC: out_byte = 8'hCE;
  280.             8'hED: out_byte = 8'h55;
  281.             8'hEE: out_byte = 8'h28;
  282.             8'hEF: out_byte = 8'hDF;
  283.             8'hF0: out_byte = 8'h8C;
  284.             8'hF1: out_byte = 8'hA1;
  285.             8'hF2: out_byte = 8'h89;
  286.             8'hF3: out_byte = 8'h0D;
  287.             8'hF4: out_byte = 8'hBF;
  288.             8'hF5: out_byte = 8'hE6;
  289.             8'hF6: out_byte = 8'h42;
  290.             8'hF7: out_byte = 8'h68;
  291.             8'hF8: out_byte = 8'h41;
  292.             8'hF9: out_byte = 8'h99;
  293.             8'hFA: out_byte = 8'h2D;
  294.             8'hFB: out_byte = 8'h0F;
  295.             8'hFC: out_byte = 8'hB0;
  296.             8'hFD: out_byte = 8'h54;
  297.             8'hFE: out_byte = 8'hBB;
  298.             8'hFF: out_byte = 8'h16;
  299.             default: out_byte = 8'h00;
  300.         endcase
  301.     end
  302. endmodule

14.行移位模块

  1. module shift_rows(
  2.     input [127:0] in_state, // 输入状态矩阵，每行32位，总共4行
  3.     output reg [127:0] out_state // 输出状态矩阵
  4. );
  5.  
  6.     // 定义每一列的信号，从上而下，从左到右
  7.     reg [31:0] col0, col1, col2, col3;
  8.  
  9.     // 从输入状态中提取每一列的每个字节
  10.     always @(*) begin
  11.         col0 = in_state[31:0];
  12.         col1 = in_state[63:32];
  13.         col2 = in_state[95:64];
  14.         col3 = in_state[127:96];
  15.     end
  16.  
  17.     // 行移位操作
  18.     always @(*) begin
  19.         out_state[7:0]      = col0[7:0];
  20.         out_state[15:8]     = col1[15:8];
  21.         out_state[23:16]    = col2[23:16];
  22.         out_state[31:24]    = col3[31:24];
  23.  
  24.         out_state[39:32] = col1[7:0];
  25.         out_state[47:40] = col2[15:8];
  26.         out_state[55:48] = col3[23:16];
  27.         out_state[63:56] = col0[31:24];
  28.  
  29.         out_state[71:64] = col2[7:0];
  30.         out_state[79:72] = col3[15:8];
  31.         out_state[87:80] = col0[23:16];
  32.         out_state[95:88] = col1[31:24];
  33.  
  34.         out_state[103:96]  = col3[7:0];
  35.         out_state[111:104] = col0[15:8];
  36.         out_state[119:112] = col1[23:16];
  37.         out_state[127:120] = col2[31:24];
  38.     end
  39.  
  40. endmodule

15.testbench

  1. module testbench;
  2.   reg clk;                 // 时钟信号
  3.   reg rst;                 // 复位信号
  4.  
  5.   // 被测试的模块实例化
  6.   aes_top aes_top_inst (
  7.     .clk(clk),
  8.     .rst(rst)
  9.   );
  10.  
  11.   // 时钟生成
  12.   always begin
  13.     #5 clk = ~clk; // 周期为 10 个时间单位
  14.   end
  15.  
  16.   // 模块输入数据生成
  17.   initial begin
  18.     clk = 0;
  19.     rst = 1;
  20.     // 等待一些时间来确保模块初始化完成
  21.     #20;
  22.     // 使能复位
  23.     rst = 0;
  24.  
  25.     // 在时钟上升沿之前等待一些时间
  26.     #20;
  27.  
  28.     // 停止复位
  29.     rst = 1;
  30.   end
  31.  
  32. endmodule
结果：先加密，后解密，得到的plaintext_1 和原来的 plaintext是一样的，说明这个算法是有效的。
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