高级加密标准（Advanced Encryption Standard）是在2001年赢得美国国家标准技术研究院（NIST）的标准化加密算法搜索的算法。2002年，它被美国政府采纳为加密标准。 它基于Rijndael算法。

即使它是由NIST选择的，也不是可用的最强大的算法。 Twofish和Serpent算法都提供了更高的安全性。 选择AES是因为它在硬件或软件中实现时速度很快。

什么是AES？

AES是一种分组密码。 这意味着它一次加密一组字节。 在这种情况下，一次为16个字节。 通常，分组密码比流密码更安全，因为它们混淆了原始字节的位置。

这是一个秘密密钥算法，这意味着它使用的密钥仅应由预期的发送者和接收者知道。 一个主要的问题是密钥的安全传输。 公钥密码学通过使用所谓的“硬”数学解决了这一问题，其中在一个方向上的计算很容易，而在相反方向上的求解则需要更长的时间。 一个例子是乘法与因式分解。 将两个数字相乘很容易，但是尝试找到用于获取该数字的两个数字会花费很长时间。 这种类型的“硬”数学使您可以传输发件人和收件人用来计算密钥的公共信息，而不必传输密钥。 那么为什么不只使用公钥加密呢？ 它比秘密密钥加密要慢得多。

密码学的一般缺陷

密码学的一个弱点是可以使用蛮力将其入侵。 这意味着，只有在计算机尝试查找每个密码直到找到您使用的密码之前，该消息才可以保密。 您添加到密码中的每个字节意味着破解密码大约需要256倍的时间。 所以问题是，您需要多长时间才能将该消息保密？

现在，这实际上并不是该算法的弱点。 一个实际的弱点是，许多算法都经过数学分析，可能会揭示出用于加密数据的密钥。 如果使用相同或相似的密钥提供足够的加密数据，将比使用蛮力更快地导致破解。 减轻这种情况的一种方法是使用随机数，初始化向量或盐。 它们基本上是与密钥一起使用的随机位，因此，即使您使用的是相同的密钥，每个消息也不相同，因为实际上随机位会更改所使用的密钥。

这就是为什么您应该选择更长的密码以及为什么应该经常更改密码的原因。

AES如何工作

AES一次编码16个字节的数据，并根据其算法运行指定的轮数，具体取决于所需的强度位。 AES可以使用128位，194位或256位。 下面的示例实现是256位版本。

它首先通过使用Rijndael密钥调度程序算法扩展原始密钥来创建圆形密钥。 然后，通过使用Rijndael S-box替换字节，移位字节，使用Galois字段扩散字节并添加回合密钥来加密该块。 在256位版本中，此操作执行14次。 它对每个16字节的数据块执行此操作。

AES的特定弱点

当前，最著名的针对AES的攻击是相关密钥攻击。 当您拥有使用相似密钥编码的密文时，即当您使用密码“ Password1”对文本进行编码，然后使用密码“ Password2”对文本进行编码时，就会发生相关密钥攻击。 这是由于AES的简单密钥调度程序。 但是，这种攻击是不可行的，并且在使用256位版本的AES时将花费太多时间而无用。

AES的示例实现

此功能可在许多VB实现中使用。 它甚至可以在Visual Basic脚本中工作，并且实际上是专门为VBScript编码的。 但是它应该可以直接移植到VBA。 我根据美国国家标准技术研究院的测试文件验证了结果。 以下功能用于加密文件，但可以修改以接受其他数据。

此实现内联了许多使实现更易于阅读的功能。 这样做是为了提高速度。 它也以电子密码本模式（ECM）运行，这是最不安全的模式，但最容易理解和实施。 我将使用密码块链接模式（这是推荐的实现），并在完成后发布代码。

基本上，ECM不会对每个块进行编码，因此不会发生任何变化，因此，如果对同一块进行编码，则结果将相同。 CBC通过将生成的密文与下一个明文块进行异或来解决此问题。 因此，即使同一块被编码两次，结果也会有所不同。

Sub AES(sFile)Dim sbox, sboxinv, rconDim g2, g3, g9, g11, g13, g14 g2 = Array( _&h00,&h02,&h04,&h06,&h08,&h0a,&h0c,&h0e,&h10,&h12,&h14,&h16,&h18,&h1a,&h1c,&h1e, _&h20,&h22,&h24,&h26,&h28,&h2a,&h2c,&h2e,&h30,&h32,&h34,&h36,&h38,&h3a,&h3c,&h3e, _&h40,&h42,&h44,&h46,&h48,&h4a,&h4c,&h4e,&h50,&h52,&h54,&h56,&h58,&h5a,&h5c,&h5e, _&h60,&h62,&h64,&h66,&h68,&h6a,&h6c,&h6e,&h70,&h72,&h74,&h76,&h78,&h7a,&h7c,&h7e, _&h80,&h82,&h84,&h86,&h88,&h8a,&h8c,&h8e,&h90,&h92,&h94,&h96,&h98,&h9a,&h9c,&h9e, _&ha0,&ha2,&ha4,&ha6,&ha8,&haa,&hac,&hae,&hb0,&hb2,&hb4,&hb6,&hb8,&hba,&hbc,&hbe, _&hc0,&hc2,&hc4,&hc6,&hc8,&hca,&hcc,&hce,&hd0,&hd2,&hd4,&hd6,&hd8,&hda,&hdc,&hde, _&he0,&he2,&he4,&he6,&he8,&hea,&hec,&hee,&hf0,&hf2,&hf4,&hf6,&hf8,&hfa,&hfc,&hfe, _&h1b,&h19,&h1f,&h1d,&h13,&h11,&h17,&h15,&h0b,&h09,&h0f,&h0d,&h03,&h01,&h07,&h05, _&h3b,&h39,&h3f,&h3d,&h33,&h31,&h37,&h35,&h2b,&h29,&h2f,&h2d,&h23,&h21,&h27,&h25, _&h5b,&h59,&h5f,&h5d,&h53,&h51,&h57,&h55,&h4b,&h49,&h4f,&h4d,&h43,&h41,&h47,&h45, _&h7b,&h79,&h7f,&h7d,&h73,&h71,&h77,&h75,&h6b,&h69,&h6f,&h6d,&h63,&h61,&h67,&h65, _&h9b,&h99,&h9f,&h9d,&h93,&h91,&h97,&h95,&h8b,&h89,&h8f,&h8d,&h83,&h81,&h87,&h85, _&hbb,&hb9,&hbf,&hbd,&hb3,&hb1,&hb7,&hb5,&hab,&ha9,&haf,&had,&ha3,&ha1,&ha7,&ha5, _&hdb,&hd9,&hdf,&hdd,&hd3,&hd1,&hd7,&hd5,&hcb,&hc9,&hcf,&hcd,&hc3,&hc1,&hc7,&hc5, _&hfb,&hf9,&hff,&hfd,&hf3,&hf1,&hf7,&hf5,&heb,&he9,&hef,&hed,&he3,&he1,&he7,&he5) g3 = Array( _&h00,&h03,&h06,&h05,&h0c,&h0f,&h0a,&h09,&h18,&h1b,&h1e,&h1d,&h14,&h17,&h12,&h11, _&h30,&h33,&h36,&h35,&h3c,&h3f,&h3a,&h39,&h28,&h2b,&h2e,&h2d,&h24,&h27,&h22,&h21, _&h60,&h63,&h66,&h65,&h6c,&h6f,&h6a,&h69,&h78,&h7b,&h7e,&h7d,&h74,&h77,&h72,&h71, _&h50,&h53,&h56,&h55,&h5c,&h5f,&h5a,&h59,&h48,&h4b,&h4e,&h4d,&h44,&h47,&h42,&h41, _&hc0,&hc3,&hc6,&hc5,&hcc,&hcf,&hca,&hc9,&hd8,&hdb,&hde,&hdd,&hd4,&hd7,&hd2,&hd1, _&hf0,&hf3,&hf6,&hf5,&hfc,&hff,&hfa,&hf9,&he8,&heb,&hee,&hed,&he4,&he7,&he2,&he1, _&ha0,&ha3,&ha6,&ha5,&hac,&haf,&haa,&ha9,&hb8,&hbb,&hbe,&hbd,&hb4,&hb7,&hb2,&hb1, _&h90,&h93,&h96,&h95,&h9c,&h9f,&h9a,&h99,&h88,&h8b,&h8e,&h8d,&h84,&h87,&h82,&h81, _&h9b,&h98,&h9d,&h9e,&h97,&h94,&h91,&h92,&h83,&h80,&h85,&h86,&h8f,&h8c,&h89,&h8a, _&hab,&ha8,&had,&hae,&ha7,&ha4,&ha1,&ha2,&hb3,&hb0,&hb5,&hb6,&hbf,&hbc,&hb9,&hba, _&hfb,&hf8,&hfd,&hfe,&hf7,&hf4,&hf1,&hf2,&he3,&he0,&he5,&he6,&hef,&hec,&he9,&hea, _&hcb,&hc8,&hcd,&hce,&hc7,&hc4,&hc1,&hc2,&hd3,&hd0,&hd5,&hd6,&hdf,&hdc,&hd9,&hda, _&h5b,&h58,&h5d,&h5e,&h57,&h54,&h51,&h52,&h43,&h40,&h45,&h46,&h4f,&h4c,&h49,&h4a, _&h6b,&h68,&h6d,&h6e,&h67,&h64,&h61,&h62,&h73,&h70,&h75,&h76,&h7f,&h7c,&h79,&h7a, _&h3b,&h38,&h3d,&h3e,&h37,&h34,&h31,&h32,&h23,&h20,&h25,&h26,&h2f,&h2c,&h29,&h2a, _&h0b,&h08,&h0d,&h0e,&h07,&h04,&h01,&h02,&h13,&h10,&h15,&h16,&h1f,&h1c,&h19,&h1a) g9 = Array( _&h00,&h09,&h12,&h1b,&h24,&h2d,&h36,&h3f,&h48,&h41,&h5a,&h53,&h6c,&h65,&h7e,&h77, _&h90,&h99,&h82,&h8b,&hb4,&hbd,&ha6,&haf,&hd8,&hd1,&hca,&hc3,&hfc,&hf5,&hee,&he7, _&h3b,&h32,&h29,&h20,&h1f,&h16,&h0d,&h04,&h73,&h7a,&h61,&h68,&h57,&h5e,&h45,&h4c, _&hab,&ha2,&hb9,&hb0,&h8f,&h86,&h9d,&h94,&he3,&hea,&hf1,&hf8,&hc7,&hce,&hd5,&hdc, _&h76,&h7f,&h64,&h6d,&h52,&h5b,&h40,&h49,&h3e,&h37,&h2c,&h25,&h1a,&h13,&h08,&h01, _&he6,&hef,&hf4,&hfd,&hc2,&hcb,&hd0,&hd9,&hae,&ha7,&hbc,&hb5,&h8a,&h83,&h98,&h91, _&h4d,&h44,&h5f,&h56,&h69,&h60,&h7b,&h72,&h05,&h0c,&h17,&h1e,&h21,&h28,&h33,&h3a, _&hdd,&hd4,&hcf,&hc6,&hf9,&hf0,&heb,&he2,&h95,&h9c,&h87,&h8e,&hb1,&hb8,&ha3,&haa, _&hec,&he5,&hfe,&hf7,&hc8,&hc1,&hda,&hd3,&ha4,&had,&hb6,&hbf,&h80,&h89,&h92,&h9b, _&h7c,&h75,&h6e,&h67,&h58,&h51,&h4a,&h43,&h34,&h3d,&h26,&h2f,&h10,&h19,&h02,&h0b, _&hd7,&hde,&hc5,&hcc,&hf3,&hfa,&he1,&he8,&h9f,&h96,&h8d,&h84,&hbb,&hb2,&ha9,&ha0, _&h47,&h4e,&h55,&h5c,&h63,&h6a,&h71,&h78,&h0f,&h06,&h1d,&h14,&h2b,&h22,&h39,&h30, _&h9a,&h93,&h88,&h81,&hbe,&hb7,&hac,&ha5,&hd2,&hdb,&hc0,&hc9,&hf6,&hff,&he4,&hed, _&h0a,&h03,&h18,&h11,&h2e,&h27,&h3c,&h35,&h42,&h4b,&h50,&h59,&h66,&h6f,&h74,&h7d, _&ha1,&ha8,&hb3,&hba,&h85,&h8c,&h97,&h9e,&he9,&he0,&hfb,&hf2,&hcd,&hc4,&hdf,&hd6, _&h31,&h38,&h23,&h2a,&h15,&h1c,&h07,&h0e,&h79,&h70,&h6b,&h62,&h5d,&h54,&h4f,&h46) g11 = Array( _&h00,&h0b,&h16,&h1d,&h2c,&h27,&h3a,&h31,&h58,&h53,&h4e,&h45,&h74,&h7f,&h62,&h69, _&hb0,&hbb,&ha6,&had,&h9c,&h97,&h8a,&h81,&he8,&he3,&hfe,&hf5,&hc4,&hcf,&hd2,&hd9, _&h7b,&h70,&h6d,&h66,&h57,&h5c,&h41,&h4a,&h23,&h28,&h35,&h3e,&h0f,&h04,&h19,&h12, _&hcb,&hc0,&hdd,&hd6,&he7,&hec,&hf1,&hfa,&h93,&h98,&h85,&h8e,&hbf,&hb4,&ha9,&ha2, _&hf6,&hfd,&he0,&heb,&hda,&hd1,&hcc,&hc7,&hae,&ha5,&hb8,&hb3,&h82,&h89,&h94,&h9f, _&h46,&h4d,&h50,&h5b,&h6a,&h61,&h7c,&h77,&h1e,&h15,&h08,&h03,&h32,&h39,&h24,&h2f, _&h8d,&h86,&h9b,&h90,&ha1,&haa,&hb7,&hbc,&hd5,&hde,&hc3,&hc8,&hf9,&hf2,&hef,&he4, _&h3d,&h36,&h2b,&h20,&h11,&h1a,&h07,&h0c,&h65,&h6e,&h73,&h78,&h49,&h42,&h5f,&h54, _&hf7,&hfc,&he1,&hea,&hdb,&hd0,&hcd,&hc6,&haf,&ha4,&hb9,&hb2,&h83,&h88,&h95,&h9e, _&h47,&h4c,&h51,&h5a,&h6b,&h60,&h7d,&h76,&h1f,&h14,&h09,&h02,&h33,&h38,&h25,&h2e, _&h8c,&h87,&h9a,&h91,&ha0,&hab,&hb6,&hbd,&hd4,&hdf,&hc2,&hc9,&hf8,&hf3,&hee,&he5, _&h3c,&h37,&h2a,&h21,&h10,&h1b,&h06,&h0d,&h64,&h6f,&h72,&h79,&h48,&h43,&h5e,&h55, _&h01,&h0a,&h17,&h1c,&h2d,&h26,&h3b,&h30,&h59,&h52,&h4f,&h44,&h75,&h7e,&h63,&h68, _&hb1,&hba,&ha7,&hac,&h9d,&h96,&h8b,&h80,&he9,&he2,&hff,&hf4,&hc5,&hce,&hd3,&hd8, _&h7a,&h71,&h6c,&h67,&h56,&h5d,&h40,&h4b,&h22,&h29,&h34,&h3f,&h0e,&h05,&h18,&h13, _&hca,&hc1,&hdc,&hd7,&he6,&hed,&hf0,&hfb,&h92,&h99,&h84,&h8f,&hbe,&hb5,&ha8,&ha3) g13 = Array( _&h00,&h0d,&h1a,&h17,&h34,&h39,&h2e,&h23,&h68,&h65,&h72,&h7f,&h5c,&h51,&h46,&h4b, _&hd0,&hdd,&hca,&hc7,&he4,&he9,&hfe,&hf3,&hb8,&hb5,&ha2,&haf,&h8c,&h81,&h96,&h9b, _&hbb,&hb6,&ha1,&hac,&h8f,&h82,&h95,&h98,&hd3,&hde,&hc9,&hc4,&he7,&hea,&hfd,&hf0, _&h6b,&h66,&h71,&h7c,&h5f,&h52,&h45,&h48,&h03,&h0e,&h19,&h14,&h37,&h3a,&h2d,&h20, _&h6d,&h60,&h77,&h7a,&h59,&h54,&h43,&h4e,&h05,&h08,&h1f,&h12,&h31,&h3c,&h2b,&h26, _&hbd,&hb0,&ha7,&haa,&h89,&h84,&h93,&h9e,&hd5,&hd8,&hcf,&hc2,&he1,&hec,&hfb,&hf6, _&hd6,&hdb,&hcc,&hc1,&he2,&hef,&hf8,&hf5,&hbe,&hb3,&ha4,&ha9,&h8a,&h87,&h90,&h9d, _&h06,&h0b,&h1c,&h11,&h32,&h3f,&h28,&h25,&h6e,&h63,&h74,&h79,&h5a,&h57,&h40,&h4d, _&hda,&hd7,&hc0,&hcd,&hee,&he3,&hf4,&hf9,&hb2,&hbf,&ha8,&ha5,&h86,&h8b,&h9c,&h91, _&h0a,&h07,&h10,&h1d,&h3e,&h33,&h24,&h29,&h62,&h6f,&h78,&h75,&h56,&h5b,&h4c,&h41, _&h61,&h6c,&h7b,&h76,&h55,&h58,&h4f,&h42,&h09,&h04,&h13,&h1e,&h3d,&h30,&h27,&h2a, _&hb1,&hbc,&hab,&ha6,&h85,&h88,&h9f,&h92,&hd9,&hd4,&hc3,&hce,&hed,&he0,&hf7,&hfa, _&hb7,&hba,&had,&ha0,&h83,&h8e,&h99,&h94,&hdf,&hd2,&hc5,&hc8,&heb,&he6,&hf1,&hfc, _&h67,&h6a,&h7d,&h70,&h53,&h5e,&h49,&h44,&h0f,&h02,&h15,&h18,&h3b,&h36,&h21,&h2c, _&h0c,&h01,&h16,&h1b,&h38,&h35,&h22,&h2f,&h64,&h69,&h7e,&h73,&h50,&h5d,&h4a,&h47, _&hdc,&hd1,&hc6,&hcb,&he8,&he5,&hf2,&hff,&hb4,&hb9,&hae,&ha3,&h80,&h8d,&h9a,&h97) g14 = Array( _&h00,&h0e,&h1c,&h12,&h38,&h36,&h24,&h2a,&h70,&h7e,&h6c,&h62,&h48,&h46,&h54,&h5a, _&he0,&hee,&hfc,&hf2,&hd8,&hd6,&hc4,&hca,&h90,&h9e,&h8c,&h82,&ha8,&ha6,&hb4,&hba, _&hdb,&hd5,&hc7,&hc9,&he3,&hed,&hff,&hf1,&hab,&ha5,&hb7,&hb9,&h93,&h9d,&h8f,&h81, _&h3b,&h35,&h27,&h29,&h03,&h0d,&h1f,&h11,&h4b,&h45,&h57,&h59,&h73,&h7d,&h6f,&h61, _&had,&ha3,&hb1,&hbf,&h95,&h9b,&h89,&h87,&hdd,&hd3,&hc1,&hcf,&he5,&heb,&hf9,&hf7, _&h4d,&h43,&h51,&h5f,&h75,&h7b,&h69,&h67,&h3d,&h33,&h21,&h2f,&h05,&h0b,&h19,&h17, _&h76,&h78,&h6a,&h64,&h4e,&h40,&h52,&h5c,&h06,&h08,&h1a,&h14,&h3e,&h30,&h22,&h2c, _&h96,&h98,&h8a,&h84,&hae,&ha0,&hb2,&hbc,&he6,&he8,&hfa,&hf4,&hde,&hd0,&hc2,&hcc, _&h41,&h4f,&h5d,&h53,&h79,&h77,&h65,&h6b,&h31,&h3f,&h2d,&h23,&h09,&h07,&h15,&h1b, _&ha1,&haf,&hbd,&hb3,&h99,&h97,&h85,&h8b,&hd1,&hdf,&hcd,&hc3,&he9,&he7,&hf5,&hfb, _&h9a,&h94,&h86,&h88,&ha2,&hac,&hbe,&hb0,&hea,&he4,&hf6,&hf8,&hd2,&hdc,&hce,&hc0, _&h7a,&h74,&h66,&h68,&h42,&h4c,&h5e,&h50,&h0a,&h04,&h16,&h18,&h32,&h3c,&h2e,&h20, _&hec,&he2,&hf0,&hfe,&hd4,&hda,&hc8,&hc6,&h9c,&h92,&h80,&h8e,&ha4,&haa,&hb8,&hb6, _&h0c,&h02,&h10,&h1e,&h34,&h3a,&h28,&h26,&h7c,&h72,&h60,&h6e,&h44,&h4a,&h58,&h56, _&h37,&h39,&h2b,&h25,&h0f,&h01,&h13,&h1d,&h47,&h49,&h5b,&h55,&h7f,&h71,&h63,&h6d, _&hd7,&hd9,&hcb,&hc5,&hef,&he1,&hf3,&hfd,&ha7,&ha9,&hbb,&hb5,&h9f,&h91,&h83,&h8d) sbox = Array( _&h63, &h7c, &h77, &h7b, &hf2, &h6b, &h6f, &hc5, &h30, &h01, &h67, &h2b, &hfe, &hd7, &hab, &h76, _&hca, &h82, &hc9, &h7d, &hfa, &h59, &h47, &hf0, &had, &hd4, &ha2, &haf, &h9c, &ha4, &h72, &hc0, _&hb7, &hfd, &h93, &h26, &h36, &h3f, &hf7, &hcc, &h34, &ha5, &he5, &hf1, &h71, &hd8, &h31, &h15, _&h04, &hc7, &h23, &hc3, &h18, &h96, &h05, &h9a, &h07, &h12, &h80, &he2, &heb, &h27, &hb2, &h75, _&h09, &h83, &h2c, &h1a, &h1b, &h6e, &h5a, &ha0, &h52, &h3b, &hd6, &hb3, &h29, &he3, &h2f, &h84, _&h53, &hd1, &h00, &hed, &h20, &hfc, &hb1, &h5b, &h6a, &hcb, &hbe, &h39, &h4a, &h4c, &h58, &hcf, _&hd0, &hef, &haa, &hfb, &h43, &h4d, &h33, &h85, &h45, &hf9, &h02, &h7f, &h50, &h3c, &h9f, &ha8, _&h51, &ha3, &h40, &h8f, &h92, &h9d, &h38, &hf5, &hbc, &hb6, &hda, &h21, &h10, &hff, &hf3, &hd2, _&hcd, &h0c, &h13, &hec, &h5f, &h97, &h44, &h17, &hc4, &ha7, &h7e, &h3d, &h64, &h5d, &h19, &h73, _&h60, &h81, &h4f, &hdc, &h22, &h2a, &h90, &h88, &h46, &hee, &hb8, &h14, &hde, &h5e, &h0b, &hdb, _&he0, &h32, &h3a, &h0a, &h49, &h06, &h24, &h5c, &hc2, &hd3, &hac, &h62, &h91, &h95, &he4, &h79, _&he7, &hc8, &h37, &h6d, &h8d, &hd5, &h4e, &ha9, &h6c, &h56, &hf4, &hea, &h65, &h7a, &hae, &h08, _&hba, &h78, &h25, &h2e, &h1c, &ha6, &hb4, &hc6, &he8, &hdd, &h74, &h1f, &h4b, &hbd, &h8b, &h8a, _&h70, &h3e, &hb5, &h66, &h48, &h03, &hf6, &h0e, &h61, &h35, &h57, &hb9, &h86, &hc1, &h1d, &h9e, _&he1, &hf8, &h98, &h11, &h69, &hd9, &h8e, &h94, &h9b, &h1e, &h87, &he9, &hce, &h55, &h28, &hdf, _&h8c, &ha1, &h89, &h0d, &hbf, &he6, &h42, &h68, &h41, &h99, &h2d, &h0f, &hb0, &h54, &hbb, &h16) sboxinv = Array( _&h52, &h09, &h6a, &hd5, &h30, &h36, &ha5, &h38, &hbf, &h40, &ha3, &h9e, &h81, &hf3, &hd7, &hfb, _&h7c, &he3, &h39, &h82, &h9b, &h2f, &hff, &h87, &h34, &h8e, &h43, &h44, &hc4, &hde, &he9, &hcb, _&h54, &h7b, &h94, &h32, &ha6, &hc2, &h23, &h3d, &hee, &h4c, &h95, &h0b, &h42, &hfa, &hc3, &h4e, _&h08, &h2e, &ha1, &h66, &h28, &hd9, &h24, &hb2, &h76, &h5b, &ha2, &h49, &h6d, &h8b, &hd1, &h25, _&h72, &hf8, &hf6, &h64, &h86, &h68, &h98, &h16, &hd4, &ha4, &h5c, &hcc, &h5d, &h65, &hb6, &h92, _&h6c, &h70, &h48, &h50, &hfd, &hed, &hb9, &hda, &h5e, &h15, &h46, &h57, &ha7, &h8d, &h9d, &h84, _&h90, &hd8, &hab, &h00, &h8c, &hbc, &hd3, &h0a, &hf7, &he4, &h58, &h05, &hb8, &hb3, &h45, &h06, _&hd0, &h2c, &h1e, &h8f, &hca, &h3f, &h0f, &h02, &hc1, &haf, &hbd, &h03, &h01, &h13, &h8a, &h6b, _&h3a, &h91, &h11, &h41, &h4f, &h67, &hdc, &hea, &h97, &hf2, &hcf, &hce, &hf0, &hb4, &he6, &h73, _&h96, &hac, &h74, &h22, &he7, &had, &h35, &h85, &he2, &hf9, &h37, &he8, &h1c, &h75, &hdf, &h6e, _&h47, &hf1, &h1a, &h71, &h1d, &h29, &hc5, &h89, &h6f, &hb7, &h62, &h0e, &haa, &h18, &hbe, &h1b, _&hfc, &h56, &h3e, &h4b, &hc6, &hd2, &h79, &h20, &h9a, &hdb, &hc0, &hfe, &h78, &hcd, &h5a, &hf4, _&h1f, &hdd, &ha8, &h33, &h88, &h07, &hc7, &h31, &hb1, &h12, &h10, &h59, &h27, &h80, &hec, &h5f, _&h60, &h51, &h7f, &ha9, &h19, &hb5, &h4a, &h0d, &h2d, &he5, &h7a, &h9f, &h93, &hc9, &h9c, &hef, _&ha0, &he0, &h3b, &h4d, &hae, &h2a, &hf5, &hb0, &hc8, &heb, &hbb, &h3c, &h83, &h53, &h99, &h61, _&h17, &h2b, &h04, &h7e, &hba, &h77, &hd6, &h26, &he1, &h69, &h14, &h63, &h55, &h21, &h0c, &h7d) rcon = Array( _&h8d, &h01, &h02, &h04, &h08, &h10, &h20, &h40, &h80, &h1b, &h36, &h6c, &hd8, &hab, &h4d, &h9a, _&h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, &h6a, &hd4, &hb3, &h7d, &hfa, &hef, &hc5, &h91, &h39, _&h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, &h25, &h4a, &h94, &h33, &h66, &hcc, &h83, &h1d, &h3a, _&h74, &he8, &hcb, &h8d, &h01, &h02, &h04, &h08, &h10, &h20, &h40, &h80, &h1b, &h36, &h6c, &hd8, _&hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, &h6a, &hd4, &hb3, &h7d, &hfa, &hef, _&hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, &h25, &h4a, &h94, &h33, &h66, &hcc, _&h83, &h1d, &h3a, &h74, &he8, &hcb, &h8d, &h01, &h02, &h04, &h08, &h10, &h20, &h40, &h80, &h1b, _&h36, &h6c, &hd8, &hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, &h6a, &hd4, &hb3, _&h7d, &hfa, &hef, &hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, &h25, &h4a, &h94, _&h33, &h66, &hcc, &h83, &h1d, &h3a, &h74, &he8, &hcb, &h8d, &h01, &h02, &h04, &h08, &h10, &h20, _&h40, &h80, &h1b, &h36, &h6c, &hd8, &hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, _&h6a, &hd4, &hb3, &h7d, &hfa, &hef, &hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, _&h25, &h4a, &h94, &h33, &h66, &hcc, &h83, &h1d, &h3a, &h74, &he8, &hcb, &h8d, &h01, &h02, &h04, _&h08, &h10, &h20, &h40, &h80, &h1b, &h36, &h6c, &hd8, &hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, _&hc6, &h97, &h35, &h6a, &hd4, &hb3, &h7d, &hfa, &hef, &hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, _&h61, &hc2, &h9f, &h25, &h4a, &h94, &h33, &h66, &hcc, &h83, &h1d, &h3a, &h74, &he8, &hcb) Dim expandedKey, block(16), aesKey(32), i, isDone, j, isEncodeDim sPlain, sPass, sCipher, sTempDim oFile1, oFS, oFile2Dim x, r, y, temp(4), intTemp Set oFS = CreateObject("Scripting.FileSystemObject")Set oFile1 = oFS.OpenTextFile(sFile, ForReading) If Right(sFile, 4) <> ".enc" ThensFile = sFile & ".enc"oFS.CreateTextFile sFile, 2, TrueisEncode = TrueElsesFile = Left(sFile, Len(sFile) - 4) & ".unenc"oFS.CreateTextFile sFile, 2, TrueisEncode = FalseEnd If Set oFile2 = oFS.OpenTextFile(sFile, ForWriting)Set oFS = Nothing For i = 0 To (Len(oPW.Value) - 1)aesKey(i) = Asc(Mid(oPW.Value, i + 1, 1))Next For i = Len(oPW.Value) To 31aesKey(i) = 0Next expandedKey = expandKey(aesKey, sbox, rcon) Do Until oFile1.AtEndOfStreamsPlain = oFile1.Read(1024)sCipher = ""j = 0isDone = False Do Until isDonesTemp = Mid(sPlain, j*16 + 1, 16) If Len(sTemp) < 16 ThenFor i = Len(sTemp) To 15sTemp = sTemp & Chr(0)NextEnd If For i = 0 To 15block(i) = Asc(Mid(sTemp, (i Mod 4) * 4 + (i \ 4) + 1, 1))Next If (j + 1) * 16 >= Len(sPlain) ThenisDone = TrueEnd If j = j + 1 If isEncode Thenr= 0For i = 0 To 15block(i) = block(i) Xor expandedKey((i Mod 4) * 4 + (i \ 4))Next For x = 1 To 13block(0) = sbox(block(0))block(1) = sbox(block(1))block(2) = sbox(block(2))block(3) = sbox(block(3)) intTemp = sbox(block(4))block(4) = sbox(block(5))block(5) = sbox(block(6))block(6) = sbox(block(7))block(7) = intTemp intTemp = sbox(block(8))block(8) = sbox(block(10))block(10) = intTempintTemp = sbox(block(9))block(9) = sbox(block(11))block(11) = intTemp intTemp = sbox(block(12))block(12) = sbox(block(15))block(15) = sbox(block(14))block(14) = sbox(block(13))block(13) = intTemp r = x * 16For i = 0 To 3temp(0) = block(i)temp(1) = block(i+4)temp(2) = block(i+8)temp(3) = block(i+12) block(i) = g2(temp(0)) Xor temp(3) Xor temp(2) Xor g3(temp(1)) Xor expandedKey(r+i*4)block(i+4) = g2(temp(1)) Xor temp(0) Xor temp(3) Xor g3(temp(2)) Xor expandedKey(r+i*4+1)block(i+8) = g2(temp(2)) Xor temp(1) Xor temp(0) Xor g3(temp(3)) Xor expandedKey(r+i*4+2)block(i+12) = g2(temp(3)) Xor temp(2) Xor temp(1) Xor g3(temp(0)) Xor expandedKey(r+i*4+3)NextNext block(0) = sbox(block(0)) Xor expandedKey(224)block(1) = sbox(block(1)) Xor expandedKey(228)block(2) = sbox(block(2)) Xor expandedKey(232)block(3) = sbox(block(3)) Xor expandedKey(236) intTemp = sbox(block(4)) Xor expandedKey(237)block(4) = sbox(block(5)) Xor expandedKey(225)block(5) = sbox(block(6)) Xor expandedKey(229)block(6) = sbox(block(7)) Xor expandedKey(233)block(7) = intTemp intTemp = sbox(block(8)) Xor expandedKey(234)block(8) = sbox(block(10)) Xor expandedKey(226)block(10) = intTempintTemp = sbox(block(9)) Xor expandedKey(238)block(9) = sbox(block(11)) Xor expandedKey(230)block(11) = intTemp intTemp = sbox(block(12)) Xor expandedKey(231)block(12) = sbox(block(15)) Xor expandedKey(227)block(15) = sbox(block(14)) Xor expandedKey(239)block(14) = sbox(block(13)) Xor expandedKey(235)block(13) = intTempElseblock(0) = sboxinv(block(0) Xor expandedKey(224))block(1) = sboxinv(block(1) Xor expandedKey(228))block(2) = sboxinv(block(2) Xor expandedKey(232))block(3) = sboxinv(block(3) Xor expandedKey(236)) intTemp = sboxinv(block(4) Xor expandedKey(225))block(4) = sboxinv(block(7) Xor expandedKey(237))block(7) = sboxinv(block(6) Xor expandedKey(233))block(6) = sboxinv(block(5) Xor expandedKey(229))block(5) = intTemp intTemp = sboxinv(block(8) Xor expandedKey(226))block(8) = sboxinv(block(10) Xor expandedKey(234))block(10) = intTempintTemp = sboxinv(block(9) Xor expandedKey(230))block(9) = sboxinv(block(11) Xor expandedKey(238))block(11) = intTemp intTemp = sboxinv(block(12) Xor expandedKey(227))block(12) = sboxinv(block(13) Xor expandedKey(231))block(13) = sboxinv(block(14) Xor expandedKey(235))block(14) = sboxinv(block(15) Xor expandedKey(239))block(15) = intTemp For x = 13 To 1 Step -1r = x * 16 For i = 0 To 3temp(0) = block(i) Xor expandedKey(r+i*4)temp(1) = block(i+4) Xor expandedKey(r+i*4+1)temp(2) = block(i+8) Xor expandedKey(r+i*4+2)temp(3) = block(i+12) Xor expandedKey(r+i*4+3) block(i) = g14(temp(0)) Xor g9(temp(3)) Xor g13(temp(2)) Xor g11(temp(1))block(i+4) = g14(temp(1)) Xor g9(temp(0)) Xor g13(temp(3)) Xor g11(temp(2))block(i+8) = g14(temp(2)) Xor g9(temp(1)) Xor g13(temp(0)) Xor g11(temp(3))block(i+12) = g14(temp(3)) Xor g9(temp(2)) Xor g13(temp(1)) Xor g11(temp(0))Next block(0) = sboxinv(block(0))block(1) = sboxinv(block(1))block(2) = sboxinv(block(2))block(3) = sboxinv(block(3)) intTemp = sboxinv(block(4))block(4) = sboxinv(block(7))block(7) = sboxinv(block(6))block(6) = sboxinv(block(5))block(5) = intTemp intTemp = sboxinv(block(8))block(8) = sboxinv(block(10))block(10) = intTempintTemp = sboxinv(block(9))block(9) = sboxinv(block(11))block(11) = intTemp intTemp = sboxinv(block(12))block(12) = sboxinv(block(13))block(13) = sboxinv(block(14))block(14) = sboxinv(block(15))block(15) = intTempNext r= 0For i = 0 To 15block(i) = block(i) Xor expandedKey((i Mod 4) * 4 + (i \ 4))NextEnd If For i = 0 To 15sCipher = sCipher & Chr(block((i Mod 4) * 4 + (i \ 4)))NextLoop oFile2.Write sCipherLoop oFile1.CloseSet oFile1 = NothingoFile2.CloseSet oFile2 = Nothing
End Sub
Function keyScheduleCore(ByVal row(), ByVal a, ByRef box(), ByRef rcon())Dim result(4), i For i = 0 To 3result(i) = box(row((i + 5) Mod 4))Next result(0) = result(0) Xor rcon(a)keyScheduleCore = result
End Function
Function expandKey(ByRef key(), ByRef box(), ByRef rcon())Dim rConIter, temp, i, result(240) ReDim temp(4)rConIter = 1 For i = 0 To 31result(i) = key(i)Next For i = 32 To 239 Step 4temp(0) = result(i - 4)temp(1) = result(i - 3)temp(2) = result(i - 2)temp(3) = result(i - 1) If i Mod 32 = 0 Thentemp = keyScheduleCore(temp, rConIter, box, rcon)rConIter = rConIter + 1End If If i Mod 32 = 16 Thentemp(0) = box(temp(0))temp(1) = box(temp(1))temp(2) = box(temp(2))temp(3) = box(temp(3))End If result(i) = result(i-32) Xor temp(0)result(i+1) = result(i-31) Xor temp(1)result(i+2) = result(i-30) Xor temp(2)result(i+3) = result(i-29) Xor temp(3)Next exPandKey = result
End Function

这是密码块链接模式的代码。

Sub RunAES(sFile)Dim sbox, sboxinv, rconDim g2, g3, g9, g11, g13, g14 g2 = Array( _&h00,&h02,&h04,&h06,&h08,&h0a,&h0c,&h0e,&h10,&h12,&h14,&h16,&h18,&h1a,&h1c,&h1e, _&h20,&h22,&h24,&h26,&h28,&h2a,&h2c,&h2e,&h30,&h32,&h34,&h36,&h38,&h3a,&h3c,&h3e, _&h40,&h42,&h44,&h46,&h48,&h4a,&h4c,&h4e,&h50,&h52,&h54,&h56,&h58,&h5a,&h5c,&h5e, _&h60,&h62,&h64,&h66,&h68,&h6a,&h6c,&h6e,&h70,&h72,&h74,&h76,&h78,&h7a,&h7c,&h7e, _&h80,&h82,&h84,&h86,&h88,&h8a,&h8c,&h8e,&h90,&h92,&h94,&h96,&h98,&h9a,&h9c,&h9e, _&ha0,&ha2,&ha4,&ha6,&ha8,&haa,&hac,&hae,&hb0,&hb2,&hb4,&hb6,&hb8,&hba,&hbc,&hbe, _&hc0,&hc2,&hc4,&hc6,&hc8,&hca,&hcc,&hce,&hd0,&hd2,&hd4,&hd6,&hd8,&hda,&hdc,&hde, _&he0,&he2,&he4,&he6,&he8,&hea,&hec,&hee,&hf0,&hf2,&hf4,&hf6,&hf8,&hfa,&hfc,&hfe, _&h1b,&h19,&h1f,&h1d,&h13,&h11,&h17,&h15,&h0b,&h09,&h0f,&h0d,&h03,&h01,&h07,&h05, _&h3b,&h39,&h3f,&h3d,&h33,&h31,&h37,&h35,&h2b,&h29,&h2f,&h2d,&h23,&h21,&h27,&h25, _&h5b,&h59,&h5f,&h5d,&h53,&h51,&h57,&h55,&h4b,&h49,&h4f,&h4d,&h43,&h41,&h47,&h45, _&h7b,&h79,&h7f,&h7d,&h73,&h71,&h77,&h75,&h6b,&h69,&h6f,&h6d,&h63,&h61,&h67,&h65, _&h9b,&h99,&h9f,&h9d,&h93,&h91,&h97,&h95,&h8b,&h89,&h8f,&h8d,&h83,&h81,&h87,&h85, _&hbb,&hb9,&hbf,&hbd,&hb3,&hb1,&hb7,&hb5,&hab,&ha9,&haf,&had,&ha3,&ha1,&ha7,&ha5, _&hdb,&hd9,&hdf,&hdd,&hd3,&hd1,&hd7,&hd5,&hcb,&hc9,&hcf,&hcd,&hc3,&hc1,&hc7,&hc5, _&hfb,&hf9,&hff,&hfd,&hf3,&hf1,&hf7,&hf5,&heb,&he9,&hef,&hed,&he3,&he1,&he7,&he5) g3 = Array( _&h00,&h03,&h06,&h05,&h0c,&h0f,&h0a,&h09,&h18,&h1b,&h1e,&h1d,&h14,&h17,&h12,&h11, _&h30,&h33,&h36,&h35,&h3c,&h3f,&h3a,&h39,&h28,&h2b,&h2e,&h2d,&h24,&h27,&h22,&h21, _&h60,&h63,&h66,&h65,&h6c,&h6f,&h6a,&h69,&h78,&h7b,&h7e,&h7d,&h74,&h77,&h72,&h71, _&h50,&h53,&h56,&h55,&h5c,&h5f,&h5a,&h59,&h48,&h4b,&h4e,&h4d,&h44,&h47,&h42,&h41, _&hc0,&hc3,&hc6,&hc5,&hcc,&hcf,&hca,&hc9,&hd8,&hdb,&hde,&hdd,&hd4,&hd7,&hd2,&hd1, _&hf0,&hf3,&hf6,&hf5,&hfc,&hff,&hfa,&hf9,&he8,&heb,&hee,&hed,&he4,&he7,&he2,&he1, _&ha0,&ha3,&ha6,&ha5,&hac,&haf,&haa,&ha9,&hb8,&hbb,&hbe,&hbd,&hb4,&hb7,&hb2,&hb1, _&h90,&h93,&h96,&h95,&h9c,&h9f,&h9a,&h99,&h88,&h8b,&h8e,&h8d,&h84,&h87,&h82,&h81, _&h9b,&h98,&h9d,&h9e,&h97,&h94,&h91,&h92,&h83,&h80,&h85,&h86,&h8f,&h8c,&h89,&h8a, _&hab,&ha8,&had,&hae,&ha7,&ha4,&ha1,&ha2,&hb3,&hb0,&hb5,&hb6,&hbf,&hbc,&hb9,&hba, _&hfb,&hf8,&hfd,&hfe,&hf7,&hf4,&hf1,&hf2,&he3,&he0,&he5,&he6,&hef,&hec,&he9,&hea, _&hcb,&hc8,&hcd,&hce,&hc7,&hc4,&hc1,&hc2,&hd3,&hd0,&hd5,&hd6,&hdf,&hdc,&hd9,&hda, _&h5b,&h58,&h5d,&h5e,&h57,&h54,&h51,&h52,&h43,&h40,&h45,&h46,&h4f,&h4c,&h49,&h4a, _&h6b,&h68,&h6d,&h6e,&h67,&h64,&h61,&h62,&h73,&h70,&h75,&h76,&h7f,&h7c,&h79,&h7a, _&h3b,&h38,&h3d,&h3e,&h37,&h34,&h31,&h32,&h23,&h20,&h25,&h26,&h2f,&h2c,&h29,&h2a, _&h0b,&h08,&h0d,&h0e,&h07,&h04,&h01,&h02,&h13,&h10,&h15,&h16,&h1f,&h1c,&h19,&h1a) g9 = Array( _&h00,&h09,&h12,&h1b,&h24,&h2d,&h36,&h3f,&h48,&h41,&h5a,&h53,&h6c,&h65,&h7e,&h77, _&h90,&h99,&h82,&h8b,&hb4,&hbd,&ha6,&haf,&hd8,&hd1,&hca,&hc3,&hfc,&hf5,&hee,&he7, _&h3b,&h32,&h29,&h20,&h1f,&h16,&h0d,&h04,&h73,&h7a,&h61,&h68,&h57,&h5e,&h45,&h4c, _&hab,&ha2,&hb9,&hb0,&h8f,&h86,&h9d,&h94,&he3,&hea,&hf1,&hf8,&hc7,&hce,&hd5,&hdc, _&h76,&h7f,&h64,&h6d,&h52,&h5b,&h40,&h49,&h3e,&h37,&h2c,&h25,&h1a,&h13,&h08,&h01, _&he6,&hef,&hf4,&hfd,&hc2,&hcb,&hd0,&hd9,&hae,&ha7,&hbc,&hb5,&h8a,&h83,&h98,&h91, _&h4d,&h44,&h5f,&h56,&h69,&h60,&h7b,&h72,&h05,&h0c,&h17,&h1e,&h21,&h28,&h33,&h3a, _&hdd,&hd4,&hcf,&hc6,&hf9,&hf0,&heb,&he2,&h95,&h9c,&h87,&h8e,&hb1,&hb8,&ha3,&haa, _&hec,&he5,&hfe,&hf7,&hc8,&hc1,&hda,&hd3,&ha4,&had,&hb6,&hbf,&h80,&h89,&h92,&h9b, _&h7c,&h75,&h6e,&h67,&h58,&h51,&h4a,&h43,&h34,&h3d,&h26,&h2f,&h10,&h19,&h02,&h0b, _&hd7,&hde,&hc5,&hcc,&hf3,&hfa,&he1,&he8,&h9f,&h96,&h8d,&h84,&hbb,&hb2,&ha9,&ha0, _&h47,&h4e,&h55,&h5c,&h63,&h6a,&h71,&h78,&h0f,&h06,&h1d,&h14,&h2b,&h22,&h39,&h30, _&h9a,&h93,&h88,&h81,&hbe,&hb7,&hac,&ha5,&hd2,&hdb,&hc0,&hc9,&hf6,&hff,&he4,&hed, _&h0a,&h03,&h18,&h11,&h2e,&h27,&h3c,&h35,&h42,&h4b,&h50,&h59,&h66,&h6f,&h74,&h7d, _&ha1,&ha8,&hb3,&hba,&h85,&h8c,&h97,&h9e,&he9,&he0,&hfb,&hf2,&hcd,&hc4,&hdf,&hd6, _&h31,&h38,&h23,&h2a,&h15,&h1c,&h07,&h0e,&h79,&h70,&h6b,&h62,&h5d,&h54,&h4f,&h46) g11 = Array( _&h00,&h0b,&h16,&h1d,&h2c,&h27,&h3a,&h31,&h58,&h53,&h4e,&h45,&h74,&h7f,&h62,&h69, _&hb0,&hbb,&ha6,&had,&h9c,&h97,&h8a,&h81,&he8,&he3,&hfe,&hf5,&hc4,&hcf,&hd2,&hd9, _&h7b,&h70,&h6d,&h66,&h57,&h5c,&h41,&h4a,&h23,&h28,&h35,&h3e,&h0f,&h04,&h19,&h12, _&hcb,&hc0,&hdd,&hd6,&he7,&hec,&hf1,&hfa,&h93,&h98,&h85,&h8e,&hbf,&hb4,&ha9,&ha2, _&hf6,&hfd,&he0,&heb,&hda,&hd1,&hcc,&hc7,&hae,&ha5,&hb8,&hb3,&h82,&h89,&h94,&h9f, _&h46,&h4d,&h50,&h5b,&h6a,&h61,&h7c,&h77,&h1e,&h15,&h08,&h03,&h32,&h39,&h24,&h2f, _&h8d,&h86,&h9b,&h90,&ha1,&haa,&hb7,&hbc,&hd5,&hde,&hc3,&hc8,&hf9,&hf2,&hef,&he4, _&h3d,&h36,&h2b,&h20,&h11,&h1a,&h07,&h0c,&h65,&h6e,&h73,&h78,&h49,&h42,&h5f,&h54, _&hf7,&hfc,&he1,&hea,&hdb,&hd0,&hcd,&hc6,&haf,&ha4,&hb9,&hb2,&h83,&h88,&h95,&h9e, _&h47,&h4c,&h51,&h5a,&h6b,&h60,&h7d,&h76,&h1f,&h14,&h09,&h02,&h33,&h38,&h25,&h2e, _&h8c,&h87,&h9a,&h91,&ha0,&hab,&hb6,&hbd,&hd4,&hdf,&hc2,&hc9,&hf8,&hf3,&hee,&he5, _&h3c,&h37,&h2a,&h21,&h10,&h1b,&h06,&h0d,&h64,&h6f,&h72,&h79,&h48,&h43,&h5e,&h55, _&h01,&h0a,&h17,&h1c,&h2d,&h26,&h3b,&h30,&h59,&h52,&h4f,&h44,&h75,&h7e,&h63,&h68, _&hb1,&hba,&ha7,&hac,&h9d,&h96,&h8b,&h80,&he9,&he2,&hff,&hf4,&hc5,&hce,&hd3,&hd8, _&h7a,&h71,&h6c,&h67,&h56,&h5d,&h40,&h4b,&h22,&h29,&h34,&h3f,&h0e,&h05,&h18,&h13, _&hca,&hc1,&hdc,&hd7,&he6,&hed,&hf0,&hfb,&h92,&h99,&h84,&h8f,&hbe,&hb5,&ha8,&ha3) g13 = Array( _&h00,&h0d,&h1a,&h17,&h34,&h39,&h2e,&h23,&h68,&h65,&h72,&h7f,&h5c,&h51,&h46,&h4b, _&hd0,&hdd,&hca,&hc7,&he4,&he9,&hfe,&hf3,&hb8,&hb5,&ha2,&haf,&h8c,&h81,&h96,&h9b, _&hbb,&hb6,&ha1,&hac,&h8f,&h82,&h95,&h98,&hd3,&hde,&hc9,&hc4,&he7,&hea,&hfd,&hf0, _&h6b,&h66,&h71,&h7c,&h5f,&h52,&h45,&h48,&h03,&h0e,&h19,&h14,&h37,&h3a,&h2d,&h20, _&h6d,&h60,&h77,&h7a,&h59,&h54,&h43,&h4e,&h05,&h08,&h1f,&h12,&h31,&h3c,&h2b,&h26, _&hbd,&hb0,&ha7,&haa,&h89,&h84,&h93,&h9e,&hd5,&hd8,&hcf,&hc2,&he1,&hec,&hfb,&hf6, _&hd6,&hdb,&hcc,&hc1,&he2,&hef,&hf8,&hf5,&hbe,&hb3,&ha4,&ha9,&h8a,&h87,&h90,&h9d, _&h06,&h0b,&h1c,&h11,&h32,&h3f,&h28,&h25,&h6e,&h63,&h74,&h79,&h5a,&h57,&h40,&h4d, _&hda,&hd7,&hc0,&hcd,&hee,&he3,&hf4,&hf9,&hb2,&hbf,&ha8,&ha5,&h86,&h8b,&h9c,&h91, _&h0a,&h07,&h10,&h1d,&h3e,&h33,&h24,&h29,&h62,&h6f,&h78,&h75,&h56,&h5b,&h4c,&h41, _&h61,&h6c,&h7b,&h76,&h55,&h58,&h4f,&h42,&h09,&h04,&h13,&h1e,&h3d,&h30,&h27,&h2a, _&hb1,&hbc,&hab,&ha6,&h85,&h88,&h9f,&h92,&hd9,&hd4,&hc3,&hce,&hed,&he0,&hf7,&hfa, _&hb7,&hba,&had,&ha0,&h83,&h8e,&h99,&h94,&hdf,&hd2,&hc5,&hc8,&heb,&he6,&hf1,&hfc, _&h67,&h6a,&h7d,&h70,&h53,&h5e,&h49,&h44,&h0f,&h02,&h15,&h18,&h3b,&h36,&h21,&h2c, _&h0c,&h01,&h16,&h1b,&h38,&h35,&h22,&h2f,&h64,&h69,&h7e,&h73,&h50,&h5d,&h4a,&h47, _&hdc,&hd1,&hc6,&hcb,&he8,&he5,&hf2,&hff,&hb4,&hb9,&hae,&ha3,&h80,&h8d,&h9a,&h97) g14 = Array( _&h00,&h0e,&h1c,&h12,&h38,&h36,&h24,&h2a,&h70,&h7e,&h6c,&h62,&h48,&h46,&h54,&h5a, _&he0,&hee,&hfc,&hf2,&hd8,&hd6,&hc4,&hca,&h90,&h9e,&h8c,&h82,&ha8,&ha6,&hb4,&hba, _&hdb,&hd5,&hc7,&hc9,&he3,&hed,&hff,&hf1,&hab,&ha5,&hb7,&hb9,&h93,&h9d,&h8f,&h81, _&h3b,&h35,&h27,&h29,&h03,&h0d,&h1f,&h11,&h4b,&h45,&h57,&h59,&h73,&h7d,&h6f,&h61, _&had,&ha3,&hb1,&hbf,&h95,&h9b,&h89,&h87,&hdd,&hd3,&hc1,&hcf,&he5,&heb,&hf9,&hf7, _&h4d,&h43,&h51,&h5f,&h75,&h7b,&h69,&h67,&h3d,&h33,&h21,&h2f,&h05,&h0b,&h19,&h17, _&h76,&h78,&h6a,&h64,&h4e,&h40,&h52,&h5c,&h06,&h08,&h1a,&h14,&h3e,&h30,&h22,&h2c, _&h96,&h98,&h8a,&h84,&hae,&ha0,&hb2,&hbc,&he6,&he8,&hfa,&hf4,&hde,&hd0,&hc2,&hcc, _&h41,&h4f,&h5d,&h53,&h79,&h77,&h65,&h6b,&h31,&h3f,&h2d,&h23,&h09,&h07,&h15,&h1b, _&ha1,&haf,&hbd,&hb3,&h99,&h97,&h85,&h8b,&hd1,&hdf,&hcd,&hc3,&he9,&he7,&hf5,&hfb, _&h9a,&h94,&h86,&h88,&ha2,&hac,&hbe,&hb0,&hea,&he4,&hf6,&hf8,&hd2,&hdc,&hce,&hc0, _&h7a,&h74,&h66,&h68,&h42,&h4c,&h5e,&h50,&h0a,&h04,&h16,&h18,&h32,&h3c,&h2e,&h20, _&hec,&he2,&hf0,&hfe,&hd4,&hda,&hc8,&hc6,&h9c,&h92,&h80,&h8e,&ha4,&haa,&hb8,&hb6, _&h0c,&h02,&h10,&h1e,&h34,&h3a,&h28,&h26,&h7c,&h72,&h60,&h6e,&h44,&h4a,&h58,&h56, _&h37,&h39,&h2b,&h25,&h0f,&h01,&h13,&h1d,&h47,&h49,&h5b,&h55,&h7f,&h71,&h63,&h6d, _&hd7,&hd9,&hcb,&hc5,&hef,&he1,&hf3,&hfd,&ha7,&ha9,&hbb,&hb5,&h9f,&h91,&h83,&h8d) sbox = Array( _&h63, &h7c, &h77, &h7b, &hf2, &h6b, &h6f, &hc5, &h30, &h01, &h67, &h2b, &hfe, &hd7, &hab, &h76, _&hca, &h82, &hc9, &h7d, &hfa, &h59, &h47, &hf0, &had, &hd4, &ha2, &haf, &h9c, &ha4, &h72, &hc0, _&hb7, &hfd, &h93, &h26, &h36, &h3f, &hf7, &hcc, &h34, &ha5, &he5, &hf1, &h71, &hd8, &h31, &h15, _&h04, &hc7, &h23, &hc3, &h18, &h96, &h05, &h9a, &h07, &h12, &h80, &he2, &heb, &h27, &hb2, &h75, _&h09, &h83, &h2c, &h1a, &h1b, &h6e, &h5a, &ha0, &h52, &h3b, &hd6, &hb3, &h29, &he3, &h2f, &h84, _&h53, &hd1, &h00, &hed, &h20, &hfc, &hb1, &h5b, &h6a, &hcb, &hbe, &h39, &h4a, &h4c, &h58, &hcf, _&hd0, &hef, &haa, &hfb, &h43, &h4d, &h33, &h85, &h45, &hf9, &h02, &h7f, &h50, &h3c, &h9f, &ha8, _&h51, &ha3, &h40, &h8f, &h92, &h9d, &h38, &hf5, &hbc, &hb6, &hda, &h21, &h10, &hff, &hf3, &hd2, _&hcd, &h0c, &h13, &hec, &h5f, &h97, &h44, &h17, &hc4, &ha7, &h7e, &h3d, &h64, &h5d, &h19, &h73, _&h60, &h81, &h4f, &hdc, &h22, &h2a, &h90, &h88, &h46, &hee, &hb8, &h14, &hde, &h5e, &h0b, &hdb, _&he0, &h32, &h3a, &h0a, &h49, &h06, &h24, &h5c, &hc2, &hd3, &hac, &h62, &h91, &h95, &he4, &h79, _&he7, &hc8, &h37, &h6d, &h8d, &hd5, &h4e, &ha9, &h6c, &h56, &hf4, &hea, &h65, &h7a, &hae, &h08, _&hba, &h78, &h25, &h2e, &h1c, &ha6, &hb4, &hc6, &he8, &hdd, &h74, &h1f, &h4b, &hbd, &h8b, &h8a, _&h70, &h3e, &hb5, &h66, &h48, &h03, &hf6, &h0e, &h61, &h35, &h57, &hb9, &h86, &hc1, &h1d, &h9e, _&he1, &hf8, &h98, &h11, &h69, &hd9, &h8e, &h94, &h9b, &h1e, &h87, &he9, &hce, &h55, &h28, &hdf, _&h8c, &ha1, &h89, &h0d, &hbf, &he6, &h42, &h68, &h41, &h99, &h2d, &h0f, &hb0, &h54, &hbb, &h16) sboxinv = Array( _&h52, &h09, &h6a, &hd5, &h30, &h36, &ha5, &h38, &hbf, &h40, &ha3, &h9e, &h81, &hf3, &hd7, &hfb, _&h7c, &he3, &h39, &h82, &h9b, &h2f, &hff, &h87, &h34, &h8e, &h43, &h44, &hc4, &hde, &he9, &hcb, _&h54, &h7b, &h94, &h32, &ha6, &hc2, &h23, &h3d, &hee, &h4c, &h95, &h0b, &h42, &hfa, &hc3, &h4e, _&h08, &h2e, &ha1, &h66, &h28, &hd9, &h24, &hb2, &h76, &h5b, &ha2, &h49, &h6d, &h8b, &hd1, &h25, _&h72, &hf8, &hf6, &h64, &h86, &h68, &h98, &h16, &hd4, &ha4, &h5c, &hcc, &h5d, &h65, &hb6, &h92, _&h6c, &h70, &h48, &h50, &hfd, &hed, &hb9, &hda, &h5e, &h15, &h46, &h57, &ha7, &h8d, &h9d, &h84, _&h90, &hd8, &hab, &h00, &h8c, &hbc, &hd3, &h0a, &hf7, &he4, &h58, &h05, &hb8, &hb3, &h45, &h06, _&hd0, &h2c, &h1e, &h8f, &hca, &h3f, &h0f, &h02, &hc1, &haf, &hbd, &h03, &h01, &h13, &h8a, &h6b, _&h3a, &h91, &h11, &h41, &h4f, &h67, &hdc, &hea, &h97, &hf2, &hcf, &hce, &hf0, &hb4, &he6, &h73, _&h96, &hac, &h74, &h22, &he7, &had, &h35, &h85, &he2, &hf9, &h37, &he8, &h1c, &h75, &hdf, &h6e, _&h47, &hf1, &h1a, &h71, &h1d, &h29, &hc5, &h89, &h6f, &hb7, &h62, &h0e, &haa, &h18, &hbe, &h1b, _&hfc, &h56, &h3e, &h4b, &hc6, &hd2, &h79, &h20, &h9a, &hdb, &hc0, &hfe, &h78, &hcd, &h5a, &hf4, _&h1f, &hdd, &ha8, &h33, &h88, &h07, &hc7, &h31, &hb1, &h12, &h10, &h59, &h27, &h80, &hec, &h5f, _&h60, &h51, &h7f, &ha9, &h19, &hb5, &h4a, &h0d, &h2d, &he5, &h7a, &h9f, &h93, &hc9, &h9c, &hef, _&ha0, &he0, &h3b, &h4d, &hae, &h2a, &hf5, &hb0, &hc8, &heb, &hbb, &h3c, &h83, &h53, &h99, &h61, _&h17, &h2b, &h04, &h7e, &hba, &h77, &hd6, &h26, &he1, &h69, &h14, &h63, &h55, &h21, &h0c, &h7d) rcon = Array( _&h8d, &h01, &h02, &h04, &h08, &h10, &h20, &h40, &h80, &h1b, &h36, &h6c, &hd8, &hab, &h4d, &h9a, _&h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, &h6a, &hd4, &hb3, &h7d, &hfa, &hef, &hc5, &h91, &h39, _&h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, &h25, &h4a, &h94, &h33, &h66, &hcc, &h83, &h1d, &h3a, _&h74, &he8, &hcb, &h8d, &h01, &h02, &h04, &h08, &h10, &h20, &h40, &h80, &h1b, &h36, &h6c, &hd8, _&hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, &h6a, &hd4, &hb3, &h7d, &hfa, &hef, _&hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, &h25, &h4a, &h94, &h33, &h66, &hcc, _&h83, &h1d, &h3a, &h74, &he8, &hcb, &h8d, &h01, &h02, &h04, &h08, &h10, &h20, &h40, &h80, &h1b, _&h36, &h6c, &hd8, &hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, &h6a, &hd4, &hb3, _&h7d, &hfa, &hef, &hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, &h25, &h4a, &h94, _&h33, &h66, &hcc, &h83, &h1d, &h3a, &h74, &he8, &hcb, &h8d, &h01, &h02, &h04, &h08, &h10, &h20, _&h40, &h80, &h1b, &h36, &h6c, &hd8, &hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, &hc6, &h97, &h35, _&h6a, &hd4, &hb3, &h7d, &hfa, &hef, &hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, &h61, &hc2, &h9f, _&h25, &h4a, &h94, &h33, &h66, &hcc, &h83, &h1d, &h3a, &h74, &he8, &hcb, &h8d, &h01, &h02, &h04, _&h08, &h10, &h20, &h40, &h80, &h1b, &h36, &h6c, &hd8, &hab, &h4d, &h9a, &h2f, &h5e, &hbc, &h63, _&hc6, &h97, &h35, &h6a, &hd4, &hb3, &h7d, &hfa, &hef, &hc5, &h91, &h39, &h72, &he4, &hd3, &hbd, _&h61, &hc2, &h9f, &h25, &h4a, &h94, &h33, &h66, &hcc, &h83, &h1d, &h3a, &h74, &he8, &hcb) Dim expandedKey, block(16), aesKey(32), i, isDone, j, isEncodeDim sPlain, sPass, sCipher, sTemp, nonce(16), priorCipher(16)Dim oFile1, oFS, oFile2Dim x, r, y, temp(4), intTemp Set oFS = CreateObject("Scripting.FileSystemObject")Set oFile1 = oFS.OpenTextFile(sFile, ForReading) If Right(sFile, 4) <> ".enc" ThensFile = sFile & ".enc"oFS.CreateTextFile sFile, 2, TrueisEncode = TrueElsesFile = Left(sFile, Len(sFile) - 4) & ".unenc"oFS.CreateTextFile sFile, 2, TrueisEncode = FalseEnd If Set oFile2 = oFS.OpenTextFile(sFile, ForWriting)Set oFS = Nothing For i = 0 To 15nonce(i) = 0Next For i = 0 To (Len(oPW.Value) - 1)aesKey(i) = Asc(Mid(oPW.Value, i + 1, 1))Next For i = Len(oPW.Value) To 31aesKey(i) = 0Next expandedKey = expandKey(aesKey, sbox, rcon) Do Until oFile1.AtEndOfStreamsPlain = oFile1.Read(1024)sCipher = ""j = 0isDone = False Do Until isDonesTemp = Mid(sPlain, j*16 + 1, 16) If Len(sTemp) < 16 ThenFor i = Len(sTemp) To 15sTemp = sTemp & Chr(0)NextEnd If For i = 0 To 15block(i) = Asc(Mid(sTemp, (i Mod 4) * 4 + (i \ 4) + 1, 1))Next If (j + 1) * 16 >= Len(sPlain) ThenisDone = TrueEnd If j = j + 1 If isEncode Thenr= 0For i = 0 To 15block(i) = block(i) Xor nonce(i) Xor expandedKey((i Mod 4) * 4 + (i \ 4))Next For x = 1 To 13block(0) = sbox(block(0))block(1) = sbox(block(1))block(2) = sbox(block(2))block(3) = sbox(block(3)) intTemp = sbox(block(4))block(4) = sbox(block(5))block(5) = sbox(block(6))block(6) = sbox(block(7))block(7) = intTemp intTemp = sbox(block(8))block(8) = sbox(block(10))block(10) = intTempintTemp = sbox(block(9))block(9) = sbox(block(11))block(11) = intTemp intTemp = sbox(block(12))block(12) = sbox(block(15))block(15) = sbox(block(14))block(14) = sbox(block(13))block(13) = intTemp r = x * 16For i = 0 To 3temp(0) = block(i)temp(1) = block(i+4)temp(2) = block(i+8)temp(3) = block(i+12) block(i) = g2(temp(0)) Xor temp(3) Xor temp(2) Xor g3(temp(1)) Xor expandedKey(r+i*4)block(i+4) = g2(temp(1)) Xor temp(0) Xor temp(3) Xor g3(temp(2)) Xor expandedKey(r+i*4+1)block(i+8) = g2(temp(2)) Xor temp(1) Xor temp(0) Xor g3(temp(3)) Xor expandedKey(r+i*4+2)block(i+12) = g2(temp(3)) Xor temp(2) Xor temp(1) Xor g3(temp(0)) Xor expandedKey(r+i*4+3)NextNext block(0) = sbox(block(0)) Xor expandedKey(224)block(1) = sbox(block(1)) Xor expandedKey(228)block(2) = sbox(block(2)) Xor expandedKey(232)block(3) = sbox(block(3)) Xor expandedKey(236) intTemp = sbox(block(4)) Xor expandedKey(237)block(4) = sbox(block(5)) Xor expandedKey(225)block(5) = sbox(block(6)) Xor expandedKey(229)block(6) = sbox(block(7)) Xor expandedKey(233)block(7) = intTemp intTemp = sbox(block(8)) Xor expandedKey(234)block(8) = sbox(block(10)) Xor expandedKey(226)block(10) = intTempintTemp = sbox(block(9)) Xor expandedKey(238)block(9) = sbox(block(11)) Xor expandedKey(230)block(11) = intTemp intTemp = sbox(block(12)) Xor expandedKey(231)block(12) = sbox(block(15)) Xor expandedKey(227)block(15) = sbox(block(14)) Xor expandedKey(239)block(14) = sbox(block(13)) Xor expandedKey(235)block(13) = intTemp For i = 0 To 15nonce(i) = block(i)NextElseFor i = 0 To 15priorCipher(i) = block(i)Next block(0) = sboxinv(block(0) Xor expandedKey(224))block(1) = sboxinv(block(1) Xor expandedKey(228))block(2) = sboxinv(block(2) Xor expandedKey(232))block(3) = sboxinv(block(3) Xor expandedKey(236)) intTemp = sboxinv(block(4) Xor expandedKey(225))block(4) = sboxinv(block(7) Xor expandedKey(237))block(7) = sboxinv(block(6) Xor expandedKey(233))block(6) = sboxinv(block(5) Xor expandedKey(229))block(5) = intTemp intTemp = sboxinv(block(8) Xor expandedKey(226))block(8) = sboxinv(block(10) Xor expandedKey(234))block(10) = intTempintTemp = sboxinv(block(9) Xor expandedKey(230))block(9) = sboxinv(block(11) Xor expandedKey(238))block(11) = intTemp intTemp = sboxinv(block(12) Xor expandedKey(227))block(12) = sboxinv(block(13) Xor expandedKey(231))block(13) = sboxinv(block(14) Xor expandedKey(235))block(14) = sboxinv(block(15) Xor expandedKey(239))block(15) = intTemp For x = 13 To 1 Step -1r = x * 16 For i = 0 To 3temp(0) = block(i) Xor expandedKey(r+i*4)temp(1) = block(i+4) Xor expandedKey(r+i*4+1)temp(2) = block(i+8) Xor expandedKey(r+i*4+2)temp(3) = block(i+12) Xor expandedKey(r+i*4+3) block(i) = g14(temp(0)) Xor g9(temp(3)) Xor g13(temp(2)) Xor g11(temp(1))block(i+4) = g14(temp(1)) Xor g9(temp(0)) Xor g13(temp(3)) Xor g11(temp(2))block(i+8) = g14(temp(2)) Xor g9(temp(1)) Xor g13(temp(0)) Xor g11(temp(3))block(i+12) = g14(temp(3)) Xor g9(temp(2)) Xor g13(temp(1)) Xor g11(temp(0))Next block(0) = sboxinv(block(0))block(1) = sboxinv(block(1))block(2) = sboxinv(block(2))block(3) = sboxinv(block(3)) intTemp = sboxinv(block(4))block(4) = sboxinv(block(7))block(7) = sboxinv(block(6))block(6) = sboxinv(block(5))block(5) = intTemp intTemp = sboxinv(block(8))block(8) = sboxinv(block(10))block(10) = intTempintTemp = sboxinv(block(9))block(9) = sboxinv(block(11))block(11) = intTemp intTemp = sboxinv(block(12))block(12) = sboxinv(block(13))block(13) = sboxinv(block(14))block(14) = sboxinv(block(15))block(15) = intTempNext r= 0For i = 0 To 15block(i) = block(i) Xor expandedKey((i Mod 4) * 4 + (i \ 4)) Xor nonce(i)nonce(i) = priorCipher(i)NextEnd If For i = 0 To 15sCipher = sCipher & Chr(block((i Mod 4) * 4 + (i \ 4)))NextLoop oFile2.Write sCipherLoop oFile1.CloseSet oFile1 = NothingoFile2.CloseSet oFile2 = Nothing
End Sub

From: https://bytes.com/topic/access/insights/906850-aes-encryption-algorithm-vba-vbscript