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336 lines
10 KiB
336 lines
10 KiB
namespace Admin.NET.Core;
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public class SM4
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{
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public const int SM4_ENCRYPT = 1;
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public const int SM4_DECRYPT = 0;
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// JS前后端加密不一样
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public bool FOR_JAVASCRIPT = false;
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private long GET_ULONG_BE(byte[] b, int i)
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{
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long n = 0;
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if (FOR_JAVASCRIPT)
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{
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n = (b[i] & 0xff) << 24 | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8) | (b[i + 3] & 0xff) & 0xff;
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}
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else
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{
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n = (long)(b[i] & 0xff) << 24 | (long)((b[i + 1] & 0xff) << 16) | (long)((b[i + 2] & 0xff) << 8) | b[i + 3] & 0xff & 0xffffffffL;
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}
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return n;
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}
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private void PUT_ULONG_BE(long n, byte[] b, int i)
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{
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b[i] = (byte)(int)(0xFF & n >> 24);
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b[i + 1] = (byte)(int)(0xFF & n >> 16);
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b[i + 2] = (byte)(int)(0xFF & n >> 8);
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b[i + 3] = (byte)(int)(0xFF & n);
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}
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private long SHL(long x, int n)
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{
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return (x & 0xFFFFFFFF) << n;
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}
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private long ROTL(long x, int n)
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{
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return SHL(x, n) | x >> (32 - n);
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}
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private void SWAP(long[] sk, int i)
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{
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long t = sk[i];
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sk[i] = sk[(31 - i)];
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sk[(31 - i)] = t;
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}
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public byte[] SboxTable = new byte[] {
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0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7,
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0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
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0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3,
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0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
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0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a,
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0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
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0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95,
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0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
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0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba,
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0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
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0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b,
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0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
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0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2,
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0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
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0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52,
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0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
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0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5,
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0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
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0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
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0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
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0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60,
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0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
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0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f,
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0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
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0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f,
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0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
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0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd,
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0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
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0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e,
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0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
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0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20,
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0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
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};
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public uint[] FK = {
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0xa3b1bac6,
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0x56aa3350,
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0x677d9197,
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0xb27022dc
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};
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public uint[] CK = {
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0x00070e15,0x1c232a31,0x383f464d,0x545b6269,
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0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,
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0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,
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0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,
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0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,
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0x30373e45,0x4c535a61,0x686f767d,0x848b9299,
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0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,
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0x10171e25,0x2c333a41,0x484f565d,0x646b7279
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};
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private byte Sm4Sbox(byte inch)
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{
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int i = inch & 0xFF;
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byte retVal = SboxTable[i];
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return retVal;
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}
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private long Sm4Lt(long ka)
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{
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byte[] a = new byte[4];
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byte[] b = new byte[4];
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PUT_ULONG_BE(ka, a, 0);
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b[0] = Sm4Sbox(a[0]);
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b[1] = Sm4Sbox(a[1]);
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b[2] = Sm4Sbox(a[2]);
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b[3] = Sm4Sbox(a[3]);
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long bb = GET_ULONG_BE(b, 0);
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long c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
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return c;
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}
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private long Sm4F(long x0, long x1, long x2, long x3, long rk)
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{
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return x0 ^ Sm4Lt(x1 ^ x2 ^ x3 ^ rk);
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}
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private long Sm4CalciRK(long ka)
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{
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byte[] a = new byte[4];
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byte[] b = new byte[4];
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PUT_ULONG_BE(ka, a, 0);
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b[0] = Sm4Sbox(a[0]);
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b[1] = Sm4Sbox(a[1]);
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b[2] = Sm4Sbox(a[2]);
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b[3] = Sm4Sbox(a[3]);
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long bb = GET_ULONG_BE(b, 0);
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long rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
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return rk;
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}
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private void Sm4_setkey(long[] SK, byte[] key)
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{
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long[] MK = new long[4];
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long[] k = new long[36];
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int i = 0;
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MK[0] = GET_ULONG_BE(key, 0);
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MK[1] = GET_ULONG_BE(key, 4);
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MK[2] = GET_ULONG_BE(key, 8);
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MK[3] = GET_ULONG_BE(key, 12);
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k[0] = MK[0] ^ (long)FK[0];
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k[1] = MK[1] ^ (long)FK[1];
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k[2] = MK[2] ^ (long)FK[2];
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k[3] = MK[3] ^ (long)FK[3];
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for (; i < 32; i++)
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{
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k[(i + 4)] = (k[i] ^ Sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (long)CK[i]));
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SK[i] = k[(i + 4)];
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}
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}
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private void Sm4_one_round(long[] sk, byte[] input, byte[] output)
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{
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int i = 0;
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long[] ulbuf = new long[36];
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ulbuf[0] = GET_ULONG_BE(input, 0);
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ulbuf[1] = GET_ULONG_BE(input, 4);
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ulbuf[2] = GET_ULONG_BE(input, 8);
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ulbuf[3] = GET_ULONG_BE(input, 12);
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while (i < 32)
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{
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ulbuf[(i + 4)] = Sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
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i++;
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}
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PUT_ULONG_BE(ulbuf[35], output, 0);
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PUT_ULONG_BE(ulbuf[34], output, 4);
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PUT_ULONG_BE(ulbuf[33], output, 8);
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PUT_ULONG_BE(ulbuf[32], output, 12);
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}
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private static byte[] Padding(byte[] input, int mode)
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{
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if (input == null)
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{
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return null;
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}
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byte[] ret;
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if (mode == SM4_ENCRYPT)
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{
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int p = 16 - input.Length % 16;
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ret = new byte[input.Length + p];
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Array.Copy(input, 0, ret, 0, input.Length);
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for (int i = 0; i < p; i++)
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{
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ret[input.Length + i] = (byte)p;
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}
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}
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else
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{
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int p = input[input.Length - 1];
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ret = new byte[input.Length - p];
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Array.Copy(input, 0, ret, 0, input.Length - p);
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}
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return ret;
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}
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public void Sm4_setkey_enc(SM4_Context ctx, byte[] key)
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{
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ctx.mode = SM4_ENCRYPT;
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Sm4_setkey(ctx.sk, key);
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}
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public void Sm4_setkey_dec(SM4_Context ctx, byte[] key)
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{
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ctx.mode = SM4_DECRYPT;
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Sm4_setkey(ctx.sk, key);
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int i;
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for (i = 0; i < 16; i++)
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{
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SWAP(ctx.sk, i);
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}
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}
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public byte[] Sm4_crypt_ecb(SM4_Context ctx, byte[] input)
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{
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if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT))
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{
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input = Padding(input, SM4_ENCRYPT);
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}
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int length = input.Length;
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byte[] bins = new byte[length];
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Array.Copy(input, 0, bins, 0, length);
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byte[] bous = new byte[length];
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for (int i = 0; length > 0; length -= 16, i++)
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{
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byte[] inBytes = new byte[16];
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byte[] outBytes = new byte[16];
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Array.Copy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
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Sm4_one_round(ctx.sk, inBytes, outBytes);
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Array.Copy(outBytes, 0, bous, i * 16, length > 16 ? 16 : length);
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}
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if (ctx.isPadding && ctx.mode == SM4_DECRYPT)
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{
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bous = Padding(bous, SM4_DECRYPT);
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}
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return bous;
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}
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public byte[] Sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input)
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{
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if (ctx.isPadding && ctx.mode == SM4_ENCRYPT)
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{
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input = Padding(input, SM4_ENCRYPT);
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}
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int i = 0;
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int length = input.Length;
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byte[] bins = new byte[length];
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Array.Copy(input, 0, bins, 0, length);
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var bousList = new List<byte>();
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if (ctx.mode == SM4_ENCRYPT)
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{
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for (int j = 0; length > 0; length -= 16, j++)
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{
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byte[] inBytes = new byte[16];
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byte[] outBytes = new byte[16];
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byte[] out1 = new byte[16];
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Array.Copy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
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for (i = 0; i < 16; i++)
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{
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outBytes[i] = ((byte)(inBytes[i] ^ iv[i]));
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}
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Sm4_one_round(ctx.sk, outBytes, out1);
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Array.Copy(out1, 0, iv, 0, 16);
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for (int k = 0; k < 16; k++)
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{
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bousList.Add(out1[k]);
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}
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}
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}
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else
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{
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byte[] temp = new byte[16];
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for (int j = 0; length > 0; length -= 16, j++)
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{
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byte[] inBytes = new byte[16];
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byte[] outBytes = new byte[16];
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byte[] out1 = new byte[16];
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Array.Copy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
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Array.Copy(inBytes, 0, temp, 0, 16);
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Sm4_one_round(ctx.sk, inBytes, outBytes);
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for (i = 0; i < 16; i++)
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{
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out1[i] = ((byte)(outBytes[i] ^ iv[i]));
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}
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Array.Copy(temp, 0, iv, 0, 16);
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for (int k = 0; k < 16; k++)
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{
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bousList.Add(out1[k]);
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}
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}
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}
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if (ctx.isPadding && ctx.mode == SM4_DECRYPT)
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{
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byte[] bous = Padding(bousList.ToArray(), SM4_DECRYPT);
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return bous;
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}
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else
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{
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return bousList.ToArray();
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}
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}
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}
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public class SM4_Context
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{
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public int mode;
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public long[] sk;
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public bool isPadding;
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public SM4_Context()
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{
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this.mode = 1;
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this.isPadding = true;
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this.sk = new long[32];
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}
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}
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