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@@ -0,0 +1,315 @@
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+namespace YS.SM4
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+{
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+ public class SM4Provider
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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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+
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+ private long GET_ULONG_BE(byte[] b, int i)
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+ {
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+ long n = (long)(b[i] & 0xff) << 24 | (long)((b[i + 1] & 0xff) << 16) | (long)((b[i + 2] & 0xff) << 8) | (long)(b[i + 3] & 0xff) & 0xffffffffL;
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+ return n;
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+ }
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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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+
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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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+
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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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+
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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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+
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+ public byte[] SboxTable = new byte[] { (byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe,
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+ (byte) 0xcc, (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6,
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+ 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b, 0x67,
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+ (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3,
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+ (byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06,
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+ (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91,
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+ (byte) 0xef, (byte) 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43,
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+ (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4,
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+ (byte) 0xb3, 0x1c, (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8,
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+ (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94, (byte) 0xfa,
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+ 0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7,
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+ (byte) 0xfc, (byte) 0xf3, 0x73, 0x17, (byte) 0xba, (byte) 0x83,
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+ 0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8,
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+ 0x68, 0x6b, (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda,
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+ (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70, 0x56,
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+ (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1,
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+ (byte) 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, (byte) 0x87,
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+ (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27,
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+ 0x52, 0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4,
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+ (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf, (byte) 0x8a,
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+ (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3,
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+ (byte) 0xf7, (byte) 0xf2, (byte) 0xce, (byte) 0xf9, 0x61, 0x15,
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+ (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4,
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+ (byte) 0x9b, 0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32,
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+ 0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3, 0x1d,
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+ (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca,
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+ 0x60, (byte) 0xc0, 0x29, 0x23, (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f,
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+ (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd,
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+ (byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b,
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+ 0x51, (byte) 0x8d, 0x1b, (byte) 0xaf, (byte) 0x92, (byte) 0xbb,
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+ (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41,
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+ 0x1f, 0x10, 0x5a, (byte) 0xd8, 0x0a, (byte) 0xc1, 0x31,
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+ (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d,
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+ 0x74, (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4,
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+ (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a, 0x0c,
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+ (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09,
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+ (byte) 0xc5, 0x6e, (byte) 0xc6, (byte) 0x84, 0x18, (byte) 0xf0,
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+ 0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79,
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+ (byte) 0xee, 0x5f, 0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48 };
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+
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+ public uint[] FK = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc };
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+
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+ public uint[] CK = { 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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+
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+ private long sm4Lt(long ka)
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+ {
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+ long bb = 0L;
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+ long c = 0L;
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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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+ bb = GET_ULONG_BE(b, 0);
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+ 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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+
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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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+
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+ private long sm4CalciRK(long ka)
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+ {
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+ long bb = 0L;
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+ long rk = 0L;
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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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+ bb = GET_ULONG_BE(b, 0);
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+ rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
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+ return rk;
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+ }
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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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+
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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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+
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+ private 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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+
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+ byte[] ret = (byte[])null;
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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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+ Buffer.BlockCopy(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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+ Buffer.BlockCopy(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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+
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+ public void sm4_setkey_enc(SM4Context 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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+
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+ public void sm4_setkey_dec(SM4Context ctx, byte[] key)
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+ {
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+ int i = 0;
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+ ctx.mode = SM4_DECRYPT;
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+ sm4_setkey(ctx.sk, key);
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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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+
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+ public byte[] sm4_crypt_ecb(SM4Context 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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+
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+ int length = input.Length;
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+ byte[] bins = new byte[length];
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+ Buffer.BlockCopy(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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+ Buffer.BlockCopy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
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+ sm4_one_round(ctx.sk, inBytes, outBytes);
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+ Buffer.BlockCopy(outBytes, 0, bous, i * 16, length > 16 ? 16 : length);
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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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+ bous = padding(bous, SM4_DECRYPT);
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+ }
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+ return bous;
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+ }
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+
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+ public byte[] sm4_crypt_cbc(SM4Context 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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+
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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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+ Buffer.BlockCopy(input, 0, bins, 0, length);
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+ byte[] bous = null;
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+ List<byte> 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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+
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+ Buffer.BlockCopy(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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+ Buffer.BlockCopy(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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+
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+ Buffer.BlockCopy(bins, i * 16, inBytes, 0, length > 16 ? 16 : length);
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+ Buffer.BlockCopy(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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+ Buffer.BlockCopy(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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+ }
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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(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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+}
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