rijndael-alg-fst.c

这个极其小巧（9k）的加密程序对文件进行加密及解密的速度与资源管理器拷贝文件的速度一样快。因为速度快

    0x984af104U, 0xdaf741ecU, 0x500e7fcdU, 0xf62f1791U,
    0xd68d764dU, 0xb04d43efU, 0x4d54ccaaU, 0x04dfe496U,
    0xb5e39ed1U, 0x881b4c6aU, 0x1fb8c12cU, 0x517f4665U,
    0xea049d5eU, 0x355d018cU, 0x7473fa87U, 0x412efb0bU,
    0x1d5ab367U, 0xd25292dbU, 0x5633e910U, 0x47136dd6U,
    0x618c9ad7U, 0x0c7a37a1U, 0x148e59f8U, 0x3c89eb13U,
    0x27eecea9U, 0xc935b761U, 0xe5ede11cU, 0xb13c7a47U,
    0xdf599cd2U, 0x733f55f2U, 0xce791814U, 0x37bf73c7U,
    0xcdea53f7U, 0xaa5b5ffdU, 0x6f14df3dU, 0xdb867844U,
    0xf381caafU, 0xc43eb968U, 0x342c3824U, 0x405fc2a3U,
    0xc372161dU, 0x250cbce2U, 0x498b283cU, 0x9541ff0dU,
    0x017139a8U, 0xb3de080cU, 0xe49cd8b4U, 0xc1906456U,
    0x84617bcbU, 0xb670d532U, 0x5c74486cU, 0x5742d0b8U,
};
static const u32 Td3[256] = {
    0xf4a75051U, 0x4165537eU, 0x17a4c31aU, 0x275e963aU,
    0xab6bcb3bU, 0x9d45f11fU, 0xfa58abacU, 0xe303934bU,
    0x30fa5520U, 0x766df6adU, 0xcc769188U, 0x024c25f5U,
    0xe5d7fc4fU, 0x2acbd7c5U, 0x35448026U, 0x62a38fb5U,
    0xb15a49deU, 0xba1b6725U, 0xea0e9845U, 0xfec0e15dU,
    0x2f7502c3U, 0x4cf01281U, 0x4697a38dU, 0xd3f9c66bU,
    0x8f5fe703U, 0x929c9515U, 0x6d7aebbfU, 0x5259da95U,
    0xbe832dd4U, 0x7421d358U, 0xe0692949U, 0xc9c8448eU,
    0xc2896a75U, 0x8e7978f4U, 0x583e6b99U, 0xb971dd27U,
    0xe14fb6beU, 0x88ad17f0U, 0x20ac66c9U, 0xce3ab47dU,
    0xdf4a1863U, 0x1a3182e5U, 0x51336097U, 0x537f4562U,
    0x6477e0b1U, 0x6bae84bbU, 0x81a01cfeU, 0x082b94f9U,
    0x48685870U, 0x45fd198fU, 0xde6c8794U, 0x7bf8b752U,
    0x73d323abU, 0x4b02e272U, 0x1f8f57e3U, 0x55ab2a66U,
    0xeb2807b2U, 0xb5c2032fU, 0xc57b9a86U, 0x3708a5d3U,
    0x2887f230U, 0xbfa5b223U, 0x036aba02U, 0x16825cedU,
    0xcf1c2b8aU, 0x79b492a7U, 0x07f2f0f3U, 0x69e2a14eU,
    0xdaf4cd65U, 0x05bed506U, 0x34621fd1U, 0xa6fe8ac4U,
    0x2e539d34U, 0xf355a0a2U, 0x8ae13205U, 0xf6eb75a4U,
    0x83ec390bU, 0x60efaa40U, 0x719f065eU, 0x6e1051bdU,
    0x218af93eU, 0xdd063d96U, 0x3e05aeddU, 0xe6bd464dU,
    0x548db591U, 0xc45d0571U, 0x06d46f04U, 0x5015ff60U,
    0x98fb2419U, 0xbde997d6U, 0x4043cc89U, 0xd99e7767U,
    0xe842bdb0U, 0x898b8807U, 0x195b38e7U, 0xc8eedb79U,
    0x7c0a47a1U, 0x420fe97cU, 0x841ec9f8U, 0x00000000U,
    0x80868309U, 0x2bed4832U, 0x1170ac1eU, 0x5a724e6cU,
    0x0efffbfdU, 0x8538560fU, 0xaed51e3dU, 0x2d392736U,
    0x0fd9640aU, 0x5ca62168U, 0x5b54d19bU, 0x362e3a24U,
    0x0a67b10cU, 0x57e70f93U, 0xee96d2b4U, 0x9b919e1bU,
    0xc0c54f80U, 0xdc20a261U, 0x774b695aU, 0x121a161cU,
    0x93ba0ae2U, 0xa02ae5c0U, 0x22e0433cU, 0x1b171d12U,
    0x090d0b0eU, 0x8bc7adf2U, 0xb6a8b92dU, 0x1ea9c814U,
    0xf1198557U, 0x75074cafU, 0x99ddbbeeU, 0x7f60fda3U,
    0x01269ff7U, 0x72f5bc5cU, 0x663bc544U, 0xfb7e345bU,
    0x4329768bU, 0x23c6dccbU, 0xedfc68b6U, 0xe4f163b8U,
    0x31dccad7U, 0x63851042U, 0x97224013U, 0xc6112084U,
    0x4a247d85U, 0xbb3df8d2U, 0xf93211aeU, 0x29a16dc7U,
    0x9e2f4b1dU, 0xb230f3dcU, 0x8652ec0dU, 0xc1e3d077U,
    0xb3166c2bU, 0x70b999a9U, 0x9448fa11U, 0xe9642247U,
    0xfc8cc4a8U, 0xf03f1aa0U, 0x7d2cd856U, 0x3390ef22U,
    0x494ec787U, 0x38d1c1d9U, 0xcaa2fe8cU, 0xd40b3698U,
    0xf581cfa6U, 0x7ade28a5U, 0xb78e26daU, 0xadbfa43fU,
    0x3a9de42cU, 0x78920d50U, 0x5fcc9b6aU, 0x7e466254U,
    0x8d13c2f6U, 0xd8b8e890U, 0x39f75e2eU, 0xc3aff582U,
    0x5d80be9fU, 0xd0937c69U, 0xd52da96fU, 0x2512b3cfU,
    0xac993bc8U, 0x187da710U, 0x9c636ee8U, 0x3bbb7bdbU,
    0x267809cdU, 0x5918f46eU, 0x9ab701ecU, 0x4f9aa883U,
    0x956e65e6U, 0xffe67eaaU, 0xbccf0821U, 0x15e8e6efU,
    0xe79bd9baU, 0x6f36ce4aU, 0x9f09d4eaU, 0xb07cd629U,
    0xa4b2af31U, 0x3f23312aU, 0xa59430c6U, 0xa266c035U,
    0x4ebc3774U, 0x82caa6fcU, 0x90d0b0e0U, 0xa7d81533U,
    0x04984af1U, 0xecdaf741U, 0xcd500e7fU, 0x91f62f17U,
    0x4dd68d76U, 0xefb04d43U, 0xaa4d54ccU, 0x9604dfe4U,
    0xd1b5e39eU, 0x6a881b4cU, 0x2c1fb8c1U, 0x65517f46U,
    0x5eea049dU, 0x8c355d01U, 0x877473faU, 0x0b412efbU,
    0x671d5ab3U, 0xdbd25292U, 0x105633e9U, 0xd647136dU,
    0xd7618c9aU, 0xa10c7a37U, 0xf8148e59U, 0x133c89ebU,
    0xa927eeceU, 0x61c935b7U, 0x1ce5ede1U, 0x47b13c7aU,
    0xd2df599cU, 0xf2733f55U, 0x14ce7918U, 0xc737bf73U,
    0xf7cdea53U, 0xfdaa5b5fU, 0x3d6f14dfU, 0x44db8678U,
    0xaff381caU, 0x68c43eb9U, 0x24342c38U, 0xa3405fc2U,
    0x1dc37216U, 0xe2250cbcU, 0x3c498b28U, 0x0d9541ffU,
    0xa8017139U, 0x0cb3de08U, 0xb4e49cd8U, 0x56c19064U,
    0xcb84617bU, 0x32b670d5U, 0x6c5c7448U, 0xb85742d0U,
};
static const u32 Td4[256] = {
    0x52525252U, 0x09090909U, 0x6a6a6a6aU, 0xd5d5d5d5U,
    0x30303030U, 0x36363636U, 0xa5a5a5a5U, 0x38383838U,
    0xbfbfbfbfU, 0x40404040U, 0xa3a3a3a3U, 0x9e9e9e9eU,
    0x81818181U, 0xf3f3f3f3U, 0xd7d7d7d7U, 0xfbfbfbfbU,
    0x7c7c7c7cU, 0xe3e3e3e3U, 0x39393939U, 0x82828282U,
    0x9b9b9b9bU, 0x2f2f2f2fU, 0xffffffffU, 0x87878787U,
    0x34343434U, 0x8e8e8e8eU, 0x43434343U, 0x44444444U,
    0xc4c4c4c4U, 0xdedededeU, 0xe9e9e9e9U, 0xcbcbcbcbU,
    0x54545454U, 0x7b7b7b7bU, 0x94949494U, 0x32323232U,
    0xa6a6a6a6U, 0xc2c2c2c2U, 0x23232323U, 0x3d3d3d3dU,
    0xeeeeeeeeU, 0x4c4c4c4cU, 0x95959595U, 0x0b0b0b0bU,
    0x42424242U, 0xfafafafaU, 0xc3c3c3c3U, 0x4e4e4e4eU,
    0x08080808U, 0x2e2e2e2eU, 0xa1a1a1a1U, 0x66666666U,
    0x28282828U, 0xd9d9d9d9U, 0x24242424U, 0xb2b2b2b2U,
    0x76767676U, 0x5b5b5b5bU, 0xa2a2a2a2U, 0x49494949U,
    0x6d6d6d6dU, 0x8b8b8b8bU, 0xd1d1d1d1U, 0x25252525U,
    0x72727272U, 0xf8f8f8f8U, 0xf6f6f6f6U, 0x64646464U,
    0x86868686U, 0x68686868U, 0x98989898U, 0x16161616U,
    0xd4d4d4d4U, 0xa4a4a4a4U, 0x5c5c5c5cU, 0xccccccccU,
    0x5d5d5d5dU, 0x65656565U, 0xb6b6b6b6U, 0x92929292U,
    0x6c6c6c6cU, 0x70707070U, 0x48484848U, 0x50505050U,
    0xfdfdfdfdU, 0xededededU, 0xb9b9b9b9U, 0xdadadadaU,
    0x5e5e5e5eU, 0x15151515U, 0x46464646U, 0x57575757U,
    0xa7a7a7a7U, 0x8d8d8d8dU, 0x9d9d9d9dU, 0x84848484U,
    0x90909090U, 0xd8d8d8d8U, 0xababababU, 0x00000000U,
    0x8c8c8c8cU, 0xbcbcbcbcU, 0xd3d3d3d3U, 0x0a0a0a0aU,
    0xf7f7f7f7U, 0xe4e4e4e4U, 0x58585858U, 0x05050505U,
    0xb8b8b8b8U, 0xb3b3b3b3U, 0x45454545U, 0x06060606U,
    0xd0d0d0d0U, 0x2c2c2c2cU, 0x1e1e1e1eU, 0x8f8f8f8fU,
    0xcacacacaU, 0x3f3f3f3fU, 0x0f0f0f0fU, 0x02020202U,
    0xc1c1c1c1U, 0xafafafafU, 0xbdbdbdbdU, 0x03030303U,
    0x01010101U, 0x13131313U, 0x8a8a8a8aU, 0x6b6b6b6bU,
    0x3a3a3a3aU, 0x91919191U, 0x11111111U, 0x41414141U,
    0x4f4f4f4fU, 0x67676767U, 0xdcdcdcdcU, 0xeaeaeaeaU,
    0x97979797U, 0xf2f2f2f2U, 0xcfcfcfcfU, 0xcecececeU,
    0xf0f0f0f0U, 0xb4b4b4b4U, 0xe6e6e6e6U, 0x73737373U,
    0x96969696U, 0xacacacacU, 0x74747474U, 0x22222222U,
    0xe7e7e7e7U, 0xadadadadU, 0x35353535U, 0x85858585U,
    0xe2e2e2e2U, 0xf9f9f9f9U, 0x37373737U, 0xe8e8e8e8U,
    0x1c1c1c1cU, 0x75757575U, 0xdfdfdfdfU, 0x6e6e6e6eU,
    0x47474747U, 0xf1f1f1f1U, 0x1a1a1a1aU, 0x71717171U,
    0x1d1d1d1dU, 0x29292929U, 0xc5c5c5c5U, 0x89898989U,
    0x6f6f6f6fU, 0xb7b7b7b7U, 0x62626262U, 0x0e0e0e0eU,
    0xaaaaaaaaU, 0x18181818U, 0xbebebebeU, 0x1b1b1b1bU,
    0xfcfcfcfcU, 0x56565656U, 0x3e3e3e3eU, 0x4b4b4b4bU,
    0xc6c6c6c6U, 0xd2d2d2d2U, 0x79797979U, 0x20202020U,
    0x9a9a9a9aU, 0xdbdbdbdbU, 0xc0c0c0c0U, 0xfefefefeU,
    0x78787878U, 0xcdcdcdcdU, 0x5a5a5a5aU, 0xf4f4f4f4U,
    0x1f1f1f1fU, 0xddddddddU, 0xa8a8a8a8U, 0x33333333U,
    0x88888888U, 0x07070707U, 0xc7c7c7c7U, 0x31313131U,
    0xb1b1b1b1U, 0x12121212U, 0x10101010U, 0x59595959U,
    0x27272727U, 0x80808080U, 0xececececU, 0x5f5f5f5fU,
    0x60606060U, 0x51515151U, 0x7f7f7f7fU, 0xa9a9a9a9U,
    0x19191919U, 0xb5b5b5b5U, 0x4a4a4a4aU, 0x0d0d0d0dU,
    0x2d2d2d2dU, 0xe5e5e5e5U, 0x7a7a7a7aU, 0x9f9f9f9fU,
    0x93939393U, 0xc9c9c9c9U, 0x9c9c9c9cU, 0xefefefefU,
    0xa0a0a0a0U, 0xe0e0e0e0U, 0x3b3b3b3bU, 0x4d4d4d4dU,
    0xaeaeaeaeU, 0x2a2a2a2aU, 0xf5f5f5f5U, 0xb0b0b0b0U,
    0xc8c8c8c8U, 0xebebebebU, 0xbbbbbbbbU, 0x3c3c3c3cU,
    0x83838383U, 0x53535353U, 0x99999999U, 0x61616161U,
    0x17171717U, 0x2b2b2b2bU, 0x04040404U, 0x7e7e7e7eU,
    0xbabababaU, 0x77777777U, 0xd6d6d6d6U, 0x26262626U,
    0xe1e1e1e1U, 0x69696969U, 0x14141414U, 0x63636363U,
    0x55555555U, 0x21212121U, 0x0c0c0c0cU, 0x7d7d7d7dU,
};
static const u32 rcon[] = {
	0x01000000, 0x02000000, 0x04000000, 0x08000000,
	0x10000000, 0x20000000, 0x40000000, 0x80000000,
	0x1B000000, 0x36000000, /* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
};

#define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)

#ifdef _MSC_VER
#define GETU32(p) SWAP(*((u32 *)(p)))
#define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
#else
#define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ ((u32)(pt)[2] <<  8) ^ ((u32)(pt)[3]))
#define PUTU32(ct, st) { (ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); (ct)[2] = (u8)((st) >>  8); (ct)[3] = (u8)(st); }
#endif

/**
 * Expand the cipher key into the encryption key schedule.
 *
 * @return	the number of rounds for the given cipher key size.
 */
int rijndaelKeySetupEnc(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits) {
   	int i = 0;
	u32 temp;

	rk[0] = GETU32(cipherKey     );
	rk[1] = GETU32(cipherKey +  4);
	rk[2] = GETU32(cipherKey +  8);
	rk[3] = GETU32(cipherKey + 12);
	if (keyBits == 128) {
		for (;;) {
			temp  = rk[3];
			rk[4] = rk[0] ^
				(Te4[(temp >> 16) & 0xff] & 0xff000000) ^
				(Te4[(temp >>  8) & 0xff] & 0x00ff0000) ^
				(Te4[(temp      ) & 0xff] & 0x0000ff00) ^
				(Te4[(temp >> 24)       ] & 0x000000ff) ^
				rcon[i];
			rk[5] = rk[1] ^ rk[4];
			rk[6] = rk[2] ^ rk[5];
			rk[7] = rk[3] ^ rk[6];
			if (++i == 10) {
				return 10;
			}
			rk += 4;
		}
	}
	rk[4] = GETU32(cipherKey + 16);
	rk[5] = GETU32(cipherKey + 20);
	if (keyBits == 192) {
		for (;;) {
			temp = rk[ 5];
			rk[ 6] = rk[ 0] ^
				(Te4[(temp >> 16) & 0xff] & 0xff000000) ^
				(Te4[(temp >>  8) & 0xff] & 0x00ff0000) ^
				(Te4[(temp      ) & 0xff] & 0x0000ff00) ^
				(Te4[(temp >> 24)       ] & 0x000000ff) ^
				rcon[i];
			rk[ 7] = rk[ 1] ^ rk[ 6];
			rk[ 8] = rk[ 2] ^ rk[ 7];
			rk[ 9] = rk[ 3] ^ rk[ 8];
			if (++i == 8) {
				return 12;
			}
			rk[10] = rk[ 4] ^ rk[ 9];
			rk[11] = rk[ 5] ^ rk[10];
			rk += 6;
		}
	}
	rk[6] = GETU32(cipherKey + 24);
	rk[7] = GETU32(cipherKey + 28);
	if (keyBits == 256) {
        for (;;) {
        	temp = rk[ 7];
        	rk[ 8] = rk[ 0] ^
        		(Te4[(temp >> 16) & 0xff] & 0xff000000) ^
        		(Te4[(temp >>  8) & 0xff] & 0x00ff0000) ^
        		(Te4[(temp      ) & 0xff] & 0x0000ff00) ^
        		(Te4[(temp >> 24)       ] & 0x000000ff) ^
        		rcon[i];
        	rk[ 9] = rk[ 1] ^ rk[ 8];
        	rk[10] = rk[ 2] ^ rk[ 9];
        	rk[11] = rk[ 3] ^ rk[10];
			if (++i == 7) {
				return 14;
			}
        	temp = rk[11];
        	rk[12] = rk[ 4] ^
        		(Te4[(temp >> 24)       ] & 0xff000000) ^
        		(Te4[(temp >> 16) & 0xff] & 0x00ff0000) ^
        		(Te4[(temp >>  8) & 0xff] & 0x0000ff00) ^
        		(Te4[(temp      ) & 0xff] & 0x000000ff);
        	rk[13] = rk[ 5] ^ rk[12];
        	rk[14] = rk[ 6] ^ rk[13];
        	rk[15] = rk[ 7] ^ rk[14];

			rk += 8;
        }
	}
	return 0;
}

/**
 * Expand the cipher key into the decryption key schedule.
 *
 * @return	the number of rounds for the given cipher key size.
 */
int rijndaelKeySetupDec(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits) {
	int Nr, i, j;
	u32 temp;

	/* expand the cipher key: */
	Nr = rijndaelKeySetupEnc(rk, cipherKey, keyBits);
	/* invert the order of the round keys: */
	for (i = 0, j = 4*Nr; i < j; i += 4, j -= 4) {
		temp = rk[i    ]; rk[i    ] = rk[j    ]; rk[j    ] = temp;
		temp = rk[i + 1]; rk[i + 1] = rk[j + 1]; rk[j + 1] = temp;
		temp = rk[i + 2]; rk[i + 2] = rk[j + 2]; rk[j + 2] = temp;
		temp = rk[i + 3]; rk[i + 3] = rk[j + 3]; rk[j + 3] = temp;
	}
	/* apply the inverse MixColumn transform to all round keys but the first and the last: */
	for (i = 1; i < Nr; i++) {
		rk += 4;
		rk[0] =
			Td0[Te4[(rk[0] >> 24)       ] & 0xff] ^
			Td1[Te4[(rk[0] >> 16) & 0xff] & 0xff] ^
			Td2[Te4[(rk[0] >>  8) & 0xff] & 0xff] ^
			Td3[Te4[(rk[0]      ) & 0xff] & 0xff];
		rk[1] =
			Td0[Te4[(rk[1] >> 24)       ] & 0xff] ^
			Td1[Te4[(rk[1] >> 16) & 0xff] & 0xff] ^
			Td2[Te4[(rk[1] >>  8) & 0xff] & 0xff] ^
			Td3[Te4[(rk[1]      ) & 0xff] & 0xff];
		rk[2] =
			Td0[Te4[(rk[2] >> 24)       ] & 0xff] ^