228 lines
8.4 KiB
C++
228 lines
8.4 KiB
C++
#include<hgl/util/hash/Hash.h>
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#include<hgl/type/DataType.h>
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namespace hgl
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{
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namespace util
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{
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namespace
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{
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/* Constants for MD4Transform routine. */
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#define S11 3
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#define S12 7
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#define S13 11
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#define S14 19
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#define S21 3
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#define S22 5
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#define S23 9
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#define S24 13
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#define S31 3
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#define S32 9
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#define S33 11
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#define S34 15
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/* F, G and H are basic MD4 functions. */
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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/* ROTATE_LEFT rotates x left n bits. */
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG and HH are transformations for rounds 1, 2 and 3 */
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/* Rotation is separate from addition to prevent recomputation */
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#define FF(a, b, c, d, x, s) { \
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(a) += F ((b), (c), (d)) + (x); \
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(a) = ROTATE_LEFT ((a), (s)); \
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}
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#define GG(a, b, c, d, x, s) { \
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(a) += G ((b), (c), (d)) + (x) + (uint32)0x5a827999; \
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(a) = ROTATE_LEFT ((a), (s)); \
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}
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#define HH(a, b, c, d, x, s) { \
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(a) += H ((b), (c), (d)) + (x) + (uint32)0x6ed9eba1; \
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(a) = ROTATE_LEFT ((a), (s)); \
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}
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void md4_encode(unsigned char* output, const uint32* input, unsigned int len)
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{
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unsigned int i, j;
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for (i = 0, j = 0; j < len; i++, j += 4)
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{
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output[j] = (unsigned char)(input[i] & 0xff);
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output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
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output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
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output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
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}
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}
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void md4_decode(uint32* output, const unsigned char* input, unsigned int len)
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{
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unsigned int i, j;
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for (i = 0, j = 0; j < len; i++, j += 4)
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output[i] = ((uint32)input[j]) | (((uint32)input[j+1]) << 8) |
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(((uint32)input[j+2]) << 16) | (((uint32)input[j+3]) << 24);
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}
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void md4_transform (uint32 state[4], const unsigned char block[64])
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{
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uint32 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
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md4_decode(x, block, 64);
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/* Round 1 */
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FF (a, b, c, d, x[ 0], S11); /* 1 */
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FF (d, a, b, c, x[ 1], S12); /* 2 */
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FF (c, d, a, b, x[ 2], S13); /* 3 */
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FF (b, c, d, a, x[ 3], S14); /* 4 */
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FF (a, b, c, d, x[ 4], S11); /* 5 */
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FF (d, a, b, c, x[ 5], S12); /* 6 */
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FF (c, d, a, b, x[ 6], S13); /* 7 */
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FF (b, c, d, a, x[ 7], S14); /* 8 */
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FF (a, b, c, d, x[ 8], S11); /* 9 */
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FF (d, a, b, c, x[ 9], S12); /* 10 */
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FF (c, d, a, b, x[10], S13); /* 11 */
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FF (b, c, d, a, x[11], S14); /* 12 */
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FF (a, b, c, d, x[12], S11); /* 13 */
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FF (d, a, b, c, x[13], S12); /* 14 */
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FF (c, d, a, b, x[14], S13); /* 15 */
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FF (b, c, d, a, x[15], S14); /* 16 */
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/* Round 2 */
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GG (a, b, c, d, x[ 0], S21); /* 17 */
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GG (d, a, b, c, x[ 4], S22); /* 18 */
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GG (c, d, a, b, x[ 8], S23); /* 19 */
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GG (b, c, d, a, x[12], S24); /* 20 */
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GG (a, b, c, d, x[ 1], S21); /* 21 */
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GG (d, a, b, c, x[ 5], S22); /* 22 */
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GG (c, d, a, b, x[ 9], S23); /* 23 */
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GG (b, c, d, a, x[13], S24); /* 24 */
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GG (a, b, c, d, x[ 2], S21); /* 25 */
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GG (d, a, b, c, x[ 6], S22); /* 26 */
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GG (c, d, a, b, x[10], S23); /* 27 */
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GG (b, c, d, a, x[14], S24); /* 28 */
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GG (a, b, c, d, x[ 3], S21); /* 29 */
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GG (d, a, b, c, x[ 7], S22); /* 30 */
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GG (c, d, a, b, x[11], S23); /* 31 */
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GG (b, c, d, a, x[15], S24); /* 32 */
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/* Round 3 */
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HH (a, b, c, d, x[ 0], S31); /* 33 */
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HH (d, a, b, c, x[ 8], S32); /* 34 */
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HH (c, d, a, b, x[ 4], S33); /* 35 */
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HH (b, c, d, a, x[12], S34); /* 36 */
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HH (a, b, c, d, x[ 2], S31); /* 37 */
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HH (d, a, b, c, x[10], S32); /* 38 */
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HH (c, d, a, b, x[ 6], S33); /* 39 */
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HH (b, c, d, a, x[14], S34); /* 40 */
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HH (a, b, c, d, x[ 1], S31); /* 41 */
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HH (d, a, b, c, x[ 9], S32); /* 42 */
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HH (c, d, a, b, x[ 5], S33); /* 43 */
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HH (b, c, d, a, x[13], S34); /* 44 */
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HH (a, b, c, d, x[ 3], S31); /* 45 */
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HH (d, a, b, c, x[11], S32); /* 46 */
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HH (c, d, a, b, x[ 7], S33); /* 47 */
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HH (b, c, d, a, x[15], S34); /* 48 */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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/* Zeroize sensitive information. */
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memset(x, 0, sizeof(x));
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}
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}//namespace
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class MD4:public Hash
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{
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enum
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{
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BLOCK_SIZE = 64,
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DIGEST_SIZE = 16
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};
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uint32 state[4]; // state (ABCD)
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uint32 count[2]; // number of bits, modulo 2^64 (lsb first)
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uchar buffer[64]; // input buffer
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public:
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void GetName(UTF8String &str)const override{str=U8_TEXT("MD4");}
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void GetName(UTF16String &str)const override{str=U16_TEXT("MD4");}
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const int GetHashBytes()const override{return DIGEST_SIZE;}
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void Init()override
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{
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count[0] = count[1] = 0;
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state[0] = 0x67452301;
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state[1] = 0xefcdab89;
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state[2] = 0x98badcfe;
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state[3] = 0x10325476;
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}
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void Update(const void *input,uint inputLen)override
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{
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unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
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index = (unsigned int)((count[0] >> 3) & 0x3F);
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/* Update number of bits */
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if ((count[0] += ((uint32) inputLen << 3)) < ((uint32) inputLen << 3))
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count[1]++;
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count[1] += ((uint32) inputLen >> 29);
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partLen = 64 - index;
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/* Transform as many times as possible. */
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if (inputLen >= partLen)
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{
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memcpy(&buffer[index], input, partLen);
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md4_transform(state, buffer);
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for (i = partLen; i + 63 < inputLen; i += 64)
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md4_transform(state, ((uchar *)input)+i);
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index = 0;
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}
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else i = 0;
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/* Buffer remaining input */
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memcpy(&buffer[index], ((uchar *)input)+i, inputLen-i);
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}
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void Final(void *digest)override
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{
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static const unsigned char PADDING[64] =
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{
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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unsigned char bits[8];
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unsigned int index, padLen;
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/* Save number of bits */
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md4_encode(bits, count, 8);
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/* Pad out to 56 mod 64. */
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index = (unsigned int)((count[0] >> 3) & 0x3f);
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padLen = (index < 56) ? (56 - index) : (120 - index);
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Update(PADDING, padLen);
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/* Append length (before padding) */
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Update(bits, 8);
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/* Store state in digest */
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md4_encode((uchar *)digest, state, 16);
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}
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};//class MD4
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Hash *CreateMD4Hash(){return(new MD4);}
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}//namespace util
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}//namespace hgl
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