diff options
Diffstat (limited to 'src/mdfour.c')
| -rw-r--r-- | src/mdfour.c | 97 |
1 files changed, 49 insertions, 48 deletions
diff --git a/src/mdfour.c b/src/mdfour.c index 9706dbb..1fba891 100644 --- a/src/mdfour.c +++ b/src/mdfour.c @@ -59,40 +59,40 @@ static void mdfour64(uint32_t *M) int j; uint32_t AA, BB, CC, DD; uint32_t X[16]; - uint32_t A,B,C,D; + uint32_t A, B, C, D; - for (j=0;j<16;j++) + for (j = 0; j < 16; j++) X[j] = M[j]; A = m->A; B = m->B; C = m->C; D = m->D; AA = A; BB = B; CC = C; DD = D; - ROUND1(A,B,C,D, 0, 3); ROUND1(D,A,B,C, 1, 7); - ROUND1(C,D,A,B, 2, 11); ROUND1(B,C,D,A, 3, 19); - ROUND1(A,B,C,D, 4, 3); ROUND1(D,A,B,C, 5, 7); - ROUND1(C,D,A,B, 6, 11); ROUND1(B,C,D,A, 7, 19); - ROUND1(A,B,C,D, 8, 3); ROUND1(D,A,B,C, 9, 7); - ROUND1(C,D,A,B, 10, 11); ROUND1(B,C,D,A, 11, 19); - ROUND1(A,B,C,D, 12, 3); ROUND1(D,A,B,C, 13, 7); - ROUND1(C,D,A,B, 14, 11); ROUND1(B,C,D,A, 15, 19); - - ROUND2(A,B,C,D, 0, 3); ROUND2(D,A,B,C, 4, 5); - ROUND2(C,D,A,B, 8, 9); ROUND2(B,C,D,A, 12, 13); - ROUND2(A,B,C,D, 1, 3); ROUND2(D,A,B,C, 5, 5); - ROUND2(C,D,A,B, 9, 9); ROUND2(B,C,D,A, 13, 13); - ROUND2(A,B,C,D, 2, 3); ROUND2(D,A,B,C, 6, 5); - ROUND2(C,D,A,B, 10, 9); ROUND2(B,C,D,A, 14, 13); - ROUND2(A,B,C,D, 3, 3); ROUND2(D,A,B,C, 7, 5); - ROUND2(C,D,A,B, 11, 9); ROUND2(B,C,D,A, 15, 13); - - ROUND3(A,B,C,D, 0, 3); ROUND3(D,A,B,C, 8, 9); - ROUND3(C,D,A,B, 4, 11); ROUND3(B,C,D,A, 12, 15); - ROUND3(A,B,C,D, 2, 3); ROUND3(D,A,B,C, 10, 9); - ROUND3(C,D,A,B, 6, 11); ROUND3(B,C,D,A, 14, 15); - ROUND3(A,B,C,D, 1, 3); ROUND3(D,A,B,C, 9, 9); - ROUND3(C,D,A,B, 5, 11); ROUND3(B,C,D,A, 13, 15); - ROUND3(A,B,C,D, 3, 3); ROUND3(D,A,B,C, 11, 9); - ROUND3(C,D,A,B, 7, 11); ROUND3(B,C,D,A, 15, 15); + ROUND1(A, B, C, D, 0, 3); ROUND1(D, A, B, C, 1, 7); + ROUND1(C, D, A, B, 2, 11); ROUND1(B, C, D, A, 3, 19); + ROUND1(A, B, C, D, 4, 3); ROUND1(D, A, B, C, 5, 7); + ROUND1(C, D, A, B, 6, 11); ROUND1(B, C, D, A, 7, 19); + ROUND1(A, B, C, D, 8, 3); ROUND1(D, A, B, C, 9, 7); + ROUND1(C, D, A, B, 10, 11); ROUND1(B, C, D, A, 11, 19); + ROUND1(A, B, C, D, 12, 3); ROUND1(D, A, B, C, 13, 7); + ROUND1(C, D, A, B, 14, 11); ROUND1(B, C, D, A, 15, 19); + + ROUND2(A, B, C, D, 0, 3); ROUND2(D, A, B, C, 4, 5); + ROUND2(C, D, A, B, 8, 9); ROUND2(B, C, D, A, 12, 13); + ROUND2(A, B, C, D, 1, 3); ROUND2(D, A, B, C, 5, 5); + ROUND2(C, D, A, B, 9, 9); ROUND2(B, C, D, A, 13, 13); + ROUND2(A, B, C, D, 2, 3); ROUND2(D, A, B, C, 6, 5); + ROUND2(C, D, A, B, 10, 9); ROUND2(B, C, D, A, 14, 13); + ROUND2(A, B, C, D, 3, 3); ROUND2(D, A, B, C, 7, 5); + ROUND2(C, D, A, B, 11, 9); ROUND2(B, C, D, A, 15, 13); + + ROUND3(A, B, C, D, 0, 3); ROUND3(D, A, B, C, 8, 9); + ROUND3(C, D, A, B, 4, 11); ROUND3(B, C, D, A, 12, 15); + ROUND3(A, B, C, D, 2, 3); ROUND3(D, A, B, C, 10, 9); + ROUND3(C, D, A, B, 6, 11); ROUND3(B, C, D, A, 14, 15); + ROUND3(A, B, C, D, 1, 3); ROUND3(D, A, B, C, 9, 9); + ROUND3(C, D, A, B, 5, 11); ROUND3(B, C, D, A, 13, 15); + ROUND3(A, B, C, D, 3, 3); ROUND3(D, A, B, C, 11, 9); + ROUND3(C, D, A, B, 7, 11); ROUND3(B, C, D, A, 15, 15); A += AA; B += BB; C += CC; D += DD; @@ -101,7 +101,7 @@ static void mdfour64(uint32_t *M) C &= 0xFFFFFFFF; D &= 0xFFFFFFFF; #endif - for (j=0;j<16;j++) + for (j = 0; j < 16; j++) X[j] = 0; m->A = A; m->B = B; m->C = C; m->D = D; @@ -111,17 +111,17 @@ static void copy64(uint32_t *M, uint8_t *in) { int i; - for (i=0;i<16;i++) - M[i] = (in[i*4+3]<<24) | (in[i*4+2]<<16) | - (in[i*4+1]<<8) | (in[i*4+0]<<0); + for (i = 0; i < 16; i++) + M[i] = (in[i * 4 + 3] << 24) | (in[i * 4 + 2] << 16) | + (in[i * 4 + 1] << 8) | (in[i * 4 + 0] << 0); } -static void copy4(uint8_t *out,uint32_t x) +static void copy4(uint8_t *out, uint32_t x) { - out[0] = x&0xFF; - out[1] = (x>>8)&0xFF; - out[2] = (x>>16)&0xFF; - out[3] = (x>>24)&0xFF; + out[0] = x & 0xFF; + out[1] = (x >> 8) & 0xFF; + out[2] = (x >> 16) & 0xFF; + out[3] = (x >> 24) & 0xFF; } void mdfour_begin(struct mdfour *md) @@ -149,14 +149,14 @@ static void mdfour_tail(uint8_t *in, size_t n) buf[n] = 0x80; if (n <= 55) { - copy4(buf+56, b); + copy4(buf + 56, b); copy64(M, buf); mdfour64(M); } else { - copy4(buf+120, b); + copy4(buf + 120, b); copy64(M, buf); mdfour64(M); - copy64(M, buf+64); + copy64(M, buf + 64); mdfour64(M); } } @@ -186,22 +186,23 @@ void mdfour_result(struct mdfour *md, uint8_t *out) m = md; copy4(out, m->A); - copy4(out+4, m->B); - copy4(out+8, m->C); - copy4(out+12, m->D); + copy4(out + 4, m->B); + copy4(out + 8, m->C); + copy4(out + 12, m->D); } //=================================================================== -uint32_t Com_BlockChecksum( void *buffer, size_t len ) { +uint32_t Com_BlockChecksum(void *buffer, size_t len) +{ uint32_t digest[4]; uint32_t val; struct mdfour md; - mdfour_begin( &md ); - mdfour_update( &md, ( uint8_t * )buffer, len ); - mdfour_result( &md, ( uint8_t * )digest ); - + mdfour_begin(&md); + mdfour_update(&md, (uint8_t *)buffer, len); + mdfour_result(&md, (uint8_t *)digest); + val = digest[0] ^ digest[1] ^ digest[2] ^ digest[3]; return val; |