X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/8de330a38717f8f808e8aa88a5f4391c310e7fd6..a7f8404ecdad8cc94f20f6a599131535d5c856ef:/lib/mdfour.c

diff --git a/lib/mdfour.c b/lib/mdfour.c
index 48dfc78f..19f2bb7c 100644
--- a/lib/mdfour.c
+++ b/lib/mdfour.c
@@ -28,42 +28,25 @@
 
 static struct mdfour *m;
 
-static uint32 F(uint32 X, uint32 Y, uint32 Z)
-{
-	return (X&Y) | ((~X)&Z);
-}
-
-static uint32 G(uint32 X, uint32 Y, uint32 Z)
-{
-	return (X&Y) | (X&Z) | (Y&Z); 
-}
+typedef unsigned long long uint64;
 
-static uint32 H(uint32 X, uint32 Y, uint32 Z)
-{
-	return X^Y^Z;
-}
+#define MASK32 (0xffffffff)
 
-static uint32 lshift(uint32 x, int s)
-{
-	x &= 0xFFFFFFFF;
-	return ((x<<s)&0xFFFFFFFF) | (x>>(32-s));
-}
+#define F(X,Y,Z) ((((X)&(Y)) | ((~(X))&(Z))))
+#define G(X,Y,Z) ((((X)&(Y)) | ((X)&(Z)) | ((Y)&(Z))))
+#define H(X,Y,Z) (((X)^(Y)^(Z)))
+#define lshift(x,s) (((((x)<<(s))&MASK32) | (((x)>>(32-(s)))&MASK32)))
 
-#define ROUND1(a,b,c,d,k,s) a = lshift(a + F(b,c,d) + X[k], s)
-#define ROUND2(a,b,c,d,k,s) a = lshift(a + G(b,c,d) + X[k] + (uint32)0x5A827999,s)
-#define ROUND3(a,b,c,d,k,s) a = lshift(a + H(b,c,d) + X[k] + (uint32)0x6ED9EBA1,s)
+#define ROUND1(a,b,c,d,k,s) a = lshift((a + F(b,c,d) + M[k])&MASK32, s)
+#define ROUND2(a,b,c,d,k,s) a = lshift((a + G(b,c,d) + M[k] + 0x5A827999)&MASK32,s)
+#define ROUND3(a,b,c,d,k,s) a = lshift((a + H(b,c,d) + M[k] + 0x6ED9EBA1)&MASK32,s)
 
 /* this applies md4 to 64 byte chunks */
 static void mdfour64(uint32 *M)
 {
-	int j;
 	uint32 AA, BB, CC, DD;
-	uint32 X[16];
 	uint32 A,B,C,D;
 
-	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;
 
@@ -76,6 +59,7 @@ static void mdfour64(uint32 *M)
         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);  
@@ -94,13 +78,11 @@ static void mdfour64(uint32 *M)
         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;
+	A += AA; B += BB; 
+	C += CC; D += DD;
 	
-	A &= 0xFFFFFFFF; B &= 0xFFFFFFFF;
-	C &= 0xFFFFFFFF; D &= 0xFFFFFFFF;
-
-	for (j=0;j<16;j++)
-		X[j] = 0;
+	A &= MASK32; B &= MASK32; 
+	C &= MASK32; D &= MASK32;
 
 	m->A = A; m->B = B; m->C = C; m->D = D;
 }
@@ -157,9 +139,6 @@ static void mdfour_tail(unsigned char *in, int n)
 		copy64(M, buf+64);
 		mdfour64(M);
 	}
-
-	memset(buf, 0, 128);
-	copy64(M, buf);	
 }
 
 void mdfour_update(struct mdfour *md, unsigned char *in, int n)
@@ -206,8 +185,8 @@ static void file_checksum1(char *fname)
 {
 	int fd, i;
 	struct mdfour md;
-	unsigned char buf[64], sum[16];
-
+	unsigned char buf[64*1024], sum[16];
+	
 	fd = open(fname,O_RDONLY);
 	if (fd == -1) {
 		perror("fname");
@@ -231,6 +210,7 @@ static void file_checksum1(char *fname)
 	printf("\n");
 }
 
+#if 0
 #include "../md4.h"
 
 static void file_checksum2(char *fname)
@@ -265,11 +245,14 @@ static void file_checksum2(char *fname)
 		printf("%02X", sum[i]);
 	printf("\n");
 }
+#endif
 
  int main(int argc, char *argv[])
 {
 	file_checksum1(argv[1]);
+#if 0
 	file_checksum2(argv[1]);
+#endif
 	return 0;
 }
 #endif