X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0a886a1d1bbe91af3e9e0a6a190a1af026faa589..41611deef90f78c2ee5d20d78e9bd1c7f64d964b:/common/tea.c

diff --git a/common/tea.c b/common/tea.c
index d0bea1c0..616b4043 100644
--- a/common/tea.c
+++ b/common/tea.c
@@ -10,8 +10,6 @@
 #define ROUNDS 32
 #define DELTA  0x9E3779B9
 #define SUM    0xC6EF3720
-#define SWAPENDIAN(x)\
-  (x = (x >> 8 & 0xff00ff) | (x & 0xff00ff) << 8, x = x >> 16 | x << 16)
 
 void tea_encrypt(uint8_t *v, uint8_t *key) {
 
@@ -28,13 +26,6 @@ void tea_encrypt(uint8_t *v, uint8_t *key) {
 	//input
 	y = bytes_to_num(v, 4);
 	z = bytes_to_num(v+4, 4);
-	
-	// SWAPENDIAN(a);
-	// SWAPENDIAN(b);
-	// SWAPENDIAN(c);
-	// SWAPENDIAN(d);
-	// SWAPENDIAN(y);
-	// SWAPENDIAN(z);
 		
 	while ( n-- > 0 ) {
 		sum += DELTA;
@@ -42,9 +33,6 @@ void tea_encrypt(uint8_t *v, uint8_t *key) {
 		z += ((y << 4) + c) ^ (y + sum) ^ ((y >> 5) + d);
 	}
 
-	// SWAPENDIAN(y);
-	// SWAPENDIAN(z);
-
 	num_to_bytes(y, 4, v);
 	num_to_bytes(z, 4, v+4);
 }
@@ -65,22 +53,12 @@ void tea_decrypt(uint8_t *v, uint8_t *key) {
 	y = bytes_to_num(v, 4);
 	z = bytes_to_num(v+4, 4);
 
-	// SWAPENDIAN(a);
-	// SWAPENDIAN(b);
-	// SWAPENDIAN(c);
-	// SWAPENDIAN(d);
-	// SWAPENDIAN(y);
-	// SWAPENDIAN(z);
-	
 	/* sum = delta<<5, in general sum = delta * n */
 	while ( n-- > 0 ) {
 		z -= ((y << 4) + c) ^ (y + sum) ^ ((y >> 5) + d);
 		y -= ((z << 4) + a) ^ (z + sum) ^ ((z >> 5) + b);
 		sum -= DELTA;
 	}
-
-	// SWAPENDIAN(y);
-	// SWAPENDIAN(z);
 	num_to_bytes(y, 4, v);
 	num_to_bytes(z, 4, v+4);
 }