X-Git-Url: https://git.xonotic.org/?a=blobdiff_plain;ds=sidebyside;f=hmac.c;h=af0d11968e64bca065d1212d05118a0621453792;hb=af0db9ea252f39372633225c6844350bc1f8a984;hp=372921d7a096a8786e3e652b9c988f574ace53c2;hpb=c7eea28ff1214ea7c198be1bda5638e1df314ab1;p=xonotic%2Fdarkplaces.git

diff --git a/hmac.c b/hmac.c
index 372921d7..af0d1196 100644
--- a/hmac.c
+++ b/hmac.c
@@ -1,29 +1,29 @@
 #include "quakedef.h"
 #include "hmac.h"
 
-void hmac(
+qboolean hmac(
 	hashfunc_t hfunc, int hlen, int hblock,
 	unsigned char *out,
-	unsigned char *in, int n,
-	unsigned char *key, int k
+	const unsigned char *in, int n,
+	const unsigned char *key, int k
 )
 {
-	unsigned char hashbuf[32];
-	unsigned char k_xor_ipad[128];
-	unsigned char k_xor_opad[128];
-	unsigned char catbuf[256];
+	static unsigned char hashbuf[32];
+	static unsigned char k_xor_ipad[128];
+	static unsigned char k_xor_opad[128];
+	static unsigned char catbuf[65600]; // 65535 bytes max quake packet size + 64 for the hash
 	int i;
 
 	if(sizeof(hashbuf) < (size_t) hlen)
-		Host_Error("Invalid hash function used for HMAC - too long hash length");
+		return false;
 	if(sizeof(k_xor_ipad) < (size_t) hblock)
-		Host_Error("Invalid hash function used for HMAC - too long hash block length");
+		return false;
 	if(sizeof(k_xor_ipad) < (size_t) hlen)
-		Host_Error("Invalid hash function used for HMAC - too long hash length");
+		return false;
 	if(sizeof(catbuf) < (size_t) hblock + (size_t) hlen)
-		Host_Error("Invalid hash function used for HMAC - too long hash block length");
+		return false;
 	if(sizeof(catbuf) < (size_t) hblock + (size_t) n)
-		Host_Error("Invalid hash function used for HMAC - too long message length");
+		return false;
 
 	if(k > hblock)
 	{
@@ -56,4 +56,5 @@ void hmac(
 	memcpy(catbuf, k_xor_opad, hblock);
 	memcpy(catbuf + hblock, hashbuf, hlen);
 	hfunc(out, catbuf, hblock + hlen);
+	return true;
 }