]> andersk Git - gssapi-openssh.git/blobdiff - openssh/deattack.c
The man2html from jbasney on pkilab2 works whereas the standard one doesn't.
[gssapi-openssh.git] / openssh / deattack.c
index 8b55d668681a1e78c0c2973cedcace140a8b25d9..1a89be4b803887d318f5146926bad92ef7c65ce3 100644 (file)
@@ -1,3 +1,5 @@
+/*     $OpenBSD: deattack.c,v 1.14 2001/06/23 15:12:18 itojun Exp $    */
+
 /*
  * Cryptographic attack detector for ssh - source code
  *
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: deattack.c,v 1.19 2003/09/18 08:49:45 markus Exp $");
-
 #include "deattack.h"
 #include "log.h"
 #include "crc32.h"
 #include "getput.h"
 #include "xmalloc.h"
-#include "deattack.h"
 
 /* SSH Constants */
 #define SSH_MAXBLOCKS  (32 * 1024)
@@ -37,7 +36,7 @@ RCSID("$OpenBSD: deattack.c,v 1.19 2003/09/18 08:49:45 markus Exp $");
 #define HASH_FACTOR(x) ((x)*3/2)
 #define HASH_UNUSEDCHAR        (0xff)
 #define HASH_UNUSED    (0xffff)
-#define HASH_IV                (0xfffe)
+#define HASH_IV        (0xfffe)
 
 #define HASH_MINBLOCKS (7*SSH_BLOCKSIZE)
 
@@ -86,9 +85,9 @@ detect_attack(u_char *buf, u_int32_t len, u_char *IV)
 {
        static u_int16_t *h = (u_int16_t *) NULL;
        static u_int32_t n = HASH_MINSIZE / HASH_ENTRYSIZE;
-       u_int32_t i, j;
+       register u_int32_t i, j;
        u_int32_t l;
-       u_char *c;
+       register u_char *c;
        u_char *d;
 
        if (len > (SSH_MAXBLOCKS * SSH_BLOCKSIZE) ||
@@ -100,12 +99,12 @@ detect_attack(u_char *buf, u_int32_t len, u_char *IV)
 
        if (h == NULL) {
                debug("Installing crc compensation attack detector.");
-               h = (u_int16_t *) xmalloc(l * HASH_ENTRYSIZE);
                n = l;
+               h = (u_int16_t *) xmalloc(n * HASH_ENTRYSIZE);
        } else {
                if (l > n) {
-                       h = (u_int16_t *) xrealloc(h, l * HASH_ENTRYSIZE);
                        n = l;
+                       h = (u_int16_t *) xrealloc(h, n * HASH_ENTRYSIZE);
                }
        }
 
@@ -135,7 +134,7 @@ detect_attack(u_char *buf, u_int32_t len, u_char *IV)
 
        for (c = buf, j = 0; c < (buf + len); c += SSH_BLOCKSIZE, j++) {
                for (i = HASH(c) & (n - 1); h[i] != HASH_UNUSED;
-                   i = (i + 1) & (n - 1)) {
+                    i = (i + 1) & (n - 1)) {
                        if (h[i] == HASH_IV) {
                                if (!CMP(c, IV)) {
                                        if (check_crc(c, buf, len, IV))
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