Initial revision

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@298 ec53bebd-3082-4978-b11e-865c3cabbd6b
1996-03-15 14:55:26 +00:00
parent 3635cccce3
commit 81cbbf7820
35 changed files with 3651 additions and 0 deletions
--- a/string2key.c
+++ b/string2key.c
@@ -0,0 +1,87 @@
+#include "krb5_locl.h"
+
+static void reverse(unsigned char *p)
+{
+  unsigned char tmp[8];
+  unsigned int a, b;
+  int i;
+  
+  a = 0;
+  b = *(unsigned int*)p;
+  for(i = 0; i < 32; i++){
+    a >>= 1;
+    a |= b & 0x80000000;
+    b <<= 1;
+  }
+  *(unsigned int*)(tmp + 4) = a;
+    
+  a = 0;
+  b = *(unsigned int*)(p + 4);
+  for(i = 0; i < 32; i++){
+    a >>= 1;
+    a |= b & 0x80000000;
+    b <<= 1;
+  }
+  *(unsigned int*)tmp = a;
+    
+  a = 0;
+  b = 0;
+  memmove(p, tmp, 8);
+  memset(tmp, 0, 8);
+}
+
+
+krb5_error_code
+mit_des_string_to_key(const krb5_keytype keytype,
+		      krb5_keyblock *keyblock,
+		      krb5_data *data, 
+		      krb5_data *salt)
+{
+  unsigned char *p;
+  unsigned char *key;
+  unsigned char tmp[8];
+
+  int len;
+  int i, j;
+  int odd = 0;
+
+  len = data->length;
+  if(salt)
+    len += salt->length;
+  len = (len / 8 + 1) * 8;
+  p = (unsigned char*)malloc(len);
+  memset(p, 0, len);
+  memmove(p, data->data, data->length);
+  if(salt)
+    memmove(p + data->length, salt->data, salt->length);
+
+  memset(key, 0, 8);
+
+  for(i = 0; i < len; i += 8){
+    memmove(tmp, p + i, 8);
+    if(odd)
+      reverse(tmp);
+#ifndef RFC1510
+    else
+      for(j = 0; j < 8; j++) tmp[j] <<= 1;
+#endif
+    for(j = 0; j < 8; j++)
+      key[j] ^= tmp[j];
+    odd = !odd;
+  }
+
+  des_set_odd_parity(key);
+  des_key_schedule(key, &sched);
+  des_cbc_cksum(key, key, 8, &sched, key);
+  des_set_odd_parity(key);
+  if(des_is_weak_key(key))
+    key[8] ^= 0xf0;
+  memset(p, 0, len);
+  memset(tmp, 0, 8);
+  free(p);
+  keyblock->keytype = KEYTYPE_DES;
+  keyblock->contents.data = key;
+  keyblock->contents.length = 8;
+  
+  return 0;
+}