Add functions des_set_key_checked, des_set_key_unchecked.

[openssl.git] / crypto / des / set_key.c

diff --git a/crypto/des/set_key.c b/crypto/des/set_key.c
index c3bcd7ee2b23b7555e8ad83cf64ee18b59e9f035..eb64bd5292711dc524f63d4b8f980222f64156fd 100644 (file)
--- a/crypto/des/set_key.c
+++ b/crypto/des/set_key.c
@@ -67,16 +67,10 @@
 #include "podd.h"
 #include "sk.h"
 
-#ifndef NOPROTO
-static int check_parity(des_cblock (*key));
-#else
-static int check_parity();
-#endif
+static int check_parity(const_des_cblock *key);
+OPENSSL_GLOBAL int des_check_key=0;
 
-int des_check_key=0;
-
-void des_set_odd_parity(key)
-des_cblock (*key);
+void des_set_odd_parity(des_cblock *key)
        {
        int i;
 
@@ -84,8 +78,7 @@ des_cblock (*key);
                (*key)[i]=odd_parity[(*key)[i]];
        }
 
-static int check_parity(key)
-des_cblock (*key);
+static int check_parity(const_des_cblock *key)
        {
        int i;
 
@@ -111,8 +104,8 @@ static des_cblock weak_keys[NUM_WEAK_KEY]={
        /* weak keys */
        {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01},
        {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE},
-       {0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F},
-       {0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0},
+       {0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E},
+       {0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1},
        /* semi-weak keys */
        {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE},
        {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01},
@@ -127,8 +120,7 @@ static des_cblock weak_keys[NUM_WEAK_KEY]={
        {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE},
        {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}};
 
-int des_is_weak_key(key)
-des_cblock (*key);
+int des_is_weak_key(const_des_cblock *key)
        {
        int i;
 
@@ -153,31 +145,43 @@ des_cblock (*key);
 #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
        (a)=(a)^(t)^(t>>(16-(n))))
 
+int des_set_key(const_des_cblock *key, des_key_schedule schedule)
+       {
+       if (des_check_key)
+               {
+               return des_set_key_checked(key, schedule);
+               }
+       else
+               {
+               des_set_key_unchecked(key, schedule);
+               return 0;
+               }
+       }
+
 /* return 0 if key parity is odd (correct),
  * return -1 if key parity error,
  * return -2 if illegal weak key.
  */
-int des_set_key(key, schedule)
-des_cblock (*key);
-des_key_schedule schedule;
+int des_set_key_checked(const_des_cblock *key, des_key_schedule schedule)
+       {
+       if (!check_parity(key))
+               return(-1);
+       if (des_is_weak_key(key))
+               return(-2);
+       des_set_key_unchecked(key, schedule);
+       return 0;
+       }
+
+void des_set_key_unchecked(const_des_cblock *key, des_key_schedule schedule)
        {
        static int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0};
        register DES_LONG c,d,t,s,t2;
-       register unsigned char *in;
+       register const unsigned char *in;
        register DES_LONG *k;
        register int i;
 
-       if (des_check_key)
-               {
-               if (!check_parity(key))
-                       return(-1);
-
-               if (des_is_weak_key(key))
-                       return(-2);
-               }
-
-       k=(DES_LONG *)schedule;
-       in=(unsigned char *)key;
+       k = &schedule->ks.deslong[0];
+       in = &(*key)[0];
 
        c2l(in,c);
        c2l(in,d);
@@ -235,12 +239,9 @@ des_key_schedule schedule;
                t2=((s>>16L)|(t&0xffff0000L));
                *(k++)=ROTATE(t2,26)&0xffffffffL;
                }
-       return(0);
        }
 
-int des_key_sched(key, schedule)
-des_cblock (*key);
-des_key_schedule schedule;
+int des_key_sched(const_des_cblock *key, des_key_schedule schedule)
        {
        return(des_set_key(key,schedule));
        }