Initial revision

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@171 ec53bebd-3082-4978-b11e-865c3cabbd6b
1995-10-23 11:20:30 +00:00
parent b1fce0a864
commit b33abb44fd
118 changed files with 23033 additions and 0 deletions
--- a/lib/des/ecb_enc.c
+++ b/lib/des/ecb_enc.c
@@ -0,0 +1,110 @@
+/* ecb_enc.c */
+/* Copyright (C) 1993 Eric Young - see README for more details */
+#include "des_locl.h"
+#include "spr.h"
+
+int des_ecb_encrypt(des_cblock (*input), des_cblock (*output), struct des_ks_struct *ks, int encrypt)
+{
+  register u_int32_t l0,l1;
+  register unsigned char *in,*out;
+  u_int32_t ll[2];
+
+  in=(unsigned char *)input;
+  out=(unsigned char *)output;
+  c2l(in,l0);
+  c2l(in,l1);
+  ll[0]=l0;
+  ll[1]=l1;
+  des_encrypt(ll,ll,ks,encrypt);
+  l0=ll[0];
+  l1=ll[1];
+  l2c(l0,out);
+  l2c(l1,out);
+  l0=l1=ll[0]=ll[1]=0;
+  return(0);
+}
+
+int des_encrypt(u_int32_t *input, u_int32_t *output, struct des_ks_struct *ks, int encrypt)
+{
+  register u_int32_t l,r,t,u;
+#ifdef ALT_ECB
+  register unsigned char *des_SP=(unsigned char *)des_SPtrans;
+#endif
+#ifdef MSDOS
+  union fudge {
+    u_int32_t  l;
+    unsigned short s[2];
+    unsigned char  c[4];
+  } U,T;
+#endif
+  register int i;
+  register u_int32_t *s;
+
+  l=input[0];
+  r=input[1];
+
+  /* do IP */
+  PERM_OP(r,l,t, 4,0x0f0f0f0f);
+  PERM_OP(l,r,t,16,0x0000ffff);
+  PERM_OP(r,l,t, 2,0x33333333);
+  PERM_OP(l,r,t, 8,0x00ff00ff);
+  PERM_OP(r,l,t, 1,0x55555555);
+  /* r and l are reversed - remember that :-) - fix
+   * it in the next step */
+
+  /* Things have been modified so that the initial rotate is
+   * done outside the loop.  This required the
+   * des_SPtrans values in sp.h to be rotated 1 bit to the right.
+   * One perl script later and things have a 5% speed up on a sparc2.
+   * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
+   * for pointing this out. */
+  t=(r<<1)|(r>>31);
+  r=(l<<1)|(l>>31);
+  l=t;
+
+  /* clear the top bits on machines with 8byte longs */
+  l&=0xffffffff;
+  r&=0xffffffff;
+
+  s=(u_int32_t *)ks;
+  /* I don't know if it is worth the effort of loop unrolling the
+   * inner loop */
+  if (encrypt)
+    {
+      for (i=0; i<32; i+=4)
+	{
+	  D_ENCRYPT(l,r,i+0);	/*  1 */
+	  D_ENCRYPT(r,l,i+2);	/*  2 */
+	}
+    }
+  else
+    {
+      for (i=30; i>0; i-=4)
+	{
+	  D_ENCRYPT(l,r,i-0);	/* 16 */
+	  D_ENCRYPT(r,l,i-2);	/* 15 */
+	}
+    }
+  l=(l>>1)|(l<<31);
+  r=(r>>1)|(r<<31);
+  /* clear the top bits on machines with 8byte longs */
+  l&=0xffffffff;
+  r&=0xffffffff;
+
+  /* swap l and r
+   * we will not do the swap so just remember they are
+   * reversed for the rest of the subroutine
+   * luckily FP fixes this problem :-) */
+
+  PERM_OP(r,l,t, 1,0x55555555);
+  PERM_OP(l,r,t, 8,0x00ff00ff);
+  PERM_OP(r,l,t, 2,0x33333333);
+  PERM_OP(l,r,t,16,0x0000ffff);
+  PERM_OP(r,l,t, 4,0x0f0f0f0f);
+
+  output[0]=l;
+  output[1]=r;
+  l=r=t=u=0;
+  return(0);
+}
+