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Import of old SSLeay release: SSLeay 0.9.0b
[openssl.git] / crypto / bf / bf_enc.c
diff --git a/crypto/bf/bf_enc.c b/crypto/bf/bf_enc.c
index 9bcc2169ce2770c5c51cba6559a6dee54275a205..66a8604c594b20f58b59ba3f51c97d10e0b1f749 100644 (file)
--- a/crypto/bf/bf_enc.c
+++ b/crypto/bf/bf_enc.c
@@ -1,5 +1,5 @@
 /* crypto/bf/bf_enc.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
  * This package is an SSL implementation written
@@ -69,10 +69,9 @@ If you set BF_ROUNDS to some value other than 16 or 20, you will have
 to modify the code.
 #endif
 
-void BF_encrypt(data,key,encrypt)
+void BF_encrypt(data,key)
 BF_LONG *data;
 BF_KEY *key;
-int encrypt;
        {
        register BF_LONG l,r,*p,*s;
 
@@ -81,60 +80,162 @@ int encrypt;
        l=data[0];
        r=data[1];
 
-       if (encrypt)
-               {
-               l^=p[0];
-               BF_ENC(r,l,s,p[ 1]);
-               BF_ENC(l,r,s,p[ 2]);
-               BF_ENC(r,l,s,p[ 3]);
-               BF_ENC(l,r,s,p[ 4]);
-               BF_ENC(r,l,s,p[ 5]);
-               BF_ENC(l,r,s,p[ 6]);
-               BF_ENC(r,l,s,p[ 7]);
-               BF_ENC(l,r,s,p[ 8]);
-               BF_ENC(r,l,s,p[ 9]);
-               BF_ENC(l,r,s,p[10]);
-               BF_ENC(r,l,s,p[11]);
-               BF_ENC(l,r,s,p[12]);
-               BF_ENC(r,l,s,p[13]);
-               BF_ENC(l,r,s,p[14]);
-               BF_ENC(r,l,s,p[15]);
-               BF_ENC(l,r,s,p[16]);
+       l^=p[0];
+       BF_ENC(r,l,s,p[ 1]);
+       BF_ENC(l,r,s,p[ 2]);
+       BF_ENC(r,l,s,p[ 3]);
+       BF_ENC(l,r,s,p[ 4]);
+       BF_ENC(r,l,s,p[ 5]);
+       BF_ENC(l,r,s,p[ 6]);
+       BF_ENC(r,l,s,p[ 7]);
+       BF_ENC(l,r,s,p[ 8]);
+       BF_ENC(r,l,s,p[ 9]);
+       BF_ENC(l,r,s,p[10]);
+       BF_ENC(r,l,s,p[11]);
+       BF_ENC(l,r,s,p[12]);
+       BF_ENC(r,l,s,p[13]);
+       BF_ENC(l,r,s,p[14]);
+       BF_ENC(r,l,s,p[15]);
+       BF_ENC(l,r,s,p[16]);
 #if BF_ROUNDS == 20
-               BF_ENC(r,l,s,p[17]);
-               BF_ENC(l,r,s,p[18]);
-               BF_ENC(r,l,s,p[19]);
-               BF_ENC(l,r,s,p[20]);
+       BF_ENC(r,l,s,p[17]);
+       BF_ENC(l,r,s,p[18]);
+       BF_ENC(r,l,s,p[19]);
+       BF_ENC(l,r,s,p[20]);
 #endif
-               r^=p[BF_ROUNDS+1];
-               }
-       else
-               {
-               l^=p[BF_ROUNDS+1];
+       r^=p[BF_ROUNDS+1];
+
+       data[1]=l&0xffffffffL;
+       data[0]=r&0xffffffffL;
+       }
+
+#ifndef BF_DEFAULT_OPTIONS
+
+void BF_decrypt(data,key)
+BF_LONG *data;
+BF_KEY *key;
+       {
+       register BF_LONG l,r,*p,*s;
+
+       p=key->P;
+       s= &(key->S[0]);
+       l=data[0];
+       r=data[1];
+
+       l^=p[BF_ROUNDS+1];
 #if BF_ROUNDS == 20
-               BF_ENC(r,l,s,p[20]);
-               BF_ENC(l,r,s,p[19]);
-               BF_ENC(r,l,s,p[18]);
-               BF_ENC(l,r,s,p[17]);
+       BF_ENC(r,l,s,p[20]);
+       BF_ENC(l,r,s,p[19]);
+       BF_ENC(r,l,s,p[18]);
+       BF_ENC(l,r,s,p[17]);
 #endif
-               BF_ENC(r,l,s,p[16]);
-               BF_ENC(l,r,s,p[15]);
-               BF_ENC(r,l,s,p[14]);
-               BF_ENC(l,r,s,p[13]);
-               BF_ENC(r,l,s,p[12]);
-               BF_ENC(l,r,s,p[11]);
-               BF_ENC(r,l,s,p[10]);
-               BF_ENC(l,r,s,p[ 9]);
-               BF_ENC(r,l,s,p[ 8]);
-               BF_ENC(l,r,s,p[ 7]);
-               BF_ENC(r,l,s,p[ 6]);
-               BF_ENC(l,r,s,p[ 5]);
-               BF_ENC(r,l,s,p[ 4]);
-               BF_ENC(l,r,s,p[ 3]);
-               BF_ENC(r,l,s,p[ 2]);
-               BF_ENC(l,r,s,p[ 1]);
-               r^=p[0];
-               }
+       BF_ENC(r,l,s,p[16]);
+       BF_ENC(l,r,s,p[15]);
+       BF_ENC(r,l,s,p[14]);
+       BF_ENC(l,r,s,p[13]);
+       BF_ENC(r,l,s,p[12]);
+       BF_ENC(l,r,s,p[11]);
+       BF_ENC(r,l,s,p[10]);
+       BF_ENC(l,r,s,p[ 9]);
+       BF_ENC(r,l,s,p[ 8]);
+       BF_ENC(l,r,s,p[ 7]);
+       BF_ENC(r,l,s,p[ 6]);
+       BF_ENC(l,r,s,p[ 5]);
+       BF_ENC(r,l,s,p[ 4]);
+       BF_ENC(l,r,s,p[ 3]);
+       BF_ENC(r,l,s,p[ 2]);
+       BF_ENC(l,r,s,p[ 1]);
+       r^=p[0];
+
        data[1]=l&0xffffffffL;
        data[0]=r&0xffffffffL;
        }
+
+void BF_cbc_encrypt(in, out, length, ks, iv, encrypt)
+unsigned char *in;
+unsigned char *out;
+long length;
+BF_KEY *ks;
+unsigned char *iv;
+int encrypt;
+       {
+       register BF_LONG tin0,tin1;
+       register BF_LONG tout0,tout1,xor0,xor1;
+       register long l=length;
+       BF_LONG tin[2];
+
+       if (encrypt)
+               {
+               n2l(iv,tout0);
+               n2l(iv,tout1);
+               iv-=8;
+               for (l-=8; l>=0; l-=8)
+                       {
+                       n2l(in,tin0);
+                       n2l(in,tin1);
+                       tin0^=tout0;
+                       tin1^=tout1;
+                       tin[0]=tin0;
+                       tin[1]=tin1;
+                       BF_encrypt(tin,ks);
+                       tout0=tin[0];
+                       tout1=tin[1];
+                       l2n(tout0,out);
+                       l2n(tout1,out);
+                       }
+               if (l != -8)
+                       {
+                       n2ln(in,tin0,tin1,l+8);
+                       tin0^=tout0;
+                       tin1^=tout1;
+                       tin[0]=tin0;
+                       tin[1]=tin1;
+                       BF_encrypt(tin,ks);
+                       tout0=tin[0];
+                       tout1=tin[1];
+                       l2n(tout0,out);
+                       l2n(tout1,out);
+                       }
+               l2n(tout0,iv);
+               l2n(tout1,iv);
+               }
+       else
+               {
+               n2l(iv,xor0);
+               n2l(iv,xor1);
+               iv-=8;
+               for (l-=8; l>=0; l-=8)
+                       {
+                       n2l(in,tin0);
+                       n2l(in,tin1);
+                       tin[0]=tin0;
+                       tin[1]=tin1;
+                       BF_decrypt(tin,ks);
+                       tout0=tin[0]^xor0;
+                       tout1=tin[1]^xor1;
+                       l2n(tout0,out);
+                       l2n(tout1,out);
+                       xor0=tin0;
+                       xor1=tin1;
+                       }
+               if (l != -8)
+                       {
+                       n2l(in,tin0);
+                       n2l(in,tin1);
+                       tin[0]=tin0;
+                       tin[1]=tin1;
+                       BF_decrypt(tin,ks);
+                       tout0=tin[0]^xor0;
+                       tout1=tin[1]^xor1;
+                       l2nn(tout0,tout1,out,l+8);
+                       xor0=tin0;
+                       xor1=tin1;
+                       }
+               l2n(xor0,iv);
+               l2n(xor1,iv);
+               }
+       tin0=tin1=tout0=tout1=xor0=xor1=0;
+       tin[0]=tin[1]=0;
+       }
+
+#endif
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