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-rw-r--r--crypto/cast/c_enc.c276
1 files changed, 134 insertions, 142 deletions
diff --git a/crypto/cast/c_enc.c b/crypto/cast/c_enc.c
index 357c41ebf08a..6e1d50f10dd9 100644
--- a/crypto/cast/c_enc.c
+++ b/crypto/cast/c_enc.c
@@ -5,21 +5,21 @@
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
- *
+ *
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
+ *
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@@ -34,10 +34,10 @@
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
+ * 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
+ *
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
- *
+ *
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
@@ -60,149 +60,141 @@
#include "cast_lcl.h"
void CAST_encrypt(CAST_LONG *data, const CAST_KEY *key)
- {
- register CAST_LONG l,r,t;
- const register CAST_LONG *k;
+{
+ register CAST_LONG l, r, t;
+ const register CAST_LONG *k;
- k= &(key->data[0]);
- l=data[0];
- r=data[1];
+ k = &(key->data[0]);
+ l = data[0];
+ r = data[1];
- E_CAST( 0,k,l,r,+,^,-);
- E_CAST( 1,k,r,l,^,-,+);
- E_CAST( 2,k,l,r,-,+,^);
- E_CAST( 3,k,r,l,+,^,-);
- E_CAST( 4,k,l,r,^,-,+);
- E_CAST( 5,k,r,l,-,+,^);
- E_CAST( 6,k,l,r,+,^,-);
- E_CAST( 7,k,r,l,^,-,+);
- E_CAST( 8,k,l,r,-,+,^);
- E_CAST( 9,k,r,l,+,^,-);
- E_CAST(10,k,l,r,^,-,+);
- E_CAST(11,k,r,l,-,+,^);
- if(!key->short_key)
- {
- E_CAST(12,k,l,r,+,^,-);
- E_CAST(13,k,r,l,^,-,+);
- E_CAST(14,k,l,r,-,+,^);
- E_CAST(15,k,r,l,+,^,-);
- }
+ E_CAST(0, k, l, r, +, ^, -);
+ E_CAST(1, k, r, l, ^, -, +);
+ E_CAST(2, k, l, r, -, +, ^);
+ E_CAST(3, k, r, l, +, ^, -);
+ E_CAST(4, k, l, r, ^, -, +);
+ E_CAST(5, k, r, l, -, +, ^);
+ E_CAST(6, k, l, r, +, ^, -);
+ E_CAST(7, k, r, l, ^, -, +);
+ E_CAST(8, k, l, r, -, +, ^);
+ E_CAST(9, k, r, l, +, ^, -);
+ E_CAST(10, k, l, r, ^, -, +);
+ E_CAST(11, k, r, l, -, +, ^);
+ if (!key->short_key) {
+ E_CAST(12, k, l, r, +, ^, -);
+ E_CAST(13, k, r, l, ^, -, +);
+ E_CAST(14, k, l, r, -, +, ^);
+ E_CAST(15, k, r, l, +, ^, -);
+ }
- data[1]=l&0xffffffffL;
- data[0]=r&0xffffffffL;
- }
+ data[1] = l & 0xffffffffL;
+ data[0] = r & 0xffffffffL;
+}
void CAST_decrypt(CAST_LONG *data, const CAST_KEY *key)
- {
- register CAST_LONG l,r,t;
- const register CAST_LONG *k;
+{
+ register CAST_LONG l, r, t;
+ const register CAST_LONG *k;
- k= &(key->data[0]);
- l=data[0];
- r=data[1];
+ k = &(key->data[0]);
+ l = data[0];
+ r = data[1];
- if(!key->short_key)
- {
- E_CAST(15,k,l,r,+,^,-);
- E_CAST(14,k,r,l,-,+,^);
- E_CAST(13,k,l,r,^,-,+);
- E_CAST(12,k,r,l,+,^,-);
- }
- E_CAST(11,k,l,r,-,+,^);
- E_CAST(10,k,r,l,^,-,+);
- E_CAST( 9,k,l,r,+,^,-);
- E_CAST( 8,k,r,l,-,+,^);
- E_CAST( 7,k,l,r,^,-,+);
- E_CAST( 6,k,r,l,+,^,-);
- E_CAST( 5,k,l,r,-,+,^);
- E_CAST( 4,k,r,l,^,-,+);
- E_CAST( 3,k,l,r,+,^,-);
- E_CAST( 2,k,r,l,-,+,^);
- E_CAST( 1,k,l,r,^,-,+);
- E_CAST( 0,k,r,l,+,^,-);
+ if (!key->short_key) {
+ E_CAST(15, k, l, r, +, ^, -);
+ E_CAST(14, k, r, l, -, +, ^);
+ E_CAST(13, k, l, r, ^, -, +);
+ E_CAST(12, k, r, l, +, ^, -);
+ }
+ E_CAST(11, k, l, r, -, +, ^);
+ E_CAST(10, k, r, l, ^, -, +);
+ E_CAST(9, k, l, r, +, ^, -);
+ E_CAST(8, k, r, l, -, +, ^);
+ E_CAST(7, k, l, r, ^, -, +);
+ E_CAST(6, k, r, l, +, ^, -);
+ E_CAST(5, k, l, r, -, +, ^);
+ E_CAST(4, k, r, l, ^, -, +);
+ E_CAST(3, k, l, r, +, ^, -);
+ E_CAST(2, k, r, l, -, +, ^);
+ E_CAST(1, k, l, r, ^, -, +);
+ E_CAST(0, k, r, l, +, ^, -);
- data[1]=l&0xffffffffL;
- data[0]=r&0xffffffffL;
- }
+ data[1] = l & 0xffffffffL;
+ data[0] = r & 0xffffffffL;
+}
-void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
- const CAST_KEY *ks, unsigned char *iv, int enc)
- {
- register CAST_LONG tin0,tin1;
- register CAST_LONG tout0,tout1,xor0,xor1;
- register long l=length;
- CAST_LONG tin[2];
+void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out,
+ long length, const CAST_KEY *ks, unsigned char *iv,
+ int enc)
+{
+ register CAST_LONG tin0, tin1;
+ register CAST_LONG tout0, tout1, xor0, xor1;
+ register long l = length;
+ CAST_LONG tin[2];
- if (enc)
- {
- 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;
- CAST_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;
- CAST_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;
- CAST_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;
- CAST_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;
- }
+ if (enc) {
+ 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;
+ CAST_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;
+ CAST_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;
+ CAST_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;
+ CAST_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;
+}