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-rw-r--r--crypto/rc5/rc5_enc.c292
1 files changed, 143 insertions, 149 deletions
diff --git a/crypto/rc5/rc5_enc.c b/crypto/rc5/rc5_enc.c
index f327d32a7660..06b89d83a1a8 100644
--- a/crypto/rc5/rc5_enc.c
+++ b/crypto/rc5/rc5_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
@@ -61,155 +61,149 @@
#include "rc5_locl.h"
void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out,
- long length, RC5_32_KEY *ks, unsigned char *iv,
- int encrypt)
- {
- register unsigned long tin0,tin1;
- register unsigned long tout0,tout1,xor0,xor1;
- register long l=length;
- unsigned long tin[2];
+ long length, RC5_32_KEY *ks, unsigned char *iv,
+ int encrypt)
+{
+ register unsigned long tin0, tin1;
+ register unsigned long tout0, tout1, xor0, xor1;
+ register long l = length;
+ unsigned long tin[2];
- if (encrypt)
- {
- c2l(iv,tout0);
- c2l(iv,tout1);
- iv-=8;
- for (l-=8; l>=0; l-=8)
- {
- c2l(in,tin0);
- c2l(in,tin1);
- tin0^=tout0;
- tin1^=tout1;
- tin[0]=tin0;
- tin[1]=tin1;
- RC5_32_encrypt(tin,ks);
- tout0=tin[0]; l2c(tout0,out);
- tout1=tin[1]; l2c(tout1,out);
- }
- if (l != -8)
- {
- c2ln(in,tin0,tin1,l+8);
- tin0^=tout0;
- tin1^=tout1;
- tin[0]=tin0;
- tin[1]=tin1;
- RC5_32_encrypt(tin,ks);
- tout0=tin[0]; l2c(tout0,out);
- tout1=tin[1]; l2c(tout1,out);
- }
- l2c(tout0,iv);
- l2c(tout1,iv);
- }
- else
- {
- c2l(iv,xor0);
- c2l(iv,xor1);
- iv-=8;
- for (l-=8; l>=0; l-=8)
- {
- c2l(in,tin0); tin[0]=tin0;
- c2l(in,tin1); tin[1]=tin1;
- RC5_32_decrypt(tin,ks);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- l2c(tout0,out);
- l2c(tout1,out);
- xor0=tin0;
- xor1=tin1;
- }
- if (l != -8)
- {
- c2l(in,tin0); tin[0]=tin0;
- c2l(in,tin1); tin[1]=tin1;
- RC5_32_decrypt(tin,ks);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- l2cn(tout0,tout1,out,l+8);
- xor0=tin0;
- xor1=tin1;
- }
- l2c(xor0,iv);
- l2c(xor1,iv);
- }
- tin0=tin1=tout0=tout1=xor0=xor1=0;
- tin[0]=tin[1]=0;
- }
+ if (encrypt) {
+ c2l(iv, tout0);
+ c2l(iv, tout1);
+ iv -= 8;
+ for (l -= 8; l >= 0; l -= 8) {
+ c2l(in, tin0);
+ c2l(in, tin1);
+ tin0 ^= tout0;
+ tin1 ^= tout1;
+ tin[0] = tin0;
+ tin[1] = tin1;
+ RC5_32_encrypt(tin, ks);
+ tout0 = tin[0];
+ l2c(tout0, out);
+ tout1 = tin[1];
+ l2c(tout1, out);
+ }
+ if (l != -8) {
+ c2ln(in, tin0, tin1, l + 8);
+ tin0 ^= tout0;
+ tin1 ^= tout1;
+ tin[0] = tin0;
+ tin[1] = tin1;
+ RC5_32_encrypt(tin, ks);
+ tout0 = tin[0];
+ l2c(tout0, out);
+ tout1 = tin[1];
+ l2c(tout1, out);
+ }
+ l2c(tout0, iv);
+ l2c(tout1, iv);
+ } else {
+ c2l(iv, xor0);
+ c2l(iv, xor1);
+ iv -= 8;
+ for (l -= 8; l >= 0; l -= 8) {
+ c2l(in, tin0);
+ tin[0] = tin0;
+ c2l(in, tin1);
+ tin[1] = tin1;
+ RC5_32_decrypt(tin, ks);
+ tout0 = tin[0] ^ xor0;
+ tout1 = tin[1] ^ xor1;
+ l2c(tout0, out);
+ l2c(tout1, out);
+ xor0 = tin0;
+ xor1 = tin1;
+ }
+ if (l != -8) {
+ c2l(in, tin0);
+ tin[0] = tin0;
+ c2l(in, tin1);
+ tin[1] = tin1;
+ RC5_32_decrypt(tin, ks);
+ tout0 = tin[0] ^ xor0;
+ tout1 = tin[1] ^ xor1;
+ l2cn(tout0, tout1, out, l + 8);
+ xor0 = tin0;
+ xor1 = tin1;
+ }
+ l2c(xor0, iv);
+ l2c(xor1, iv);
+ }
+ tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
+ tin[0] = tin[1] = 0;
+}
void RC5_32_encrypt(unsigned long *d, RC5_32_KEY *key)
- {
- RC5_32_INT a,b,*s;
+{
+ RC5_32_INT a, b, *s;
- s=key->data;
+ s = key->data;
- a=d[0]+s[0];
- b=d[1]+s[1];
- E_RC5_32(a,b,s, 2);
- E_RC5_32(a,b,s, 4);
- E_RC5_32(a,b,s, 6);
- E_RC5_32(a,b,s, 8);
- E_RC5_32(a,b,s,10);
- E_RC5_32(a,b,s,12);
- E_RC5_32(a,b,s,14);
- E_RC5_32(a,b,s,16);
- if (key->rounds == 12)
- {
- E_RC5_32(a,b,s,18);
- E_RC5_32(a,b,s,20);
- E_RC5_32(a,b,s,22);
- E_RC5_32(a,b,s,24);
- }
- else if (key->rounds == 16)
- {
- /* Do a full expansion to avoid a jump */
- E_RC5_32(a,b,s,18);
- E_RC5_32(a,b,s,20);
- E_RC5_32(a,b,s,22);
- E_RC5_32(a,b,s,24);
- E_RC5_32(a,b,s,26);
- E_RC5_32(a,b,s,28);
- E_RC5_32(a,b,s,30);
- E_RC5_32(a,b,s,32);
- }
- d[0]=a;
- d[1]=b;
- }
+ a = d[0] + s[0];
+ b = d[1] + s[1];
+ E_RC5_32(a, b, s, 2);
+ E_RC5_32(a, b, s, 4);
+ E_RC5_32(a, b, s, 6);
+ E_RC5_32(a, b, s, 8);
+ E_RC5_32(a, b, s, 10);
+ E_RC5_32(a, b, s, 12);
+ E_RC5_32(a, b, s, 14);
+ E_RC5_32(a, b, s, 16);
+ if (key->rounds == 12) {
+ E_RC5_32(a, b, s, 18);
+ E_RC5_32(a, b, s, 20);
+ E_RC5_32(a, b, s, 22);
+ E_RC5_32(a, b, s, 24);
+ } else if (key->rounds == 16) {
+ /* Do a full expansion to avoid a jump */
+ E_RC5_32(a, b, s, 18);
+ E_RC5_32(a, b, s, 20);
+ E_RC5_32(a, b, s, 22);
+ E_RC5_32(a, b, s, 24);
+ E_RC5_32(a, b, s, 26);
+ E_RC5_32(a, b, s, 28);
+ E_RC5_32(a, b, s, 30);
+ E_RC5_32(a, b, s, 32);
+ }
+ d[0] = a;
+ d[1] = b;
+}
void RC5_32_decrypt(unsigned long *d, RC5_32_KEY *key)
- {
- RC5_32_INT a,b,*s;
-
- s=key->data;
+{
+ RC5_32_INT a, b, *s;
- a=d[0];
- b=d[1];
- if (key->rounds == 16)
- {
- D_RC5_32(a,b,s,32);
- D_RC5_32(a,b,s,30);
- D_RC5_32(a,b,s,28);
- D_RC5_32(a,b,s,26);
- /* Do a full expansion to avoid a jump */
- D_RC5_32(a,b,s,24);
- D_RC5_32(a,b,s,22);
- D_RC5_32(a,b,s,20);
- D_RC5_32(a,b,s,18);
- }
- else if (key->rounds == 12)
- {
- D_RC5_32(a,b,s,24);
- D_RC5_32(a,b,s,22);
- D_RC5_32(a,b,s,20);
- D_RC5_32(a,b,s,18);
- }
- D_RC5_32(a,b,s,16);
- D_RC5_32(a,b,s,14);
- D_RC5_32(a,b,s,12);
- D_RC5_32(a,b,s,10);
- D_RC5_32(a,b,s, 8);
- D_RC5_32(a,b,s, 6);
- D_RC5_32(a,b,s, 4);
- D_RC5_32(a,b,s, 2);
- d[0]=a-s[0];
- d[1]=b-s[1];
- }
+ s = key->data;
+ a = d[0];
+ b = d[1];
+ if (key->rounds == 16) {
+ D_RC5_32(a, b, s, 32);
+ D_RC5_32(a, b, s, 30);
+ D_RC5_32(a, b, s, 28);
+ D_RC5_32(a, b, s, 26);
+ /* Do a full expansion to avoid a jump */
+ D_RC5_32(a, b, s, 24);
+ D_RC5_32(a, b, s, 22);
+ D_RC5_32(a, b, s, 20);
+ D_RC5_32(a, b, s, 18);
+ } else if (key->rounds == 12) {
+ D_RC5_32(a, b, s, 24);
+ D_RC5_32(a, b, s, 22);
+ D_RC5_32(a, b, s, 20);
+ D_RC5_32(a, b, s, 18);
+ }
+ D_RC5_32(a, b, s, 16);
+ D_RC5_32(a, b, s, 14);
+ D_RC5_32(a, b, s, 12);
+ D_RC5_32(a, b, s, 10);
+ D_RC5_32(a, b, s, 8);
+ D_RC5_32(a, b, s, 6);
+ D_RC5_32(a, b, s, 4);
+ D_RC5_32(a, b, s, 2);
+ d[0] = a - s[0];
+ d[1] = b - s[1];
+}