-/* crypto/rc2/rc2_cbc.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
* 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:
* 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
* 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
* [including the GNU Public Licence.]
*/
-#include "rc2.h"
+#include <openssl/rc2.h>
#include "rc2_locl.h"
-void RC2_cbc_encrypt(in, out, length, ks, iv, encrypt)
-unsigned char *in;
-unsigned char *out;
-long length;
-RC2_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;
- RC2_encrypt(tin,ks,RC2_ENCRYPT);
- 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;
- RC2_encrypt(tin,ks,RC2_ENCRYPT);
- 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;
- RC2_encrypt(tin,ks,RC2_DECRYPT);
- 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;
- RC2_encrypt(tin,ks,RC2_DECRYPT);
- 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 RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
+ RC2_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;
+ RC2_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;
+ RC2_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;
+ RC2_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;
+ RC2_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 RC2_encrypt(unsigned long *d, RC2_KEY *key)
+{
+ int i, n;
+ register RC2_INT *p0, *p1;
+ register RC2_INT x0, x1, x2, x3, t;
+ unsigned long l;
+
+ l = d[0];
+ x0 = (RC2_INT) l & 0xffff;
+ x1 = (RC2_INT) (l >> 16L);
+ l = d[1];
+ x2 = (RC2_INT) l & 0xffff;
+ x3 = (RC2_INT) (l >> 16L);
+
+ n = 3;
+ i = 5;
+
+ p0 = p1 = &(key->data[0]);
+ for (;;) {
+ t = (x0 + (x1 & ~x3) + (x2 & x3) + *(p0++)) & 0xffff;
+ x0 = (t << 1) | (t >> 15);
+ t = (x1 + (x2 & ~x0) + (x3 & x0) + *(p0++)) & 0xffff;
+ x1 = (t << 2) | (t >> 14);
+ t = (x2 + (x3 & ~x1) + (x0 & x1) + *(p0++)) & 0xffff;
+ x2 = (t << 3) | (t >> 13);
+ t = (x3 + (x0 & ~x2) + (x1 & x2) + *(p0++)) & 0xffff;
+ x3 = (t << 5) | (t >> 11);
+
+ if (--i == 0) {
+ if (--n == 0)
+ break;
+ i = (n == 2) ? 6 : 5;
+
+ x0 += p1[x3 & 0x3f];
+ x1 += p1[x0 & 0x3f];
+ x2 += p1[x1 & 0x3f];
+ x3 += p1[x2 & 0x3f];
+ }
+ }
+
+ d[0] =
+ (unsigned long)(x0 & 0xffff) | ((unsigned long)(x1 & 0xffff) << 16L);
+ d[1] =
+ (unsigned long)(x2 & 0xffff) | ((unsigned long)(x3 & 0xffff) << 16L);
+}
+
+void RC2_decrypt(unsigned long *d, RC2_KEY *key)
+{
+ int i, n;
+ register RC2_INT *p0, *p1;
+ register RC2_INT x0, x1, x2, x3, t;
+ unsigned long l;
+
+ l = d[0];
+ x0 = (RC2_INT) l & 0xffff;
+ x1 = (RC2_INT) (l >> 16L);
+ l = d[1];
+ x2 = (RC2_INT) l & 0xffff;
+ x3 = (RC2_INT) (l >> 16L);
+
+ n = 3;
+ i = 5;
+
+ p0 = &(key->data[63]);
+ p1 = &(key->data[0]);
+ for (;;) {
+ t = ((x3 << 11) | (x3 >> 5)) & 0xffff;
+ x3 = (t - (x0 & ~x2) - (x1 & x2) - *(p0--)) & 0xffff;
+ t = ((x2 << 13) | (x2 >> 3)) & 0xffff;
+ x2 = (t - (x3 & ~x1) - (x0 & x1) - *(p0--)) & 0xffff;
+ t = ((x1 << 14) | (x1 >> 2)) & 0xffff;
+ x1 = (t - (x2 & ~x0) - (x3 & x0) - *(p0--)) & 0xffff;
+ t = ((x0 << 15) | (x0 >> 1)) & 0xffff;
+ x0 = (t - (x1 & ~x3) - (x2 & x3) - *(p0--)) & 0xffff;
+
+ if (--i == 0) {
+ if (--n == 0)
+ break;
+ i = (n == 2) ? 6 : 5;
+
+ x3 = (x3 - p1[x2 & 0x3f]) & 0xffff;
+ x2 = (x2 - p1[x1 & 0x3f]) & 0xffff;
+ x1 = (x1 - p1[x0 & 0x3f]) & 0xffff;
+ x0 = (x0 - p1[x3 & 0x3f]) & 0xffff;
+ }
+ }
+ d[0] =
+ (unsigned long)(x0 & 0xffff) | ((unsigned long)(x1 & 0xffff) << 16L);
+ d[1] =
+ (unsigned long)(x2 & 0xffff) | ((unsigned long)(x3 & 0xffff) << 16L);
+}
projects / openssl.git / blobdiff