* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* 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
#include "cmll_locl.h"
#include "e_os.h"
-
-/* The input and output encrypted as though 128bit cfb mode is being
- * used. The extra state information to record how much of the
- * 128bit block we have used is contained in *num;
+/*
+ * The input and output encrypted as though 128bit cfb mode is being used.
+ * The extra state information to record how much of the 128bit block we have
+ * used is contained in *num;
*/
void Camellia_cfb128_encrypt(const unsigned char *in, unsigned char *out,
- const unsigned long length, const CAMELLIA_KEY *key,
- unsigned char *ivec, int *num, const int enc)
- {
-
- unsigned int n;
- unsigned long l = length;
- unsigned char c;
-
- assert(in && out && key && ivec && num);
-
- n = *num;
-
- if (enc)
- {
- while (l--)
- {
- if (n == 0)
- {
- Camellia_encrypt(ivec, ivec, key);
- }
- ivec[n] = *(out++) = *(in++) ^ ivec[n];
- n = (n+1) % CAMELLIA_BLOCK_SIZE;
- }
- }
- else
- {
- while (l--)
- {
- if (n == 0)
- {
- Camellia_encrypt(ivec, ivec, key);
- }
- c = *(in);
- *(out++) = *(in++) ^ ivec[n];
- ivec[n] = c;
- n = (n+1) % CAMELLIA_BLOCK_SIZE;
- }
- }
-
- *num=n;
- }
-
-/* This expects a single block of size nbits for both in and out. Note that
- it corrupts any extra bits in the last byte of out */
-void Camellia_cfbr_encrypt_block(const unsigned char *in,unsigned char *out,
- const int nbits,const CAMELLIA_KEY *key,
- unsigned char *ivec,const int enc)
- {
- int n,rem,num;
- unsigned char ovec[CAMELLIA_BLOCK_SIZE*2];
-
- if (nbits<=0 || nbits>128) return;
-
- /* fill in the first half of the new IV with the current IV */
- memcpy(ovec,ivec,CAMELLIA_BLOCK_SIZE);
- /* construct the new IV */
- Camellia_encrypt(ivec,ivec,key);
- num = (nbits+7)/8;
- if (enc) /* encrypt the input */
- for(n=0 ; n < num ; ++n)
- out[n] = (ovec[CAMELLIA_BLOCK_SIZE+n] = in[n] ^ ivec[n]);
- else /* decrypt the input */
- for(n=0 ; n < num ; ++n)
- out[n] = (ovec[CAMELLIA_BLOCK_SIZE+n] = in[n]) ^ ivec[n];
- /* shift ovec left... */
- rem = nbits%8;
- num = nbits/8;
- if(rem==0)
- memcpy(ivec,ovec+num,CAMELLIA_BLOCK_SIZE);
- else
- for(n=0 ; n < CAMELLIA_BLOCK_SIZE ; ++n)
- ivec[n] = ovec[n+num]<<rem | ovec[n+num+1]>>(8-rem);
-
- /* it is not necessary to cleanse ovec, since the IV is not secret */
- }
+ const unsigned long length,
+ const CAMELLIA_KEY *key, unsigned char *ivec,
+ int *num, const int enc)
+{
+
+ unsigned int n;
+ unsigned long l = length;
+ unsigned char c;
+
+ assert(in && out && key && ivec && num);
+
+ n = *num;
+
+ if (enc) {
+ while (l--) {
+ if (n == 0) {
+ Camellia_encrypt(ivec, ivec, key);
+ }
+ ivec[n] = *(out++) = *(in++) ^ ivec[n];
+ n = (n + 1) % CAMELLIA_BLOCK_SIZE;
+ }
+ } else {
+ while (l--) {
+ if (n == 0) {
+ Camellia_encrypt(ivec, ivec, key);
+ }
+ c = *(in);
+ *(out++) = *(in++) ^ ivec[n];
+ ivec[n] = c;
+ n = (n + 1) % CAMELLIA_BLOCK_SIZE;
+ }
+ }
+
+ *num = n;
+}
+
+/*
+ * This expects a single block of size nbits for both in and out. Note that
+ * it corrupts any extra bits in the last byte of out
+ */
+void Camellia_cfbr_encrypt_block(const unsigned char *in, unsigned char *out,
+ const int nbits, const CAMELLIA_KEY *key,
+ unsigned char *ivec, const int enc)
+{
+ int n, rem, num;
+ unsigned char ovec[CAMELLIA_BLOCK_SIZE * 2];
+
+ if (nbits <= 0 || nbits > 128)
+ return;
+
+ /* fill in the first half of the new IV with the current IV */
+ memcpy(ovec, ivec, CAMELLIA_BLOCK_SIZE);
+ /* construct the new IV */
+ Camellia_encrypt(ivec, ivec, key);
+ num = (nbits + 7) / 8;
+ if (enc) /* encrypt the input */
+ for (n = 0; n < num; ++n)
+ out[n] = (ovec[CAMELLIA_BLOCK_SIZE + n] = in[n] ^ ivec[n]);
+ else /* decrypt the input */
+ for (n = 0; n < num; ++n)
+ out[n] = (ovec[CAMELLIA_BLOCK_SIZE + n] = in[n]) ^ ivec[n];
+ /* shift ovec left... */
+ rem = nbits % 8;
+ num = nbits / 8;
+ if (rem == 0)
+ memcpy(ivec, ovec + num, CAMELLIA_BLOCK_SIZE);
+ else
+ for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
+ ivec[n] = ovec[n + num] << rem | ovec[n + num + 1] >> (8 - rem);
+
+ /* it is not necessary to cleanse ovec, since the IV is not secret */
+}
/* N.B. This expects the input to be packed, MS bit first */
void Camellia_cfb1_encrypt(const unsigned char *in, unsigned char *out,
- const unsigned long length, const CAMELLIA_KEY *key,
- unsigned char *ivec, int *num, const int enc)
- {
- unsigned int n;
- unsigned char c[1],d[1];
-
- assert(in && out && key && ivec && num);
- assert(*num == 0);
-
- memset(out,0,(length+7)/8);
- for(n=0 ; n < length ; ++n)
- {
- c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
- Camellia_cfbr_encrypt_block(c,d,1,key,ivec,enc);
- out[n/8]=(out[n/8]&~(1 << (7-n%8)))|((d[0]&0x80) >> (n%8));
- }
- }
+ const unsigned long length,
+ const CAMELLIA_KEY *key, unsigned char *ivec,
+ int *num, const int enc)
+{
+ unsigned int n;
+ unsigned char c[1], d[1];
+
+ assert(in && out && key && ivec && num);
+ assert(*num == 0);
+
+ memset(out, 0, (length + 7) / 8);
+ for (n = 0; n < length; ++n) {
+ c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
+ Camellia_cfbr_encrypt_block(c, d, 1, key, ivec, enc);
+ out[n / 8] =
+ (out[n / 8] & ~(1 << (7 - n % 8))) | ((d[0] & 0x80) >> (n % 8));
+ }
+}
void Camellia_cfb8_encrypt(const unsigned char *in, unsigned char *out,
- const unsigned long length, const CAMELLIA_KEY *key,
- unsigned char *ivec, int *num, const int enc)
- {
- unsigned int n;
-
- assert(in && out && key && ivec && num);
- assert(*num == 0);
-
- for(n=0 ; n < length ; ++n)
- Camellia_cfbr_encrypt_block(&in[n],&out[n],8,key,ivec,enc);
- }
-
+ const unsigned long length,
+ const CAMELLIA_KEY *key, unsigned char *ivec,
+ int *num, const int enc)
+{
+ unsigned int n;
+
+ assert(in && out && key && ivec && num);
+ assert(*num == 0);
+
+ for (n = 0; n < length; ++n)
+ Camellia_cfbr_encrypt_block(&in[n], &out[n], 8, key, ivec, enc);
+}
projects / openssl.git / blobdiff