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Diffstat (limited to 'src/lib/libcrypto/camellia/cmll_cfb.c')
-rw-r--r--src/lib/libcrypto/camellia/cmll_cfb.c110
1 files changed, 7 insertions, 103 deletions
diff --git a/src/lib/libcrypto/camellia/cmll_cfb.c b/src/lib/libcrypto/camellia/cmll_cfb.c
index af0f9f49ad..3d81b51d3f 100644
--- a/src/lib/libcrypto/camellia/cmll_cfb.c
+++ b/src/lib/libcrypto/camellia/cmll_cfb.c
@@ -105,17 +105,8 @@
105 * [including the GNU Public Licence.] 105 * [including the GNU Public Licence.]
106 */ 106 */
107 107
108#ifndef CAMELLIA_DEBUG
109# ifndef NDEBUG
110# define NDEBUG
111# endif
112#endif
113#include <assert.h>
114#include <string.h>
115
116#include <openssl/camellia.h> 108#include <openssl/camellia.h>
117#include "cmll_locl.h" 109#include <openssl/modes.h>
118#include "e_os.h"
119 110
120 111
121/* The input and output encrypted as though 128bit cfb mode is being 112/* The input and output encrypted as though 128bit cfb mode is being
@@ -124,112 +115,25 @@
124 */ 115 */
125 116
126void Camellia_cfb128_encrypt(const unsigned char *in, unsigned char *out, 117void Camellia_cfb128_encrypt(const unsigned char *in, unsigned char *out,
127 const unsigned long length, const CAMELLIA_KEY *key, 118 size_t length, const CAMELLIA_KEY *key,
128 unsigned char *ivec, int *num, const int enc) 119 unsigned char *ivec, int *num, const int enc)
129 { 120 {
130 121
131 unsigned int n; 122 CRYPTO_cfb128_encrypt(in,out,length,key,ivec,num,enc,(block128_f)Camellia_encrypt);
132 unsigned long l = length;
133 unsigned char c;
134
135 assert(in && out && key && ivec && num);
136
137 n = *num;
138
139 if (enc)
140 {
141 while (l--)
142 {
143 if (n == 0)
144 {
145 Camellia_encrypt(ivec, ivec, key);
146 }
147 ivec[n] = *(out++) = *(in++) ^ ivec[n];
148 n = (n+1) % CAMELLIA_BLOCK_SIZE;
149 }
150 }
151 else
152 {
153 while (l--)
154 {
155 if (n == 0)
156 {
157 Camellia_encrypt(ivec, ivec, key);
158 }
159 c = *(in);
160 *(out++) = *(in++) ^ ivec[n];
161 ivec[n] = c;
162 n = (n+1) % CAMELLIA_BLOCK_SIZE;
163 }
164 }
165
166 *num=n;
167 }
168
169/* This expects a single block of size nbits for both in and out. Note that
170 it corrupts any extra bits in the last byte of out */
171void Camellia_cfbr_encrypt_block(const unsigned char *in,unsigned char *out,
172 const int nbits,const CAMELLIA_KEY *key,
173 unsigned char *ivec,const int enc)
174 {
175 int n,rem,num;
176 unsigned char ovec[CAMELLIA_BLOCK_SIZE*2];
177
178 if (nbits<=0 || nbits>128) return;
179
180 /* fill in the first half of the new IV with the current IV */
181 memcpy(ovec,ivec,CAMELLIA_BLOCK_SIZE);
182 /* construct the new IV */
183 Camellia_encrypt(ivec,ivec,key);
184 num = (nbits+7)/8;
185 if (enc) /* encrypt the input */
186 for(n=0 ; n < num ; ++n)
187 out[n] = (ovec[CAMELLIA_BLOCK_SIZE+n] = in[n] ^ ivec[n]);
188 else /* decrypt the input */
189 for(n=0 ; n < num ; ++n)
190 out[n] = (ovec[CAMELLIA_BLOCK_SIZE+n] = in[n]) ^ ivec[n];
191 /* shift ovec left... */
192 rem = nbits%8;
193 num = nbits/8;
194 if(rem==0)
195 memcpy(ivec,ovec+num,CAMELLIA_BLOCK_SIZE);
196 else
197 for(n=0 ; n < CAMELLIA_BLOCK_SIZE ; ++n)
198 ivec[n] = ovec[n+num]<<rem | ovec[n+num+1]>>(8-rem);
199
200 /* it is not necessary to cleanse ovec, since the IV is not secret */
201 } 123 }
202 124
203/* N.B. This expects the input to be packed, MS bit first */ 125/* N.B. This expects the input to be packed, MS bit first */
204void Camellia_cfb1_encrypt(const unsigned char *in, unsigned char *out, 126void Camellia_cfb1_encrypt(const unsigned char *in, unsigned char *out,
205 const unsigned long length, const CAMELLIA_KEY *key, 127 size_t length, const CAMELLIA_KEY *key,
206 unsigned char *ivec, int *num, const int enc) 128 unsigned char *ivec, int *num, const int enc)
207 { 129 {
208 unsigned int n; 130 CRYPTO_cfb128_1_encrypt(in,out,length,key,ivec,num,enc,(block128_f)Camellia_encrypt);
209 unsigned char c[1],d[1];
210
211 assert(in && out && key && ivec && num);
212 assert(*num == 0);
213
214 memset(out,0,(length+7)/8);
215 for(n=0 ; n < length ; ++n)
216 {
217 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
218 Camellia_cfbr_encrypt_block(c,d,1,key,ivec,enc);
219 out[n/8]=(out[n/8]&~(1 << (7-n%8)))|((d[0]&0x80) >> (n%8));
220 }
221 } 131 }
222 132
223void Camellia_cfb8_encrypt(const unsigned char *in, unsigned char *out, 133void Camellia_cfb8_encrypt(const unsigned char *in, unsigned char *out,
224 const unsigned long length, const CAMELLIA_KEY *key, 134 size_t length, const CAMELLIA_KEY *key,
225 unsigned char *ivec, int *num, const int enc) 135 unsigned char *ivec, int *num, const int enc)
226 { 136 {
227 unsigned int n; 137 CRYPTO_cfb128_8_encrypt(in,out,length,key,ivec,num,enc,(block128_f)Camellia_encrypt);
228
229 assert(in && out && key && ivec && num);
230 assert(*num == 0);
231
232 for(n=0 ; n < length ; ++n)
233 Camellia_cfbr_encrypt_block(&in[n],&out[n],8,key,ivec,enc);
234 } 138 }
235 139