summaryrefslogtreecommitdiffstats
path: root/crypto/evp/e_camellia.c
blob: 26dbe0ecae2239c4a5fb0596f36c4c854b7e7ed0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
/*
 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/*
 * Camellia low level APIs are deprecated for public use, but still ok for
 * internal use.
 */
#include "internal/deprecated.h"

#include <openssl/opensslconf.h>

#include <openssl/evp.h>
#include <openssl/err.h>
#include <string.h>
#include <assert.h>
#include <openssl/camellia.h>
#include "crypto/evp.h"
#include "crypto/modes.h"
#include "crypto/cmll_platform.h"

static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                             const unsigned char *iv, int enc);

/* Camellia subkey Structure */
typedef struct {
    CAMELLIA_KEY ks;
    block128_f block;
    union {
        cbc128_f cbc;
        ctr128_f ctr;
    } stream;
} EVP_CAMELLIA_KEY;

#define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))

/* Attribute operation for Camellia */
#define data(ctx)       EVP_C_DATA(EVP_CAMELLIA_KEY,ctx)

#if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
/* ---------^^^ this is not a typo, just a way to detect that
 * assembler support was in general requested... */
# include "sparc_arch.h"


static int cmll_t4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                            const unsigned char *iv, int enc)
{
    int ret, mode, bits;
    EVP_CAMELLIA_KEY *dat =
        (EVP_CAMELLIA_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx);

    mode = EVP_CIPHER_CTX_mode(ctx);
    bits = EVP_CIPHER_CTX_key_length(ctx) * 8;

    cmll_t4_set_key(key, bits, &dat->ks);

    if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
        && !enc) {
        ret = 0;
        dat->block = (block128_f) cmll_t4_decrypt;
        switch (bits) {
        case 128:
            dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                (cbc128_f) cmll128_t4_cbc_decrypt : NULL;
            break;
        case 192:
        case 256:
            dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
                (cbc128_f) cmll256_t4_cbc_decrypt : NULL;
            break;
        default:
            ret = -1;
        }
    } else {
        ret = 0;
        dat->block = (block128_f) cmll_t4_encrypt;
        switch (bits) {
        case 128:
            if (mode == EVP_CIPH_CBC_MODE)
                dat->stream.cbc = (cbc128_f) cmll128_t4_cbc_encrypt;
            else if (mode == EVP_CIPH_CTR_MODE)
                dat->stream.ctr = (ctr128_f) cmll128_t4_ctr32_encrypt;
            else
                dat->stream.cbc = NULL;
            break;
        case 192:
        case 256:
            if (mode == EVP_CIPH_CBC_MODE)
                dat->stream.cbc = (cbc128_f) cmll256_t4_cbc_encrypt;
            else if (mode == EVP_CIPH_CTR_MODE)
                dat->stream.ctr = (ctr128_f) cmll256_t4_ctr32_encrypt;
            else
                dat->stream.cbc = NULL;
            break;
        default:
            ret = -1;
        }
    }

    if (ret < 0) {
        EVPerr(EVP_F_CMLL_T4_INIT_KEY, EVP_R_CAMELLIA_KEY_SETUP_FAILED);
        return 0;
    }

    return 1;
}

# define cmll_t4_cbc_cipher camellia_cbc_cipher
static int cmll_t4_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

# define cmll_t4_ecb_cipher camellia_ecb_cipher
static int cmll_t4_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

# define cmll_t4_ofb_cipher camellia_ofb_cipher
static int cmll_t4_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

# define cmll_t4_cfb_cipher camellia_cfb_cipher
static int cmll_t4_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

# define cmll_t4_cfb8_cipher camellia_cfb8_cipher
static int cmll_t4_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len);

# define cmll_t4_cfb1_cipher camellia_cfb1_cipher
static int cmll_t4_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len);

# define cmll_t4_ctr_cipher camellia_ctr_cipher
static int cmll_t4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              const unsigned char *in, size_t len);

# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER cmll_t4_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        cmll_t4_init_key,               \
        cmll_t4_##mode##_cipher,        \
        NULL,                           \
        sizeof(EVP_CAMELLIA_KEY),       \
        NULL,NULL,NULL,NULL }; \
static const EVP_CIPHER camellia_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,     \
        keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        camellia_init_key,              \
        camellia_##mode##_cipher,       \
        NULL,                           \
        sizeof(EVP_CAMELLIA_KEY),       \
        NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
{ return SPARC_CMLL_CAPABLE?&cmll_t4_##keylen##_##mode:&camellia_##keylen##_##mode; }

#else

# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER camellia_##keylen##_##mode = { \
        nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
        flags|EVP_CIPH_##MODE##_MODE,   \
        camellia_init_key,              \
        camellia_##mode##_cipher,       \
        NULL,                           \
        sizeof(EVP_CAMELLIA_KEY),       \
        NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
{ return &camellia_##keylen##_##mode; }

#endif

#define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
        BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
        BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
        BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
        BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
        BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
        BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
        BLOCK_CIPHER_generic(nid, keylen, 1, 16, ctr, ctr, CTR, flags)

/* The subkey for Camellia is generated. */
static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                             const unsigned char *iv, int enc)
{
    int ret, mode;
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    ret = Camellia_set_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, &dat->ks);
    if (ret < 0) {
        EVPerr(EVP_F_CAMELLIA_INIT_KEY, EVP_R_CAMELLIA_KEY_SETUP_FAILED);
        return 0;
    }

    mode = EVP_CIPHER_CTX_mode(ctx);
    if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
        && !enc) {
        dat->block = (block128_f) Camellia_decrypt;
        dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
            (cbc128_f) Camellia_cbc_encrypt : NULL;
    } else {
        dat->block = (block128_f) Camellia_encrypt;
        dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
            (cbc128_f) Camellia_cbc_encrypt : NULL;
    }

    return 1;
}

static int camellia_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len)
{
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    if (dat->stream.cbc)
        (*dat->stream.cbc) (in, out, len, &dat->ks,
                            EVP_CIPHER_CTX_iv_noconst(ctx),
                            EVP_CIPHER_CTX_encrypting(ctx));
    else if (EVP_CIPHER_CTX_encrypting(ctx))
        CRYPTO_cbc128_encrypt(in, out, len, &dat->ks,
                              EVP_CIPHER_CTX_iv_noconst(ctx), dat->block);
    else
        CRYPTO_cbc128_decrypt(in, out, len, &dat->ks,
                              EVP_CIPHER_CTX_iv_noconst(ctx), dat->block);

    return 1;
}

static int camellia_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len)
{
    size_t bl = EVP_CIPHER_CTX_block_size(ctx);
    size_t i;
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    if (len < bl)
        return 1;

    for (i = 0, len -= bl; i <= len; i += bl)
        (*dat->block) (in + i, out + i, &dat->ks);

    return 1;
}

static int camellia_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len)
{
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    int num = EVP_CIPHER_CTX_num(ctx);
    CRYPTO_ofb128_encrypt(in, out, len, &dat->ks,
                          EVP_CIPHER_CTX_iv_noconst(ctx), &num, dat->block);
    EVP_CIPHER_CTX_set_num(ctx, num);
    return 1;
}

static int camellia_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len)
{
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    int num = EVP_CIPHER_CTX_num(ctx);
    CRYPTO_cfb128_encrypt(in, out, len, &dat->ks,
                          EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
    EVP_CIPHER_CTX_set_num(ctx, num);
    return 1;
}

static int camellia_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                const unsigned char *in, size_t len)
{
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    int num = EVP_CIPHER_CTX_num(ctx);
    CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks,
                            EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
    EVP_CIPHER_CTX_set_num(ctx, num);
    return 1;
}

static int camellia_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                const unsigned char *in, size_t len)
{
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) {
        int num = EVP_CIPHER_CTX_num(ctx);
        CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks,
                                EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
        EVP_CIPHER_CTX_set_num(ctx, num);
        return 1;
    }

    while (len >= MAXBITCHUNK) {
        int num = EVP_CIPHER_CTX_num(ctx);
        CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
                                EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
        EVP_CIPHER_CTX_set_num(ctx, num);
        len -= MAXBITCHUNK;
        out += MAXBITCHUNK;
        in  += MAXBITCHUNK;
    }
    if (len) {
        int num = EVP_CIPHER_CTX_num(ctx);
        CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks,
                                EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
        EVP_CIPHER_CTX_set_num(ctx, num);
    }

    return 1;
}

static int camellia_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len)
{
    unsigned int num = EVP_CIPHER_CTX_num(ctx);
    EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);

    if (dat->stream.ctr)
        CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
                                    EVP_CIPHER_CTX_iv_noconst(ctx),
                                    EVP_CIPHER_CTX_buf_noconst(ctx), &num,
                                    dat->stream.ctr);
    else
        CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
                              EVP_CIPHER_CTX_iv_noconst(ctx),
                              EVP_CIPHER_CTX_buf_noconst(ctx), &num,
                              dat->block);
    EVP_CIPHER_CTX_set_num(ctx, num);
    return 1;
}

BLOCK_CIPHER_generic_pack(NID_camellia, 128, 0)
    BLOCK_CIPHER_generic_pack(NID_camellia, 192, 0)
    BLOCK_CIPHER_generic_pack(NID_camellia, 256, 0)