1 /*
2 * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11 #include "internal/deprecated.h"
12
13 #include "internal/cryptlib.h"
14 #ifndef OPENSSL_NO_ARIA
15 # include <openssl/evp.h>
16 # include <openssl/modes.h>
17 # include <openssl/rand.h>
18 # include "crypto/aria.h"
19 # include "crypto/evp.h"
20 # include "crypto/modes.h"
21 # include "evp_local.h"
22
23 /* ARIA subkey Structure */
24 typedef struct {
25 ARIA_KEY ks;
26 } EVP_ARIA_KEY;
27
28 /* ARIA GCM context */
29 typedef struct {
30 union {
31 OSSL_UNION_ALIGN;
32 ARIA_KEY ks;
33 } ks; /* ARIA subkey to use */
34 int key_set; /* Set if key initialised */
35 int iv_set; /* Set if an iv is set */
36 GCM128_CONTEXT gcm;
37 unsigned char *iv; /* Temporary IV store */
38 int ivlen; /* IV length */
39 int taglen;
40 int iv_gen; /* It is OK to generate IVs */
41 int tls_aad_len; /* TLS AAD length */
42 } EVP_ARIA_GCM_CTX;
43
44 /* ARIA CCM context */
45 typedef struct {
46 union {
47 OSSL_UNION_ALIGN;
48 ARIA_KEY ks;
49 } ks; /* ARIA key schedule to use */
50 int key_set; /* Set if key initialised */
51 int iv_set; /* Set if an iv is set */
52 int tag_set; /* Set if tag is valid */
53 int len_set; /* Set if message length set */
54 int L, M; /* L and M parameters from RFC3610 */
55 int tls_aad_len; /* TLS AAD length */
56 CCM128_CONTEXT ccm;
57 ccm128_f str;
58 } EVP_ARIA_CCM_CTX;
59
60 /* The subkey for ARIA is generated. */
aria_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)61 static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
62 const unsigned char *iv, int enc)
63 {
64 int ret;
65 int mode = EVP_CIPHER_CTX_get_mode(ctx);
66
67 if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE))
68 ret = ossl_aria_set_encrypt_key(key,
69 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
70 EVP_CIPHER_CTX_get_cipher_data(ctx));
71 else
72 ret = ossl_aria_set_decrypt_key(key,
73 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
74 EVP_CIPHER_CTX_get_cipher_data(ctx));
75 if (ret < 0) {
76 ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
77 return 0;
78 }
79 return 1;
80 }
81
aria_cbc_encrypt(const unsigned char * in,unsigned char * out,size_t len,const ARIA_KEY * key,unsigned char * ivec,const int enc)82 static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out,
83 size_t len, const ARIA_KEY *key,
84 unsigned char *ivec, const int enc)
85 {
86
87 if (enc)
88 CRYPTO_cbc128_encrypt(in, out, len, key, ivec,
89 (block128_f) ossl_aria_encrypt);
90 else
91 CRYPTO_cbc128_decrypt(in, out, len, key, ivec,
92 (block128_f) ossl_aria_encrypt);
93 }
94
aria_cfb128_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num,const int enc)95 static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out,
96 size_t length, const ARIA_KEY *key,
97 unsigned char *ivec, int *num, const int enc)
98 {
99
100 CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
101 (block128_f) ossl_aria_encrypt);
102 }
103
aria_cfb1_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num,const int enc)104 static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out,
105 size_t length, const ARIA_KEY *key,
106 unsigned char *ivec, int *num, const int enc)
107 {
108 CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
109 (block128_f) ossl_aria_encrypt);
110 }
111
aria_cfb8_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num,const int enc)112 static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out,
113 size_t length, const ARIA_KEY *key,
114 unsigned char *ivec, int *num, const int enc)
115 {
116 CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
117 (block128_f) ossl_aria_encrypt);
118 }
119
aria_ecb_encrypt(const unsigned char * in,unsigned char * out,const ARIA_KEY * key,const int enc)120 static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out,
121 const ARIA_KEY *key, const int enc)
122 {
123 ossl_aria_encrypt(in, out, key);
124 }
125
aria_ofb128_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num)126 static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out,
127 size_t length, const ARIA_KEY *key,
128 unsigned char *ivec, int *num)
129 {
130 CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
131 (block128_f) ossl_aria_encrypt);
132 }
133
134 IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY,
135 NID_aria_128, 16, 16, 16, 128,
136 0, aria_init_key, NULL,
137 EVP_CIPHER_set_asn1_iv,
138 EVP_CIPHER_get_asn1_iv,
139 NULL)
140 IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY,
141 NID_aria_192, 16, 24, 16, 128,
142 0, aria_init_key, NULL,
143 EVP_CIPHER_set_asn1_iv,
144 EVP_CIPHER_get_asn1_iv,
145 NULL)
146 IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY,
147 NID_aria_256, 16, 32, 16, 128,
148 0, aria_init_key, NULL,
149 EVP_CIPHER_set_asn1_iv,
150 EVP_CIPHER_get_asn1_iv,
151 NULL)
152
153 # define IMPLEMENT_ARIA_CFBR(ksize,cbits) \
154 IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0)
155 IMPLEMENT_ARIA_CFBR(128,1)
156 IMPLEMENT_ARIA_CFBR(192,1)
157 IMPLEMENT_ARIA_CFBR(256,1)
158 IMPLEMENT_ARIA_CFBR(128,8)
159 IMPLEMENT_ARIA_CFBR(192,8)
160 IMPLEMENT_ARIA_CFBR(256,8)
161
162 # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
163 static const EVP_CIPHER aria_##keylen##_##mode = { \
164 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
165 flags|EVP_CIPH_##MODE##_MODE, \
166 EVP_ORIG_GLOBAL, \
167 aria_init_key, \
168 aria_##mode##_cipher, \
169 NULL, \
170 sizeof(EVP_ARIA_KEY), \
171 NULL,NULL,NULL,NULL }; \
172 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
173 { return &aria_##keylen##_##mode; }
174
aria_ctr_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)175 static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
176 const unsigned char *in, size_t len)
177 {
178 int n = EVP_CIPHER_CTX_get_num(ctx);
179 unsigned int num;
180 EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY, ctx);
181
182 if (n < 0)
183 return 0;
184 num = (unsigned int)n;
185
186 CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv,
187 EVP_CIPHER_CTX_buf_noconst(ctx), &num,
188 (block128_f) ossl_aria_encrypt);
189 EVP_CIPHER_CTX_set_num(ctx, num);
190 return 1;
191 }
192
193 BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0)
194 BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0)
195 BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0)
196
197 /* Authenticated cipher modes (GCM/CCM) */
198
199 /* increment counter (64-bit int) by 1 */
ctr64_inc(unsigned char * counter)200 static void ctr64_inc(unsigned char *counter)
201 {
202 int n = 8;
203 unsigned char c;
204
205 do {
206 --n;
207 c = counter[n];
208 ++c;
209 counter[n] = c;
210 if (c)
211 return;
212 } while (n);
213 }
214
aria_gcm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)215 static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
216 const unsigned char *iv, int enc)
217 {
218 int ret;
219 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
220
221 if (!iv && !key)
222 return 1;
223 if (key) {
224 ret = ossl_aria_set_encrypt_key(key,
225 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
226 &gctx->ks.ks);
227 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
228 (block128_f) ossl_aria_encrypt);
229 if (ret < 0) {
230 ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
231 return 0;
232 }
233
234 /*
235 * If we have an iv can set it directly, otherwise use saved IV.
236 */
237 if (iv == NULL && gctx->iv_set)
238 iv = gctx->iv;
239 if (iv) {
240 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
241 gctx->iv_set = 1;
242 }
243 gctx->key_set = 1;
244 } else {
245 /* If key set use IV, otherwise copy */
246 if (gctx->key_set)
247 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
248 else
249 memcpy(gctx->iv, iv, gctx->ivlen);
250 gctx->iv_set = 1;
251 gctx->iv_gen = 0;
252 }
253 return 1;
254 }
255
aria_gcm_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)256 static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
257 {
258 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, c);
259
260 switch (type) {
261 case EVP_CTRL_INIT:
262 gctx->key_set = 0;
263 gctx->iv_set = 0;
264 gctx->ivlen = EVP_CIPHER_get_iv_length(c->cipher);
265 gctx->iv = c->iv;
266 gctx->taglen = -1;
267 gctx->iv_gen = 0;
268 gctx->tls_aad_len = -1;
269 return 1;
270
271 case EVP_CTRL_GET_IVLEN:
272 *(int *)ptr = gctx->ivlen;
273 return 1;
274
275 case EVP_CTRL_AEAD_SET_IVLEN:
276 if (arg <= 0)
277 return 0;
278 /* Allocate memory for IV if needed */
279 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
280 if (gctx->iv != c->iv)
281 OPENSSL_free(gctx->iv);
282 if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) {
283 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
284 return 0;
285 }
286 }
287 gctx->ivlen = arg;
288 return 1;
289
290 case EVP_CTRL_AEAD_SET_TAG:
291 if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_is_encrypting(c))
292 return 0;
293 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
294 gctx->taglen = arg;
295 return 1;
296
297 case EVP_CTRL_AEAD_GET_TAG:
298 if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_is_encrypting(c)
299 || gctx->taglen < 0)
300 return 0;
301 memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg);
302 return 1;
303
304 case EVP_CTRL_GCM_SET_IV_FIXED:
305 /* Special case: -1 length restores whole IV */
306 if (arg == -1) {
307 memcpy(gctx->iv, ptr, gctx->ivlen);
308 gctx->iv_gen = 1;
309 return 1;
310 }
311 /*
312 * Fixed field must be at least 4 bytes and invocation field at least
313 * 8.
314 */
315 if ((arg < 4) || (gctx->ivlen - arg) < 8)
316 return 0;
317 if (arg)
318 memcpy(gctx->iv, ptr, arg);
319 if (EVP_CIPHER_CTX_is_encrypting(c)
320 && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
321 return 0;
322 gctx->iv_gen = 1;
323 return 1;
324
325 case EVP_CTRL_GCM_IV_GEN:
326 if (gctx->iv_gen == 0 || gctx->key_set == 0)
327 return 0;
328 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
329 if (arg <= 0 || arg > gctx->ivlen)
330 arg = gctx->ivlen;
331 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
332 /*
333 * Invocation field will be at least 8 bytes in size and so no need
334 * to check wrap around or increment more than last 8 bytes.
335 */
336 ctr64_inc(gctx->iv + gctx->ivlen - 8);
337 gctx->iv_set = 1;
338 return 1;
339
340 case EVP_CTRL_GCM_SET_IV_INV:
341 if (gctx->iv_gen == 0 || gctx->key_set == 0
342 || EVP_CIPHER_CTX_is_encrypting(c))
343 return 0;
344 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
345 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
346 gctx->iv_set = 1;
347 return 1;
348
349 case EVP_CTRL_AEAD_TLS1_AAD:
350 /* Save the AAD for later use */
351 if (arg != EVP_AEAD_TLS1_AAD_LEN)
352 return 0;
353 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
354 gctx->tls_aad_len = arg;
355 {
356 unsigned int len =
357 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
358 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
359 /* Correct length for explicit IV */
360 if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
361 return 0;
362 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
363 /* If decrypting correct for tag too */
364 if (!EVP_CIPHER_CTX_is_encrypting(c)) {
365 if (len < EVP_GCM_TLS_TAG_LEN)
366 return 0;
367 len -= EVP_GCM_TLS_TAG_LEN;
368 }
369 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
370 EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
371 }
372 /* Extra padding: tag appended to record */
373 return EVP_GCM_TLS_TAG_LEN;
374
375 case EVP_CTRL_COPY:
376 {
377 EVP_CIPHER_CTX *out = ptr;
378 EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX, out);
379 if (gctx->gcm.key) {
380 if (gctx->gcm.key != &gctx->ks)
381 return 0;
382 gctx_out->gcm.key = &gctx_out->ks;
383 }
384 if (gctx->iv == c->iv)
385 gctx_out->iv = out->iv;
386 else {
387 if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) {
388 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
389 return 0;
390 }
391 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
392 }
393 return 1;
394 }
395
396 default:
397 return -1;
398
399 }
400 }
401
aria_gcm_tls_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)402 static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
403 const unsigned char *in, size_t len)
404 {
405 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
406 int rv = -1;
407
408 /* Encrypt/decrypt must be performed in place */
409 if (out != in
410 || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
411 return -1;
412 /*
413 * Set IV from start of buffer or generate IV and write to start of
414 * buffer.
415 */
416 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_is_encrypting(ctx) ?
417 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
418 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
419 goto err;
420 /* Use saved AAD */
421 if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
422 gctx->tls_aad_len))
423 goto err;
424 /* Fix buffer and length to point to payload */
425 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
426 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
427 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
428 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
429 /* Encrypt payload */
430 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
431 goto err;
432 out += len;
433 /* Finally write tag */
434 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
435 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
436 } else {
437 /* Decrypt */
438 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
439 goto err;
440 /* Retrieve tag */
441 CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
442 EVP_GCM_TLS_TAG_LEN);
443 /* If tag mismatch wipe buffer */
444 if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len,
445 EVP_GCM_TLS_TAG_LEN)) {
446 OPENSSL_cleanse(out, len);
447 goto err;
448 }
449 rv = len;
450 }
451
452 err:
453 gctx->iv_set = 0;
454 gctx->tls_aad_len = -1;
455 return rv;
456 }
457
aria_gcm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)458 static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
459 const unsigned char *in, size_t len)
460 {
461 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
462
463 /* If not set up, return error */
464 if (!gctx->key_set)
465 return -1;
466
467 if (gctx->tls_aad_len >= 0)
468 return aria_gcm_tls_cipher(ctx, out, in, len);
469
470 if (!gctx->iv_set)
471 return -1;
472 if (in) {
473 if (out == NULL) {
474 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
475 return -1;
476 } else if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
477 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
478 return -1;
479 } else {
480 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
481 return -1;
482 }
483 return len;
484 }
485 if (!EVP_CIPHER_CTX_is_encrypting(ctx)) {
486 if (gctx->taglen < 0)
487 return -1;
488 if (CRYPTO_gcm128_finish(&gctx->gcm,
489 EVP_CIPHER_CTX_buf_noconst(ctx),
490 gctx->taglen) != 0)
491 return -1;
492 gctx->iv_set = 0;
493 return 0;
494 }
495 CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);
496 gctx->taglen = 16;
497 /* Don't reuse the IV */
498 gctx->iv_set = 0;
499 return 0;
500 }
501
aria_gcm_cleanup(EVP_CIPHER_CTX * ctx)502 static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx)
503 {
504 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
505
506 if (gctx->iv != ctx->iv)
507 OPENSSL_free(gctx->iv);
508
509 return 1;
510 }
511
aria_ccm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)512 static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
513 const unsigned char *iv, int enc)
514 {
515 int ret;
516 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
517
518 if (!iv && !key)
519 return 1;
520
521 if (key) {
522 ret = ossl_aria_set_encrypt_key(key,
523 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
524 &cctx->ks.ks);
525 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
526 &cctx->ks, (block128_f) ossl_aria_encrypt);
527 if (ret < 0) {
528 ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
529 return 0;
530 }
531 cctx->str = NULL;
532 cctx->key_set = 1;
533 }
534 if (iv) {
535 memcpy(ctx->iv, iv, 15 - cctx->L);
536 cctx->iv_set = 1;
537 }
538 return 1;
539 }
540
aria_ccm_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)541 static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
542 {
543 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, c);
544
545 switch (type) {
546 case EVP_CTRL_INIT:
547 cctx->key_set = 0;
548 cctx->iv_set = 0;
549 cctx->L = 8;
550 cctx->M = 12;
551 cctx->tag_set = 0;
552 cctx->len_set = 0;
553 cctx->tls_aad_len = -1;
554 return 1;
555
556 case EVP_CTRL_GET_IVLEN:
557 *(int *)ptr = 15 - cctx->L;
558 return 1;
559
560 case EVP_CTRL_AEAD_TLS1_AAD:
561 /* Save the AAD for later use */
562 if (arg != EVP_AEAD_TLS1_AAD_LEN)
563 return 0;
564 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
565 cctx->tls_aad_len = arg;
566 {
567 uint16_t len =
568 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
569 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
570 /* Correct length for explicit IV */
571 if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN)
572 return 0;
573 len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
574 /* If decrypting correct for tag too */
575 if (!EVP_CIPHER_CTX_is_encrypting(c)) {
576 if (len < cctx->M)
577 return 0;
578 len -= cctx->M;
579 }
580 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
581 EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
582 }
583 /* Extra padding: tag appended to record */
584 return cctx->M;
585
586 case EVP_CTRL_CCM_SET_IV_FIXED:
587 /* Sanity check length */
588 if (arg != EVP_CCM_TLS_FIXED_IV_LEN)
589 return 0;
590 /* Just copy to first part of IV */
591 memcpy(c->iv, ptr, arg);
592 return 1;
593
594 case EVP_CTRL_AEAD_SET_IVLEN:
595 arg = 15 - arg;
596 /* fall thru */
597 case EVP_CTRL_CCM_SET_L:
598 if (arg < 2 || arg > 8)
599 return 0;
600 cctx->L = arg;
601 return 1;
602 case EVP_CTRL_AEAD_SET_TAG:
603 if ((arg & 1) || arg < 4 || arg > 16)
604 return 0;
605 if (EVP_CIPHER_CTX_is_encrypting(c) && ptr)
606 return 0;
607 if (ptr) {
608 cctx->tag_set = 1;
609 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
610 }
611 cctx->M = arg;
612 return 1;
613
614 case EVP_CTRL_AEAD_GET_TAG:
615 if (!EVP_CIPHER_CTX_is_encrypting(c) || !cctx->tag_set)
616 return 0;
617 if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
618 return 0;
619 cctx->tag_set = 0;
620 cctx->iv_set = 0;
621 cctx->len_set = 0;
622 return 1;
623
624 case EVP_CTRL_COPY:
625 {
626 EVP_CIPHER_CTX *out = ptr;
627 EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX, out);
628 if (cctx->ccm.key) {
629 if (cctx->ccm.key != &cctx->ks)
630 return 0;
631 cctx_out->ccm.key = &cctx_out->ks;
632 }
633 return 1;
634 }
635
636 default:
637 return -1;
638 }
639 }
640
aria_ccm_tls_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)641 static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
642 const unsigned char *in, size_t len)
643 {
644 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
645 CCM128_CONTEXT *ccm = &cctx->ccm;
646
647 /* Encrypt/decrypt must be performed in place */
648 if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))
649 return -1;
650 /* If encrypting set explicit IV from sequence number (start of AAD) */
651 if (EVP_CIPHER_CTX_is_encrypting(ctx))
652 memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),
653 EVP_CCM_TLS_EXPLICIT_IV_LEN);
654 /* Get rest of IV from explicit IV */
655 memcpy(ctx->iv + EVP_CCM_TLS_FIXED_IV_LEN, in,
656 EVP_CCM_TLS_EXPLICIT_IV_LEN);
657 /* Correct length value */
658 len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
659 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,
660 len))
661 return -1;
662 /* Use saved AAD */
663 CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx),
664 cctx->tls_aad_len);
665 /* Fix buffer to point to payload */
666 in += EVP_CCM_TLS_EXPLICIT_IV_LEN;
667 out += EVP_CCM_TLS_EXPLICIT_IV_LEN;
668 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
669 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
670 : CRYPTO_ccm128_encrypt(ccm, in, out, len))
671 return -1;
672 if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))
673 return -1;
674 return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
675 } else {
676 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str)
677 : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
678 unsigned char tag[16];
679 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
680 if (!CRYPTO_memcmp(tag, in + len, cctx->M))
681 return len;
682 }
683 }
684 OPENSSL_cleanse(out, len);
685 return -1;
686 }
687 }
688
aria_ccm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)689 static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
690 const unsigned char *in, size_t len)
691 {
692 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
693 CCM128_CONTEXT *ccm = &cctx->ccm;
694
695 /* If not set up, return error */
696 if (!cctx->key_set)
697 return -1;
698
699 if (cctx->tls_aad_len >= 0)
700 return aria_ccm_tls_cipher(ctx, out, in, len);
701
702 /* EVP_*Final() doesn't return any data */
703 if (in == NULL && out != NULL)
704 return 0;
705
706 if (!cctx->iv_set)
707 return -1;
708
709 if (!out) {
710 if (!in) {
711 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
712 return -1;
713 cctx->len_set = 1;
714 return len;
715 }
716 /* If have AAD need message length */
717 if (!cctx->len_set && len)
718 return -1;
719 CRYPTO_ccm128_aad(ccm, in, len);
720 return len;
721 }
722
723 /* The tag must be set before actually decrypting data */
724 if (!EVP_CIPHER_CTX_is_encrypting(ctx) && !cctx->tag_set)
725 return -1;
726
727 /* If not set length yet do it */
728 if (!cctx->len_set) {
729 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
730 return -1;
731 cctx->len_set = 1;
732 }
733 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
734 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
735 : CRYPTO_ccm128_encrypt(ccm, in, out, len))
736 return -1;
737 cctx->tag_set = 1;
738 return len;
739 } else {
740 int rv = -1;
741 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
742 cctx->str) :
743 !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
744 unsigned char tag[16];
745 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
746 if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),
747 cctx->M))
748 rv = len;
749 }
750 }
751 if (rv == -1)
752 OPENSSL_cleanse(out, len);
753 cctx->iv_set = 0;
754 cctx->tag_set = 0;
755 cctx->len_set = 0;
756 return rv;
757 }
758 }
759
760 #define aria_ccm_cleanup NULL
761
762 #define ARIA_AUTH_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
763 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
764 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
765 | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \
766 | EVP_CIPH_CUSTOM_IV_LENGTH)
767
768 #define BLOCK_CIPHER_aead(keylen,mode,MODE) \
769 static const EVP_CIPHER aria_##keylen##_##mode = { \
770 NID_aria_##keylen##_##mode, \
771 1, keylen/8, 12, \
772 ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE, \
773 EVP_ORIG_GLOBAL, \
774 aria_##mode##_init_key, \
775 aria_##mode##_cipher, \
776 aria_##mode##_cleanup, \
777 sizeof(EVP_ARIA_##MODE##_CTX), \
778 NULL,NULL,aria_##mode##_ctrl,NULL }; \
779 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
780 { return (EVP_CIPHER*)&aria_##keylen##_##mode; }
781
782 BLOCK_CIPHER_aead(128, gcm, GCM)
783 BLOCK_CIPHER_aead(192, gcm, GCM)
784 BLOCK_CIPHER_aead(256, gcm, GCM)
785
786 BLOCK_CIPHER_aead(128, ccm, CCM)
787 BLOCK_CIPHER_aead(192, ccm, CCM)
788 BLOCK_CIPHER_aead(256, ccm, CCM)
789
790 #endif
791
