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d42d0a4d | 1 | /* |
50c9ac07 | 2 | * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. |
5aba2b6e | 3 | * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
d42d0a4d P |
4 | * |
5 | * Licensed under the OpenSSL license (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 | ||
d42d0a4d P |
11 | #include "internal/cryptlib.h" |
12 | #ifndef OPENSSL_NO_ARIA | |
13 | # include <openssl/evp.h> | |
14 | # include <openssl/modes.h> | |
bc326738 JS |
15 | # include <openssl/rand.h> |
16 | # include "internal/aria.h" | |
d42d0a4d | 17 | # include "internal/evp_int.h" |
bc326738 JS |
18 | # include "modes_lcl.h" |
19 | # include "evp_locl.h" | |
d42d0a4d P |
20 | |
21 | /* ARIA subkey Structure */ | |
22 | typedef struct { | |
23 | ARIA_KEY ks; | |
24 | } EVP_ARIA_KEY; | |
25 | ||
bc326738 JS |
26 | /* ARIA GCM context */ |
27 | typedef struct { | |
28 | union { | |
29 | double align; | |
30 | ARIA_KEY ks; | |
31 | } ks; /* ARIA subkey to use */ | |
32 | int key_set; /* Set if key initialised */ | |
33 | int iv_set; /* Set if an iv is set */ | |
34 | GCM128_CONTEXT gcm; | |
35 | unsigned char *iv; /* Temporary IV store */ | |
36 | int ivlen; /* IV length */ | |
37 | int taglen; | |
38 | int iv_gen; /* It is OK to generate IVs */ | |
39 | int tls_aad_len; /* TLS AAD length */ | |
40 | } EVP_ARIA_GCM_CTX; | |
41 | ||
42 | /* ARIA CCM context */ | |
43 | typedef struct { | |
44 | union { | |
45 | double align; | |
46 | ARIA_KEY ks; | |
47 | } ks; /* ARIA key schedule to use */ | |
48 | int key_set; /* Set if key initialised */ | |
49 | int iv_set; /* Set if an iv is set */ | |
50 | int tag_set; /* Set if tag is valid */ | |
51 | int len_set; /* Set if message length set */ | |
52 | int L, M; /* L and M parameters from RFC3610 */ | |
53 | int tls_aad_len; /* TLS AAD length */ | |
54 | CCM128_CONTEXT ccm; | |
55 | ccm128_f str; | |
56 | } EVP_ARIA_CCM_CTX; | |
57 | ||
d42d0a4d P |
58 | /* The subkey for ARIA is generated. */ |
59 | static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
60 | const unsigned char *iv, int enc) | |
61 | { | |
62 | int ret; | |
63 | int mode = EVP_CIPHER_CTX_mode(ctx); | |
64 | ||
65 | if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE)) | |
66 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
67 | EVP_CIPHER_CTX_get_cipher_data(ctx)); | |
68 | else | |
69 | ret = aria_set_decrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
70 | EVP_CIPHER_CTX_get_cipher_data(ctx)); | |
71 | if (ret < 0) { | |
72 | EVPerr(EVP_F_ARIA_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
73 | return 0; | |
74 | } | |
75 | return 1; | |
76 | } | |
77 | ||
78 | static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out, | |
79 | size_t len, const ARIA_KEY *key, | |
80 | unsigned char *ivec, const int enc) | |
81 | { | |
82 | ||
83 | if (enc) | |
84 | CRYPTO_cbc128_encrypt(in, out, len, key, ivec, | |
85 | (block128_f) aria_encrypt); | |
86 | else | |
87 | CRYPTO_cbc128_decrypt(in, out, len, key, ivec, | |
88 | (block128_f) aria_encrypt); | |
89 | } | |
90 | ||
91 | static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out, | |
92 | size_t length, const ARIA_KEY *key, | |
93 | unsigned char *ivec, int *num, const int enc) | |
94 | { | |
95 | ||
96 | CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc, | |
97 | (block128_f) aria_encrypt); | |
98 | } | |
99 | ||
100 | static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out, | |
101 | size_t length, const ARIA_KEY *key, | |
102 | unsigned char *ivec, int *num, const int enc) | |
103 | { | |
104 | CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc, | |
105 | (block128_f) aria_encrypt); | |
106 | } | |
107 | ||
108 | static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out, | |
109 | size_t length, const ARIA_KEY *key, | |
110 | unsigned char *ivec, int *num, const int enc) | |
111 | { | |
112 | CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc, | |
113 | (block128_f) aria_encrypt); | |
114 | } | |
115 | ||
116 | static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out, | |
117 | const ARIA_KEY *key, const int enc) | |
118 | { | |
119 | aria_encrypt(in, out, key); | |
120 | } | |
121 | ||
122 | static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out, | |
123 | size_t length, const ARIA_KEY *key, | |
124 | unsigned char *ivec, int *num) | |
125 | { | |
126 | CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num, | |
127 | (block128_f) aria_encrypt); | |
128 | } | |
129 | ||
130 | IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY, | |
131 | NID_aria_128, 16, 16, 16, 128, | |
132 | 0, aria_init_key, NULL, | |
133 | EVP_CIPHER_set_asn1_iv, | |
134 | EVP_CIPHER_get_asn1_iv, | |
135 | NULL) | |
136 | IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY, | |
137 | NID_aria_192, 16, 24, 16, 128, | |
138 | 0, aria_init_key, NULL, | |
139 | EVP_CIPHER_set_asn1_iv, | |
140 | EVP_CIPHER_get_asn1_iv, | |
141 | NULL) | |
142 | IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY, | |
143 | NID_aria_256, 16, 32, 16, 128, | |
144 | 0, aria_init_key, NULL, | |
145 | EVP_CIPHER_set_asn1_iv, | |
146 | EVP_CIPHER_get_asn1_iv, | |
147 | NULL) | |
148 | ||
149 | # define IMPLEMENT_ARIA_CFBR(ksize,cbits) \ | |
150 | IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0) | |
151 | IMPLEMENT_ARIA_CFBR(128,1) | |
152 | IMPLEMENT_ARIA_CFBR(192,1) | |
153 | IMPLEMENT_ARIA_CFBR(256,1) | |
154 | IMPLEMENT_ARIA_CFBR(128,8) | |
155 | IMPLEMENT_ARIA_CFBR(192,8) | |
156 | IMPLEMENT_ARIA_CFBR(256,8) | |
157 | ||
158 | # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ | |
159 | static const EVP_CIPHER aria_##keylen##_##mode = { \ | |
160 | nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ | |
161 | flags|EVP_CIPH_##MODE##_MODE, \ | |
162 | aria_init_key, \ | |
163 | aria_##mode##_cipher, \ | |
164 | NULL, \ | |
165 | sizeof(EVP_ARIA_KEY), \ | |
166 | NULL,NULL,NULL,NULL }; \ | |
167 | const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ | |
168 | { return &aria_##keylen##_##mode; } | |
169 | ||
170 | static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
171 | const unsigned char *in, size_t len) | |
172 | { | |
173 | unsigned int num = EVP_CIPHER_CTX_num(ctx); | |
174 | EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY,ctx); | |
175 | ||
176 | CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, | |
177 | EVP_CIPHER_CTX_iv_noconst(ctx), | |
178 | EVP_CIPHER_CTX_buf_noconst(ctx), &num, | |
179 | (block128_f) aria_encrypt); | |
180 | EVP_CIPHER_CTX_set_num(ctx, num); | |
181 | return 1; | |
182 | } | |
183 | ||
184 | BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0) | |
185 | BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0) | |
186 | BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0) | |
187 | ||
bc326738 JS |
188 | /* Authenticated cipher modes (GCM/CCM) */ |
189 | ||
190 | /* increment counter (64-bit int) by 1 */ | |
191 | static void ctr64_inc(unsigned char *counter) | |
192 | { | |
193 | int n = 8; | |
194 | unsigned char c; | |
195 | ||
196 | do { | |
197 | --n; | |
198 | c = counter[n]; | |
199 | ++c; | |
200 | counter[n] = c; | |
201 | if (c) | |
202 | return; | |
203 | } while (n); | |
204 | } | |
205 | ||
206 | static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
207 | const unsigned char *iv, int enc) | |
208 | { | |
209 | int ret; | |
210 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
211 | ||
212 | if (!iv && !key) | |
213 | return 1; | |
214 | if (key) { | |
215 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
216 | &gctx->ks.ks); | |
217 | CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, | |
218 | (block128_f) aria_encrypt); | |
219 | if (ret < 0) { | |
220 | EVPerr(EVP_F_ARIA_GCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
221 | return 0; | |
222 | } | |
223 | ||
224 | /* | |
225 | * If we have an iv can set it directly, otherwise use saved IV. | |
226 | */ | |
227 | if (iv == NULL && gctx->iv_set) | |
228 | iv = gctx->iv; | |
229 | if (iv) { | |
230 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); | |
231 | gctx->iv_set = 1; | |
232 | } | |
233 | gctx->key_set = 1; | |
234 | } else { | |
235 | /* If key set use IV, otherwise copy */ | |
236 | if (gctx->key_set) | |
237 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); | |
238 | else | |
239 | memcpy(gctx->iv, iv, gctx->ivlen); | |
240 | gctx->iv_set = 1; | |
241 | gctx->iv_gen = 0; | |
242 | } | |
243 | return 1; | |
244 | } | |
245 | ||
246 | static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
247 | { | |
248 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,c); | |
249 | ||
250 | switch (type) { | |
251 | case EVP_CTRL_INIT: | |
252 | gctx->key_set = 0; | |
253 | gctx->iv_set = 0; | |
254 | gctx->ivlen = EVP_CIPHER_CTX_iv_length(c); | |
255 | gctx->iv = EVP_CIPHER_CTX_iv_noconst(c); | |
256 | gctx->taglen = -1; | |
257 | gctx->iv_gen = 0; | |
258 | gctx->tls_aad_len = -1; | |
259 | return 1; | |
260 | ||
261 | case EVP_CTRL_AEAD_SET_IVLEN: | |
262 | if (arg <= 0) | |
263 | return 0; | |
264 | /* Allocate memory for IV if needed */ | |
265 | if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { | |
266 | if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(c)) | |
267 | OPENSSL_free(gctx->iv); | |
268 | gctx->iv = OPENSSL_malloc(arg); | |
269 | if (gctx->iv == NULL) | |
270 | return 0; | |
271 | } | |
272 | gctx->ivlen = arg; | |
273 | return 1; | |
274 | ||
275 | case EVP_CTRL_AEAD_SET_TAG: | |
276 | if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c)) | |
277 | return 0; | |
278 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
279 | gctx->taglen = arg; | |
280 | return 1; | |
281 | ||
282 | case EVP_CTRL_AEAD_GET_TAG: | |
283 | if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c) | |
284 | || gctx->taglen < 0) | |
285 | return 0; | |
286 | memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg); | |
287 | return 1; | |
288 | ||
289 | case EVP_CTRL_GCM_SET_IV_FIXED: | |
290 | /* Special case: -1 length restores whole IV */ | |
291 | if (arg == -1) { | |
292 | memcpy(gctx->iv, ptr, gctx->ivlen); | |
293 | gctx->iv_gen = 1; | |
294 | return 1; | |
295 | } | |
296 | /* | |
297 | * Fixed field must be at least 4 bytes and invocation field at least | |
298 | * 8. | |
299 | */ | |
300 | if ((arg < 4) || (gctx->ivlen - arg) < 8) | |
301 | return 0; | |
302 | if (arg) | |
303 | memcpy(gctx->iv, ptr, arg); | |
304 | if (EVP_CIPHER_CTX_encrypting(c) | |
305 | && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) | |
306 | return 0; | |
307 | gctx->iv_gen = 1; | |
308 | return 1; | |
309 | ||
310 | case EVP_CTRL_GCM_IV_GEN: | |
311 | if (gctx->iv_gen == 0 || gctx->key_set == 0) | |
312 | return 0; | |
313 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); | |
314 | if (arg <= 0 || arg > gctx->ivlen) | |
315 | arg = gctx->ivlen; | |
316 | memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); | |
317 | /* | |
318 | * Invocation field will be at least 8 bytes in size and so no need | |
319 | * to check wrap around or increment more than last 8 bytes. | |
320 | */ | |
321 | ctr64_inc(gctx->iv + gctx->ivlen - 8); | |
322 | gctx->iv_set = 1; | |
323 | return 1; | |
324 | ||
325 | case EVP_CTRL_GCM_SET_IV_INV: | |
326 | if (gctx->iv_gen == 0 || gctx->key_set == 0 | |
327 | || EVP_CIPHER_CTX_encrypting(c)) | |
328 | return 0; | |
329 | memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); | |
330 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); | |
331 | gctx->iv_set = 1; | |
332 | return 1; | |
333 | ||
334 | case EVP_CTRL_AEAD_TLS1_AAD: | |
335 | /* Save the AAD for later use */ | |
336 | if (arg != EVP_AEAD_TLS1_AAD_LEN) | |
337 | return 0; | |
338 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
339 | gctx->tls_aad_len = arg; | |
340 | { | |
341 | unsigned int len = | |
342 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 | |
343 | | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; | |
344 | /* Correct length for explicit IV */ | |
345 | if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN) | |
346 | return 0; | |
347 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
348 | /* If decrypting correct for tag too */ | |
349 | if (!EVP_CIPHER_CTX_encrypting(c)) { | |
350 | if (len < EVP_GCM_TLS_TAG_LEN) | |
351 | return 0; | |
352 | len -= EVP_GCM_TLS_TAG_LEN; | |
353 | } | |
354 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; | |
355 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; | |
356 | } | |
357 | /* Extra padding: tag appended to record */ | |
358 | return EVP_GCM_TLS_TAG_LEN; | |
359 | ||
360 | case EVP_CTRL_COPY: | |
361 | { | |
362 | EVP_CIPHER_CTX *out = ptr; | |
363 | EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX,out); | |
364 | if (gctx->gcm.key) { | |
365 | if (gctx->gcm.key != &gctx->ks) | |
366 | return 0; | |
367 | gctx_out->gcm.key = &gctx_out->ks; | |
368 | } | |
369 | if (gctx->iv == EVP_CIPHER_CTX_iv_noconst(c)) | |
370 | gctx_out->iv = EVP_CIPHER_CTX_iv_noconst(out); | |
371 | else { | |
372 | gctx_out->iv = OPENSSL_malloc(gctx->ivlen); | |
373 | if (gctx_out->iv == NULL) | |
374 | return 0; | |
375 | memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); | |
376 | } | |
377 | return 1; | |
378 | } | |
379 | ||
380 | default: | |
381 | return -1; | |
382 | ||
383 | } | |
384 | } | |
385 | ||
386 | static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
387 | const unsigned char *in, size_t len) | |
388 | { | |
389 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
390 | int rv = -1; | |
391 | ||
392 | /* Encrypt/decrypt must be performed in place */ | |
393 | if (out != in | |
394 | || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) | |
395 | return -1; | |
396 | /* | |
397 | * Set IV from start of buffer or generate IV and write to start of | |
398 | * buffer. | |
399 | */ | |
400 | if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ? | |
401 | EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, | |
402 | EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) | |
403 | goto err; | |
404 | /* Use saved AAD */ | |
405 | if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), | |
406 | gctx->tls_aad_len)) | |
407 | goto err; | |
408 | /* Fix buffer and length to point to payload */ | |
409 | in += EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
410 | out += EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
411 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; | |
412 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
413 | /* Encrypt payload */ | |
414 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) | |
415 | goto err; | |
416 | out += len; | |
417 | /* Finally write tag */ | |
418 | CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); | |
419 | rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; | |
420 | } else { | |
421 | /* Decrypt */ | |
422 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) | |
423 | goto err; | |
424 | /* Retrieve tag */ | |
425 | CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), | |
426 | EVP_GCM_TLS_TAG_LEN); | |
427 | /* If tag mismatch wipe buffer */ | |
428 | if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len, | |
429 | EVP_GCM_TLS_TAG_LEN)) { | |
430 | OPENSSL_cleanse(out, len); | |
431 | goto err; | |
432 | } | |
433 | rv = len; | |
434 | } | |
435 | ||
436 | err: | |
437 | gctx->iv_set = 0; | |
438 | gctx->tls_aad_len = -1; | |
439 | return rv; | |
440 | } | |
441 | ||
442 | static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
443 | const unsigned char *in, size_t len) | |
444 | { | |
445 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
446 | ||
447 | /* If not set up, return error */ | |
448 | if (!gctx->key_set) | |
449 | return -1; | |
450 | ||
451 | if (gctx->tls_aad_len >= 0) | |
452 | return aria_gcm_tls_cipher(ctx, out, in, len); | |
453 | ||
454 | if (!gctx->iv_set) | |
455 | return -1; | |
456 | if (in) { | |
457 | if (out == NULL) { | |
458 | if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) | |
459 | return -1; | |
460 | } else if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
461 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) | |
462 | return -1; | |
463 | } else { | |
464 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) | |
465 | return -1; | |
466 | } | |
467 | return len; | |
468 | } | |
469 | if (!EVP_CIPHER_CTX_encrypting(ctx)) { | |
470 | if (gctx->taglen < 0) | |
471 | return -1; | |
472 | if (CRYPTO_gcm128_finish(&gctx->gcm, | |
473 | EVP_CIPHER_CTX_buf_noconst(ctx), | |
474 | gctx->taglen) != 0) | |
475 | return -1; | |
476 | gctx->iv_set = 0; | |
477 | return 0; | |
478 | } | |
479 | CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16); | |
480 | gctx->taglen = 16; | |
481 | /* Don't reuse the IV */ | |
482 | gctx->iv_set = 0; | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
487 | const unsigned char *iv, int enc) | |
488 | { | |
489 | int ret; | |
490 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
491 | ||
492 | if (!iv && !key) | |
493 | return 1; | |
494 | ||
495 | if (key) { | |
496 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
497 | &cctx->ks.ks); | |
498 | CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, | |
499 | &cctx->ks, (block128_f) aria_encrypt); | |
500 | if (ret < 0) { | |
501 | EVPerr(EVP_F_ARIA_CCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
502 | return 0; | |
503 | } | |
504 | cctx->str = NULL; | |
505 | cctx->key_set = 1; | |
506 | } | |
507 | if (iv) { | |
508 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L); | |
509 | cctx->iv_set = 1; | |
510 | } | |
511 | return 1; | |
512 | } | |
513 | ||
514 | static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
515 | { | |
516 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,c); | |
517 | ||
518 | switch (type) { | |
519 | case EVP_CTRL_INIT: | |
520 | cctx->key_set = 0; | |
521 | cctx->iv_set = 0; | |
522 | cctx->L = 8; | |
523 | cctx->M = 12; | |
524 | cctx->tag_set = 0; | |
525 | cctx->len_set = 0; | |
526 | cctx->tls_aad_len = -1; | |
527 | return 1; | |
528 | ||
529 | case EVP_CTRL_AEAD_TLS1_AAD: | |
530 | /* Save the AAD for later use */ | |
531 | if (arg != EVP_AEAD_TLS1_AAD_LEN) | |
532 | return 0; | |
533 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
534 | cctx->tls_aad_len = arg; | |
535 | { | |
536 | uint16_t len = | |
537 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 | |
538 | | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; | |
539 | /* Correct length for explicit IV */ | |
540 | if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN) | |
541 | return 0; | |
542 | len -= EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
543 | /* If decrypting correct for tag too */ | |
544 | if (!EVP_CIPHER_CTX_encrypting(c)) { | |
545 | if (len < cctx->M) | |
546 | return 0; | |
547 | len -= cctx->M; | |
548 | } | |
549 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; | |
550 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; | |
551 | } | |
552 | /* Extra padding: tag appended to record */ | |
553 | return cctx->M; | |
554 | ||
555 | case EVP_CTRL_CCM_SET_IV_FIXED: | |
556 | /* Sanity check length */ | |
557 | if (arg != EVP_CCM_TLS_FIXED_IV_LEN) | |
558 | return 0; | |
559 | /* Just copy to first part of IV */ | |
560 | memcpy(EVP_CIPHER_CTX_iv_noconst(c), ptr, arg); | |
561 | return 1; | |
562 | ||
563 | case EVP_CTRL_AEAD_SET_IVLEN: | |
564 | arg = 15 - arg; | |
565 | /* fall thru */ | |
566 | case EVP_CTRL_CCM_SET_L: | |
567 | if (arg < 2 || arg > 8) | |
568 | return 0; | |
569 | cctx->L = arg; | |
570 | return 1; | |
571 | case EVP_CTRL_AEAD_SET_TAG: | |
572 | if ((arg & 1) || arg < 4 || arg > 16) | |
573 | return 0; | |
574 | if (EVP_CIPHER_CTX_encrypting(c) && ptr) | |
575 | return 0; | |
576 | if (ptr) { | |
577 | cctx->tag_set = 1; | |
578 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
579 | } | |
580 | cctx->M = arg; | |
581 | return 1; | |
582 | ||
583 | case EVP_CTRL_AEAD_GET_TAG: | |
584 | if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set) | |
585 | return 0; | |
586 | if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) | |
587 | return 0; | |
588 | cctx->tag_set = 0; | |
589 | cctx->iv_set = 0; | |
590 | cctx->len_set = 0; | |
591 | return 1; | |
592 | ||
593 | case EVP_CTRL_COPY: | |
594 | { | |
595 | EVP_CIPHER_CTX *out = ptr; | |
596 | EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX,out); | |
597 | if (cctx->ccm.key) { | |
598 | if (cctx->ccm.key != &cctx->ks) | |
599 | return 0; | |
600 | cctx_out->ccm.key = &cctx_out->ks; | |
601 | } | |
602 | return 1; | |
603 | } | |
604 | ||
605 | default: | |
606 | return -1; | |
607 | } | |
608 | } | |
609 | ||
610 | static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
611 | const unsigned char *in, size_t len) | |
612 | { | |
613 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
614 | CCM128_CONTEXT *ccm = &cctx->ccm; | |
615 | ||
616 | /* Encrypt/decrypt must be performed in place */ | |
617 | if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M)) | |
618 | return -1; | |
619 | /* If encrypting set explicit IV from sequence number (start of AAD) */ | |
620 | if (EVP_CIPHER_CTX_encrypting(ctx)) | |
621 | memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx), | |
622 | EVP_CCM_TLS_EXPLICIT_IV_LEN); | |
623 | /* Get rest of IV from explicit IV */ | |
624 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx) + EVP_CCM_TLS_FIXED_IV_LEN, in, | |
625 | EVP_CCM_TLS_EXPLICIT_IV_LEN); | |
626 | /* Correct length value */ | |
627 | len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; | |
628 | if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), 15 - cctx->L, | |
629 | len)) | |
630 | return -1; | |
631 | /* Use saved AAD */ | |
632 | CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len); | |
633 | /* Fix buffer to point to payload */ | |
634 | in += EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
635 | out += EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
636 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
637 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) | |
638 | : CRYPTO_ccm128_encrypt(ccm, in, out, len)) | |
639 | return -1; | |
640 | if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M)) | |
641 | return -1; | |
642 | return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; | |
643 | } else { | |
644 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str) | |
645 | : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { | |
646 | unsigned char tag[16]; | |
647 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { | |
648 | if (!CRYPTO_memcmp(tag, in + len, cctx->M)) | |
649 | return len; | |
650 | } | |
651 | } | |
652 | OPENSSL_cleanse(out, len); | |
653 | return -1; | |
654 | } | |
655 | } | |
656 | ||
657 | static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
658 | const unsigned char *in, size_t len) | |
659 | { | |
660 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
661 | CCM128_CONTEXT *ccm = &cctx->ccm; | |
662 | ||
663 | /* If not set up, return error */ | |
664 | if (!cctx->key_set) | |
665 | return -1; | |
666 | ||
667 | if (cctx->tls_aad_len >= 0) | |
668 | return aria_ccm_tls_cipher(ctx, out, in, len); | |
669 | ||
670 | /* EVP_*Final() doesn't return any data */ | |
671 | if (in == NULL && out != NULL) | |
672 | return 0; | |
673 | ||
674 | if (!cctx->iv_set) | |
675 | return -1; | |
676 | ||
677 | if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set) | |
678 | return -1; | |
679 | if (!out) { | |
680 | if (!in) { | |
681 | if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), | |
682 | 15 - cctx->L, len)) | |
683 | return -1; | |
684 | cctx->len_set = 1; | |
685 | return len; | |
686 | } | |
687 | /* If have AAD need message length */ | |
688 | if (!cctx->len_set && len) | |
689 | return -1; | |
690 | CRYPTO_ccm128_aad(ccm, in, len); | |
691 | return len; | |
692 | } | |
693 | /* If not set length yet do it */ | |
694 | if (!cctx->len_set) { | |
695 | if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), | |
696 | 15 - cctx->L, len)) | |
697 | return -1; | |
698 | cctx->len_set = 1; | |
699 | } | |
700 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
701 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) | |
702 | : CRYPTO_ccm128_encrypt(ccm, in, out, len)) | |
703 | return -1; | |
704 | cctx->tag_set = 1; | |
705 | return len; | |
706 | } else { | |
707 | int rv = -1; | |
708 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, | |
709 | cctx->str) : | |
710 | !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { | |
711 | unsigned char tag[16]; | |
712 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { | |
713 | if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx), | |
714 | cctx->M)) | |
715 | rv = len; | |
716 | } | |
717 | } | |
718 | if (rv == -1) | |
719 | OPENSSL_cleanse(out, len); | |
720 | cctx->iv_set = 0; | |
721 | cctx->tag_set = 0; | |
722 | cctx->len_set = 0; | |
723 | return rv; | |
724 | } | |
725 | } | |
726 | ||
727 | #define ARIA_AUTH_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ | |
728 | | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ | |
729 | | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ | |
730 | | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER) | |
731 | ||
732 | #define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ | |
733 | static const EVP_CIPHER aria_##keylen##_##mode = { \ | |
734 | nid##_##keylen##_##nmode, \ | |
735 | blocksize, keylen/8, ivlen, \ | |
736 | ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE, \ | |
737 | aria_##mode##_init_key, \ | |
738 | aria_##mode##_cipher, \ | |
739 | NULL, \ | |
740 | sizeof(EVP_ARIA_##MODE##_CTX), \ | |
741 | NULL,NULL,aria_##mode##_ctrl,NULL }; \ | |
742 | const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ | |
743 | { return (EVP_CIPHER*)&aria_##keylen##_##mode; } | |
744 | ||
745 | BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0) | |
746 | BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0) | |
747 | BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0) | |
748 | ||
749 | BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0) | |
750 | BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0) | |
751 | BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0) | |
752 | ||
d42d0a4d | 753 | #endif |