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d42d0a4d | 1 | /* |
39147079 | 2 | * Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved. |
5aba2b6e | 3 | * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
d42d0a4d | 4 | * |
4a8b0c55 | 5 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
d42d0a4d P |
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 | 15 | # include <openssl/rand.h> |
25f2138b DMSP |
16 | # include "crypto/aria.h" |
17 | # include "crypto/evp.h" | |
18 | # include "crypto/modes.h" | |
706457b7 | 19 | # include "evp_local.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 { | |
39147079 | 29 | OSSL_UNION_ALIGN; |
bc326738 JS |
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 { | |
39147079 | 45 | OSSL_UNION_ALIGN; |
bc326738 JS |
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 | ||
ddce5c29 | 176 | CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv, |
d42d0a4d P |
177 | EVP_CIPHER_CTX_buf_noconst(ctx), &num, |
178 | (block128_f) aria_encrypt); | |
179 | EVP_CIPHER_CTX_set_num(ctx, num); | |
180 | return 1; | |
181 | } | |
182 | ||
183 | BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0) | |
184 | BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0) | |
185 | BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0) | |
186 | ||
bc326738 JS |
187 | /* Authenticated cipher modes (GCM/CCM) */ |
188 | ||
189 | /* increment counter (64-bit int) by 1 */ | |
190 | static void ctr64_inc(unsigned char *counter) | |
191 | { | |
192 | int n = 8; | |
193 | unsigned char c; | |
194 | ||
195 | do { | |
196 | --n; | |
197 | c = counter[n]; | |
198 | ++c; | |
199 | counter[n] = c; | |
200 | if (c) | |
201 | return; | |
202 | } while (n); | |
203 | } | |
204 | ||
205 | static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
206 | const unsigned char *iv, int enc) | |
207 | { | |
208 | int ret; | |
209 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
210 | ||
211 | if (!iv && !key) | |
212 | return 1; | |
213 | if (key) { | |
214 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
215 | &gctx->ks.ks); | |
216 | CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, | |
217 | (block128_f) aria_encrypt); | |
218 | if (ret < 0) { | |
219 | EVPerr(EVP_F_ARIA_GCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | /* | |
224 | * If we have an iv can set it directly, otherwise use saved IV. | |
225 | */ | |
226 | if (iv == NULL && gctx->iv_set) | |
227 | iv = gctx->iv; | |
228 | if (iv) { | |
229 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); | |
230 | gctx->iv_set = 1; | |
231 | } | |
232 | gctx->key_set = 1; | |
233 | } else { | |
234 | /* If key set use IV, otherwise copy */ | |
235 | if (gctx->key_set) | |
236 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); | |
237 | else | |
238 | memcpy(gctx->iv, iv, gctx->ivlen); | |
239 | gctx->iv_set = 1; | |
240 | gctx->iv_gen = 0; | |
241 | } | |
242 | return 1; | |
243 | } | |
244 | ||
245 | static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
246 | { | |
247 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,c); | |
248 | ||
249 | switch (type) { | |
250 | case EVP_CTRL_INIT: | |
251 | gctx->key_set = 0; | |
252 | gctx->iv_set = 0; | |
7dddf2fc | 253 | gctx->ivlen = EVP_CIPHER_iv_length(c->cipher); |
ddce5c29 | 254 | gctx->iv = c->iv; |
bc326738 JS |
255 | gctx->taglen = -1; |
256 | gctx->iv_gen = 0; | |
257 | gctx->tls_aad_len = -1; | |
258 | return 1; | |
259 | ||
7dddf2fc SL |
260 | case EVP_CTRL_GET_IVLEN: |
261 | *(int *)ptr = gctx->ivlen; | |
262 | return 1; | |
263 | ||
bc326738 JS |
264 | case EVP_CTRL_AEAD_SET_IVLEN: |
265 | if (arg <= 0) | |
266 | return 0; | |
267 | /* Allocate memory for IV if needed */ | |
268 | if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { | |
ddce5c29 | 269 | if (gctx->iv != c->iv) |
bc326738 | 270 | OPENSSL_free(gctx->iv); |
cdb10bae RS |
271 | if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) { |
272 | EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE); | |
bc326738 | 273 | return 0; |
cdb10bae | 274 | } |
bc326738 JS |
275 | } |
276 | gctx->ivlen = arg; | |
277 | return 1; | |
278 | ||
279 | case EVP_CTRL_AEAD_SET_TAG: | |
280 | if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c)) | |
281 | return 0; | |
282 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
283 | gctx->taglen = arg; | |
284 | return 1; | |
285 | ||
286 | case EVP_CTRL_AEAD_GET_TAG: | |
287 | if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c) | |
288 | || gctx->taglen < 0) | |
289 | return 0; | |
290 | memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg); | |
291 | return 1; | |
292 | ||
293 | case EVP_CTRL_GCM_SET_IV_FIXED: | |
294 | /* Special case: -1 length restores whole IV */ | |
295 | if (arg == -1) { | |
296 | memcpy(gctx->iv, ptr, gctx->ivlen); | |
297 | gctx->iv_gen = 1; | |
298 | return 1; | |
299 | } | |
300 | /* | |
301 | * Fixed field must be at least 4 bytes and invocation field at least | |
302 | * 8. | |
303 | */ | |
304 | if ((arg < 4) || (gctx->ivlen - arg) < 8) | |
305 | return 0; | |
306 | if (arg) | |
307 | memcpy(gctx->iv, ptr, arg); | |
16cfc2c9 KR |
308 | if (EVP_CIPHER_CTX_encrypting(c) |
309 | && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) | |
310 | return 0; | |
bc326738 JS |
311 | gctx->iv_gen = 1; |
312 | return 1; | |
313 | ||
314 | case EVP_CTRL_GCM_IV_GEN: | |
315 | if (gctx->iv_gen == 0 || gctx->key_set == 0) | |
316 | return 0; | |
317 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); | |
318 | if (arg <= 0 || arg > gctx->ivlen) | |
319 | arg = gctx->ivlen; | |
320 | memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); | |
321 | /* | |
322 | * Invocation field will be at least 8 bytes in size and so no need | |
323 | * to check wrap around or increment more than last 8 bytes. | |
324 | */ | |
325 | ctr64_inc(gctx->iv + gctx->ivlen - 8); | |
326 | gctx->iv_set = 1; | |
327 | return 1; | |
328 | ||
329 | case EVP_CTRL_GCM_SET_IV_INV: | |
330 | if (gctx->iv_gen == 0 || gctx->key_set == 0 | |
331 | || EVP_CIPHER_CTX_encrypting(c)) | |
332 | return 0; | |
333 | memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); | |
334 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); | |
335 | gctx->iv_set = 1; | |
336 | return 1; | |
337 | ||
338 | case EVP_CTRL_AEAD_TLS1_AAD: | |
339 | /* Save the AAD for later use */ | |
340 | if (arg != EVP_AEAD_TLS1_AAD_LEN) | |
341 | return 0; | |
342 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
343 | gctx->tls_aad_len = arg; | |
344 | { | |
345 | unsigned int len = | |
346 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 | |
347 | | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; | |
348 | /* Correct length for explicit IV */ | |
349 | if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN) | |
350 | return 0; | |
351 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
352 | /* If decrypting correct for tag too */ | |
353 | if (!EVP_CIPHER_CTX_encrypting(c)) { | |
354 | if (len < EVP_GCM_TLS_TAG_LEN) | |
355 | return 0; | |
356 | len -= EVP_GCM_TLS_TAG_LEN; | |
357 | } | |
358 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; | |
359 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; | |
360 | } | |
361 | /* Extra padding: tag appended to record */ | |
362 | return EVP_GCM_TLS_TAG_LEN; | |
363 | ||
364 | case EVP_CTRL_COPY: | |
365 | { | |
366 | EVP_CIPHER_CTX *out = ptr; | |
367 | EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX,out); | |
368 | if (gctx->gcm.key) { | |
369 | if (gctx->gcm.key != &gctx->ks) | |
370 | return 0; | |
371 | gctx_out->gcm.key = &gctx_out->ks; | |
372 | } | |
ddce5c29 BK |
373 | if (gctx->iv == c->iv) |
374 | gctx_out->iv = out->iv; | |
bc326738 | 375 | else { |
cdb10bae RS |
376 | if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) { |
377 | EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE); | |
bc326738 | 378 | return 0; |
cdb10bae | 379 | } |
bc326738 JS |
380 | memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); |
381 | } | |
382 | return 1; | |
383 | } | |
384 | ||
385 | default: | |
386 | return -1; | |
387 | ||
388 | } | |
389 | } | |
390 | ||
391 | static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
392 | const unsigned char *in, size_t len) | |
393 | { | |
394 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
395 | int rv = -1; | |
396 | ||
397 | /* Encrypt/decrypt must be performed in place */ | |
398 | if (out != in | |
399 | || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) | |
400 | return -1; | |
401 | /* | |
402 | * Set IV from start of buffer or generate IV and write to start of | |
403 | * buffer. | |
404 | */ | |
405 | if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ? | |
406 | EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, | |
407 | EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) | |
408 | goto err; | |
409 | /* Use saved AAD */ | |
410 | if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), | |
411 | gctx->tls_aad_len)) | |
412 | goto err; | |
413 | /* Fix buffer and length to point to payload */ | |
414 | in += EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
415 | out += EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
416 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; | |
417 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
418 | /* Encrypt payload */ | |
419 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) | |
420 | goto err; | |
421 | out += len; | |
422 | /* Finally write tag */ | |
423 | CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); | |
424 | rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; | |
425 | } else { | |
426 | /* Decrypt */ | |
427 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) | |
428 | goto err; | |
429 | /* Retrieve tag */ | |
430 | CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), | |
431 | EVP_GCM_TLS_TAG_LEN); | |
432 | /* If tag mismatch wipe buffer */ | |
433 | if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len, | |
434 | EVP_GCM_TLS_TAG_LEN)) { | |
435 | OPENSSL_cleanse(out, len); | |
436 | goto err; | |
437 | } | |
438 | rv = len; | |
439 | } | |
440 | ||
441 | err: | |
442 | gctx->iv_set = 0; | |
443 | gctx->tls_aad_len = -1; | |
444 | return rv; | |
445 | } | |
446 | ||
447 | static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
448 | const unsigned char *in, size_t len) | |
449 | { | |
450 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
451 | ||
452 | /* If not set up, return error */ | |
453 | if (!gctx->key_set) | |
454 | return -1; | |
455 | ||
456 | if (gctx->tls_aad_len >= 0) | |
457 | return aria_gcm_tls_cipher(ctx, out, in, len); | |
458 | ||
459 | if (!gctx->iv_set) | |
460 | return -1; | |
461 | if (in) { | |
462 | if (out == NULL) { | |
463 | if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) | |
464 | return -1; | |
465 | } else if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
466 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) | |
467 | return -1; | |
468 | } else { | |
469 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) | |
470 | return -1; | |
471 | } | |
472 | return len; | |
473 | } | |
474 | if (!EVP_CIPHER_CTX_encrypting(ctx)) { | |
475 | if (gctx->taglen < 0) | |
476 | return -1; | |
477 | if (CRYPTO_gcm128_finish(&gctx->gcm, | |
478 | EVP_CIPHER_CTX_buf_noconst(ctx), | |
479 | gctx->taglen) != 0) | |
480 | return -1; | |
481 | gctx->iv_set = 0; | |
482 | return 0; | |
483 | } | |
484 | CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16); | |
485 | gctx->taglen = 16; | |
486 | /* Don't reuse the IV */ | |
487 | gctx->iv_set = 0; | |
488 | return 0; | |
489 | } | |
490 | ||
183f52e2 MC |
491 | static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx) |
492 | { | |
493 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx); | |
494 | ||
ddce5c29 | 495 | if (gctx->iv != ctx->iv) |
183f52e2 MC |
496 | OPENSSL_free(gctx->iv); |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
bc326738 JS |
501 | static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
502 | const unsigned char *iv, int enc) | |
503 | { | |
504 | int ret; | |
505 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
506 | ||
507 | if (!iv && !key) | |
508 | return 1; | |
509 | ||
510 | if (key) { | |
511 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
512 | &cctx->ks.ks); | |
513 | CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, | |
514 | &cctx->ks, (block128_f) aria_encrypt); | |
515 | if (ret < 0) { | |
516 | EVPerr(EVP_F_ARIA_CCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
517 | return 0; | |
518 | } | |
519 | cctx->str = NULL; | |
520 | cctx->key_set = 1; | |
521 | } | |
522 | if (iv) { | |
ddce5c29 | 523 | memcpy(ctx->iv, iv, 15 - cctx->L); |
bc326738 JS |
524 | cctx->iv_set = 1; |
525 | } | |
526 | return 1; | |
527 | } | |
528 | ||
529 | static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
530 | { | |
531 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,c); | |
532 | ||
533 | switch (type) { | |
534 | case EVP_CTRL_INIT: | |
535 | cctx->key_set = 0; | |
536 | cctx->iv_set = 0; | |
537 | cctx->L = 8; | |
538 | cctx->M = 12; | |
539 | cctx->tag_set = 0; | |
540 | cctx->len_set = 0; | |
541 | cctx->tls_aad_len = -1; | |
542 | return 1; | |
543 | ||
7dddf2fc SL |
544 | case EVP_CTRL_GET_IVLEN: |
545 | *(int *)ptr = 15 - cctx->L; | |
546 | return 1; | |
547 | ||
bc326738 JS |
548 | case EVP_CTRL_AEAD_TLS1_AAD: |
549 | /* Save the AAD for later use */ | |
550 | if (arg != EVP_AEAD_TLS1_AAD_LEN) | |
551 | return 0; | |
552 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
553 | cctx->tls_aad_len = arg; | |
554 | { | |
555 | uint16_t len = | |
556 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 | |
557 | | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; | |
558 | /* Correct length for explicit IV */ | |
559 | if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN) | |
560 | return 0; | |
561 | len -= EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
562 | /* If decrypting correct for tag too */ | |
563 | if (!EVP_CIPHER_CTX_encrypting(c)) { | |
564 | if (len < cctx->M) | |
565 | return 0; | |
566 | len -= cctx->M; | |
567 | } | |
568 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; | |
569 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; | |
570 | } | |
571 | /* Extra padding: tag appended to record */ | |
572 | return cctx->M; | |
573 | ||
574 | case EVP_CTRL_CCM_SET_IV_FIXED: | |
575 | /* Sanity check length */ | |
576 | if (arg != EVP_CCM_TLS_FIXED_IV_LEN) | |
577 | return 0; | |
578 | /* Just copy to first part of IV */ | |
ddce5c29 | 579 | memcpy(c->iv, ptr, arg); |
bc326738 JS |
580 | return 1; |
581 | ||
582 | case EVP_CTRL_AEAD_SET_IVLEN: | |
583 | arg = 15 - arg; | |
584 | /* fall thru */ | |
585 | case EVP_CTRL_CCM_SET_L: | |
586 | if (arg < 2 || arg > 8) | |
587 | return 0; | |
588 | cctx->L = arg; | |
589 | return 1; | |
590 | case EVP_CTRL_AEAD_SET_TAG: | |
591 | if ((arg & 1) || arg < 4 || arg > 16) | |
592 | return 0; | |
593 | if (EVP_CIPHER_CTX_encrypting(c) && ptr) | |
594 | return 0; | |
595 | if (ptr) { | |
596 | cctx->tag_set = 1; | |
597 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
598 | } | |
599 | cctx->M = arg; | |
600 | return 1; | |
601 | ||
602 | case EVP_CTRL_AEAD_GET_TAG: | |
603 | if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set) | |
604 | return 0; | |
605 | if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) | |
606 | return 0; | |
607 | cctx->tag_set = 0; | |
608 | cctx->iv_set = 0; | |
609 | cctx->len_set = 0; | |
610 | return 1; | |
611 | ||
612 | case EVP_CTRL_COPY: | |
613 | { | |
614 | EVP_CIPHER_CTX *out = ptr; | |
615 | EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX,out); | |
616 | if (cctx->ccm.key) { | |
617 | if (cctx->ccm.key != &cctx->ks) | |
618 | return 0; | |
619 | cctx_out->ccm.key = &cctx_out->ks; | |
620 | } | |
621 | return 1; | |
622 | } | |
623 | ||
624 | default: | |
625 | return -1; | |
626 | } | |
627 | } | |
628 | ||
629 | static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
630 | const unsigned char *in, size_t len) | |
631 | { | |
632 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
633 | CCM128_CONTEXT *ccm = &cctx->ccm; | |
634 | ||
635 | /* Encrypt/decrypt must be performed in place */ | |
636 | if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M)) | |
637 | return -1; | |
638 | /* If encrypting set explicit IV from sequence number (start of AAD) */ | |
639 | if (EVP_CIPHER_CTX_encrypting(ctx)) | |
640 | memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx), | |
641 | EVP_CCM_TLS_EXPLICIT_IV_LEN); | |
642 | /* Get rest of IV from explicit IV */ | |
ddce5c29 | 643 | memcpy(ctx->iv + EVP_CCM_TLS_FIXED_IV_LEN, in, |
bc326738 JS |
644 | EVP_CCM_TLS_EXPLICIT_IV_LEN); |
645 | /* Correct length value */ | |
646 | len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; | |
ddce5c29 | 647 | if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, |
bc326738 JS |
648 | len)) |
649 | return -1; | |
650 | /* Use saved AAD */ | |
651 | CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len); | |
652 | /* Fix buffer to point to payload */ | |
653 | in += EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
654 | out += EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
655 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
656 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) | |
657 | : CRYPTO_ccm128_encrypt(ccm, in, out, len)) | |
658 | return -1; | |
659 | if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M)) | |
660 | return -1; | |
661 | return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; | |
662 | } else { | |
663 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str) | |
664 | : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { | |
665 | unsigned char tag[16]; | |
666 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { | |
667 | if (!CRYPTO_memcmp(tag, in + len, cctx->M)) | |
668 | return len; | |
669 | } | |
670 | } | |
671 | OPENSSL_cleanse(out, len); | |
672 | return -1; | |
673 | } | |
674 | } | |
675 | ||
676 | static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
677 | const unsigned char *in, size_t len) | |
678 | { | |
679 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
680 | CCM128_CONTEXT *ccm = &cctx->ccm; | |
681 | ||
682 | /* If not set up, return error */ | |
683 | if (!cctx->key_set) | |
684 | return -1; | |
685 | ||
686 | if (cctx->tls_aad_len >= 0) | |
687 | return aria_ccm_tls_cipher(ctx, out, in, len); | |
688 | ||
689 | /* EVP_*Final() doesn't return any data */ | |
690 | if (in == NULL && out != NULL) | |
691 | return 0; | |
692 | ||
693 | if (!cctx->iv_set) | |
694 | return -1; | |
695 | ||
bc326738 JS |
696 | if (!out) { |
697 | if (!in) { | |
ddce5c29 | 698 | if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
bc326738 JS |
699 | return -1; |
700 | cctx->len_set = 1; | |
701 | return len; | |
702 | } | |
703 | /* If have AAD need message length */ | |
704 | if (!cctx->len_set && len) | |
705 | return -1; | |
706 | CRYPTO_ccm128_aad(ccm, in, len); | |
707 | return len; | |
708 | } | |
f7382fbb PS |
709 | |
710 | /* The tag must be set before actually decrypting data */ | |
711 | if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set) | |
712 | return -1; | |
713 | ||
bc326738 JS |
714 | /* If not set length yet do it */ |
715 | if (!cctx->len_set) { | |
ddce5c29 | 716 | if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
bc326738 JS |
717 | return -1; |
718 | cctx->len_set = 1; | |
719 | } | |
720 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
721 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) | |
722 | : CRYPTO_ccm128_encrypt(ccm, in, out, len)) | |
723 | return -1; | |
724 | cctx->tag_set = 1; | |
725 | return len; | |
726 | } else { | |
727 | int rv = -1; | |
728 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, | |
729 | cctx->str) : | |
730 | !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { | |
731 | unsigned char tag[16]; | |
732 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { | |
733 | if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx), | |
734 | cctx->M)) | |
735 | rv = len; | |
736 | } | |
737 | } | |
738 | if (rv == -1) | |
739 | OPENSSL_cleanse(out, len); | |
740 | cctx->iv_set = 0; | |
741 | cctx->tag_set = 0; | |
742 | cctx->len_set = 0; | |
743 | return rv; | |
744 | } | |
745 | } | |
746 | ||
183f52e2 MC |
747 | #define aria_ccm_cleanup NULL |
748 | ||
bc326738 JS |
749 | #define ARIA_AUTH_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ |
750 | | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ | |
751 | | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ | |
7dddf2fc SL |
752 | | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \ |
753 | | EVP_CIPH_CUSTOM_IV_LENGTH) | |
bc326738 JS |
754 | |
755 | #define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ | |
756 | static const EVP_CIPHER aria_##keylen##_##mode = { \ | |
757 | nid##_##keylen##_##nmode, \ | |
758 | blocksize, keylen/8, ivlen, \ | |
759 | ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE, \ | |
760 | aria_##mode##_init_key, \ | |
761 | aria_##mode##_cipher, \ | |
183f52e2 | 762 | aria_##mode##_cleanup, \ |
bc326738 JS |
763 | sizeof(EVP_ARIA_##MODE##_CTX), \ |
764 | NULL,NULL,aria_##mode##_ctrl,NULL }; \ | |
765 | const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ | |
766 | { return (EVP_CIPHER*)&aria_##keylen##_##mode; } | |
767 | ||
768 | BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0) | |
769 | BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0) | |
770 | BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0) | |
771 | ||
772 | BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0) | |
773 | BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0) | |
774 | BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0) | |
775 | ||
d42d0a4d | 776 | #endif |