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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> |
6decf943 | 16 | # include <openssl/rand_drbg.h> |
25f2138b DMSP |
17 | # include "crypto/aria.h" |
18 | # include "crypto/evp.h" | |
19 | # include "crypto/modes.h" | |
bc326738 | 20 | # include "evp_locl.h" |
d42d0a4d P |
21 | |
22 | /* ARIA subkey Structure */ | |
23 | typedef struct { | |
24 | ARIA_KEY ks; | |
25 | } EVP_ARIA_KEY; | |
26 | ||
bc326738 JS |
27 | /* ARIA GCM context */ |
28 | typedef struct { | |
29 | union { | |
39147079 | 30 | OSSL_UNION_ALIGN; |
bc326738 JS |
31 | ARIA_KEY ks; |
32 | } ks; /* ARIA subkey to use */ | |
33 | int key_set; /* Set if key initialised */ | |
34 | int iv_set; /* Set if an iv is set */ | |
35 | GCM128_CONTEXT gcm; | |
36 | unsigned char *iv; /* Temporary IV store */ | |
37 | int ivlen; /* IV length */ | |
38 | int taglen; | |
39 | int iv_gen; /* It is OK to generate IVs */ | |
40 | int tls_aad_len; /* TLS AAD length */ | |
41 | } EVP_ARIA_GCM_CTX; | |
42 | ||
43 | /* ARIA CCM context */ | |
44 | typedef struct { | |
45 | union { | |
39147079 | 46 | OSSL_UNION_ALIGN; |
bc326738 JS |
47 | ARIA_KEY ks; |
48 | } ks; /* ARIA key schedule to use */ | |
49 | int key_set; /* Set if key initialised */ | |
50 | int iv_set; /* Set if an iv is set */ | |
51 | int tag_set; /* Set if tag is valid */ | |
52 | int len_set; /* Set if message length set */ | |
53 | int L, M; /* L and M parameters from RFC3610 */ | |
54 | int tls_aad_len; /* TLS AAD length */ | |
55 | CCM128_CONTEXT ccm; | |
56 | ccm128_f str; | |
57 | } EVP_ARIA_CCM_CTX; | |
58 | ||
d42d0a4d P |
59 | /* The subkey for ARIA is generated. */ |
60 | static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
61 | const unsigned char *iv, int enc) | |
62 | { | |
63 | int ret; | |
64 | int mode = EVP_CIPHER_CTX_mode(ctx); | |
65 | ||
66 | if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE)) | |
67 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
68 | EVP_CIPHER_CTX_get_cipher_data(ctx)); | |
69 | else | |
70 | ret = aria_set_decrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
71 | EVP_CIPHER_CTX_get_cipher_data(ctx)); | |
72 | if (ret < 0) { | |
73 | EVPerr(EVP_F_ARIA_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
74 | return 0; | |
75 | } | |
76 | return 1; | |
77 | } | |
78 | ||
79 | static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out, | |
80 | size_t len, const ARIA_KEY *key, | |
81 | unsigned char *ivec, const int enc) | |
82 | { | |
83 | ||
84 | if (enc) | |
85 | CRYPTO_cbc128_encrypt(in, out, len, key, ivec, | |
86 | (block128_f) aria_encrypt); | |
87 | else | |
88 | CRYPTO_cbc128_decrypt(in, out, len, key, ivec, | |
89 | (block128_f) aria_encrypt); | |
90 | } | |
91 | ||
92 | static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out, | |
93 | size_t length, const ARIA_KEY *key, | |
94 | unsigned char *ivec, int *num, const int enc) | |
95 | { | |
96 | ||
97 | CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc, | |
98 | (block128_f) aria_encrypt); | |
99 | } | |
100 | ||
101 | static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out, | |
102 | size_t length, const ARIA_KEY *key, | |
103 | unsigned char *ivec, int *num, const int enc) | |
104 | { | |
105 | CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc, | |
106 | (block128_f) aria_encrypt); | |
107 | } | |
108 | ||
109 | static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out, | |
110 | size_t length, const ARIA_KEY *key, | |
111 | unsigned char *ivec, int *num, const int enc) | |
112 | { | |
113 | CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc, | |
114 | (block128_f) aria_encrypt); | |
115 | } | |
116 | ||
117 | static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out, | |
118 | const ARIA_KEY *key, const int enc) | |
119 | { | |
120 | aria_encrypt(in, out, key); | |
121 | } | |
122 | ||
123 | static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out, | |
124 | size_t length, const ARIA_KEY *key, | |
125 | unsigned char *ivec, int *num) | |
126 | { | |
127 | CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num, | |
128 | (block128_f) aria_encrypt); | |
129 | } | |
130 | ||
131 | IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY, | |
132 | NID_aria_128, 16, 16, 16, 128, | |
133 | 0, aria_init_key, NULL, | |
134 | EVP_CIPHER_set_asn1_iv, | |
135 | EVP_CIPHER_get_asn1_iv, | |
136 | NULL) | |
137 | IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY, | |
138 | NID_aria_192, 16, 24, 16, 128, | |
139 | 0, aria_init_key, NULL, | |
140 | EVP_CIPHER_set_asn1_iv, | |
141 | EVP_CIPHER_get_asn1_iv, | |
142 | NULL) | |
143 | IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY, | |
144 | NID_aria_256, 16, 32, 16, 128, | |
145 | 0, aria_init_key, NULL, | |
146 | EVP_CIPHER_set_asn1_iv, | |
147 | EVP_CIPHER_get_asn1_iv, | |
148 | NULL) | |
149 | ||
150 | # define IMPLEMENT_ARIA_CFBR(ksize,cbits) \ | |
151 | IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0) | |
152 | IMPLEMENT_ARIA_CFBR(128,1) | |
153 | IMPLEMENT_ARIA_CFBR(192,1) | |
154 | IMPLEMENT_ARIA_CFBR(256,1) | |
155 | IMPLEMENT_ARIA_CFBR(128,8) | |
156 | IMPLEMENT_ARIA_CFBR(192,8) | |
157 | IMPLEMENT_ARIA_CFBR(256,8) | |
158 | ||
159 | # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ | |
160 | static const EVP_CIPHER aria_##keylen##_##mode = { \ | |
161 | nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ | |
162 | flags|EVP_CIPH_##MODE##_MODE, \ | |
163 | aria_init_key, \ | |
164 | aria_##mode##_cipher, \ | |
165 | NULL, \ | |
166 | sizeof(EVP_ARIA_KEY), \ | |
167 | NULL,NULL,NULL,NULL }; \ | |
168 | const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ | |
169 | { return &aria_##keylen##_##mode; } | |
170 | ||
171 | static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
172 | const unsigned char *in, size_t len) | |
173 | { | |
174 | unsigned int num = EVP_CIPHER_CTX_num(ctx); | |
175 | EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY,ctx); | |
176 | ||
177 | CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, | |
178 | EVP_CIPHER_CTX_iv_noconst(ctx), | |
179 | EVP_CIPHER_CTX_buf_noconst(ctx), &num, | |
180 | (block128_f) aria_encrypt); | |
181 | EVP_CIPHER_CTX_set_num(ctx, num); | |
182 | return 1; | |
183 | } | |
184 | ||
185 | BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0) | |
186 | BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0) | |
187 | BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0) | |
188 | ||
bc326738 JS |
189 | /* Authenticated cipher modes (GCM/CCM) */ |
190 | ||
191 | /* increment counter (64-bit int) by 1 */ | |
192 | static void ctr64_inc(unsigned char *counter) | |
193 | { | |
194 | int n = 8; | |
195 | unsigned char c; | |
196 | ||
197 | do { | |
198 | --n; | |
199 | c = counter[n]; | |
200 | ++c; | |
201 | counter[n] = c; | |
202 | if (c) | |
203 | return; | |
204 | } while (n); | |
205 | } | |
206 | ||
207 | static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
208 | const unsigned char *iv, int enc) | |
209 | { | |
210 | int ret; | |
211 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
212 | ||
213 | if (!iv && !key) | |
214 | return 1; | |
215 | if (key) { | |
216 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
217 | &gctx->ks.ks); | |
218 | CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, | |
219 | (block128_f) aria_encrypt); | |
220 | if (ret < 0) { | |
221 | EVPerr(EVP_F_ARIA_GCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
222 | return 0; | |
223 | } | |
224 | ||
225 | /* | |
226 | * If we have an iv can set it directly, otherwise use saved IV. | |
227 | */ | |
228 | if (iv == NULL && gctx->iv_set) | |
229 | iv = gctx->iv; | |
230 | if (iv) { | |
231 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); | |
232 | gctx->iv_set = 1; | |
233 | } | |
234 | gctx->key_set = 1; | |
235 | } else { | |
236 | /* If key set use IV, otherwise copy */ | |
237 | if (gctx->key_set) | |
238 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); | |
239 | else | |
240 | memcpy(gctx->iv, iv, gctx->ivlen); | |
241 | gctx->iv_set = 1; | |
242 | gctx->iv_gen = 0; | |
243 | } | |
244 | return 1; | |
245 | } | |
246 | ||
247 | static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
248 | { | |
249 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,c); | |
250 | ||
251 | switch (type) { | |
252 | case EVP_CTRL_INIT: | |
253 | gctx->key_set = 0; | |
254 | gctx->iv_set = 0; | |
7dddf2fc | 255 | gctx->ivlen = EVP_CIPHER_iv_length(c->cipher); |
bc326738 JS |
256 | gctx->iv = EVP_CIPHER_CTX_iv_noconst(c); |
257 | gctx->taglen = -1; | |
258 | gctx->iv_gen = 0; | |
259 | gctx->tls_aad_len = -1; | |
260 | return 1; | |
261 | ||
7dddf2fc SL |
262 | case EVP_CTRL_GET_IVLEN: |
263 | *(int *)ptr = gctx->ivlen; | |
264 | return 1; | |
265 | ||
bc326738 JS |
266 | case EVP_CTRL_AEAD_SET_IVLEN: |
267 | if (arg <= 0) | |
268 | return 0; | |
269 | /* Allocate memory for IV if needed */ | |
270 | if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { | |
271 | if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(c)) | |
272 | OPENSSL_free(gctx->iv); | |
cdb10bae RS |
273 | if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) { |
274 | EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE); | |
bc326738 | 275 | return 0; |
cdb10bae | 276 | } |
bc326738 JS |
277 | } |
278 | gctx->ivlen = arg; | |
279 | return 1; | |
280 | ||
281 | case EVP_CTRL_AEAD_SET_TAG: | |
282 | if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c)) | |
283 | return 0; | |
284 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
285 | gctx->taglen = arg; | |
286 | return 1; | |
287 | ||
288 | case EVP_CTRL_AEAD_GET_TAG: | |
289 | if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c) | |
290 | || gctx->taglen < 0) | |
291 | return 0; | |
292 | memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg); | |
293 | return 1; | |
294 | ||
295 | case EVP_CTRL_GCM_SET_IV_FIXED: | |
296 | /* Special case: -1 length restores whole IV */ | |
297 | if (arg == -1) { | |
298 | memcpy(gctx->iv, ptr, gctx->ivlen); | |
299 | gctx->iv_gen = 1; | |
300 | return 1; | |
301 | } | |
302 | /* | |
303 | * Fixed field must be at least 4 bytes and invocation field at least | |
304 | * 8. | |
305 | */ | |
306 | if ((arg < 4) || (gctx->ivlen - arg) < 8) | |
307 | return 0; | |
308 | if (arg) | |
309 | memcpy(gctx->iv, ptr, arg); | |
16cfc2c9 KR |
310 | if (EVP_CIPHER_CTX_encrypting(c) |
311 | && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) | |
312 | return 0; | |
bc326738 JS |
313 | gctx->iv_gen = 1; |
314 | return 1; | |
315 | ||
316 | case EVP_CTRL_GCM_IV_GEN: | |
317 | if (gctx->iv_gen == 0 || gctx->key_set == 0) | |
318 | return 0; | |
319 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); | |
320 | if (arg <= 0 || arg > gctx->ivlen) | |
321 | arg = gctx->ivlen; | |
322 | memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); | |
323 | /* | |
324 | * Invocation field will be at least 8 bytes in size and so no need | |
325 | * to check wrap around or increment more than last 8 bytes. | |
326 | */ | |
327 | ctr64_inc(gctx->iv + gctx->ivlen - 8); | |
328 | gctx->iv_set = 1; | |
329 | return 1; | |
330 | ||
331 | case EVP_CTRL_GCM_SET_IV_INV: | |
332 | if (gctx->iv_gen == 0 || gctx->key_set == 0 | |
333 | || EVP_CIPHER_CTX_encrypting(c)) | |
334 | return 0; | |
335 | memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); | |
336 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); | |
337 | gctx->iv_set = 1; | |
338 | return 1; | |
339 | ||
340 | case EVP_CTRL_AEAD_TLS1_AAD: | |
341 | /* Save the AAD for later use */ | |
342 | if (arg != EVP_AEAD_TLS1_AAD_LEN) | |
343 | return 0; | |
344 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
345 | gctx->tls_aad_len = arg; | |
346 | { | |
347 | unsigned int len = | |
348 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 | |
349 | | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; | |
350 | /* Correct length for explicit IV */ | |
351 | if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN) | |
352 | return 0; | |
353 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
354 | /* If decrypting correct for tag too */ | |
355 | if (!EVP_CIPHER_CTX_encrypting(c)) { | |
356 | if (len < EVP_GCM_TLS_TAG_LEN) | |
357 | return 0; | |
358 | len -= EVP_GCM_TLS_TAG_LEN; | |
359 | } | |
360 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; | |
361 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; | |
362 | } | |
363 | /* Extra padding: tag appended to record */ | |
364 | return EVP_GCM_TLS_TAG_LEN; | |
365 | ||
366 | case EVP_CTRL_COPY: | |
367 | { | |
368 | EVP_CIPHER_CTX *out = ptr; | |
369 | EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX,out); | |
370 | if (gctx->gcm.key) { | |
371 | if (gctx->gcm.key != &gctx->ks) | |
372 | return 0; | |
373 | gctx_out->gcm.key = &gctx_out->ks; | |
374 | } | |
375 | if (gctx->iv == EVP_CIPHER_CTX_iv_noconst(c)) | |
376 | gctx_out->iv = EVP_CIPHER_CTX_iv_noconst(out); | |
377 | else { | |
cdb10bae RS |
378 | if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) { |
379 | EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE); | |
bc326738 | 380 | return 0; |
cdb10bae | 381 | } |
bc326738 JS |
382 | memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); |
383 | } | |
384 | return 1; | |
385 | } | |
386 | ||
387 | default: | |
388 | return -1; | |
389 | ||
390 | } | |
391 | } | |
392 | ||
393 | static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
394 | const unsigned char *in, size_t len) | |
395 | { | |
396 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
397 | int rv = -1; | |
398 | ||
399 | /* Encrypt/decrypt must be performed in place */ | |
400 | if (out != in | |
401 | || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) | |
402 | return -1; | |
403 | /* | |
404 | * Set IV from start of buffer or generate IV and write to start of | |
405 | * buffer. | |
406 | */ | |
407 | if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ? | |
408 | EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, | |
409 | EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) | |
410 | goto err; | |
411 | /* Use saved AAD */ | |
412 | if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), | |
413 | gctx->tls_aad_len)) | |
414 | goto err; | |
415 | /* Fix buffer and length to point to payload */ | |
416 | in += EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
417 | out += EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
418 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; | |
419 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
420 | /* Encrypt payload */ | |
421 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) | |
422 | goto err; | |
423 | out += len; | |
424 | /* Finally write tag */ | |
425 | CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); | |
426 | rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; | |
427 | } else { | |
428 | /* Decrypt */ | |
429 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) | |
430 | goto err; | |
431 | /* Retrieve tag */ | |
432 | CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), | |
433 | EVP_GCM_TLS_TAG_LEN); | |
434 | /* If tag mismatch wipe buffer */ | |
435 | if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len, | |
436 | EVP_GCM_TLS_TAG_LEN)) { | |
437 | OPENSSL_cleanse(out, len); | |
438 | goto err; | |
439 | } | |
440 | rv = len; | |
441 | } | |
442 | ||
443 | err: | |
444 | gctx->iv_set = 0; | |
445 | gctx->tls_aad_len = -1; | |
446 | return rv; | |
447 | } | |
448 | ||
449 | static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
450 | const unsigned char *in, size_t len) | |
451 | { | |
452 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx); | |
453 | ||
454 | /* If not set up, return error */ | |
455 | if (!gctx->key_set) | |
456 | return -1; | |
457 | ||
458 | if (gctx->tls_aad_len >= 0) | |
459 | return aria_gcm_tls_cipher(ctx, out, in, len); | |
460 | ||
461 | if (!gctx->iv_set) | |
462 | return -1; | |
463 | if (in) { | |
464 | if (out == NULL) { | |
465 | if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) | |
466 | return -1; | |
467 | } else if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
468 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) | |
469 | return -1; | |
470 | } else { | |
471 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) | |
472 | return -1; | |
473 | } | |
474 | return len; | |
475 | } | |
476 | if (!EVP_CIPHER_CTX_encrypting(ctx)) { | |
477 | if (gctx->taglen < 0) | |
478 | return -1; | |
479 | if (CRYPTO_gcm128_finish(&gctx->gcm, | |
480 | EVP_CIPHER_CTX_buf_noconst(ctx), | |
481 | gctx->taglen) != 0) | |
482 | return -1; | |
483 | gctx->iv_set = 0; | |
484 | return 0; | |
485 | } | |
486 | CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16); | |
487 | gctx->taglen = 16; | |
488 | /* Don't reuse the IV */ | |
489 | gctx->iv_set = 0; | |
490 | return 0; | |
491 | } | |
492 | ||
183f52e2 MC |
493 | static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx) |
494 | { | |
495 | EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx); | |
496 | ||
497 | if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(ctx)) | |
498 | OPENSSL_free(gctx->iv); | |
499 | ||
500 | return 1; | |
501 | } | |
502 | ||
bc326738 JS |
503 | static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
504 | const unsigned char *iv, int enc) | |
505 | { | |
506 | int ret; | |
507 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
508 | ||
509 | if (!iv && !key) | |
510 | return 1; | |
511 | ||
512 | if (key) { | |
513 | ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, | |
514 | &cctx->ks.ks); | |
515 | CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, | |
516 | &cctx->ks, (block128_f) aria_encrypt); | |
517 | if (ret < 0) { | |
518 | EVPerr(EVP_F_ARIA_CCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED); | |
519 | return 0; | |
520 | } | |
521 | cctx->str = NULL; | |
522 | cctx->key_set = 1; | |
523 | } | |
524 | if (iv) { | |
525 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L); | |
526 | cctx->iv_set = 1; | |
527 | } | |
528 | return 1; | |
529 | } | |
530 | ||
531 | static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
532 | { | |
533 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,c); | |
534 | ||
535 | switch (type) { | |
536 | case EVP_CTRL_INIT: | |
537 | cctx->key_set = 0; | |
538 | cctx->iv_set = 0; | |
539 | cctx->L = 8; | |
540 | cctx->M = 12; | |
541 | cctx->tag_set = 0; | |
542 | cctx->len_set = 0; | |
543 | cctx->tls_aad_len = -1; | |
544 | return 1; | |
545 | ||
7dddf2fc SL |
546 | case EVP_CTRL_GET_IVLEN: |
547 | *(int *)ptr = 15 - cctx->L; | |
548 | return 1; | |
549 | ||
bc326738 JS |
550 | case EVP_CTRL_AEAD_TLS1_AAD: |
551 | /* Save the AAD for later use */ | |
552 | if (arg != EVP_AEAD_TLS1_AAD_LEN) | |
553 | return 0; | |
554 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
555 | cctx->tls_aad_len = arg; | |
556 | { | |
557 | uint16_t len = | |
558 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8 | |
559 | | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1]; | |
560 | /* Correct length for explicit IV */ | |
561 | if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN) | |
562 | return 0; | |
563 | len -= EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
564 | /* If decrypting correct for tag too */ | |
565 | if (!EVP_CIPHER_CTX_encrypting(c)) { | |
566 | if (len < cctx->M) | |
567 | return 0; | |
568 | len -= cctx->M; | |
569 | } | |
570 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8; | |
571 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff; | |
572 | } | |
573 | /* Extra padding: tag appended to record */ | |
574 | return cctx->M; | |
575 | ||
576 | case EVP_CTRL_CCM_SET_IV_FIXED: | |
577 | /* Sanity check length */ | |
578 | if (arg != EVP_CCM_TLS_FIXED_IV_LEN) | |
579 | return 0; | |
580 | /* Just copy to first part of IV */ | |
581 | memcpy(EVP_CIPHER_CTX_iv_noconst(c), ptr, arg); | |
582 | return 1; | |
583 | ||
584 | case EVP_CTRL_AEAD_SET_IVLEN: | |
585 | arg = 15 - arg; | |
586 | /* fall thru */ | |
587 | case EVP_CTRL_CCM_SET_L: | |
588 | if (arg < 2 || arg > 8) | |
589 | return 0; | |
590 | cctx->L = arg; | |
591 | return 1; | |
592 | case EVP_CTRL_AEAD_SET_TAG: | |
593 | if ((arg & 1) || arg < 4 || arg > 16) | |
594 | return 0; | |
595 | if (EVP_CIPHER_CTX_encrypting(c) && ptr) | |
596 | return 0; | |
597 | if (ptr) { | |
598 | cctx->tag_set = 1; | |
599 | memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg); | |
600 | } | |
601 | cctx->M = arg; | |
602 | return 1; | |
603 | ||
604 | case EVP_CTRL_AEAD_GET_TAG: | |
605 | if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set) | |
606 | return 0; | |
607 | if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) | |
608 | return 0; | |
609 | cctx->tag_set = 0; | |
610 | cctx->iv_set = 0; | |
611 | cctx->len_set = 0; | |
612 | return 1; | |
613 | ||
614 | case EVP_CTRL_COPY: | |
615 | { | |
616 | EVP_CIPHER_CTX *out = ptr; | |
617 | EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX,out); | |
618 | if (cctx->ccm.key) { | |
619 | if (cctx->ccm.key != &cctx->ks) | |
620 | return 0; | |
621 | cctx_out->ccm.key = &cctx_out->ks; | |
622 | } | |
623 | return 1; | |
624 | } | |
625 | ||
626 | default: | |
627 | return -1; | |
628 | } | |
629 | } | |
630 | ||
631 | static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
632 | const unsigned char *in, size_t len) | |
633 | { | |
634 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
635 | CCM128_CONTEXT *ccm = &cctx->ccm; | |
636 | ||
637 | /* Encrypt/decrypt must be performed in place */ | |
638 | if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M)) | |
639 | return -1; | |
640 | /* If encrypting set explicit IV from sequence number (start of AAD) */ | |
641 | if (EVP_CIPHER_CTX_encrypting(ctx)) | |
642 | memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx), | |
643 | EVP_CCM_TLS_EXPLICIT_IV_LEN); | |
644 | /* Get rest of IV from explicit IV */ | |
645 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx) + EVP_CCM_TLS_FIXED_IV_LEN, in, | |
646 | EVP_CCM_TLS_EXPLICIT_IV_LEN); | |
647 | /* Correct length value */ | |
648 | len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; | |
649 | if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), 15 - cctx->L, | |
650 | len)) | |
651 | return -1; | |
652 | /* Use saved AAD */ | |
653 | CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len); | |
654 | /* Fix buffer to point to payload */ | |
655 | in += EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
656 | out += EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
657 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
658 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) | |
659 | : CRYPTO_ccm128_encrypt(ccm, in, out, len)) | |
660 | return -1; | |
661 | if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M)) | |
662 | return -1; | |
663 | return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M; | |
664 | } else { | |
665 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str) | |
666 | : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { | |
667 | unsigned char tag[16]; | |
668 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { | |
669 | if (!CRYPTO_memcmp(tag, in + len, cctx->M)) | |
670 | return len; | |
671 | } | |
672 | } | |
673 | OPENSSL_cleanse(out, len); | |
674 | return -1; | |
675 | } | |
676 | } | |
677 | ||
678 | static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
679 | const unsigned char *in, size_t len) | |
680 | { | |
681 | EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx); | |
682 | CCM128_CONTEXT *ccm = &cctx->ccm; | |
683 | ||
684 | /* If not set up, return error */ | |
685 | if (!cctx->key_set) | |
686 | return -1; | |
687 | ||
688 | if (cctx->tls_aad_len >= 0) | |
689 | return aria_ccm_tls_cipher(ctx, out, in, len); | |
690 | ||
691 | /* EVP_*Final() doesn't return any data */ | |
692 | if (in == NULL && out != NULL) | |
693 | return 0; | |
694 | ||
695 | if (!cctx->iv_set) | |
696 | return -1; | |
697 | ||
698 | if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set) | |
699 | return -1; | |
700 | if (!out) { | |
701 | if (!in) { | |
702 | if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), | |
703 | 15 - cctx->L, len)) | |
704 | return -1; | |
705 | cctx->len_set = 1; | |
706 | return len; | |
707 | } | |
708 | /* If have AAD need message length */ | |
709 | if (!cctx->len_set && len) | |
710 | return -1; | |
711 | CRYPTO_ccm128_aad(ccm, in, len); | |
712 | return len; | |
713 | } | |
714 | /* If not set length yet do it */ | |
715 | if (!cctx->len_set) { | |
716 | if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), | |
717 | 15 - cctx->L, len)) | |
718 | return -1; | |
719 | cctx->len_set = 1; | |
720 | } | |
721 | if (EVP_CIPHER_CTX_encrypting(ctx)) { | |
722 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str) | |
723 | : CRYPTO_ccm128_encrypt(ccm, in, out, len)) | |
724 | return -1; | |
725 | cctx->tag_set = 1; | |
726 | return len; | |
727 | } else { | |
728 | int rv = -1; | |
729 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, | |
730 | cctx->str) : | |
731 | !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { | |
732 | unsigned char tag[16]; | |
733 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { | |
734 | if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx), | |
735 | cctx->M)) | |
736 | rv = len; | |
737 | } | |
738 | } | |
739 | if (rv == -1) | |
740 | OPENSSL_cleanse(out, len); | |
741 | cctx->iv_set = 0; | |
742 | cctx->tag_set = 0; | |
743 | cctx->len_set = 0; | |
744 | return rv; | |
745 | } | |
746 | } | |
747 | ||
183f52e2 MC |
748 | #define aria_ccm_cleanup NULL |
749 | ||
bc326738 JS |
750 | #define ARIA_AUTH_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ |
751 | | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ | |
752 | | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ | |
7dddf2fc SL |
753 | | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \ |
754 | | EVP_CIPH_CUSTOM_IV_LENGTH) | |
bc326738 JS |
755 | |
756 | #define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ | |
757 | static const EVP_CIPHER aria_##keylen##_##mode = { \ | |
758 | nid##_##keylen##_##nmode, \ | |
759 | blocksize, keylen/8, ivlen, \ | |
760 | ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE, \ | |
761 | aria_##mode##_init_key, \ | |
762 | aria_##mode##_cipher, \ | |
183f52e2 | 763 | aria_##mode##_cleanup, \ |
bc326738 JS |
764 | sizeof(EVP_ARIA_##MODE##_CTX), \ |
765 | NULL,NULL,aria_##mode##_ctrl,NULL }; \ | |
766 | const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \ | |
767 | { return (EVP_CIPHER*)&aria_##keylen##_##mode; } | |
768 | ||
769 | BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0) | |
770 | BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0) | |
771 | BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0) | |
772 | ||
773 | BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0) | |
774 | BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0) | |
775 | BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0) | |
776 | ||
d42d0a4d | 777 | #endif |