crypto/evp/e_aria.c

   1 /*
   2  * Copyright 2017-2018 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/cryptlib.h"
  12 #ifndef OPENSSL_NO_ARIA
  13 # include <openssl/evp.h>
  14 # include <openssl/modes.h>
  15 # include <openssl/rand.h>
  16 # include <openssl/rand_drbg.h>
  17 # include "internal/aria.h"
  18 # include "internal/evp_int.h"
  19 # include "modes_lcl.h"
  20 # include "evp_locl.h"
  21
  22 /* ARIA subkey Structure */
  23 typedef struct {
  24     ARIA_KEY ks;
  25 } EVP_ARIA_KEY;
  26
  27 /* ARIA GCM context */
  28 typedef struct {
  29     union {
  30         double align;
  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 {
  46         double align;
  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
  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
 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;
 255         gctx->ivlen = EVP_CIPHER_CTX_iv_length(c);
 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
 262     case EVP_CTRL_AEAD_SET_IVLEN:
 263         if (arg <= 0)
 264             return 0;
 265         /* Allocate memory for IV if needed */
 266         if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
 267             if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(c))
 268                 OPENSSL_free(gctx->iv);
 269             if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) {
 270                 EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE);
 271                 return 0;
 272             }
 273         }
 274         gctx->ivlen = arg;
 275         return 1;
 276
 277     case EVP_CTRL_AEAD_SET_TAG:
 278         if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c))
 279             return 0;
 280         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 281         gctx->taglen = arg;
 282         return 1;
 283
 284     case EVP_CTRL_AEAD_GET_TAG:
 285         if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c)
 286             || gctx->taglen < 0)
 287             return 0;
 288         memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg);
 289         return 1;
 290
 291     case EVP_CTRL_GCM_SET_IV_FIXED:
 292         /* Special case: -1 length restores whole IV */
 293         if (arg == -1) {
 294             memcpy(gctx->iv, ptr, gctx->ivlen);
 295             gctx->iv_gen = 1;
 296             return 1;
 297         }
 298         /*
 299          * Fixed field must be at least 4 bytes and invocation field at least
 300          * 8.
 301          */
 302         if ((arg < 4) || (gctx->ivlen - arg) < 8)
 303             return 0;
 304         if (arg)
 305             memcpy(gctx->iv, ptr, arg);
 306         if (EVP_CIPHER_CTX_encrypting(c)
 307             && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 308             return 0;
 309         gctx->iv_gen = 1;
 310         return 1;
 311
 312     case EVP_CTRL_GCM_IV_GEN:
 313         if (gctx->iv_gen == 0 || gctx->key_set == 0)
 314             return 0;
 315         CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 316         if (arg <= 0 || arg > gctx->ivlen)
 317             arg = gctx->ivlen;
 318         memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 319         /*
 320          * Invocation field will be at least 8 bytes in size and so no need
 321          * to check wrap around or increment more than last 8 bytes.
 322          */
 323         ctr64_inc(gctx->iv + gctx->ivlen - 8);
 324         gctx->iv_set = 1;
 325         return 1;
 326
 327     case EVP_CTRL_GCM_SET_IV_INV:
 328         if (gctx->iv_gen == 0 || gctx->key_set == 0
 329             || EVP_CIPHER_CTX_encrypting(c))
 330             return 0;
 331         memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 332         CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 333         gctx->iv_set = 1;
 334         return 1;
 335
 336     case EVP_CTRL_AEAD_TLS1_AAD:
 337         /* Save the AAD for later use */
 338         if (arg != EVP_AEAD_TLS1_AAD_LEN)
 339             return 0;
 340         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 341         gctx->tls_aad_len = arg;
 342         {
 343             unsigned int len =
 344                 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
 345                 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
 346             /* Correct length for explicit IV */
 347             if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
 348                 return 0;
 349             len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 350             /* If decrypting correct for tag too */
 351             if (!EVP_CIPHER_CTX_encrypting(c)) {
 352                 if (len < EVP_GCM_TLS_TAG_LEN)
 353                     return 0;
 354                 len -= EVP_GCM_TLS_TAG_LEN;
 355             }
 356             EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
 357             EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
 358         }
 359         /* Extra padding: tag appended to record */
 360         return EVP_GCM_TLS_TAG_LEN;
 361
 362     case EVP_CTRL_COPY:
 363         {
 364             EVP_CIPHER_CTX *out = ptr;
 365             EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX,out);
 366             if (gctx->gcm.key) {
 367                 if (gctx->gcm.key != &gctx->ks)
 368                     return 0;
 369                 gctx_out->gcm.key = &gctx_out->ks;
 370             }
 371             if (gctx->iv == EVP_CIPHER_CTX_iv_noconst(c))
 372                 gctx_out->iv = EVP_CIPHER_CTX_iv_noconst(out);
 373             else {
 374                 if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) {
 375                     EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE);
 376                     return 0;
 377                 }
 378                 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
 379             }
 380             return 1;
 381         }
 382
 383     default:
 384         return -1;
 385
 386     }
 387 }
 388
 389 static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 390                               const unsigned char *in, size_t len)
 391 {
 392     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);
 393     int rv = -1;
 394
 395     /* Encrypt/decrypt must be performed in place */
 396     if (out != in
 397         || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
 398         return -1;
 399     /*
 400      * Set IV from start of buffer or generate IV and write to start of
 401      * buffer.
 402      */
 403     if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ?
 404                             EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 405                             EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 406         goto err;
 407     /* Use saved AAD */
 408     if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
 409                           gctx->tls_aad_len))
 410         goto err;
 411     /* Fix buffer and length to point to payload */
 412     in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 413     out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 414     len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 415     if (EVP_CIPHER_CTX_encrypting(ctx)) {
 416         /* Encrypt payload */
 417         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 418             goto err;
 419         out += len;
 420         /* Finally write tag */
 421         CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 422         rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 423     } else {
 424         /* Decrypt */
 425         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 426             goto err;
 427         /* Retrieve tag */
 428         CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
 429                           EVP_GCM_TLS_TAG_LEN);
 430         /* If tag mismatch wipe buffer */
 431         if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len,
 432                           EVP_GCM_TLS_TAG_LEN)) {
 433             OPENSSL_cleanse(out, len);
 434             goto err;
 435         }
 436         rv = len;
 437     }
 438
 439  err:
 440     gctx->iv_set = 0;
 441     gctx->tls_aad_len = -1;
 442     return rv;
 443 }
 444
 445 static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 446                           const unsigned char *in, size_t len)
 447 {
 448     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);
 449
 450     /* If not set up, return error */
 451     if (!gctx->key_set)
 452         return -1;
 453
 454     if (gctx->tls_aad_len >= 0)
 455         return aria_gcm_tls_cipher(ctx, out, in, len);
 456
 457     if (!gctx->iv_set)
 458         return -1;
 459     if (in) {
 460         if (out == NULL) {
 461             if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 462                 return -1;
 463         } else if (EVP_CIPHER_CTX_encrypting(ctx)) {
 464             if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 465                 return -1;
 466         } else {
 467             if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 468                 return -1;
 469         }
 470         return len;
 471     }
 472     if (!EVP_CIPHER_CTX_encrypting(ctx)) {
 473         if (gctx->taglen < 0)
 474             return -1;
 475         if (CRYPTO_gcm128_finish(&gctx->gcm,
 476                                  EVP_CIPHER_CTX_buf_noconst(ctx),
 477                                  gctx->taglen) != 0)
 478             return -1;
 479         gctx->iv_set = 0;
 480         return 0;
 481     }
 482     CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);
 483     gctx->taglen = 16;
 484     /* Don't reuse the IV */
 485     gctx->iv_set = 0;
 486     return 0;
 487 }
 488
 489 static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 490                             const unsigned char *iv, int enc)
 491 {
 492     int ret;
 493     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);
 494
 495     if (!iv && !key)
 496         return 1;
 497
 498     if (key) {
 499         ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,
 500                                    &cctx->ks.ks);
 501         CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 502                            &cctx->ks, (block128_f) aria_encrypt);
 503         if (ret < 0) {
 504             EVPerr(EVP_F_ARIA_CCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED);
 505             return 0;
 506         }
 507         cctx->str = NULL;
 508         cctx->key_set = 1;
 509     }
 510     if (iv) {
 511         memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L);
 512         cctx->iv_set = 1;
 513     }
 514     return 1;
 515 }
 516
 517 static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 518 {
 519     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,c);
 520
 521     switch (type) {
 522     case EVP_CTRL_INIT:
 523         cctx->key_set = 0;
 524         cctx->iv_set = 0;
 525         cctx->L = 8;
 526         cctx->M = 12;
 527         cctx->tag_set = 0;
 528         cctx->len_set = 0;
 529         cctx->tls_aad_len = -1;
 530         return 1;
 531
 532     case EVP_CTRL_AEAD_TLS1_AAD:
 533         /* Save the AAD for later use */
 534         if (arg != EVP_AEAD_TLS1_AAD_LEN)
 535             return 0;
 536         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 537         cctx->tls_aad_len = arg;
 538         {
 539             uint16_t len =
 540                 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
 541                 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
 542             /* Correct length for explicit IV */
 543             if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN)
 544                 return 0;
 545             len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
 546             /* If decrypting correct for tag too */
 547             if (!EVP_CIPHER_CTX_encrypting(c)) {
 548                 if (len < cctx->M)
 549                     return 0;
 550                 len -= cctx->M;
 551             }
 552             EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
 553             EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
 554         }
 555         /* Extra padding: tag appended to record */
 556         return cctx->M;
 557
 558     case EVP_CTRL_CCM_SET_IV_FIXED:
 559         /* Sanity check length */
 560         if (arg != EVP_CCM_TLS_FIXED_IV_LEN)
 561             return 0;
 562         /* Just copy to first part of IV */
 563         memcpy(EVP_CIPHER_CTX_iv_noconst(c), ptr, arg);
 564         return 1;
 565
 566     case EVP_CTRL_AEAD_SET_IVLEN:
 567         arg = 15 - arg;
 568         /* fall thru */
 569     case EVP_CTRL_CCM_SET_L:
 570         if (arg < 2 || arg > 8)
 571             return 0;
 572         cctx->L = arg;
 573         return 1;
 574     case EVP_CTRL_AEAD_SET_TAG:
 575         if ((arg & 1) || arg < 4 || arg > 16)
 576             return 0;
 577         if (EVP_CIPHER_CTX_encrypting(c) && ptr)
 578             return 0;
 579         if (ptr) {
 580             cctx->tag_set = 1;
 581             memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 582         }
 583         cctx->M = arg;
 584         return 1;
 585
 586     case EVP_CTRL_AEAD_GET_TAG:
 587         if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set)
 588             return 0;
 589         if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
 590             return 0;
 591         cctx->tag_set = 0;
 592         cctx->iv_set = 0;
 593         cctx->len_set = 0;
 594         return 1;
 595
 596     case EVP_CTRL_COPY:
 597         {
 598             EVP_CIPHER_CTX *out = ptr;
 599             EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX,out);
 600             if (cctx->ccm.key) {
 601                 if (cctx->ccm.key != &cctx->ks)
 602                     return 0;
 603                 cctx_out->ccm.key = &cctx_out->ks;
 604             }
 605             return 1;
 606         }
 607
 608     default:
 609         return -1;
 610     }
 611 }
 612
 613 static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 614                               const unsigned char *in, size_t len)
 615 {
 616     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);
 617     CCM128_CONTEXT *ccm = &cctx->ccm;
 618
 619     /* Encrypt/decrypt must be performed in place */
 620     if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))
 621         return -1;
 622     /* If encrypting set explicit IV from sequence number (start of AAD) */
 623     if (EVP_CIPHER_CTX_encrypting(ctx))
 624         memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),
 625                EVP_CCM_TLS_EXPLICIT_IV_LEN);
 626     /* Get rest of IV from explicit IV */
 627     memcpy(EVP_CIPHER_CTX_iv_noconst(ctx) + EVP_CCM_TLS_FIXED_IV_LEN, in,
 628            EVP_CCM_TLS_EXPLICIT_IV_LEN);
 629     /* Correct length value */
 630     len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
 631     if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), 15 - cctx->L,
 632                             len))
 633             return -1;
 634     /* Use saved AAD */
 635     CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len);
 636     /* Fix buffer to point to payload */
 637     in += EVP_CCM_TLS_EXPLICIT_IV_LEN;
 638     out += EVP_CCM_TLS_EXPLICIT_IV_LEN;
 639     if (EVP_CIPHER_CTX_encrypting(ctx)) {
 640         if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
 641                       : CRYPTO_ccm128_encrypt(ccm, in, out, len))
 642             return -1;
 643         if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))
 644             return -1;
 645         return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
 646     } else {
 647         if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str)
 648                       : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
 649             unsigned char tag[16];
 650             if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
 651                 if (!CRYPTO_memcmp(tag, in + len, cctx->M))
 652                     return len;
 653             }
 654         }
 655         OPENSSL_cleanse(out, len);
 656         return -1;
 657     }
 658 }
 659
 660 static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 661                           const unsigned char *in, size_t len)
 662 {
 663     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);
 664     CCM128_CONTEXT *ccm = &cctx->ccm;
 665
 666     /* If not set up, return error */
 667     if (!cctx->key_set)
 668         return -1;
 669
 670     if (cctx->tls_aad_len >= 0)
 671         return aria_ccm_tls_cipher(ctx, out, in, len);
 672
 673     /* EVP_*Final() doesn't return any data */
 674     if (in == NULL && out != NULL)
 675         return 0;
 676
 677     if (!cctx->iv_set)
 678         return -1;
 679
 680     if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set)
 681         return -1;
 682     if (!out) {
 683         if (!in) {
 684             if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx),
 685                                     15 - cctx->L, len))
 686                 return -1;
 687             cctx->len_set = 1;
 688             return len;
 689         }
 690         /* If have AAD need message length */
 691         if (!cctx->len_set && len)
 692             return -1;
 693         CRYPTO_ccm128_aad(ccm, in, len);
 694         return len;
 695     }
 696     /* If not set length yet do it */
 697     if (!cctx->len_set) {
 698         if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx),
 699                                 15 - cctx->L, len))
 700             return -1;
 701         cctx->len_set = 1;
 702     }
 703     if (EVP_CIPHER_CTX_encrypting(ctx)) {
 704         if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
 705                       : CRYPTO_ccm128_encrypt(ccm, in, out, len))
 706             return -1;
 707         cctx->tag_set = 1;
 708         return len;
 709     } else {
 710         int rv = -1;
 711         if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
 712                                                      cctx->str) :
 713             !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
 714             unsigned char tag[16];
 715             if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
 716                 if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),
 717                                    cctx->M))
 718                     rv = len;
 719             }
 720         }
 721         if (rv == -1)
 722             OPENSSL_cleanse(out, len);
 723         cctx->iv_set = 0;
 724         cctx->tag_set = 0;
 725         cctx->len_set = 0;
 726         return rv;
 727     }
 728 }
 729
 730 #define ARIA_AUTH_FLAGS  (EVP_CIPH_FLAG_DEFAULT_ASN1 \
 731                           | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
 732                           | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
 733                           | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER)
 734
 735 #define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 736 static const EVP_CIPHER aria_##keylen##_##mode = { \
 737         nid##_##keylen##_##nmode,                  \
 738         blocksize, keylen/8, ivlen,                \
 739         ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE,    \
 740         aria_##mode##_init_key,                    \
 741         aria_##mode##_cipher,                      \
 742         NULL,                                      \
 743         sizeof(EVP_ARIA_##MODE##_CTX),             \
 744         NULL,NULL,aria_##mode##_ctrl,NULL };       \
 745 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
 746 { return (EVP_CIPHER*)&aria_##keylen##_##mode; }
 747
 748 BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0)
 749 BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0)
 750 BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0)
 751
 752 BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0)
 753 BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0)
 754 BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0)
 755
 756 #endif