crypto/evp/e_aria.c

   1 /*
   2  * Copyright 2017-2019 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 "internal/modes_int.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         OSSL_UNION_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         OSSL_UNION_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_iv_length(c->cipher);
 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_GET_IVLEN:
 263         *(int *)ptr = gctx->ivlen;
 264         return 1;
 265
 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);
 273             if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) {
 274                 EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE);
 275                 return 0;
 276             }
 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);
 310         if (EVP_CIPHER_CTX_encrypting(c)
 311             && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 312             return 0;
 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 {
 378                 if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) {
 379                     EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE);
 380                     return 0;
 381                 }
 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
 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
 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
 546     case EVP_CTRL_GET_IVLEN:
 547         *(int *)ptr = 15 - cctx->L;
 548         return 1;
 549
 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
 748 #define aria_ccm_cleanup    NULL
 749
 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 \
 753                           | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \
 754                           | EVP_CIPH_CUSTOM_IV_LENGTH)
 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,                      \
 763         aria_##mode##_cleanup,                     \
 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
 777 #endif