crypto/evp/e_aria.c

   1 /*
   2  * Copyright 2017-2021 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/deprecated.h"
  12
  13 #include "internal/cryptlib.h"
  14 #ifndef OPENSSL_NO_ARIA
  15 # include <openssl/evp.h>
  16 # include <openssl/modes.h>
  17 # include <openssl/rand.h>
  18 # include "crypto/aria.h"
  19 # include "crypto/evp.h"
  20 # include "crypto/modes.h"
  21 # include "evp_local.h"
  22
  23 /* ARIA subkey Structure */
  24 typedef struct {
  25     ARIA_KEY ks;
  26 } EVP_ARIA_KEY;
  27
  28 /* ARIA GCM context */
  29 typedef struct {
  30     union {
  31         OSSL_UNION_ALIGN;
  32         ARIA_KEY ks;
  33     } ks;                       /* ARIA subkey to use */
  34     int key_set;                /* Set if key initialised */
  35     int iv_set;                 /* Set if an iv is set */
  36     GCM128_CONTEXT gcm;
  37     unsigned char *iv;          /* Temporary IV store */
  38     int ivlen;                  /* IV length */
  39     int taglen;
  40     int iv_gen;                 /* It is OK to generate IVs */
  41     int tls_aad_len;            /* TLS AAD length */
  42 } EVP_ARIA_GCM_CTX;
  43
  44 /* ARIA CCM context */
  45 typedef struct {
  46     union {
  47         OSSL_UNION_ALIGN;
  48         ARIA_KEY ks;
  49     } ks;                       /* ARIA key schedule to use */
  50     int key_set;                /* Set if key initialised */
  51     int iv_set;                 /* Set if an iv is set */
  52     int tag_set;                /* Set if tag is valid */
  53     int len_set;                /* Set if message length set */
  54     int L, M;                   /* L and M parameters from RFC3610 */
  55     int tls_aad_len;            /* TLS AAD length */
  56     CCM128_CONTEXT ccm;
  57     ccm128_f str;
  58 } EVP_ARIA_CCM_CTX;
  59
  60 /* The subkey for ARIA is generated. */
  61 static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  62                             const unsigned char *iv, int enc)
  63 {
  64     int ret;
  65     int mode = EVP_CIPHER_CTX_get_mode(ctx);
  66
  67     if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE))
  68         ret = ossl_aria_set_encrypt_key(key,
  69                                         EVP_CIPHER_CTX_get_key_length(ctx) * 8,
  70                                         EVP_CIPHER_CTX_get_cipher_data(ctx));
  71     else
  72         ret = ossl_aria_set_decrypt_key(key,
  73                                         EVP_CIPHER_CTX_get_key_length(ctx) * 8,
  74                                         EVP_CIPHER_CTX_get_cipher_data(ctx));
  75     if (ret < 0) {
  76         ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
  77         return 0;
  78     }
  79     return 1;
  80 }
  81
  82 static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out,
  83                              size_t len, const ARIA_KEY *key,
  84                              unsigned char *ivec, const int enc)
  85 {
  86
  87     if (enc)
  88         CRYPTO_cbc128_encrypt(in, out, len, key, ivec,
  89                               (block128_f) ossl_aria_encrypt);
  90     else
  91         CRYPTO_cbc128_decrypt(in, out, len, key, ivec,
  92                               (block128_f) ossl_aria_encrypt);
  93 }
  94
  95 static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out,
  96                                 size_t length, const ARIA_KEY *key,
  97                                 unsigned char *ivec, int *num, const int enc)
  98 {
  99
 100     CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
 101                           (block128_f) ossl_aria_encrypt);
 102 }
 103
 104 static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out,
 105                               size_t length, const ARIA_KEY *key,
 106                               unsigned char *ivec, int *num, const int enc)
 107 {
 108     CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
 109                             (block128_f) ossl_aria_encrypt);
 110 }
 111
 112 static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out,
 113                               size_t length, const ARIA_KEY *key,
 114                               unsigned char *ivec, int *num, const int enc)
 115 {
 116     CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
 117                             (block128_f) ossl_aria_encrypt);
 118 }
 119
 120 static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out,
 121                              const ARIA_KEY *key, const int enc)
 122 {
 123     ossl_aria_encrypt(in, out, key);
 124 }
 125
 126 static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out,
 127                              size_t length, const ARIA_KEY *key,
 128                              unsigned char *ivec, int *num)
 129 {
 130     CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
 131                          (block128_f) ossl_aria_encrypt);
 132 }
 133
 134 IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY,
 135                         NID_aria_128, 16, 16, 16, 128,
 136                         0, aria_init_key, NULL,
 137                         EVP_CIPHER_set_asn1_iv,
 138                         EVP_CIPHER_get_asn1_iv,
 139                         NULL)
 140 IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY,
 141                         NID_aria_192, 16, 24, 16, 128,
 142                         0, aria_init_key, NULL,
 143                         EVP_CIPHER_set_asn1_iv,
 144                         EVP_CIPHER_get_asn1_iv,
 145                         NULL)
 146 IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY,
 147                         NID_aria_256, 16, 32, 16, 128,
 148                         0, aria_init_key, NULL,
 149                         EVP_CIPHER_set_asn1_iv,
 150                         EVP_CIPHER_get_asn1_iv,
 151                         NULL)
 152
 153 # define IMPLEMENT_ARIA_CFBR(ksize,cbits) \
 154                 IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0)
 155 IMPLEMENT_ARIA_CFBR(128,1)
 156 IMPLEMENT_ARIA_CFBR(192,1)
 157 IMPLEMENT_ARIA_CFBR(256,1)
 158 IMPLEMENT_ARIA_CFBR(128,8)
 159 IMPLEMENT_ARIA_CFBR(192,8)
 160 IMPLEMENT_ARIA_CFBR(256,8)
 161
 162 # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 163 static const EVP_CIPHER aria_##keylen##_##mode = { \
 164         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 165         flags|EVP_CIPH_##MODE##_MODE,   \
 166         EVP_ORIG_GLOBAL,                \
 167         aria_init_key,                  \
 168         aria_##mode##_cipher,           \
 169         NULL,                           \
 170         sizeof(EVP_ARIA_KEY),           \
 171         NULL,NULL,NULL,NULL };          \
 172 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
 173 { return &aria_##keylen##_##mode; }
 174
 175 static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 176                                const unsigned char *in, size_t len)
 177 {
 178     int n = EVP_CIPHER_CTX_get_num(ctx);
 179     unsigned int num;
 180     EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY, ctx);
 181
 182     if (n < 0)
 183         return 0;
 184     num = (unsigned int)n;
 185
 186     CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv,
 187                           EVP_CIPHER_CTX_buf_noconst(ctx), &num,
 188                           (block128_f) ossl_aria_encrypt);
 189     EVP_CIPHER_CTX_set_num(ctx, num);
 190     return 1;
 191 }
 192
 193 BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0)
 194 BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0)
 195 BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0)
 196
 197 /* Authenticated cipher modes (GCM/CCM) */
 198
 199 /* increment counter (64-bit int) by 1 */
 200 static void ctr64_inc(unsigned char *counter)
 201 {
 202     int n = 8;
 203     unsigned char c;
 204
 205     do {
 206         --n;
 207         c = counter[n];
 208         ++c;
 209         counter[n] = c;
 210         if (c)
 211             return;
 212     } while (n);
 213 }
 214
 215 static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 216                                  const unsigned char *iv, int enc)
 217 {
 218     int ret;
 219     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
 220
 221     if (!iv && !key)
 222         return 1;
 223     if (key) {
 224         ret = ossl_aria_set_encrypt_key(key,
 225                                         EVP_CIPHER_CTX_get_key_length(ctx) * 8,
 226                                         &gctx->ks.ks);
 227         CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
 228                            (block128_f) ossl_aria_encrypt);
 229         if (ret < 0) {
 230             ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
 231             return 0;
 232         }
 233
 234         /*
 235          * If we have an iv can set it directly, otherwise use saved IV.
 236          */
 237         if (iv == NULL && gctx->iv_set)
 238             iv = gctx->iv;
 239         if (iv) {
 240             CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 241             gctx->iv_set = 1;
 242         }
 243         gctx->key_set = 1;
 244     } else {
 245         /* If key set use IV, otherwise copy */
 246         if (gctx->key_set)
 247             CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 248         else
 249             memcpy(gctx->iv, iv, gctx->ivlen);
 250         gctx->iv_set = 1;
 251         gctx->iv_gen = 0;
 252     }
 253     return 1;
 254 }
 255
 256 static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 257 {
 258     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, c);
 259
 260     switch (type) {
 261     case EVP_CTRL_INIT:
 262         gctx->key_set = 0;
 263         gctx->iv_set = 0;
 264         gctx->ivlen = EVP_CIPHER_get_iv_length(c->cipher);
 265         gctx->iv = c->iv;
 266         gctx->taglen = -1;
 267         gctx->iv_gen = 0;
 268         gctx->tls_aad_len = -1;
 269         return 1;
 270
 271     case EVP_CTRL_GET_IVLEN:
 272         *(int *)ptr = gctx->ivlen;
 273         return 1;
 274
 275     case EVP_CTRL_AEAD_SET_IVLEN:
 276         if (arg <= 0)
 277             return 0;
 278         /* Allocate memory for IV if needed */
 279         if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
 280             if (gctx->iv != c->iv)
 281                 OPENSSL_free(gctx->iv);
 282             if ((gctx->iv = OPENSSL_malloc(arg)) == NULL)
 283                 return 0;
 284         }
 285         gctx->ivlen = arg;
 286         return 1;
 287
 288     case EVP_CTRL_AEAD_SET_TAG:
 289         if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_is_encrypting(c))
 290             return 0;
 291         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 292         gctx->taglen = arg;
 293         return 1;
 294
 295     case EVP_CTRL_AEAD_GET_TAG:
 296         if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_is_encrypting(c)
 297             || gctx->taglen < 0)
 298             return 0;
 299         memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg);
 300         return 1;
 301
 302     case EVP_CTRL_GCM_SET_IV_FIXED:
 303         /* Special case: -1 length restores whole IV */
 304         if (arg == -1) {
 305             memcpy(gctx->iv, ptr, gctx->ivlen);
 306             gctx->iv_gen = 1;
 307             return 1;
 308         }
 309         /*
 310          * Fixed field must be at least 4 bytes and invocation field at least
 311          * 8.
 312          */
 313         if ((arg < 4) || (gctx->ivlen - arg) < 8)
 314             return 0;
 315         if (arg)
 316             memcpy(gctx->iv, ptr, arg);
 317         if (EVP_CIPHER_CTX_is_encrypting(c)
 318             && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 319             return 0;
 320         gctx->iv_gen = 1;
 321         return 1;
 322
 323     case EVP_CTRL_GCM_IV_GEN:
 324         if (gctx->iv_gen == 0 || gctx->key_set == 0)
 325             return 0;
 326         CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 327         if (arg <= 0 || arg > gctx->ivlen)
 328             arg = gctx->ivlen;
 329         memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 330         /*
 331          * Invocation field will be at least 8 bytes in size and so no need
 332          * to check wrap around or increment more than last 8 bytes.
 333          */
 334         ctr64_inc(gctx->iv + gctx->ivlen - 8);
 335         gctx->iv_set = 1;
 336         return 1;
 337
 338     case EVP_CTRL_GCM_SET_IV_INV:
 339         if (gctx->iv_gen == 0 || gctx->key_set == 0
 340             || EVP_CIPHER_CTX_is_encrypting(c))
 341             return 0;
 342         memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 343         CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 344         gctx->iv_set = 1;
 345         return 1;
 346
 347     case EVP_CTRL_AEAD_TLS1_AAD:
 348         /* Save the AAD for later use */
 349         if (arg != EVP_AEAD_TLS1_AAD_LEN)
 350             return 0;
 351         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 352         gctx->tls_aad_len = arg;
 353         {
 354             unsigned int len =
 355                 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
 356                 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
 357             /* Correct length for explicit IV */
 358             if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
 359                 return 0;
 360             len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 361             /* If decrypting correct for tag too */
 362             if (!EVP_CIPHER_CTX_is_encrypting(c)) {
 363                 if (len < EVP_GCM_TLS_TAG_LEN)
 364                     return 0;
 365                 len -= EVP_GCM_TLS_TAG_LEN;
 366             }
 367             EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
 368             EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
 369         }
 370         /* Extra padding: tag appended to record */
 371         return EVP_GCM_TLS_TAG_LEN;
 372
 373     case EVP_CTRL_COPY:
 374         {
 375             EVP_CIPHER_CTX *out = ptr;
 376             EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX, out);
 377             if (gctx->gcm.key) {
 378                 if (gctx->gcm.key != &gctx->ks)
 379                     return 0;
 380                 gctx_out->gcm.key = &gctx_out->ks;
 381             }
 382             if (gctx->iv == c->iv)
 383                 gctx_out->iv = out->iv;
 384             else {
 385                 if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL)
 386                     return 0;
 387                 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
 388             }
 389             return 1;
 390         }
 391
 392     default:
 393         return -1;
 394
 395     }
 396 }
 397
 398 static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 399                               const unsigned char *in, size_t len)
 400 {
 401     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
 402     int rv = -1;
 403
 404     /* Encrypt/decrypt must be performed in place */
 405     if (out != in
 406         || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
 407         return -1;
 408     /*
 409      * Set IV from start of buffer or generate IV and write to start of
 410      * buffer.
 411      */
 412     if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_is_encrypting(ctx) ?
 413                             EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 414                             EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 415         goto err;
 416     /* Use saved AAD */
 417     if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
 418                           gctx->tls_aad_len))
 419         goto err;
 420     /* Fix buffer and length to point to payload */
 421     in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 422     out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 423     len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 424     if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
 425         /* Encrypt payload */
 426         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 427             goto err;
 428         out += len;
 429         /* Finally write tag */
 430         CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 431         rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 432     } else {
 433         /* Decrypt */
 434         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 435             goto err;
 436         /* Retrieve tag */
 437         CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
 438                           EVP_GCM_TLS_TAG_LEN);
 439         /* If tag mismatch wipe buffer */
 440         if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len,
 441                           EVP_GCM_TLS_TAG_LEN)) {
 442             OPENSSL_cleanse(out, len);
 443             goto err;
 444         }
 445         rv = len;
 446     }
 447
 448  err:
 449     gctx->iv_set = 0;
 450     gctx->tls_aad_len = -1;
 451     return rv;
 452 }
 453
 454 static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 455                           const unsigned char *in, size_t len)
 456 {
 457     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
 458
 459     /* If not set up, return error */
 460     if (!gctx->key_set)
 461         return -1;
 462
 463     if (gctx->tls_aad_len >= 0)
 464         return aria_gcm_tls_cipher(ctx, out, in, len);
 465
 466     if (!gctx->iv_set)
 467         return -1;
 468     if (in) {
 469         if (out == NULL) {
 470             if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 471                 return -1;
 472         } else if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
 473             if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 474                 return -1;
 475         } else {
 476             if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 477                 return -1;
 478         }
 479         return len;
 480     }
 481     if (!EVP_CIPHER_CTX_is_encrypting(ctx)) {
 482         if (gctx->taglen < 0)
 483             return -1;
 484         if (CRYPTO_gcm128_finish(&gctx->gcm,
 485                                  EVP_CIPHER_CTX_buf_noconst(ctx),
 486                                  gctx->taglen) != 0)
 487             return -1;
 488         gctx->iv_set = 0;
 489         return 0;
 490     }
 491     CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);
 492     gctx->taglen = 16;
 493     /* Don't reuse the IV */
 494     gctx->iv_set = 0;
 495     return 0;
 496 }
 497
 498 static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx)
 499 {
 500     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
 501
 502     if (gctx->iv != ctx->iv)
 503         OPENSSL_free(gctx->iv);
 504
 505     return 1;
 506 }
 507
 508 static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 509                             const unsigned char *iv, int enc)
 510 {
 511     int ret;
 512     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
 513
 514     if (!iv && !key)
 515         return 1;
 516
 517     if (key) {
 518         ret = ossl_aria_set_encrypt_key(key,
 519                                         EVP_CIPHER_CTX_get_key_length(ctx) * 8,
 520                                         &cctx->ks.ks);
 521         CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 522                            &cctx->ks, (block128_f) ossl_aria_encrypt);
 523         if (ret < 0) {
 524             ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
 525             return 0;
 526         }
 527         cctx->str = NULL;
 528         cctx->key_set = 1;
 529     }
 530     if (iv) {
 531         memcpy(ctx->iv, iv, 15 - cctx->L);
 532         cctx->iv_set = 1;
 533     }
 534     return 1;
 535 }
 536
 537 static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 538 {
 539     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, c);
 540
 541     switch (type) {
 542     case EVP_CTRL_INIT:
 543         cctx->key_set = 0;
 544         cctx->iv_set = 0;
 545         cctx->L = 8;
 546         cctx->M = 12;
 547         cctx->tag_set = 0;
 548         cctx->len_set = 0;
 549         cctx->tls_aad_len = -1;
 550         return 1;
 551
 552     case EVP_CTRL_GET_IVLEN:
 553         *(int *)ptr = 15 - cctx->L;
 554         return 1;
 555
 556     case EVP_CTRL_AEAD_TLS1_AAD:
 557         /* Save the AAD for later use */
 558         if (arg != EVP_AEAD_TLS1_AAD_LEN)
 559             return 0;
 560         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 561         cctx->tls_aad_len = arg;
 562         {
 563             uint16_t len =
 564                 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
 565                 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
 566             /* Correct length for explicit IV */
 567             if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN)
 568                 return 0;
 569             len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
 570             /* If decrypting correct for tag too */
 571             if (!EVP_CIPHER_CTX_is_encrypting(c)) {
 572                 if (len < cctx->M)
 573                     return 0;
 574                 len -= cctx->M;
 575             }
 576             EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
 577             EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
 578         }
 579         /* Extra padding: tag appended to record */
 580         return cctx->M;
 581
 582     case EVP_CTRL_CCM_SET_IV_FIXED:
 583         /* Sanity check length */
 584         if (arg != EVP_CCM_TLS_FIXED_IV_LEN)
 585             return 0;
 586         /* Just copy to first part of IV */
 587         memcpy(c->iv, ptr, arg);
 588         return 1;
 589
 590     case EVP_CTRL_AEAD_SET_IVLEN:
 591         arg = 15 - arg;
 592         /* fall through */
 593     case EVP_CTRL_CCM_SET_L:
 594         if (arg < 2 || arg > 8)
 595             return 0;
 596         cctx->L = arg;
 597         return 1;
 598     case EVP_CTRL_AEAD_SET_TAG:
 599         if ((arg & 1) || arg < 4 || arg > 16)
 600             return 0;
 601         if (EVP_CIPHER_CTX_is_encrypting(c) && ptr)
 602             return 0;
 603         if (ptr) {
 604             cctx->tag_set = 1;
 605             memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 606         }
 607         cctx->M = arg;
 608         return 1;
 609
 610     case EVP_CTRL_AEAD_GET_TAG:
 611         if (!EVP_CIPHER_CTX_is_encrypting(c) || !cctx->tag_set)
 612             return 0;
 613         if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
 614             return 0;
 615         cctx->tag_set = 0;
 616         cctx->iv_set = 0;
 617         cctx->len_set = 0;
 618         return 1;
 619
 620     case EVP_CTRL_COPY:
 621         {
 622             EVP_CIPHER_CTX *out = ptr;
 623             EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX, out);
 624             if (cctx->ccm.key) {
 625                 if (cctx->ccm.key != &cctx->ks)
 626                     return 0;
 627                 cctx_out->ccm.key = &cctx_out->ks;
 628             }
 629             return 1;
 630         }
 631
 632     default:
 633         return -1;
 634     }
 635 }
 636
 637 static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 638                               const unsigned char *in, size_t len)
 639 {
 640     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
 641     CCM128_CONTEXT *ccm = &cctx->ccm;
 642
 643     /* Encrypt/decrypt must be performed in place */
 644     if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))
 645         return -1;
 646     /* If encrypting set explicit IV from sequence number (start of AAD) */
 647     if (EVP_CIPHER_CTX_is_encrypting(ctx))
 648         memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),
 649                EVP_CCM_TLS_EXPLICIT_IV_LEN);
 650     /* Get rest of IV from explicit IV */
 651     memcpy(ctx->iv + EVP_CCM_TLS_FIXED_IV_LEN, in,
 652            EVP_CCM_TLS_EXPLICIT_IV_LEN);
 653     /* Correct length value */
 654     len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
 655     if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,
 656                             len))
 657             return -1;
 658     /* Use saved AAD */
 659     CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx),
 660                       cctx->tls_aad_len);
 661     /* Fix buffer to point to payload */
 662     in += EVP_CCM_TLS_EXPLICIT_IV_LEN;
 663     out += EVP_CCM_TLS_EXPLICIT_IV_LEN;
 664     if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
 665         if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
 666                       : CRYPTO_ccm128_encrypt(ccm, in, out, len))
 667             return -1;
 668         if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))
 669             return -1;
 670         return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
 671     } else {
 672         if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str)
 673                       : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
 674             unsigned char tag[16];
 675             if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
 676                 if (!CRYPTO_memcmp(tag, in + len, cctx->M))
 677                     return len;
 678             }
 679         }
 680         OPENSSL_cleanse(out, len);
 681         return -1;
 682     }
 683 }
 684
 685 static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 686                           const unsigned char *in, size_t len)
 687 {
 688     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
 689     CCM128_CONTEXT *ccm = &cctx->ccm;
 690
 691     /* If not set up, return error */
 692     if (!cctx->key_set)
 693         return -1;
 694
 695     if (cctx->tls_aad_len >= 0)
 696         return aria_ccm_tls_cipher(ctx, out, in, len);
 697
 698     /* EVP_*Final() doesn't return any data */
 699     if (in == NULL && out != NULL)
 700         return 0;
 701
 702     if (!cctx->iv_set)
 703         return -1;
 704
 705     if (!out) {
 706         if (!in) {
 707             if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 708                 return -1;
 709             cctx->len_set = 1;
 710             return len;
 711         }
 712         /* If have AAD need message length */
 713         if (!cctx->len_set && len)
 714             return -1;
 715         CRYPTO_ccm128_aad(ccm, in, len);
 716         return len;
 717     }
 718
 719     /* The tag must be set before actually decrypting data */
 720     if (!EVP_CIPHER_CTX_is_encrypting(ctx) && !cctx->tag_set)
 721         return -1;
 722
 723     /* If not set length yet do it */
 724     if (!cctx->len_set) {
 725         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 726             return -1;
 727         cctx->len_set = 1;
 728     }
 729     if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
 730         if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
 731                       : CRYPTO_ccm128_encrypt(ccm, in, out, len))
 732             return -1;
 733         cctx->tag_set = 1;
 734         return len;
 735     } else {
 736         int rv = -1;
 737         if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
 738                                                      cctx->str) :
 739             !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
 740             unsigned char tag[16];
 741             if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
 742                 if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),
 743                                    cctx->M))
 744                     rv = len;
 745             }
 746         }
 747         if (rv == -1)
 748             OPENSSL_cleanse(out, len);
 749         cctx->iv_set = 0;
 750         cctx->tag_set = 0;
 751         cctx->len_set = 0;
 752         return rv;
 753     }
 754 }
 755
 756 #define aria_ccm_cleanup    NULL
 757
 758 #define ARIA_AUTH_FLAGS  (EVP_CIPH_FLAG_DEFAULT_ASN1 \
 759                           | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
 760                           | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
 761                           | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \
 762                           | EVP_CIPH_CUSTOM_IV_LENGTH)
 763
 764 #define BLOCK_CIPHER_aead(keylen,mode,MODE)        \
 765 static const EVP_CIPHER aria_##keylen##_##mode = { \
 766         NID_aria_##keylen##_##mode,                \
 767         1, keylen/8, 12,                           \
 768         ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE,    \
 769         EVP_ORIG_GLOBAL,                           \
 770         aria_##mode##_init_key,                    \
 771         aria_##mode##_cipher,                      \
 772         aria_##mode##_cleanup,                     \
 773         sizeof(EVP_ARIA_##MODE##_CTX),             \
 774         NULL,NULL,aria_##mode##_ctrl,NULL };       \
 775 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
 776 { return (EVP_CIPHER*)&aria_##keylen##_##mode; }
 777
 778 BLOCK_CIPHER_aead(128, gcm, GCM)
 779 BLOCK_CIPHER_aead(192, gcm, GCM)
 780 BLOCK_CIPHER_aead(256, gcm, GCM)
 781
 782 BLOCK_CIPHER_aead(128, ccm, CCM)
 783 BLOCK_CIPHER_aead(192, ccm, CCM)
 784 BLOCK_CIPHER_aead(256, ccm, CCM)
 785
 786 #endif