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