crypto/cipher.c

   1 /*
   2  * QEMU Crypto cipher algorithms
   3  *
   4  * Copyright (c) 2015 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "crypto/cipher.h"
  22
  23 static size_t alg_key_len[QCRYPTO_CIPHER_ALG_LAST] = {
  24     [QCRYPTO_CIPHER_ALG_AES_128] = 16,
  25     [QCRYPTO_CIPHER_ALG_AES_192] = 24,
  26     [QCRYPTO_CIPHER_ALG_AES_256] = 32,
  27     [QCRYPTO_CIPHER_ALG_DES_RFB] = 8,
  28 };
  29
  30 static bool
  31 qcrypto_cipher_validate_key_length(QCryptoCipherAlgorithm alg,
  32                                    size_t nkey,
  33                                    Error **errp)
  34 {
  35     if ((unsigned)alg >= QCRYPTO_CIPHER_ALG_LAST) {
  36         error_setg(errp, "Cipher algorithm %d out of range",
  37                    alg);
  38         return false;
  39     }
  40
  41     if (alg_key_len[alg] != nkey) {
  42         error_setg(errp, "Cipher key length %zu should be %zu",
  43                    alg_key_len[alg], nkey);
  44         return false;
  45     }
  46     return true;
  47 }
  48
  49 #include "crypto/cipher-builtin.c"