uspace/lib/crypto/crypto.h

   1 /*
   2  * Copyright (c) 2015 Jan Kolarik
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef LIBCRYPTO_H
  30 #define LIBCRYPTO_H
  31
  32 #include <errno.h>
  33 #include <stddef.h>
  34 #include <stdint.h>
  35
  36 #define AES_CIPHER_LENGTH  16
  37 #define PBKDF2_KEY_LENGTH  32
  38
  39 /* Left rotation for uint32_t. */
  40 #define rotl_uint32(val, shift) \
  41         (((val) << shift) | ((val) >> (32 - shift)))
  42
  43 /* Right rotation for uint32_t. */
  44 #define rotr_uint32(val, shift) \
  45         (((val) >> shift) | ((val) << (32 - shift)))
  46
  47 /** Hash function selector and also result hash length indicator. */
  48 typedef enum {
  49         HASH_MD5 =  16,
  50         HASH_SHA1 = 20
  51 } hash_func_t;
  52
  53 extern errno_t rc4(uint8_t *, size_t, uint8_t *, size_t, size_t, uint8_t *);
  54 extern errno_t aes_encrypt(uint8_t *, uint8_t *, uint8_t *);
  55 extern errno_t aes_decrypt(uint8_t *, uint8_t *, uint8_t *);
  56 extern errno_t create_hash(uint8_t *, size_t, uint8_t *, hash_func_t);
  57 extern errno_t hmac(uint8_t *, size_t, uint8_t *, size_t, uint8_t *, hash_func_t);
  58 extern errno_t pbkdf2(uint8_t *, size_t, uint8_t *, size_t, uint8_t *);
  59
  60 extern uint16_t crc16_ibm(uint16_t crc, uint8_t *buf, size_t len);
  61
  62 #endif