libkern/libkern/crypto/aes.h

   1 /*
   2  * Copyright (c) 2012 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _AES_H
  30 #define _AES_H
  31
  32 #if defined(__cplusplus)
  33 extern "C"
  34 {
  35 #endif
  36
  37 #include <corecrypto/ccmode.h>
  38 #include <corecrypto/ccn.h>
  39
  40 #define AES_BLOCK_SIZE  16  /* the AES block size in bytes          */
  41
  42 //Unholy HACK: this works because we know the size of the context for every
  43 //possible corecrypto implementation is less than this.
  44 #define AES_CBC_CTX_MAX_SIZE (ccn_sizeof_size(sizeof(void *)) + ccn_sizeof_size(AES_BLOCK_SIZE) + ccn_sizeof_size(64*4))
  45
  46 typedef struct{
  47         cccbc_ctx_decl(AES_CBC_CTX_MAX_SIZE, ctx);
  48 } aes_decrypt_ctx;
  49
  50 typedef struct{
  51         cccbc_ctx_decl(AES_CBC_CTX_MAX_SIZE, ctx);
  52 } aes_encrypt_ctx;
  53
  54 typedef struct
  55 {
  56         aes_decrypt_ctx decrypt;
  57         aes_encrypt_ctx encrypt;
  58 } aes_ctx;
  59
  60
  61 /* for compatibility with old apis*/
  62 #define aes_ret     int
  63 #define aes_good    0
  64 #define aes_error  -1
  65 #define aes_rval    aes_ret
  66
  67
  68
  69 /* Key lengths in the range 16 <= key_len <= 32 are given in bytes, */
  70 /* those in the range 128 <= key_len <= 256 are given in bits       */
  71
  72 aes_rval aes_encrypt_key(const unsigned char *key, int key_len, aes_encrypt_ctx cx[1]);
  73 aes_rval aes_encrypt_key128(const unsigned char *key, aes_encrypt_ctx cx[1]);
  74 aes_rval aes_encrypt_key256(const unsigned char *key, aes_encrypt_ctx cx[1]);
  75
  76 #if defined (__i386__) || defined (__x86_64__)
  77 aes_rval aes_encrypt(const unsigned char *in, unsigned char *out, aes_encrypt_ctx cx[1]);
  78 #endif
  79
  80 aes_rval aes_encrypt_cbc(const unsigned char *in_blk, const unsigned char *in_iv, unsigned int num_blk,
  81                                          unsigned char *out_blk, aes_encrypt_ctx cx[1]);
  82
  83
  84 aes_rval aes_decrypt_key(const unsigned char *key, int key_len, aes_decrypt_ctx cx[1]);
  85 aes_rval aes_decrypt_key128(const unsigned char *key, aes_decrypt_ctx cx[1]);
  86 aes_rval aes_decrypt_key256(const unsigned char *key, aes_decrypt_ctx cx[1]);
  87
  88 #if defined (__i386__) || defined (__x86_64__)
  89 aes_rval aes_decrypt(const unsigned char *in, unsigned char *out, aes_decrypt_ctx cx[1]);
  90 #endif
  91
  92 aes_rval aes_decrypt_cbc(const unsigned char *in_blk, const unsigned char *in_iv, unsigned int num_blk,
  93                                          unsigned char *out_blk, aes_decrypt_ctx cx[1]);
  94
  95 #if defined(__cplusplus)
  96 }
  97 #endif
  98
  99 #endif