1 /**
2  * \file cipher_internal.h
3  *
4  * \brief Cipher wrappers.
5  *
6  * \author Adriaan de Jong <dejong@fox-it.com>
7  *
8  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
9  *  SPDX-License-Identifier: Apache-2.0
10  *
11  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
12  *  not use this file except in compliance with the License.
13  *  You may obtain a copy of the License at
14  *
15  *  http://www.apache.org/licenses/LICENSE-2.0
16  *
17  *  Unless required by applicable law or agreed to in writing, software
18  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
19  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20  *  See the License for the specific language governing permissions and
21  *  limitations under the License.
22  *
23  *  This file is part of mbed TLS (https://tls.mbed.org)
24  */
25 #ifndef MBEDTLS_CIPHER_WRAP_H
26 #define MBEDTLS_CIPHER_WRAP_H
27 
28 #if !defined(MBEDTLS_CONFIG_FILE)
29 #include "config.h"
30 #else
31 #include MBEDTLS_CONFIG_FILE
32 #endif
33 
34 #include "cipher.h"
35 
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39 
40 /**
41  * Base cipher information. The non-mode specific functions and values.
42  */
43 struct mbedtls_cipher_base_t
44 {
45     /** Base Cipher type (e.g. MBEDTLS_CIPHER_ID_AES) */
46     mbedtls_cipher_id_t cipher;
47 
48     /** Encrypt using ECB */
49     int (*ecb_func)( void *ctx, mbedtls_operation_t mode,
50                      const unsigned char *input, unsigned char *output );
51 
52 #if defined(MBEDTLS_CIPHER_MODE_CBC)
53     /** Encrypt using CBC */
54     int (*cbc_func)( void *ctx, mbedtls_operation_t mode, size_t length,
55                      unsigned char *iv, const unsigned char *input,
56                      unsigned char *output );
57 #endif
58 
59 #if defined(MBEDTLS_CIPHER_MODE_CFB)
60     /** Encrypt using CFB (Full length) */
61     int (*cfb_func)( void *ctx, mbedtls_operation_t mode, size_t length, size_t *iv_off,
62                      unsigned char *iv, const unsigned char *input,
63                      unsigned char *output );
64 #endif
65 
66 #if defined(MBEDTLS_CIPHER_MODE_CTR)
67     /** Encrypt using CTR */
68     int (*ctr_func)( void *ctx, size_t length, size_t *nc_off,
69                      unsigned char *nonce_counter, unsigned char *stream_block,
70                      const unsigned char *input, unsigned char *output );
71 #endif
72 
73 #if defined(MBEDTLS_CIPHER_MODE_STREAM)
74     /** Encrypt using STREAM */
75     int (*stream_func)( void *ctx, size_t length,
76                         const unsigned char *input, unsigned char *output );
77 #endif
78 
79     /** Set key for encryption purposes */
80     int (*setkey_enc_func)( void *ctx, const unsigned char *key,
81                             unsigned int key_bitlen );
82 
83     /** Set key for decryption purposes */
84     int (*setkey_dec_func)( void *ctx, const unsigned char *key,
85                             unsigned int key_bitlen);
86 
87     /** Allocate a new context */
88     void * (*ctx_alloc_func)( void );
89 
90     /** Free the given context */
91     void (*ctx_free_func)( void *ctx );
92 
93 };
94 
95 typedef struct
96 {
97     mbedtls_cipher_type_t type;
98     const mbedtls_cipher_info_t *info;
99 } mbedtls_cipher_definition_t;
100 
101 extern const mbedtls_cipher_definition_t mbedtls_cipher_definitions[];
102 
103 extern int mbedtls_cipher_supported[];
104 
105 #ifdef __cplusplus
106 }
107 #endif
108 
109 #endif /* MBEDTLS_CIPHER_WRAP_H */
110