1 /* ==================================================================== 2 * Copyright (c) 2002-2006 The OpenSSL Project. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * 3. All advertising materials mentioning features or use of this 17 * software must display the following acknowledgment: 18 * "This product includes software developed by the OpenSSL Project 19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 20 * 21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 22 * endorse or promote products derived from this software without 23 * prior written permission. For written permission, please contact 24 * openssl-core (at) openssl.org. 25 * 26 * 5. Products derived from this software may not be called "OpenSSL" 27 * nor may "OpenSSL" appear in their names without prior written 28 * permission of the OpenSSL Project. 29 * 30 * 6. Redistributions of any form whatsoever must retain the following 31 * acknowledgment: 32 * "This product includes software developed by the OpenSSL Project 33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 34 * 35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 46 * OF THE POSSIBILITY OF SUCH DAMAGE. 47 * ==================================================================== */ 48 49 #ifndef OPENSSL_HEADER_AES_H 50 #define OPENSSL_HEADER_AES_H 51 52 #include <openssl/base.h> 53 54 #if defined(__cplusplus) 55 extern "C" { 56 #endif 57 58 59 /* Raw AES functions. */ 60 61 62 #define AES_ENCRYPT 1 63 #define AES_DECRYPT 0 64 65 /* AES_MAXNR is the maximum number of AES rounds. */ 66 #define AES_MAXNR 14 67 68 #define AES_BLOCK_SIZE 16 69 70 /* aes_key_st should be an opaque type, but EVP requires that the size be 71 * known. */ 72 struct aes_key_st { 73 uint32_t rd_key[4 * (AES_MAXNR + 1)]; 74 unsigned rounds; 75 }; 76 typedef struct aes_key_st AES_KEY; 77 78 /* AES_set_encrypt_key configures |aeskey| to encrypt with the |bits|-bit key, 79 * |key|. 80 * 81 * WARNING: unlike other OpenSSL functions, this returns zero on success and a 82 * negative number on error. */ 83 OPENSSL_EXPORT int AES_set_encrypt_key(const uint8_t *key, unsigned bits, 84 AES_KEY *aeskey); 85 86 /* AES_set_decrypt_key configures |aeskey| to decrypt with the |bits|-bit key, 87 * |key|. 88 * 89 * WARNING: unlike other OpenSSL functions, this returns zero on success and a 90 * negative number on error. */ 91 OPENSSL_EXPORT int AES_set_decrypt_key(const uint8_t *key, unsigned bits, 92 AES_KEY *aeskey); 93 94 /* AES_encrypt encrypts a single block from |in| to |out| with |key|. The |in| 95 * and |out| pointers may overlap. */ 96 OPENSSL_EXPORT void AES_encrypt(const uint8_t *in, uint8_t *out, 97 const AES_KEY *key); 98 99 /* AES_decrypt decrypts a single block from |in| to |out| with |key|. The |in| 100 * and |out| pointers may overlap. */ 101 OPENSSL_EXPORT void AES_decrypt(const uint8_t *in, uint8_t *out, 102 const AES_KEY *key); 103 104 105 /* Block cipher modes. */ 106 107 /* AES_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode) |len| 108 * bytes from |in| to |out|. The |num| parameter must be set to zero on the 109 * first call and |ivec| will be incremented. */ 110 OPENSSL_EXPORT void AES_ctr128_encrypt(const uint8_t *in, uint8_t *out, 111 size_t len, const AES_KEY *key, 112 uint8_t ivec[AES_BLOCK_SIZE], 113 uint8_t ecount_buf[AES_BLOCK_SIZE], 114 unsigned int *num); 115 116 /* AES_ecb_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) a single, 117 * 16 byte block from |in| to |out|. */ 118 OPENSSL_EXPORT void AES_ecb_encrypt(const uint8_t *in, uint8_t *out, 119 const AES_KEY *key, const int enc); 120 121 /* AES_cbc_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len| 122 * bytes from |in| to |out|. The length must be a multiple of the block size. */ 123 OPENSSL_EXPORT void AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len, 124 const AES_KEY *key, uint8_t *ivec, 125 const int enc); 126 127 /* AES_ofb128_encrypt encrypts (or decrypts, it's the same in OFB mode) |len| 128 * bytes from |in| to |out|. The |num| parameter must be set to zero on the 129 * first call. */ 130 OPENSSL_EXPORT void AES_ofb128_encrypt(const uint8_t *in, uint8_t *out, 131 size_t len, const AES_KEY *key, 132 uint8_t *ivec, int *num); 133 134 /* AES_cfb128_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len| 135 * bytes from |in| to |out|. The |num| parameter must be set to zero on the 136 * first call. */ 137 OPENSSL_EXPORT void AES_cfb128_encrypt(const uint8_t *in, uint8_t *out, 138 size_t len, const AES_KEY *key, 139 uint8_t *ivec, int *num, int enc); 140 141 142 /* Android compatibility section. 143 * 144 * These functions are declared, temporarily, for Android because 145 * wpa_supplicant will take a little time to sync with upstream. Outside of 146 * Android they'll have no definition. */ 147 148 OPENSSL_EXPORT int AES_wrap_key(AES_KEY *key, const uint8_t *iv, uint8_t *out, 149 const uint8_t *in, unsigned in_len); 150 OPENSSL_EXPORT int AES_unwrap_key(AES_KEY *key, const uint8_t *iv, uint8_t *out, 151 const uint8_t *in, unsigned in_len); 152 153 154 #if defined(__cplusplus) 155 } /* extern C */ 156 #endif 157 158 #endif /* OPENSSL_HEADER_AES_H */ 159
