| /* ==================================================================== |
| * Copyright (c) 2002-2006 The OpenSSL Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * openssl-core@openssl.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== */ |
| |
| #ifndef OPENSSL_HEADER_AES_H |
| #define OPENSSL_HEADER_AES_H |
| |
| #include <openssl/base.h> |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| |
| // Raw AES functions. |
| |
| |
| #define AES_ENCRYPT 1 |
| #define AES_DECRYPT 0 |
| |
| // AES_MAXNR is the maximum number of AES rounds. |
| #define AES_MAXNR 14 |
| |
| #define AES_BLOCK_SIZE 16 |
| |
| // aes_key_st should be an opaque type, but EVP requires that the size be |
| // known. |
| struct aes_key_st { |
| uint32_t rd_key[4 * (AES_MAXNR + 1)]; |
| unsigned rounds; |
| }; |
| typedef struct aes_key_st AES_KEY; |
| |
| // AES_set_encrypt_key configures |aeskey| to encrypt with the |bits|-bit key, |
| // |key|. |key| must point to |bits|/8 bytes. It returns zero on success and a |
| // negative number if |bits| is an invalid AES key size. |
| // |
| // WARNING: this function breaks the usual return value convention. |
| OPENSSL_EXPORT int AES_set_encrypt_key(const uint8_t *key, unsigned bits, |
| AES_KEY *aeskey); |
| |
| // AES_set_decrypt_key configures |aeskey| to decrypt with the |bits|-bit key, |
| // |key|. |key| must point to |bits|/8 bytes. It returns zero on success and a |
| // negative number if |bits| is an invalid AES key size. |
| // |
| // WARNING: this function breaks the usual return value convention. |
| OPENSSL_EXPORT int AES_set_decrypt_key(const uint8_t *key, unsigned bits, |
| AES_KEY *aeskey); |
| |
| // AES_encrypt encrypts a single block from |in| to |out| with |key|. The |in| |
| // and |out| pointers may overlap. |
| OPENSSL_EXPORT void AES_encrypt(const uint8_t *in, uint8_t *out, |
| const AES_KEY *key); |
| |
| // AES_decrypt decrypts a single block from |in| to |out| with |key|. The |in| |
| // and |out| pointers may overlap. |
| OPENSSL_EXPORT void AES_decrypt(const uint8_t *in, uint8_t *out, |
| const AES_KEY *key); |
| |
| |
| // Block cipher modes. |
| |
| // AES_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode) |len| |
| // bytes from |in| to |out|. The |num| parameter must be set to zero on the |
| // first call and |ivec| will be incremented. |
| OPENSSL_EXPORT void AES_ctr128_encrypt(const uint8_t *in, uint8_t *out, |
| size_t len, const AES_KEY *key, |
| uint8_t ivec[AES_BLOCK_SIZE], |
| uint8_t ecount_buf[AES_BLOCK_SIZE], |
| unsigned int *num); |
| |
| // AES_ecb_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) a single, |
| // 16 byte block from |in| to |out|. |
| OPENSSL_EXPORT void AES_ecb_encrypt(const uint8_t *in, uint8_t *out, |
| const AES_KEY *key, const int enc); |
| |
| // AES_cbc_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len| |
| // bytes from |in| to |out|. The length must be a multiple of the block size. |
| OPENSSL_EXPORT void AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len, |
| const AES_KEY *key, uint8_t *ivec, |
| const int enc); |
| |
| // AES_ofb128_encrypt encrypts (or decrypts, it's the same in OFB mode) |len| |
| // bytes from |in| to |out|. The |num| parameter must be set to zero on the |
| // first call. |
| OPENSSL_EXPORT void AES_ofb128_encrypt(const uint8_t *in, uint8_t *out, |
| size_t len, const AES_KEY *key, |
| uint8_t *ivec, int *num); |
| |
| // AES_cfb128_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len| |
| // bytes from |in| to |out|. The |num| parameter must be set to zero on the |
| // first call. |
| OPENSSL_EXPORT void AES_cfb128_encrypt(const uint8_t *in, uint8_t *out, |
| size_t len, const AES_KEY *key, |
| uint8_t *ivec, int *num, int enc); |
| |
| |
| // AES key wrap. |
| // |
| // These functions implement AES Key Wrap mode, as defined in RFC 3394. They |
| // should never be used except to interoperate with existing systems that use |
| // this mode. |
| |
| // AES_wrap_key performs AES key wrap on |in| which must be a multiple of 8 |
| // bytes. |iv| must point to an 8 byte value or be NULL to use the default IV. |
| // |key| must have been configured for encryption. On success, it writes |
| // |in_len| + 8 bytes to |out| and returns |in_len| + 8. Otherwise, it returns |
| // -1. |
| OPENSSL_EXPORT int AES_wrap_key(const AES_KEY *key, const uint8_t *iv, |
| uint8_t *out, const uint8_t *in, size_t in_len); |
| |
| // AES_unwrap_key performs AES key unwrap on |in| which must be a multiple of 8 |
| // bytes. |iv| must point to an 8 byte value or be NULL to use the default IV. |
| // |key| must have been configured for decryption. On success, it writes |
| // |in_len| - 8 bytes to |out| and returns |in_len| - 8. Otherwise, it returns |
| // -1. |
| OPENSSL_EXPORT int AES_unwrap_key(const AES_KEY *key, const uint8_t *iv, |
| uint8_t *out, const uint8_t *in, |
| size_t in_len); |
| |
| |
| #if defined(__cplusplus) |
| } // extern C |
| #endif |
| |
| #endif // OPENSSL_HEADER_AES_H |
