/*

** SQLCipher

** sqlcipher.h developed by Stephen Lombardo (Zetetic LLC)

** sjlombardo at zetetic dot net

** http://zetetic.net

**

** Copyright (c) 2008, ZETETIC LLC

** All rights reserved.

**

** Redistribution and use in source and binary forms, with or without

** modification, are permitted provided that the following conditions are met:

** * Redistributions of source code must retain the above copyright

** notice, this list of conditions and the following disclaimer.

** * 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.

** * Neither the name of the ZETETIC LLC nor the

** names of its contributors may be used to endorse or promote products

** derived from this software without specific prior written permission.

**

** THIS SOFTWARE IS PROVIDED BY ZETETIC LLC ''AS IS'' AND ANY

** EXPRESS 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 ZETETIC LLC 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.

**

*/

/* BEGIN SQLCIPHER */

#ifdef SQLITE_HAS_CODEC

#ifndef SQLCIPHER_H

#define SQLCIPHER_H

#define SQLCIPHER_HMAC_SHA1 0

#define SQLCIPHER_HMAC_SHA1_LABEL "HMAC_SHA1"

#define SQLCIPHER_HMAC_SHA256 1

#define SQLCIPHER_HMAC_SHA256_LABEL "HMAC_SHA256"

#define SQLCIPHER_HMAC_SHA512 2

#define SQLCIPHER_HMAC_SHA512_LABEL "HMAC_SHA512"

#define SQLCIPHER_PBKDF2_HMAC_SHA1 0

#define SQLCIPHER_PBKDF2_HMAC_SHA1_LABEL "PBKDF2_HMAC_SHA1"

#define SQLCIPHER_PBKDF2_HMAC_SHA256 1

#define SQLCIPHER_PBKDF2_HMAC_SHA256_LABEL "PBKDF2_HMAC_SHA256"

#define SQLCIPHER_PBKDF2_HMAC_SHA512 2

#define SQLCIPHER_PBKDF2_HMAC_SHA512_LABEL "PBKDF2_HMAC_SHA512"

typedef struct {

int (*activate)(void *ctx);

int (*deactivate)(void *ctx);

const char* (*get_provider_name)(void *ctx);

int (*add_random)(void *ctx, void *buffer, int length);

int (*random)(void *ctx, void *buffer, int length);

int (*hmac)(void *ctx, int algorithm, unsigned char *hmac_key, int key_sz, unsigned char *in, int in_sz, unsigned char *in2, int in2_sz, unsigned char *out);

int (*kdf)(void *ctx, int algorithm, const unsigned char *pass, int pass_sz, unsigned char* salt, int salt_sz, int workfactor, int key_sz, unsigned char *key);

int (*cipher)(void *ctx, int mode, unsigned char *key, int key_sz, unsigned char *iv, unsigned char *in, int in_sz, unsigned char *out);

const char* (*get_cipher)(void *ctx);

int (*get_key_sz)(void *ctx);

int (*get_iv_sz)(void *ctx);

int (*get_block_sz)(void *ctx);

int (*get_hmac_sz)(void *ctx, int algorithm);

int (*ctx_copy)(void *target_ctx, void *source_ctx);

int (*ctx_cmp)(void *c1, void *c2);

int (*ctx_init)(void **ctx);

int (*ctx_free)(void **ctx);

int (*fips_status)(void *ctx);

const char* (*get_provider_version)(void *ctx);

} sqlcipher_provider;

/* utility functions */

void sqlcipher_free(void *, int);

void* sqlcipher_malloc(int);

void sqlcipher_mlock(void *, int);

void sqlcipher_munlock(void *, int);

void* sqlcipher_memset(void *, unsigned char, int);

int sqlcipher_ismemset(const void *, unsigned char, int);

int sqlcipher_memcmp(const void *, const void *, int);

void sqlcipher_free(void *, int);

/* provider interfaces */

int sqlcipher_register_provider(sqlcipher_provider *);

sqlcipher_provider* sqlcipher_get_provider(void);

#endif

#endif

/* END SQLCIPHER */