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+/* 
+** 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
+
+
+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, 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, const 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);
+  int (*set_cipher)(void *ctx, const char *cipher_name);
+  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 (*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);
+} sqlcipher_provider;
+
+/* utility functions */
+void sqlcipher_free(void *ptr, int sz);
+void* sqlcipher_malloc(int sz);
+void* sqlcipher_memset(void *v, unsigned char value, int len);
+int sqlcipher_ismemset(const void *v, unsigned char value, int len);
+int sqlcipher_memcmp(const void *v0, const void *v1, int len);
+void sqlcipher_free(void *, int);
+
+/* provider interfaces */
+int sqlcipher_register_provider(sqlcipher_provider *p);
+sqlcipher_provider* sqlcipher_get_provider();
+
+#endif
+#endif
+/* END SQLCIPHER */
+