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+/*
+ * ---------------------------------------------------------------------------
+ * OpenAES License
+ * ---------------------------------------------------------------------------
+ * Copyright (c) 2013, Nabil S. Al Ramli, www.nalramli.com
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR 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 _OAES_LIB_H
+#define _OAES_LIB_H
+
+#include "oaes_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef _WIN32
+# ifdef OAES_SHARED
+# ifdef oaes_lib_EXPORTS
+# define OAES_API __declspec(dllexport)
+# else
+# define OAES_API __declspec(dllimport)
+# endif
+# else
+# define OAES_API
+# endif
+#else
+# define OAES_API
+#endif // WIN32
+
+#define OAES_BLOCK_SIZE 16
+
+typedef void OAES_CTX;
+
+/*
+ * oaes_set_option() takes one of these values for its [option] parameter
+ * some options accept either an optional or a required [value] parameter
+ */
+// no option
+#define OAES_OPTION_NONE 0
+// enable ECB mode, disable CBC mode
+#define OAES_OPTION_ECB 1
+// enable CBC mode, disable ECB mode
+// value is optional, may pass uint8_t iv[OAES_BLOCK_SIZE] to specify
+// the value of the initialization vector, iv
+#define OAES_OPTION_CBC 2
+
+#ifdef OAES_DEBUG
+typedef int ( * oaes_step_cb ) (
+ const uint8_t state[OAES_BLOCK_SIZE],
+ const char * step_name,
+ int step_count,
+ void * user_data );
+// enable state stepping mode
+// value is required, must pass oaes_step_cb to receive the state at each step
+#define OAES_OPTION_STEP_ON 4
+// disable state stepping mode
+#define OAES_OPTION_STEP_OFF 8
+#endif // OAES_DEBUG
+
+typedef uint16_t OAES_OPTION;
+
+/*
+ * // usage:
+ *
+ * OAES_CTX * ctx = oaes_alloc();
+ * .
+ * .
+ * .
+ * {
+ * oaes_gen_key_xxx( ctx );
+ * {
+ * oaes_key_export( ctx, _buf, &_buf_len );
+ * // or
+ * oaes_key_export_data( ctx, _buf, &_buf_len );\
+ * }
+ * }
+ * // or
+ * {
+ * oaes_key_import( ctx, _buf, _buf_len );
+ * // or
+ * oaes_key_import_data( ctx, _buf, _buf_len );
+ * }
+ * .
+ * .
+ * .
+ * oaes_encrypt( ctx, m, m_len, c, &c_len );
+ * .
+ * .
+ * .
+ * oaes_decrypt( ctx, c, c_len, m, &m_len );
+ * .
+ * .
+ * .
+ * oaes_free( &ctx );
+ */
+
+OAES_API OAES_CTX * oaes_alloc();
+
+OAES_API OAES_RET oaes_free( OAES_CTX ** ctx );
+
+OAES_API OAES_RET oaes_set_option( OAES_CTX * ctx,
+ OAES_OPTION option, const void * value );
+
+OAES_API OAES_RET oaes_key_gen_128( OAES_CTX * ctx );
+
+OAES_API OAES_RET oaes_key_gen_192( OAES_CTX * ctx );
+
+OAES_API OAES_RET oaes_key_gen_256( OAES_CTX * ctx );
+
+// export key with header information
+// set data == NULL to get the required data_len
+OAES_API OAES_RET oaes_key_export( OAES_CTX * ctx,
+ uint8_t * data, size_t * data_len );
+
+// directly export the data from key
+// set data == NULL to get the required data_len
+OAES_API OAES_RET oaes_key_export_data( OAES_CTX * ctx,
+ uint8_t * data, size_t * data_len );
+
+// import key with header information
+OAES_API OAES_RET oaes_key_import( OAES_CTX * ctx,
+ const uint8_t * data, size_t data_len );
+
+// directly import data into key
+OAES_API OAES_RET oaes_key_import_data( OAES_CTX * ctx,
+ const uint8_t * data, size_t data_len );
+
+// set c == NULL to get the required c_len
+OAES_API OAES_RET oaes_encrypt( OAES_CTX * ctx,
+ const uint8_t * m, size_t m_len, uint8_t * c, size_t * c_len );
+
+// set m == NULL to get the required m_len
+OAES_API OAES_RET oaes_decrypt( OAES_CTX * ctx,
+ const uint8_t * c, size_t c_len, uint8_t * m, size_t * m_len );
+
+// set buf == NULL to get the required buf_len
+OAES_API OAES_RET oaes_sprintf(
+ char * buf, size_t * buf_len, const uint8_t * data, size_t data_len );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _OAES_LIB_H