/*
 * Copyright (C) 2017, University of the Basque Country (UPV/EHU)
 * Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
 *
 * The original file was part of Open Source Doubango Framework
 * Copyright (C) 2010-2011 Mamadou Diop.
 * Copyright (C) 2012 Doubango Telecom <http://doubango.org>
 *
 * This file is part of Open Source Doubango Framework.
 *
 * DOUBANGO is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DOUBANGO is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DOUBANGO.
 *
 */
 
 /**@file tsk_sha1.h
  * @brief US Secure Hash Algorithm 1 (RFC 3174)
  *
  * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
  *
 
  */
 #ifndef _TINYSAK_SHA1_H_
 #define _TINYSAK_SHA1_H_
 
 #include "tinysak_config.h"
 
 TSK_BEGIN_DECLS
 
 /**@ingroup tsk_sha1_group
 * SHA-1 error codes.
 */
 typedef enum tsk_sha1_errcode_e
 {
     shaSuccess = 0,		/**< Success */
     shaNull,            /**< Null pointer parameter */
     shaInputTooLong,    /**< input data too long */
     shaStateError       /**< called Input after Result */
 }
 tsk_sha1_errcode_t;
 
 /**@ingroup tsk_sha1_group
 *@def TSK_SHA1_DIGEST_SIZE
 */
 /**@ingroup tsk_sha1_group
 *@def TSK_SHA1_BLOCK_SIZE
 */
 /**@ingroup tsk_sha1_group
 *@def TSK_SHA1_STRING_SIZE
 */
 /**@ingroup tsk_sha1_group
 *@def tsk_sha1string_t
 * Hexadecimal SHA-1 digest string.
 */
 /**@ingroup tsk_sha1_group
 *@def tsk_sha1digest_t
 * SHA-1 digest bytes.
 */
 
 #define TSK_SHA1_DIGEST_SIZE			20
 #define TSK_SHA1_BLOCK_SIZE				64
 
 #define TSK_SHA1_STRING_SIZE		(TSK_SHA1_DIGEST_SIZE*2)
 typedef uint8_t tsk_sha1string_t[TSK_SHA1_STRING_SIZE+1];
 typedef uint8_t tsk_sha1digest_t[TSK_SHA1_DIGEST_SIZE]; /**< SHA-1 digest bytes. */
 
 /**@ingroup tsk_sha1_group
 * Computes SHA-1 digest.
 * @param input The input data.
 * @param input_size The size of the input data.
 * @param digest @ref tsk_sha1digest_t object conaining the sha1 digest result.
 * @sa @ref tsk_sha1compute.
 */
 #define TSK_SHA1_DIGEST_CALC(input, input_size, digest)			\
 			{													\
 				tsk_sha1context_t ctx;							\
 				tsk_sha1reset(&ctx);							\
 				tsk_sha1input(&ctx, (input), (input_size));		\
 				tsk_sha1result(&ctx, (digest));					\
 			}
 
 /**@ingroup tsk_sha1_group
  *  This structure will hold context information for the SHA-1
  *  hashing SSESSION
  */
 typedef struct tsk_sha1context_s
 {
     uint32_t Intermediate_Hash[TSK_SHA1_DIGEST_SIZE/4]; /* Message Digest  */
 
     uint32_t Length_Low;            /**< Message length in bits      */
     uint32_t Length_High;           /**< Message length in bits      */
 
                                
     int_least16_t Message_Block_Index;/**< Index into message block array   */
     uint8_t Message_Block[64];      /**< 512-bit message blocks      */
 
     int32_t Computed;               /**< Is the digest computed?         */
     int32_t Corrupted;             /**< Is the message digest corrupted? */
 } 
 tsk_sha1context_t;
 
 /*
  *  Function Prototypes
  */
 
 TINYSAK_API tsk_sha1_errcode_t tsk_sha1reset(tsk_sha1context_t *);
 TINYSAK_API tsk_sha1_errcode_t tsk_sha1input(tsk_sha1context_t *, const uint8_t *, unsigned length);
 TINYSAK_API tsk_sha1_errcode_t tsk_sha1result(tsk_sha1context_t *, tsk_sha1digest_t Message_Digest);
 TINYSAK_API void tsk_sha1final(uint8_t *Message_Digest, tsk_sha1context_t *context);
 TINYSAK_API tsk_sha1_errcode_t tsk_sha1compute(const char* input, tsk_size_t size, tsk_sha1string_t *result);
 
 TSK_END_DECLS
 
 #endif /* _TINYSAK_SHA1_H_ */