/*

 * SHA1 context functions

 *

 * Copyright (C) 2011-2024, Joachim Metz <joachim.metz@gmail.com>

 *

 * Refer to AUTHORS for acknowledgements.

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program 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 Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */

#include <common.h>

#include <byte_stream.h>

#include <memory.h>

#include <types.h>

#if defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_SHA_H )

#include <openssl/sha.h>

#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H )

#include <openssl/err.h>

#include <openssl/evp.h>

#endif

#include "libhmac_byte_stream.h"

#include "libhmac_definitions.h"

#include "libhmac_libcerror.h"

#include "libhmac_sha1_context.h"

#if !defined( LIBHMAC_HAVE_SHA1_SUPPORT )

/* RFC 3174/FIPS 180-1 based SHA-1 functions

 */

/* TODO decription what these values are based on

 */

uint32_t libhmac_sha1_context_fixed_constants[ 5 ] = {

  0x67452301UL, 0xefcdab89UL, 0x98badcfeUL, 0x10325476UL, 0xc3d2e1f0UL

};

#define libhmac_sha1_context_transform_extend_32bit_value( values_32bit, value_32bit_index ) \

  values_32bit[ value_32bit_index ] = values_32bit[ value_32bit_index - 3 ] \

                                    ^ values_32bit[ value_32bit_index - 8 ] \

                                    ^ values_32bit[ value_32bit_index - 14 ] \

                                    ^ values_32bit[ value_32bit_index - 16 ]; \

  values_32bit[ value_32bit_index ] = byte_stream_bit_rotate_left_32bit( \

                                       values_32bit[ value_32bit_index ], \

                                       1 );

#define libhmac_sha1_context_transform_unfolded_extend_32bit_values( values_32bit ) \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 16 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 17 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 18 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 19 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 20 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 21 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 22 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 23 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 24 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 25 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 26 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 27 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 28 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 29 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 30 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 31 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 32 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 33 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 34 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 35 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 36 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 37 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 38 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 39 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 40 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 41 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 42 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 43 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 44 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 45 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 46 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 47 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 48 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 49 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 50 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 51 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 52 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 53 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 54 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 55 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 56 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 57 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 58 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 59 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 60 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 61 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 62 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 63 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 64 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 65 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 66 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 67 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 68 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 69 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 70 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 71 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 72 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 73 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 74 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 75 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 76 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 77 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 78 ); \

  libhmac_sha1_context_transform_extend_32bit_value( values_32bit, 79 );

#define libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, value_32bit_index, hash_values, hash_value_index0, hash_value_index1, hash_value_index2, hash_value_index3, hash_value_index4 ) \

  hash_values[ hash_value_index4 ] += ( hash_values[ hash_value_index1 ] & hash_values[ hash_value_index2 ] ) \

                                    | ( ~( hash_values[ hash_value_index1 ] ) & hash_values[ hash_value_index3 ] ); \

  hash_values[ hash_value_index4 ] += 0x5a827999UL; \

  hash_values[ hash_value_index4 ] += byte_stream_bit_rotate_left_32bit( \

                                       hash_values[ hash_value_index0 ], \

                                       5 ); \

  hash_values[ hash_value_index4 ] += values_32bit[ value_32bit_index ]; \

\

  hash_values[ hash_value_index1 ] = byte_stream_bit_rotate_left_32bit( \

                                      hash_values[ hash_value_index1 ], \

                          30 );

#define libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, value_32bit_index, hash_values, hash_value_index0, hash_value_index1, hash_value_index2, hash_value_index3, hash_value_index4 ) \

  hash_values[ hash_value_index4 ] += hash_values[ hash_value_index1 ] \

                                    ^ hash_values[ hash_value_index2 ] \

                                    ^ hash_values[ hash_value_index3 ]; \

  hash_values[ hash_value_index4 ] += 0x6ed9eba1UL; \

  hash_values[ hash_value_index4 ] += byte_stream_bit_rotate_left_32bit( \

                                       hash_values[ hash_value_index0 ], \

                                       5 ); \

  hash_values[ hash_value_index4 ] += values_32bit[ value_32bit_index ]; \

\

  hash_values[ hash_value_index1 ] = byte_stream_bit_rotate_left_32bit( \

                                      hash_values[ hash_value_index1 ], \

                          30 );

#define libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, value_32bit_index, hash_values, hash_value_index0, hash_value_index1, hash_value_index2, hash_value_index3, hash_value_index4 ) \

  hash_values[ hash_value_index4 ] += ( hash_values[ hash_value_index1 ] & hash_values[ hash_value_index2 ] ) \

                                    | ( hash_values[ hash_value_index1 ] & hash_values[ hash_value_index3 ] ) \

                                    | ( hash_values[ hash_value_index2 ] & hash_values[ hash_value_index3 ] ); \

  hash_values[ hash_value_index4 ] += 0x8f1bbcdcUL; \

  hash_values[ hash_value_index4 ] += byte_stream_bit_rotate_left_32bit( \

                                       hash_values[ hash_value_index0 ], \

                                       5 ); \

  hash_values[ hash_value_index4 ] += values_32bit[ value_32bit_index ]; \

\

  hash_values[ hash_value_index1 ] = byte_stream_bit_rotate_left_32bit( \

                                      hash_values[ hash_value_index1 ], \

                          30 );

#define libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, value_32bit_index, hash_values, hash_value_index0, hash_value_index1, hash_value_index2, hash_value_index3, hash_value_index4 ) \

  hash_values[ hash_value_index4 ] += hash_values[ hash_value_index1 ] \

                                    ^ hash_values[ hash_value_index2 ] \

                                    ^ hash_values[ hash_value_index3 ]; \

  hash_values[ hash_value_index4 ] += 0xca62c1d6UL; \

  hash_values[ hash_value_index4 ] += byte_stream_bit_rotate_left_32bit( \

                                       hash_values[ hash_value_index0 ], \

                                       5 ); \

  hash_values[ hash_value_index4 ] += values_32bit[ value_32bit_index ]; \

\

  hash_values[ hash_value_index1 ] = byte_stream_bit_rotate_left_32bit( \

                                      hash_values[ hash_value_index1 ], \

                          30 );

#define libhmac_sha1_context_transform_unfolded_calculate_hash_values( values_32bit, hash_values ) \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 0, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 1, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 2, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 3, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 4, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 5, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 6, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 7, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 8, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 9, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 10, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 11, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 12, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 13, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 14, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 15, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 16, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 17, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 18, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round1( values_32bit, 19, hash_values, 1, 2, 3, 4, 0 ); \

\

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 20, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 21, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 22, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 23, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 24, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 25, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 26, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 27, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 28, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 29, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 30, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 31, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 32, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 33, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 34, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 35, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 36, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 37, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 38, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round2( values_32bit, 39, hash_values, 1, 2, 3, 4, 0 ); \

\

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 40, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 41, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 42, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 43, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 44, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 45, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 46, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 47, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 48, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 49, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 50, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 51, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 52, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 53, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 54, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 55, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 56, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 57, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 58, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round3( values_32bit, 59, hash_values, 1, 2, 3, 4, 0 ); \

\

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 60, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 61, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 62, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 63, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 64, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 65, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 66, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 67, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 68, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 69, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 70, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 71, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 72, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 73, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 74, hash_values, 1, 2, 3, 4, 0 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 75, hash_values, 0, 1, 2, 3, 4 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 76, hash_values, 4, 0, 1, 2, 3 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 77, hash_values, 3 ,4, 0, 1, 2 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 78, hash_values, 2, 3, 4, 0, 1 ); \

        libhmac_sha1_context_transform_unfolded_calculate_hash_value_round4( values_32bit, 79, hash_values, 1, 2, 3, 4, 0 );

/* Calculates the SHA1 of 64 byte sized blocks of data in a buffer

 * Returns the number of bytes used if successful or -1 on error

 */

ssize_t libhmac_sha1_context_transform(

         libhmac_internal_sha1_context_t *internal_context,

         const uint8_t *buffer,

         size_t size,

         libcerror_error_t **error )

{

  uint32_t hash_values[ 5 ];

  uint32_t values_32bit[ 80 ];

  static char *function     = "libhmac_sha1_context_transform";

  size_t buffer_offset      = 0;

#if !defined( LIBHMAC_UNFOLLED_LOOPS )

  uint32_t hash_value       = 0;

  uint8_t hash_values_index = 0;

  uint8_t value_32bit_index = 0;

#endif

  if( internal_context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid internal context.",

     function );

    return( -1 );

  }

  if( buffer == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid buffer.",

     function );

    return( -1 );

  }

  if( size > (size_t) SSIZE_MAX )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,

     "%s: invalid size value exceeds maximum.",

     function );

    return( -1 );

  }

  while( size >= LIBHMAC_SHA1_BLOCK_SIZE )

  {

    if( memory_copy(

         hash_values,

         internal_context->hash_values,

         sizeof( uint32_t ) * 5 ) == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_MEMORY,

       LIBCERROR_MEMORY_ERROR_COPY_FAILED,

       "%s: unable to copy hash values.",

       function );

      goto on_error;

    }

#if defined( LIBHMAC_UNFOLLED_LOOPS )

    /* Break the block into 16 x 32-bit values

     */

    libhmac_byte_stream_copy_to_16x_uint32_big_endian(

     &( buffer[ buffer_offset ] ),

     values_32bit );

    buffer_offset += LIBHMAC_SHA1_BLOCK_SIZE;

    /* Extend to 80 x 32-bit values

     */

    libhmac_sha1_context_transform_unfolded_extend_32bit_values(

     values_32bit );

    /* Calculate the hash values for the 32-bit values

     */

    libhmac_sha1_context_transform_unfolded_calculate_hash_values(

     values_32bit,

     hash_values );

    /* Update the hash values in the context

     */

    internal_context->hash_values[ 0 ] += hash_values[ 0 ];

    internal_context->hash_values[ 1 ] += hash_values[ 1 ];

    internal_context->hash_values[ 2 ] += hash_values[ 2 ];

    internal_context->hash_values[ 3 ] += hash_values[ 3 ];

    internal_context->hash_values[ 4 ] += hash_values[ 4 ];

#else

    /* Break the block into 16 x 32-bit values

     */

    for( value_32bit_index = 0;

         value_32bit_index < 16;

         value_32bit_index++ )

    {

      byte_stream_copy_to_uint32_big_endian(

       &( buffer[ buffer_offset ] ),

       values_32bit[ value_32bit_index ] );

      buffer_offset += sizeof( uint32_t );

    }

    /* Extend to 80 x 32-bit values

     */

    for( value_32bit_index = 16;

         value_32bit_index < 80;

         value_32bit_index++ )

    {

      libhmac_sha1_context_transform_extend_32bit_value(

       values_32bit,

       value_32bit_index );

    }

    /* Calculate the hash values for the 32-bit values

     */

    for( value_32bit_index = 0;

         value_32bit_index < 80;

         value_32bit_index++ )

    {

      if( value_32bit_index < 20 )

      {

        hash_values[ 4 ] += ( hash_values[ 1 ] & hash_values[ 2 ] )

                          | ( ~( hash_values[ 1 ] ) & hash_values[ 3 ] );

        hash_values[ 4 ] += 0x5a827999UL;

      }

      else if( value_32bit_index < 40 )

      {

        hash_values[ 4 ] += hash_values[ 1 ]

                          ^ hash_values[ 2 ]

                          ^ hash_values[ 3 ];

        hash_values[ 4 ] += 0x6ed9eba1UL;

      }

      else if( value_32bit_index < 60 )

      {

        hash_values[ 4 ] += ( hash_values[ 1 ] & hash_values[ 2 ] )

                          | ( hash_values[ 1 ] & hash_values[ 3 ] )

                          | ( hash_values[ 2 ] & hash_values[ 3 ] );

        hash_values[ 4 ] += 0x8f1bbcdcUL;

      }

      else

      {

        hash_values[ 4 ] += hash_values[ 1 ]

                          ^ hash_values[ 2 ]

                          ^ hash_values[ 3 ];

        hash_values[ 4 ] += 0xca62c1d6UL;

      }

      hash_values[ 4 ] += byte_stream_bit_rotate_left_32bit(

                           hash_values[ 0 ],

                           5 );

      hash_values[ 4 ] += values_32bit[ value_32bit_index ];

      hash_value       = hash_values[ 4 ];

      hash_values[ 4 ] = hash_values[ 3 ];

      hash_values[ 3 ] = hash_values[ 2 ];

      hash_values[ 2 ] = byte_stream_bit_rotate_left_32bit(

                          hash_values[ 1 ],

                          30 );

      hash_values[ 1 ] = hash_values[ 0 ];

      hash_values[ 0 ] = hash_value;

    }

    /* Update the hash values in the context

     */

    for( hash_values_index = 0;

         hash_values_index < 5;

         hash_values_index++ )

    {

      internal_context->hash_values[ hash_values_index ] += hash_values[ hash_values_index ];

    }

#endif /* defined( LIBHMAC_UNFOLLED_LOOPS ) */

    size -= LIBHMAC_SHA1_BLOCK_SIZE;

  }

  /* Prevent sensitive data from leaking

   */

  if( memory_set(

       hash_values,

       0,

       sizeof( uint32_t ) * 5 ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear hash values.",

     function );

    goto on_error;

  }

  if( memory_set(

       values_32bit,

       0,

       sizeof( uint32_t ) * 16 ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear 32-bit values.",

     function );

    goto on_error;

  }

  return( (ssize_t) buffer_offset );

on_error:

  memory_set(

   values_32bit,

   0,

   sizeof( uint32_t ) * 64 );

  memory_set(

   hash_values,

   0,

   sizeof( uint32_t ) * 5 );

  return( -1 );

}

#endif /* !defined( LIBHMAC_HAVE_SHA1_SUPPORT ) */

/* Creates a SHA1 context

 * Make sure the value context is referencing, is set to NULL

 * Returns 1 if successful or -1 on error

 */

int libhmac_sha1_context_initialize(

     libhmac_sha1_context_t **context,

     libcerror_error_t **error )

{

  libhmac_internal_sha1_context_t *internal_context = NULL;

  static char *function                             = "libhmac_sha1_context_initialize";

#if defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H ) && defined( HAVE_EVP_SHA1 )

  const EVP_MD *evp_md_type                         = NULL;

#endif

  if( context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid context.",

     function );

    return( -1 );

  }

  if( *context != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid context value already set.",

     function );

    return( -1 );

  }

  internal_context = memory_allocate_structure(

                      libhmac_internal_sha1_context_t );

  if( internal_context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create context.",

     function );

    goto on_error;

  }

  if( memory_set(

       internal_context,

       0,

       sizeof( libhmac_internal_sha1_context_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear context.",

     function );

    memory_free(

     internal_context );

    return( -1 );

  }

#if defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_SHA_H ) && defined( SHA_DIGEST_LENGTH )

  if( SHA1_Init(

       &( internal_context->sha1_context ) ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to initialize context.",

     function );

    goto on_error;

  }

#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H ) && defined( HAVE_EVP_SHA1 )

#if defined( HAVE_EVP_MD_CTX_INIT )

  EVP_MD_CTX_init(

   &( internal_context->internal_evp_md_context ) );

  internal_context->evp_md_context = &( internal_context->internal_evp_md_context );

#else

  internal_context->evp_md_context = EVP_MD_CTX_new();

  if( internal_context->evp_md_context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create EVP message digest context.",

     function );

    goto on_error;

  }

#endif /* defined( HAVE_EVP_MD_CTX_INIT ) */

/* TODO use EVP_MD_fetch for EVP_DigestInit_ex2 */

  evp_md_type = EVP_sha1();

#if defined( HAVE_EVP_DIGESTINIT_EX2 )

  if( EVP_DigestInit_ex2(

       internal_context->evp_md_context,

       evp_md_type,

       NULL ) != 1 )

#else

  if( EVP_DigestInit_ex(

       internal_context->evp_md_context,

       evp_md_type,

       NULL ) != 1 )

#endif

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to initialize context.",

     function );

#if defined( HAVE_EVP_MD_CTX_CLEANUP )

    EVP_MD_CTX_cleanup(

     &( internal_context->internal_evp_md_context ) );

    ERR_remove_thread_state(

     NULL );

#else

    EVP_MD_CTX_free(

     internal_context->evp_md_context );

#endif

    internal_context->evp_md_context = NULL;

    goto on_error;

  }

#else

  if( memory_copy(

       internal_context->hash_values,

       libhmac_sha1_context_fixed_constants,

       sizeof( uint32_t ) * 5 ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_COPY_FAILED,

     "%s: unable to copy fixed constants to hash values.",

     function );

    goto on_error;

  }

#endif /* defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_SHA_H ) && defined( SHA_DIGEST_LENGTH ) */

  *context = (libhmac_sha1_context_t *) internal_context;

  return( 1 );

on_error:

  if( internal_context != NULL )

  {

    memory_free(

     internal_context );

  }

  return( -1 );

}

/* Frees a SHA1 context

 * Returns 1 if successful or -1 on error

 */

int libhmac_sha1_context_free(

     libhmac_sha1_context_t **context,

     libcerror_error_t **error )

{

  libhmac_internal_sha1_context_t *internal_context = NULL;

  static char *function                             = "libhmac_sha1_context_free";

  if( context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid context.",

     function );

    return( -1 );

  }

  if( *context != NULL )

  {

    internal_context = (libhmac_internal_sha1_context_t *) *context;

    *context         = NULL;

#if defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_SHA_H ) && defined( SHA_DIGEST_LENGTH )

    /* No additional clean up necessary

     */

#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H ) && defined( HAVE_EVP_SHA1 )

#if defined( HAVE_EVP_MD_CTX_CLEANUP )

    if( EVP_MD_CTX_cleanup(

         &( internal_context->internal_evp_md_context ) ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to clean up EVP message digest context.",

       function );

    }

    /* Make sure the error state is removed otherwise OpenSSL will leak memory

     */

    ERR_remove_thread_state(

     NULL );

#else

    EVP_MD_CTX_free(

     internal_context->evp_md_context );

#endif /* defined( HAVE_EVP_MD_CTX_CLEANUP ) */

    internal_context->evp_md_context = NULL;

#else

    /* No additional clean up necessary

     */

#endif /* defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_SHA_H ) && defined( SHA_DIGEST_LENGTH ) */

    memory_free(

     internal_context );

  }

  return( 1 );

}

#if defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_SHA_H ) && defined( SHA_DIGEST_LENGTH )

/* Updates the SHA1 context using OpenSSL

 * Returns 1 if successful or -1 on error

 */

int libhmac_sha1_context_update(

     libhmac_sha1_context_t *context,

     const uint8_t *buffer,

     size_t size,

     libcerror_error_t **error )

{

  libhmac_internal_sha1_context_t *internal_context = NULL;

  static char *function                             = "libhmac_sha1_context_update";

  unsigned long safe_hash_size                      = 0;

  if( context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid context.",

     function );

    return( -1 );

  }

  internal_context = (libhmac_internal_sha1_context_t *) context;

  if( buffer == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid buffer.",

     function );

    return( -1 );

  }

#if ( SIZEOF_LONG < SIZEOF_SIZE_T )

  if( size > (size_t) ULONG_MAX )

#else

  if( size > (size_t) SSIZE_MAX )

#endif

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,

     "%s: invalid size value exceeds maximum.",

     function );

    return( -1 );

  }

  if( size == 0 )

  {

    return( 1 );

  }

  safe_hash_size = (unsigned long) size;

  if( SHA1_Update(

       &( internal_context->sha1_context ),

       (const void *) buffer,

       size ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to update context.",

     function );

    return( -1 );

  }

  return( 1 );

}

#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H ) && defined( HAVE_EVP_SHA1 )

/* Updates the SHA1 context using OpenSSL EVP

 * Returns 1 if successful or -1 on error

 */

int libhmac_sha1_context_update(

     libhmac_sha1_context_t *context,

     const uint8_t *buffer,

     size_t size,

     libcerror_error_t **error )

{

  libhmac_internal_sha1_context_t *internal_context = NULL;

  static char *function                             = "libhmac_sha1_context_update";

  if( context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid context.",

     function );

    return( -1 );

  }

  internal_context = (libhmac_internal_sha1_context_t *) context;

  if( buffer == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid buffer.",

     function );

    return( -1 );

  }

  if( size > (size_t) SSIZE_MAX )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,

     "%s: invalid size value exceeds maximum.",

     function );

    return( -1 );

  }

  if( size == 0 )

  {

    return( 1 );

  }

  if( EVP_DigestUpdate(

       internal_context->evp_md_context,

       (const void *) buffer,

       size ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to update context.",

     function );

    return( -1 );

  }

  return( 1 );

}

#else

/* Updates the SHA1 context using fallback implementation

 * Returns 1 if successful or -1 on error

 */

int libhmac_sha1_context_update(

     libhmac_sha1_context_t *context,

     const uint8_t *buffer,

     size_t size,

     libcerror_error_t **error )

{

  libhmac_internal_sha1_context_t *internal_context = NULL;

  static char *function                             = "libhmac_sha1_context_update";

  size_t buffer_offset                              = 0;

  size_t remaining_block_size                       = 0;

  ssize_t process_count                             = 0;

  if( context == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid context.",

     function );

    return( -1 );

  }

  internal_context = (libhmac_internal_sha1_context_t *) context;

  if( buffer == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid buffer.",

     function );

    return( -1 );

  }

  if( size > (size_t) SSIZE_MAX )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,

     "%s: invalid size value exceeds maximum.",

     function );

    return( -1 );

  }

  if( size == 0 )

  {

    return( 1 );

  }

  if( internal_context->block_offset > 0 )

  {

    if( internal_context->block_offset >= LIBHMAC_SHA1_BLOCK_SIZE )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid context - block offset value out of bounds.",

       function );

      return( -1 );

    }

    remaining_block_size = LIBHMAC_SHA1_BLOCK_SIZE - internal_context->block_offset;

    if( remaining_block_size > size )

    {

      remaining_block_size = size;

    }

    if( memory_copy(

         &( internal_context->block[ internal_context->block_offset ] ),

         buffer,

         remaining_block_size ) == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_MEMORY,

       LIBCERROR_MEMORY_ERROR_COPY_FAILED,

       "%s: unable to copy data to context block.",

       function );

      return( -1 );

    }

    internal_context->block_offset += remaining_block_size;

    if( internal_context->block_offset < LIBHMAC_SHA1_BLOCK_SIZE )

    {

      return( 1 );

    }

    buffer_offset += remaining_block_size;

    size          -= remaining_block_size;

    process_count = libhmac_sha1_context_transform(

                     internal_context,

                     internal_context->block,

                     LIBHMAC_SHA1_BLOCK_SIZE,

                     error );

    if( process_count == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_SET_FAILED,

       "%s: unable to transform context block.",

       function );

      return( -1 );

    }

    internal_context->hash_count  += process_count;

    internal_context->block_offset = 0;

  }

  if( size > 0 )

  {

    process_count = libhmac_sha1_context_transform(

                     internal_context,

                     &( buffer[ buffer_offset ] ),

                     size,

                     error );

    if( process_count == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_SET_FAILED,

       "%s: unable to transform buffer.",

       function );

      return( -1 );

    }

    internal_context->hash_count += process_count;

    buffer_offset += process_count;

    size          -= process_count;

  }

  if( size > 0 )

  {

    if( size >= LIBHMAC_SHA1_BLOCK_SIZE )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid size value out of bounds.",