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/**

* @file Hash.cpp

* @date 20.05.2015

* @author Markus Sattler

*

* Copyright (c) 2015 Markus Sattler. All rights reserved.

* This file is part of the esp8266 core for Arduino environment.

*

* This library 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 2.1 of the License, or (at your option) any later version.

*

* This library 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

* Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public

* License along with this library; if not, write to the Free Software

* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

*

*/

#include <Arduino.h>

#include "Hash.h"

extern "C" {

#include "sha1/sha1.h"

}

/**

* create a sha1 hash from data

* @param data uint8_t *

* @param size uint32_t

* @param hash uint8_t[20]

*/

void sha1(uint8_t * data, uint32_t size, uint8_t hash[20]) {

SHA1_CTX ctx;

#ifdef DEBUG_SHA1

os_printf("DATA:");

for(uint16_t i = 0; i < size; i++) {

os_printf("%02X", data[i]);

}

os_printf("\n");

os_printf("DATA:");

for(uint16_t i = 0; i < size; i++) {

os_printf("%c", data[i]);

}

os_printf("\n");

#endif

SHA1Init(&ctx);

SHA1Update(&ctx, data, size);

SHA1Final(hash, &ctx);

#ifdef DEBUG_SHA1

os_printf("SHA1:");

for(uint16_t i = 0; i < 20; i++) {

os_printf("%02X", hash[i]);

}

os_printf("\n\n");

#endif

}

void sha1(char * data, uint32_t size, uint8_t hash[20]) {

sha1((uint8_t *) data, size, hash);

}

void sha1(const uint8_t * data, uint32_t size, uint8_t hash[20]) {

sha1((uint8_t *) data, size, hash);

}

void sha1(const char * data, uint32_t size, uint8_t hash[20]) {

sha1((uint8_t *) data, size, hash);

}

void sha1(String data, uint8_t hash[20]) {

sha1(data.c_str(), data.length(), hash);

}

String sha1(uint8_t* data, uint32_t size) {

uint8_t hash[20];

String hashStr = "";

sha1(&data[0], size, &hash[0]);

for(uint16_t i = 0; i < 20; i++) {

String hex = String(hash[i], HEX);

if(hex.length() < 2) {

hex = "0" + hex;

}

hashStr += hex;

}

return hashStr;

}

String sha1(char* data, uint32_t size) {

return sha1((uint8_t*) data, size);

}

String sha1(const uint8_t* data, uint32_t size) {

return sha1((uint8_t*) data, size);

}

String sha1(const char* data, uint32_t size) {

return sha1((uint8_t*) data, size);

}

String sha1(String data) {

return sha1(data.c_str(), data.length());

}