151 lines
6.3 KiB
C++
151 lines
6.3 KiB
C++
/*
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* Chiper.h
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*
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* Created on: Feb 28, 2019
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* Author: joseph
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*/
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#ifndef CIPHER_H_
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#define CIPHER_H_
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#include "mbedtls/aes.h"
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#include <Arduino.h>
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//#include <WString.h>
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class Cipher {
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public:
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/** Default constructor, privateChiperKey property will be set on a default, unsecure value
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*
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* @param ---
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* @return ---
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*/
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Cipher();
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/** Overloaded constructor, privateChiperKey will be set on @param key
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*
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* @param key secure key as pointer on char array
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* @return ---
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*/
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Cipher(char * key);
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/** Default destructor, privateChiperKey will deleted
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*
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* @param ---
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* @return ---
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*/
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virtual ~Cipher();
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/** Set privateChiperKey on given @param key
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*
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* @param key secure key as pointer on char array
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* @return ---
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*/
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void setKey(char * key);
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/** Returns the privateCipherKey
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*
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* @param ---
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* @return secure key as pointer on char array
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*/
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char * getKey();
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/** Encrypt (AES-128bit ECB encryption mode) the @param plainText char array with given key and store the output in @return outputBuffer
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*
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* @param plainText buffer of length 16 characters
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* @param key secure key as pointer on char array, function call getKey() is possible, instead of using the second function encrypt()
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* @return outputBuffer buffer of length 16 characters filled with the encryption result
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*/
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void encrypt(char * plainText, char * key, unsigned char * outputBuffer);
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/** Encrypt (AES-128bit ECB encryption mode) the @param plainText char array with @property privateCipherKey and store the output in @return outputBuffer
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*
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* @param plainText buffer of length 16 characters
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* @return outputBuffer buffer of length 16 characters filled with the encryption result
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*/
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void encrypt(char * plainText, unsigned char * outputBuffer);
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/** Decrypt (AES-128bit ECB decryption mode) the @param cipherText char array with given key and store the output in @return outputBuffer
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*
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* @param cipherText buffer of length 16 characters
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* @param key secure key as pointer on char array, function call getKey() is possible, instead of using the second function decrypt()
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* @return outputBuffer buffer of length 16 characters filled with the decryption result
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*/
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void decrypt(unsigned char * cipherText, char * key, unsigned char * outputBuffer);
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/** Decrypt (AES-128bit ECB decryption mode) the @param cipherText char array with @property privateCipherKey and store the output in @return outputBuffer
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*
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* @param cipherText buffer of length 16 characters
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* @return outputBuffer buffer of length 16 characters filled with the decryption result
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*/
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void decrypt(unsigned char * cipherText, unsigned char * outputBuffer);
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/** Encrypt (AES-128bit ECB encryption mode) the @param plainText char array buffer with given key and return @return cipherTextString as result
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*
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* @param plainText buffer of length 16 characters
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* @param key secure key as pointer on char array, function call getKey() is possible, instead of using the second function encryptBuffer()
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* @return cipherTextString String of length 16 characters filled with the encryption result
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*/
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String encryptBuffer(char * plainText, char * key);
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/** Encrypt (AES-128bit ECB encryption mode) the @param plainText char array buffer with @property privateCipherKey and return @return cipherTextString as result
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*
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* @param plainText buffer of length 16 characters
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* @return cipherTextString String of length 16 characters filled with the encryption result
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*/
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String encryptBuffer(char * plainText);
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/** Decrypt (AES-128bit ECB decryption mode) the @param cipherText string with given key and return @return decipheredTextString as result
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*
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* @param cipherText string of length 16 characters
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* @param key secure key as pointer on char array, function call getKey() is possible, instead of using the second function decryptBuffer()
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* @return decipheredTextString String of length 16 characters filled with the decryption result
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*/
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String decryptBuffer(String cipherText, char * key);
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/** Decrypt (AES-128bit ECB decryption mode) the @param cipherText string with @property privateCipherKey and return @return decipheredTextString as result
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*
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* @param cipherText string of length 16 characters
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* @return decipheredTextString String of length 16 characters filled with the decryption result
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*/
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String decryptBuffer(String cipherText);
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/** Encrypt (AES-128bit ECB encryption mode) the @param plainText string with given key and return @return cipherTextString as result
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*
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* @param plainText string of variable length; ending with default ending character '\0'
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* @param key secure key as pointer on char array, function call getKey() is possible, instead of using the second function encryptString()
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* @return cipherTextString String of variable length filled with the encryption result
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*/
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String encryptString(String plainText, char * key);
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/** Encrypt (AES-128bit ECB encryption mode) the @param plainText string with @property privateCipherKey and return @return cipherTextString as result
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*
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* @param plainText string of variable length; ending with default ending character '\0'
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* @return cipherTextString String of variable length filled with the encryption result
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*/
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String encryptString(String plainText);
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/** Decrypt (AES-128bit ECB decryption mode) the @param cipherText string with given key and return @return decipheredTextString as result
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*
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* @param cipherText string of variable length; ending with default ending character '\0'
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* @param key secure key as pointer on char array, function call getKey() is possible, instead of using the second function decryptString()
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* @return decipheredTextString String of length 16 characters filled with the decryption result
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*/
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String decryptString(String cipherText, char * key);
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/** Decrypt (AES-128bit ECB decryption mode) the @param cipherText string with @property privateCipherKey and return @return decipheredTextString as result
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*
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* @param cipherText string of variable length; ending with default ending character '\0'
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* @return decipheredTextString String of length 16 characters filled with the decryption result
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*/
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String decryptString(String cipherText);
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private:
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char * privateCipherKey;
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};
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#endif /* CIPHER_H_ */
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