/*
* encrypt(keySize,password,original_message,encrypted_message, mode, padding)
* - encrypts a message using AES Algorithm
*
* Parameters:
* keySize : Size of key to use in AES Algorithm
* password: Key to encrypt plaintext message.
* original_message: Plaintext message before calculating AES Algorithm
* encrypted_message: Ciphertext message after calculating AES Algorithm
* mode: cipher mode, two ways: ECB
* padding: padding mode to fill blocks, tree ways PKCS5, ZEROS, X923
*
* Examples:
* AES.encrypt(128,"libelium","Libelium",encrypted_message,ECB,PKCS5)
*
*/
uint8_t WaspAES::encrypt(uint16_t KeySize,char* Password,char original_message[],uint8_t* encrypted_message,uint8_t mode,uint8_t padding){
// Varibales Declaration
uint16_t size;
size = sizeOfBlocks(original_message);
uint8_t original_data[size];
if (init(Password,KeySize)){
// convert to uint8_t
for (uint16_t i = 0; i < strlen(original_message); i++){
original_data[i] = original_message[i];
}
// Padding the block??
if (strlen(original_message) < size ) {
paddingEncrypt(original_data,size,strlen(original_message),padding);
}
if (mode == ECB){
ECBEncrypt(original_data,size,KeySize);
}
// convert to char
for (uint16_t i=0; i < size+1;i++){
encrypted_message[i] = original_data[i];
}
return 1;
}else{
return 0;
}
}
/*
* encrypt(keySize,password,original_message,encrypted_message, mode, padding)
* - encrypts a message using AES Algorithm
*
* Parameters:
* keySize : Size of key to use in AES Algorithm
* password: Key to encrypt plaintext message.
* original_message: Plaintext message before calculating AES Algorithm
* encrypted_message: Ciphertext message after calculating AES Algorithm
* mode: cipher mode, two ways: ECB
* padding: padding mode to fill blocks, tree ways PKCS5, ZEROS, X923
*
* Examples:
* AES.encrypt(128,"libelium","Libelium",encrypted_message,ECB,PKCS5)
*
*/
uint8_t WaspAES::encrypt( uint16_t keySize,
char* password,
uint8_t* original_message,
uint16_t length,
uint8_t* encrypted_message,
uint8_t mode,
uint8_t padding)
{
// Calculate length in Bytes of the encrypted message
// depending on the size of the original message
uint16_t size;
size = sizeOfBlocks(length);
uint8_t original_data[size];
// init the password and create the round keys which are
// stored in the proper context attribute
if (init(password,keySize))
{
// convert to uint8_t
for (uint16_t i = 0; i < length; i++)
{
original_data[i] = original_message[i];
}
// Padding the block if the length is less than the proper size
if ( length < size )
{
paddingEncrypt( original_data,
size,
length,
padding);
}
if (mode == ECB)
{
ECBEncrypt( original_data, size, keySize);
}
// copy result
for (uint16_t i=0; i < size;i++)
{
encrypted_message[i] = original_data[i];
}
return 1;
}
else
{
return 0;
}
}