Not the same result while repeating the same operation #18
Description
Hi, thank you for your work :)
Environment : ESP8266 12E
I tested your librairy 3 times on the same string, but the results are not the same on each.
Here's my code :
#include <AES.h>
#include <Base64.h>
AES aes;
byte key[] = {0x4C, 0x7E, 0x19, 0x16, 0x28, 0x87, 0xD2, 0xA8, 0xAB, 0xF1, 0x15, 0x88, 0x02, 0xCF, 0x4E, 0x3C};
byte iv[] = {0x46, 0xc5, 0x12, 0x05, 0x3f, 0x1c, 0xc7, 0x1d, 0x2a, 0xa1, 0x27, 0xcd, 0xab, 0x7d, 0xcc, 0x9a};
char* message1 = "pmscnv687,232o,0";
char* message2 = "pmscnv687,232o,0";
char* message3 = "pmscnv687,232o,0";
void setup() {
Serial.begin(115200);
Serial.println("Booting...");
char encryptMsg1[200];
encryptAES(message1, encryptMsg1);
Serial.println(encryptMsg1);
char encryptMsg2[200];
encryptAES(message2, encryptMsg2);
Serial.println(encryptMsg2);
char encryptMsg3[200];
encryptAES(message3, encryptMsg3);
Serial.println(encryptMsg3);
}
void encryptAES(char* message, char* output)
{
aes.set_key(key, sizeof(key));
byte cipher[300];
char b64data[300];
memset(cipher, 0x00, 300);
memset(b64data, '\0', 300);
Serial.println("===");
Serial.printf("%s , %d\n", message, strlen(message));
//int b64len = base64_encode(b64data, message, strlen(message));
// Encrypt! With AES128, our key and IV, CBC and pkcs7 padding
aes.do_aes_encrypt((byte*)message, strlen(message), cipher, key, 128, iv);
base64_encode(output, (char*)cipher, aes.get_size());
}
Here the output :
===
pmscnv687,232o,0 , 16
rxUZg7tFONY5TjW8Kk6ehw==
===
pmscnv687,232o,0 , 16
hC/xnjNW7EiVgLM7u60bmw==
===
pmscnv687,232o,0 , 16
gm9YHW9WE8XPWRZEoJgTqg==
The first result is ok while decrypting, the 2 others are not.
I try to initialize the AES object in my encryptAES() function, I had the same result.
If I reset the sketch, I have exactly the same output.