301N November 2018 / Mbed 2 deprecated openssl_encr

13 nov 12.30 pm

Dependencies:   mbed-rtos mbed wolfSSL

main.cpp@0:1c8dabfe6522, 2018-11-13 (annotated)

Committer:
preyaa4
Date:
Tue Nov 13 07:06:14 2018 +0000
Revision:
0:1c8dabfe6522
13 nov 12.30 pm

Who changed what in which revision?

UserRevisionLine numberNew contents of line
preyaa4 0:1c8dabfe6522 1 #include "mbed.h"
preyaa4 0:1c8dabfe6522 2
preyaa4 0:1c8dabfe6522 3 #include <iostream>
preyaa4 0:1c8dabfe6522 4 #include <string.h>
preyaa4 0:1c8dabfe6522 5 #include <wolfssl/openssl/rsa.h>
preyaa4 0:1c8dabfe6522 6 #include <wolfssl/openssl/pem.h>
preyaa4 0:1c8dabfe6522 7 #include <wolfssl/openssl/err.h>
preyaa4 0:1c8dabfe6522 8
preyaa4 0:1c8dabfe6522 9 #include "openssl_rsa.h"
preyaa4 0:1c8dabfe6522 10
preyaa4 0:1c8dabfe6522 11
preyaa4 0:1c8dabfe6522 12 using namespace std;
preyaa4 0:1c8dabfe6522 13
preyaa4 0:1c8dabfe6522 14
preyaa4 0:1c8dabfe6522 15 int main() {
preyaa4 0:1c8dabfe6522 16
preyaa4 0:1c8dabfe6522 17 LOG("OpenSSL_RSA has been started.");
preyaa4 0:1c8dabfe6522 18
preyaa4 0:1c8dabfe6522 19 RSA *private_key;
preyaa4 0:1c8dabfe6522 20 RSA *public_key;
preyaa4 0:1c8dabfe6522 21
preyaa4 0:1c8dabfe6522 22 char message[KEY_LENGTH / 8] = "Batuhan AVLAYAN - OpenSSL_RSA demo";
preyaa4 0:1c8dabfe6522 23 char *encrypt = NULL;
preyaa4 0:1c8dabfe6522 24 char *decrypt = NULL;
preyaa4 0:1c8dabfe6522 25
preyaa4 0:1c8dabfe6522 26 char private_key_pem[12] = "private_key";
preyaa4 0:1c8dabfe6522 27 char public_key_pem[11] = "public_key";
preyaa4 0:1c8dabfe6522 28
preyaa4 0:1c8dabfe6522 29 LOG(KEY_LENGTH);
preyaa4 0:1c8dabfe6522 30 LOG(PUBLIC_EXPONENT);
preyaa4 0:1c8dabfe6522 31
preyaa4 0:1c8dabfe6522 32 RSA *keypair = RSA_generate_key(KEY_LENGTH, PUBLIC_EXPONENT, NULL, NULL);
preyaa4 0:1c8dabfe6522 33 LOG("Generate key has been created.");
preyaa4 0:1c8dabfe6522 34
preyaa4 0:1c8dabfe6522 35 private_key = create_RSA(keypair, PRIVATE_KEY_PEM, private_key_pem);
preyaa4 0:1c8dabfe6522 36 LOG("Private key pem file has been created.");
preyaa4 0:1c8dabfe6522 37
preyaa4 0:1c8dabfe6522 38 public_key = create_RSA(keypair, PUBLIC_KEY_PEM, public_key_pem);
preyaa4 0:1c8dabfe6522 39 LOG("Public key pem file has been created.");;
preyaa4 0:1c8dabfe6522 40
preyaa4 0:1c8dabfe6522 41 encrypt = (char*)malloc(RSA_size(public_key));
preyaa4 0:1c8dabfe6522 42 int encrypt_length = public_encrypt(strlen(message) + 1, (unsigned char*)message, (unsigned char*)encrypt, public_key, RSA_PKCS1_OAEP_PADDING);
preyaa4 0:1c8dabfe6522 43 if(encrypt_length == -1) {
preyaa4 0:1c8dabfe6522 44 LOG("An error occurred in public_encrypt() method");
preyaa4 0:1c8dabfe6522 45 }
preyaa4 0:1c8dabfe6522 46 LOG("Data has been encrypted.");
preyaa4 0:1c8dabfe6522 47
preyaa4 0:1c8dabfe6522 48 create_encrypted_file(encrypt, public_key);
preyaa4 0:1c8dabfe6522 49 LOG("Encrypted file has been created.");
preyaa4 0:1c8dabfe6522 50
preyaa4 0:1c8dabfe6522 51 decrypt = (char *)malloc(encrypt_length);
preyaa4 0:1c8dabfe6522 52 int decrypt_length = private_decrypt(encrypt_length, (unsigned char*)encrypt, (unsigned char*)decrypt, private_key, RSA_PKCS1_OAEP_PADDING);
preyaa4 0:1c8dabfe6522 53 if(decrypt_length == -1) {
preyaa4 0:1c8dabfe6522 54 LOG("An error occurred in private_decrypt() method");
preyaa4 0:1c8dabfe6522 55 }
preyaa4 0:1c8dabfe6522 56 LOG("Data has been decrypted.");
preyaa4 0:1c8dabfe6522 57
preyaa4 0:1c8dabfe6522 58 FILE *decrypted_file = fopen("decrypted_file.txt", "w");
preyaa4 0:1c8dabfe6522 59 fwrite(decrypt, sizeof(*decrypt), decrypt_length - 1, decrypted_file);
preyaa4 0:1c8dabfe6522 60 fclose(decrypted_file);
preyaa4 0:1c8dabfe6522 61 LOG("Decrypted file has been created.");
preyaa4 0:1c8dabfe6522 62
preyaa4 0:1c8dabfe6522 63 RSA_free(keypair);
preyaa4 0:1c8dabfe6522 64 free(private_key);
preyaa4 0:1c8dabfe6522 65 free(public_key);
preyaa4 0:1c8dabfe6522 66 free(encrypt);
preyaa4 0:1c8dabfe6522 67 free(decrypt);
preyaa4 0:1c8dabfe6522 68 LOG("OpenSSL_RSA has been finished.");
preyaa4 0:1c8dabfe6522 69
preyaa4 0:1c8dabfe6522 70 return 0;
preyaa4 0:1c8dabfe6522 71 }