void encrypt_buffer_with_key(char* buffer, char* pubkey)
{
if(pubkey[0] == '\0')
return;
RSA * rsa = createRSA(pubkey,1);
char encrypted[BUFFER_SIZE];
RSA_public_encrypt(BUFFER_SIZE, buffer, encrypted, rsa, RSA_PKCS1_PADDING);
for(int i=0; i<BUFFER_SIZE; ++i)
buffer[i] = encrypted[i];
}
// Decrypts data ecnrypted by RSA algorithm
std::vector<uint8_t> Rsa::Decrypt(std::vector<uint8_t> const& data, unsigned char* key, bool isPublic)
{
if (data.empty())
return data;
uint8_t decrypted[4098];
RSA* rsa = createRSA(key, isPublic);
if (!rsa)
return data;
int(*decryptFnc)(int, unsigned char const*, unsigned char*, RSA*, int) = isPublic ? RSA_public_decrypt : RSA_private_decrypt;
int decryptedLength = decryptFnc((int)data.size(), data.data(), decrypted, rsa, RSA_PKCS1_PADDING);
if (decryptedLength == -1)
return data;
std::vector<uint8_t> value(decryptedLength);
std::memcpy(&value[0], decrypted, decryptedLength);
return value;
}
int private_decrypt(unsigned char* data, int data_len, unsigned char* key, unsigned char* decrypted, int padding){
RSA* rsa = createRSA(key, 0);
int result = RSA_private_decrypt(data_len, data, decrypted, rsa, padding);
RSA_free(rsa);
return result;
}
int public_encrypt(unsigned char* data, int data_len, unsigned char* key, unsigned char* encrypted, int padding){
RSA* rsa = createRSA(key, 1);
int result = RSA_public_encrypt(data_len, data, encrypted, rsa, padding);
RSA_free(rsa);
return result;
}
static int public_decrypt(unsigned char * enc_data,int data_len,unsigned char * key, unsigned char *decrypted)
{
RSA * rsa = createRSA(key,1);
int result = RSA_public_decrypt(data_len,enc_data,decrypted,rsa,padding);
return result;
}
static int private_encrypt(unsigned char * data,int data_len,unsigned char * key, unsigned char *encrypted)
{
RSA * rsa = createRSA(key,0);
int result = RSA_private_encrypt(data_len,data,encrypted,rsa,padding);
return result;
}
int private_decrypt(unsigned char * enc_data,int data_len,unsigned char * key, unsigned char *decrypted)
{
RSA * rsa = createRSA(key,0);
int result = RSA_private_decrypt(data_len,enc_data,decrypted,rsa,RSA_PKCS1_PADDING);
return result;
}
