*Update: It seems to be an issue with CFB mode. If I switch to ECB: 12 ms
to process the workload.*
in encrypt aes
Encrypted 1at: 05/12/2023 17:06:54.838
Encrypted 2at: 05/12/2023 17:06:54.838
Encrypted 3at: 05/12/2023 17:06:54.838
returning cipher
Encrypted 4at: 05/12/2023 17:06:54.850
std::string encrypt_aes(std::string message, SecByteBlock key, SecByteBlock
iv) {
try {
cout <<" in encrypt aes " <<endl;
cout << " Encrypted 1at: " << get_curr_datetime_str() << endl;
AlgorithmParameters params = MakeParameters(Name::FeedbackSize(), 1
/*8-bits*/)
(Name::IV(), ConstByteArrayParameter(iv));
cout << " Encrypted 2at: " << get_curr_datetime_str() << endl;
ECB_Mode<AES>::Encryption e;
std::string cipher;
cipher.reserve(message.size()+16);
e.SetKey(key, key.size(), params);
cout << " Encrypted 3at: " << get_curr_datetime_str() << endl;
/*
const size_t buf_sz = 320000;
byte buffer[buf_sz];
StringSink ssk(cipher);
ArraySource ars((const byte*)message.data(), message.size(), true, new
StreamTransformationFilter(e, new ArraySink(buffer,buf_sz)));
while(true){
size_t bread = ars.Get(buffer, buf_sz);
if(bread==0){
break;
}
ssk.Put(buffer,bread);
}
ssk.MessageEnd();
*/
StringSource ss(message, true, new StreamTransformationFilter(e, new
StringSink(cipher)));
cout << " returning cipher " << endl;
cout << " Encrypted 4at: " << get_curr_datetime_str() << endl;
return cipher;
}
catch (CryptoPP::Exception e) {
std::cerr << e.what() << std::endl;
return "";
}
}
On Friday, May 12, 2023 at 11:46:08 AM UTC-4 Dwight Kulkarni wrote:
> Hi Jeff,
>
> The time is taken up all on the one line:
>
>
> StringSource ss(message, true, new StreamTransformationFilter(e, new
> StringSink(cipher)));
>
>
> *Do you know what might be the difference versus the .exe test ?
> <TR><TD>AES/CFB (128-bit key)<TD>ARMv8<TD>344<TD>4.99<TD>1.135<TD>2044*
>
>
>
> Encrypted 1at: 05/12/2023 15:40:55.588
> Encrypted 2at: 05/12/2023 15:40:55.588
> Encrypted 3at: 05/12/2023 15:40:55.588
> returning cipher
> Encrypted 4at: 05/12/2023 15:40:56.599
> Encrypted at: 05/12/2023 15:40:56.600
>
>
> std::string encrypt_aes(std::string message, SecByteBlock key,
> SecByteBlock iv) {
> try {
> cout <<" in encrypt aes " <<endl;
> cout << " Encrypted 1at: " << get_curr_datetime_str() << endl;
> AlgorithmParameters params = MakeParameters(Name::FeedbackSize(), 1
> /*8-bits*/)
> (Name::IV(), ConstByteArrayParameter(iv));
> cout << " Encrypted 2at: " << get_curr_datetime_str() << endl;
> CFB_Mode<AES>::Encryption e;
> std::string cipher;
> cipher.reserve(message.size()+16);
> e.SetKey(key, key.size(), params);
> cout << " Encrypted 3at: " << get_curr_datetime_str() << endl;
> StringSource ss(message, true, new StreamTransformationFilter(e, new
> StringSink(cipher)));
> cout << " returning cipher " << endl;
> cout << " Encrypted 4at: " << get_curr_datetime_str() << endl;
> return cipher;
> }
> catch (CryptoPP::Exception e) {
> std::cerr << e.what() << std::endl;
> return "";
> }
> }
> On Friday, May 12, 2023 at 11:17:32 AM UTC-4 Jeffrey Walton wrote:
>
>> On Fri, May 12, 2023 at 10:48 AM Dwight Kulkarni <[email protected]>
>> wrote:
>> >
>> > The new library is much faster, but I am still not getting that speed
>> in the code. 1 second to encrypt 5 mb versus 3 seconds before.
>> >
>> > I added the .reserve(...) code also.
>>
>> Well, you should profile your code to find the bottlenecks.
>>
>> Jeff
>>
>
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