cryptopp | free C++ class library of cryptographic schemes | Cryptography library

by weidai11 C++ Version: CRYPTOPP_8_7_0 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | cryptopp Summary

cryptopp is a C++ library typically used in Security, Cryptography applications. cryptopp has no bugs, it has no vulnerabilities and it has medium support. However cryptopp has a Non-SPDX License. You can download it from GitHub.

free C++ class library of cryptographic schemes

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Quality

Security

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Support

cryptopp has a medium active ecosystem.

It has 3951 star(s) with 1142 fork(s). There are 191 watchers for this library.

It had no major release in the last 12 months.

There are 38 open issues and 851 have been closed. On average issues are closed in 21 days. There are 4 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of cryptopp is CRYPTOPP_8_7_0

Quality

cryptopp has no bugs reported.

Security

cryptopp has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

cryptopp has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

cryptopp releases are available to install and integrate.

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cryptopp Key Features

No Key Features are available at this moment for cryptopp.

cryptopp Examples and Code Snippets

No Code Snippets are available at this moment for cryptopp.

Community Discussions

Trending Discussions on cryptopp

Crypto++ HexEncoder not working consistently

Diffie Hellman key exchange between C# and C++ on Windows

Crypto++ : Hash generation hangs on windows 10

How to use sha256 in c++ from cryptopp

How to find a point of an elliptic curve in crypto++ (with given x)? Or how to compute a root in finite field? Or root of Polynomial Ring?

CryptoPP generates invalid keys RSA

Using cryptopp-cmake and crypto++ toghter a CMakeLists.txt project file

Inputting data to stringstream with hexadecimal representation

Size discrepancy in file deflated using zlib and Crypto++

LNK2001 errors when trying to using CryptoPP lib in a Qt Project

QUESTION

Crypto++ HexEncoder not working consistently

Asked 2021-Jun-01 at 16:09

Here's my code

...

ANSWER

Answered 2021-Jun-01 at 16:09

void unhexlify(std::string hex_string, CryptoPP::byte* &bytes)
{
    std::string decoded;

    CryptoPP::StringSource ss(hex_string, true, new CryptoPP::HexDecoder(new CryptoPP::StringSink(decoded)));

    std::cout << decoded + "\n"; // For testing
    bytes = (CryptoPP::byte*)decoded.data();  // <--
}

Source https://stackoverflow.com/questions/67792115

QUESTION

Diffie Hellman key exchange between C# and C++ on Windows

Asked 2021-May-21 at 09:43

I want to use the Diffie Hellman algorithm to securely exchange keys between a C++ server an a C# client which both are running on Windows. I tried using ECDiffieHellmanCng in C# to generate a public key as follows:

...

ANSWER

Answered 2021-May-19 at 19:11

Since I simply wanted an encrypted connection, going with OpenSSL was the way to go.

Source https://stackoverflow.com/questions/67574731

QUESTION

Crypto++ : Hash generation hangs on windows 10

Asked 2021-May-04 at 21:37

I have the following simple program :

...

ANSWER

Answered 2021-May-04 at 21:20

Change the line

Source https://stackoverflow.com/questions/67390581

QUESTION

How to use sha256 in c++ from cryptopp

Asked 2021-Mar-17 at 17:41

First of all thank you for reading my question.

I am trying to reproduce what i recieved in python. So bsically I have two numbers and I am trying to make a hash out of them. But with crypto++ library i am a bit confused.

Basically I dont get how to use the update and calculate part.

My codes are

...

ANSWER

Answered 2021-Mar-17 at 17:41

I found the solution I am pasting it here So that it may be useful for someone else.

For calculating right sha256 first to update and then call the calculate function in the manner mentioned below.

Source https://stackoverflow.com/questions/66658476

QUESTION

How to find a point of an elliptic curve in crypto++ (with given x)? Or how to compute a root in finite field? Or root of Polynomial Ring?

Asked 2021-Mar-15 at 08:54

Is there any way in crypto++ to check if an EC contains a point with a given x-coordinate?

One solution would be solving the EC polynomial for given x. One side of the equation already done in code. I 'just' need to compute the root of it (over a finite field)

...

ANSWER

Answered 2021-Mar-15 at 08:54

Yes, you can. The library has support for compression and decompression of points. During the decompression, the library must find y if it can.

The header of the DecodePoint

Source https://stackoverflow.com/questions/66592082

QUESTION

CryptoPP generates invalid keys RSA

Asked 2021-Feb-13 at 18:04

I'm trying to encrypt some text with RSA in c++,

when encrypting I'm generating n, e, d but when trying to decrypt, the private key initializer says the keys are invalid...

So I built a code that generates the keys and then tries to initialize a private key object right after that and it says the keys are still invalid:

...

ANSWER

Answered 2021-Feb-13 at 18:04

You problem is that you modified the exponent after the key was already generated.

Source https://stackoverflow.com/questions/66187717

QUESTION

Using cryptopp-cmake and crypto++ toghter a CMakeLists.txt project file

Asked 2020-Dec-21 at 08:34

I'm using Clion and I'm trying to use cryptopp-cmake for cryptopp in my CMakeLists.txt file, since Cryptopp doesn't have a CMakeLists.txt file in its default project repository. My CMakeLists.txt has this Cryptopp related content:

...

ANSWER

Answered 2020-Aug-03 at 13:40

If a project creates a library with add_library, then link with that library using the target name. Do not use the library file in that case.

According to the cryptopp project's CMakeLists.txt, the name of the library target is cryptopp-shared, so just link with it:

Source https://stackoverflow.com/questions/63229940

QUESTION

Inputting data to stringstream with hexadecimal representation

Asked 2020-Nov-29 at 22:40

I am attempting to extract a hash-digest in hexadecimal via a stringstream, but I cannot get it to work when iterating over data.

Using std::hex I can do this easily with normal integer literals, like this:

...

ANSWER

Answered 2020-Nov-29 at 22:40

First, the std::hex format modifier applies to integers, not to characters. Since you are trying to print unsigned char, the format modifier is not applied. You can fix this by casting to int instead. In your first example, it works because the literal 100 is interpreted as an integer. If you replace 100 with e.g. static_cast(100), you would no longer get the hexadecimal representation.

Second, std::hex is not enough, since you likely want to pad each character to a 2-digit hex value (i.e. F should be printed as 0F). You can fix this by also applying the format modifiers std::setfill('0') and std::setw(2) (reference, reference).

Applying these modifications, your code would then look like this:

Source https://stackoverflow.com/questions/65064642

QUESTION

Size discrepancy in file deflated using zlib and Crypto++

Asked 2020-Nov-29 at 17:54

I'm learning how to raw deflate (no header or trailer information) & inflate data in C++, so I decided to try the zlib and Crypto++ libraries. I've found that, when deflating the same file, Crypto++ sometimes adds 4 extra bytes (depending on the method used).

For example, for a file containing the following sequence, whitespaces included: 1 2 3 4 5 6, deflating with zlib produces a file of size 14 bytes.

This holds true for Crypto++ deflate_method1, but for Crypto++ deflate_method2, the file size is 18 bytes.

Also, when trying to inflate a file that was deflated using Crypto++ deflate_method2 with Crypto++ inflate_method1, an exception is raised:

...

ANSWER

Answered 2020-Nov-29 at 17:54

The first three are working correctly, generating a valid deflate compressed stream with a single, last deflate block.

You "Crypto++ method2" is generating two deflate blocks, where the second one is an empty stored block that is not marked as the last block. This is not a valid deflate stream since it does not terminate. You are not correctly finishing the compression.

Your deflator.Flush(true) is flushing the first block and emitting that empty stored block, without ending the deflate stream.

I'm not seeing much in the way of documentation, or really any at all, but looking at the source code, I would try deflator.EndBlock(true) instead.

Update:

Per the comment below, EndBlock is not public. Instead MessageEnd is what is needed to terminate the deflate stream.

Source https://stackoverflow.com/questions/65042872

QUESTION

LNK2001 errors when trying to using CryptoPP lib in a Qt Project

Asked 2020-Oct-31 at 14:36

I am trying to use CryptoPP lib in a Qt project. I first built Crytplib using Visual C++ 2019. I changed Runtime options to MDd (Multithread Debug DLL). It generated cryptlib.lib.

In Qt, I added:

...

ANSWER

Answered 2020-Oct-31 at 14:36

I finally solved this. It was due to the fact that I was building Crypto++ with MSVC2019 while Qt was built with MSVC2015.

Source https://stackoverflow.com/questions/64618309

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install cryptopp

You can download it from GitHub.

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