Do you want to generate Elliptic Curve Cryptography (ECC) key pairs (public and private keys), write them to a .PEM file, or read them from a .PEM file in C/C++ programming languages?

The ECCPEM library makes it super easy just invoking one function and the job is done!

Before installing the project, make sure you have installed the minimum requirements: the Cmake and OpenSSL libraries.

$ sudo apt-get instal cmake libssl-dev

Use git from the command-line to clone the source code:

$ git clone https://github.com/baloyan/eccpem.git
$ cd eccpem

To configure and build the project run the following commands:

$ mkdir build
$ cd build

$ cmake ..
$ make
$ sudo make install

Create a eccpem_test.c file and write the following code:

#include <eccpem/eccpem.h>
#include <stdio.h>

int main() {

  const char* pubkey_file = "pub_key.pem";
  const char* privkey_file = "priv_key.pem";

  const char* ec_type = "secp256k1";

  const int error_code = CreateECCKeysPemFiles(ec_type, pubkey_file, privkey_file);
  if (error_code == 1) {
    printf("Generation of ECC key pairs was successful.\n");
  } else {
    printf("Generation of ECC key pairs filed.\n");
  }

  return 0;
}

Compile the above code:

$ gcc -o myeccpem eccpem_test.c -leccpem -lssl -lcrypto

Run executable file:

$ ./myeccpem

See C++ example: cpp_gen_pem_files.cpp

Compile C++ code:

$ g++ -o myeccpem cpp_eccpem_test.cpp -leccpem -lssl -lcrypto

For detailed ECCPEM API documentation take a look at eccpem/docs

Contributions can be made by submitting GitHub pull requests to this repository. In general, the ECCPEM source code follows Google's C++ style guide. (Yes, it is for C++, but please follow the rules for C language as well).

All contributions are made under the MIT license. See LICENSE.