Node.js

Duplicate openssl dgst -sha256 -sign private.pem -out sha256.sig in.dat

See more OpenSSL Examples

Demonstrates how to duplicate this OpenSSL command:

openssl dgst -sha256 -sign private.pem -out sha256.sig in.dat

The in.dat file can contain text or binary data of any type. The OpenSSL command does the following:

1. Creates a SHA256 digest of the contents of the input file
2. Signs the SHA256 digest using the private key.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var pkey = new chilkat.PrivateKey();

    // Load the private key from an PEM file:
    success = pkey.LoadPemFile("private.pem");
    if (success == false) {
        console.log(pkey.LastErrorText);
        return;
    }

    var rsa = new chilkat.Rsa();

    // Import the private key into the RSA component:
    success = rsa.UsePrivateKey(pkey);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // OpenSSL uses big-endian.
    rsa.LittleEndian = false;

    // Load the file to be signed.
    var bdFileData = new chilkat.BinData();
    success = bdFileData.LoadFile("in.dat");

    var bdSig = new chilkat.BinData();
    success = rsa.SignBd(bdFileData,"sha256",bdSig);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Save the binary signature to a file.
    success = bdSig.WriteFile("signature.sig");
    if (success !== true) {
        console.log("Failed to write signature.sig.");
        return;
    }

    console.log("Success.");

}

chilkatExample();