Java Requires Chilkat v11.0.0+

Walmart Partner API Authentication (Generate a Signature for a Request)

See more RSA Examples

Demonstrates how to generate a signature for a Walmart Partner REST API call. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.DateTime;
import com.chilkatsoft.chilkat2.PrivateKey;
import com.chilkatsoft.chilkat2.Rsa;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        String consumerId = "b68d2a72....";
        String baseUrl = "https://marketplace.walmartapis.com/v2/feeds";
        // This is your Base64 encoded private key
        String privateEncodedStr = "MIICeAIBADANBgkqhkiG9w0BAQEFAA......";
        String httpMethod = "GET";

        // We need a timestamp in decimal string form representing the number of milliseconds since Jan 01 1970 UTC.
        DateTime dt = new DateTime();
        // Set bLocal = true for a timestamp in the local timezone.  Set bLocal = false for a UTC timestamp.
        boolean bLocal = false;
        // This gets the timestamp in seconds, not milliseconds.
        int timeStampVal = (int) dt.getAsUnixTime(bLocal);

        // Build the string to sign.
        StringBuilder sbStringToSign = new StringBuilder();
        sbStringToSign.append(consumerId);
        sbStringToSign.append("\n");
        sbStringToSign.append(baseUrl);
        sbStringToSign.append("\n");
        sbStringToSign.append(httpMethod);
        sbStringToSign.append("\n");
        sbStringToSign.appendInt(timeStampVal);
        // We add three zero's so that the timestamp value is in milliseconds.
        // We don't care about accuracy down to less than a second.
        // All the server cares about is that the request was signed at the current date/time
        // within some reasonable margin of error (to account for systems having clocks
        // that may be slightly different).
        sbStringToSign.append("000\n");

        PrivateKey privKey = new PrivateKey();
        // Load the private key into a private key object.
        // Note: Technically the private key is not PEM because it lacks the header/footer strings
        // used for PEM.  However, the LoadPem method will still accept it and load it correctly.
        try {
            privKey.loadPem(privateEncodedStr);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Rsa rsa = new Rsa();
        String signatureString;
        try {
            rsa.usePrivateKey(privKey);

            // We want a base64 signature string.
            rsa.setEncodingMode("base64");

            signatureString = rsa.signStringENC(sbStringToSign.getAsString(), "SHA256");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Signature String: " + signatureString);
    }
}