Node.js

Create PEM-encoded PKCS#7 Detached Signature

See more Digital Signatures Examples

Demonstrates how to create a PKCS7 PEM-encoded object containing a detached signature. 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 cert = new chilkat.Cert();

    //  Load the cert and private key.
    success = cert.LoadPfxFile("qa_data/pfx/myCertAndKey.p12","password");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    var crypt = new chilkat.Crypt2();

    success = crypt.SetSigningCert(cert);
    if (success !== true) {
        console.log(crypt.LastErrorText);
        return;
    }

    //  Use SHA-256
    crypt.HashAlgorithm = "sha256";

    //  Hash the utf-8 byte representation of the string
    crypt.Charset = "utf-8";

    //  Return the result in base64
    crypt.EncodingMode = "base64Mime";

    //  Sign some text to create a detached signature (i.e. a signature that does not include the signed data)
    var textToSign = "This is the text to be hashed and signed.";
    var sigBase64 = crypt.SignStringENC(textToSign);
    if (crypt.LastMethodSuccess !== true) {
        console.log(crypt.LastErrorText);
        return;
    }

    console.log(sigBase64);

    //  The result:

    //  MIIWbgYJKoZIhvcNAQcCoIIWXzCCFlsCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
    //  ghMXMIIFuzCCA6OgAwIBAgIIVwoRl0LE48wwDQYJKoZIhvcNAQELBQAwazELMAkGA1UEBhMCSVQx
    //  ...
    //  ...

    //  If we want it in PEM format with just LF line-endings:
    var sb = new chilkat.StringBuilder();
    //  Just LF line endings, not CRLF.
    var crlf = false;
    sb.AppendLine("-----BEGIN PKCS7-----",crlf);
    sb.Append(sigBase64);
    sb.AppendLine("-----END PKCS7-----",crlf);
    sb.ToLF();

    //  Save to a file.
    sb.WriteFile("c:/temp/qa_output/sig.pem","utf-8",false);

    //  Examine..
    console.log(sb.GetAsString());

    //  Result is:

    //  -----BEGIN PKCS7-----
    //  MIIWbgYJKoZIhvcNAQcCoIIWXzCCFlsCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
    //  ghMXMIIFuzCCA6OgAwIBAgIIVwoRl0LE48wwDQYJKoZIhvcNAQELBQAwazELMAkGA1UEBhMCSVQx
    //  DjAMBgNVBAcMBU1pbGFuMSMwIQYDVQQKDBpBY3RhbGlzIFMucC5BLi8wMzM1ODUyMDk2NzEnMCUG
    //  A1UEAwweQWN0YWxpcyBBdXRoZW50aWNhdGlvbiBSb290IENBMB4XDTExMDkyMjExMjIwMloXDTMw
    //  MDkyMjExMjIwMlowazELMAkGA1UEBhMCSVQxDjAMBgNVBAcMBU1pbGFuMSMwIQYDVQQKDBpBY3Rh
    //  bGlzIFMucC5BLi8wMzM1ODUyMDk2NzEnMCUGA1UEAwweQWN0YWxpcyBBdXRoZW50aWNhdGlvbiBS
    //  b290IENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAp8bEpSmkLO/lGMWwUKNvUTuf
    //  ClrJwkg4CsIcoBh/kbWHuUA/3R1oHwiD1S0eiKD4j1aPbZkCkpAW1V8IbInX4ay8IMKx4INRimlN
    //  AJZaby/ARH6jDuSRzVju3PvHHkVH3Se5CAGfpiEd9UEtL0z9KK3giq0itFZljoZUj5NDKd45Rnij
    //  MCO6zfB9E1fAXdKDa0hMxKufgFpbOr3JpyI/gCczWw63igxdBzcIy2zSekciRDXFzMwujt0q7bd9
    //  ...
    //  ...
    //  -----END PKCS7-----

}

chilkatExample();