I am using

window.crypto.subtle.importKey

on the localhost, It works fine. But when I put the code on the server, It is giving error Can not read property importKey of undefined. As I know, I am not using this in a secure https connection. Therefore it is showing the error. I checked this issue crypto.subtle for unsecure origins in Chrome
How to enable crypto.subtle for unsecure origins in Chrome?

Is there any alternative for this to fix the issue?

Here is the code

        var contents = e.target.result;//Data from the PKCS#12 file input

        var pkcs12Der = arrayBufferToString(contents)

        var pkcs12B64 = forge.util.encode64(pkcs12Der);

        var pkcs12Der = forge.util.decode64(pkcs12B64);

        var pkcs12Asn1 = forge.asn1.fromDer(pkcs12Der);



        var pkcs12 = forge.pkcs12.pkcs12FromAsn1(pkcs12Asn1, false, password);

        var privateKey

        for (var sci = 0; sci < pkcs12.safeContents.length; ++sci) {

            var safeContents = pkcs12.safeContents[sci];

            for (var sbi = 0; sbi < safeContents.safeBags.length; ++sbi) {

                var safeBag = safeContents.safeBags[sbi];

                if (safeBag.type === forge.pki.oids.keyBag) {

                    privateKey = safeBag.key;

                } else if (safeBag.type === forge.pki.oids.pkcs8ShroudedKeyBag) {

                    privateKey = safeBag.key;

                } else if (safeBag.type === forge.pki.oids.certBag) { }

            }

        }

        var privateKeyInfoDerBuff = _privateKeyToPkcs8(privateKey);



        //Import the webcrypto key

        window.crypto.subtle.importKey('pkcs8', privateKeyInfoDerBuff,

            { name: "RSASSA-PKCS1-v1_5", hash: { name: "SHA-256" } }, true, ["sign"])

            .then(function (cryptoKey) {

                var digestToSignBuf = stringToArrayBuffer(message);

                crypto.subtle.sign({ name: "RSASSA-PKCS1-v1_5" }, cryptoKey, digestToSignBuf)

                    .then(function (signature) {

                       // Other code will come here

                    });

            })