private static String generateRecurlyHMAC(String privateJsKey, String protectedParams) {
        try {
            SecretKey sk = new SecretKeySpec(privateJsKey.getBytes(), "HmacSHA1");
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(sk);
            byte[] result = mac.doFinal(protectedParams.getBytes("UTF-8"));
            return BaseEncoding.base16().encode(result).toLowerCase();
        } catch (Exception e) {
            log.error("Error while trying to generate Recurly HMAC signature", e);
            return null;
        }
    }
private static String generateRecurlyHMAC ( String privateJsKey , String protectedParams ) { try { SecretKey sk = new SecretKeySpec ( privateJsKey . getBytes ( ) , "HmacSHA1" ) ; Mac mac = Mac . getInstance ( "HmacSHA1" ) ; mac . init ( sk ) ; byte [ ] result = mac . doFinal ( protectedParams . getBytes ( "UTF-8" ) ) ; return BaseEncoding . base16 ( ) . encode ( result ) . toLowerCase ( ) ; } catch ( Exception e ) { log . error ( "Error while trying to generate Recurly HMAC signature" , e ) ; return null ; } }
HMAC-SHA1 Hash Generator - Helper method
<p>
Returns a signature key for use with recurly.js BuildSubscriptionForm.

@param privateJsKey recurly.js private key
@param protectedParams protected parameter string in the format: &lt;secure_hash&gt;|&lt;protected_string&gt;
@return subscription object on success, null otherwise