Invalid signature in java

[Ananda Krishna]

Hi,

I am getting oauth_signature error .How to resolve this issue in java?

Error Message:Invalid signature: oauth_signature 'JmVGKnfp83t65HqlIAdyASawYhk

Any help would be appreciated.

Regards,

AnandaKrishna S

[Len]

Hey AnandaKrishna,

 

There's many posts in the forums about resolving OAuth signature issues, so if you could please peruse those first and then you're welcome to post code (that doesn't reveal your secret).

 

All the best,

Len

[Ananda Krishna]

hi ,

This is my code for hmac signature:

public static String computeHmac(String baseString, String key) throws Exception {

        Mac mac = Mac.getInstance("HmacSHA1");

        SecretKeySpec secret = new SecretKeySpec(key.getBytes(), mac.getAlgorithm());

        mac.init(secret);

        byte[] digest = mac.doFinal(baseString.getBytes("utf-8"));

        return (Base64.encode(digest));

       

    }

    public static String encodeUrl(String web_url) throws Exception {

        String encodedReqUrl = URLEncoder.encode(web_url, "UTF-8");

        return (encodedReqUrl);

    }

    public static String randomString() {

        final String ALPHA_NUM = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        StringBuilder sb = new StringBuilder(5);

        for (int i = 0; i < 5; i++) {

            int ndx = (int) (Math.random() * ALPHA_NUM.length());

            sb.append(ALPHA_NUM.charAt(ndx));

        }

        return (sb.toString());

    }

    public static String getSignaturedUrl(String methodType) throws Exception {

        String outhSignature = "";

        String finalUrl = "";

        String requestUrl = "http://platform.fatsecret.com/rest/server.api";

        String ecnodedUrl = Hmac_signature.encodeUrl(requestUrl);

        Long tstamp = System.currentTimeMillis() / 1000;

        int timestamp = tstamp.intValue();

        String nonce = Hmac_signature.randomString();

        String parameters = "oauth_consumer_key=xxxxxxx&oauth_signature_method=HMAC-SHA1&oauth_timestamp=" + timestamp + "&oauth_version=1.0&oauth_nonce="+ nonce;

        String encodedParm = Hmac_signature.encodeUrl(parameters);

        String baseString = "POST&" + ecnodedUrl + "&" + encodedParm;

        String key = "yyyyyy&";

        outhSignature = Hmac_signature.computeHmac(baseString, key);

        finalUrl = "http://platform.fatsecret.com/rest/server.api?"+parameters+"&oauth_signature="+outhSignature+"&format=json&method="+methodType;

        return (finalUrl);

    }

Please tell me where am i going wrong..

Regards,

AnandaKrishna S