如何使用OAuth签名方法为HMAC-SHA1加密签署请求

Question

我们正在尝试与另一家公司的自定义API建立联系，该API使用两条腿OAuth来验证请求并向我们发送回复。

目前我们的代码正在发送请求，但未在另一端进行身份验证，因此发送了一个UNAUTHORIZED响应。

正如其他公司所说，认证包括以下步骤。

＆＃34;使用两条腿OAuth身份验证处理身份验证：

All requests must include both an oauth_consumer_key and an oauth_signature attribute submitted via the HTTP GET method.
    The oauth_consumer_key attribute will be the user name that the user uses to access our web site.
    The oauth_signature attribute is obtained by signing the request with the OAuth signature method for HMAC-SHA1 encryption. The signature is generated using both the oauth_consumer_key attribute and the consumer secret. A single consumer secret is required per franchise and can be obtained upon request from test@examplerelationships.com.
OAuth libraries are available for many languages here: http://oauth.net/code/."

我们在最后使用Scribe java库尝试的是

public static void main(String[] args){
        String oauth_consumer_key = "test@example.com";
        String oauth_signature = "keyprovided";
        OAuthService service = new ServiceBuilder()
           .provider(Dummy.class)
           .apiKey(oauth_consumer_key)
           .apiSecret(oauth_signature)
           .build();
        OAuthRequest request = new OAuthRequest(Verb.GET,"https://example.com/api/users");
        Token accessToken = new Token("","");
        service.signRequest(accessToken, request);
        Response response = request.send();
        System.out.println(response.getHeaders());
        System.out.println(response.getBody());
    }

目前的回复是401-Unauthorized。还有什么可以遗漏？那么HMAC-SHA1加密呢？我对oauth有点了解。