Oauth HMAC-SHA1 authentication to get contacts from Yahoo! Contacts API [duplicate]
问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Get contacts using Yahoo Contacts API I am developing a sysyem to get Yahoo contacts from users. I have completed all steps from http://developer.yahoo.com/oauth/guide/oauth-auth-flow.html and I already got access token and token secret. I am having problem to sign using HMAC-SHA1 algorithm, I have followed the steps from http://developer.yahoo.com/oauth/guide/oauth-signing.html to generate signing key but when