Go Hmac SHA1 generates hash different from Hmac SHA1 in Java -

i'm starting learn go , i'm trying rewrite existing small application java go.

i need create base64 hash of input string key using hmac sha1 algorithm.

my java code:

private string getsignedbody(string input, string key) {     string result = "";     try {         secretkeyspec signingkey = new secretkeyspec(key.getbytes("utf-8"), "hmacsha1");         mac mac = mac.getinstance("hmacsha1");         mac.init(signingkey);         byte[] rawhmac = mac.dofinal(input.getbytes("utf-8"));         result = base64.encodetostring(rawhmac, false);     } catch (exception e) {         logger.error("failed generate signature: " + e.getmessage());     }     return result; } 

my go code:

func getsignature(input, key string) string {     key_for_sign := []byte(key)     h := hmac.new(sha1.new, key_for_sign)     h.write([]byte(input))     return base64.stdencoding.encodetostring(h.sum(nil)) } 

the problem go code generates output not expected. example, input string "qwerty" , key "key" java output rid1vimxoaouu3vb1svmchwhfhg= , go output 9cuw7ray671fl65ye3eexgdghd8=.

where did make mistakes in go code?

the go code provided gives same output java code.

try on go playground.

output:

rid1vimxoaouu3vb1svmchwhfhg= 

you made mistake when called getsignature() function. call linked example code:

fmt.println(getsignature("qwerty", "key")) 

your mistake passed empty input getsignature() function. calling empty "" input , "key" key produces non-expected output provided:

fmt.println(getsignature("", "key")) 

output:

9cuw7ray671fl65ye3eexgdghd8=