而妳的服務是由PHP實現的,客戶端是由JAVA實現的,那麽為了對簽名正確比對,就需要在兩者之間建立能匹配的編碼方式.
efine('ID','123456');
define('KEY','k123456');
$strToSign = "test_string";
$utf8Str = mb_convert_encoding($strToSign, "UTF-8");
$hmac_sha1_str = base64_encode(hash_hmac("sha1", $utf8Str, KEY));
$signature = urlencode($hmac_sha1_str);
print_r($signature);
JAVA側需要註意如下幾點:
1. hmac_sha1編碼結果需要轉換成hex格式
2. java中base64的實現和php不壹致,其中java並不會在字符串末尾填補=號以把字節數補充為8的整數
3. hmac_sha1並非sha1, hmac_sha1是需要***享密鑰的
參考實現如下:
[java] view plain copy
import java.io.UnsupportedEncodingException;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.wicket.util.crypt.Base64UrlSafe;
public class test {
public static void main(String[] args) {
String key = "f85b8b30f73eb2bf5d8063a9224b5e90";
String toHash = "GET"+"\n"+"Thu, 09 Aug 2012 13:33:46 +0000"+"\n"+"/ApiChannel/Report.m";
//String toHashUtf8 = URLEncoder.encode(toHash, "UTF-8");
String res = hmac_sha1(toHash, key);
//System.out.print(res+"\n");
String signature;
try {
signature = new String(Base64UrlSafe.encodeBase64(res.getBytes()),"UTF-8");
signature = appendEqualSign(signature);
System.out.print(signature);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
public static String hmac_sha1(String value, String key) {
try {
// Get an hmac_sha1 key from the raw key bytes
byte[] keyBytes = key.getBytes();
SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");
// Get an hmac_sha1 Mac instance and initialize with the signing key
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(signingKey);
// Compute the hmac on input data bytes
byte[] rawHmac = mac.doFinal(value.getBytes());
// Convert raw bytes to Hex
String hexBytes = byte2hex(rawHmac);
return hexBytes;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private static String byte2hex(final byte[] b){
String hs="";
String stmp="";
for (int n=0; n<b.length; n++){
stmp=(java.lang.Integer.toHexString(b[n] & 0xFF));
if (stmp.length()==1) hs=hs+"0"+stmp;
else hs=hs+stmp;
}
return hs;
}
private static String appendEqualSign(String s){
int len = s.length();
int appendNum = 8 - (int)(len/8);
for (int n=0; n<appendNum; n++){
s += "%3D";
}
return s;
}
}
參考：/topic/1002652