Java对PHP服务器hmac_sha1签名认证方法的匹配实现

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如果你的API服务安全认证协议中要求使用hmac_sha1方法对信息进行编码,

而你的服务是由PHP实现的,客户端是由JAVA实现的,那么为了对签名正确比对,就需要在两者之间建立能匹配的编码方式.

PHP侧如下:

define('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侧需要注意如下几点:

1. hmac_sha1编码结果需要转换成hex格式

2. java中base64的实现和php不一致,其中java并不会在字符串末尾填补=号以把字节数补充为8的整数

3. hmac_sha1并非sha1, hmac_sha1是需要共享密钥的

参考实现如下:

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;}}

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