Java对PHP服务器hmac_sha1签名认证方法的匹配实现

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J***A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:

[php] view
plaincopy

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);

J***A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:

[java] view
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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
& 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;

}

}

iefreer