package phamos;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
public class HMACSHA1 {
private static final String HMAC_SHA1 = “HmacSHA1”;
/**
* 生成签名数据
*
* @param data 待加密的数据
* @param key 加密使用的key
* @throws InvalidKeyException
* @throws NoSuchAlgorithmException
*/
public static String getSignature(String data,String key) throws Exception{
byte[] keyBytes=key.getBytes();
SecretKeySpec signingKey = new SecretKeySpec(keyBytes, HMAC_SHA1);
Mac mac = Mac.getInstance(HMAC_SHA1);
mac.init(signingKey);
byte[] rawHmac = mac.doFinal(data.getBytes());
StringBuilder sb=new StringBuilder();
for(byte b:rawHmac){
sb.append(byteToHexString(b));
}
return sb.toString();
}
private static String byteToHexString(byte ib){
char[] Digit={
‘0’,’1′,’2′,’3′,’4′,’5′,’6′,’7′,’8′,’9′,’a’,’b’,’c’,’d’,’e’,’f’
};
char[] ob=new char[2];
ob[0]=Digit[(ib>>>4)& 0X0f];
ob[1]=Digit[ib & 0X0F];
String s=new String(ob);
return s;
}
}
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