package com.github.zhangkaitao.shiro.chapter20.codec;
import org.apache.commons.codec.binary.Hex;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.List;
import java.util.Map;
/**
* <p>User: Zhang Kaitao
* <p>Date: 14-2-26
* <p>Version: 1.0
*/
public class HmacSHA256Utils {
public static String digest(String key, String content) {
try {
Mac mac = Mac.getInstance("HmacSHA256");
byte[] secretByte = key.getBytes("utf-8");
byte[] dataBytes = content.getBytes("utf-8");
SecretKey secret = new SecretKeySpec(secretByte, "HMACSHA256");
mac.init(secret);
byte[] doFinal = mac.doFinal(dataBytes);
byte[] hexB = new Hex().encode(doFinal);
return new String(hexB, "utf-8");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static String digest(String key, Map<String, ?> map) {
StringBuilder s = new StringBuilder();
for(Object values : map.values()) {
if(values instanceof String[]) {
for(String value : (String[])values) {
s.append(value);
}
} else if(values instanceof List) {
for(String value : (List<String>)values) {
s.append(value);
}
} else {
s.append(values);
}
}
return digest(key, s.toString());
}
}