Android HmacSHA256 Create hmacSha1(String str, String keyString)

Description

hmac Sha

License

Apache License

Declaration

public static String hmacSha1(String str, String keyString) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class Main {
    private static final char[] hexDigits = "0123456789abcdef"
            .toCharArray();// w w w  .  j  a v a 2 s  . c  om

    public static String hmacSha1(String str, String keyString) {
        final byte[] keyBytes = keyString.getBytes();
        try {
            SecretKey key = new SecretKeySpec(keyBytes, "HmacSHA1");
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(key);
            final byte[] sbs = str.getBytes();
            byte[] result = mac.doFinal(sbs);
            return toHex(result);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        } catch (InvalidKeyException e) {
            e.printStackTrace();
            return null;
        }

    }

    public static final String toHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder(2 * bytes.length);
        for (byte b : bytes) {
            sb.append(hexDigits[(b >> 4) & 0xf]).append(hexDigits[b & 0xf]);
        }
        return sb.toString();
    }
}

Related

1. getHmacSha256Base64(String key, String data)
2. encryptHMAC(String data, String secret)