java相当于php的hmac-SHA1
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java equivalent to php's hmac-SHA1
提问by Bee
I'm looking for a java equivalent to this php call:
我正在寻找一个相当于这个 php 调用的 java：
hash_hmac('sha1', "test", "secret")
I tried this, using java.crypto.Mac, but the two do not agree:
我试过这个，使用java.crypto.Mac，但两者不同意：
String mykey = "secret";
String test = "test";
try {
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec secret = new SecretKeySpec(mykey.getBytes(),"HmacSHA1");
mac.init(secret);
byte[] digest = mac.doFinal(test.getBytes());
String enc = new String(digest);
System.out.println(enc);
} catch (Exception e) {
System.out.println(e.getMessage());
}
The outputs with key = "secret" and test = "test" do not seem to match.
key = "secret" 和 test = "test" 的输出似乎不匹配。
采纳答案by Dirk D
In fact they do agree.
As Hans Doggen already noted PHP outputs the message digest using hexadecimal notation unless you set the raw output parameter to true.
If you want to use the same notation in Java you can use something like
事实上，他们确实同意。
正如 Hans Doggen 已经指出的那样，除非您将原始输出参数设置为 true，否则 PHP 会使用十六进制表示法输出消息摘要。
如果你想在 Java 中使用相同的符号，你可以使用类似的东西
for (byte b : digest) {
System.out.format("%02x", b);
}
System.out.println();
to format the output accordingly.
相应地格式化输出。
回答by Hans Doggen
回答by serg
Haven't tested it, but try this:
还没有测试过，但试试这个：
BigInteger hash = new BigInteger(1, digest);
String enc = hash.toString(16);
if ((enc.length() % 2) != 0) {
enc = "0" + enc;
}
This is snapshot from my method that makes java's md5 and sha1 match php.
这是我的方法的快照，它使 java 的 md5 和 sha1 匹配 php。
回答by atomsfat
This is my implementation :
这是我的实现：
String hmac = "";
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec secret = new SecretKeySpec(llave.getBytes(), "HmacSHA1");
mac.init(secret);
byte[] digest = mac.doFinal(cadena.getBytes());
BigInteger hash = new BigInteger(1, digest);
hmac = hash.toString(16);
if (hmac.length() % 2 != 0) {
hmac = "0" + hmac;
}
return hmac;
回答by dharan
You can try this in Java:
你可以在 Java 中试试这个：
private static String computeSignature(String baseString, String keyString) throws GeneralSecurityException, UnsupportedEncodingException {
SecretKey secretKey = null;
byte[] keyBytes = keyString.getBytes();
secretKey = new SecretKeySpec(keyBytes, "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(secretKey);
byte[] text = baseString.getBytes();
return new String(Base64.encodeBase64(mac.doFinal(text))).trim();
}
回答by Krizko
My implementation for HmacMD5 - just change algorithm to HmacSHA1:
我对 HmacMD5 的实现 - 只需将算法更改为 HmacSHA1：
SecretKeySpec keySpec = new SecretKeySpec("secretkey".getBytes(), "HmacMD5");
Mac mac = Mac.getInstance("HmacMD5");
mac.init(keySpec);
byte[] hashBytes = mac.doFinal("text2crypt".getBytes());
return Hex.encodeHexString(hashBytes);
回答by Akhil
This way I could get the exact same string as I was getting with hash_hmac in php
这样我就可以得到与我在 php 中使用 hash_hmac 得到的完全相同的字符串
String result;
try {
String data = "mydata";
String key = "myKey";
// 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(data.getBytes());
// Convert raw bytes to Hex
byte[] hexBytes = new Hex().encode(rawHmac);
// Covert array of Hex bytes to a String
result = new String(hexBytes, "ISO-8859-1");
out.println("MAC : " + result);
}
catch (Exception e) {
}
