If your API service security authentication protocol requires the use of hmac_sha1 method to encode information,

and your service is implemented by PHP and the client is implemented by JAVA, In order to correctly compare signatures, it is necessary to establish a matching encoding method between the two.

efine('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);

p>

The following points need to be noted on the JAVA side:

1. The hmac_sha1 encoding result needs to be converted into hex format

2. The implementation of base64 in java is inconsistent with php, among which java The = sign is not padded at the end of the string to add the number of bytes to an integer of 8

3. hmac_sha1 is not sha1, hmac_sha1 requires a shared key

The reference implementation is as follows:

[java] view plain copy

import java.io.UnsupportedEncodingException;

import javax.crypto.Mac;

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) {

}

}

private static String byte2hex(final byte[] b){

String hs="";

String stmp="";

for (int n=0; n

stmp=(java.lang.Integer.toHexString(b[n] & 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

s += "%3D";

}

return s;

}

}

Reference:/topic/1002652