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Add Oauth HMACSha256SignatureService #1034

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Add Oauth HMACSha256SignatureService #1034

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51 changes: 51 additions & 0 deletions ...va-core/src/main/java/com/github/scribejava/core/services/HMACSha256SignatureService.java
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package com.github.scribejava.core.services;

import com.github.scribejava.core.exceptions.OAuthSignatureException;
import com.github.scribejava.core.utils.OAuthEncoder;
import com.github.scribejava.core.utils.Preconditions;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;

/**
* @author nick.yin
* @date 2022/2/10
* @since 2022/2/10
*/
@SuppressWarnings("all")
public class HMACSha256SignatureService implements SignatureService {
private static final String EMPTY_STRING = "";
private static final String CARRIAGE_RETURN = "\r\n";
private static final String UTF8 = "UTF-8";
private static final String HMAC_SHA256 = "HmacSHA256";
private static final String METHOD = "HMAC-SHA256";

@Override
public String getSignature(String baseString, String apiSecret, String tokenSecret) {
try {
Preconditions.checkEmptyString(baseString, "Base string cant be null or empty string");
Preconditions.checkEmptyString(apiSecret, "Api secret cant be null or empty string");
return doSign(baseString, OAuthEncoder.encode(apiSecret) + '&' + OAuthEncoder.encode(tokenSecret));
} catch (UnsupportedEncodingException | NoSuchAlgorithmException | InvalidKeyException | RuntimeException e) {
throw new OAuthSignatureException(baseString, e);
}
}

private String doSign(String toSign, String keyString) throws UnsupportedEncodingException,
NoSuchAlgorithmException, InvalidKeyException {
final SecretKeySpec key = new SecretKeySpec(keyString.getBytes(UTF8), HMAC_SHA256);
final Mac mac = Mac.getInstance(HMAC_SHA256);
mac.init(key);
final byte[] bytes = mac.doFinal(toSign.getBytes(UTF8));
return Base64.getEncoder().encodeToString(bytes).replace(CARRIAGE_RETURN, EMPTY_STRING);
}

@Override
public String getSignatureMethod() {
return METHOD;
}
}