cn.authing.sdk.java.util.signature.Impl.SignatureComposer Maven / Gradle / Ivy
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java backend sdk for authing
package cn.authing.sdk.java.util.signature.Impl;
import cn.authing.sdk.java.util.signature.ISignatureComposer;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.stream.Collectors;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;
public class SignatureComposer implements ISignatureComposer {
private final static String QUERY_SEPARATOR = "&";
private final static String HEADER_SEPARATOR = "\n";
private static ISignatureComposer composer = null;
public static final String ENCODING = "UTF-8";
private static final String ALGORITHM_NAME = "HmacSHA1";
public static ISignatureComposer getComposer() {
if (null == composer) {
composer = new SignatureComposer();
}
return composer;
}
@Override()
public String composeStringToSign(String method, String uri, Map headers, Map queries) {
StringBuilder sb = new StringBuilder();
sb.append(method).append(HEADER_SEPARATOR);
List list = headers.keySet().stream().sorted().collect(Collectors.toList());
for (String s : list) {
sb.append(s).append(":").append(headers.get(s)).append(HEADER_SEPARATOR);
}
sb.append(buildQueryString(uri, queries));
return sb.toString();
}
private String[] splitSubResource(String uri) {
int queIndex = uri.indexOf("?");
String[] uriParts = new String[2];
if (-1 != queIndex) {
uriParts[0] = uri.substring(0, queIndex);
uriParts[1] = uri.substring(queIndex + 1);
} else {
uriParts[0] = uri;
}
return uriParts;
}
private String buildQueryString(String uri, Map queries) {
String[] uriParts = splitSubResource(uri);
Map sortMap = new TreeMap<>(queries);
if (null != uriParts[1]) {
sortMap.put(uriParts[1], null);
}
StringBuilder queryBuilder = new StringBuilder(uriParts[0]);
if (0 < sortMap.size()) {
queryBuilder.append("?");
}
for (Map.Entry e : sortMap.entrySet()) {
queryBuilder.append(e.getKey());
String value = e.getValue();
if (value == null || value.isEmpty()) {
queryBuilder.append(QUERY_SEPARATOR);
continue;
}
queryBuilder.append("=").append(e.getValue()).append(QUERY_SEPARATOR);
}
String queryString = queryBuilder.toString();
if (queryString.endsWith(QUERY_SEPARATOR)) {
queryString = queryString.substring(0, queryString.length() - 1);
}
return queryString;
}
@Override()
public String getAuthorization(String accessKeyId, String accessKeySecret, String stringToSign) {
String signature = signString(stringToSign, accessKeySecret);
return "authing " + accessKeyId + ":" + signature;
}
private String signString(String stringToSign, String accessKeySecret) {
try {
Mac mac = Mac.getInstance(ALGORITHM_NAME);
mac.init(new SecretKeySpec(accessKeySecret.getBytes(ENCODING), ALGORITHM_NAME));
byte[] signData = mac.doFinal(stringToSign.getBytes(ENCODING));
return DatatypeConverter.printBase64Binary(signData);
} catch (NoSuchAlgorithmException | UnsupportedEncodingException | InvalidKeyException e) {
throw new IllegalArgumentException(e.toString());
}
}
}
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