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JWTDecoder.java
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130 lines (107 loc) · 2.99 KB
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package com.auth0.jwt;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.impl.JWTParser;
import com.auth0.jwt.interfaces.Claim;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.auth0.jwt.interfaces.Header;
import com.auth0.jwt.interfaces.Payload;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.StringUtils;
import java.util.Date;
import java.util.List;
import java.util.Map;
/**
* The JWTDecoder class holds the decode method to parse a given JWT token into it's JWT representation.
*/
@SuppressWarnings("WeakerAccess")
final class JWTDecoder implements DecodedJWT {
private final String[] parts;
private final Header header;
private final Payload payload;
JWTDecoder(String jwt) throws JWTDecodeException {
parts = TokenUtils.splitToken(jwt);
final JWTParser converter = new JWTParser();
String headerJson;
String payloadJson;
try {
headerJson = StringUtils.newStringUtf8(Base64.decodeBase64(parts[0]));
payloadJson = StringUtils.newStringUtf8(Base64.decodeBase64(parts[1]));
} catch (NullPointerException e) {
throw new JWTDecodeException("The UTF-8 Charset isn't initialized.", e);
}
header = converter.parseHeader(headerJson);
payload = converter.parsePayload(payloadJson);
}
@Override
public String getAlgorithm() {
return header.getAlgorithm();
}
@Override
public String getType() {
return header.getType();
}
@Override
public String getContentType() {
return header.getContentType();
}
@Override
public String getKeyId() {
return header.getKeyId();
}
@Override
public Claim getHeaderClaim(String name) {
return header.getHeaderClaim(name);
}
@Override
public String getIssuer() {
return payload.getIssuer();
}
@Override
public String getSubject() {
return payload.getSubject();
}
@Override
public List<String> getAudience() {
return payload.getAudience();
}
@Override
public Date getExpiresAt() {
return payload.getExpiresAt();
}
@Override
public Date getNotBefore() {
return payload.getNotBefore();
}
@Override
public Date getIssuedAt() {
return payload.getIssuedAt();
}
@Override
public String getId() {
return payload.getId();
}
@Override
public Claim getClaim(String name) {
return payload.getClaim(name);
}
@Override
public Map<String, Claim> getClaims() {
return payload.getClaims();
}
@Override
public String getHeader() {
return parts[0];
}
@Override
public String getPayload() {
return parts[1];
}
@Override
public String getSignature() {
return parts[2];
}
@Override
public String getToken() {
return String.format("%s.%s.%s", parts[0], parts[1], parts[2]);
}
}