Hi All!
I found here a code snippet how to use the JJWT library. I did it in B4J, where it works well. But that was only a test, I need to work on android.
So I ported the code into B4A, but there is a strange error. I think there is missing some more import, but I don't know what.
Here is the code:
What bothers me is that it worked under B4J, but not under B4A.
Can somebody help me?
I found here a code snippet how to use the JJWT library. I did it in B4J, where it works well. But that was only a test, I need to work on android.
So I ported the code into B4A, but there is a strange error. I think there is missing some more import, but I don't know what.
Here is the code:
B4X:
#AdditionalJar: slf4j-api-1.7.36
#AdditionalJar: slf4j-simple-1.7.36.jar
#AdditionalJar: sslcontext-android
#AdditionalJar: jjwt-api-0.11.5.jar
#AdditionalJar: jjwt-impl-0.11.5.jar
#AdditionalJar: jjwt-orgjson-0.11.5.jar
#AdditionalJar:jackson-core-2.12.6.jar
#AdditionalJar:jackson-databind-2.12.6.1.jar
#AdditionalJar:jackson-annotations-2.12.6
...
#if JAVA
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import io.jsonwebtoken.io.Decoders;
import io.jsonwebtoken.security.Keys;
import io.jsonwebtoken.SignatureAlgorithm;
import io.jsonwebtoken.io.Serializer;
import java.security.Key;
import javax.crypto.SecretKey;
import java.util.Base64;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.KeyFactory;
import java.security.interfaces.RSAPrivateKey;
public static String jwtSign(String json,String b64key) throws Exception {
String jws = "";
String s = "0";
try {
SignatureAlgorithm algorithm = SignatureAlgorithm.RS256;
byte[] valueDecoded = Base64.getDecoder().decode(b64key);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(valueDecoded);
KeyFactory rsaFact = KeyFactory.getInstance("RSA");
RSAPrivateKey key = (RSAPrivateKey) rsaFact.generatePrivate(keySpec);
s = "1";
//after this happen the error:
//jwtSign error.1io.jsonwebtoken.lang.UnknownClassException:
//Unable to find an implementation for interface
//io.jsonwebtoken.io.Serializer using java.util.ServiceLoader.
//Ensure you include a backing implementation .jar in the classpath,
//for example jjwt-impl.jar, or your own .jar for custom implementations.
//
jws = Jwts.builder()
.setHeaderParam("alg", "RS256")
.setPayload(json)
//.signWith(SignatureAlgorithm.RS256, b64key)
//.signWith(algorithm,Keys.hmacShaKeyFor(Decoders.BASE64.decode(b64key)))
.signWith(algorithm,key)
.compact();
s = "3";
} catch (Exception e) {
BA.Log("jwtSign error." + s + e);
}
return jws;
}
#End IfCan somebody help me?
