org.apache.james.jmap.draft.crypto.JamesSignatureHandler Maven / Gradle / Ivy
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package org.apache.james.jmap.draft.crypto;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.Signature;
import java.security.SignatureException;
import java.util.Base64;
import javax.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
public class JamesSignatureHandler implements SignatureHandler {
private static final Logger LOGGER = LoggerFactory.getLogger(JamesSignatureHandler.class);
public static final String ALGORITHM = "SHA1withRSA";
private final SecurityKeyLoader keyLoader;
private AsymmetricKeys securityKeys;
@Inject
@VisibleForTesting JamesSignatureHandler(SecurityKeyLoader keyLoader) {
this.keyLoader = keyLoader;
}
@Override
public void init() throws Exception {
securityKeys = keyLoader.load();
}
@Override
public String sign(String source) {
Preconditions.checkNotNull(source);
try {
Signature javaSignature = Signature.getInstance(ALGORITHM);
javaSignature.initSign(securityKeys.getPrivateKey());
javaSignature.update(source.getBytes());
return Base64.getEncoder().encodeToString(javaSignature.sign());
} catch (NoSuchAlgorithmException | InvalidKeyException | SignatureException e) {
throw new RuntimeException(e);
}
}
@Override
public boolean verify(String source, String signature) {
Preconditions.checkNotNull(source);
Preconditions.checkNotNull(signature);
try {
Signature javaSignature = Signature.getInstance(ALGORITHM);
javaSignature.initVerify(securityKeys.getPublicKey());
javaSignature.update(source.getBytes());
return javaSignature.verify(Base64.getDecoder().decode(signature));
} catch (NoSuchAlgorithmException | InvalidKeyException e) {
throw new RuntimeException(e);
} catch (SignatureException e) {
LOGGER.warn("Attempt to use a malformed signature '{}' for source '{}'", signature, source, e);
return false;
}
}
}