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Code Issues Releases Wiki Activity

ECDSA cannot be used for encryption

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M66B 2020-09-28 10:13:58 +02:00
parent b87dda9174
commit 9f32ca6fba
1 changed files with 2 additions and 12 deletions
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14
app/src/main/java/eu/faircode/email/FragmentCompose.java
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@ -127,9 +127,7 @@ import org.bouncycastle.cms.RecipientInfoGenerator;
import org.bouncycastle.cms.SignerInfoGenerator;
import org.bouncycastle.cms.jcajce.JcaSignerInfoGeneratorBuilder;
import org.bouncycastle.cms.jcajce.JceCMSContentEncryptorBuilder;
import org.bouncycastle.cms.jcajce.JceKeyAgreeRecipientInfoGenerator;
import org.bouncycastle.cms.jcajce.JceKeyTransRecipientInfoGenerator;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.DigestCalculatorProvider;
import org.bouncycastle.operator.OperatorCreationException;
@ -161,7 +159,6 @@ import java.nio.charset.StandardCharsets;
import java.security.GeneralSecurityException;
import java.security.InvalidKeyException;
import java.security.PrivateKey;
import java.security.Security;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.Collator;
@ -2835,15 +2832,8 @@ public class FragmentCompose extends FragmentBase {
// Encrypt
CMSEnvelopedDataGenerator cmsEnvelopedDataGenerator = new CMSEnvelopedDataGenerator();
if ("EC".equals(privkey.getAlgorithm())) {
Security.addProvider(new BouncyCastleProvider());
JceKeyAgreeRecipientInfoGenerator gen = new JceKeyAgreeRecipientInfoGenerator(
CMSAlgorithm.ECDH_SHA256KDF,
privkey,
chain[0].getPublicKey(),
CMSAlgorithm.AES128_WRAP);
for (X509Certificate cert : certs)
gen.addRecipient(cert);
cmsEnvelopedDataGenerator.addRecipientInfoGenerator(gen);
// https://security.stackexchange.com/a/53960
throw new IllegalArgumentException("ECDSA cannot be used for encryption");
} else {
for (X509Certificate cert : certs) {
RecipientInfoGenerator gen = new JceKeyTransRecipientInfoGenerator(cert);