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Support "raw" EdDSA signatures (in reality they are double-hashed)

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This commit is contained in:
str4d
2014-04-26 13:03:38 +00:00
parent 2e2d3c39e6
commit 55d92fc9f2
1 changed files with 15 additions and 2 deletions
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17
core/java/src/net/i2p/crypto/DSAEngine.java
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@ -42,6 +42,7 @@ import java.security.interfaces.ECKey;
import java.security.interfaces.RSAKey;
import net.i2p.I2PAppContext;
import net.i2p.crypto.eddsa.EdDSAKey;
import net.i2p.data.Hash;
import net.i2p.data.Signature;
import net.i2p.data.SigningPrivateKey;
@ -549,7 +550,11 @@ public class DSAEngine {
throw new IllegalArgumentException("type mismatch hash=" + hash.getClass() + " key=" + type);
String algo = getRawAlgo(type);
java.security.Signature jsig = java.security.Signature.getInstance(algo);
java.security.Signature jsig;
if (type.getBaseAlgorithm() == SigAlgo.EdDSA)
jsig = new net.i2p.crypto.eddsa.EdDSAEngine(); // Ignore algo, EdDSAKey includes a hash specification.
else
jsig = java.security.Signature.getInstance(algo);
jsig.initVerify(pubKey);
jsig.update(hash.getData());
boolean rv = jsig.verify(SigUtil.toJavaSig(signature));
@ -623,7 +628,11 @@ public class DSAEngine {
if (type.getHashLen() != hashlen)
throw new IllegalArgumentException("type mismatch hash=" + hash.getClass() + " key=" + type);
java.security.Signature jsig = java.security.Signature.getInstance(algo);
java.security.Signature jsig;
if (type.getBaseAlgorithm() == SigAlgo.EdDSA)
jsig = new net.i2p.crypto.eddsa.EdDSAEngine(); // Ignore algo, EdDSAKey includes a hash specification.
else
jsig = java.security.Signature.getInstance(algo);
jsig.initSign(privKey, _context.random());
jsig.update(hash.getData());
return SigUtil.fromJavaSig(jsig.sign(), type);
@ -650,6 +659,8 @@ public class DSAEngine {
return "NONEwithDSA";
case EC:
return "NONEwithECDSA";
case EdDSA:
return "NONEwithEdDSA";
case RSA:
return "NONEwithRSA";
default:
@ -663,6 +674,8 @@ public class DSAEngine {
return "NONEwithDSA";
if (key instanceof ECKey)
return "NONEwithECDSA";
if (key instanceof EdDSAKey)
return "NONEwithEdDSA";
if (key instanceof RSAKey)
return "NONEwithRSA";
throw new IllegalArgumentException();