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Add support for Ed25519 signatures.

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This commit is contained in:
akwizgran
2017-11-22 14:28:16 +00:00
parent 92748ac872
commit 166fc2948c
14 changed files with 333 additions and 34 deletions
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32
bramble-api/src/main/java/org/briarproject/bramble/api/crypto/CryptoComponent.java
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@@ -20,6 +20,10 @@ public interface CryptoComponent {
KeyParser getSignatureKeyParser();
KeyPair generateEdKeyPair();
KeyParser getEdKeyParser();
KeyParser getMessageKeyParser();
/**
@@ -61,7 +65,6 @@ public interface CryptoComponent {
* @param ourKeyPair our ephemeral keypair
* @param alice true if ourKeyPair belongs to Alice
* @return the shared secret
* @throws GeneralSecurityException
*/
SecretKey deriveSharedSecret(byte[] theirPublicKey, KeyPair ourKeyPair,
boolean alice) throws GeneralSecurityException;
@@ -106,7 +109,6 @@ public interface CryptoComponent {
* @param ourKeyPair our ephemeral keypair
* @param alice true if ourKeyPair belongs to Alice
* @return the shared secret
* @throws GeneralSecurityException
*/
SecretKey deriveMasterSecret(byte[] theirPublicKey, KeyPair ourKeyPair,
boolean alice) throws GeneralSecurityException;
@@ -130,7 +132,7 @@ public interface CryptoComponent {
long streamNumber);
/**
* Signs the given byte[] with the given PrivateKey.
* Signs the given byte[] with the given ECDSA private key.
*
* @param label A label specific to this signature
* to ensure that the signature cannot be repurposed
@@ -139,8 +141,17 @@ public interface CryptoComponent {
throws GeneralSecurityException;
/**
* Verifies that the given signature is valid for the signedData
* and the given publicKey.
* Signs the given byte[] with the given Ed25519 private keu.
*
* @param label A label specific to this signature
* to ensure that the signature cannot be repurposed
*/
byte[] signEd(String label, byte[] toSign, byte[] privateKey)
throws GeneralSecurityException;
/**
* Verifies that the given signature is valid for the signed data
* and the given ECDSA public key.
*
* @param label A label that was specific to this signature
* to ensure that the signature cannot be repurposed
@@ -149,6 +160,17 @@ public interface CryptoComponent {
boolean verify(String label, byte[] signedData, byte[] publicKey,
byte[] signature) throws GeneralSecurityException;
/**
* Verifies that the given signature is valid for the signed data
* and the given Ed25519 public key.
*
* @param label A label that was specific to this signature
* to ensure that the signature cannot be repurposed
* @return true if the signature was valid, false otherwise.
*/
boolean verifyEd(String label, byte[] signedData, byte[] publicKey,
byte[] signature) throws GeneralSecurityException;
/**
* Returns the hash of the given inputs. The inputs are unambiguously
* combined by prefixing each input with its length.