public static SignedPreKeyRecord generateSignedPreKey(
Context context, MasterSecret masterSecret, IdentityKeyPair identityKeyPair) {
try {
SignedPreKeyStore signedPreKeyStore = new TextSecurePreKeyStore(context, masterSecret);
int signedPreKeyId = getNextSignedPreKeyId(context);
ECKeyPair keyPair = Curve.generateKeyPair();
byte[] signature =
Curve.calculateSignature(
identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
SignedPreKeyRecord record =
new SignedPreKeyRecord(signedPreKeyId, System.currentTimeMillis(), keyPair, signature);
signedPreKeyStore.storeSignedPreKey(signedPreKeyId, record);
setNextSignedPreKeyId(context, (signedPreKeyId + 1) % Medium.MAX_VALUE);
return record;
} catch (InvalidKeyException e) {
throw new AssertionError(e);
}
}
