elliptic-curve

Currently i'm updating my x.509 certificate library to support ECC. Most of the builders that are implemented take a publicKey and derive the algorithm and such from the key. In RSA this is simple, you check the algorithm of the key and you can verify the bit length. However with ECC the key is based on a curve, and the curve name (of course) needs to be specified in the certificate (as OID). The issue i'm working on right now is finding a way to come from either a java.security.interfaces.ECPublicKey or a org.bouncycastle.jce.interfaces.ECPublicKey to a curve name. (Both implementations are

Is there any example for use ECC in iOS? I noticed that the kSecAttrKeyTypeEC in Apple Developer Documents, but I can't use it to generic Key pair. Below code is modified from the example CryptoExercise // Container dictionaries. NSMutableDictionary * privateKeyAttr = [[NSMutableDictionary alloc] init]; NSMutableDictionary * publicKeyAttr = [[NSMutableDictionary alloc] init]; NSMutableDictionary * keyPairAttr = [[NSMutableDictionary alloc] init]; // Set top level dictionary for the keypair. [keyPairAttr setObject:(id)kSecAttrKeyTypeEC forKey:(id)kSecAttrKeyType]; [keyPairAttr setObject:

I've been looking around for hours on Google and Microsoft's Crypto API on how to generate a public and private ECC key pair. The ECDiffieHellmanCng Class ( http://msdn.microsoft.com/en-us/library/system.security.cryptography.ecdiffiehellmancng.aspx#Y3081 ) lists an example but I don't know how to access the private key directly. For a little background on the program, it's a C# console app for managing TrueCrypt sessions, AES pre-shared key encryption, and ECDH/AES encryption. I need a function to merely create a public/private key pair to save to files, then documentation of how to use those

I wan to encrypt /decrypt data using ECIES , I am using cryptopp for this. AutoSeededRandomPool prng; //get private key generated ECIES<ECP>::Decryptor d0(prng, ASN1::secp256r1()); PrintPrivateKey(d0.GetKey()); //get public key ECIES<ECP>::Encryptor e0(d0); PrintPublicKey(e0.GetKey()); //encrypt the message string em0; // encrypted message StringSource ss1 (message, true, new PK_EncryptorFilter(prng, e0, new StringSink(em0) ) ); //decrypt the message string dm0; // decrypted message StringSource ss2 (em0, true, new PK_DecryptorFilter(prng, d1, new StringSink(dm0) ) ); Everything else is fine

I have a PEM encoded Elliptic Curve public key that I'm trying to load into Bouncy Castle and everything I tried so far is failing. This is an example of the key I'm trying to load: -----BEGIN PUBLIC KEY----- MIGbMBAGByqGSM49AgEGBSuBBAAjA4GGAAQBhsFCcWY2GaiN1BjPEd1v+ESKO6/0 D0sUR4y1amHnOr3FZx6TdqdoSBqxownQrnAKGCwagGxUb7BWwPFgHqKQJHgBq+J7 F+6m5SKAEL1wS5pqya91N7oudF3yFW8oZRE4RQRdSLl3fV2aVXKwGDXciwhUhw8k x5OS4iZpMAY+LI4WVGU= -----END PUBLIC KEY----- It is generated by NodeJS Crypto module and the curve name is secp521r1. It's later on encoded into PEM by the npm package key-encoder . I already