java-security

When I try to make ECC private key from byte array, I get exception mentioned below. I have public/private keys and out signed output from C library micro-ecc/uECC.h. C used secp192r1 curve. I am trying to verify data with C generated keys in Java. How to convert byte array to private/public key? Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); byte[] kb = new byte[]{(byte)0x24, (byte)0xF4, (byte)0x36, (byte)0x16, (byte)0xD0, (byte)0x96, (byte)0x12, (byte)0x63, (byte)0x90, (byte)0x2E, (byte)0x51, (byte)0xF6, (byte)0x87, (byte)0x55, (byte)0xAB, (byte)0xCB, (byte

I have some data that I'm signing on iOS with SecKeyRawSign using Elliptic Curve private key. However, verifying that data in Java using Signature.verify() returns false The data is a random 64 bit integer, split into bytes like so uint64_t nonce = (some 64 bit integer) NSData *nonceData = [NSData dataWithBytes: &nonce length: sizeof(nonce)]; From that data I'm creating a SHA256 digest int digestLength = CC_SHA256_DIGEST_LENGTH; uint8_t *digest = malloc(digestLength); CC_SHA256(nonceData.bytes, (CC_LONG)nonceData.length, digest); NSData *digestData = [NSData dataWithBytes:digest length

public class CustomTrustManager implements X509TrustManager { private X509TrustManager trustManager; // If a connection was previously attempted and failed the certificate check, that certificate chain will be saved here. private Certificate[] rejectedCertificates = null; private Certificate[] encounteredCertificates = null; private KeyStore keyStore = null; private Logger logger; /** * Constructor * * @param loggerFactory * see {@link InstanceLoggerFactory} */ public CustomTrustManager(InstanceLoggerFactory loggerFactory) { try { this.logger = loggerFactory.getLogger(CustomTrustManager.class)

I need to convert a .cer file to a .jks file. I saw a few questions about it, but haven't seen a solution to what I need. I don't need it in order to add it to my local certificates, but as a file to upload to a server. I also need to do it only once, and not programmatically. There's this thread Converting .cer to .jks using java and the author says he had done it successfully, but I couldn't comment to his last reply as I don't have enough reputation, nor could I send him a personal message and ask him. So if anyone knows of a simple way to do so, I'll be glad to hear. keytool comes with the

I have generated ECC public and private key using secp192r1 curve. I get 75 for public and 125 for private encoded key array length. Why private key is longer than public key? Why private key is not longer two times than public? Why private key is not 192 bits = 24 bytes because of secp192r1? Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); ECNamedCurveParameterSpec ecSpec = ECNamedCurveTable.getParameterSpec("secp192r1"); KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "BC"); g.initialize(ecSpec, new SecureRandom()); KeyPair pair = g.generateKeyPair()